Patent ID: 8659627
Filing Date: 2014-02-25
Classification: G09G

Abstract:
1. A self light emitting display device comprising: an active matrix drive type self light emitting display panel; a necessary brightness calculation unit which calculates a necessary maximum brightness to control light emission of the self light emitting display panel based on a user setting, a circumference environment, or a video signal; a panel driver which drives the self light emitting display panel by changing a maximum voltage supplied to the self light emitting display panel according to the necessary maximum brightness; a storage unit which holds data related to a reverse gamma characteristic that is opposite to a gamma characteristic between an amount of light emitted from the self light emitting display panel and a voltage supplied from the panel driver to the self light emitting display panel; and a panel gamma generation unit which generates an output signal to the panel driver based on the reverse gamma characteristic by changing a range of the reverse gamma characteristic applied to the video signal according to the necessary maximum brightness while maintaining the same gradations in the reverse gamma characteristic after the range of the reverse gamma characteristic changes as gradations in the reverse gamma characteristic that corresponds to a displayable maximum brightness, wherein the panel driver drives the self light emitting display panel based on the output signal, and the range of the reverse gamma characteristic which is changed according to the necessary maximum brightness is determined based on the maximum voltage.