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CN-122024643-A - Pixel driving circuit of display panel and display panel

CN122024643ACN 122024643 ACN122024643 ACN 122024643ACN-122024643-A

Abstract

The application discloses a pixel driving circuit of a display panel and the display panel, wherein the pixel driving circuit is provided with a first pixel driving circuit in an open pore display area and comprises a data writing module, a storage module, a reset module, a first driving transistor, a light-emitting control module, a light-emitting unit and a compensation module, wherein the control end of the first driving transistor is connected to a first node, the input end of the first driving transistor is connected to a second node, the output end of the first driving transistor is connected to a third node, one end of the light-emitting unit is connected to a fourth node, the compensation module is connected with the first node and/or the fourth node and is used for providing compensation signals for the first node and/or the fourth node, and the compensation signals are used for compensating insufficient data writing caused by uneven impedance of a scanning line or a data line. The application utilizes the compensation design of the pixel driving circuit of the open pore display area of the display panel, thereby improving the phenomena of display split screen, uneven brightness and the like of the open pore display area and the non-open pore display area.

Inventors

  • LI HONG
  • ZHOU XIUFENG
  • YE LIDAN

Assignees

  • 惠科股份有限公司

Dates

Publication Date
20260512
Application Date
20260319

Claims (10)

  1. 1. The pixel driving circuit of the display panel comprises an open pore display area and a non-open pore display area, and is characterized in that the pixel driving circuit is provided with a first pixel driving circuit in the open pore display area, and the first pixel driving circuit comprises a data writing module, a storage module, a reset module, a first driving transistor, a light-emitting control module, a light-emitting unit and a compensation module; the control end of the first driving transistor is connected to a first node, the input end of the first driving transistor is connected to a second node, and the output end of the first driving transistor is connected to a third node; One end of the light-emitting unit is connected with a fourth node, and the other end of the light-emitting unit is connected with a grounding signal end; the reset module is used for resetting the potentials of the first node, the second node and the fourth node; the storage module is respectively connected with the first node and the fourth node; The light-emitting control module is respectively connected with the second node, the third node and the fourth node and is used for inputting a power signal from the second node and electrically connecting the third node and the fourth node under the control of a light-emitting control signal; The data writing module is connected to the third node and is used for acquiring data signals from the data line under the control of the scanning line; the compensation module is connected with the first node and/or the fourth node and is used for providing compensation signals for the first node and/or the fourth node, and the compensation signals are used for compensating data writing deficiency caused by uneven impedance of the scanning line or the data line.
  2. 2. The pixel driving circuit of a display panel according to claim 1, wherein the display panel includes a plurality of first scan lines and a plurality of second scan lines, and the open display area includes a first open display area; The first scanning line is arranged in the first open pore display area, and the second scanning line is arranged in the non-open pore display area; An open hole area is arranged in the first open hole display area, and the first open hole display area is positioned at two sides of the open hole area in the length direction of the first scanning line; the first scanning line is arranged in the open hole area in a winding mode, and the line resistance of the first scanning line is larger than that of the second scanning line.
  3. 3. The pixel driving circuit of a display panel according to claim 1 or 2, wherein the display panel includes a plurality of first data lines and a plurality of second data lines, and the open display area includes a second open display area; the first data line is arranged in the second open pore display area, and the second data line is arranged in the non-open pore display area; An open pore area is arranged in the second open pore display area, and the second open pore display area is positioned at two sides of the open pore area in the length direction of the first data line; the first data line is wound in the open area, and the line resistance of the first data line is larger than that of the second data line.
  4. 4. The pixel driving circuit of claim 1, wherein the compensation module comprises a first compensation circuit comprising a first compensation signal, a first active switch, and a first compensation control signal; The output end of the first active switch is connected with the first node, the first compensation signal is connected with the input end of the first active switch, and the first compensation control signal is connected with the control end of the first active switch.
  5. 5. The pixel driving circuit of claim 1, wherein the compensation module comprises a second compensation circuit comprising a second compensation signal, a second active switch, and a second compensation control signal; the output end of the second active switch is connected with the fourth node, the second compensation signal is connected with the input end of the second active switch, and the second compensation control signal is connected with the control end of the second active switch.
  6. 6. The pixel driving circuit of claim 1, wherein the compensation module comprises a first compensation circuit and a second compensation circuit, the first compensation circuit comprises a first compensation signal, a first active switch and a first compensation control signal, the output end of the first active switch is connected with the first node, the first compensation signal is connected with the input end of the first active switch, and the first compensation control signal is connected with the control end of the first active switch; The second compensation circuit comprises a second compensation signal, a second active switch and a second compensation control signal, wherein the output end of the second active switch is connected with the fourth node, the second compensation signal is connected with the input end of the second active switch, and the second compensation control signal is connected with the control end of the second active switch.
  7. 7. The pixel driving circuit of a display panel according to claim 4, 5 or 6, wherein the data writing module comprises a third active switch, a control terminal of the third active switch is connected to the first scan signal, and an input terminal of the third active switch is connected to the data signal; The light-emitting control module comprises a fourth active switch and a fifth active switch, the input end of the fourth active switch is connected with the power signal, the control end of the fourth active switch is connected with the light-emitting control signal, and the output end of the fourth active switch is connected with the second node; the input end of the fifth active switch is connected with the third node, the output end of the fifth active switch is connected with the fourth node, and the control end of the fifth active switch is connected with the light-emitting control signal; the reset module comprises a sixth active switch and a seventh active switch, wherein the input end of the sixth active switch is connected with the second node, the output end of the sixth active switch is connected with the first node, and the control end of the sixth active switch is connected with a reset control signal; The input end of the seventh active switch is connected with a reset signal, the control end of the seventh active switch is connected with the reset control signal, and the output end of the seventh active switch is connected with the fourth node; the storage module comprises a first capacitor, one end of the first capacitor is connected with the first node, and the other end of the first capacitor is connected with the second node.
  8. 8. The pixel driving circuit of claim 7, wherein the first pixel driving circuit comprises a reset phase, a data writing phase, a compensation phase, and a light emitting phase; in the reset stage, the sixth active switch and the seventh active switch are in a conducting state; In the data writing stage, the sixth active switch, the seventh active switch and the third active switch are in a conducting state; in the compensation phase, the first active switch or the second active switch is conducted; in the lighting stage, the fourth active switch and the fifth active switch are in a conducting state.
  9. 9. The pixel driving circuit of claim 4, wherein the larger the gray scale voltage of the data signal, the larger the voltage of the compensation signal.
  10. 10. A display panel comprising a pixel driving circuit of a display panel according to any one of claims 1-9, wherein the pixel driving circuit is for driving the display panel to display.

Description

Pixel driving circuit of display panel and display panel Technical Field The present application relates to the field of display technologies, and in particular, to a pixel driving circuit of a display panel and a display panel. Background An OLED (Organic Light-Emitting Diode) Organic Light-Emitting device has advantages of self-luminescence, low power consumption, no liquid crystal flow layer, and the like, gradually replaces a liquid crystal display panel, and particularly, completely drives the liquid crystal display panel in mobile terminal display devices such as mobile phones. With the rapid development of mobile terminal display devices, the requirements of users on the screen ratio of the display panel are higher and higher, and in the case of mobile phones, functional elements of cameras, sensors or receivers need to be arranged on the display panel, and the screen ratio of the display panel is affected by the parts of elements. In order to realize the full-screen display, an opening area is generally formed by digging holes in a display area of a display panel, and functional elements such as a camera, a sensor or a receiver are arranged below the opening area, so that the full-screen display is realized. For the pixel driving circuit in the OLED display panel, due to the provision of the open area, the scan line or the data line connected to the pixel driving circuit needs to be wound in the open area, so that the pixels connected to the scan line or the data line have capacitance and resistance differences from the pixels in the normal area, and brightness differences, such as uneven display and split screen, occur in the display area corresponding to the scan line or the data line. Disclosure of Invention The application aims to provide a pixel driving circuit of a display panel and the display panel, which utilize the compensation design of the pixel driving circuit of an open pore display area of the display panel, thereby improving the phenomena of display split screen, uneven brightness and the like of the open pore display area and a non-open pore display area. The application discloses a pixel driving circuit of a display panel, which comprises an open pore display area and a non-open pore display area, wherein the open pore display area is provided with a first pixel driving circuit, and the first pixel driving circuit comprises a data writing module, a storage module, a reset module, a first driving transistor, a light-emitting control module, a light-emitting unit and a compensation module; the control end of the first driving transistor is connected to a first node, the input end of the first driving transistor is connected to a second node, the output end of the first driving transistor is connected to a third node, one end of the light emitting unit is connected to a fourth node, the other end of the light emitting unit is connected to a grounding signal end, the reset module is used for resetting potentials of the first node, the second node and the fourth node, the storage module is respectively connected to the first node and the fourth node, the light emitting control module is respectively connected to the second node, the third node and the fourth node, the light emitting control module is used for inputting a power supply signal from the second node and electrically connecting the third node and the fourth node under the control of a light emitting control signal, the data writing module is connected to the third node and used for acquiring a data signal from a data line under the control of a scanning line, the compensation module is connected to the first node and/or the fourth node and used for providing a compensation signal for the first node and/or the fourth node and the compensation module is used for compensating the data writing signal or the data writing line not enough to cause the impedance difference. Optionally, the display panel comprises a plurality of first scanning lines and a plurality of second scanning lines, the open-pore display area comprises a first open-pore display area, the first scanning lines are arranged in the first open-pore display area, the second scanning lines are arranged in the non-open-pore display area, open-pore areas are arranged in the first open-pore display area, the first open-pore display area is located at two sides of the open-pore area in the length direction of the first scanning lines, the first scanning lines are arranged in the open-pore area in a winding mode, and the line resistance of the first scanning lines is larger than that of the second scanning lines. Optionally, the display panel comprises a plurality of first data lines and a plurality of second data lines, the open-pore display area comprises a second open-pore display area, the first data lines are arranged in the second open-pore display area, the second data lines are arranged in the non-open-pore display area, open-pore areas are arranged in the second