JPH0457977U

JPH0457977U -

Info

Publication number: JPH0457977U
Application number: JP9931290U
Authority: JP
Priority date: 1990-09-21
Filing date: 1990-09-21
Publication date: 1992-05-19

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示すインタフエー
ス集積回路のコントラスト可変回路ブロツク図、
第２図は従来のインタフエース集積回路のコント
ラスト可変ブロツク図、第３図は従来のインタフ
エース集積回路のコントラストおよび明るさ可変
ブロツク図である。１ａ，１ｂ，１ｃは輝度信号Ｙおよび色差信号
Ｒ−Ｙ，Ｂ−Ｙの利得を調整する可変利得増幅器
、４はマトリクス２用インタフエース集積回路、
３はコントラスト可変回路、５は明るさ可変回路
である。 FIG. 1 is a block diagram of a contrast variable circuit of an interface integrated circuit showing an embodiment of the present invention;
FIG. 2 is a block diagram of a conventional interface integrated circuit with variable contrast, and FIG. 3 is a block diagram of a conventional interface integrated circuit with variable contrast and brightness. 1a, 1b, 1c are variable gain amplifiers that adjust the gains of the luminance signal Y and the color difference signals R-Y, B-Y; 4 is an interface integrated circuit for matrix 2;
3 is a contrast variable circuit, and 5 is a brightness variable circuit.

Claims

[Scope of utility model registration request]

In color signal processing circuits such as clear vision,
Input only the input luminance signal Y and the color difference signals R-Y and B-Y to suppress the contrast.
To the luminance signal Y and color difference signal R-Y, B-Y input terminal of the matrix interface integrated circuit that outputs the B primary color signal or the matrix interface integrated circuit that simultaneously controls the contrast and brightness of each output RGB primary color signal. A variable contrast circuit consisting of a variable gain amplifier connected to each.