Pixel compensation circuit and AMOLED display device

Pixel compensation circuit and AMOLED display device

  • CN 105,427,809 B
  • Filed: 01/04/2016
  • Issued: 11/03/2020
  • Est. Priority Date: 01/04/2016
  • Status: Active Grant
First Claim
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1. A pixel compensation circuit is characterized by comprising a data signal writing module, a high-voltage signal writing module, a first reference voltage writing module, a second reference voltage writing module, a voltage maintaining module, a driving transistor, a capacitor and a light-emitting device;

  • the data signal writing module is connected with the first end of the capacitor in the stage before the light-emitting device emits light;

    the first reference voltage writing module is connected with the control electrode of the driving transistor in the stage before the light emitting device emits light, and the second reference voltage writing module is connected with the drain electrode of the driving transistor in the stage before the light emitting device emits light, is connected with the anode of the light emitting device and is used for writing a second reference voltage into the anode of the light emitting device;

    the high-voltage signal writing module is connected with the second end of the capacitor in the light emitting process of the light emitting device;

    the voltage maintaining module is connected with the first end of the capacitor and the control electrode of the driving transistor in the light emitting process of the light emitting device;

    the source electrode of the driving transistor is connected with the second end of the capacitor, and the drain electrode of the driving transistor is connected with the anode of the light-emitting device;

    the cathode of the light-emitting device is connected with a common grounding electrode;

    the pre-lighting phase includes a first phase and a second phase following the first phase,the pixel compensation circuit further comprises a connection control module, wherein the connection control module is connected between the drain electrode of the driving transistor and the anode of the light-emitting device, and is used for controlling the connection between the driving transistor and the light-emitting device in the first stage and controlling the connection between the driving transistor and the light-emitting device in the second stage and the light-emitting stage;

    the second reference voltage writing module comprises a second reference voltage end and a third transistor, wherein a control electrode of the third transistor is connected with the grid line, a source electrode of the third transistor is connected with the second reference voltage end, and a drain electrode of the third transistor is connected with a drain electrode of the driving transistor and the connection control module;

    the second reference voltage end can set or adjust and output different second reference voltages;

    the connection control module comprises a sixth transistor, a control electrode of the sixth transistor is connected with the second light-emitting signal end, a source electrode of the sixth transistor is connected with a drain electrode of the driving transistor and the second reference voltage writing module, and the drain electrode of the sixth transistor is connected with an anode of the light-emitting device.

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