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CN-121999718-A - Pixel circuit, display panel and display device

CN121999718ACN 121999718 ACN121999718 ACN 121999718ACN-121999718-A

Abstract

The disclosure provides a pixel circuit, a display panel and a display device, which relate to the technical field of display, wherein the pixel circuit comprises a driving transistor, a first transistor, a second transistor, a third transistor, a first capacitor and a second capacitor, the grid, the first pole and the second pole of the driving transistor are respectively connected with a first node, a second node and a third node, the first transistor is connected between a first power supply signal end and the second node, the second transistor is connected between a data signal end and the first node, and the third transistor is connected between the third node and a reset signal end. The first capacitor is connected between the first power supply signal end and the second node, and the second capacitor is connected between the first node and the second node. Among the four transistors included in the pixel circuit, the body terminal of at least one transistor is connected with a third power signal terminal, and the third power signal terminal is different from the first power signal terminal, so that the display effect of the display product is improved.

Inventors

  • HE XIAOXIANG
  • WANG HUORONG

Assignees

  • 西安钛铂锶电子科技有限公司

Dates

Publication Date
20260508
Application Date
20241104

Claims (12)

  1. 1. A pixel circuit comprising a driving transistor, a first transistor, a second transistor, a third transistor, a first capacitor, a second capacitor, and a light emitting element; the grid electrode of the driving transistor is connected with a first node, the first electrode of the driving transistor is connected with a second node, and the second electrode of the driving transistor is connected with a third node; the first electrode of the first transistor is connected with a first power supply signal end, the second electrode of the first transistor is connected with the second node, the grid electrode of the first transistor is connected with a first control signal end, the first electrode of the second transistor is connected with a data signal end, the second electrode of the second transistor is connected with the first node, the grid electrode of the third transistor is connected with a second control signal end, the first electrode of the third transistor is connected with a reset signal end, the second electrode of the third transistor is connected with the third node, the grid electrode of the third transistor is connected with a third control signal end, the first electrode of the first capacitor is connected with the first power supply signal end, the second electrode of the second capacitor is connected with the second node, the second electrode of the second capacitor is connected with the first node, the first electrode of the light-emitting element is connected with the third node, the second electrode of the second light-emitting element is connected with the second power supply signal end; And the body end of at least one transistor among the driving transistor, the first transistor, the second transistor and the third transistor is connected with a third power signal end, and the first power signal end, the second power signal end and the third power signal end are respectively connected with different power signal lines.
  2. 2. The pixel circuit according to claim 1, wherein body terminals of the first transistor, the second transistor, and the driving transistor are each electrically connected to the third power supply signal terminal.
  3. 3. The pixel circuit according to claim 1, wherein body terminals of the driving transistor, the first transistor, the second transistor, and the third transistor are electrically connected to the third power supply signal terminal.
  4. 4. The pixel circuit of claim 1, wherein the drive transistor, the first transistor, the second transistor, and the third transistor are PMOS transistors.
  5. 5. The pixel circuit of claim 1, wherein the first power supply signal terminal is configured to transmit a first constant voltage signal having a voltage value V1 to the pixel circuit, and the third power supply signal terminal is configured to transmit a second constant voltage signal having a voltage value V2 to a body terminal of the corresponding transistor, wherein v1=v2.
  6. 6. The pixel circuit according to claim 5, further comprising a signal input terminal for transmitting a power supply signal, wherein the first power supply signal line and the third power supply signal line are connected to the same signal input terminal.
  7. 7. The pixel circuit according to claim 1, comprising a first power signal line, a second power signal line, and a third power signal line, wherein the first power signal terminal is connected to the first power signal line, the second power signal terminal is connected to the second power signal line, and the third power signal terminal is connected to the third power signal line, wherein an area ratio of the first power signal line is greater than or equal to an area ratio of the third power signal line.
  8. 8. The pixel circuit according to claim 7, wherein the first power supply signal line and the third power supply signal line are provided in the same metal layer.
  9. 9. The pixel circuit according to claim 8, wherein a line width of the first power supply signal line is larger than a line width of the third power supply signal line.
  10. 10. The pixel circuit according to claim 7, wherein the first power signal line is located in a first metal layer, the third power signal line is located in a second metal layer, the first metal layer and the second metal layer are isolated by an insulating layer, and the first power signal line has a mesh-like wiring structure in the first metal layer.
  11. 11. A display panel comprising the pixel circuit according to any one of claims 1 to 10.
  12. 12. A display device comprising the display panel of claim 11.

Description

Pixel circuit, display panel and display device Technical Field The disclosure relates to the field of display technologies, and in particular, to a pixel circuit, a display panel and a display device. Background With the continuous development of science and technology, more and more display products, such as mobile phones, tablet computers, notebook computers, intelligent wearing equipment and the like, are widely applied to daily life and work of people, bring great convenience to daily life and work of people, and become an indispensable important tool for people at present. In the existing display products, the light emission of the light emitting element is controlled by the pixel circuit, and how to improve the accuracy of the driving signal provided by the pixel circuit to the light emitting element and the display effect becomes one of the technical problems to be solved in the present stage. Disclosure of Invention In order to solve the above technical problems, the present disclosure provides a pixel circuit, a display panel and a display device, which aim to improve the accuracy of a driving signal provided by the pixel circuit to a light emitting element and the display effect of a display product. In a first aspect, the disclosure provides a pixel circuit, which includes a driving transistor, a first transistor, a second transistor, a third transistor, a first capacitor, a second capacitor and a light emitting element, where a gate of the driving transistor is connected to a first node, a first pole is connected to a second node, and a second pole is connected to a third node, a first pole of the first transistor is connected to a first power signal terminal, a second pole is connected to the second node, and a gate is connected to a first control signal terminal, a first pole of the second transistor is connected to a data signal terminal, a second pole is connected to the first node, and a gate is connected to a second control signal terminal, a first pole of the third transistor is connected to a reset signal terminal, a second pole is connected to the third node, and a gate is connected to a third control signal terminal, a first pole of the first capacitor is connected to the first power signal terminal, a second pole of the second capacitor is connected to the second node, a second pole of the second capacitor is connected to the first power signal terminal, a second pole of the second transistor is connected to the first node, a third pole of the light emitting element is connected to the first power signal terminal, and a third power signal terminal of the third transistor. In a second aspect, the present disclosure provides a display panel including the pixel circuit provided in the first aspect of the present disclosure, based on the same inventive concept. In a third aspect, the present disclosure provides a display device including the display panel provided in the second aspect of the present disclosure, based on the same inventive concept. Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages: In the pixel circuit, the display panel and the display device provided by the disclosure, the body terminal of at least one of the driving transistor, the first transistor, the second transistor and the third transistor is connected to the third power supply signal terminal instead of the first power supply signal terminal connected to the first capacitor, at this time, the capacitance between the first node and the second node and the first power supply signal terminal becomes the compensation effect of only increasing the capacitance between the first node and the third power supply signal terminal, the capacitance between the second node and the third power supply signal terminal, and the capacitance between the first node and the second node, the capacitance between the second node and the first power supply signal terminal, and the capacitance between the first node and the first power supply signal terminal, so that the original proportional relationship and capacitance value of the first capacitance and the second capacitance are not influenced, that is, the relationship of the first capacitance and the second capacitance is fixed, the compensation effect of the first capacitance and the second capacitance on the threshold voltage of the driving transistor in the pixel circuit is not influenced, the uniformity of the driving current output to the light emitting element is favorably improved, the luminance uniformity of the light emitting element is favorably improved, and the luminance display effect is favorably improved. Drawings The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. In order to more clearly illustrate the embodimen