DISPLAY BRIGHTNESS CONTROL CIRCUIT
    2.
    发明申请
    DISPLAY BRIGHTNESS CONTROL CIRCUIT 有权
    显示亮度控制电路

    公开(公告)号:US20080129763A1

    公开(公告)日:2008-06-05

    申请号:US11923970

    申请日:2007-10-25

    IPC分类号: G09G5/10

    摘要: A display brightness control circuit of a liquid crystal display device includes a logarithmic-linear converting circuit for converting an illuminance signal having a logarithmic relationship with incident light into a linear signal. When an output of an external light sensor is a logarithmic signal, the logarithmic signal is converted into a linear signal through the logarithmic-linear converting circuit, and when an output of the external light sensor is a linear signal, the logarithmic-linear converting circuit is not involved. The logarithmic-linear converting circuit corresponds to an exponential circuit which is an inverse function of a logarithm log. Further, when even the same logarithmic output illuminance sensor is different in input-output characteristics, setting of the abovementioned exponential circuit can be changed.

    摘要翻译: 液晶显示装置的显示亮度控制电路包括对数线性转换电路,用于将具有入射光的对数关系的照度信号转换为线性信号。 当外部光传感器的输出是对数信号时,通过对数线性转换电路将对数信号转换成线性信号,并且当外部光传感器的输出是线性信号时,对数线性转换电路 不参与 对数线性转换电路对应于作为对数日志的反函数的指数电路。 此外,即使相同的对数输出照度传感器在输入输出特性上不同,也可以改变上述指数电路的设定。