Method of performing convergence calibration for a display
AssigneeChunghwa Picture Tubes, Ltd.
InventorsWen-Chih Tai, Ming-Tsung Ho, Chia-Lin Liu, Chi-Neng Mo
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Abstract
A convergence calibration method for a display includes generating a test pattern of similar width with respect to a sensor and expanding the area of the test pattern from one side of the sensor until the whole sensor is illuminated. During the process of expanding the test pattern, the sensor continues to measure signals from the test patterns. Based on the maximum energy measured by the sensor, a digital judgment is performed for calculating convergence parameters.
Claims18
A method of performing convergence calibration for a display using multiple beams to generate a video display on a screen, comprising the steps of:
- (a) projecting a reference pattern onto a sensor having a plurality of sensing sections and expanding a first area of the reference pattern from a first side of the sensor;
- (b) measuring first image signals with the plurality of sensing sections of the sensor from the reference pattern while performing step (a);
- (c) outputting first image signals measured by each of the plurality of sensing sections of the sensor in step (b);
- (d) projecting a reference pattern onto the sensor and expanding a second area of the reference pattern from a second side of a sensor;
- (e) measuring second image signals with the plurality of sensing sections of the sensor from the reference pattern while performing step (d);
- (f) outputting second image signals measured by each of the plurality of sensing sections of the sensor in step (e);
- and
- (g) generating parameters of the display system based on a sum of the first and second image signals outputted in step (c) and (f) for adjusting images of the display.
A method of performing convergence calibration for a display using multiple beams to generate a video display on a screen, comprising the steps of:
- (a) projecting a reference pattern onto a sensor having a plurality of sensing sections and expanding a first area of the reference pattern from a first side of the sensor;
- (b) measuring first image signals with the plurality of sensing sections of the sensor from the reference pattern while performing step (a);
- (c) outputting first image signals measured by each of the plurality of sensing sections of the sensor in step (b);
- (d) projecting a reference pattern onto the sensor and expanding a second area of the reference pattern from a second side of a sensor, wherein the first side of the sensor and the second side of the sensor are on opposite sides of the sensor;
- (e) measuring second image signals with the plurality of sensing sections of the sensor from the reference pattern while performing step (d);
- (f) outputting second image signals measured by each of the plurality of sensing sections of the sensor in step (e);
- and
- (g) generating parameters of the display system based on a sum of the first and second image signals outputted in step (c) and (f) for adjusting images of the display.
Dependencies are inferred from the claim text.