JPH09297305A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JPH09297305A JPH09297305A JP8135979A JP13597996A JPH09297305A JP H09297305 A JPH09297305 A JP H09297305A JP 8135979 A JP8135979 A JP 8135979A JP 13597996 A JP13597996 A JP 13597996A JP H09297305 A JPH09297305 A JP H09297305A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- display panel
- light
- display device
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
- G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
-
- 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
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0018—Redirecting means on the surface of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0051—Diffusing sheet or layer
-
- 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
- G02F1/1336—Illuminating devices
- G02F1/133618—Illuminating devices for ambient light
-
- 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
- G02F1/1336—Illuminating devices
- G02F1/133626—Illuminating devices providing two modes of illumination, e.g. day-night
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、液晶表示装置に関
し、例えばカーナビゲーションシステム等に適用して車
載用の液晶表示装置等に適用することができる。本発明
は、液晶表示装置を日除けに配置すると共に、外来光を
利用して液晶表示パネルを照明することにより、外来光
による視認性、特性の劣化を低減する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and can be applied to, for example, a vehicle navigation liquid crystal display device or the like. According to the present invention, the liquid crystal display device is arranged in the shade and the liquid crystal display panel is illuminated by using the external light to reduce the deterioration of the visibility and the characteristics due to the external light.
【０００２】[0002]
【従来の技術】従来、カーナビゲーションシステムは、
例えばＧＰＳ（Global PositinoningSystem）受信装置
により現在位置を検出し、ダッシュボード又はダッシュ
ボード近傍に配置した液晶表示装置によりこの現在位置
を表示するようになされている。2. Description of the Related Art Conventionally, car navigation systems are
For example, the current position is detected by a GPS (Global Positinoning System) receiving device, and the current position is displayed by a dashboard or a liquid crystal display device arranged near the dashboard.
【０００３】ここでこの現在位置の表示は、一般に、現
在位置を示すマーカーを地図上に配置して形成され、こ
れにより運転手において、現在位置を簡易かつ確実に把
握できるようになされている。Here, the display of the current position is generally formed by arranging a marker indicating the current position on the map, so that the driver can easily and surely grasp the current position.
【０００４】[0004]
【発明が解決しようとする課題】ところでこのように液
晶表示装置をカーナビゲーションシステムに適用する
と、外来光により表示画面の視認性が著しく低減する問
題がある。すなわちダッシュボード又はダッシュボード
近傍に液晶表示装置を配置すると、直射日光が液晶表示
パネル面に入射する場合がある。この場合、液晶表示装
置においては、液晶表示パネル面で直射日光が反射する
ことにより、表示画面が極めて見ずらくなる。When the liquid crystal display device is applied to the car navigation system as described above, there is a problem that the visibility of the display screen is significantly reduced by external light. That is, when the liquid crystal display device is arranged on the dashboard or in the vicinity of the dashboard, direct sunlight may enter the liquid crystal display panel surface. In this case, in the liquid crystal display device, direct sunlight is reflected on the surface of the liquid crystal display panel, which makes the display screen extremely difficult to see.
【０００５】また長期間の駐車等により、液晶表示パネ
ル面への直射日光の入射が長期に及ぶと、この直射日光
の熱、紫外線により液晶表示パネル自体の特性が劣化す
る恐れもある。Further, when the sunlight is directly incident on the surface of the liquid crystal display panel for a long time due to parking for a long period of time, the characteristics of the liquid crystal display panel itself may be deteriorated by the heat and ultraviolet rays of the direct sunlight.
【０００６】本発明は以上の点を考慮してなされたもの
で、外来光による視認性、特性の劣化を低減することが
できる液晶表示装置を提案しようとするものである。The present invention has been made in consideration of the above points, and an object thereof is to propose a liquid crystal display device capable of reducing deterioration of visibility and characteristics due to external light.
【０００７】[0007]
【課題を解決するための手段】かかる課題を解決するた
め本発明においては、板状の日除けに液晶表示装置を組
み込むようにする。また、採光窓より入射する外来光を
液晶表示パネルの背面に導き、照明光と共に、液晶表示
パネルを照明する。In order to solve such a problem, in the present invention, a liquid crystal display device is incorporated in a plate-shaped awning. In addition, external light that enters through the lighting window is guided to the back surface of the liquid crystal display panel, and the liquid crystal display panel is illuminated with the illumination light.
【０００８】板状の日除けに液晶表示装置を組み込むよ
うにすれば、必要に応じてこの日除けを折り畳むことに
より、液晶表示パネルへの直射日光の入射を防止するこ
とができる。また採光窓より入射した外来光を液晶表示
パネルの背面に導き、照明光と共に、液晶表示パネルを
照明すれば、外来光の光量に対応して液晶表示パネルの
照明光量を増大でき、これにより視認性の劣化を低減す
ることができる。If the liquid crystal display device is incorporated into the plate-shaped sunshade, the sunshade can be folded as necessary to prevent direct sunlight from entering the liquid crystal display panel. Also, by guiding the external light incident from the lighting window to the back of the liquid crystal display panel and illuminating the liquid crystal display panel together with the illumination light, it is possible to increase the illumination light amount of the liquid crystal display panel according to the amount of the external light. The deterioration of the sex can be reduced.
【０００９】[0009]
【発明の実施の形態】以下、適宜図面を参照しながら本
発明の実施の形態を詳述する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１０】図２（Ａ）及び（Ｂ）は、本発明の実施の
形態に係るカーナビゲーションシステムを示し、この実
施の形態では、車両の日除けでなるサンバイザー２と一
体に構成される。2 (A) and 2 (B) show a car navigation system according to an embodiment of the present invention. In this embodiment, the car navigation system is integrated with a sun visor 2 which is a sunshade of a vehicle.
【００１１】すなわちサンバイザー２は、取り外し可能
に車両に保持され、運転席、助手席の上部にて、必要に
応じてフロントガラス等を一部遮るように可動して、直
射日光を遮光する。サンバイザー２は、このようにして
直射日光を遮光した状態で、直射日光が照射する裏面側
に（図２（Ａ））、外来光を入射する採光窓３が配置さ
れ、残る裏面の一部に光電変換素子でなる太陽電池４
と、ＧＰＳ受信システムの一部を構成するアンテナ５と
が配置されるようになされている。That is, the sun visor 2 is detachably held in the vehicle, and is movable above the driver's seat and the passenger's seat so as to partially block the windshield and the like to block direct sunlight. In this way, the sun visor 2 is provided with a daylighting window 3 through which external light is incident on the rear surface side where the direct sunlight irradiates (FIG. 2 (A)) in the state where the direct sunlight is shielded, and a part of the remaining rear surface. Solar cell 4 consisting of photoelectric conversion element
And an antenna 5 forming a part of the GPS receiving system.
【００１２】これに対してサンバイザー２は、表面に
（図２（Ａ））、液晶表示パネル６が配置され、この液
晶表示パネル６の下側に操作パネル７が配置されるよう
になされている。またこの液晶表示パネル６に隣接し
て、扉８が配置され、この扉８を開いてＣＤ−ＲＯＭ９
を装填できるようになされている。On the other hand, in the sun visor 2, a liquid crystal display panel 6 is arranged on the surface (FIG. 2 (A)), and an operation panel 7 is arranged below the liquid crystal display panel 6. There is. Further, a door 8 is arranged adjacent to the liquid crystal display panel 6, and the CD-ROM 9 is opened by opening the door 8.
Can be loaded.
【００１３】液晶表示パネル６を中心に断面を取って図
１に示すように、さらにサンバイザー２は、配線基板及
びＣＤ−ＲＯＭ再生部１０を内蔵し、この配線基板上
に、ＧＰＳ受信部１１、制御部１２、駆動回路１３、リ
チャージャブルバッテリ１４を保持する。As shown in FIG. 1 by taking a cross section around the liquid crystal display panel 6, the sun visor 2 further incorporates a wiring board and a CD-ROM reproducing section 10 on which a GPS receiving section 11 is provided. The controller 12, the drive circuit 13, and the rechargeable battery 14 are held.
【００１４】ここでＧＰＳ受信部１１は、制御部１２に
より制御されて動作を切り換え、アンテナ５と共にＧＰ
Ｓ受信システムを構成し、このＧＰＳ受信システムによ
り検出される現在位置情報Ｄ１を制御部１２に出力す
る。ＣＤ−ＲＯＭ再生部１０は、制御部１２により制御
されて動作を切り換え、ＣＤ−ＲＯＭ９（図２）に記録
されたビットマップデータを選択的に制御部１２に出力
することにより、ＧＰＳ受信部１１により検出された現
在位置に対応する地図データを制御部１２に出力する。
駆動回路１３は、制御部１２より供給される駆動電源を
昇圧して交流電源により出力し、これにより液晶表示パ
ネル６のバックライトを駆動する。Here, the GPS receiving section 11 is controlled by the control section 12 to switch its operation, and the GPS receiving section 11 together with the antenna 5 is GP.
The S reception system is configured to output the current position information D1 detected by this GPS reception system to the control unit 12. The CD-ROM reproducing unit 10 is controlled by the control unit 12 to switch its operation, and selectively outputs the bitmap data recorded in the CD-ROM 9 (FIG. 2) to the control unit 12, thereby the GPS receiving unit 11 The map data corresponding to the current position detected by is output to the control unit 12.
The drive circuit 13 boosts the drive power supplied from the control unit 12 and outputs it by the AC power, thereby driving the backlight of the liquid crystal display panel 6.
【００１５】制御部１２は、マイクロコンピュータで構
成され、操作パネル７の操作に応動してこのカーナビゲ
ーションシステム１全体の動作を制御する。すなわち制
御部１２は、ユーザーの操作に応動してＧＰＳ受信部１
１の動作を制御し、現在位置情報Ｄ１を取得する。さら
に制御部１２は、この現在位置情報Ｄ１を基準にしてＣ
Ｄ−ＲＯＭ再生部１０に制御コマンドを発行し、対応す
るビットマップデータを取得する。これにより制御部１
２は、このビットマップデータにより液晶表示パネル６
を駆動して現在位置周辺の地図を表示し、さらにこの地
図上にて現在位置を示すマーカーを表示する。The control unit 12 is composed of a microcomputer and controls the operation of the entire car navigation system 1 in response to the operation of the operation panel 7. That is, the control unit 12 operates in response to the user's operation, and the GPS receiving unit 1
The operation of No. 1 is controlled and the current position information D1 is acquired. Further, the control unit 12 uses the current position information D1 as a reference to determine C
A control command is issued to the D-ROM reproduction unit 10 to obtain the corresponding bitmap data. As a result, the control unit 1
2 is the liquid crystal display panel 6 by this bit map data.
Is displayed to display a map around the current position, and a marker indicating the current position is displayed on this map.
【００１６】この基本的な動作に加えて制御部１２は、
太陽電池４及びリチャージャブルバッテリ１４の端子電
圧をモニタし、この監視結果より、例えばユーザーによ
りこのカーナビゲーションシステム１の基本的な動作が
停止制御されている場合、太陽電池４の電源でリチャー
ジャブルバッテリ１４を充電する。また動作時において
は、リチャージャブルバッテリ１４及び太陽電池４の電
源を全体に供給する。In addition to this basic operation, the controller 12
The terminal voltages of the solar cell 4 and the rechargeable battery 14 are monitored, and from this monitoring result, for example, when the basic operation of the car navigation system 1 is stopped and controlled by the user, the rechargeable battery 14 is powered by the power source of the solar cell 4. To charge. In addition, during operation, the rechargeable battery 14 and the solar cell 4 are supplied with power as a whole.
【００１７】さらに制御部１２は、太陽電池４の端子電
圧のモニタ結果より、外来光の入射光量を検出し、この
検出結果より駆動回路１３により駆動されるバックライ
ト機構の照明光光量を調整する。Further, the control unit 12 detects the incident light amount of the external light from the monitoring result of the terminal voltage of the solar cell 4, and adjusts the illumination light amount of the backlight mechanism driven by the drive circuit 13 based on the detection result. .
【００１８】すなわちこのサンバイザー２は、採光窓３
の内側に、台形形状のプリズム１９を有し、この台形形
状のプリズム１９は、金属膜を蒸着して斜面に反射面２
０が形成され、採光窓３より入射した外来光Ｌ１をこの
反射面２０にて反射して液晶表示パネル６の背面に出射
する。液晶表示パネル６の背面には、断面楔型形状のプ
リズム２１が配置され、プリズム１９より出射された外
来光Ｌ１を斜面にて反射して液晶表示パネル６に出射す
る。That is, the sun visor 2 has a daylighting window 3
A trapezoidal prism 19 is provided on the inside of the trapezoidal prism.
0 is formed, and the external light L1 that has entered through the daylighting window 3 is reflected by the reflecting surface 20 and emitted to the back surface of the liquid crystal display panel 6. A prism 21 having a wedge-shaped cross section is arranged on the back surface of the liquid crystal display panel 6, and the external light L1 emitted from the prism 19 is reflected on the slope and emitted to the liquid crystal display panel 6.
【００１９】かくしてプリズム１９及び２０は、採光窓
３より入射する外来光Ｌ１を液晶表示パネル６に導くラ
イトガイド機構を形成する。これにより液晶表示パネル
６は、採光窓３より入射する外来光Ｌ１により照明され
て表示内容を確認できるようになされている。なおプリ
ズム１９及び２０は、外来光の出射面Ｍ１及びＭ２に光
拡散面が形成され、これにより外部の風景等が液晶表示
パネル６に写し出されないようになされている。Thus, the prisms 19 and 20 form a light guide mechanism for guiding the extraneous light L1 entering from the daylighting window 3 to the liquid crystal display panel 6. As a result, the liquid crystal display panel 6 is illuminated by the external light L1 entering through the daylighting window 3 and the displayed contents can be confirmed. The prisms 19 and 20 have light diffusing surfaces formed on the outgoing surfaces M1 and M2 of the external light so that the external scenery and the like are not displayed on the liquid crystal display panel 6.
【００２０】さらにこのプリズム２１の背面には、光拡
散板２２を間に挟んで、バックライト機構２４が配置さ
れる。ここでバックライト機構２４は、駆動回路１３に
より駆動される蛍光ランプと、この蛍光ランプの出射光
を液晶表示パネル６の全面に広げる板状部材により構成
され、この板状部材の出射光を光拡散板２２で拡散した
後、プリズム２１を透過して液晶表示パネル６に導く。
これにより液晶表示パネル６では、採光窓３を介して入
射する外来光により外来光の光量に対応する光量で照明
され、それでも不足する照明光がバックライト機構２４
より供給されるようになされている。Further, on the back surface of the prism 21, a backlight mechanism 24 is arranged with a light diffusion plate 22 interposed therebetween. Here, the backlight mechanism 24 is composed of a fluorescent lamp driven by the drive circuit 13 and a plate-shaped member that spreads the emitted light of the fluorescent lamp over the entire surface of the liquid crystal display panel 6, and emits the emitted light of the plate-shaped member. After being diffused by the diffusion plate 22, the light is transmitted through the prism 21 and guided to the liquid crystal display panel 6.
As a result, the liquid crystal display panel 6 is illuminated by the external light that enters through the daylighting window 3 with a light amount corresponding to the amount of the external light, and the illumination light that is still insufficient is illuminated by the backlight mechanism 24.
Is being supplied more.
【００２１】以上の構成において、ユーザーにおいて、
カーナビゲーションシステムを使用しない場合、またサ
ンバイザー２としても使用しない場合、所定の収納位置
にサンバイザー２がはね上げられて保持されることによ
り、このサンバイザー２に配置した液晶表示パネル６に
あっては、直射日光の入射が有効に回避され、特性の劣
化が低減される。In the above configuration, the user
When the car navigation system is not used, or when the sun visor 2 is not used, the sun visor 2 is flipped up and held at a predetermined storage position so that the liquid crystal display panel 6 arranged on the sun visor 2 is In this case, the incidence of direct sunlight is effectively avoided, and the deterioration of characteristics is reduced.
【００２２】これに対してサンバイザーとして使用して
直射日光を遮光する場合は、裏面に配置された太陽電池
４の電力によりリチャージャブルバッテリ１４が充電さ
れ、これにより例えばこのサンバイザーを取り外して携
帯する場合等の電力がこの間充電される。On the other hand, when it is used as a sun visor to block direct sunlight, the rechargeable battery 14 is charged by the electric power of the solar cell 4 arranged on the back surface, so that the sun visor can be removed and carried. The electric power of the case etc. is charged during this.
【００２３】またユーザーが現在位置を確認する場合に
は、表示画面を見易い角度、向きにサンバイザー２を可
動することにより、当然に、サンバイザーとして直射日
光等の外来光を遮る状態に保持される。これにより背面
の太陽電池４により電力の供給を受けた状態で、採光窓
３より入射する外来光が（図１）、プリズム１９及び２
０を介して背面より液晶表示パネル６を照明する。この
ときこの液晶表示パネル６の照明光量は、外来光の光量
が増大して表示画面が見にくくなると、採光窓３より入
射する外来光の光量が、見にくさを補うように増大する
ことにより、その分単にダッシュボード等に液晶表示装
置を配置する場合に比して各段的に視認性を向上するこ
とができる。Further, when the user confirms the current position, the sun visor 2 is moved so that the display screen can be easily viewed at an angle and direction, so that the sun visor is naturally kept in a state of blocking external light such as direct sunlight. It As a result, in a state where power is supplied from the solar cell 4 on the back surface, external light entering from the daylighting window 3 (FIG. 1) is reflected by the prisms 19 and 2
The liquid crystal display panel 6 is illuminated from the rear side through 0. At this time, when the amount of extraneous light increases and the display screen becomes difficult to see, the amount of extraneous light entering through the daylighting window 3 increases so as to compensate for the difficulty of viewing. The visibility can be improved in stages as compared with the case where the liquid crystal display device is simply arranged on the dashboard or the like.
【００２４】さらにこのような状態でも、特に夜間等に
おいては、照明光の光量が不足することにより、この不
足する光量がバックライト機構２４により補われ、さら
にいっそう視認性が向上される。Further, even in such a state, especially at night or the like, the light amount of the illumination light becomes insufficient, so that the insufficient light amount is compensated by the backlight mechanism 24, and the visibility is further improved.
【００２５】これに対してカーナビゲーションシステム
を携帯して使用する場合は、サンバイザーを取り外し
て、車内にて使用する場合と同様の使用により、視認性
を向上することができる。On the other hand, when the car navigation system is used while being carried, the visibility can be improved by removing the sun visor and using the car navigation system in the same way as when using the car interior.
【００２６】以上の構成によれば、カーナビゲーション
システムの液晶表示装置をサンバイザーに配置すると共
に、外来光を利用して液晶表示パネルを照明することに
より、外来光による視認性、特性の劣化を低減すること
ができる。According to the above construction, the liquid crystal display device of the car navigation system is arranged in the sun visor, and the external light is used to illuminate the liquid crystal display panel, whereby the visibility and characteristics are deteriorated by the external light. It can be reduced.
【００２７】なお上述の実施の形態においては、液晶表
示パネルに対して、側面より外来光を供給し、背面より
バックライト機構の照明光を供給する場合について述べ
たが、本発明はこれに限らず、これとは逆に、側面より
バックライト機構の照明光を、背面より外来光を供給し
てもよい。In the above-described embodiments, the case where external light is supplied to the liquid crystal display panel from the side surface and the illumination light of the backlight mechanism is supplied from the rear surface has been described, but the present invention is not limited to this. Alternatively, conversely, the illumination light of the backlight mechanism may be supplied from the side surface and the external light may be supplied from the back surface.
【００２８】さらに上述の実施の形態においては、２つ
のプリズム１９及び２０により外来光の光ガイド機構を
構成する場合について述べたが、本発明はこれに限ら
ず、プリズムに変えてミラー、ハーフミラーを用いて光
ガイド機構を構成する場合、さらには光ファイバーを用
いてライトガイド機構を構成する場合等、種々の構成を
広く適用することができる。なおこのように光ファイバ
ーを用いてライトガイド機構を構成する場合等にあって
は、必ずしも採光窓は液晶表示パネルの背面に限られる
ものではない。Further, in the above-described embodiment, the case where the two prisms 19 and 20 constitute an optical guide mechanism for external light has been described, but the present invention is not limited to this, and a prism or a half mirror is used instead of the prism. Various configurations can be widely applied, such as a case where a light guide mechanism is formed by using, and a case where the light guide mechanism is formed by using an optical fiber. In the case where the light guide mechanism is configured by using the optical fiber as described above, the lighting window is not necessarily limited to the back surface of the liquid crystal display panel.
【００２９】また上述の実施の形態においては、太陽電
池の電力を単にリチャージャブルバッテリ１４の補助及
び充電用に使用する場合について述べたが、本発明はこ
れに限らず、車両本体のバッテリの充電用にも広く適用
することができる。Further, in the above-mentioned embodiment, the case where the electric power of the solar cell is simply used for assisting and charging the rechargeable battery 14 has been described, but the present invention is not limited to this, and it is for charging the battery of the vehicle body. It can also be widely applied to.
【００３０】さらに上述の実施の形態においては、本発
明をカーナビゲーションシステムの液晶表示装置に適用
した場合について述べたが、本発明はこれに限らず、テ
レビジョン受像機の液晶表示装置等、車両、船舶等の種
々の移動体に搭載する液晶表示装置に広く適用すること
ができる。Further, in the above-mentioned embodiments, the case where the present invention is applied to the liquid crystal display device of the car navigation system has been described, but the present invention is not limited to this, and the liquid crystal display device of the television receiver or the like can be used in the vehicle. The invention can be widely applied to liquid crystal display devices mounted on various moving bodies such as ships.
【００３１】[0031]
【発明の効果】上述のように本発明によれば、液晶表示
装置を日除けに配置すると共に、外来光を利用して液晶
表示パネルを照明することにより、外来光による視認
性、特性の劣化を低減することができる。As described above, according to the present invention, by arranging the liquid crystal display device in the shade and illuminating the liquid crystal display panel by using the external light, the visibility and the characteristic are deteriorated by the external light. It can be reduced.
【図１】本発明の実施の形態に係るカーナビゲーション
システムを示すブロック図である。FIG. 1 is a block diagram showing a car navigation system according to an embodiment of the present invention.
【図２】図２のサンバイザーを示す斜視図である。FIG. 2 is a perspective view showing the sun visor of FIG.
１……カーナビゲーションシステム、２……サンバイザ
ー、３……採光窓、４……太陽電池、５……アンテナ、
６……液晶表示パネル、１２……制御部1 ... Car navigation system, 2 ... Sun visor, 3 ... Daylighting window, 4 ... Solar cell, 5 ... Antenna,
6 ... Liquid crystal display panel, 12 ... Control unit
Claims (3)
ライト機構と、 前記外来光を入射する採光窓と、 前記採光窓より入射する前記外来光を前記液晶表示パネ
ルの背面に導き、前記照明光と共に、前記液晶表示パネ
ルを照明する光ガイド機構とを備えることを特徴とする
液晶表示装置。1. A liquid crystal display panel incorporated in a plate-shaped awning and arranged on the surface of the awning; a backlight mechanism for emitting illumination light to illuminate the liquid crystal display panel; A liquid crystal display device comprising: a daylighting window; and a light guide mechanism that guides the extraneous light entering from the daylighting window to the back surface of the liquid crystal display panel and illuminates the liquid crystal display panel with the illumination light.
電変換素子を配置したことを特徴とする請求項１に記載
の液晶表示装置。2. The liquid crystal display device according to claim 1, wherein the photoelectric conversion element is arranged on all or a part of the back surface of the awning.
より検出された現在位置検出結果を前記液晶表示パネル
により表示することを特徴とする請求項１に記載の液晶
表示装置。3. The liquid crystal display device according to claim 1, wherein the liquid crystal display panel is arranged on a moving body and displays the current position detection result detected by the current position detection mechanism on the liquid crystal display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8135979A JPH09297305A (en) | 1996-05-02 | 1996-05-02 | Liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8135979A JPH09297305A (en) | 1996-05-02 | 1996-05-02 | Liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09297305A true JPH09297305A (en) | 1997-11-18 |
Family
ID=15164359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8135979A Pending JPH09297305A (en) | 1996-05-02 | 1996-05-02 | Liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09297305A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6771331B1 (en) | 1999-04-30 | 2004-08-03 | Matsushita Electric Industrial Co., Ltd. | Lighting device and liquid crystal display |
| US8149351B2 (en) | 2008-12-08 | 2012-04-03 | 3M Innovative Properties Company | Passive and hybrid daylight-coupled backlights for sunlight viewable displays |
| US8228463B2 (en) | 2009-11-18 | 2012-07-24 | 3M Innovative Properties Company | Passive daylight-coupled backlight with turning film having prisms with chaos for sunlight viewable displays |
| US8339542B2 (en) | 2009-06-26 | 2012-12-25 | 3M Innovative Properties Company | Passive and hybrid daylight-coupled N-stack and collapsible backlights for sunlight viewable displays |
| US8384852B2 (en) | 2010-11-22 | 2013-02-26 | 3M Innovative Properties Company | Hybrid daylight-coupled backlights for sunlight viewable displays |
| JP2016008002A (en) * | 2014-06-26 | 2016-01-18 | 三菱電機株式会社 | Display device |
-
1996
- 1996-05-02 JP JP8135979A patent/JPH09297305A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6771331B1 (en) | 1999-04-30 | 2004-08-03 | Matsushita Electric Industrial Co., Ltd. | Lighting device and liquid crystal display |
| US8149351B2 (en) | 2008-12-08 | 2012-04-03 | 3M Innovative Properties Company | Passive and hybrid daylight-coupled backlights for sunlight viewable displays |
| US8339542B2 (en) | 2009-06-26 | 2012-12-25 | 3M Innovative Properties Company | Passive and hybrid daylight-coupled N-stack and collapsible backlights for sunlight viewable displays |
| US8228463B2 (en) | 2009-11-18 | 2012-07-24 | 3M Innovative Properties Company | Passive daylight-coupled backlight with turning film having prisms with chaos for sunlight viewable displays |
| US8384852B2 (en) | 2010-11-22 | 2013-02-26 | 3M Innovative Properties Company | Hybrid daylight-coupled backlights for sunlight viewable displays |
| JP2016008002A (en) * | 2014-06-26 | 2016-01-18 | 三菱電機株式会社 | Display device |
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