JP4081715B2 - Liquid crystal display - Google Patents

Liquid crystal display Download PDF

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Publication number
JP4081715B2
JP4081715B2 JP2002309358A JP2002309358A JP4081715B2 JP 4081715 B2 JP4081715 B2 JP 4081715B2 JP 2002309358 A JP2002309358 A JP 2002309358A JP 2002309358 A JP2002309358 A JP 2002309358A JP 4081715 B2 JP4081715 B2 JP 4081715B2
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Prior art keywords
light
liquid crystal
crystal panel
front panel
panel
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JP2004144969A (en
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環 小野寺
進一 坂野
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Victor Company of Japan Ltd
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Victor Company of Japan Ltd
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Description

【0001】
【発明の属する技術分野】
本発明はオーディオ装置その他の電気機器に用いられる液晶表示装置に係わり、特に表示画面に奥行き感があり、これを引き立たせるようなイルミネーション効果をもつ液晶表示装置に関する。
【0002】
【従来の技術】
従来、オーディオ装置などに装置される表示器として、消費電力が少なく薄型で軽量な液晶ディスプレイ(LCD:liquid crystal display)が一般に広く利用されている。このLCDには電気アドレス方式、熱アドレス方式、光アドレス方式があり、このうち電気アドレス方式は電極構成の相違によりセグメント電極駆動方式とマトリクス電極駆動方式とに大別される。更に、電気アドレス方法の相違によって、前者はスタティック駆動とダイナミック駆動に、後者はパッシブマトリクス(PM)駆動とアクティブマトリクス(AM)駆動に分類される。
【0003】
取り分け、a-Si形やp-Si形などの薄型トランジスタを用いるTFT駆動AM−LCDはコントラストやレスポンスなどの表示性能に優れるが、何れのLCDでも液晶パネル自体は非発光であるため外部照射光を必要とする。なかには、MIN(metal-insulator-metal)形AM−LCDなどにみられるように、外部照射光として自然光を用いる反射形の液晶パネルもあるが、明るさや画質を要求されるものは透過形が主流である。このため、LCDの多くは液晶パネルの裏側にバックライトを備えている。
【0004】
そのバックライトには大別して反射板方式(直下方式)、導光体方式(エッジライト方式)、及び面状光源方式の三つがある。このうち、反射板方式は反射板と拡散板とで構成される光学筺体の中に蛍光ランプなどを収納し、その放射光を反射・拡散させて面光源とするものである。又、導光体方式は蛍光ランプなどの発光体の放射光をアクリルやポリカーボネートといった導光板の側面から入射させ、その入射光を導光板内で多重反射させて面光源とするものであり、面状光源方式は冷陰極平板形蛍光ランプやEL(エレクトロルミネセンス)などの面状光源をそのまま使用するものである。
【0005】
図7は、反射板方式のバックライトを備えたLCDモジュールの断面を示す。Pは液晶パネル、Lはバックライトであり、このバックライトLは内面が反射面を成す筺体Cの内側に発光体Eをおき、筺体Cの前方開口部に発光面を成す光拡散板Dを設けて構成される。
【0006】
又、図8は導光体方式のバックライトを備えたLCDモジュールの例であり、そのバックライトLは内面が反射面を成す筺体C内にアクリルなどで成る導光板Tを収容して構成される。又、筺体C内には導光板Tの両端面に臨む発光体Eが収容され、導光板Tの前面には光拡散板Dを介して液晶パネルPが配置される。
【0007】
【発明が解決しようとする課題】
然し乍ら、上記従来の液晶表示装置(LCD)は、液晶パネルの裏側から照明光を照射するにすぎず、表示画面は文字通り平面的で奥行き感はなく、全体として際立った視覚的効果のない見栄えを欠くものであった。
【0008】
本発明は以上のような事情に鑑みて成されたものであり、その目的は表示画面に奥行き感がある視覚的効果の高い液晶表示装置を提供することにある。
【0009】
【課題を解決するための手段】
本発明は上記目的を達成するため、液晶パネル1より面積の大きな発光面(光拡散板14)をもつバックライト2と、その発光面(光拡散板14)に対向するフロントパネル6との間に、前記液晶パネル1を介在せしめて成る液晶表示装置であって、前記フロントパネル6は透光性を有して前記液晶パネル1が対向する位置に窓部10を形成し、該フロントパネル6の側縁部には前記バックライト2の発光面(光拡散板14)と異色の光を放つ発光体7が配置されると共に、前記フロントパネル6には前記発光体7からの入射光を前記液晶パネル1の位置する側とは反対側に放射するための集光溝9が並列状に形成されて成ることを特徴とする。
【0010】
【発明の実施の形態】
以下、本発明の適用例を図面に基づいて詳細に説明する。先ず、図1は本発明に係る液晶表示装置の好適な一例を示した斜視図である。1は液晶パネルであり、これにはTN形、IPS形、GH形、ECB形、高分子分散形、強誘電性形などが用いられる。2は液晶パネルの裏側に設けられる反射板方式のバックライトであり、これは液晶パネル1を保持するプラスチック製の筺体3を基材として、その両側面に取り付けられる回路基板4、及びこの回路基板に実装される発光体5(本例において点光源を成すLED)などから構成される。尚、発光体5には赤色LED、青色LED、黄色LED、橙色LED、又は緑色LEDなどを用いることができるが、これに代えて白色電球や蛍光管などを用いても良い。
【0011】
一方、6はアクリルやポリカーボネートといった透明乃至は半透明材料から成る透光性を有したフロントパネルであり、これは液晶パネル1を介して筺体3の前部に取り付けられ、その両側縁部には回路基板4に実装した発光体7が配置される。特に、フロントパネル6の両側には凹部8が形成され、その凹部8に発光体7が入れ込まれるようにしてある。又、フロントパネル6の前面には、上下方向に延びるV字形の集光溝9が左右方向に所定の間隔で並列状に形成され、液晶パネル1が対向する位置にはこれを露呈するための窓部10が開口される。尚、発光体7はバックライト用光源である発光体5とは異色の光を放つ発光ダイオード(LED)であり、これは窓部10よりも上下の位置にあって片側に二つずつ設けられる。
【0012】
次に、図2は図1におけるA−A断面を示す。この図で明らかなように、筺体3は円弧状の背面板3Aとその両側に設けられる側面板3Bと有し、その側面板3Bには発光体5を納入するための切欠孔11が形成される。特に、この筺体3は白色のプラスチックで成り、その内面は発光体5の放射光を反射する反射面12とされる。
【0013】
又、筺体3の前方部分は放光口13として全開口され、その放光口13に液晶パネル1よりも面積の大きな発光面を成す光拡散板14が設けられる。光拡散板14は乳白色の半透明なプラスチックフィルムで成り、その周縁は筺体3により支持される。そして、その種の光拡散板14をもつバックライト2によれば、光拡散板14と対向する筺体の背面板3Aが円弧状の反射面12を形成するために、発光体5の放射光が背面板3Aにより効率よく反射され、その反射光が光拡散板14の全面に入射して拡散される。よって、光拡散板14は発光体5を光源として該発光体と同色でその全面がムラ無く一様に発光し、この発光面(光拡散板14)からの放射光が対向する液晶パネル1の裏面全体に照射される。又、液晶パネル1と非対向の部分で光拡散板14を透過した光は、これに対向するフロントパネル6に入射する。
【0014】
尚、フロントパネル6の裏面は光拡散面15とされる。本例において、その光拡散面15は発光面を成す光拡散板14と同種のプラスチックフィルムをフロントパネル6の裏面に密着せしめて成るが、これに代えてフロントパネル6の裏面に薬剤による化学的加工やサンドブラストなどの物理的加工を施して光拡散性をもつ微細な凹凸を形成するようにしてもよい。又、図2において、16はフロントパネルを支持する固定脚、17は液晶パネルを支持する固定脚であり、それらは光拡散板14を貫通し、その各先端が光拡散板14より前方に突出される。
【0015】
図3で明らかなように、それらは固定脚は筺体内に4本ずつ立てられ、このうち液晶パネル用固定脚17の外側にはこれに沿って円形の支柱18が形成され、この支柱18により後述するパネル枠が固定されるようにしてある。
【0016】
図4は図1におけるB−B断面であり、19は上記のパネル枠を示す。この図で明らかなように、パネル枠19は固定脚17上に置かれた液晶パネル1の周縁を押さえ付けるものであり、これは発光面を成す光拡散板14からフロントパネル6に入射する光を遮らぬよう透明材料で形成される。又、図4から明らかなように、フロントパネル6は左右両側より中央部分が前方に迫り出した曲面状を成し、その中央部分に形成した窓部10がバックライト2との間に介在される液晶パネル1から離隔した位置に開口するようにしてある。これにより、表示画面を成す液晶パネル1には奥行き感が与えられる。
【0017】
そして、以上のような液晶表示装置は、図5に示すようCDプレーヤやカセットテープデッキといったオーディオをはじめ、各種電気機器の前面操作部20からフロントパネル6が突出する状態に装着され、種々の情報を液晶パネル1に表示することができる。
【0018】
以下、係る液晶表示装置の作用を説明すれば、筺体3内では発光体5が発光し、その放射光が筺体3の内面で反射され、その反射光が光拡散板14により拡散される。このため、発光体5として例えば青色LEDが用いられると、光拡散板14は発光体5の放射光を全面に受けてこれと同じ青色に発光する。そして、その青色光は光拡散板14で拡散されつつこれを透過し、液晶パネル1の裏面全体からこれを照射する。よって、液晶パネル1に表示された情報を外部からフロントパネルの窓部10を通して視認することができる。又、液晶パネル1から外れた位置で光拡散板14を透過した光(青色光)は、この光拡散板14に対向するフロントパネル6に入射し、その内部を裏面から前面に向かって透過する。よって、フロントパネル6の前面も発光体5と同色で発光する。
【0019】
一方、発光体7の放射光は、図6のようにフロントパネル6の側面よりその内部に入射し、光拡散面15で拡散されつつフロントパネル6内を進行する。そして、V字形を成す集光溝9の部分で反射・屈折を繰り返して集光溝9の部分から外部前方(液晶パネル1の位置する側とは反対側)に向けて放射する。よって、発光体7の放射光(例えば赤色光)は、発光面(光拡散板14)からの到達光と重合することなく集光溝9の部分だけを同色で高輝度に光らし、発光面を成す光拡散板14からの到達光は集光溝9以外の部分でフロントパネル6を発光体5の放射光と同色に光らせる。
【0020】
このように、フロントパネル6が液晶パネル1の周囲で二色に光ることから全体が際立って美観を奏し、そのイルミネーション効果によって液晶パネル1も引き立つようになる。
【0021】
以上、本発明について説明したが、係る液晶表示装置は上記例に限らず、フロントパネル6を平面状にしたり、これに形成する集光溝9をV字形ほか、U字形などにしてもよい。
【0022】
又、バックライトは以上のような反射板方式にすることより低コストで大きな発光面を得られるため好ましいが、これに代えて筺体内に透明材料で成る導光板を収容し、その前面に発光面を成す光拡散板を設けると共に、導光板の端面に発光体を臨ませて導光体方式のバックライトとしたり、又は冷陰極平板形蛍光ランプやELといった面状光源を利用したバックライトとし、その面状光源の前面を液晶パネルより面積の大きな発光面として液晶パネルやフロントパネルに対向させるようにしてもよい。
【0023】
【発明の効果】
以上の説明から明らかなように、本発明によれば液晶パネルより面積の大きな発光面をもつバックライトと、その発光面に対向するフロントパネルとの間に液晶パネルを介在せしめ、その液晶パネルが対向する位置でフロントパネルに窓部を形成していることから、表示画面に奥行き感を与えることができる。
【0024】
特に、フロントパネルが透光性を有することから、これを発光面からの入射光で同色に光らすことができ、しかもフロントパネルの側縁部にバックライトの発光面と異色の光を放つ発光体が配置され、フロントパネルにはその発光体から入射した光を前方に放射するための集光溝が並列状に形成されることから、集光溝の部分を発光面と異なる光色で光らすことができる。このため、全体的として際立った美観が得られ、そのイルミネーション効果により液晶パネルを引き立たせることができる。
【図面の簡単な説明】
【図1】本発明に係る液晶表示装置を示した斜視図
【図2】図1におけるA−A断面図
【図3】バックライトを構成する筺体を示した平面図
【図4】図1におけるB−B断面図
【図5】本発明に係る液晶表示装置の使用態様を示した概略図
【図6】フロントパネルの部分拡大図
【図7】従来の液晶表示装置を示した断面概略図
【図8】従来の液晶表示装置を示した断面概略図
【符号の説明】
1 液晶パネル
2 バックライト
3 筺体
4 回路基板
5 発光体(バックライト用光源)
6 フロントパネル
9 集光溝
10 窓部
14 光拡散板(発光面)
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid crystal display device used for an audio device and other electric devices, and more particularly to a liquid crystal display device having an illumination effect that has a sense of depth in a display screen and makes it stand out.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a thin and light liquid crystal display (LCD) that consumes less power has been widely used as a display device installed in an audio device or the like. The LCD has an electrical addressing method, a thermal addressing method, and an optical addressing method. Of these, the electrical addressing method is roughly divided into a segment electrode driving method and a matrix electrode driving method depending on the difference in electrode configuration. Further, the former is classified into static driving and dynamic driving, and the latter is classified into passive matrix (PM) driving and active matrix (AM) driving according to the difference in the electric addressing method.
[0003]
In particular, TFT-driven AM-LCDs using thin transistors such as a-Si and p-Si types have excellent display performance such as contrast and response, but the liquid crystal panel itself does not emit light in any LCD, so external illumination light Need. Among them, there are reflective liquid crystal panels that use natural light as external illumination light, as seen in MIN (metal-insulator-metal) type AM-LCDs, but transmission type is the mainstream that requires brightness and image quality. It is. For this reason, many LCDs have a backlight on the back side of the liquid crystal panel.
[0004]
There are roughly three types of backlights: a reflector plate method (directly below method), a light guide method (edge light method), and a planar light source method. Among these, the reflector type is a surface light source in which a fluorescent lamp or the like is housed in an optical housing composed of a reflector and a diffuser, and the emitted light is reflected and diffused. In the light guide system, the light emitted from a light emitter such as a fluorescent lamp is incident from the side of a light guide plate such as acrylic or polycarbonate, and the incident light is reflected multiple times within the light guide plate to form a surface light source. The planar light source method uses a planar light source such as a cold cathode flat fluorescent lamp or EL (electroluminescence) as it is.
[0005]
FIG. 7 shows a cross section of an LCD module having a reflector type backlight. P is a liquid crystal panel, L 1 is the backlight, the backlight L 1 is the inner surface of every light emitter E 1 on the inside of the casing C 1 forming the reflecting surface forms a light emitting surface in front opening of the casing C 1 It constituted by providing a light diffusion plate D 1.
[0006]
FIG. 8 shows an example of an LCD module having a light guide type backlight. The backlight L 2 accommodates a light guide plate T made of acrylic or the like in a casing C 2 whose inner surface forms a reflective surface. Composed. In addition, a light emitter E 2 facing both end surfaces of the light guide plate T is accommodated in the housing C 2 , and a liquid crystal panel P is disposed on the front surface of the light guide plate T via a light diffusion plate D 2 .
[0007]
[Problems to be solved by the invention]
However, the above-mentioned conventional liquid crystal display device (LCD) only illuminates illumination light from the back side of the liquid crystal panel, and the display screen is literally flat and has no sense of depth, and as a whole it has a distinct visual effect. It was lacking.
[0008]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a liquid crystal display device with a high visual effect in which a display screen has a sense of depth.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a backlight 2 having a light emitting surface (light diffusing plate 14) having a larger area than the liquid crystal panel 1 and a front panel 6 facing the light emitting surface (light diffusing plate 14). In addition, the liquid crystal display device includes the liquid crystal panel 1, wherein the front panel 6 has translucency and a window portion 10 is formed at a position facing the liquid crystal panel 1. A light emitter 7 that emits light of a different color from the light emitting surface (light diffusing plate 14) of the backlight 2 is disposed on the side edge of the backlight 2, and incident light from the light emitter 7 is incident on the front panel 6. A condensing groove 9 for radiating to the side opposite to the side where the liquid crystal panel 1 is located is formed in parallel.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, application examples of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a preferred example of a liquid crystal display device according to the present invention. Reference numeral 1 denotes a liquid crystal panel, for which a TN type, an IPS type, a GH type, an ECB type, a polymer dispersion type, a ferroelectric type, or the like is used. Reference numeral 2 denotes a reflector-type backlight provided on the back side of the liquid crystal panel, which includes a circuit board 4 attached to both side surfaces of a plastic housing 3 that holds the liquid crystal panel 1 as a base material, and the circuit board. The light-emitting body 5 (LED which constitutes a point light source in this example) mounted on the board. In addition, although red LED, blue LED, yellow LED, orange LED, green LED, etc. can be used for the light-emitting body 5, it replaces with this and a white light bulb, a fluorescent tube, etc. may be used.
[0011]
On the other hand, 6 is a translucent front panel made of a transparent or translucent material such as acrylic or polycarbonate, which is attached to the front part of the housing 3 via the liquid crystal panel 1 and on both side edges thereof. A light emitter 7 mounted on the circuit board 4 is disposed. In particular, a recess 8 is formed on both sides of the front panel 6, and the light emitter 7 is inserted into the recess 8. Further, V-shaped condensing grooves 9 extending in the vertical direction are formed in parallel on the front surface of the front panel 6 at predetermined intervals in the left-right direction so that the liquid crystal panel 1 is exposed at a position facing it. The window 10 is opened. The light emitting body 7 is a light emitting diode (LED) that emits light of a different color from the light emitting body 5 that is a light source for the backlight, and is provided above and below the window portion 10 and is provided two on each side. .
[0012]
Next, FIG. 2 shows an AA cross section in FIG. As is apparent from this figure, the housing 3 has an arcuate back plate 3A and side plates 3B provided on both sides thereof, and the side plate 3B is formed with a notch 11 for delivering the light emitter 5. The In particular, the housing 3 is made of white plastic, and its inner surface is a reflecting surface 12 that reflects the emitted light of the light emitter 5.
[0013]
Further, the front portion of the housing 3 is fully opened as a light emission port 13, and a light diffusion plate 14 having a light emitting surface larger in area than the liquid crystal panel 1 is provided in the light emission port 13. The light diffusion plate 14 is made of a milky white translucent plastic film, and the periphery thereof is supported by the housing 3. According to the backlight 2 having such a light diffusing plate 14, the back plate 3 </ b> A of the casing facing the light diffusing plate 14 forms the arc-shaped reflecting surface 12. The light is efficiently reflected by the back plate 3A, and the reflected light enters the entire surface of the light diffusion plate 14 and is diffused. Therefore, the light diffusing plate 14 uses the illuminator 5 as a light source and emits light uniformly with the same color as the illuminant, and the light emitted from the light emitting surface (light diffusing plate 14) is opposed to the liquid crystal panel 1. The entire back surface is irradiated. The light transmitted through the light diffusing plate 14 at a portion not facing the liquid crystal panel 1 is incident on the front panel 6 facing this.
[0014]
The back surface of the front panel 6 is a light diffusion surface 15. In this example, the light diffusing surface 15 is formed by adhering a plastic film of the same type as the light diffusing plate 14 forming the light emitting surface to the back surface of the front panel 6. You may make it form the fine unevenness | corrugation which has light diffusivity by giving physical processing, such as a process and sandblasting. In FIG. 2, 16 is a fixed leg for supporting the front panel, and 17 is a fixed leg for supporting the liquid crystal panel, which penetrates the light diffusing plate 14, and each tip projects forward from the light diffusing plate 14. Is done.
[0015]
As is apparent from FIG. 3, four fixed legs are erected in the housing, and a circular column 18 is formed on the outside of the fixed leg 17 for the liquid crystal panel. A panel frame to be described later is fixed.
[0016]
FIG. 4 is a cross-sectional view taken along the line BB in FIG. 1, and 19 indicates the panel frame. As is clear from this figure, the panel frame 19 presses the periphery of the liquid crystal panel 1 placed on the fixed leg 17, and this is the light incident on the front panel 6 from the light diffusing plate 14 forming the light emitting surface. It is made of a transparent material so as not to obstruct. As is clear from FIG. 4, the front panel 6 has a curved shape in which the central portion protrudes forward from the left and right sides, and a window 10 formed in the central portion is interposed between the backlight 2 and the front panel 6. The liquid crystal panel 1 is opened at a position separated from the liquid crystal panel 1. Thereby, a sense of depth is given to the liquid crystal panel 1 constituting the display screen.
[0017]
The liquid crystal display device as described above is mounted in a state in which the front panel 6 protrudes from the front operation unit 20 of various electric devices including audio such as a CD player and a cassette tape deck as shown in FIG. Can be displayed on the liquid crystal panel 1.
[0018]
Hereinafter, the operation of the liquid crystal display device will be described. The light emitter 5 emits light in the housing 3, the emitted light is reflected by the inner surface of the housing 3, and the reflected light is diffused by the light diffusion plate 14. For this reason, when, for example, a blue LED is used as the light emitter 5, the light diffusing plate 14 receives the light emitted from the light emitter 5 over the entire surface and emits the same blue light. The blue light is transmitted through the light diffusion plate 14 while being diffused, and is irradiated from the entire back surface of the liquid crystal panel 1. Therefore, the information displayed on the liquid crystal panel 1 can be visually recognized from the outside through the window 10 of the front panel. The light (blue light) transmitted through the light diffusing plate 14 at a position off the liquid crystal panel 1 is incident on the front panel 6 facing the light diffusing plate 14 and passes through the interior from the back surface to the front surface. . Therefore, the front surface of the front panel 6 also emits light with the same color as the light emitter 5.
[0019]
On the other hand, the radiated light of the light emitter 7 enters the inside of the front panel 6 as shown in FIG. 6 and travels through the front panel 6 while being diffused by the light diffusion surface 15. Then, reflection and refraction are repeated at the portion of the light collecting groove 9 having a V-shape, and the light is emitted from the portion of the light collecting groove 9 toward the front outside (the side opposite to the side where the liquid crystal panel 1 is located). Therefore, the radiated light (for example, red light) of the illuminant 7 does not overlap with the light reaching from the light emitting surface (light diffusing plate 14), and only the portion of the light collecting groove 9 is illuminated with the same color and with high brightness, and the light emitting surface The light reaching the light diffusing plate 14 forming the light illuminates the front panel 6 in the same color as the radiated light of the light emitter 5 at a portion other than the light collecting groove 9.
[0020]
As described above, since the front panel 6 shines in two colors around the liquid crystal panel 1, the whole is conspicuously beautiful, and the liquid crystal panel 1 is also enhanced by the illumination effect.
[0021]
Although the present invention has been described above, the liquid crystal display device is not limited to the above example, and the front panel 6 may be planar, or the condensing groove 9 formed on the front panel 6 may be U-shaped or the like.
[0022]
In addition, the backlight is preferable because a large light-emitting surface can be obtained at a lower cost than by using the above-described reflecting plate method. However, instead of this, a light guide plate made of a transparent material is accommodated in the housing, and light is emitted on the front surface. A light diffusing plate is provided and a light-emitting body faces the end face of the light guide plate to make a light guide-type backlight, or a backlight using a planar light source such as a cold cathode flat fluorescent lamp or EL. The front surface of the planar light source may be opposed to the liquid crystal panel or the front panel as a light emitting surface having a larger area than the liquid crystal panel.
[0023]
【The invention's effect】
As is apparent from the above description, according to the present invention, a liquid crystal panel is interposed between a backlight having a light emitting surface having a larger area than the liquid crystal panel and a front panel facing the light emitting surface. Since the window portion is formed on the front panel at the facing position, a sense of depth can be given to the display screen.
[0024]
In particular, since the front panel has translucency, it can be illuminated with the same color by the incident light from the light emitting surface, and the light emitting body emits light of a different color from the light emitting surface of the backlight at the side edge of the front panel. And a condensing groove for radiating light incident from the light emitter forward is formed in parallel on the front panel, so that the condensing groove portion is illuminated with a light color different from that of the light emitting surface. Can do. For this reason, the outstanding aesthetics as a whole can be obtained, and the liquid crystal panel can be emphasized by the illumination effect.
[Brief description of the drawings]
1 is a perspective view showing a liquid crystal display device according to the present invention. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. FIG. 3 is a plan view showing a casing constituting a backlight. FIG. 5 is a schematic view showing how the liquid crystal display device according to the present invention is used. FIG. 6 is a partially enlarged view of a front panel. FIG. 7 is a schematic cross-sectional view showing a conventional liquid crystal display device. FIG. 8 is a schematic cross-sectional view showing a conventional liquid crystal display device.
DESCRIPTION OF SYMBOLS 1 Liquid crystal panel 2 Backlight 3 Housing 4 Circuit board 5 Luminescent body (light source for backlight)
6 Front panel 9 Light collecting groove 10 Window portion 14 Light diffusion plate (light emitting surface)

Claims (1)

液晶パネルより面積の大きな発光面をもつバックライトと、その発光面に対向するフロントパネルとの間に、前記液晶パネルを介在せしめて成る液晶表示装置であって、前記フロントパネルは透光性を有して前記液晶パネルが対向する位置に窓部を形成し、該フロントパネルの側縁部には前記バックライトの発光面と異色の光を放つ発光体が配置されると共に、前記フロントパネルには前記発光体からの入射光を前記液晶パネルの位置する側とは反対側に放射するための集光溝が並列状に形成されて成ることを特徴とする液晶表示装置。A liquid crystal display device in which the liquid crystal panel is interposed between a backlight having a light emitting surface having a larger area than the liquid crystal panel and a front panel facing the light emitting surface, and the front panel is light-transmitting. A window portion is formed at a position facing the liquid crystal panel, and a light emitter that emits light of a different color from the light emitting surface of the backlight is disposed on a side edge portion of the front panel. The liquid crystal display device is characterized in that light collecting grooves for emitting incident light from the light emitter to the side opposite to the side where the liquid crystal panel is located are formed in parallel.
JP2002309358A 2002-10-24 2002-10-24 Liquid crystal display Expired - Lifetime JP4081715B2 (en)

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JP2005347093A (en) * 2004-06-03 2005-12-15 Noriyuki Sumitomo Lighting device
JP2008235025A (en) * 2007-03-20 2008-10-02 Sumitomo Electric Printed Circuit Inc Light guide plate, input module and portable apparatus
KR101575906B1 (en) 2009-07-17 2015-12-08 엘지전자 주식회사 Display apparatus

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