| CPC G09G 3/2007 (2013.01) [G09G 3/3233 (2013.01); G09G 3/3275 (2013.01); G09G 2310/027 (2013.01); G09G 2330/023 (2013.01); G09G 2330/028 (2013.01)] | 15 Claims |
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1. A display device comprising:
a plurality of blocks, each block including two or more pixels, all of the blocks being commonly coupled to a single first power line; and
a first power voltage controller configured to determine a margin value of a first power voltage supplied to the single first power line based on load values of the blocks,
wherein the first power voltage controller determines the load values based on grayscale values of the pixels included in each of the blocks,
wherein a magnitude of the first power voltage is determined to become smaller as the margin value becomes larger,
wherein the margin value includes a first margin value,
wherein the first power voltage controller determines the first margin value according to a degree of distribution of load values of first blocks commonly coupled to the single first power line receiving the first power voltage in common and arranged in a first direction,
wherein the first power voltage controller includes a reference block row selector which selects a reference block row of the first blocks based on the load values of all of the blocks,
wherein the reference block row selector provides the degree of distribution of load values of first blocks,
wherein the first power voltage controller further includes a plurality of distribution lookup tables,
wherein the first power voltage controller selects one of the distribution lookup tables according to the degree of distribution of load values of first blocks, and
wherein the first power voltage controller extracts the first margin value from a selected distribution lookup table based on an average value or maximum value of the load values of the first blocks.
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