JPS6060792U

JPS6060792U - CRT brightness correction device

Info

Publication number: JPS6060792U
Application number: JP15303383U
Authority: JP
Inventors: 鬮目　貞夫
Original assignee: 株式会社明電舎
Priority date: 1983-09-30
Filing date: 1983-09-30
Publication date: 1985-04-27

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 drawings]

第１図はスクリーン上に表示された図形を示す説明図、
第２図はカシード電圧の変化とドツトの表示面積の変化
との関徳を示す鏡切間、第３図および第４図および第５
図はともに本考案の一実施例を示し、第３図は概略構成
を示すブロック図、第４図は要部の詳細を示すブロック
図、第５図は回路図である。１１・・・・・・コンパレータ、１２・・・・・・手動
輝度調整回路、１３・・・・・・ＣＲＴ駆動回路、１４
・・・・・・ＣＲＴｌ　１５・・・・・・自動輝度補正
回路、２１・・・・・・利得調整回路、２２・・・・・
・遅延回路、３９・・・・・・利得調整ボリューム、４
１．４２・・・・・・トランジスタ、４４・・・…コン
デンサ。Figure 1 is an explanatory diagram showing the figures displayed on the screen;
Figure 2 shows the relationship between the change in cathode voltage and the change in the dot display area.
Both figures show one embodiment of the present invention; FIG. 3 is a block diagram showing a schematic configuration, FIG. 4 is a block diagram showing details of the main parts, and FIG. 5 is a circuit diagram. 11...Comparator, 12...Manual brightness adjustment circuit, 13...CRT drive circuit, 14
......CRTl 15...Automatic brightness correction circuit, 21...Gain adjustment circuit, 22...
・Delay circuit, 39...Gain adjustment volume, 4
1.42...transistor, 44...capacitor.

Claims

[Scope of utility model registration request]

(1) A comparator that compares the video signal with a reference value, a manual brightness adjustment circuit to which the output signal of this comparator is supplied, and a CR that amplifies the output signal of this manual brightness adjustment circuit.
What is claimed is: 1. A CRT brightness correction device comprising: a CRT display driving device comprising a CRT driving circuit, wherein an automatic brightness correction circuit for automatically controlling the brightness of the CRT is connected between input and output terminals of the CRT driving circuit. (2) The utility model registration request, wherein the automatic brightness correction circuit comprises a gain adjustment circuit that adjusts the output level of the CRT drive circuit, and a delay circuit that delays the output of the gain adjustment circuit. A brightness correction device for a CRT according to the first item.