Apparatus and method for calibrating a video display about a mul

Details Apparatus and method for calibrating a video display about a mul Apparatus and method for calibrating a video display about a mul

1997-06-04

2000-05-02

Kostak, Victor R.

Television

Monitoring, testing, or measuring

Testing of image reproducer

348807, 348181, H04N 1700

Patent

active

060578815

ABSTRACT:
A system and method for performing convergence calibration, wherein the test patterns generated during the convergence procedure illuminate only one convergence sensor at a time. Since only one sensor is illuminated at a time, there is no need to switch among sensors in order to obtain sensor readings, and the sensors can share an A/D converter without such switching. Therefore, in a convergence apparatus according to the invention two or more sensor couplings are simply coupled to a shared coupling which is, in turn, coupled to the input of a shared A/D converter. Thus, no switching circuitry is required, it is not necessary to perform a sensor/sensor coupling association routine, and there is no need for a convergence subsystem memory.

REFERENCES:
patent: 4857998 (1989-08-01), Tsujihara et al.
patent: 4999703 (1991-03-01), Henderson

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