JPS606128U

JPS606128U - liquid crystal display device

Info

Publication number: JPS606128U
Application number: JP6583784U
Authority: JP
Inventors: 稔細川; 勝幸池田; 矢沢　悟
Original assignee: セイコーエプソン株式会社
Priority date: 1984-05-04
Filing date: 1984-05-04
Publication date: 1985-01-17
Also published as: JPS619378Y2

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

[Brief explanation of the drawing]

第１図は、液晶表示体の電圧とコントラスト相関。第２
図は、従来の駆動電圧温度補正回路例。第３図は、本考案になるパネル断面図。第４図は、本考
案になる制御系統ブロック図。第５図は、本考案になる
液晶印加電圧と表示コントラストとの相関図例。第６図
は、検出制御回路図。第７．８図は、第５，６図に関連
した電圧コントラスト相関図。１・・・・・・電圧コントラスト曲線、１５・・・・・
・温度検出器、１６・・・・・・液晶駆動回路、２６・
・・・・・表示コントラスト検出器（光センサ）、２８
・・・・・・表示部、２９・・・・・・検出器、４５・
・・・・・液晶印加信号、３９゜４０、　４１．　４２
・・・・・・差動増幅器。Figure 1 shows the relationship between voltage and contrast of a liquid crystal display. Second
The figure shows an example of a conventional drive voltage temperature correction circuit. FIG. 3 is a sectional view of the panel according to the present invention. FIG. 4 is a block diagram of the control system according to the present invention. FIG. 5 is an example of a correlation diagram between liquid crystal applied voltage and display contrast according to the present invention. FIG. 6 is a detection control circuit diagram. Figure 7.8 is a voltage contrast correlation diagram related to Figures 5 and 6. 1... Voltage contrast curve, 15...
・Temperature detector, 16...Liquid crystal drive circuit, 26・
...Display contrast detector (light sensor), 28
... Display section, 29 ... Detector, 45.
...Liquid crystal applied signal, 39°40, 41. 42
...Differential amplifier.

Claims

[Scope of utility model registration request]

In a liquid crystal display device in which a liquid crystal is sandwiched between a plurality of opposing electrodes, a detection means detects the amount of transmitted light from the liquid crystal, and a signal is generated proportional to the difference between a maximum output and an intermediate output from the detection means. a first amplification means, a second amplification means for generating a signal proportional to the difference between the minimum power theory intermediate output from the detection means, an output of the first amplification means, and an output of the second amplification means; third amplifying means for generating an output proportional to the difference between;
A liquid crystal display device comprising comparing means for comparing the output from the third height increasing means with a predetermined constant voltage level, and means for supplying the output of the comparing means to the liquid crystal electrode.