Patent ID: 9196188
Filing Date: 2015-11-24
Classification: G09G

Abstract:
1. An image display apparatus comprising: a light source; a display panel unit configured to control a transmittance of light from the light source based on an image data; an image processing unit configured to divide each frame of an input image data into a plurality of sub-frames, and to output the image data of the plurality of sub-frames to the display panel unit at a frame rate higher than that of the input image data; and a light source control unit configured to control a light quantity of the light source, the image processing unit including: a control unit configured to output a filter coefficient for each sub-frame; a filter unit configured to perform high frequency emphasis processing for emphasizing a spatial high-frequency component with the filter coefficient given from the control unit on the image data of a first sub-frame among the plurality of sub-frames so that the filter coefficient is larger, the spatial high-frequency component of the image data of the first sub-frame is more emphasized, and to perform high frequency suppression processing for suppressing a spatial high-frequency component on the image data of a second sub-frame different from the first sub-frame; and an adjustment unit configured to perform level adjustment processing on the high-frequency-emphasized image data of the first sub-frame using a first level compression/expansion coefficient which decreases as the filter coefficient given from the control unit increases, and to perform level adjustment processing on the high-frequency-suppressed image data of the second sub-frame using a second level compression/expansion coefficient different from the first level compression/expansion coefficient, and the light source control unit controls the light quantity of the light source during a period of a sub-frame in which the image data subjected to the level adjustment processing is outputted, in accordance with the level adjustment performed on the sub-frame.