Patent ID: 8207955
Filing Date: 2012-06-26
Classification: G09G

Abstract:
1. An image compensation device comprising: a light sensor which measures an intensity of ambient light incident on a display panel; a first storage unit configured to store a reflectance of the display panel; a first transform unit configured to convert a value obtained by multiplying the intensity of the ambient light by a reflection ratio to a value of the same form as a first gradation value to be applied to the display panel, and acquire a second gradation value; a subtracter which subtracts the second gradation value from a third gradation value obtained through a first inverse transform corresponding to gamma correction already performed on the first gradation value, and acquires a fourth gradation value; a second transform unit configured to perform a second inverse transform corresponding to a display characteristic of the display panel on the fourth gradation value, and acquire a fifth gradation value; a second storage unit configured to store a first look-up table in which the fifth gradation value is associated with the first gradation value, as a correction value which should be applied to the display panel in place of the first gradation value; and a compensation unit configured to use the first look-up table, and compensate an image input to the display panel.