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CN-122024645-A - Pixel driving circuit, driving method, display panel and electronic equipment

CN122024645ACN 122024645 ACN122024645 ACN 122024645ACN-122024645-A

Abstract

The embodiment of the application provides a pixel driving circuit, a driving method, a display panel and electronic equipment, and relates to the technical field of display. The circuit comprises a light emitting module, a driving module, a first-stage storage module, a second-stage storage module, a bias compensation module, a data writing module and a light emitting control module, wherein the driving module comprises a control end, a first end and a second end, the first-stage storage module is connected with the first power supply and the control end of the driving module, the second-stage storage module is connected with the first end of the driving module and the data writing module, the bias compensation module is connected with the second power supply and the second end of the driving module and used for writing bias compensation voltage into the second end of the driving module in a compensation stage, and the data writing module is connected with the third power supply and the second-stage storage module and used for writing data voltage in a data writing stage. Through the structure, the data voltage can be written in quickly, and the display requirements of high refresh rate and high resolution are met.

Inventors

  • YANG YUNZHI

Assignees

  • 深圳市一曌科技有限公司

Dates

Publication Date
20260512
Application Date
20260327

Claims (11)

  1. 1. The pixel driving circuit is characterized by comprising a light emitting module, a driving module, a primary storage module, a secondary storage module, a bias compensation module, a data writing module and a light emitting control module; The driving module comprises a control end, a first end and a second end; The first end of the primary storage module is electrically connected with a first power supply, the second end of the primary storage module is electrically connected with the control end of the driving module, and the primary storage module is used for storing the compensation voltage of the driving module in a compensation stage and a data writing stage; the first end of the secondary storage module is electrically connected with the first end of the driving module, the second end of the secondary storage module is electrically connected with the second end of the data writing module, and the secondary storage module is used for storing data voltage in a data writing stage; The first end of the bias compensation module is electrically connected with a second power supply, the second end of the bias compensation module is electrically connected with the second end of the driving module, and the bias compensation module is used for writing bias compensation voltage provided by the second power supply into the second end of the driving module in a compensation stage; the first end of the data writing module is electrically connected with a third power supply, and the data writing module is used for writing the data voltage provided by the third power supply into the second end of the secondary storage module in the data writing stage.
  2. 2. The pixel driving circuit according to claim 1, wherein the bias compensation module comprises a first switching tube, a first end of the first switching tube is electrically connected with a first end of the driving module, a second end of the first switching tube is electrically connected with a control end of the driving module, the first switching tube is used for conducting in the compensation phase and the data writing phase, and a grid electrode of the first switching tube is connected with a first compensation control signal, and the first switching tube is used for conducting when the first compensation control signal is in an active level.
  3. 3. The pixel driving circuit according to claim 2, wherein the bias compensation module further comprises a second switching tube, a first end of the second switching tube is electrically connected with the second power supply, a second end of the second switching tube is electrically connected with the second end of the driving module, and a gate of the second switching tube is connected with a second compensation control signal for being conducted when the second compensation control signal is in an active level.
  4. 4. The pixel driving circuit according to claim 1, wherein the data writing module comprises a third switching tube, a first end of the third switching tube is electrically connected with a third power supply, a second end of the third switching tube is electrically connected with a second end of the second-stage storage module, and a gate of the third switching tube is connected with a first writing control signal for being conducted when the first writing control signal is in an active level.
  5. 5. The pixel driving circuit according to claim 1, wherein the light emission control module includes: The first end of the first light-emitting control unit is electrically connected with the first power supply, the second end of the first light-emitting control unit is electrically connected with the second end of the driving module, and the control end of the first light-emitting control unit is connected with a light-emitting control signal and is used for being conducted when the light-emitting control signal is in an effective level; The first end of the second light-emitting control unit is electrically connected with the first end of the driving module, the second end of the second light-emitting control unit is electrically connected with the first end of the light-emitting module, and the control end of the second light-emitting control unit is connected with the light-emitting control signal and is used for being conducted when the light-emitting control signal is in an effective level.
  6. 6. The pixel driving circuit according to claim 5, wherein the first light emitting control unit includes a fourth switching tube, a gate of the fourth switching tube is connected to the light emitting control signal, a first end of the fourth switching tube is electrically connected to the first power supply, and a second end of the fourth switching tube is electrically connected to the second end of the driving module; The second light-emitting control unit comprises a fifth switch tube, the grid electrode of the fifth switch tube is connected with the light-emitting control signal, the first end of the fifth switch tube is electrically connected with the first end of the driving module, and the second end of the fifth switch tube is electrically connected with the first end of the light-emitting module.
  7. 7. The pixel driving circuit according to claim 1, further comprising a first initializing unit, wherein the first initializing unit comprises a sixth switching tube, a first end of the sixth switching tube is electrically connected to a fourth power supply, a second end of the sixth switching tube is electrically connected to a control end of the driving module, and a gate of the sixth switching tube is connected to a first initializing control signal for conducting when the first initializing control signal is at an active level.
  8. 8. The pixel driving circuit according to claim 1, further comprising a second initializing unit, wherein the second initializing unit comprises a seventh switching tube, a first end of the seventh switching tube is electrically connected to a fifth power supply, a second end of the seventh switching tube is electrically connected to the first end of the light emitting module, and a gate of the seventh switching tube is connected to a second initializing control signal, and is used for being turned on when the second initializing control signal is in an active level.
  9. 9. A driving method, characterized in that it is applied to the pixel driving circuit according to any one of claims 1 to 8, comprising: in a first initialization stage, the first initialization unit resets the control end of the driving module to a first initialization voltage; In a compensation stage, the bias compensation module writes a bias compensation voltage into a second end of the driving module, and the driving module and the first switching tube transmit the bias compensation voltage to a control end of the driving module so as to store the compensation voltage in the primary storage module; In a data writing stage, the data writing module writes data voltage into the secondary storage module, the secondary storage module adjusts the potential of the first end of the driving module through capacitive coupling, and the first switching tube transmits the adjusted potential to the control end of the driving module; in a second initialization stage, the bias compensation module writes a bias compensation voltage into a second end of the driving module, and the second initialization unit resets the first end of the light emitting module to a second initialization voltage; in the light-emitting stage, the light-emitting control module controls the driving module to drive the light-emitting module to emit light.
  10. 10. A display panel, the display panel comprising: A substrate; And a plurality of pixel circuits arranged in an array on the substrate, the pixel circuits being the pixel driving circuit according to any one of claims 1 to 8.
  11. 11. An electronic device comprising the display panel of claim 10.

Description

Pixel driving circuit, driving method, display panel and electronic equipment Technical Field The present application relates to the field of display technologies, and in particular, to a pixel driving circuit, a driving method, a display panel, and an electronic device. Background Along with development of display technology, high resolution and high refresh rate have become important indicators of Active Matrix Organic Light Emitting Diode (AMOLED) display devices, and are widely applied to smart phones and tablet computers. These devices place higher demands on picture smoothness and color accuracy, requiring pixel driving operations to be completed in a very short single line scan period. The conventional pixel driving circuit of the AMOLED display panel generally adopts a 7T1C or 8T1C structure, and its core functions include threshold voltage compensation and data voltage writing. In the specific implementation, the threshold voltage compensation and the writing of the data voltage are performed in series in the same scanning period, namely, firstly, a transistor is conducted through a control signal, the threshold voltage is measured by utilizing the saturation characteristic of a driving transistor and is stored by a capacitor, after the compensation is finished, the data voltage is written into a pixel circuit, and the driving transistor controls the light current according to the compensated threshold voltage and the data voltage. However, the above-described manner has a problem in that the single-line scanning period is long, and it is difficult to satisfy the high-resolution high-refresh rate display requirement. Disclosure of Invention The application provides a pixel driving circuit, a driving method, a display panel and electronic equipment, which are used for solving the technical problems that in the prior art, a single-row scanning period is long and high-resolution high-refresh rate display requirements are difficult to meet due to threshold voltage compensation and data voltage writing. In a first aspect, an embodiment of the present application provides a pixel driving circuit, where the pixel driving circuit includes a light emitting module, a driving module, a primary storage module, a secondary storage module, a bias compensation module, a data writing module, and a light emitting control module; The driving module comprises a control end, a first end and a second end; The first end of the primary storage module is electrically connected with the first power supply, the second end of the primary storage module is electrically connected with the control end of the driving module, and the primary storage module is used for storing the compensation voltage of the driving module in the compensation stage and the data writing stage; the first end of the second-level storage module is electrically connected with the first end of the driving module, the second end of the second-level storage module is electrically connected with the second end of the data writing module, and the second-level storage module is used for storing data voltage in a data writing stage; The first end of the bias compensation module is electrically connected with the second power supply, the second end of the bias compensation module is electrically connected with the second end of the driving module, and the bias compensation module is used for writing bias compensation voltage provided by the second power supply into the second end of the driving module in a compensation stage; The first end of the data writing module is electrically connected with the third power supply, and the data writing module is used for writing the data voltage provided by the third power supply into the second end of the secondary storage module in the data writing stage. According to the application, the first-stage capacitor storage unit and the second-stage capacitor storage unit are arranged, the offset voltage writing unit and the data voltage writing unit are used for writing the offset voltage and the data voltage respectively, and the light-emitting control unit and the initializing unit are used for being matched cooperatively, so that the threshold voltage drift of the driving tube unit can be effectively compensated, the uneven display brightness problem caused by process variation and aging is eliminated, the display uniformity is improved, meanwhile, the second-stage capacitor storage unit is used for realizing the rapid writing of the data voltage, the low gray scale display distortion caused by insufficient writing time is avoided, the dark state detail expression is improved, and the operations such as compensation, writing, initialization, light-emitting control and the like can be orderly completed in a single-row scanning period, the single-row scanning time is effectively shortened, the display requirements of high resolution and high refresh rate are met, and the picture smoothness and the display quality are improv