TW201512583A - Light condensation projecting light bulb with sideway light source - Google Patents

Abstract

A light condensation projecting light bulb with sideway light source comprises a heat dissipation cup, a base, and a reflection structure. The heat dissipation cup has an inside surface and an installation space. The base is mounted in the installation space and comprises a plurality of substrates that are mounted to the inside surfaces. Each substrate has a back surface in contact engagement with the inside surface of the heat dissipation cup and a front surface on which LED elements are mounted to provide a sideway light source. Light emitting from the LED elements is projected outward through the reflection structure. The plurality of sideway light sources is converted by the reflection structure into a forward projecting light source and an effect of light mixing is induced to thereby form a single light source so as to eliminate the phenomenon of shadow overlapping. Further, the substrates are in direct contact with the inner side of the heat dissipation cup at locations corresponding to heat dissipation fins so as to have the heat conduction path shortened thereby improving the effect of heat dissipation.

Description

Concentrating LED projection bulb with side light source

This creation is about a concentrating LED projection bulb, especially a concentrating LED projection bulb with a side light source, which avoids the phenomenon of overlapping and has excellent heat dissipation effect.

LED bulbs are a fairly common source of light. Please refer to the schematic diagram of the projection light bulb shown in FIG. 8A and FIG. 8B. The large-area LED light source 70 of FIG. 8A is composed of a high-power LED element or a plurality of low-power LED elements, and a reflector 71 is disposed on the outer side thereof; and a small-area LED light source of FIG. 8B is provided. The 72-series low-power LED element is also provided with a reflecting plate 73 on the outer side thereof, wherein the reflecting plates 71, 73 shown in Figs. 8A and 8B have the same length dimension. As can be seen from FIG. 8A, due to the distance factor of the large-area LED light source 70 to the reflecting plate 71, the projection angle is large, and the light emitted by the large-area LED light source 70 is partially reflected on the reflecting plate 71 to become a projection beam (A). ), but most of the light (B) is not reflected by the reflector 71 and cannot be condensed into a projected beam, resulting in poor projection. Generally, the large-area LED light source 70 is used to make the projection bulb, which cannot achieve effective concentrating. One of the reasons. As shown in FIG. 8B, therefore, only a small-area LED light source 72 is used at present, and the projection angle thereof is small. Therefore, the light emitted by the small-area LED light source 72 can be reflected on the reflection plate 73 to be concentrated and become a projection beam (C). ).

But usually a small area LED light source 72 means drive power Nor can it be too high. If a single high-power LED component is used as the LED light source for the projection bulb, the heat source will be concentrated on the single LED component. The higher the power density of the LED component, the hot spot of the LED component will be generated, which will cause heat dissipation. The effect is even worse. Therefore, the conventional LED light bulb is a structure of the Japanese Patent No. M443356, which comprises a lamp cup, a substrate and a projection lens. The lamp cup has an accommodating space, and the substrate is disposed at the bottom of the accommodating space and has a The front side faces a light emitting surface and is provided with a plurality of LED elements. The projection lens is disposed on the light cup and includes a plurality of projection surfaces respectively corresponding to the LED elements. When the LED element emits light, the projection surface can assist the light to be projected in a specific direction, so that it is not necessary to concentrate all of the output power on a single LED element, but each of the plurality of LED elements can be concentrated.

However, the aforementioned LED bulbs have a problem of overlapping. Referring to FIG. 9A, it is assumed that an LED light source 74 projects light toward an object 75, and the backlight side of the object 75 produces a shadow 76. Since the LED light source 74 is a single light source, the object 75 produces a single shadow 76. However, referring to FIG. 9B, the LED bulb of the aforementioned Taiwan Patent No. M443356 has a plurality of LED elements corresponding to a plurality of LED light sources 77, and each of which projects light to the object 78, and each of the LED light sources 77 is an independent light source. When the LED light sources 77 are respectively irradiated on the object 78, the object 78 is caused to generate a plurality of shadows 79, thereby deriving a superimposed phenomenon, which may interfere with the vision of the eyes, causing fatigue and discomfort.

In order to avoid the phenomenon of stacking, there is a high-power LED bulb comprising a larger-sized lamp cup, a substrate and a projection lens, and a high-power LED element is disposed on the front surface of the substrate (for example, greater than 4W) The power consumption on the substrate) improves the uniformity of the light field to eliminate the phenomenon of stacking. However, the package area of the high-power LED element is relatively larger, and the principle explained in FIG. 8A is generated. The projection lens or the reflector 73 must also have sufficient The large size of the projection surface reflects the light from the high-power LED components. In order to achieve a specific narrow-angle projection light effect, due to the large volume of the lamp cup, the substrate and the projection lens, it is difficult for the user to install the LED bulb and affect the appearance of the LED bulb. However, if a reasonable lamp volume and aesthetic design are considered, the effect of narrow-angle projection cannot be achieved. Because of the basic rule of the limited optical principle, a large-area illumination source requires a large reflection structure to achieve a specific focusing effect.

Finally, please refer to the conventional LED bulb diagram shown in FIG. 10, and the LED light source 80 is disposed at the bottom 82 of the lamp cup 81. When the LED light source 80 emits light, as indicated by the arrow, the thermal energy is transmitted from the bottom 82 of the lamp cup 81 to the heat dissipation fin 83 on the outer surface, and finally the heat dissipation fin 83 is used for heat dissipation, and the heat conduction path is long, which affects the heat dissipation effect. .

In view of the shortcomings of the existing LED bulbs and the disadvantages of poor heat dissipation, the main purpose of the present invention is to provide a concentrating LED projection bulb with a side light source, in addition to eliminating the phenomenon of folding, while achieving a narrow angle projection effect. Improves heat dissipation.

The concentrating LED projection bulb having a side light source comprises: a heat dissipating lamp cup having an inner side and an assembly space therein; and a body disposed in the assembly space and including a substrate on the inner side surface; The substrate has a back surface and a front surface, and the back surface is in contact with the heat dissipation An inner side surface of the lamp cup, the front side is provided with an LED element as a side light source; and a reflective structure is disposed in the assembly space and includes a reflective surface, the reflective surface being located inside the front side of the substrate.

According to the structure of the present invention, when the LED elements emit light, the light is reflected by the reflective structure. Since the light emitted by the LED elements is projected externally through the same reflective structure, instead of directly projecting light directly. Therefore, the plurality of side light sources are converted into a forward-projection light source through the reflection structure, and a light-mixing effect is generated to form a single light source, and the single light source naturally has no overlapping phenomenon, thereby eliminating the folding phenomenon of the prior art.

In terms of heat dissipation effect, since the LED components are disposed on the substrate, and the substrate directly contacts the inner side surface of the heat dissipation lamp cup, relative to the inner side of the heat dissipation fin, the heat conduction path of the present invention is better than the conventional technology by the lamp cup. The heat conduction path from the bottom to the side heat sink fins is greatly shortened. Therefore, the heat energy generated by the LED component of the present invention is directly transmitted to the heat dissipation fin of the heat dissipation lamp cup for heat dissipation, thereby improving the heat dissipation effect.

In addition, compared with the prior art, the area in which the LED elements are provided by the plurality of substrates in the present invention is larger than the area in which the conventional single substrate can provide the LED elements, and thus the present invention can provide more LED elements than the prior art. Moreover, a larger number of low-power LED elements are disposed on the substrate to achieve the purpose of thermal energy dispersion, and the heat density of the LED elements is effectively reduced, so that the heat dissipation capability is better.

For example, limited by the area of the conventional substrate, when the conventional LED bulb wants to achieve a certain brightness, the conventional LED bulb uses a high-power LED. The component causes an increase in the overall volume of the conventional LED bulb. However, due to the increase in the area of the LED component that can be set by the present invention, when the LED bulb of the present invention is to achieve the brightness, a plurality of low-power LED components can be mounted on each substrate to achieve the brightness, and the low-power LED component is used and the side is matched. The optical design of the special reflective structure of the light-in type does not require the use of a large-sized lamp cup and lens, and does not cause an increase in the volume of the LED projection bulb of the present invention, and the heat density of the low-power LED component is low, so that the heat dissipation effect can be achieved. More significant.

The present invention overcomes the problem of dispersion of the original light source by using a side light source and a reflective structure by using optical technology, and at the same time, by dispersing the heat source and shortening the heat conduction path, the heat dissipation function is increased, and the projection light effect at the same time can be concentrated to make the LED projection bulb The technology breaks through the long-standing bottlenecks of the original.

10‧‧‧heating lamp cup

11‧‧‧ openings

12‧‧‧ Assembly space

13‧‧‧ 容容

14‧‧‧ inside side

15‧‧‧ Heat sink fins

20‧‧‧Drive Circuit Board

21‧‧‧ group end

30‧‧‧ body

31‧‧‧floor

310‧‧‧Set hole

32‧‧‧Substrate

321‧‧‧back

322‧‧‧ positive

40‧‧‧LED components

50‧‧‧Reflective structure

51‧‧‧Ontology

510‧‧‧Into the glossy surface

511‧‧‧Cone reflecting surface

512‧‧‧reflective layer

52‧‧‧Translucent plate

520‧‧‧Light scattering surface

60‧‧‧LED light source

61‧‧‧heating lamp cup

610‧‧‧ inside

62‧‧‧Heat fins

70‧‧‧Large-area LED light source

71‧‧‧reflector

72‧‧‧Small area LED light source

73‧‧‧reflector

74‧‧‧LED light source

75‧‧‧ objects

76‧‧‧ shadow

77‧‧‧LED light source

78‧‧‧ objects

79‧‧‧ shadow

80‧‧‧LED light source

81‧‧‧light cup

82‧‧‧ bottom

83‧‧‧Heat fins

Figure 1 is a perspective exploded view of the first preferred embodiment of the present invention.

Fig. 2 is a perspective view showing the appearance of the first preferred embodiment of the present invention.

Figure 3 is a cross-sectional view showing the first preferred embodiment of the present invention.

Figure 4 is a cross-sectional view showing a preferred embodiment of the reflective structure in the present creation.

Figure 5 is a cross-sectional view showing a preferred embodiment of the reflective structure in the present creation.

Figure 6: Reference diagram of the reflected light reflected by the reflective structure in this creation.

Figure 7 is a schematic illustration of the thermally conductive path of the preferred embodiment of the present invention.

Fig. 8A is a schematic diagram of light projection of a conventional LED light source (1).

Fig. 8B is a schematic diagram of light projection of a conventional LED light source (2).

Figure 9A: Schematic diagram of a single LED source illuminating an object.

Figure 9B is a schematic illustration of a plurality of LED light sources illuminating an object.

Figure 10: Schematic diagram of the heat conduction path of a conventional LED bulb.

Referring to FIGS. 1 to 3, the LED projection lamp of the present invention comprises a heat dissipation lamp cup 10, a driving circuit board 20, a body 30, a plurality of LED elements 40 and a reflection structure 50.

The heat sink cup 10 has an inner side surface 14 and an assembly space 12, and the assembly space 12 includes a front opening 11 and a plurality of receptacles 13 formed on the inner side surface 14. The outer side surface of the heat dissipation lamp cup 10 can be formed. A plurality of heat sink fins 15. The heat sink cup 10 can be a member made of aluminum, copper, graphite, ceramic or thermally conductive plastic.

The driving circuit board 20 is disposed at the bottom of the assembly space 12 and includes a plurality of terminals 21 facing the opening 11 of the heat dissipation lamp cup 10. The driver circuit board 20 can be a printed circuit board (PCB), a flexible printed circuit board (FPC), a metal printed circuit board (MCPCB), or an FR4 board.

The base body 30 is disposed in the assembly space 12 of the heat dissipation lamp cup 10. The base body 30 includes a bottom plate 31 and a plurality of base plates 32. The bottom plate 31 includes a mounting hole 310. The mounting hole 310 of the bottom plate 31 is connected to the assembly end 21 of the driving circuit board 20, so that the bottom plate 31 is fixed thereto. In the assembly space 12, a driving circuit electrically connecting the LED elements 40 may be disposed on the bottom plate 31. The substrates 32 are disposed on the outer edges of the front side of the bottom plate 31 and are respectively disposed in the plurality of slots 13 , and the substrate 32 and the bottom plate 31 . Electrical connection. Each of the substrates 32 includes an opposite back surface 321 and a front surface 322 that contacts the inner side surface 14 of the heat dissipation lamp cup 10. In the preferred embodiment, the substrates 32 are integrally connected to the bottom plate 31.

The plurality of LED elements 40 are disposed on the front surface 322 of the substrate 32 as a side light source, and the LED element 40 is electrically connected to the driving circuit board 20 for driving the plurality of LED elements 40 to emit light.

The reflective structure 50 is disposed in the heat sink cup 10 and includes a body 51. The body 51 is located in the assembly space 12, and the body 51 includes a reflective surface located inside the front surface 322 of the substrate 32. In the preferred embodiment, the outer peripheral side of the body 51 is formed with a plurality of light incident surfaces 510. The light incident surfaces 510 face the front surface 322 of the substrates 32. The light incident surfaces 510 may be flat or curved. The reflecting surface may be a tapered reflecting surface 511 recessed at the rear end of the body 51, and the tapered reflecting surface 511 is located inside the body 51. The front end of the reflective structure 50 is located at the opening 11 of the heat sink cup 10. Referring to FIG. 2, the front side of the reflective structure 50 has a light scattering surface 520, which may be a wavy surface.

Referring to FIG. 4, in another preferred embodiment, the body 51 forms a reflective layer 512 on the tapered reflective surface 511. The reflective layer 512 can completely reflect the light emitted by the LED element 40, thereby enhancing the creation. Project the brightness of the bulb.

As shown in FIG. 5 , the reflective structure 50 further includes a light-transmitting plate 52 . The body 51 and the light-transmitting plate 52 can be separated. The body 51 can be an umbrella-shaped reflector and can be disposed on the base 30 . On the bottom plate 31, the A reflecting surface is formed on an outer surface of the umbrella-shaped reflector, and the reflecting surface may be the tapered reflecting surface 511.

Referring to FIG. 6 , in the first preferred embodiment, when the LED component 40 emits light, the light 60 passes through the light incident surface 510 of the reflective structure 50 and is reflected on the tapered reflective surface 511 , thereby The light scattering surface 520 of the light transmissive plate 52 projects outward, and the light scattering surface 520 can scatter light to be more uniform. Since the reflective structure 50 reflects the light 60 emitted by all the LED elements 40 to the outside, as a whole, the creation is regarded as a single light source. By the arrangement of the reflective structure 50, when the object is illuminated by the creation, the stack can be avoided. The phenomenon of shadow.

Moreover, since the present invention causes the LED element 40 to be disposed on the substrate 32, compared to the prior art, the plurality of substrates 32 provide the LED element 40 to have an area larger than that of the conventional substrate to provide the LED element. For providing more LED elements 40. In this way, the present invention can use a plurality of low power LED elements 40 to achieve a particular brightness without the need to directly use high power LED elements to achieve this brightness.

The low-power LED component 40 generates much lower thermal energy than the high-power LED component, and the substrate 32 directly contacts the inner side surface 14 of the heat-dissipating lamp cup 10 and corresponds to the inner side of the heat-dissipating fin 15 . The thermal energy generated by the LED element 40 in the creation is quickly conducted to the heat dissipation fins 15, thereby providing the shortest heat conduction path for optimum heat dissipation. As shown in the schematic diagram of FIG. 7, the LED element described above corresponds to the LED light source 60, and the LED light source 60 is disposed on the inner side surface 610 of the heat dissipation lamp cup 61. As shown by the arrow in Fig. 7, and comparing the heat conduction paths of the conventional LED bulb shown in Fig. 10, the heat conduction path of the present invention is much smaller than that of the conventional LED. The heat conduction path of the bulb is rapidly transmitted to the heat dissipation fins 62 disposed outside the heat dissipation cup 61, which has better heat dissipation effect than the conventional LED bulb.

10‧‧‧heating lamp cup

11‧‧‧ openings

12‧‧‧ Assembly space

13‧‧‧ 容容

14‧‧‧ inside side

15‧‧‧ Heat sink fins

20‧‧‧Drive Circuit Board

21‧‧‧ group end

30‧‧‧ body

31‧‧‧floor

310‧‧‧Set hole

32‧‧‧Substrate

321‧‧‧back

322‧‧‧ positive

40‧‧‧LED components

50‧‧‧Reflective structure

51‧‧‧Ontology

510‧‧‧Into the glossy surface

511‧‧‧Cone reflecting surface

Claims (16)

A concentrating LED projection lamp having a side light source, comprising: a heat dissipating lamp cup having an inner side and an assembly space; and a body disposed in the assembly space and including a substrate on the inner side surface The substrate has a back surface and a front surface, the back surface is in contact with the inner side surface of the heat dissipation lamp cup, the front surface is provided with an LED element as a side light source, and a reflective structure is disposed in the assembly space and includes a reflective surface, the reflection The faces are located on the inside of the front side of the substrates. The concentrating LED projection light bulb having a side light source according to claim 1, wherein the assembly space has a front opening, the reflective structure includes a body, and a peripheral side surface of the body forms a light incident surface, and the light incident surfaces Facing the front surface of the substrates, the reflecting surface is formed at the rear end of the body and located inside the light incident surfaces. The concentrating LED projection lamp having a side light source according to claim 1, wherein the assembly space comprises a plurality of pockets formed on an inner side surface of the heat dissipation lamp cup, and the plurality of substrates of the base body are respectively disposed in the plurality of pockets. The concentrating LED projection lamp having a side light source according to claim 2, wherein the reflecting surface is a tapered reflecting surface recessed at a rear end of the body. A concentrating LED projection lamp having a side light source as claimed in claim 4, wherein a reflective layer is formed on the reflective surface. The concentrating LED projection lamp having a side light source according to any one of claims 2 to 5, wherein a front side of the reflective structure has a light scattering surface. The concentrating LED projection lamp having a side light source according to claim 6, wherein the base body comprises a bottom plate, and the substrate is formed on the bottom plate The outer edge of the front side is electrically connected to the bottom plate. The concentrating LED projection lamp having a side light source according to claim 7, wherein the bottom plate of the base body is provided with a driving circuit electrically connecting the LED elements. The concentrating LED projection lamp having a side light source according to claim 7, further comprising a driving circuit board disposed in the assembly space and including a set of terminals, wherein the bottom plate of the body is connected to the driving circuit The assembly ends of the plates are fixed in the assembly space of the heat sink cup. The concentrating LED projection light bulb having a side light source according to claim 1, wherein the assembly space has a front opening, the reflective structure comprises a body and a light-transmissive plate which are separated, and the body is an umbrella The reflector is formed on an outer surface of the umbrella-shaped reflector, and the light-transmitting plate is disposed in the opening of the heat-dissipating lamp cup. The concentrating LED projection lamp having a side light source according to claim 10, wherein the reflecting surface is a tapered reflecting surface. A concentrating LED projection lamp having a side light source according to any one of the preceding claims, wherein the front side of the light transmissive plate has a light scattering surface. The concentrating LED projection lamp having a side light source according to claim 12, wherein the base body comprises a bottom plate formed on an outer edge of a front side of the bottom plate. The concentrating LED projection lamp having a side light source according to claim 13, wherein a driving circuit electrically connecting the LED elements is disposed on the bottom plate of the base. The concentrating LED projection lamp having a side light source according to claim 13, further comprising a driving circuit board, wherein the driving circuit board is disposed in the package The mating space includes a set of terminals, and the bottom plate of the base is connected to the assembly end of the driving circuit board and fixed in the assembly space of the heat dissipating lamp cup. The concentrating LED projection lamp having a side light source according to claim 10, wherein the assembly space comprises a plurality of pockets formed on an inner side surface of the heat dissipation lamp cup, and the plurality of substrates of the base body are respectively disposed in the plurality of pockets.