A reference voltage generating circuit generates a reference voltage which is independent of the polarity of the reference voltage, and is divided into the reference voltage of the high voltage side and the reference voltage of the low-voltage side by a selection circuit. The reference voltage is selected high voltage side voltage reference circuit in separated by the Pch structure DA transform circuit of the converter of the selection of a reference voltage, as shown by the tone voltage output reference voltage, low voltage side by the structure of Nch converter to choose a reference voltage, as the color display output voltage. Therefore, in the display device adopting voltage modulation mode, the circuit can be miniaturized, and the power consumption can be reduced. \ue5cf
【技术实现步骤摘要】
【技术保护点】
一种显示驱动装置,对有源矩阵方式的显示面板,按照规定的周期使极性反相,同时将根据显示数据进行调制的色调显示用电压加在该显示面板的数据信号线上,该显示驱动装置的特征在于备有: 发生色调数数量的基准电压的基准电压发生部; 将由上述基准电压发生部发生的色调数数量的基准电压分离成高压侧的基准电压和低压侧的基准电压的分离部; 接收由上述分离部分离的高压侧的基准电压的输入,根据显示数据控制开关的通/断,从输入的高压侧的基准电压中选择一个基准电压,作为色调显示用电压输出的第一DA变换部;以及 接收由上述分离部分离的低压侧的基准电压的输入,根据显示数据控制开关的通/断,从输入的低压侧的基准电压中选择一个基准电压,作为色调显示用电压输出的第二DA变换部。
【技术特征摘要】
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