JPH0338616A - Liquid crystal display - Google Patents
Liquid crystal displayInfo
- Publication number
- JPH0338616A JPH0338616A JP1175204A JP17520489A JPH0338616A JP H0338616 A JPH0338616 A JP H0338616A JP 1175204 A JP1175204 A JP 1175204A JP 17520489 A JP17520489 A JP 17520489A JP H0338616 A JPH0338616 A JP H0338616A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- cfl
- crystal display
- power source
- light
- 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 title claims abstract description 30
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、液晶デイスプレィに関し、特に、表示を浮き
上げるための光源取り入れる液晶デイスプレィに関する
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid crystal display, and more particularly to a liquid crystal display that incorporates a light source for raising the display.
従来、この種の液晶デイスプレィの光源は、背後光の透
過型、前面光の反射型、又は、ＥＬ−ＣＦＬ等の発光体
によるバックライト型のどれか一つの光源だけを用いる
構造となっていた。その−例として第３図にＣＦＬによ
るバックライト型液晶デイスプレィの側面図を示す。Conventionally, the light source for this type of liquid crystal display has been structured to use only one of the following types: a rear light transmission type, a front light reflection type, or a backlight type using a light emitter such as EL-CFL. . As an example, FIG. 3 shows a side view of a backlight type liquid crystal display using a CFL.
上述した従来の液晶デイスプレィの光源取り入れ方法は
、どれか一つの方式しか採用できなくなっているので、
周囲環境（外部光強度）が変わったとき切り換えられな
いという欠点がある。The conventional method of incorporating the light source into the liquid crystal display mentioned above can only be adopted in one way, so
The drawback is that it cannot be switched when the surrounding environment (external light intensity) changes.
本発明の液晶デイスプレィは、液晶パネルと、この液晶
パネルに導電板を介して光を照射する光源と、前記導電
盤を介して外部光を前記液晶パネルに照射させるハーフ
ミラ−と、前記外部光の照度に応じて前記光源を制御す
る手段とを有している。The liquid crystal display of the present invention includes: a liquid crystal panel; a light source that irradiates light to the liquid crystal panel through a conductive plate; a half mirror that irradiates external light to the liquid crystal panel through the conductive plate; and means for controlling the light source according to illuminance.
次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例のブロック図である。FIG. 1 is a block diagram of one embodiment of the present invention.
液晶デイスプレィ１は、ＣＦＬによるバックライト・シ
ステムとハーフミラ−による背後光取り入れ機能を有す
る。ＣＦＬ用電漏電源ンバータ）２は、ＣＦＬ用の昇圧
された交流電源を作り、ケーブルにて液晶デイスプレィ
１に電源を供給する。光センサー制御によるスイッチ回
路４は、光センサ−３からの外部光強度信号により、Ｃ
ＦＬ用電源２への電源供給を制御する。これらの構成に
より、外部光強度が強いときは、液晶デイスプレィ１の
ＣＦＬを断にし、弱い時は、照射することができる。The liquid crystal display 1 has a backlight system using a CFL and a back light intake function using a half mirror. The CFL electric leakage power converter 2 generates a stepped-up AC power source for the CFL, and supplies the power to the liquid crystal display 1 via a cable. The switch circuit 4 controlled by the optical sensor switches the C
Controls the power supply to the FL power supply 2. With these configurations, when the external light intensity is strong, the CFL of the liquid crystal display 1 can be turned off, and when it is weak, it can be illuminated.
次に、液晶デイスプレィ１の構造について、第２図の本
実施例の液晶デイスプレィの断面図を用いて説明する。Next, the structure of the liquid crystal display 1 will be explained using the cross-sectional view of the liquid crystal display of this embodiment shown in FIG.
液晶デイスプレィ１のフレーム５、ＣＦＬ６は、電源供
給による発光源である、導光板８を通して液晶パネル７
に光を当てる。液晶パネル７は背後からの光を遮断／透
過させることにより、表示を行なう。ハーフミラ−９は
、導光板８からの光は反射するが、背面からの外部光は
透過させる性質をもつ。このハーフミラ−９により、背
面からの外部光、ＣＦＬからの光両方を液晶パネルに当
てることができるため、外部光が強い時は、ＣＦＬをか
らの光を断にし、外部光だけで表示を行ない、外部光が
弱いときだけ、ＣＦＬからの光を照射し両方の光で表示
することができる。The frame 5 and CFL 6 of the liquid crystal display 1 are connected to the liquid crystal panel 7 through a light guide plate 8, which is a light source supplied with power.
shed light on. The liquid crystal panel 7 performs display by blocking/transmitting light from behind. The half mirror 9 has a property of reflecting light from the light guide plate 8 but transmitting external light from the back surface. This half mirror 9 allows both external light from the back and light from the CFL to hit the liquid crystal panel, so when the external light is strong, the light from the CFL is cut off and the display is performed using only external light. , only when the external light is weak, it is possible to irradiate the light from the CFL and display using both lights.
以上説明したように本発明は、外部光強度を検出して自
動的に液晶デイスプレィの光源を切り換えることにより
、外部光が強いときにＣＦＬバックライトシステムでの
消費電流をなくし、又、ＣＦＬ寿命を伸ばす効果がある
。As explained above, the present invention detects the intensity of external light and automatically switches the light source of the liquid crystal display, thereby eliminating the current consumption in the CFL backlight system when the external light is strong and also shortening the life of the CFL. It has a stretching effect.
第１図は本発明の一実施例のブロック図、第２図は本実
施例の液晶デイスプレィの側面図、第３図は従来の液晶
デイスプレィの一例の側面図である。FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a side view of a liquid crystal display of this embodiment, and FIG. 3 is a side view of an example of a conventional liquid crystal display.
Claims (1)
照射する光源と、前記導電盤を介して外部光を前記液晶
パネルに照射させるハーフミラーと、前記外部光の照度
に応じて前記光源を制御する手段とを有することを特徴
とする液晶ディスプレイ。a liquid crystal panel; a light source that irradiates light to the liquid crystal panel via a conductive plate; a half mirror that irradiates external light to the liquid crystal panel via the conductive plate; A liquid crystal display characterized in that it has a means for controlling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1175204A JPH0338616A (en) | 1989-07-05 | 1989-07-05 | Liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1175204A JPH0338616A (en) | 1989-07-05 | 1989-07-05 | Liquid crystal display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0338616A true JPH0338616A (en) | 1991-02-19 |
Family
ID=15992117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1175204A Pending JPH0338616A (en) | 1989-07-05 | 1989-07-05 | Liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0338616A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1300824A2 (en) * | 2001-10-05 | 2003-04-09 | Fujitsu Limited | Liquid crystal display device for use in electronic apparatus |
| WO2011096148A1 (en) * | 2010-02-08 | 2011-08-11 | シャープ株式会社 | Liquid-crystal display device |
-
1989
- 1989-07-05 JP JP1175204A patent/JPH0338616A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1300824A2 (en) * | 2001-10-05 | 2003-04-09 | Fujitsu Limited | Liquid crystal display device for use in electronic apparatus |
| EP1300824A3 (en) * | 2001-10-05 | 2006-05-10 | Fujitsu Limited | Liquid crystal display device for use in electronic apparatus |
| WO2011096148A1 (en) * | 2010-02-08 | 2011-08-11 | シャープ株式会社 | Liquid-crystal display device |
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