JPS58118481U - Light source control device for transmitted light type display - Google Patents
Light source control device for transmitted light type displayInfo
- Publication number
- JPS58118481U JPS58118481U JP1516482U JP1516482U JPS58118481U JP S58118481 U JPS58118481 U JP S58118481U JP 1516482 U JP1516482 U JP 1516482U JP 1516482 U JP1516482 U JP 1516482U JP S58118481 U JPS58118481 U JP S58118481U
- Authority
- JP
- Japan
- Prior art keywords
- light source
- light
- control device
- type display
- source control
- 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
Landscapes
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は、従来の光源制御装置の回路ブロック図、第２
図は、本考案の一実施例を示す回路のブロック図、第３
図は、関数発生器の特性を示すグラフ、第４図は本考案
の光源制御装置の取付位置の一例を示す図、第５図は本
考案の他の実施例を示す回路のプロ゛ゾク図である。
１・・・・・・外来光検出器、２・・・・・・光源光検
出器、３・・・・・・光源駆動回路、４・・・・・・光
源、５・・・・・・関数発生器、６・・・・・・光源調
整回路、７・・・・・・比較器、８・・・・・・減算器
、９・・・・・・絶対値回路、１０・・・・・・Ｖ−Ｆ
コンバータ、１１・・・・・・アップダウンカウンタ、
１２・・・・・−Ｄ／Ａコンバータ、１４・・・・・・
透過光型表示器、１７・・・・・・発振器。Figure 1 is a circuit block diagram of a conventional light source control device;
Figure 3 is a block diagram of a circuit showing one embodiment of the present invention.
The figure is a graph showing the characteristics of the function generator, Figure 4 is a diagram showing an example of the mounting position of the light source control device of the present invention, and Figure 5 is a circuit diagram showing another embodiment of the present invention. It is. 1... External light detector, 2... Light source photodetector, 3... Light source drive circuit, 4... Light source, 5...・Function generator, 6...Light source adjustment circuit, 7...Comparator, 8...Subtractor, 9...Absolute value circuit, 10... ...V-F
Converter, 11...up/down counter,
12...-D/A converter, 14...
Transmitted light type display, 17...oscillator.
Claims (1)
表示器用光源からの光を検出する光源光検出手段と、表
示器用光源を駆動させる光源駆動手段と、前記２つの検
出手段からの信号に基づいて、光源光を外来光に対して
所定の明るさに保つように前記光源駆動手段の駆動信号
を調整する光源調整手段とからなることを特徴とする透
過光型表示器用光源制御装置。Extraneous light detection means for detecting extraneous light incident on the display;
A light source light detecting means for detecting light from the display light source, a light source driving means for driving the display light source, and a light source light having a predetermined brightness with respect to external light based on the signals from the two detection means. 1. A light source control device for a transmitted light type display device, comprising: a light source adjusting means for adjusting a drive signal of the light source driving means so as to maintain a light source of the light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1516482U JPS58118481U (en) | 1982-02-08 | 1982-02-08 | Light source control device for transmitted light type display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1516482U JPS58118481U (en) | 1982-02-08 | 1982-02-08 | Light source control device for transmitted light type display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58118481U true JPS58118481U (en) | 1983-08-12 |
Family
ID=30027606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1516482U Pending JPS58118481U (en) | 1982-02-08 | 1982-02-08 | Light source control device for transmitted light type display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58118481U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6026990A (en) * | 1983-07-25 | 1985-02-09 | キヤノン株式会社 | Display unit |
| JPH09172664A (en) * | 1995-12-19 | 1997-06-30 | Nec Shizuoka Ltd | Individual selective calling receiver with display |
-
1982
- 1982-02-08 JP JP1516482U patent/JPS58118481U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6026990A (en) * | 1983-07-25 | 1985-02-09 | キヤノン株式会社 | Display unit |
| JPH09172664A (en) * | 1995-12-19 | 1997-06-30 | Nec Shizuoka Ltd | Individual selective calling receiver with display |
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