公开(公告)号：US09530357B2

公开(公告)日：2016-12-27

申请号：US14835128

申请日：2015-08-25

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： In-Suk Kim ,  Byung-Hun Han ,  Jae-Hyuck Woo

IPC: G09G1/00 ,  G09G3/32

CPC classification number: G09G3/3291 ,  G09G3/3208 ,  G09G3/3225 ,  G09G2310/027 ,  G09G2320/043 ,  G09G2320/0673 ,  G09G2330/028

Abstract: A gradation voltage generator for applying a gradation voltage according to gamma characteristics of a display panel includes a reference gamma selector that receives a maximum reference voltage, a minimum reference voltage, and a first reference voltage, and selects and outputs a maximum gamma voltage and a minimum gamma voltage from among voltages between the maximum reference voltage and the minimum reference voltage, wherein when the maximum reference voltage changes, the minimum gamma voltage is compensated by a difference the changed maximum reference voltage and the first reference voltage and a gamma curve controller that receives the maximum gamma voltage and the minimum gamma voltage, and generates and outputs a plurality of gradation voltages.