JPH032835A - display device - Google Patents
display deviceInfo
- Publication number
- JPH032835A JPH032835A JP1137652A JP13765289A JPH032835A JP H032835 A JPH032835 A JP H032835A JP 1137652 A JP1137652 A JP 1137652A JP 13765289 A JP13765289 A JP 13765289A JP H032835 A JPH032835 A JP H032835A
- Authority
- JP
- Japan
- Prior art keywords
- light
- display
- liquid crystal
- display body
- light source
- 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
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 36
- 210000002858 crystal cell Anatomy 0.000 claims abstract description 11
- 230000007423 decrease Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Liquid Crystal (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）
本発明は液晶素子やエレクトロクロミック（ＥＣ）素子
を表示体として用い、後方に配置した光源に°よろ透過
光によって文字２図形等表示指標を表示するいわゆるバ
ックライトタイプの表示装置に於ける透過光調整に関す
るものである。Detailed Description of the Invention (Industrial Field of Application) The present invention uses a liquid crystal element or an electrochromic (EC) element as a display body, and displays indicators such as characters, two figures, etc. by means of light transmitted through a light source placed at the rear. This invention relates to adjustment of transmitted light in a so-called backlight type display device.
（従来の技術及び発明が解決しようとする課ｉり液晶素
子やＥＣ素子を表示体として利用した）＜ツクライトタ
イプの表示装置は、表示指標を表示体の後方に配置した
光源からの光の透過及び遮断、或いは透過光の着色等に
基づいて行っている。この様なバックライトタイプの表
示装置を車両等に実装した場合、透過光が明るくすぎた
り逆に暗（なりすぎると明確に表示が視認できず、また
透過光の明暗感覚は例えば昼間光と夜間光のような外部
光によって大きく左右される”。そこでバックライトタ
イプの表示装置に在っては、透過光の明るさを制御する
制御機構を付設している。従来の制御機構はバックライ
トとなる光源自体を制御しているもので、光源が電球の
場合は、印加電圧を増減することで、容易に調整しうる
が、電球の場合は印加電圧の低下によってその色相が変
化してしまう。また光源に放？ｔＥ管を用いてなる場合
は、その輝度制御回路が複雑になると共に、減光の程度
によっては不点灯となったり色相が変化してしまい、所
望した表示ができない虞もある。(Issues that the prior art and invention are trying to solve: A liquid crystal element or an EC element is used as a display body.) A light-type display device uses light from a light source with a display index placed behind the display body. This is done based on transmission and blocking, or coloring of transmitted light. When such a backlight type display device is installed in a vehicle, etc., the transmitted light is too bright or too dark (if it becomes too dark, the display cannot be seen clearly, and the sense of brightness of the transmitted light is different from daylight to nighttime). This is largely influenced by external light such as light.Therefore, backlight type display devices are equipped with a control mechanism that controls the brightness of transmitted light.The conventional control mechanism is When the light source is a light bulb, it can be easily adjusted by increasing or decreasing the applied voltage, but in the case of a light bulb, the hue changes as the applied voltage decreases. In addition, when a radiant tE tube is used as a light source, the brightness control circuit becomes complicated, and depending on the degree of dimming, the light may not turn on or the hue may change, and there is a risk that the desired display may not be obtained. .
（課題を解決するための手段）
本発明は前記課題を鑑み、バンクライトタイプの表示装
置に於て、光源自体を制御せず、表示体と光源との間に
透過光の光量制御を行う制御機構を介装したものである
。(Means for Solving the Problems) In view of the above-mentioned problems, the present invention provides a control method for controlling the amount of transmitted light between a display body and a light source without controlling the light source itself in a bank light type display device. It has a mechanism installed.
即ち本発明に係る表示装置は、表示文字１図形等表示指
標を透過光を以て視認する表示体と、前記表示体の後方
に配置された表示体の透過光を発する光源とで構成され
る表示装置に於て、前記表示体と光源との間に、液晶セ
ル内の分割電極に対する選択的通電によって透過光制御
を行う液晶部を介装したことを特徴とするものである。That is, the display device according to the present invention includes a display body that visually recognizes a display indicator such as a display character 1 figure using transmitted light, and a light source that emits the transmitted light of the display body disposed behind the display body. The present invention is characterized in that a liquid crystal section is interposed between the display body and the light source for controlling transmitted light by selectively energizing divided electrodes in the liquid crystal cell.
（作 用）
光源から発した光は、液晶部を通って表示体に入射し、
所定の表示指標を明暗の差にて表示するようにしており
、液晶部に於て、分割電極を選択的に通電せしめると、
前記選択部分が光を遮断若しくは透過させるので、選択
面積の変化や選択パターンを制御することによって容易
に表示体の明るさを制御できろ。(Function) The light emitted from the light source passes through the liquid crystal section and enters the display.
A predetermined display index is displayed with a difference in brightness and darkness, and when the divided electrodes are selectively energized in the liquid crystal section,
Since the selected portion blocks or transmits light, the brightness of the display can be easily controlled by changing the selected area or controlling the selected pattern.
（実施例） 次に本発明の実施例を図面に基づいて説明する。(Example) Next, embodiments of the present invention will be described based on the drawings.
第１図は表示装置全体の構成を示すもので、第２図及び
第３図は本発明による透過光の制御の原理を示すもので
ある。FIG. 1 shows the overall structure of the display device, and FIGS. 2 and 3 show the principle of controlling transmitted light according to the present invention.
表示装置は後面側から光源１．液晶部２２表示体３を有
し、光源１は電球１）又は放電管で所定の駆動回路１０
を付設してなる。液晶部２は後述する透過光制御を行う
機能を有せしめたもので、表裏に偏光板２１．、２１ｂ
を配したＴＮモードの液晶セル２２からなり、前記液晶
セル２２はマトリクス形表示の電極２２１又はストライ
ブ形ｒｉ極のような所定パターンの分割電極を設けてい
ると共に、前記電極２２１に電圧を印加する駆動回路部
２０を付設してなる。また表示体３は背面側に配した拡
散板３１と表裏に偏光板３２．、３２．を配した液晶セ
ル３３からなり、液晶セル３３は表示せんとする文字２
図形等表示指標に対応した形状の透明電極３３１を設け
、当該透明電極３３１に対する駆動回路３０を付設して
なる。The display device is connected to the light source 1 from the rear side. It has a liquid crystal part 22 and a display body 3, and the light source 1 is a light bulb 1) or a discharge tube and a predetermined drive circuit 10.
It will be attached. The liquid crystal section 2 has a function of controlling transmitted light, which will be described later, and has polarizing plates 21. , 21b
The liquid crystal cell 22 is provided with a predetermined pattern of divided electrodes such as a matrix type display electrode 221 or a striped type RI electrode, and a voltage is applied to the electrode 221. A drive circuit section 20 is attached thereto. Further, the display body 3 includes a diffuser plate 31 arranged on the back side and polarizing plates 32 on the front and back sides. , 32. The liquid crystal cell 33 has a character 2 to be displayed.
A transparent electrode 331 having a shape corresponding to a display indicator such as a figure is provided, and a drive circuit 30 for the transparent electrode 331 is attached.
尚液晶部２の偏光板２１．、２１には互いに直交するよ
うに配置し、表示体３の偏光板３２．、３２には平行に
配してなる。Note that the polarizing plate 21 of the liquid crystal section 2. , 21 are arranged perpendicularly to each other, and the polarizing plates 32 . , 32 are arranged in parallel.
而して電球１）を点灯せしめ液晶部２の分割１梅への通
電を行わないと、第２図に示すように電球１）から発し
た光は、偏光板２１塾を通過し、液晶セル２２に入り、
ＴＮ液晶によって９０°捻じられ偏光板２１．を通って
表示体３に入る。表示体３では偏光板２１．から出射す
る光を拡散板３１で光拡散させ偏光板３２．を通して液
晶セル３３に入る 。液晶セル３３に於ては表示せんと
する形状に対・応した電極３３１に電圧を印加している
ので、電界が作用する液晶部分を通過する光は直進し、
非電圧印加部分は９０°捻れられるものである。このた
め液晶セル３３に入射光の円偏光板３３．を通して表示
側に透過する光は液晶セル３３の電圧印加部分で、これ
によって所望の表示指標の表示が明色すなわちネガにて
なされるものである。前記に在っては制御機構たる液晶
部２における制御は理論的に偏光板２１．。If the light bulb 1) is turned on and no electricity is applied to the division 1 of the liquid crystal section 2, the light emitted from the light bulb 1) will pass through the polarizing plate 21 as shown in Figure 2, and the liquid crystal cell Entering 22,
Polarizing plate 21 twisted by 90° by TN liquid crystal. It passes through and enters the display body 3. In the display body 3, a polarizing plate 21. The light emitted from the polarizing plate 32 is diffused by the diffusing plate 31. It enters the liquid crystal cell 33 through. In the liquid crystal cell 33, a voltage is applied to the electrode 331 corresponding to the shape to be displayed, so the light passing through the liquid crystal part where the electric field acts goes straight.
The non-voltage-applied portion can be twisted by 90°. Therefore, the circularly polarizing plate 33 of the incident light enters the liquid crystal cell 33. The light transmitted to the display side through the voltage application portion of the liquid crystal cell 33 causes the desired display index to be displayed in bright color, that is, in a negative color. In the above, the control in the liquid crystal section 2, which is the control mechanism, is theoretically controlled by the polarizing plate 21. .
２１ｂ、 ３２−、 ’ａ２ｂにおける減衰のみである
から、表示体３の表示指標で認められる輝度は相応に大
きい。21b, 32-, 'a2b, the luminance observed in the display index of the display body 3 is correspondingly large.
次に制御機構を動作せしめた場合について第３図に基づ
いて説明する。制御特に減光の場合は、液晶部２の分割
電極２２１に選択的通電をなすと、電圧印加された部分
の液晶は電極方向に整列して旋光性を失い、この旋光性
を失った個所を通過する光は液晶部２の偏光板２１．で
その透過が遮断されることになる。従って液晶部２で遮
断された分ｔ！け表示体３への入射量が少なくなり、そ
れに伴って表示体３の表示指標の輝度も小さくなるもの
である。Next, a case in which the control mechanism is operated will be explained based on FIG. 3. Control Particularly in the case of dimming, when the divided electrodes 221 of the liquid crystal section 2 are selectively energized, the liquid crystals in the portions to which voltage is applied align in the direction of the electrodes and lose their optical rotation, and the portions where they have lost their optical rotation are The light that passes through the polarizing plate 21 of the liquid crystal section 2. This will block its transmission. Therefore, the amount t! cut off by the liquid crystal section 2! The amount of light incident on the display body 3 decreases, and the brightness of the display index on the display body 3 also decreases accordingly.
尚本発明はバックライ！・タイプの表示装置に於て、表
示体と光源との間に液晶を用いた制御機構を介在せしめ
たもので、表示体はポジにて表示を行うものでも良く、
更に表示体は特に前記した液晶素子に限定されずＥＣ素
子を用いたものでも良く、更に光源も電球でなく放電管
でも良い。また液晶部における分割電極のパターン並び
にその選択的通電を行う駆動制御も表示体の表示形態や
、光源の形状等を考慮して任意に定めることができるも
のである。In addition, the present invention is a backlight!・This is a type of display device in which a control mechanism using liquid crystal is interposed between the display body and the light source, and the display body may display in a positive manner.
Further, the display body is not particularly limited to the above-mentioned liquid crystal element, but may be one using an EC element, and the light source may also be a discharge tube instead of a light bulb. Furthermore, the pattern of the divided electrodes in the liquid crystal section and the drive control for selectively energizing them can be arbitrarily determined by taking into consideration the display form of the display body, the shape of the light source, etc.
（発明の効果）
本発明は以上のようにバックライトタイプの表示装置に
於て、表示体と光源との間に分割電極に対する選択的通
電で透過光制御を行う液晶部を介装したもので、透過光
制御が容易に行うことができろと共に、光源の形状や表
示体の形態等を考慮しての制御も可能である利点を有す
る。(Effects of the Invention) As described above, the present invention provides a backlight type display device in which a liquid crystal part is interposed between the display body and the light source to control transmitted light by selectively energizing the divided electrodes. This has the advantage that transmitted light can be easily controlled, and control can also be performed taking into account the shape of the light source, the form of the display, and the like.
図は本発明の実施例を示すもので、第１図は全体の構成
図 第２図及び第３図は透過光制御の原理を示す図であ
る。
３１は拡散板
３２、、３２．は偏光板
３３１は表示電極
１は光源
１０は駆動回路
１）は電球
２は液晶部
２１、．２１ｂは偏光板
２２は液晶セル
２２１は分割Ｔｉ極
３は表示体The figures show an embodiment of the present invention, and FIG. 1 is an overall configuration diagram, and FIGS. 2 and 3 are diagrams showing the principle of transmitted light control. 31 is a diffusion plate 32, 32. , the polarizing plate 331, the display electrode 1, the light source 10, the drive circuit 1), the light bulb 2, the liquid crystal section 21, . 21b is a polarizing plate 22 is a liquid crystal cell 221 is a divided Ti pole 3 is a display body
Claims (1)
示体と、前記表示体の後方に配置され表示体の透過光を
発する光源とで構成される表示装置に於て、前記表示体
と光源との間に、液晶セル内の分割電極に対する選択的
通電によって透過光制御を行う液晶部を介装したことを
特徴とする表示装置。(1) In a display device consisting of a display body that visually recognizes display indicators such as characters and figures using transmitted light, and a light source that is placed behind the display body and emits the transmitted light of the display body, the display body and A display device characterized in that a liquid crystal section is interposed between a light source and a liquid crystal section that controls transmitted light by selectively energizing divided electrodes in a liquid crystal cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1137652A JPH032835A (en) | 1989-05-31 | 1989-05-31 | display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1137652A JPH032835A (en) | 1989-05-31 | 1989-05-31 | display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH032835A true JPH032835A (en) | 1991-01-09 |
Family
ID=15203649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1137652A Pending JPH032835A (en) | 1989-05-31 | 1989-05-31 | display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH032835A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04199123A (en) * | 1990-11-29 | 1992-07-20 | Sharp Corp | Liquid crystal display device |
| US7439683B2 (en) | 2003-05-21 | 2008-10-21 | Pure Depth Limited | Backlighting system for display screen |
| JP2015055805A (en) * | 2013-09-13 | 2015-03-23 | スタンレー電気株式会社 | Liquid crystal display device |
-
1989
- 1989-05-31 JP JP1137652A patent/JPH032835A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04199123A (en) * | 1990-11-29 | 1992-07-20 | Sharp Corp | Liquid crystal display device |
| US7439683B2 (en) | 2003-05-21 | 2008-10-21 | Pure Depth Limited | Backlighting system for display screen |
| JP2015055805A (en) * | 2013-09-13 | 2015-03-23 | スタンレー電気株式会社 | Liquid crystal display device |
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