Invention Grant
- Patent Title: Image display device and image display method
- Patent Title (中): 图像显示装置和图像显示方法
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Application No.: US13579876Application Date: 2010-11-17
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Publication No.: US09361835B2Publication Date: 2016-06-07
- Inventor: Tetsuya Ueno , Kohji Fujiwara
- Applicant: Tetsuya Ueno , Kohji Fujiwara
- Applicant Address: JP Osaka-Shi
- Assignee: SHARP KABUSHIKI KAISHA
- Current Assignee: SHARP KABUSHIKI KAISHA
- Current Assignee Address: JP Osaka-Shi
- Agency: Morrison & Foerster LLP
- Priority: JP2010-055395 20100312
- International Application: PCT/JP2010/070442 WO 20101117
- International Announcement: WO2011/111268 WO 20110915
- Main IPC: G09G5/10
- IPC: G09G5/10 ; G09G3/34 ; G09G3/36

Abstract:
In the present liquid crystal display device, an LED output value correction section (513) included in an area-active drive processing section (5) corrects LED data Dbl obtained by an LED output value calculation section (512) with reference to a luminance correction LUT (13), such that the luminance in the area from an intermediate value to near a maximum value shifts to a higher degree. Thus, even if the backlight luminance is low (typically, the mean luminance of an input image is low), contrast ratio is enhanced, thereby preventing a tone jump (insufficient luminance) at high tone levels due to an insufficient backlight luminance.
Public/Granted literature
- US20120320105A1 IMAGE DISPLAY DEVICE AND IMAGE DISPLAY METHOD Public/Granted day:2012-12-20
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