JPH03122425U - - Google Patents
Info
- Publication number
- JPH03122425U JPH03122425U JP1990030965U JP3096590U JPH03122425U JP H03122425 U JPH03122425 U JP H03122425U JP 1990030965 U JP1990030965 U JP 1990030965U JP 3096590 U JP3096590 U JP 3096590U JP H03122425 U JPH03122425 U JP H03122425U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- brightness
- amount
- adjustment
- screen
- 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
- 238000001514 detection method Methods 0.000 claims description 6
- 239000004973 liquid crystal related substance Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of Gas Discharge Display Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
- Transforming Electric Information Into Light Information (AREA)
Description
第１図は本考案の実施例を示すブロツク図、第
２図は従来のデイスプレイ装置を示すブロツク図
、第３図は電流制御回路の入出力特性を示すグラ
フである。
１……液晶モジユール、２……光源、３……輝
度調節回路、４……電流制御回路、５……外光量
検出回路、６……外光量記憶回路、７……画面輝
度回路、８……画面輝度記憶回路、９……比較回
路、１０……補正比較回路、１１……選択回路。
FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing a conventional display device, and FIG. 3 is a graph showing input/output characteristics of a current control circuit. DESCRIPTION OF SYMBOLS 1...Liquid crystal module, 2...Light source, 3...Brightness adjustment circuit, 4...Current control circuit, 5...External light amount detection circuit, 6...External light amount storage circuit, 7...Screen brightness circuit, 8... ...Screen brightness storage circuit, 9...Comparison circuit, 10...Correction comparison circuit, 11...Selection circuit.
Claims (1)
輝度調節回路と、 輝度調節回路によつて設定された電圧値に対応
する電流を光源に出力する電流制御回路と、 外光の光量を検出する外光量検出回路と、 外光量検出回路の検出値を記憶する外光量記憶
回路と、 液晶モジユールの画面輝度を検出する画面輝度
検出回路と、 画面輝度検出回路の検出値を記憶する画面輝度
記憶回路と、 外光量記憶回路が記憶した外光の光量の値と画
面輝度記憶回路が記憶した画面輝度の値を比較し
て調節量を求める比較回路と、 外光量検出回路が検出している外光量と比較回
路が求めた調節量とを比較して調節量を補正する
補正比較回路と、 補正比較回路の出力と輝度調節回路の出力とが
入力され、選択信号によつていずれかの出力を選
択して電流制御回路に出力させる選択回路とを備
えたことを特徴とするデイスプレイ装置。[Scope of claim for utility model registration] A liquid crystal module that constitutes a screen, a light source that provides screen brightness to the liquid crystal module, a brightness adjustment circuit that sets a voltage value to adjust the screen brightness, and a brightness adjustment circuit. A current control circuit that outputs a current corresponding to a set voltage value to the light source, an outside light amount detection circuit that detects the amount of outside light, an outside light amount storage circuit that stores the detected value of the outside light amount detection circuit, and a liquid crystal module. a screen brightness detection circuit that detects the screen brightness of the screen; a screen brightness storage circuit that stores the detected value of the screen brightness detection circuit; A comparison circuit that compares brightness values to determine the amount of adjustment; a correction comparison circuit that compares the amount of external light detected by the outside light amount detection circuit with the amount of adjustment determined by the comparison circuit to correct the amount of adjustment; 1. A display device comprising a selection circuit which receives an output of a comparison circuit and an output of a brightness adjustment circuit, and selects one of the outputs according to a selection signal to output the selected output to a current control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990030965U JPH03122425U (en) | 1990-03-28 | 1990-03-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990030965U JPH03122425U (en) | 1990-03-28 | 1990-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03122425U true JPH03122425U (en) | 1991-12-13 |
Family
ID=31533690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990030965U Pending JPH03122425U (en) | 1990-03-28 | 1990-03-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03122425U (en) |
-
1990
- 1990-03-28 JP JP1990030965U patent/JPH03122425U/ja active Pending
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