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    • 2. 发明授权
    • Liquid crystal display device
    • 液晶显示装置
    • US07312782B2
    • 2007-12-25
    • US10901668
    • 2004-07-29
    • Katsuyoshi HirakiTetsuya KobayashiYasutake Furukoshi
    • Katsuyoshi HirakiTetsuya KobayashiYasutake Furukoshi
    • G09G3/36H05B37/00
    • G09G3/342G09G3/2092G09G5/008G09G2320/0247G09G2360/16
    • A backlight driving circuit is controlled by a timing controller and executes on/off control of the backlights. The timing controller detects, using a synchronous signal, a change in a blank period which is of one frame period for display of one screen, during which the image signal is not transmitted. Upon detecting the change in the blank period, the timing controller adjusts the on-periods of the backlights in order to make the brightness of the backlights equal to one another. Consequently, the backlights have an equal brightness with one another in spite of the change in the blank period. This makes the lives of the backlights equal to one another. In a case where the plural backlights constitute a backlight unit, a reduction in life of the backlight unit is prevented. Further, it is also possible to prevent the brightness of the backlights from being differentiated even through a long-term use.
    • 背光驱动电路由定时控制器控制,并执行背光的开/关控制。 定时控制器使用同步信号检测在一个屏幕的显示期间的一个帧周期的变化,在该周期期间图像信号不被发送。 当检测到空白期间的变化时,定时控制器调节背光的接通周期,以使背光的亮度彼此相等。 因此,尽管空白期间的变化,背光灯彼此具有相等的亮度。 这使得背光灯的生命相互等同。 在多个背光构成背光单元的情况下,防止背光单元的寿命缩短。 此外,即使长期使用也可以防止背光的亮度差异化。