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IMAGE DISPLAY DEVICE

  • US 20100265281A1
  • Filed: 04/08/2010
  • Published: 10/21/2010
  • Est. Priority Date: 04/15/2009
  • Status: Abandoned Application
First Claim
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1. An image display device comprising:

  • a light source section having a plurality of light emitting subsections configured to be controlled independently of each other, each of the light emitting subsections emitting multiple kinds of color light;

    a display panel modulating color light emitted from the light source section based on an input picture signal; and

    a display control section controlling the light emitting subsections of the light source section and the display panel, so that an input frame image configured of the input picture signal is decomposed into a plurality of field images, and so that the plurality of field images are time-divisionally displayed in a field sequential manner,wherein the display control section includesa subsection-drive processing section applying a predetermined resolution-lowering process on the input picture signal, thereby generating a light emission pattern based on a result of the resolution-lowering process, the light emission pattern being to be formed through selective light emitting operations of the plurality of light emitting subsections of the light source section, and then the subsection-drive processing section performing a dividing operation in which a signal level of each pixel signal in the input picture signal is divided by an emission-level of corresponding light emitting subsection in the light emission pattern, thereby generating a subsection-drive picture signal as a result of the dividing operation,a signal analysis section analyzing color components of a subsection-drive frame image configured of the subsection-drive picture signal, to extract a first common luminance portion from the subsection-drive frame image, the first common luminance portion having a luminance magnitude common to two or more of three primary-color components configured of red, green, and blue components,a signal output section obtaining a first differential image for each of the three primary-color components by subtracting the first common luminance portion from the subsection-drive frame image, and sequentially outputting, as the plurality of field images, the first differential images for the primary-color components and a first common image which is configured of the first common luminance portion to the display panel in a time-divisional manner, anda color light selection section selecting color light to be emitted from the light source section based on the light emission pattern and the first common image, so that, in each of first field periods where the first differential images for the primary color components are outputted respectively, only corresponding primary color light is emitted, and in a second field period where the first common image is outputted, multiple kinds of primary color light, corresponding to the two or more primary-color components which configure the first common luminance portion, are emitted together.

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