SE526424C2 - Active night vision system for an internal passenger compartment of a vehicle and method for controlling said system - Google Patents

Abstract

A vision system (10) for an interior cabin (12) of a vehicle (14) includes an illuminator assembly (16) that generates an illumination beam (20) and is configured to be mounted within the interior cabin (12). A receiver assembly (18) generates an image signal in response to reflected portions of the illumination beam (20) and is configured to be mounted within the interior cabin (14). A controller controls generation of the illumination beam (20) and the image signal. A method of operating such a vision system is also described.

Description

25 30 35 f TI {\) * I 424 2 infrared light, and charge-coupled components or CMOS cameras for detecting reflected infrared light. Active systems typically utilize a light source externally relative to the vehicle to transmit a significant amount of light energy and provide a bright scene for image analysis.

Externally mounted light sources or cameras are undesirable due to the risk of injury in a vehicle collision. Components for night vision are relatively expensive and, as a result, protection of the components is desirable. Externally mounted light sources and cameras are also susceptible to theft. In addition, externally mounted sources and cameras may limit and compromise vehicle construction and design, may be aesthetically offensive, and may increase exposure to dust and debris equipment. Exposure to dust and debris adversely affects the performance of sources and cameras. When the sources and cameras are dirty, light transmission and reception can be significantly reduced and compromise system performance.

Externally mounted lighting sources have additional associated disadvantages. A significant disadvantage is that of controlling the wavelength of the illumination beam. Diode lasers are sensitive to changes in temperature. The wavelength of the output of a diode laser varies approximately 0.25nm for each degree Celsius temperature change. Since the external temperature varies considerably, it is difficult to control the temperature of the diode laser. Such temperature changes can adversely affect the performance of the night vision system. When mounted externally, there is also a risk of exposure to water, which can cause the laser to become unusable. Sealing and problems with the housing due to control of heat energy can also arise when securing diode lasers.

Furthermore, when designing the exterior of a vehicle, the external light source may be forced to adapt to satisfy design requirements. Thus, it is difficult _. n:: leat- i f _ Zappl i: aïi ont ext- 10 15 20 25 30 35 526 424 3 to achieve commonality for light sources between different vehicles.

Designing different light sources for different vehicles is costly.

Thus, there is a need for an improved active night vision system, which minimizes the system size and energy consumption of the lighting source, as well as maximizes the optical and thermal efficiency of a light source and the corresponding circuit contained therein.

Summary of the Invention The present invention provides an active night vision system for a passenger compartment of a vehicle. A lighting design creates a lighting beam. A receiver design creates an image signal in response to reflecting parts of the illumination beam. The lighting structure and the receiver structure are designed to be mounted inside the passenger compartment. An operating device controls the formation of the illumination beam and the image signal.

One of several advantages of the present invention is that it provides imaging systems having a light source and a receiver, both of which are located inside a passenger compartment of a vehicle. By doing so, it is easier to control the temperature of the light source and there is less risk of exposure to water or condensation of both the light source and the receiver. By having the light source and the receiver in the passenger compartment, it is also easier to develop a common imaging system for several different vehicles, since external constructions are no longer a problem.

Another advantage of the present invention is that it provides an efficient and reliable imaging system that is simple in construction and inexpensive to manufacture.

Furthermore, the present invention provides a light source and receiver mounting device which maintains purity of the light source and the receiver and provides a quality contrast image. "f". íOr; MTIW _2204 »íšš-il T.- (lv Ü 10 15 20 25 30 35 526 424 4 Furthermore, the present invention provides an imaging system which is compact in its construction and can be placed in different places inside a passenger compartment of a vehicle.

The present invention itself, together with further objects and advantages for the operator, will be best understood by reference to the following detailed description, and taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS For a more complete understanding of this invention, reference will be made to the accompanying drawings, in which embodiments are shown in more detail in the accompanying drawings and which are described below by way of example of the invention where: Figure 1 is a front perspective view of an active night vision system for a passenger compartment of a vehicle according to an embodiment of the present invention; Figure 2 is a side view in perspective and block diagram of an active night vision system according to an embodiment of the present invention; Figure 3 is a perspective view of the left side of a lighting system according to an embodiment of the present invention; Figure 4 is a perspective view of the right side of a lighting system according to an embodiment of the present invention; Figure 5 is a cross-sectional view of the lighting system shown in Figure 4; Figure 5 is a cross-sectional view of the lighting system shown in Figure 4; Figure 6 is a perspective view of the right rear of the module to maintain the alignment of the component according to an embodiment of the present invention. nïsai fi oï *. lëppl .is-az 1. fnnte-zzcr; I: 10 15 20 25 30 35 526 4-24 5 Figure 7 is a bottom perspective view of the module for maintaining the alignment of the component shown in Figure 6; Figure 8 is a top view of the module for maintaining the alignment of the component shown in Figure 6 and a light source dissipator according to an embodiment of the present invention; Figure 9 is a left front perspective view of the module for maintaining the alignment of the component shown in Figure 6, including a light source and a dissipator according to an embodiment of the present invention; Figure 10 is a left front perspective view of the structure of Figure 9 including a light housing and an alignment mechanism according to an embodiment of the present invention; Figure 11 is a block diagram of a receiver system according to an embodiment of the present invention.

Figure 12 is a logic flow diagram showing a method of mounting the lighting system of Figures 3-5 according to an embodiment of the present invention; Figure 13 is a logic flow diagram showing a method of mounting the lighting system of Figures 3-5 within a passenger compartment of a vehicle according to an embodiment of the present invention, and; Figure 14 is a logic flow diagram showing a method of operating the imaging system according to an embodiment of the present invention.

Description of Preferred Embodiments In the following, the same reference numerals will be used to refer to the same components. While the present invention is described with respect to an active night vision system for a vehicle, the present invention can be applied in various applications where near infrared imaging is desired, such as in adaptive cruise control applications, to "avoid collision. The present invention can be used during the day or at night.The present invention can be applied to various types and models of vehicles as well as to non-vehicle applications.

In the following description, various control parameters and components for a constructed embodiment will be described. These specific parameters and components are incorporated by way of example and should not be construed as limiting.

In the following description, the term “near infrared light” also refers to light having wavelengths within the spectrum of infrared light (750nm to 1000nm) and light having wavelengths near or just outside the spectrum of infrared light. The term also includes at least the spectrum of light emitted from the particular laser diode source described herein.

Referring to Figures 1 and 2, perspective views of an active night vision system 10 for an interior passenger compartment 12 of a vehicle 14 according to an embodiment of the present invention are shown.

The image processing system 10 includes an illumination system 16 and a receiver system 18. The illumination system 16 generates an illumination beam 20 having a beam pattern 22, which is directed towards a target area 24 located in front of the vehicle 14. Parts of the illumination beam 20 are reflected by objects (not shown) inside the target area 24 and is received by the receiver system 18. The receiver system 18 indicates two vehicle passengers, via an indicator 26, detection of the objects in response to reflected parts of the illumination beam 20. The image processing system 10 projects its illuminating laser through the windshield 28.

Reflections are similarly received by the receiver system 18 through the windscreen 28. Some windscreens contain IR blocking additives (usually iron particles) or films to reduce heat radiation to the interior of the vehicle due to ~ anizat; on \ Å% Z Ašïä PC öl 'J App1 ~ ca: íon: ex: TcTrstri 10 15 20 25 30 35 526 424 7 solljus. One such film is "XIR" ® film manufactured by Southwall Technologies Inc. To enhance the transmission and reception of IR energy through the windshield 28, the additive is omitted or the film is cut or left open in a transmission area 30 and a reception area 32 of the windshield. 28 for the illumination beam 20 and reflected portions thereof to pass through. In one example, the cutouts of film closely correspond to the apertures defined by the light envelope and the camera, which are described in more detail below. The image processing system 10 can be modified to transmit and receive the illumination beam 20 through any area of any window of the vehicle 14, which will become more apparent in light of the following description.

The illumination system 16 and the receiver system 18 are configured and positioned to transmit the illumination beam 20 and receive reflected portions thereof within the windshield wiper areas 34 of the windshield 28 which are kept clean by windshield wipers 35. Since the wiper blade areas 34 are typically clean to provide a clear view outside vehicle 14, the transmission and reception of the illumination beams 20 are mainly hindered or affected by dirt, debris, rain, or snow, unlike conventional night vision systems.

The dividing distance D between that transmitted 36 from the lighting structure 16 and that received 38 by the receiver structure 18 is preferably greater than about 30 cm. In one embodiment of the present invention, the spacing distance D is approximately 50 cm. Maintaining a minimum spacing distance is desirable to prevent the reception of a high level of light reflections and glare from highly reflective objects, such as road signs, in the target area 24. When the emitted 36 is placed too close to the received 38 high levels of reflected light "drown" and desired reflected portions of the illumination signal from objects within the target area 24 can adversely affect the image quality of the receiver system 18. Although a minimum separation distance is preferred, what is emitted may 36 and what is received 38 be in close proximity to each other, in other words, have a spacing distance of less than 30cm. In such cases, the intensity of the illumination beam 20 may be reduced, post-processing of the reflective portions may be required, or post-processing of images may be performed to provide an image of sufficient quality. Different gate techniques can also be used for transmitters and receivers to minimize indicated saturation due to occasional reflections.

The lighting system 16 is constructed to be mounted within an overhead bracket 40 above a rearview mirror 42, and the receiver system 16 is constructed to be mounted in front of a driver's seat 44 on an instrument panel 46, thereby providing a desired minimal separation of the distance between the emitted 36 and the received 38.

The lighting system 16 may be mounted along the front roof edge 47 or along any perimeter 48 of the windshield 28, and the receiver system 18 may be located on the instrument panel 46, as shown. Both systems 16 and 18 may be located at other different locations inside the passenger compartment 12. For example, the lighting system 16 and the receiver system 18 may be mounted at other locations around the windshield 28 or other windows of the vehicle 14. Referring also to Figures 3-5, perspective and cross-sectional views of the lighting system 16 according to an embodiment of the present invention are shown. The lighting system 16 includes a lighting structure 50 and a lighting control 52.

The lighting structure 50 comprises a light source unit 54 which creates light, which can be emitted from the unit in the form of a light beam, such as the beam 20. The light unit 54 is connected between a lighting dissipator 56 and a light source; \ Aš <~ _1 _. fïß fi / JJIE Applicazázrfx _ i 'mf x ïzs fl ï ~ * s: ra i .i' T fl- * IC 230479; Ilf. 7 .: “10 15 20 25 30 35 526 424 9 module 58 to maintain the alignment of a component. Light formed from the light unit 54 is directed through the module 58 where it is reflected and / or collimated to create the illumination pattern 22. The light beam 20 is emitted from the light unit 54 and passes through a housing 60 for the light unit and through the windshield 28. A cooling system 62 is located above the dissipator 56 and over a power supply 64 for thermal cooling thereof.

The cooling system 62 circulates air around the dissipator 56 across the power supply 64, and into an air gap 66 between a ceiling 68 and a roof 70 of the vehicle 14, thereby cooling the dissipator 56 and the power supply 64.

The light source unit 54 includes a light source 72 and may include a heater 74 and a thermistor 76, which may be enclosed within a housing for the light source 78. In the embodiment, the heater 78 is shown externally and separately from the housing 78. The light source 72 generates light by means of current from the power supply 64, via power supply lines 80. The heater 74 and the thermistor 76 are used to control the temperature of the light source 72, via heater and thermistor lines 82. The heater 74 increases the temperature of the light source 72 in response to the temperature signal created by the thermistor 76. The light source 72 also receives an illumination signal from the illumination control 52. The intensity of the illumination beam 20 is directly proportional to the voltage of the illumination signal. By having the heater 74 and the thermistor 76 inside the lighting structure 16, the temperature of the light source 72 can be controlled without adjusting the temperature inside the passenger compartment 12.

The light source 72 can be of different type and model.

Diode lasers are preferable to white incandescent light sources for several reasons. White incandescent light sources are not monochromatic like diode lasers, but instead emit energy over a large spectrum, which must be filtered to prevent glare from oncoming vehicles. Filtration of a significant part of the energy from a light bulb is expensive, 2355 Ûš »ll ï-fæzl: 5“: S'ï .'- “. F4 '\ ._ f3'fff.' \ '. 7§f10 ~ 2" -. ~ / ~ «. '. Rr. Nä, ä. X? Lö.:' | St. Ri:: tar F 10 15 20 25 30 35 10 inefficient from an energy point of view, and creates unwanted heat energy. In addition, several white incandescent light sources are often required to provide the required illumination, and thus increasing complexity and cost. In one embodiment of the present invention, the light source 72 is a near infrared diode laser having desired monochromatic and illumination properties.

The diode laser can be, for example, a single mode strip diode laser, model No. S-81-3000-C-200-H manufactured by Coherent Inc. of Santa Clara, California.

The dissipator 56 can be of different sizes, types and models available in the prior art. The dissipator 56 includes a heat coupling layer 84 covering a front surface 86 of the dissipator 56 located between the dissipator 56 and the light source 72. The heat coupling layer 84 provides efficient heat transport between the light source 72 and the dissipator 56. The heat coupling layer 84 may be made of indium or any other material that has similar thermal properties.

Referring also to Figures 6 and 7, perspective views of the module 58 in accordance with an embodiment of the present invention are shown. The module 58 includes a body 90 having a plurality of guides 91, including a light source guide 92, a light coupling guide 94, and an optical beamforming guide 96 for guiding, rigidly fixing, and maintaining alignment a light source 72, a light coupler 98, and a beam, respectively. - forming optics 100. The body 90 also has several supports 102 which are designed to support the light source 72, the light coupler 98, and the beam-forming optics 100 along the front roof area of the vehicle, such as the windshield circumference 48. The module 58 has an input 104 for a light beam offset from output 106 for a light beam. Light from the light source 72 is formed nearby and radiates horizontally through the input 104. It is then reflected in the set: .cr. "_ AR'1? I /. 98 to the optics 100, where it is again reflected towards and through the light housing structure 60, and out through the output 106. The module 58 may, in its simplest form, be referred to as a housing supporting the light source 72 and the optics 100 near the perimeter of a window. , such as the circumference 48.

The body 90 in combination with the light envelope (Figure 10) provides an optically sealed space 108, which minimizes penetration of the dust structure 60 and debris, thereby minimizing maintenance of the light source 72, light switch 98 and optics 100. The sealed space 108 also prevents the eye from exposed to light from the light source 72. The body 90 can be of different size, shape model and be made of different materials found in the prior art. The body 90 can be made of various materials steel, as well as other materials among known including plastic and metal, such as aluminum, and magnesium, technology. The body 90, when made of metal, can also function as a dissipator. The body 90 is opaque in one embodiment of the present invention to prevent light from entering or exiting the space 108. 94 and 96 are configured to maintain alignment of the light source 72 relative to the guides 92, to the light switch 98 and the optics 100. The guides 92, 94 and 96 assist in assembly due to their corresponding shapes, sizes, and assemblies and fix the light source 72, light switch 98, and optics 100 rigidly within the module 58.

The light source guide 92 along the mounting opening 114 helps to align and secure the dissipator 56 and the light source 72 to the module 58. Upon mounting, the brackets (not shown) extend through the openings 114, through the housing 78, and are threaded into the dissipator 56. and locks the light source 72 and the dissipator 56 at the module 58. The relative spatial relationship between the housing 78, the dissipator 56, and the module 58 is most clearly shown in Figure 8. fl organisaczcnäåkru A112 FC * '73 Kap-pl: cat i.::_n:ex: The light switch guide 94 is in the form of a pocket or slot 116 within the module 58. The slot 116 is shaped to conform to the shape of the light switch 98 and is positioned at approximately a 45 ° angle to the light source. guide 92. The light switch 98 is pushed, during assembly, into the slot 116 and attached to the module 58 in one of several positions by using the light coupling brackets (not shown) extending through the openings 117. Instead of the brackets extending through the openings 117, the light coupler 98 may be attached to the body 90 by means of spring clips (not shown) or the like. Although the light switch control 94 is shown as a stationary attached device coupled to or integrally formed with the body 90, the light switch control 94 may be part of a light switch assembly to adjust its position (not shown) for mechanical or electronic control of the position of the light switch 98. , using prior art techniques.

The beam-forming optical guide 96 is in the form of corner channels 118, which are angled to be approximately 45 ° relative to the light coupling guide 94, and to be parallel to reference plane 120 extending outwardly therefrom. During assembly, corner portions 122 of the optics 100 are pushed into the channels 118 where they are held in place inside, via brackets (not shown) extending through openings 122 of the channels 118, through the corner portions 122, and threaded into holes 126 on the insides 128 of the channels 118.

The light coupler 98 may be in the form of a mirror, as shown, a series of mirrors, a fiber optic cable or other reflecting or light transporting devices according to the prior art. In the described embodiment, light radiates from the light source 72 in the form of an elliptically shaped beam having a scattering angle of about 20-50 °, which is then reflected at an approximately 90 "downward angle by the light switch 98 to enter the optics 100. Although The present invention is described with respect to the use of a light coupler, so the present invention may be incorporated herein. modified to have direct radiation of light between the light source 72 and the optics 100, without using a light switch 98.

Although the optic 100 is preferably an optical element of sheet metal, it may be in some other form.

Continuing with the above-described embodiment, the optics 100 expand and reflect the light formed by the light source 72 at an approximately 90 ° angle to direct the light in front of the vehicle 14. Light from the light source 72 enters and is reflected by the optics 100, and is then reflected by a front surface 130 for radiating through the windshield 28. Even though a single optic is shown, additional optics may be incorporated inside the lighting system 16 or inside the module 58 to create a desired beam pattern on a target outside the vehicle 14.

The optics 100 may be formed of plastic, acrylic, or any other similar material of the prior art. The optics 100 can utilize the principle of total reflection (TIR) and form the desired beam pattern with series of stepwise facets; An example of a suitable optical element is described in U.S. Patent Application Serial No. 09 / 688,982 entitled "Thin-sheet collimation optics for diode laser illumination systems for use in night vision and exterior lighting applications".

The supports 102 include apertures 114 and side apertures 131. The apertures 131 extend through the housing structure 60 and the body 90. The apertures 114 and 131 allow the module 58 to connect to adjacent components within the illumination structure 16 to support the light source 72, light switch 98, and the the beam-forming optics 100 along the upper part of the windscreen opening 48. The openings 114 and 131 may be some other type of prior art support. Module 58 may also include other aids in addition to, or as a substitute for, the aids 102. fï- "Tïï fi ÉCH" "ÉJ" S 'ÉOï-J .C15 f-'lèïï fi ffC fi ll - OÉ-ll inf. A front outer surface 132 of the module 58 also serves as a guide for attaching the light housing structure 60 to the module 58. The outer surface 132 is similar in dimensions to, and slides within, a rear portion 134. of the light housing structure 60. The brackets (not shown) extend through openings 131 in the light housing structure 60 and are threaded into the module 58. The outer surface 132 of the module 58 is best seen in Figure 9.

The module 58 is provided for easy and accurate aiming of the illumination beam 20 by arranging the guides 91 to position the light source 72, the light switch 98, and the optics 100 appropriately. The module 58, by providing accurate alignment of the illumination beam 20, ensures adequate light transmission and precise illumination of the target area 24. An open configuration of the module 58 provides sufficient airflow for thermal cooling of the light source 72.

Air enters through the entrance, circulating around the light source 72, and passing over the dissipator 56.

Referring to Figures 10, there is shown a front perspective view from the left of the dissipator 56, the module 58, the light housing structure 60, and an alignment mechanism 138 according to an embodiment of the present invention.

The light housing structure 60 includes a light housing 140 which, as noted above, is coupled over and forms a light tight seal 142 with the module 58. A front portion 144 of the light housing 140 joins, and is sealed to, the windshield 28, via a light seal 146. Coupling of the light housing 140 with the module 58 in combination using the seal 146 prevents near infrared light from scattering or being reflected into the passenger compartment 12. The light housing structure 60 may also include a diffuser 148, as shown, which is snapped into the front position. 144 of the housing, via tabs 150.

The diffuser 148 refracts the light to limit the focused intensity of the light beam 20 as it leaves the light envelope 140. The position of the light switch 98 may be adapted even after the coupling of the light envelope structure 60 with the module 58. by means of notches 149 in the rear position 134 which allow access to brackets (not shown) extending through the openings 117.

The alignment mechanism 138 is used for transient alignment of the illumination beam 20. The alignment mechanism 138 includes a U-shaped hanging holder 152, which is shaped to hang over projections 154 of the dissipator 56, and has a pair of horizontal adjustment grooves 156. A pair of brackets (not shown) extend through the grooves 156 and are threaded into threaded holes 158 in the sides of the dissipator 56.

The U-shaped holder 152 may be divided into two halves 159, as shown in Figure 4, or it may be a simple integrated unit. The fastening mechanism 138 allows the dissipator to be rotated vertically and changed horizontally relative to the U-shaped holder 152. Holders of different shapes and combinations of holders can of course be used as well as other fastening devices according to the prior art.

The seal 146 can be designed in different ways and can be made of different materials. The seal 146, for example, may be made of rubber and formed as a gasket or wire. The seal 146 also compensates for design deviations of vehicle components, such as the lighting structure 16 and the windshield 28, by being compressible and forming tightly between the light housing 140 and the windshield 28, to ensure a seal that is easy to seal.

The diffuser 148 provides homogeneity to light radiating from the light envelope structure 60. The diffuser 148 may be applied directly to the optics 100 or it may be excluded from the system 10. The illumination beam 20 may emit homogeneously from the light envelope structure 60 using other prior art beams. Referring to Figures 3-5, the cooling system 62 includes an air duct 160 located above the dissipator 56 and over a pair of power dissipators 162 of the power supply 64. A cooling fan 164 is connected to the air duct 160 and circulates air around a circumference 166 of the dissipator 56, across cooling fins 168 of the dissipator 56 and 162, and dissipates heat energy from the dissipator 56 and 162 into the air gap 66. By cooling the dissipator 56 and 162, the light source 72 and the power supply are also cooled. 64.

The power supply 64 may also be of various sizes, shapes, and models according to the prior art. The power supply 64 includes a pair of dissipators 162, the lighting control 52, a capacitor 170, and protective housings 172 for the power supply. This unique combination of the controller 52, the power supply 64, and the dissipators 162 in combination with the proximal location of each device relative to the light source 72 provides several advantages. This is an efficient technique for supplying power to the light source 72 without current fluctuations or variations, which provides efficient cooling of the control 52 and the power supply 64, and it is a compact design for versatile use in various locations inside the vehicle passenger compartments without obstructing the view of a vehicle passengers. Capacitor 170 provides low voltage and high current used by the light source 72. The power supply 64 may also include an electromagnetic shield (not shown) which shields the power supply 64 from other electrical equipment located inside the vehicle 14.

In addition to the above-mentioned components and devices of the illumination system 16, a focal point adjustment 174 may be used, as shown, between the dissipator 56 and the light source 72 to adjust the focal point of the illumination beam 20 out of the light source 72. The focal point adjustment 174 may be in the form of a w ; N '\ N car vision, .ëpplfcaticxnLe-x:: cr I-'írYM 20011' QS-.ïï 'n- fi c: 10 15 20 25 30 35 526 424 17 or more inserts, as shown, or may be on any other means known in the art.

The lighting structure 16 is connected to the ceiling 70, via the U-shaped holder 152 and support holder 176.

The U-shaped holder 152 is connected to an extension holder 178, which in turn is connected to a construction frame 180. The support holders 176 are connected to the lighting structure 16 and to the frame 180.

The cooling system 62 is configured to be located within an overhead bracket holder 182, which is also connected to the frame 180. The lighting structure 16 may also include attachment points or positioners, such as positioners 184, to assist in their installation.

Although the lighting system 16 is described with respect to its use inside an overhead bracket, due to its low profile construction, it may be included in other assemblies of vehicle groups.

The lighting system 16 may be included within the vehicle posts, such as an A-pillar, in an instrument panel, in different locations of the ceiling, in a door panel, or in other locations adjacent the perimeter of a window.

The illumination system 16 allows rapid, simple and accurate aiming of the light source 72, without affecting the alignment of the light source 72 relative to the light switch 98 and the optics 100, and without affecting the thermal geometry of the desired cooling within the imaging system 10.

The above-described components and features of the lighting system 16 are mentioned for illustrative purposes only, the lighting system 16 may include other additional components or features of the prior art.

Referring to Figure 11, there is shown a block diagram of the receiver system 18 in accordance with an embodiment of the present invention. The receiver system 18 includes a receiver structure 190 having a receiver 192, an alignment device 194 for the receiver, a filter 196, n \ Aærz A112 @c \ 9§fïßf \ wïcHf v fia: 'ioutexïfcínsçricffor * f-ï / íåf. 20-34-- g .4 .W f ”. ..> .-. vu-i 10 15 20 25 30 35 18 and a control system for the receiver 194. The receiver 192 may be in the form of a charge coupled (CCD) camera or a complementary metal oxide semiconductor (CMOS) camera. For example, a CCD camera, model No. Wat902HS manufactured by Watec America Corporation of Las Vegas, Nevada, may be used as receiver 192. Near infrared light reflected from objects is received by receiver 192 to create an image signal. The filter 196 is used to filter the reflected near infrared light. The filter 196 may be an optical bandpass filter, which allows light within a near infrared light spectrum to be received by the receiver 192, which preferably corresponds to the wavelength of the light contained in the illumination signal 20.

The filter 196 may be separate from the receiver 192, as shown, or may be in the form of a coating on the lens of the receiver 192.

The alignment device 194 for the receiver can be used to adjust the reception angle of the reflected illumination beam 20. The alignment device 194 for the receiver can allow manual adjustment of the reception angle or it can be motorized and / or electrically controlled via the receiver control 198.

The receiver structure 190 may include a device (not shown) for adapting the receiver sensitivity to light consistent with ambient lighting. The light source 72 and / or the receiver 192 can also be in optical communication with the target vehicle (not shown). Referring again to Figures 3-5, controllers 52 and 198 are preferably microprocessor based, such as computers having central processing units, memory (RAM and / or ROM), and associated input and output buses. The controllers 52 and 198 may be integrated circuits specific to the applications or may be formed by other prior art logic devices. The controls 52 and 198 may be part of a vehicle central control unit, an interactive dynamic vehicle module, a limited control module, an overall safety control, combined in a simple integrated control, or they may be stand-alone. controls displayed.

The lighting control 52 controls the operation of the light source 72 and the power supply 64 while the receiver control 198 controls the operation of the receiver 192. the filter 196, and the alignment device 194 of the receiver. The guides 52 and 198 may be connected to the guides 199 for the imaging system, as shown in Figure 2, which are mounted on a center console 200. The system guides 199 may include an activation switch 201, an adjustment guide 202 for the light switch position, and a guide 203 for the power of the illumination beam 203.

The activation switch 201 can be used to activate the imaging system 10 manually or the imaging system 10 can be activated internally by one of the controls 52 or 198. The lighting system 10 can also be activated by using a voice activation system (not shown).

The light switch control 202 may be coupled to a light switch motor (not shown) to adjust alignment angles of the light switch 98 relative to the light source 72 and the optics 100. The power control 203 may be used to adjust the intensity of the illumination beam 20, which in turn adjusts the signal indicating the strength or sharpness of the indicator 26. an audio system, an LED, a lamp, a GPS system, an indicator 26 may include a video system, upward display, a headlamp, taillight, a display system, a telematics system or other indicators according to known technology. The indicator 26 can indicate position, range and speed in relation to the vehicle, as well as other known object parameters or properties. Objects may include any living or non-living object including pedestrians, vehicles, road signs, road markings, and other prior art objects. In one embodiment of the present invention, the indicator 26 is in the form of an upright display and the indication signal is projected to appear in front of the vehicle 14.

The indicator 26 provides a real-time view of the target area to increase the visibility of objects in conditions of relatively low levels of visible light, without having to refocus on the eyes to monitor a screen inside the passenger compartment.

The indicator 26 may include a liquid crystal display (LCD) display, a field of view mirror, as well as other low temperature operating components, a video for projecting visual field visualizations according to the prior art. The indicator 26 may resemble a road scene in a manner that allows a vehicle driver to quickly and easily pass the indicator 26 and the receiver structure 18 may be separate or part between the indicator 26 and the windshield 28. of a single package. The indicator 26 may include an opaque curved mirror. When the indicator 26 is not in use, it can be pulled into the instrument panel 46. The indicator 26 can have different resolution and size of field of view and can show objects that have different apparent sizes.

The windscreen 28 as above contains an XIR® film or the like, which acts as a near infrared absorber or reflector which prevents the transmission of near infrared light through the windscreen. The XIRQ film is manufactured by Southwall Technologies Inc. Although an XIRQ film is used, there may be other IR reflective layers, such as those formed when using a prior art cathode sputtering process. The windshield includes a pair of cutouts 206 when made where the XIR® film is left open in a transmission area 36 and receiving area 38 of the windshield for the light beams 20 and the reflected portion thereof to pass through. There may also be several IR layers inside the windshield 28, each of which has been left with an opening in the transmission area 36 and the reception area 38.

The imaging system 10 may also include the use of a color corrected light source and corresponding control circuit (not shown). The light source and control circuit may be included in module 58. The control circuit may also be included in one or other of the guides 52 and 198. For a further detailed explanation of the color-corrected light source or of the control circuit, see U.S. Patent Application Serial No. 10 / O64, l16, entitled " Color corrected laser illumination system for night vision applications ", submitted June 12, 2002 and inserted here for reference.

Referring to Figure 12, a logic flow diagram is shown for a method of mounting the lighting system 16 according to an embodiment of the present invention.

In step 220, the dissipator 56, the light source 72 and the module 58 are aligned with each other.

The focal point adjustment 174 may also be aligned with the light source 72. In step 222, the light source 72 is guided into the light source guide 92 of the body 90. In step 224, the dissipator 56 and the light source 72 are attached to the body 90. When used, the focal point adjustment 174 may also be attached to the body 90.

In step 226, the light switch 72 is guided into the body 90 via the light switch guide 94 and aligned with the light source 72 and attached to the body 90. In step 228, the optics 100 are guided into the body 90 and aligned with the light coupler 98, via channel shaped guides 96, and attached to body 90.

In step 230, the alignment device 138 is attached to the dissipator 56. In step 232, the air duct 160 is connected around the dissipator 56 to be in fluid communication with the dissipator 56. In step 234, the power supply 64 is connected to the air duct 160 to communicate with the air duct 160. step 236, the light envelope assembly 60 is coupled to the body 90.

Referring to Figure 13, a logic flow diagram shows a method of installing the lighting system 16 within the passenger compartment 12 according to an embodiment of the present invention.

-GfÉšë i "L 'lßjtf". Líf-.RÜZ Pfï. På .Ü V fl fšl fl áïffl 'A173 Applicat ic-nzextTcïzzstrfuzrtor lßiš-.TA íz fi šíri - 11' F .cšoc 10 15 20 25 30 35 526 424 22 In step 250 the lighting system is mounted.

The lighting system 16 can be mounted using the method described in the embodiment of Figure 12.

In step 252, the lighting system 16 is connected to the frame 180. The air duct 160 is positioned into the overhead bracket holder 182 and the alignment device 138 is attached to the extension holder 178.

The extension holder 178 and the support holder 176 are connected to the frame 180. In step 254, the light envelope of the lighting system 16 is sealed against the windshield 28. Steps 252 and 254 are intended to be performed simultaneously.

In step 256, the transfer angle of the illumination beam 20 of the illumination system 16 is adjusted by adjusting the body 90 relative to the U-shaped I step 258 when aligning or adjusting the transfer angle of the holder 152, as described above. the lighting system 16, the lighting system 16 is rigidly locked in a desired position.

Referring to Figure 14, a logic flow diagram shows a method of operating the imaging system 10 according to an embodiment of the present invention.

In step 300, the illumination system 16 creates the illumination beam 20 from within the passenger compartment 12. In step 302, light from the light source 72 of the illumination system 16 reflects and collimates to create a beam pattern in front of the vehicle 14.

In step 304, the module 58 and the light housing structure 60 direct the illumination beam 20 through the windshield 28, thereby illuminating the target area 24. Using the diffuser 148, the light envelope structure 60 can also scatter the illumination beam 20 before it is transmitted through the windshield 28.

In step 306, the radiated direction and focal point of the illumination beam 20 can be adjusted by using the alignment device 138 and the focal point adjustment 174. 2005405-13 14 ts fold,; M: ss: 2iss @; 73gr ": ÉJY ïï CN ~ J Q fi Jäs BJ 4> 23 In step 308, the receiver system 18 receives reflected portions of the illumination beam 20 through the windshield 28. In step 310, the receiver system 18, in response to the reflecting light at the desired wavelength, creates an image signal corresponding to detecting objects. within the target area 24. In step 312, the receiver control 198 generates the indication signal in response to the image signal In step 314, the indication signal is indicated to the passenger of the vehicle via the indicator 26.

The steps described above in Figures 12-14 are illustrative examples; the steps can be performed sequentially, synchronously, simultaneously or otherwise depending on the application.

The present invention provides an active night vision system having both a lighting system and a receiver system located within a passenger compartment of the vehicle. By having the lighting system and the receiver system located inside the passenger compartment, maintenance of the imaging system can be minimized and the risk of damage and / or theft can also be minimized. Extreme temperatures, humidity and airflows are no longer relevant or a problem because the lighting system and receiver system are located inside the passenger compartment.

Environmental settings are easy to maintain and control of the heat of the lighting system is easy to control.

The compact construction of the present invention can be easily packed in various places in a passenger compartment of the vehicle without obstructing the view of a vehicle passenger or affecting interior safety areas.

When the invention has been described in connection with one or more embodiments, it is to be understood that the specific mechanisms and techniques which have been described are merely illustrative of the principles of the invention, several modifications may be made to the methods and devices described the attached requirements. 2535-05-13 lêzßj “Jzï svs: aM: ss \ z ~ es4: vs \ r, rga2% sation \ ÄQTZ à fi TI f; App1¿ca: ioncex: Io

Claims (43)

10 15 20 25 30 35 24 PATENT REQUIREMENTS An image system for a passenger compartment of a vehicle comprising: a lighting structure comprising a light source which creates a light beam and arranged for mounting inside the passenger compartment; a receiver structure which generates an image signal in response to at least a reflected portion of said illumination beam and arranged to be mounted inside the passenger compartment; and at least one controller that controls the operating temperature of said light source and the formation of said illumination beam and said image signal. The system of claim 1, wherein said lighting structure comprises: a light source; and a beam-forming optic optically coupled to said light source to form a lighting pattern directed outside the vehicle. The system of claim 2, wherein said beamforming optics directs said illumination pattern through a window of the vehicle. The system of claim 2, wherein said lighting structure further comprises a light coupling that controls light generated from said light source between said light source and said beam-forming optics. The system of claim 2 further comprising at least one dissipator in thermal contact with said light source. The system of claim 2 further comprising a power supply that supplies said light source. É'EÉT \ E ”“ * ~ ÅTJÜCH ”'V' Ä S I Oil CIjOï F-iàfïf fl 23011! - Qf: al; f ... CCI: 10 15 20 25 30 35 526 424 25 The system of claim 2 further comprising: at least one dissipator in thermal communication with said light source; a power supply supplying said light source; an air duct in fluid communication with said at least one dissipator and said power supply; and a cooling fan in fluid communication with said air duct. The system of claim 2 further comprising a light housing structure coupled between said lighting structure and a window of the vehicle. The system of claim 8 further comprising a light seal coupled between said light housing structure and said window The system of claim 2, wherein said lighting structure comprises: a temperature sensor that senses the temperature of said light source and creates a temperature signal; and a heater for increasing the temperature of said light source in response to said temperature signal. 11. ll. The system of claim 10, wherein said at least one controller is coupled to said temperature sensor and to said heater and adjusts the temperature of said light source in response to said temperature signal. The system of claim 2, wherein said light source is a near infrared light source. The system of claim 2, wherein said light source is a diode laser. “ÏIISTOtI .GM-OS Efloc 10 15 20 25 30 35 526 424 26 The system of claim 2, wherein said beamforming optics is a collimating optics. The system of claim 2, wherein said lighting structure comprises a component alignment maintenance module for maintaining alignment of said light source with said beamforming optics. The system of claim 1, wherein said lighting structure directs said lighting beam through a wiper blade area of the vehicle. The system of claim 1, wherein said lighting structure comprises a diffuser for scattering said lighting beam. The system of claim 1, wherein said lighting structure comprises a focal point adjustment for adjusting the focal point of said light beam. The system of claim 1, wherein said lighting structure comprises an alignment device for directing said light beam. The system of claim 1, wherein said at least one control comprises: a first control coupled to said lighting structure and arranged to control the transmission parameters of the lighting beam; and a second guide coupled to said receiver structure and to said first guide and arranged to control the reception parameters of the illumination beam. The system of claim 1, wherein said at least one controller is arranged to coordinate the synchronization 2C05 ~ 0š 13 14:29 SY $ ÉEMïSE \ 2! ÛC4]? i? ENíïKlG fl É VÜSTÜN astra:: Hïívï fl 2634 05 Fi gcïcc 10 15 20 25 30 35 57.6 424 27 for the transmission and reception of said light beam and said at least one reflected part. The system of claim 1, wherein said at least one controller generates an indication signal in response to said image signal. The system of claim 22, further comprising an indicator coupled to said at least one controller and displaying said indication signal. The system of claim 1, wherein said receiver structure comprises a receiver that receives said at least one reflective member and creates said image signal. The system of claim 24, wherein said receiver is a charge coupled device or complementary metal oxide semiconductor device. The system of claim 24, wherein said receiver is sensitive to light within a visible or infrared range. The system of claim 1, wherein said receiver structure comprises a device for adjusting a receiver sensitivity to light corresponding to ambient brightness. The system of claim 1, wherein said lighting structure is in optical communication with a target vehicle. The system of claim 1, wherein said receiver structure is in optical communication with a target vehicle. 'xëoc 10 15 20 25 30 35 526 424 28 The system of claim 1, wherein said receiver structure comprises a receiver alignment device for adjusting a receiver angle of said illumination beam. The lighting structure comprising a light source and wherein the System of claim 1, wherein said receiver structure comprises a receiver, said light source being mounted within the passenger compartment in the vicinity of said receiver. The lighting structure comprises a light source and wherein the System according to claim 1, wherein said receiver structure comprises a receiver, said light source being mounted inside the passenger compartment at least 30cm from said receiver. The system of claim 1, wherein said lighting structure and said receiver structure are adapted for transmission and reception through a window of the vehicle. The system of claim 33, wherein said lighting structure and receiver structure are adapted for transmission and reception through a window of the vehicle having at least one infrared reflective layer. The system of claim 34, wherein said at least one infrared reflective layer comprises an opening therethrough in the areas of transmission and reception of said window for said light beam and said at least one reflective member to pass therethrough. A vehicle passenger compartment comprising: a first vehicle-integrated interior cluster comprising a lighting structure comprising a light source that creates a lighting beam; a second vehicle-integrated interior cluster comprising a receiver structure that generates an image signal in response to at least a reflected portion of said illumination beam; and at least one controller that controls the operating temperature of said light source and the formation of said illumination beam and said image signal. The vehicle passenger compartment of claim 36, wherein said first vehicle-integrated interior cluster and said second vehicle-integrated interior cluster are clusters selected from at least one of an overhead bracket, an instrument panel, an A-pillar structure, and a window structure. A method of controlling an image system of a passenger compartment of a vehicle comprising: creating light from within the passenger compartment; creating a light beam from said light; controlling the operating temperature of a light source forming said light; directing said light beam through a window of the vehicle; receiving at least a reflected portion of said light beam through said window; and creating an image signal in response to said at least one reflective member. The method of claim 38, wherein the formation of said illumination beam comprises collimating said light. The method of claim 38, further comprising reflecting said illumination beam. ~ * sat; @n \ AR? 2 A fi tz Appl 'cat icmtextïo fl svz: w.co @ 10 526 4-24 30 The method of claim 38, further comprising adjusting a radiated direction through the windshield of said vehicle. The method of claim 38, further comprising scattering said illumination beam. The method of claim 38, further comprising adjusting a focal point of said illumination beam.