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    • 1. 发明申请
    • Multiple channel programmable gamma correction voltage generator
    • 多通道可编程伽玛校正电压发生器
    • US20050057482A1
    • 2005-03-17
    • US10766197
    • 2004-01-28
    • Douglas YoungbloodSteven Smith
    • Douglas YoungbloodSteven Smith
    • G09G3/36
    • G09G3/3688G09G2310/027G09G2320/0247G09G2320/0276G09G2320/0606G09G2320/0673
    • A multiple channel programmable gamma correction voltage generator including a resistor ladder, buffers, select logic, and a programmable non-volatile memory device. The memory provides select values indicative of one or more stored gamma correction values. The resistor ladder includes adjustable tap resistors distributed along the resistor ladder. The adjustable tap resistors provide multiple tap voltages distributed according to the gamma correction value. The buffers receive the tap voltages and provide gamma correction voltages. The select logic selects tap points of the adjustable tap resistors to select the tap voltages based on the select values stored in the memory. Additional resistors and switch logic may be included to enable re-positioning of the adjustable tap resistor within the resistor ladder. Latches and address control may be provided on the memory to enable programming and selection of multiple gamma correction values.
    • 多通道可编程伽玛校正电压发生器,包括电阻梯形图,缓冲器,选择逻辑和可编程非易失性存储器件。 存储器提供指示一个或多个存储的伽马校正值的选择值。 电阻梯包括沿电阻梯分布的可调节分接电阻器。 可调节抽头电阻提供根据伽马校正值分布的多个抽头电压。 缓冲器接收抽头电压并提供伽马校正电压。 选择逻辑选择可调节抽头电阻的抽头,根据存储在存储器中的选择值来选择抽头电压。 可以包括附加的电阻和开关逻辑,以使可调节抽头电阻器能够重新定位在电阻梯内。 可以在存储器上提供锁存和地址控制以使得能够编程和选择多个伽马校正值。