KR980005243A

KR980005243A - Calibration Method for Convergence Measurement of Color Cathode Ray Tubes

Info

Publication number: KR980005243A
Application number: KR1019960023677A
Authority: KR
Inventors: 변상두; 안동옥
Original assignee: 김광호; 삼성전자 주식회사
Priority date: 1996-06-25
Filing date: 1996-06-25
Publication date: 1998-03-30
Also published as: KR100188668B1

Abstract

본 발명은 광센서를 이용한 칼라 음극선관의 컨버젼스 계측을 위한 켈리브레이션 방법에 관하여 개시한 것이다. 본 발명에 의한 켈리브레이션 방법의 특징에 따르면, 칼라 음극선관의 화면 전방에 배치된 다수의 광센서들 중에서 켈리브레이션을 위한 기준 광센서를 설정하고, 이 기준 광센서간의 실제 기구적인 수평 및 수직 길이를 화면분할 방법에 의해 측정한 다음, 이를 토대로 기준 광센서간의 픽셀 수를 정확하게 측정함으로써, 칼라 음극선관의 컨버젼스 계측을 위한 기준이 되는 화면 해상도에 따른 수평 및 수직방향의 1픽셀당 실제 길이를 정확하게 측정하여 컨버젼스 계측 결과에 대한 정밀도를 향상시킬 수 있도록 한 것이다.The present invention discloses a calibration method for the convergence measurement of a color cathode ray tube using an optical sensor. According to a feature of the calibration method according to the present invention, among a plurality of optical sensors arranged in front of the screen of the color cathode ray tube, a reference optical sensor for calibration is set, and the actual mechanical horizontal and vertical length between the reference optical sensors is displayed. Measured by the dividing method, and then accurately measuring the number of pixels between the reference optical sensors based on this, and accurately measuring the actual length per pixel in the horizontal and vertical directions according to the screen resolution as a reference for the convergence measurement of the color cathode ray tube This is to improve the accuracy of convergence measurement results.

Description

Calibration Method for Convergence Measurement of Color Cathode Ray Tubes

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제3도는 광센서를 이용한 칼라 음극선관의 컨버젼스 계측 시스템을 나타내 보인 개략적 구성도이다.3 is a schematic diagram illustrating a convergence measurement system of a color cathode ray tube using an optical sensor.

제4도는 본 발명에 의한 켈리브레이션 방법에 있어서의 기준 광센서 배치도이다.4 is a layout view of a reference light sensor in the calibration method according to the present invention.

제5도는 본 발명에 의한 켈리브레이션 방법에 있어서의 칼라 음극선관의 화면 어드레스 체제를 보인 상태도이다.5 is a state diagram showing the screen address system of the color cathode ray tube in the calibration method according to the present invention.

제6도는 본 발명에 의한 켈리브레이션 방법에 있어서의 칼라 음극선관의 화면 수평 분할 상태도이다.6 is a screen horizontal division state diagram of the color cathode ray tube in the calibration method according to the present invention.

제7도는 제6도에 도시된 수평 분할 상태 화면에서 경계선에 배치되는 광센서를 도시한 상태도이다.FIG. 7 is a state diagram illustrating an optical sensor disposed at a boundary line in the horizontal divisional state screen shown in FIG.

제8도는 제6도에 도시된 수평 분할 상태 화면의 수평 어드레스 코드 생성표이다.FIG. 8 is a horizontal address code generation table of the horizontal division status screen shown in FIG.

Claims

Displaying a split pattern image on a screen of a color cathode ray tube to recognize a position of a plurality of optical sensors arranged in front of the screen by screen division; A second step of calculating position coordinate values for the plurality of optical sensors by displaying an image of a convergence measurement pattern on a screen of the color cathode ray tube; A third step of calculating pixel values between the horizontal and the vertical of the screen based on the position coordinate values of the respective optical sensors calculated in the second step; And a fourth step of calculating a length per pixel by dividing the vertical and horizontal lengths between the respective optical sensors by the pixel values calculated in the third step. 2.

2. The method of claim 1, wherein the screen division in the first step is performed sequentially from an image pattern of two parts into an image pattern of 2 ^a (n = natural number). Calibration method.

The screen splitting apparatus of claim 1, wherein the screen division in the first step proceeds sequentially from an image pattern of two equal parts to an image pattern of 2 ^a (n = natural numbers). A calibration method for measuring the convergence of the color cathode ray tube, characterized in that the screen division is completed in the position.

4. The calibration method of claim 1, wherein the screen division in the first step comprises a horizontal division step and a vertical division step.

4. The calibration method according to claim 1, wherein the image pattern divided in the first step is displayed as an image pattern in which black and white are alternated.

The method of claim 1, wherein in the first step, setting a reference optical sensor for calibration by mechanically fixing an optical sensor having a quantity within a range of 30 to 40% of the plurality of optical sensors located at the center of the screen. A calibration method for measuring the convergence of colored cathode ray tubes.

The calibration method according to claim 1 or 6, wherein in the first step, at least three or more optical sensors of the reference optical sensors are selected and calibrated.

The calibration method according to claim 1, wherein the horizontal and vertical calibration lengths calculated in the fourth step are calculated by the following equations (a) and (b).

Horizontal calibration length = Hm / Hp [mm / pixel] ------ (a)

Vertical Calibration Length = Vm / Vp [mm / pixel] ------ (b)

{Hm; Actual mechanical horizontal length between light sensors}

{Vm: actual mechanical vertical length between light sensors}

{Hp; Number of horizontal pixels between optical sensors calculated by screen division method}

{Vp; Number of vertical pixels between light sensors calculated by screen division method}

※ Note: The disclosure is based on the initial application.