White balance adjusting system for a color television system
AssigneePioneer Electronic Corporation
InventorAoyama: Tatsuya
Life of this patent
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Abstract
A white balance adjusting system for a color television system has three CRTs for projecting beams of three primary colors, and a color control circut for controlling outputs of the three CRTs. Three sensors are provided adjacent each CRT for detecting quantity of each color light. A memory stores three reference quantities of respective color lights for obtaining a white balance. Each detected quantity of the color light is compared with the reference quantity by a computer. The color control circuit is operated so as to reduce the difference obtained by the comparator to a predetermined value.
Claims4
A white balance adjusting system for a color television system having three projecting means for projecting beams of three primary colors, and a color control circuit for controlling outputs of the three projecting means, the adjusting system comprising:
- light quantity detecting means provided adjacent to each of said projecting means for detecting a quantity of light output from each projecting means;
- memory means for storing three reference quantities of respective color lights for obtaining a white balance;
- comparing means for comparing each detected quantity of the color light with the reference quantity, thereby determining a difference therebetween;
- control means for operating the color control circuit so as to reduce the difference determined by the comparing means to a predetermined value.
Dependencies are inferred from the claim text.