Invention Application
- Patent Title: VIDEO DISPLAY DEVICE
- Patent Title (中): 视频显示设备
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Application No.: US13057309Application Date: 2009-08-27
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Publication No.: US20110199541A1Publication Date: 2011-08-18
- Inventor: Toshiyuki Fujine , Takashi Kanda , Toshiyuki Gotoh , Naoko Kondoh
- Applicant: Toshiyuki Fujine , Takashi Kanda , Toshiyuki Gotoh , Naoko Kondoh
- Applicant Address: JP Osaka-shi, Osaka
- Assignee: SHARP KABUSHIKI KAISHA
- Current Assignee: SHARP KABUSHIKI KAISHA
- Current Assignee Address: JP Osaka-shi, Osaka
- Priority: JP2008-220879 20080829
- International Application: PCT/JP2009/064916 WO 20090827
- Main IPC: H04N9/64
- IPC: H04N9/64

Abstract:
When conducting video display with a wide color gamut display based on a video signal conforming to a standard (sRGB standard and the like) having a color reproduction range narrower than that of the wide color gamut display, the video processing circuit 2 corrects a color in a prescribed correction target color range partly including a red hue reference range as a center part in the color range of an equal hue from achromatic colors having the lowest saturation to red having the highest saturation in an expanded color reproduction range but not including red having the highest saturation in the expanded color reproduction range, so that the hue may change to a hue akin to yellow in the expanded color reproduction range. In so doing, the hue in the red hue reference range changes to red hue in the color reproduction range conforming to the sRBG standard. Furthermore, the hue change ratio into the hue akin to yellow becomes smaller in a color having a long distance from the red hue reference range in the expanded color reproduction range than a color having a distance close thereto. As a result, the wide color gamut display displayable of bright red having a high saturation can be fully utilized, while at the same time solving the problem of hue displacement in displaying red having an intermediate saturation.
Public/Granted literature
- US08860746B2 Video display device Public/Granted day:2014-10-14
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