Invention Grant
- Patent Title: Liquid crystal display panel and liquid crystal display device with backlight chromaticity balance
- Patent Title (中): 液晶显示面板和液晶显示装置,具有背光色度平衡
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Application No.: US13715960Application Date: 2012-12-14
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Publication No.: US09024923B2Publication Date: 2015-05-05
- Inventor: Takahiro Kobayashi , Yoshio Umeda , Katuji Tanaka
- Applicant: Panasonic Liquid Crystal Display Co., Ltd. , Panasonic Corporation
- Applicant Address: JP Hyogo JP Osaka
- Assignee: Panasonic Liquid Crystal Display Co., Ltd.,Panasonic Corporation
- Current Assignee: Panasonic Liquid Crystal Display Co., Ltd.,Panasonic Corporation
- Current Assignee Address: JP Hyogo JP Osaka
- Agency: McDermott Will & Emery LLP
- Priority: JP2011-273569 20111214
- Main IPC: G09G3/34
- IPC: G09G3/34 ; F21V8/00 ; G09G5/00 ; G02F1/1335

Abstract:
The liquid crystal display panel includes a liquid crystal display unit, and a backlight unit illuminating the liquid crystal display unit. The backlight unit includes first and second white light-emitting diodes that respectively emit white light, and first and second drive units that respectively supply a current to the first and second white light-emitting diodes. The first and second drive units are respectively configured to be able to adjust supply current to the first and second white light-emitting diodes. Chromaticities of the first and second white light-emitting diodes are of a relationship of being positioned opposite each other across a blackbody locus on an xy chromaticity diagram. The first and second white light-emitting diodes change over time so that, on the xy chromaticity diagram, an intersection point of the blackbody locus and a line that passes through the chromaticities of the first and second white light-emitting diodes becomes constant.
Public/Granted literature
- US20130155040A1 LIQUID CRYSTAL DISPLAY PANEL AND LIQUID CRYSTAL DISPLAY DEVICE Public/Granted day:2013-06-20
Information query
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