JPS60252324A - Liquid crystal display device for vehicle - Google Patents
Liquid crystal display device for vehicleInfo
- Publication number
- JPS60252324A JPS60252324A JP59109190A JP10919084A JPS60252324A JP S60252324 A JPS60252324 A JP S60252324A JP 59109190 A JP59109190 A JP 59109190A JP 10919084 A JP10919084 A JP 10919084A JP S60252324 A JPS60252324 A JP S60252324A
- Authority
- JP
- Japan
- Prior art keywords
- light
- liquid crystal
- crystal panel
- prism
- incident
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 66
- 238000005286 illumination Methods 0.000 abstract description 2
- 230000003796 beauty Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Liquid Crystal (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Instrument Panels (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は液晶表示装置に係り、特に車両に採用するに適
した液晶表示装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid crystal display device, and particularly to a liquid crystal display device suitable for use in a vehicle.
従来、この種の液晶表示装置においては、例えば、車両
の走行速度等の通常情報を表示する通常情報パターン表
示部及び左折等の警告情報を表示する警告情報パターン
表示部を備えた液晶パネルを車両のインストルメントパ
ネルに配設し、板状プリズムを前記液晶パネルの裏面に
重合し、この液晶パネルの警告情報パターン表示部のう
ちの左折パターン表示部に対応する前記プリズムの部分
に貫通穴を形成するとともに同プリズムの裏面に反射面
(白色印刷・しぼ等による)を形成し、不透明基板をそ
の案内筒を前記プリズムの貫通穴に挿入するようにして
前記反射面に重合し、カラーレンズを前記反射面に重合
した状態にて前記案内筒内に装着し、主ランプを前記プ
リズムの側方に配設して、減光回路の非作動時には前記
主ランプから前記プリズム内にその側方から所定入射量
にて光を入射させ、前記減光回路の作動時には前記主ラ
ンプから前記プリズム内への光の入射量を前記所定入射
量よりも減少させ、補助ランプを前記案内筒の背後に配
設して、前記減光回路の非作動時或いは作動下における
左折表示時に前記補助ランプから前記案内筒及びカラー
レンズを通し前記液晶パネルの裏面に前記所定入射量に
て光を入射させるようにしたものがある。Conventionally, in this type of liquid crystal display device, for example, a liquid crystal panel equipped with a normal information pattern display section that displays normal information such as the traveling speed of the vehicle and a warning information pattern display section that displays warning information such as left turn, etc. A plate-like prism is superimposed on the back surface of the liquid crystal panel, and a through hole is formed in a portion of the prism corresponding to a left turn pattern display part of the warning information pattern display part of the liquid crystal panel. At the same time, a reflective surface (by white printing, graining, etc.) is formed on the back surface of the prism, and the opaque substrate is superimposed on the reflective surface by inserting its guide tube into the through hole of the prism, and the color lens is attached to the reflective surface. The main lamp is installed in the guide tube in a state where it overlaps the reflective surface, and the main lamp is arranged on the side of the prism, and when the dimming circuit is not activated, the main lamp is inserted into the prism from the side in a predetermined direction. The light is incident at an incident amount, and when the dimming circuit is activated, the amount of light incident from the main lamp into the prism is reduced from the predetermined incident amount, and an auxiliary lamp is disposed behind the guide tube. and when the dimmer circuit is not activated or when the left turn indication is activated, light is made to enter the back surface of the liquid crystal panel from the auxiliary lamp through the guide tube and the color lens at the predetermined incident amount. There is.
しかして、このような構成においては、前記液晶パネル
が、前記プリズムから前記所定入射量にて光を受けた状
態にて前記通常情報及び(又は)警告情報(左折情報を
除く)を前記通常情報パターン表示部及び(又は)警告
情報パターン表示部(左折パターン表示部を除く)にて
所定の明るさでもって表示し、前記プリズムから前記減
少入射量にて光を受けた状態にて前記所定の明るさより
も暗くして同様の表示を行い、また前記案内筒のカラー
レンズから前記所定入射量にて光を受けたとき前記減光
回路の作動非作動にかかわりなく前記左折パターン表示
部にて前記所定の明るさでもって左折表示する。In such a configuration, the liquid crystal panel converts the normal information and/or warning information (excluding left turn information) into the normal information while receiving light from the prism at the predetermined incident amount. The pattern display section and/or the warning information pattern display section (excluding the left turn pattern display section) are displayed at a predetermined brightness, and the predetermined information is displayed while receiving light from the prism at the reduced incident amount. A similar display is performed in a manner darker than the brightness, and when light is received at the predetermined incident amount from the color lens of the guide tube, the left turn pattern display section displays the above information regardless of whether the dimming circuit is activated or not. A left turn is displayed with a predetermined brightness.
しかしながら、このような液晶表示装置においては、前
記プリズム内に入射した光が、前記補助ランプの点灯・
非点灯にかかわりなく、前記案内筒により邪魔されて不
均一な状態にて前記プリズム内に分布するため、前記液
晶パネルの表示内容に明るい部分と暗い部分が生じ視認
性を阻害する。However, in such a liquid crystal display device, the light that enters the prism causes the auxiliary lamp to turn on and
Regardless of whether the light is lit or not, the light is obstructed by the guide tube and is distributed unevenly within the prism, so that bright and dark areas appear in the display content of the liquid crystal panel, impeding visibility.
また、前記主ランプの点灯下における前記補助ランプの
非点灯時には、前記案内筒の断面形状及びカラーレンズ
の陰が前記液晶パネルの左折パターン表示部にできてし
まい外観美を損ねる。Moreover, when the auxiliary lamp is not lit while the main lamp is lit, the cross-sectional shape of the guide tube and the shade of the color lens are formed in the left turn pattern display section of the liquid crystal panel, detracting from the appearance.
本発明はこのようなことに対処してなされたもので、そ
の目的とするところは、車両用液晶表示装置において、
その液晶パネルの表示面全体の明るさを出来る限り一様
にするとともに当該表示面全体の外観美を向上させるよ
うにしたことにある。The present invention has been made in response to the above-mentioned problems, and its purpose is to provide a liquid crystal display device for a vehicle.
The purpose is to make the brightness of the entire display surface of the liquid crystal panel as uniform as possible and to improve the appearance of the entire display surface.
かかる目的を達成するにあたり、本発明の構成上の特徴
は、車両のインストルメントパネルに配設されて当該車
両に関する通常情報及び警告情報をそれぞれ表示する第
1及び第2のパターン表示部を有してなる液晶パネルと
、この液晶パネルの裏面に重合した導光板と、この導光
板の側方に配設されて減光U路の非作動時には前記導光
板内にその側方から所定入射量にて光を入射させ、前記
減光回路の作動時には前記導光板への光の入射量を前記
所定入射量から減少させる光源と、前記導光板の裏面に
重合されてこの導光板に入射した光を同導光板内にて前
記液晶パネルの裏面に向けて反射する反射板とを備えて
、前記液晶パネルが前記導光板からの前記所定入射量又
はその減少入射量の光を受けて前記第1及び(又は)第
2のパターン表示部にて前記通常情報及び(又は)!青
情報を表示するようにした液晶表示装置において、前記
液晶パネルの前記第2パターン表示部の背後に対応する
前記反射板の部分に貫通孔を設けるとともに、この貫通
孔の背後に補助光源を配設して、前記減光回路の作動下
における前記液晶パネルの警告情報表示時に前記補助光
源から前記導光板内に前記貫通孔を通し光を入射させる
ようにしたことにある。In achieving this object, the present invention has a structural feature that includes first and second pattern display sections that are disposed on an instrument panel of a vehicle and display normal information and warning information regarding the vehicle, respectively. A liquid crystal panel consisting of a liquid crystal panel, a light guide plate superimposed on the back surface of the liquid crystal panel, and a light guide plate disposed on the side of the light guide plate, and when the dimming U path is not activated, a predetermined amount of light enters the light guide plate from the side. a light source that allows light to enter the light guide plate and reduces the amount of light incident on the light guide plate from the predetermined amount of light when the light attenuation circuit is activated; a reflector that reflects toward the back surface of the liquid crystal panel within the light guide plate, the liquid crystal panel receiving the predetermined incident amount or the reduced incident amount of light from the light guide plate; (or) The normal information and (or) ! on the second pattern display section. In the liquid crystal display device configured to display blue information, a through hole is provided in a portion of the reflective plate corresponding to the back of the second pattern display section of the liquid crystal panel, and an auxiliary light source is arranged behind the through hole. and when the warning information is displayed on the liquid crystal panel under the operation of the dimming circuit, light is made to enter the light guide plate from the auxiliary light source through the through hole.
しかして、このように構成した本発明においては、上述
のごとく、前記反射板にのみ前記貫通穴を設けるととも
にこの貫通穴の背後に前記補助光源を配設するようにし
たので、前記光源から前記導光板内に入射した光が同導
光板内′の全体に亘り一様に分布して前記液晶パネルの
裏面に入射することとなり、その結果前記液晶パネルが
その表示面全体に亘り常に一様な明るさを確保し得てそ
の視認性の向上につながる。また、上述のごとく、前記
補助光源が前記反射板の貫通孔の背後に位置しているの
で、前記液晶パネルの表示面に前記導光板を通して非発
光時の前記補助光源の形状或いは前記貫通孔の形状等の
望ましくない陰ができることがなく、前記液晶パネルの
表示面の外観美の向上につながるJ・
〔実施例〕
以下、本発明の一実施例を図面により説明すると、第1
図及び第2図は本発明に係る車両用液晶表示装置の一例
を示しており、この液晶表示装置は当該車両の車室内に
おけるインストルメントパネル(図示せず)に組付けら
れている。液晶表示装置は、前記インストルメントパネ
ル内に固着したカバー10を有しており、このカバー1
0には液晶パネル20がその表示面21をカバー10の
開口11を通し前記車室内に臨ませて装着されている。Therefore, in the present invention configured in this manner, as described above, the through hole is provided only in the reflecting plate, and the auxiliary light source is disposed behind the through hole, so that the light source is connected to the light source. The light incident on the light guide plate is uniformly distributed throughout the light guide plate and is incident on the back surface of the liquid crystal panel, and as a result, the liquid crystal panel always displays a uniform display over its entire display surface. This ensures brightness and improves visibility. Further, as described above, since the auxiliary light source is located behind the through hole of the reflection plate, the shape of the auxiliary light source when not emitting light or the shape of the through hole can be changed by passing the light guide plate onto the display surface of the liquid crystal panel. [Example] Hereinafter, an example of the present invention will be described with reference to the drawings.
1 and 2 show an example of a liquid crystal display device for a vehicle according to the present invention, and this liquid crystal display device is assembled into an instrument panel (not shown) in the cabin of the vehicle. The liquid crystal display device has a cover 10 fixed inside the instrument panel, and this cover 1
A liquid crystal panel 20 is mounted on the vehicle with its display surface 21 facing into the vehicle interior through the opening 11 of the cover 10.
液晶パネル20は、左折パターン表示部21a、右折パ
ターン表示部21b、走行速度パターン表示部21c、
残量パターン表示部21d及び温度パターン表示部21
eを有しており、後述する板状プリズム30から光を受
けて各表示部218〜21eにて当該車両の左折表示、
右折表示、走行速度表示、燃料の残量表示及びエンジン
の温度表示を選択的に(或いは共に)行なう。The liquid crystal panel 20 includes a left turn pattern display section 21a, a right turn pattern display section 21b, a travel speed pattern display section 21c,
Remaining amount pattern display section 21d and temperature pattern display section 21
e, and each display section 218 to 21e receives light from a plate prism 30, which will be described later, to display a left turn indication for the vehicle.
A right turn display, a traveling speed display, a remaining fuel amount display, and an engine temperature display are selectively (or both) displayed.
プリズム30は、不透明なコ形状の枠板40 (前記イ
ンストルメントパネルに固着しである)内に装着されて
液晶パネル20の裏面22に重合してなるもので、この
プリズム30の裏面には、枠板400貫通孔41に対応
する部分を除き、反射面31が白色印刷或いはしぼによ
り形成されている。このプリズム30の一側32の近傍
にはランプ50がその基部をプリント基板60の一側6
1に嵌着して配設されており、このランプ50はその点
灯によりプリズム30内にその一側32から光を入射さ
せる。このことは、ランプ50からプリズム30内に入
射した光が反射面31によりプリズム30内にて拡散反
射されて液晶パネル20の裏面22全体に亘り一様に分
布して入射することを意味する。但し、ランプ50は液
晶表示装置の減光回路の非作動時には第1所定光量にて
発光し、前記減光回路の作動時には第2所定光量(前記
第1所定光量より少ない)にて発光するようになってい
る。なお、前記減光回路は当該車両の昼間走行時に非作
動となり当該車両のトンネル内走行時或いは夜間走行時
に作動する。また、第1図にて符号62はプリント基板
60を支持するロンドを示す。The prism 30 is mounted inside an opaque U-shaped frame plate 40 (fixed to the instrument panel) and superimposed on the back surface 22 of the liquid crystal panel 20. On the back surface of the prism 30, The reflective surface 31 is formed by white printing or graining except for the portion corresponding to the through hole 41 of the frame plate 400. Near one side 32 of this prism 30, a lamp 50 has its base connected to one side 6 of a printed circuit board 60.
When the lamp 50 is turned on, light enters the prism 30 from one side 32 thereof. This means that the light that enters the prism 30 from the lamp 50 is diffusely reflected within the prism 30 by the reflective surface 31 and is uniformly distributed over the entire back surface 22 of the liquid crystal panel 20 and enters the prism 30 . However, the lamp 50 emits light at a first predetermined amount of light when the dimming circuit of the liquid crystal display device is not activated, and emits light at a second predetermined amount of light (less than the first predetermined amount of light) when the dimming circuit is activated. It has become. The dimming circuit is inactive when the vehicle is running during the day, and is activated when the vehicle is running in a tunnel or at night. Further, in FIG. 1, reference numeral 62 indicates a rond supporting the printed circuit board 60. As shown in FIG.
枠板40の貫通孔41は第2図に示すごとく四角形状に
て液晶パネル20の左折パターン表示部21’aに対応
する位置にて形成されており、この貫通孔41の内周は
、第2図から容易に理解されるごとく、左折パターン表
示部21aの輪郭の外側にある。また、枠板40には、
貫通孔41を通しプリズム30の裏面に直接開口する案
内筒42が、プリント基板60を通し第1図にて図示左
方に延出するように一体的に形成されており、この案内
筒42の図示下端には、ランプ70が案内筒42の下部
内に挿入されて、その基部にてプリント基板70(前記
インストルメントパネルに固着されている)の中間部位
に嵌着されている。しかかして、ランプ70は前記減光
回路の作動下における液晶パネル20の左折パターン表
示部21aによる当該車両の左折表示時にのみ点灯して
前記第1所定光量にて案内筒42、貫通孔41及びプリ
ズム30を通し左折パターン表示部21aに対応する液
晶パネル20の裏面22の部分に光を入射させる。As shown in FIG. 2, the through hole 41 of the frame plate 40 has a rectangular shape and is formed at a position corresponding to the left turn pattern display section 21'a of the liquid crystal panel 20. As can be easily understood from FIG. 2, it is located outside the outline of the left turn pattern display section 21a. In addition, the frame board 40 includes
A guide tube 42 that opens directly to the back surface of the prism 30 through the through hole 41 is integrally formed so as to extend to the left in FIG. 1 through the printed circuit board 60. At the lower end in the figure, a lamp 70 is inserted into the lower part of the guide tube 42, and its base is fitted into an intermediate portion of a printed circuit board 70 (fixed to the instrument panel). Thus, the lamp 70 is turned on only when the left turn pattern display section 21a of the liquid crystal panel 20 indicates a left turn of the vehicle under the operation of the dimming circuit, and the lamp 70 illuminates the guide tube 42, the through hole 41, and the like with the first predetermined light amount. Light is made to pass through the prism 30 and enter a portion of the back surface 22 of the liquid crystal panel 20 corresponding to the left turn pattern display section 21a.
以上のように構成した本実施例において、当該車両の中
間走行時には前記減光回路が非作動にあるため、ランプ
50がその点灯により前記第1所定光量にてプリズム3
0内にその一側32から光を入射させ、プリズム30が
かかる入射光をその内部全体に亘り反射面31の拡散反
射作用のもとに一様に分布させて液晶パネル20の裏面
22の全体に亘り入射させる。これにより、液晶パネル
20の各パターン表示部21a〜21eによる非表示時
における表示面21がその全体に亘り前記第1所定光量
に対応する一様の明るさに常に維持される。従って、液
晶パネル20がその各パターン表示部21a〜zteに
て当該車両の走行速度、左折、右折、燃料の残量、エン
ジンの温度を表示したとき、これら各表示内容を一様な
コントラストのもとに明確に視認できる。In this embodiment configured as described above, since the dimming circuit is inactive when the vehicle is in intermediate running, the lamp 50 is turned on to illuminate the prism 3 with the first predetermined light amount.
0 from one side 32 of the liquid crystal panel 20, and the prism 30 uniformly distributes the incident light throughout its interior under the diffuse reflection effect of the reflective surface 31, thereby covering the entire back surface 22 of the liquid crystal panel 20. It is made incident over a period of time. Thereby, when the pattern display sections 21a to 21e of the liquid crystal panel 20 are not displaying, the entire display surface 21 is always maintained at a uniform brightness corresponding to the first predetermined light amount. Therefore, when the liquid crystal panel 20 displays the traveling speed, left turn, right turn, remaining fuel level, and engine temperature of the vehicle in each pattern display section 21a to zte, these display contents are displayed with uniform contrast. clearly visible.
また、当該車両の夜間走行時或いはトンネル内走行時に
は前記減光回路の作動のもとにランプ50が前記第2所
定光量にてプリズム30内にその一側32から光を入射
させ、プリズム30がかかる入射光を上述と同様に一様
に分布させて液晶パネル20の裏面22の全体に亘り入
射させる。これにより、液晶パネル20の各パターン表
示部21a〜21eによる非表示時における表示面21
がその全体に亘り前記第2所定光量に対応する明るさく
即ち、前記第1所定光量に対応する明るさよりも暗い明
るさ)に常に維持され得る。従って、液晶パネル20の
パターン表示部21Cによる走行速度表示が一様なコン
トラストのもとに明確に視認できる。かかる場合、液晶
パネル20のパターン表示部21aによる左折表示時に
は、ランプ70がその点灯により前記第1所定光量にて
枠板40の案内筒42、貫通孔41及びプリズム30を
通し液晶パネル20のパターン表基部21aに光を入射
させるので、このパターン表示部2]aによる表示内容
を、表示面21に対する上述の減光照明にもかかわらず
、前記第1所定光量に対応する明るさにて明確に視認で
きる。Further, when the vehicle is running at night or in a tunnel, the lamp 50 causes light to enter the prism 30 from one side 32 at the second predetermined light intensity under the operation of the dimming circuit, and the prism 30 The incident light is uniformly distributed in the same manner as described above and is made to be incident over the entire back surface 22 of the liquid crystal panel 20. As a result, the display surface 21 when each pattern display section 21a to 21e of the liquid crystal panel 20 is not displaying information.
can always be maintained at a brightness corresponding to the second predetermined light amount, that is, a brightness darker than the brightness corresponding to the first predetermined light amount. Therefore, the traveling speed displayed by the pattern display section 21C of the liquid crystal panel 20 can be clearly viewed with uniform contrast. In such a case, when the pattern display section 21a of the liquid crystal panel 20 indicates a left turn, the lamp 70 illuminates to display the pattern on the liquid crystal panel 20 through the guide cylinder 42, through hole 41 and prism 30 of the frame plate 40 with the first predetermined amount of light. Since light is incident on the table base 21a, the display contents by the pattern display section 2]a can be clearly displayed at a brightness corresponding to the first predetermined light amount, despite the above-mentioned dimmed illumination for the display surface 21. Visible.
また、枠板40の貫通孔41、案内筒42及びランプ7
0が、上述のごとく、プリズム3oにより液晶パネル2
0から隔離されているので、前記減光回路の作動・非作
動にかかわりなく、ランプ70の非点灯時における外形
形状、枠板4oの貫通孔41の形状等が液晶パネル2o
の表示面21に陰として形成されることがなく、液晶パ
ネル20の表示面21の外観美及び視認性の向上に役立
つ。In addition, the through hole 41 of the frame plate 40, the guide tube 42, and the lamp 7
0 is displayed on the liquid crystal panel 2 by the prism 3o as described above.
0, the external shape of the lamp 70 when it is not lit, the shape of the through hole 41 of the frame plate 4o, etc. will be the same as that of the liquid crystal panel 2o, regardless of whether the dimming circuit is activated or not.
The shadows are not formed on the display surface 21 of the liquid crystal panel 20, which helps improve the appearance and visibility of the display surface 21 of the liquid crystal panel 20.
なお、前記実施例においては、液晶パネル2゜の左折パ
ターン表示部21aに対応する枠板4゜の部分に貫通孔
41、案内筒42及びう・ンプ7゜を設けるようにした
が、これに限らず、液晶パネル20の右折パターン表示
部21b、残量パターン表示部21C1温度パターン表
示部21e、その他各種の警告情報パターン表示部に対
応する枠板40の部分にもそれぞれ1通孔、案内筒及び
ランプを設けて実施しても前記実施例と同様の作用効果
を達成し得る。In the above embodiment, the through hole 41, the guide tube 42, and the 7° angle of the opening were provided in the portion of the frame plate 4° corresponding to the left turn pattern display section 21a of the liquid crystal panel 2°. Not only the right turn pattern display section 21b of the liquid crystal panel 20, the remaining amount pattern display section 21C1, the temperature pattern display section 21e, and the parts of the frame plate 40 corresponding to various other warning information pattern display sections also have one through hole and a guide tube. Even if a lamp is provided, the same effects as in the above embodiment can be achieved.
第1図は本発明装置の要部断面図、及び第2図は同正面
図である。
符号の説明
20・・・液晶パネル、30・・・プリズム、31・・
・反射面、40・・・枠板、41・・・貫通孔、50.
70・・・ランプ。
出願人 日本電装株式会社
代理人 弁理士 長 谷 照 −
第1J!1
第21!I
n
20 2ノFIG. 1 is a sectional view of a main part of the apparatus of the present invention, and FIG. 2 is a front view thereof. Explanation of symbols 20...Liquid crystal panel, 30...Prism, 31...
- Reflective surface, 40... Frame plate, 41... Through hole, 50.
70...Lamp. Applicant Nippondenso Co., Ltd. Agent Patent Attorney Teru Hase - 1st J! 1 21st! I n 20 2 no
Claims (1)
関する通常情報及び警告情報をそれぞれ表示する第1及
び第2のパターン表示部を有してなる液晶パネルと、こ
の液晶パネルの裏面に重合した導光板と、この導光板の
側方に配設されて減光回路の非作動時には前記導光板内
にその側方から所定入射量にて光牽入射させ、前記減光
回路の作動時には前記導光板への光の入射量を前記所定
入射量から減少させる光源と、前記導光板の裏面に重合
されてこの導光板に入射した光を同導光板内にて前記液
晶パネルの裏面に向けて反射する反射板とを備えて、前
記液晶パネルが前記導光板からの前記所定入射量又はそ
の減少入射量の光を受けて前記第1及び(又は)第2の
パターン表示部にて前記通常情報及びく又は)警告情報
を表示するようにした液晶表示装置において、前記液晶
パネルの前記第2パターン表示部の背後に対応する前記
反射板の部分に貫通孔を設けるとともに、この貫通孔の
背後に補助光源を配設して、前記減光回路の作動下にお
ける前記液晶パネルの警告情報表示時に前記補助光源か
ら前記導光板内に前記貫通孔を通し光を入射させるよう
にしたことを特徴とする車両用液晶表示装置。A liquid crystal panel disposed on an instrument panel of a vehicle and having first and second pattern display sections that respectively display normal information and warning information regarding the vehicle; and a light guide plate superimposed on the back surface of the liquid crystal panel. and is disposed on the side of the light guide plate, so that when the light attenuation circuit is not in operation, light is drawn into the light guide plate from the side at a predetermined amount of incidence, and when the light attenuation circuit is in operation, it is directed into the light guide plate. a light source that reduces the incident amount of light from the predetermined incident amount; and a light source that is superimposed on the back surface of the light guide plate and reflects the light that is incident on the light guide plate toward the back surface of the liquid crystal panel within the light guide plate. the liquid crystal panel receives the predetermined amount of incident light or its reduced amount of light from the light guide plate, and displays the normal information and/or information on the first and/or second pattern display section. ) In a liquid crystal display device configured to display warning information, a through hole is provided in a portion of the reflective plate corresponding to the back of the second pattern display portion of the liquid crystal panel, and an auxiliary light source is provided behind the through hole. A liquid crystal display for a vehicle, characterized in that the liquid crystal display is arranged such that light is incident from the auxiliary light source into the light guide plate through the through hole when warning information is displayed on the liquid crystal panel under the operation of the dimming circuit. Display device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59109190A JPS60252324A (en) | 1984-05-28 | 1984-05-28 | Liquid crystal display device for vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59109190A JPS60252324A (en) | 1984-05-28 | 1984-05-28 | Liquid crystal display device for vehicle |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60252324A true JPS60252324A (en) | 1985-12-13 |
JPH0521212B2 JPH0521212B2 (en) | 1993-03-23 |
Family
ID=14503915
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59109190A Granted JPS60252324A (en) | 1984-05-28 | 1984-05-28 | Liquid crystal display device for vehicle |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60252324A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62125619U (en) * | 1986-01-31 | 1987-08-10 | ||
JPH0363688A (en) * | 1989-06-08 | 1991-03-19 | General Electric Co <Ge> | Prism type lighting apparatus for flat panel display |
-
1984
- 1984-05-28 JP JP59109190A patent/JPS60252324A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62125619U (en) * | 1986-01-31 | 1987-08-10 | ||
JPH0363688A (en) * | 1989-06-08 | 1991-03-19 | General Electric Co <Ge> | Prism type lighting apparatus for flat panel display |
Also Published As
Publication number | Publication date |
---|---|
JPH0521212B2 (en) | 1993-03-23 |
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