发明名称 |
Control of a back light of a liquid crystal device |
摘要 |
An area control section individually sets illumination intensity (light control value) of each backlight cell corresponding to each area of the display screen. A spatial filter corrects the light control values so that spatial distribution of the light control values becomes more moderate between adjoining areas. A black area control section sets the minimum value of the light control value based on a "black area" in the screen. A power control section corrects the light control values so that power consumption of the backlight does not exceed a limit value. A shading control section corrects the light control values to relatively lower brightness in the peripheral part of the screen compared to the central part of the screen. A micro-controller switches the operations of the above light control value correcting sections according to an image display mode selected by the user. |
申请公布号 |
EP2390871(A2) |
申请公布日期 |
2011.11.30 |
申请号 |
EP20110163503 |
申请日期 |
2011.04.21 |
申请人 |
HITACHI CONSUMER ELECTRONICS CO. LTD. |
发明人 |
KUBOTA, HIDENAO;TSURU, YASUTAKA |
分类号 |
G09G3/34 |
主分类号 |
G09G3/34 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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