KR20020095883A - Device for explaning a color tone of TV - Google Patents

Abstract

PURPOSE: A television color displaying device is provided to separately output white and black signals from color signals to a CRT to improve the color of images of a television. CONSTITUTION: A television color displaying device includes an image circuit part(1) for outputting white and black signals and color signals, a white and black circuit part(2)for separating and outputting the white and black signals among image signals output from the image circuit part, a matrix circuit part(3) for separating and outputting color signals among image signals output from the image circuit part, and a synthesizing circuit part(4) for receiving the white and black signals output from the white and black circuit part and the image signals output from the matrix circuit part to output to a CRT(5).

Description

Device for exploring a color tone of TV

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color expressing apparatus of a television. More particularly, the color representation of a television which can improve the color of an image of a television by separating the black and white signals and the color signals output from a video circuit into a CRT and outputting them separately. Relates to a device.

In the prior art, as shown in Fig. 1, in expressing the color of an image, the I-axis signal I of the color coordinates for the color representation output from the video circuit 1 and the Q-axis signal of the color coordinates for the color representation ( Colors are expressed by applying R, G, and B color signals to the CRT 3 through a matrix circuit (matrix conversion circuit) 2 that converts Q) into color signals RY, GY, BY.

Therefore, the conventional color control device expresses color through the matrix 2 of the monochrome signal and the color signal output from the image circuit 1, so that the color of the color is unnatural, that is, among the monochrome signals. For example, when the resolution is high (black and white signal), for example, a very fine checkered picture, the color is flashing even though it is a black and white signal (color burst 3Mhz ~ 4Mhz).

This is caused by the parallel processing of the monochrome signal and the color signal in the matrix circuit 2, which is a problem.

Therefore, an object of the present invention is to enable a more natural color representation and improvement.

In order to achieve the above object, the present invention includes a black and white signal circuit for outputting a black and white signal to the video signal output through the video circuit; A matrix circuit for outputting only color signals; Characterized in that it comprises a composite circuit for outputting the separated black and white and color signals to the CRT, respectively.

By separating the black and white signal and the color signal as described above, since the color of the black and white signal is not flickered during the delicate image processing, the image quality can be improved.

1 is a block diagram of a color representation apparatus of a conventional television

2 is a block diagram of a color representation apparatus of the present invention television

Explanation of symbols on the main parts of the drawings

1; video circuit 2; Monochrome Signal Circuit

3; Matrix circuit 4; Synthetic Circuit

5; CRT

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

An image circuit 20 for outputting a monochrome signal and a color signal; A black and white circuit 21 for separating and outputting only the black and white signal among the video signals output from the video circuit 20; A matrix circuit 22 for separating and outputting only the color signal among the video signals output from the video circuit 20; It is composed of a composite circuit 23 for receiving the black and white signal output from the black and white circuit 21 and the video signal output to the matrix circuit 22 and separately outputs to the CRT (24).

According to the present invention configured as described above, the black and white signal of the video signal output to the video circuit 20 is separated through the black and white circuit 21, the color signal is separated through the matrix circuit 22, the separated black and white signal and the color The signal is separated and output to the CRT 24 through the synthesis circuit 23. The color signal filters only the low-pass color signal through the internal low pass filter of the matrix circuit 22 and the monochrome signal through the synthesis circuit 23. The color signal is separated into the color signal and output to the CRT 25 so that the color screen becomes clear and the resolution is improved.

The circuit may be configured as a separate one chip integrated circuit (IC).

As described above, the present invention separates the black and white signals and the color signals output from the video conference so that the respective signals are output to the CRT, thereby preventing the glare of the color in advance, and the color of the screen is filtered. It is possible to compensate for the dark and spread signals due to the effect that can provide a brighter and clearer beautiful picture.

Claims (1)

An image circuit for outputting a monochrome signal and a color signal; A black and white circuit for outputting only a black and white signal of the video signals output from the video circuit; A matrix circuit for outputting only color signals of the video signals output from the video circuits; And a composite circuit which receives the monochrome signal output from the monochrome circuit and the image signal output to the matrix circuit and separately outputs them to the CRT.