KR970057659A

KR970057659A - Asymmetric Screen Correction Device of Projection Image Display System

Info

Publication number: KR970057659A
Application number: KR1019950054456A
Authority: KR
Inventors: 나대희
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1995-12-22
Filing date: 1995-12-22
Publication date: 1997-07-31

Abstract

본 발명은 투사형 화상표시시스템의 비대칭화면 보정장치에 관한 것으로, 스크린(20)에 투사될 화상신호에서 동기신호를 분리검출하는 동기신호검출부(50)와, 상기 동기신호를 기초로 상기 스크린(20)에 대한 화상 투사각도에 대응하여 보정모드와 상향/하향투사각 및 수평방향의 투사보정량을 제어하는 제어부(40), 그 제어부(40)의 제어하에 생성되는 샘플링신호에 의해 상기 투사될 화상신호를 샘플링하는 화상보정수단(60,70,80), 그 화상보정수단에 의해 샘플링된 화상보정방향의 화상신호에 대한 블랭킹데이터를 합성처리하여 보정데이터를 생성하는 보정데이터형성부(100) 및 그 보정데이터를 저역통과필링하는 저역통과필터(100)를 포함하여 구성되어, 스크린(20)에 대해 화상의 투사각이 상향 또는 하향경사각을 유지하면서 수평방향으로 투사각이 형성되는 경우 그 상향 또는 하향 경사각 및 수평방향에 대한 비대칭화면을 역보정하여 정상적인 화면의 투사가 가능하도록 하는 것이다.The present invention relates to an asymmetric screen correction apparatus of a projection type image display system, comprising: a synchronization signal detection unit (50) for separately detecting a synchronization signal from an image signal to be projected on the screen (20), and the screen (20) based on the synchronization signal. The control unit 40 controls the correction mode, the up / down projection angle, and the horizontal projection correction amount corresponding to the image projection angle with respect to the image projection angle, and the image signal to be projected by the sampling signal generated under the control of the control unit 40. Image correction means 60, 70, and 80 for sampling, correction data forming unit 100 for synthesizing blanking data for image signals in the image correction direction sampled by the image correction means to generate correction data, and correction thereof It comprises a low pass filter 100 for low-passing the data, the projection angle of the image relative to the screen 20 while maintaining the upward or downward tilt angle of the projection angle in the horizontal direction When the correction is to reverse the asymmetric screen for the up- or down-tilt angle and a horizontal direction to allow the projection of the normal screen.

Description

Asymmetric Screen Correction Device of Projection Image Display System

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도(a)와 (b)는 투사형 화상표시시스템에서 비대칭화면이 투사되는 과정과 그 보정화면의 예를 설명하는 도면1 (a) and (b) are diagrams for explaining a process of projecting an asymmetric screen in a projection image display system and an example of the corrected screen;

제3도는 본 발명에 따른 투사형 화상표시시스템에서의 비대칭화면 보정장치를 나타낸 블록구성도3 is a block diagram showing an asymmetric image correction apparatus in a projection image display system according to the present invention.

Claims

The pixel driving means 120 for displaying the color image signal for the image signal and the pixel driven by the pixel driving means 120 are projected on the screen 20 through the projection lens. A projection type image display system having a pixel drive panel, comprising: synchronization signal detecting means (50) for separately detecting a synchronization signal from an image signal to be projected on the screen (20), and the screen (20) based on the synchronization signal; Control means 40 for controlling the correction mode and the up / down projection angle and the horizontal projection correction amount corresponding to the image projection angle with respect to the image projection angle, and the image signal to be projected by the sampling signal generated under the control of the control means 40 Image correction means for sampling an image, blanking processing means 90 for inserting and correcting blanking data for an image signal in an image correction direction sampled by the image correction means, and the image correction means And a correction data generating means 100 for synthesizing the corrected image signal and the blanking data to generate correction data, and a filter means 110 for low-pass filtering the correction data. System asymmetrical screen correction device.

2. The image correction means according to claim 1, wherein the image correction means includes a data converter 60 for digitally converting the image signal and the digitally converted image data under the control of the control means 40. And a data memory (80) for analog-converting the correction data read out from the data memory (70) for recording and reading the pixel by missing the pixel in the horizontal direction toward the axis. Asymmetric screen correction device for projection image display systems.

※ Note: It is to be disclosed based on the initial application.