Patent ID: 9466256
Filing Date: 2016-10-11
CPC Classification: G09G

Claim Text:
1. A gamma voltage generating circuit, comprising: an output end, a first reference voltage input end, a second reference voltage input end, a pre-stage voltage-dividing circuit having a first pre-stage output end and a second pre-stage output end, and a post-stage voltage-dividing circuit having a first post-stage input end, a second post-stage input end and a post-stage output end, wherein the first reference voltage input end and the second reference voltage input end are coupled to the pre-stage voltage-dividing circuit respectively, the pre-stage voltage-dividing circuit is coupled to the post-stage voltage-dividing circuit, and the post-stage voltage-dividing circuit is coupled to the output end of the gamma voltage generating circuit; the first pre-stage output end of the pre-stage voltage-dividing circuit is coupled to the first post-stage input end, and the second pre-stage output end of the pre-stage voltage-dividing circuit is coupled to the second post-stage input end, so as to divide reference voltages input from the first reference voltage input end and the second reference voltage input end, respectively, thereby to generate a primary gamma voltage; and the post-stage output end of the post-stage voltage-dividing circuit is coupled to the output end of the gamma voltage generating circuit, so as to divide the primary gamma voltage, thereby to generate a secondary gamma voltage, wherein the pre-stage voltage-dividing circuit comprises N+1 pre-stage resistors composed of the O