Color television receiver with character display function
AssigneeSanyo Electric Co., Ltd.
InventorYoshinori Nishimura
Life of this patent
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Abstract
A color television receiver has a decoder for producing red, green and blue driving currents which are applied to red, green and blue control circuits, respectively, for combining these three colors to establish one of seven colors on a screen of a cathode ray tube in accordance with a received signal. A current divider is connected between the decoder and each of the red, green and blue control circuits for dividing each of the driving currents into a plurality of current components having different levels. The current components are combined with each other in a combination defined by the received signal for producing a predetermined level of color driving current so that all the colors can be reproduced with a predetermined level of brightness.
Claims6
A color television receiver having red, green and blue control circuits for applying red, green and blue currents to respective color guns of a cathode-ray tube in accordance with a received signal to render the respective brightness of the colors established on a screen of the cathode-ray tube to be equal to each other, said color television receiver including a decoder for producing red, green and blue color signals in the form of bilevel signals in accordance with the received signal, and a current driver means having at least three inputs for receiving the bilevel signals, said current driver means comprising a logic circuit means coupled to said inputs for receiving said bilevel signals from said decoder and for providing bilevel color driving signals in accordance with the received bilevel signals and current generator means coupled to said logic circuit means for receiving the output thereof and for generating a color driving current for each color gun in accordance therewith wherein each driving current is formed of a selected one of or combination of plural current components having different current levels.
A current driver circuit for use with a color cathode-ray tube, having at least three inputs for receiving the bilevel signals, said current driver circuit comprising logic circuit means coupled to said inputs for receiving said bilevel signals and for providing bilevel color driving signals in accordance with the received bilevel signals and current generator means coupled to said logic circuit means for receiving the output thereof and for generating red, green and blue driving currents in accordance therewith wherein each of the driving currents is formed of a selected one of or combination of plural current components having different current levels.
Dependencies are inferred from the claim text.