JPS6257287U - - Google Patents
Info
- Publication number
- JPS6257287U JPS6257287U JP14874885U JP14874885U JPS6257287U JP S6257287 U JPS6257287 U JP S6257287U JP 14874885 U JP14874885 U JP 14874885U JP 14874885 U JP14874885 U JP 14874885U JP S6257287 U JPS6257287 U JP S6257287U
- Authority
- JP
- Japan
- Prior art keywords
- external
- photodetectors
- liquid crystal
- crystal display
- brightness
- 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 description 4
- 238000005286 illumination Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
第１図は本考案の実施例に係る液晶表示器の外
部照明調光装置の構成の概略を示したブロツク図
、第２図は第１図に示した装置の具体的構成を示
した回路図、第３図は第２図に示した装置の動作
説明図である。
１ａ，１ｂ……光検出器、２……スイツチ回路
、３……駆動回路、４……外部照明、５……液晶
表示器、１１ａ，１１ｂ……ＣｄＳ素子、１２…
…比較器、１３……増幅器、１４……電球。
FIG. 1 is a block diagram showing an outline of the configuration of an external lighting control device for a liquid crystal display according to an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a specific configuration of the device shown in FIG. 1. , FIG. 3 is an explanatory diagram of the operation of the apparatus shown in FIG. 2. 1a, 1b...Photodetector, 2...Switch circuit, 3...Drive circuit, 4...External illumination, 5...Liquid crystal display, 11a, 11b...CdS element, 12...
...Comparator, 13...Amplifier, 14...Light bulb.
Claims (1)
検出信号に基づき、前記外部照明をＯＮ状態にす
るスイツチング手段と、 前記二つの光検出器における他方の光検出器の
検出信号を与えられて、外部光の明るさに応じて
外部照明を調光する駆動手段とを備えたことを特
徴とする液晶表示器の外部照明調光装置。[Claims for Utility Model Registration] Two photodetectors that detect the brightness of external light, an external illumination provided in connection with a liquid crystal display, and detection by one of the two photodetectors. switching means for turning on the external lighting based on the signal; and receiving a detection signal from the other of the two photodetectors to dim the external lighting in accordance with the brightness of the external light. 1. An external lighting dimming device for a liquid crystal display, comprising: a driving means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14874885U JPS6257287U (en) | 1985-09-27 | 1985-09-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14874885U JPS6257287U (en) | 1985-09-27 | 1985-09-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6257287U true JPS6257287U (en) | 1987-04-09 |
Family
ID=31063310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14874885U Pending JPS6257287U (en) | 1985-09-27 | 1985-09-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6257287U (en) |
-
1985
- 1985-09-27 JP JP14874885U patent/JPS6257287U/ja active Pending
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