发明名称 |
Luminance level control device |
摘要 |
A scene change detecting circuit (1) detects a scene change of video. An average luminance level operating circuit (2) calculates an average luminance level (APL) of a video signal (VD). A luminance overdrive amount calculating circuit (3) calculates a luminance overdrive amount (OD) based on the average luminance level (APL). A time-linked attenuating circuit (7) outputs a power consumption limit correction amount (PA) by attenuating the luminance overdrive amount (OD) with an elapse of time from a point in time of detecting the scene change. An adder (8) adds the power consumption limit correction amount (PA) and a reference power consumption limit value (Lp) to output the addition result as a power consumption limit amount (PL). An ABL circuit (4) calculates a luminance limit amount (BL) based on luminance limit characteristics, the average luminance level (APL) and the power consumption limit amount (PL). A luminance level control circuit (5) determines a display drive condition (BC) based on the luminance limit amount (BL). A PDP drive controller (6) drives a display panel (20) based on the video signal (VD) and the display driving condition (BC). |
申请公布号 |
US8130325(B2) |
申请公布日期 |
2012.03.06 |
申请号 |
US20070446039 |
申请日期 |
2007.11.26 |
申请人 |
IWAKURA NORIYUKI;TAKETANI NOBUO;YAMASHITA TAKERU;TOZAKI SHOZO;OOTOMO TAKASHI;YOSHINARI HIROSHI;PANASONIC CORPORATION |
发明人 |
IWAKURA NORIYUKI;TAKETANI NOBUO;YAMASHITA TAKERU;TOZAKI SHOZO;OOTOMO TAKASHI;YOSHINARI HIROSHI |
分类号 |
H04N5/57;G09G3/288;H04N5/14 |
主分类号 |
H04N5/57 |
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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