Pixel circuit, organic electroluminescent display panel and display apparatus

  • US 9,741,288 B2
  • Filed: 11/28/2014
  • Issued: 08/22/2017
  • Est. Priority Date: 08/15/2014
  • Status: Active Grant
First Claim
Patent Images

1. A pixel circuit, comprising:

  • a light-emitting device, a drive control module, a reset control module, a charge control module and a light-emitting control module, wherein,the reset control module has a control terminal connected with a reset signal terminal, an input terminal connected with a first level signal terminal, and an output terminal connected with an output terminal of the drive control module and an input terminal of the light-emitting device respectively;

    the reset control module is used for resetting the light-emitting device in an internal compensation mode, and exporting a current signal of the drive control module for driving the light-emitting device and comparing the same with a preset standard current value to determine a compensation factor in an external compensation mode;

    the charge control module has a control terminal connected with a scan signal terminal, an input terminal connected with a data signal terminal, and an output terminal connected with a first input terminal of the drive control module;

    the charge control module is used for charging the drive control module and writing a data signal into the drive control module in the internal compensation mode, and writing the data signal into the drive control module in the external compensation mode;

    the light-emitting control module has a control terminal connected with a light-emitting signal terminal, an input terminal connected with a second level signal terminal, and an output terminal connected with a second input terminal of the drive control module;

    the light-emitting control module is used for charging the drive control module and controlling the drive control module to drive the light-emitting device to emit light in the internal compensation mode, and controlling the drive control module to drive the light-emitting device to emit light in the external compensation mode;

    an output terminal of the light-emitting device is grounded, wherein, in the Internal compensation mode, at a reset stage, the reset control module is in an ON state under control of the reset signal terminal, the first level signal terminal is connected with the light-emitting device, the first level signal terminal resets the light-emitting device;

    at a charging stage, the charge control module is in an ON state under control of the scan signal terminal, the data signal terminal is connected with the drive control module, the light-emitting control module is in an ON state under control of the light-emitting signal terminal, the second level signal terminal is connected with the drive control module, the data signal terminal and the second level signal terminal charge the drive control module;

    at a compensation stage, the data signal terminal writes a data signal into the drive control module under control of the scan signal terminal;

    at a light-emitting stage, under control of the light-emitting signal terminal, the second level signal terminal controls the drive control module to drive the light-emitting device to emit light.

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