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公开(公告)号:EP1904997A2
公开(公告)日:2008-04-02
申请号:EP06765756.9
申请日:2006-06-15
发明人: FISH, David A., c/o Philips I.P. & Standards , YOUNG, Nigel D., c/o Philips I.P. & Standards , CHILDS, Mark J., c/o Philips I.P. & Standards
IPC分类号: G09G3/32
CPC分类号: G09G3/2014 , G09G3/2011 , G09G3/3233 , G09G2300/0819 , G09G2300/0842 , G09G2300/0852 , G09G2300/0861 , G09G2300/088 , G09G2320/0209 , G09G2320/043 , G09G2320/045 , G09G2320/0626 , G09G2360/144 , G09G2360/148
摘要: An active matrix LED display device uses optical feedback for controlling the pixel drive transistors (2). The LED display elements are controlled to provide a pulsed output, and the optical feedback element (66,68) is controlled cyclically such that, for constant illumination of the optical feedback element (66,68) during a cycle, there is a substantially zero net output charge flow. This arrangement uses pulsed light output, and arranges the optical feedback to operate only in response to a corresponding pulsed light input. In this way, ambient light, which will be uniform over the time period of the cycle of operation, will not influence the optical feedback system. In this way, the system is not influenced by ambient light conditions.
摘要翻译: 有源矩阵LED显示装置使用光反馈来控制像素驱动晶体管(2)。 控制LED显示元件以提供脉冲输出,并且循环地控制光学反馈元件(66,68),使得为了在循环期间恒定地照亮光学反馈元件(66,68),存在基本为零 净输出电荷流量。 该布置使用脉冲光输出,并且布置光学反馈以仅响应于相应的脉冲光输入来操作。 以这种方式,在操作周期的时间段内将保持均匀的环境光将不会影响光学反馈系统。 这样,系统不受环境光线条件的影响。