COMMON VOLTAGE FEEDBACK COMPENSATION CIRCUIT, METHOD, AND FLAT DISPLAY DEVICE

  • US 20210118346A1
  • Filed: 09/29/2018
  • Published: 04/22/2021
  • Est. Priority Date: 06/29/2018
  • Status: Active Grant
First Claim
Patent Images

1. A common voltage feedback compensation circuit, comprising:

  • a switch selecting circuit, wherein a feedback common voltage is inputted to a first end of the switch selecting circuit, a first reference voltage is inputted to a second end of the switch selecting circuit, and a second reference voltage is inputted to a third end of the switch selecting circuit, the switch selecting circuit is configured to determine a range of the feedback common voltage received from a display panel according to the first reference voltage and the second reference voltage, and an output end of the switch selecting circuit is configured to output corresponding switch signals according to a determining result;

    a switch circuit, wherein the feedback common voltage is inputted to an input end of the switch circuit, an output end of the switch circuit connects to an input end of a compensation circuit, and the switch circuit is configured to be disconnected or closed according to the corresponding switch signals;

    an attenuation circuit, wherein the feedback common voltage is inputted to an input end of the attenuation circuit, and an output end of the attenuation circuit connects to an input end of the compensation circuit;

    when the switch circuit is disconnected, the feedback common voltage is inputted to and is attenuated by the attenuation circuit, and the attenuated feedback common voltage is outputted to the compensation circuit;

    when the switch circuit is closed, the feedback common voltage is directly inputted to the compensation circuit;

    the compensation circuit, wherein the input end of the compensation circuit connects to the output end of the switch circuit and the output end of the attenuation circuit, and an output end of the compensation circuit is configured to output common voltage compensation signals.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×