Monitor television receiver

Details Monitor television receiver Monitor television receiver

1991-07-11

1993-10-26

Kostak, Victor R.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 56, H04N 1702

Patent

active

052570967

ABSTRACT:
A monitor television receiver for displaying or supplying a color video output has a circuit for measuring the cathode currents of electron guns for three primary colors in a cathode-ray tube. A memory stores coefficients to form functional expressions relative to the cathode currents and the luminance and also stores chromaticity points of three-color fluorescers. An input receives color temperature data and luminance data from external sources, and an arithmetic unit calculates the luminances of the three-color fluorescers corresponding to the input luminance data and color temperature data and also calculates the cathode currents of the electron guns corresponding to the color temperature data and the luminance data from the input. A CRT drive circuit is controlled in such a manner that the measured cathode currents are rendered coincident with the cathode currents calculated by the arithmetic unit. Automatic white balance control can thus be performed without the necessity of using an expensive optical sensor or the like.

REFERENCES:
patent: 4706108 (1987-11-01), Kumagai et al.
patent: 4742387 (1988-05-01), Oshima
patent: 4746970 (1988-05-01), Hosokawa et al.
patent: 4814858 (1989-03-01), Mochizuki et al.
patent: 5049791 (1991-09-01), Kawakami

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