Pixel circuit, organic electroluminescent display panel and display device

摘要

A pixel circuit, an organic electroluminescent display panel and a display device are provided. The pixel circuit includes a drive sub-module (1), a data write sub-module (2), a touch detection sub-module (3) having a photosensitive device and a light-emitting control sub-module (4) having a luminous device. Under the control of the reset signal terminal (Reset), the scan signal terminal (Scan) and the data signal terminal (Data), a data signal is transmitted to the first terminal (1a) of the drive sub-module (1) by the data write sub-module (2). Under the control of the touch control signal terminal (Select), the touch detection sub-module (3) controls output of a touch detection signal from the drive sub-module (1) to the touch signal read terminal, the touch detection signal being decreased as the light intensity irradiated onto the photosensitive device is increased, so as to realize a touch function. Under the control of the light-emitting control signal terminal (EM), the light-emitting control sub-module (4) controls the drive sub-module to drive the luminous device (1) to give off light, so as to realize a display function. Touch and display functions are integrated in the pixel circuit, so that the production cost involved in arranging a display driving circuit and a touch circuit separately can be saved.

主权项

1. A pixel circuit, comprising: a drive sub-module, a data write sub-module, a touch detection sub-module having a photosensitive device, and a light-emitting control sub-module having a luminous device, wherein,
a first terminal of the drive sub-module is connected to a first terminal of the data write sub-module and a first terminal of the touch detection sub-module, respectively, a second terminal of the drive sub-module is connected to a second terminal of the data write sub-module, a second terminal of the touch detection sub-module and a first reference signal terminal, respectively, a third terminal of the drive sub-module is connected to a third terminal of the data write sub-module, a third terminal of the touch detection sub-module and a first terminal of the light-emitting control sub-module, respectively; a fourth terminal of the data write sub-module is connected to a reset signal terminal, a fifth terminal of the data write sub-module is connected to a scan signal terminal, a sixth terminal of the data write sub-module is connected to a data signal terminal; under the control of the reset signal terminal, the scan signal terminal and the data signal terminal, a data signal is transmitted to the first terminal of the drive sub-module by the data write sub-module; a fourth terminal of the touch detection sub-module is connected to a touch control signal terminal, a fifth terminal of the touch detection sub-module is connected to a touch signal read terminal; under the control of the touch control signal terminal, the touch detection sub-module controls output of a touch detection signal from the drive sub-module to the touch signal read terminal, the touch detection signal being decreased as the light intensity irradiated onto the photosensitive device is increased; a second terminal of the light-emitting control sub-module is connected to a second reference signal terminal, a third terminal of the light-emitting control sub-module is connected to a light-emitting control signal terminal; under the control of the light-emitting control signal terminal, the light-emitting control sub-module controls the drive sub-module to drive the luminous device to give off light, wherein, the data write sub-module comprises a first switch transistor, a second switch transistor, a first capacitor and a second capacitor, wherein, a gate electrode of the first switch transistor is connected to the reset signal terminal, a source electrode of the first switch transistor is connected to the third terminal of the drive sub-module, and a drain electrode of the first switch transistor is connected to the first terminal of the drive sub-module, a first end of the first capacitor and a first end of the second capacitor, respectively; a gate electrode of the second switch transistor is connected to the scan signal terminal, a source electrode of the second switch transistor is connected to the data signal terminal, and a drain electrode of the second switch transistor is connected to a second end of the first capacitor; a second end of the second capacitor is connected to the first reference signal terminal, the second terminal of the drive sub-module and the second terminal of the touch detection sub-module, respectively.