Title:
バックライト駆動回路及びその駆動方法
Document Type and Number:
Japanese Patent JP5036694
Kind Code:
B2
Abstract:
A backlight driving circuit (302) a method for driving the same, which are capable of preventing a flicker phenomenon and delay of response, are disclosed. The backlight driving circuit (302) includes an average data generating unit (511) for dividing a display area of a display panel into n ("n" is a natural number of 2 or more) display regions, and calculating an average value of data supplied to each of the display regions, thereby generating n average data values, a dimming signal generating unit (506) for generating n dimming signals each having a duty ratio based on the average data value of the corresponding display region, and a selective filtering unit (507) for comparing the dimming signals currently supplied for a current frame with the dimming signals previously stored for a previous frame, to determine how abruptly an image of the current frame has varied from an image of the previous frame, and outputting the dimming signals for the current frame after modulating duty ratios of the dimming signals for the current frame, or without modulating the duty ratios.
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Inventors:
Lee Tai Asahi
Application Number:
JP2008319510A
Publication Date:
September 26, 2012
Filing Date:
December 16, 2008
Export Citation:
Assignee:
LG Display Company Limited
International Classes:
G09G3/36; G02F1/133; G09G3/20; G09G3/34; H04N5/66
Domestic Patent References:
| JP2007183608A | ||||
| JP2002031846A | ||||
| JP2005338857A | ||||
| JP6160811A | ||||
| JP3125333U |
Attorney, Agent or Firm:
Okabe
Masao Okabe
Nobuaki Kato
Shinichi Usui
Takao Ochi
Asahi Shinmitsu
Katsumi Miyama
Masao Okabe
Nobuaki Kato
Shinichi Usui
Takao Ochi
Asahi Shinmitsu
Katsumi Miyama