WO-2026090969-A1 - DISPLAY SUBSTRATE AND DISPLAY DEVICE

WO2026090969A1WO 2026090969 A1WO2026090969 A1WO 2026090969A1WO-2026090969-A1

Abstract

A display substrate and a display device. The display substrate comprises: a plurality of pixel driving circuits and a plurality of first signal lines arranged on a substrate. At least one pixel driving circuit comprises: a plurality of transistors. A control electrode of at least one transistor in at least one pixel driving circuit is electrically connected to at least one signal line among the plurality of first signal lines. The pixel driving circuit further comprises: a capacitor. The capacitor comprises: a first electrode plate (C1). The plurality of transistors include: a driving transistor and a compensation transistor. A first electrode of the compensation transistor and the first electrode plate of the capacitor are separately electrically connected to the control electrode of the driving transistor. There is no overlapping area between the orthographic projection of at least one structure among the first electrode of the compensation transistor, the first electrode plate (C1) of the capacitor, and the control electrode of the driving transistor in at least one pixel driving circuit on the substrate and the orthographic projection of at least one signal line among the plurality of first signal lines on the substrate.

Inventors

WEI, Yulong
XU, GUANGHUA
ZHANG, Daiying
XU, Yuanjie
XIE, Taofeng

Assignees

京东方科技集团股份有限公司
成都京东方光电科技有限公司

Dates

Publication Date: 20260507
Application Date: 20241031

Claims (17)

A display substrate includes: a substrate and a plurality of pixel driving circuits and a plurality of first signal lines disposed on the substrate. At least one pixel driving circuit includes: a plurality of transistors. At least one transistor includes: a control electrode, a first electrode and a second electrode. The control electrode of at least one transistor in at least one pixel driving circuit is electrically connected to at least one of the plurality of first signal lines. The pixel driving circuit further includes a capacitor, the capacitor including a first electrode plate, and the plurality of transistors including a driving transistor and a compensation transistor, wherein the first electrode of the compensation transistor and the first electrode plate of the capacitor are respectively electrically connected to the control electrode of the driving transistor. The orthographic projection of at least one of the structures of the first electrode of the compensation transistor, the first plate of the capacitor, and the control electrode of the driving transistor in at least one pixel driving circuit onto the substrate does not overlap with the orthographic projection of at least one of the plurality of first signal lines onto the substrate.
According to claim 1, the display substrate further includes: a first initial transistor, the first signal line includes: a first scan signal line, the control electrode of the first initial transistor in at least one pixel driving circuit is electrically connected to at least one of the plurality of first scan signal lines, and the first scan signal line extends at least partially along a first direction; For at least one pixel driving circuit, the orthographic projection of at least one of the structures of the first electrode of the compensation transistor, the first plate of the capacitor, and the control electrode of the driving transistor on the substrate does not overlap with the orthographic projection of the first scan signal line connected to the pixel driving circuit on the substrate.
According to claim 2, the display substrate, wherein the compensation transistor is an N-type transistor, the first signal line includes: a second scan signal line, the control electrode of the compensation transistor in at least one pixel driving circuit is electrically connected to at least one of the plurality of second scan signal lines, and the second scan signal line extends at least partially along a first direction; For at least one pixel driving circuit, the orthographic projection of at least one of the structures of the first electrode of the compensation transistor, the first plate of the capacitor, and the control electrode of the driving transistor on the substrate does not overlap with the orthographic projection of the second scan signal line connected to the pixel driving circuit on the substrate.
According to claim 3, the display substrate, wherein the second scan signal line comprises: a first scan line and a second scan line connected to each other; at least one of the first scan line and the second scan line extends at least partially along a first direction; For at least one second scan signal line, the orthographic projection of the first scan line on the substrate at least partially overlaps with the orthographic projection of the second scan line on the substrate, and the orthographic projection of at least one of the first scan line and the second scan line on the substrate is located on the side of the first scan signal line away from the substrate.
According to claim 3, in the display substrate, for at least one pixel driving circuit, the second scan signal line connected to the pixel driving circuit is located between the orthographic projection of at least one of the structures of the first electrode of the compensation transistor, the first plate of the capacitor, and the control electrode of the driving transistor on the substrate and the orthographic projection of the first scan signal line connected to the pixel driving circuit on the substrate.
According to claim 3, the second terminal of the driving transistor is electrically connected to the second terminal of the first initial transistor and the second terminal of the compensation transistor, respectively. For at least one pixel driving circuit, the orthographic projection of at least one of the structures of the second terminal of the driving transistor, the second terminal of the first initial transistor, and the second terminal of the compensation transistor onto the substrate is at least equal to the orthographic projection of at least one of the first and second scan signal lines connected to the pixel driving circuit onto the substrate. Partial overlap.
According to the display substrate of claim 3, the first signal line further includes: a first reset signal line, wherein the control electrode of the first initial transistor of at least one pixel driving circuit is electrically connected to at least one of the plurality of first reset signal lines, and the first reset signal line extends at least partially along a first direction; For at least one pixel driving circuit, the orthographic projection of at least one of the structures of the first electrode of the compensation transistor, the first plate of the capacitor, and the control electrode of the driving transistor on the substrate does not overlap with the orthographic projection of the first reset signal line connected to the pixel driving circuit on the substrate, and the orthographic projection of the first reset signal line connected to the pixel driving circuit on the substrate is located on the side of the first scan signal line connected to the pixel driving circuit that is far away from the second scan signal line connected to the pixel driving circuit.
The display substrate according to claim 3 further includes: a plurality of light-emitting devices disposed on the substrate, at least one pixel driving circuit electrically connected to at least one light-emitting device, the at least one light-emitting device including: a first electrode, the first signal line further including: a second reset signal line, the plurality of transistors further including: a second initial transistor and a third initial transistor, for at least one pixel driving circuit, the control electrode of at least one of the second initial transistors and the third initial transistor is electrically connected to at least one of the plurality of second reset signal lines, the second electrode of the second initial transistor is electrically connected to the first electrode of the light-emitting device connected to the pixel driving circuit, the second electrode of the third initial transistor is electrically connected to the first electrode of the driving transistor, and the second reset signal line extends at least partially along a first direction; For at least one pixel driving circuit, the orthographic projection of at least one of the structures of the first electrode of the compensation transistor, the first plate of the capacitor, and the control electrode of the driving transistor on the substrate does not overlap with the orthographic projection of the second reset signal line connected to the pixel driving circuit on the substrate, and the orthographic projection of the second reset signal line connected to the pixel driving circuit on the substrate is located on the side of at least one of the structures of the first electrode of the compensation transistor, the first plate of the capacitor, and the control electrode of the driving transistor in the pixel driving circuit that is away from the second scan signal line connected to the pixel driving circuit.
According to the display substrate of claim 8, the first signal line further includes: a light-emitting signal line, and at least one pixel driving circuit includes: a first light-emitting transistor and a second light-emitting transistor, the control electrode of at least one of the first light-emitting transistor and the second light-emitting transistor is electrically connected to the light-emitting signal line, the second electrode of the first light-emitting transistor is electrically connected to the first electrode of the driving transistor, the first electrode of the second light-emitting transistor is electrically connected to the second electrode of the driving transistor, and the light-emitting signal line extends along a first direction. For at least one pixel driving circuit, the orthographic projection of at least one of the structures of the first electrode of the compensation transistor, the first plate of the capacitor, and the control electrode of the driving transistor on the substrate does not overlap with the orthographic projection of the light-emitting signal line connected to the pixel driving circuit on the substrate, and the light-emitting signal line connected to the pixel driving circuit is located between the orthographic projection of at least one of the structures of the first electrode of the compensation transistor, the first plate of the capacitor, and the control electrode of the driving transistor in the pixel driving circuit and the second reset signal line connected to the pixel driving circuit on the substrate.
According to the display substrate of claim 9, wherein the first signal line further includes: a first initial signal line, wherein the first electrode of the first initial transistor in at least one pixel driving circuit is electrically connected to at least one of the plurality of first initial signal lines, and the first initial signal line extends along a first direction; For at least one pixel driving circuit, the orthographic projection of at least one of the structures of the first electrode of the compensation transistor, the first plate of the capacitor, and the control electrode of the driving transistor on the substrate does not overlap with the orthographic projection of the first initial signal line connected to the pixel driving circuit on the substrate, and the orthographic projection of the first initial signal line connected to the pixel driving circuit on the substrate is located on the side of the first scan signal line connected to the pixel driving circuit that is far away from the second scan signal line connected to the pixel driving circuit.
According to claim 9, the display substrate further includes: a second initial signal. The first terminal of the second initial transistor in at least one pixel driving circuit is electrically connected to at least one of a plurality of second initial signal lines, the second initial signal lines extending along a first direction; For at least one pixel driving circuit, the orthographic projection of at least one of the structures of the first electrode of the compensation transistor, the first plate of the capacitor, and the control electrode of the driving transistor on the substrate does not overlap with the orthographic projection of the second initial signal line connected to the pixel driving circuit on the substrate, and the orthographic projection of the second initial signal line connected to the pixel driving circuit on the substrate is located on the side of the second reset signal line connected to the pixel driving circuit that is far away from the first scan signal line connected to the pixel driving circuit.
According to the display substrate of claim 11, wherein, for at least one pixel driving circuit, the orthographic projection of the second initial signal line connected to the pixel driving circuit on the substrate at least partially overlaps with the orthographic projection of at least one of the first reset signal line and the first initial signal line connected to the next row of pixel driving circuits on the substrate.
According to claim 9, the display substrate further includes: a third initial signal line, wherein the first electrode of the third initial transistor in at least one pixel driving circuit is electrically connected to at least one of the plurality of third initial signal lines, and the third initial signal line extends along a first direction; For at least one pixel driving circuit, the orthographic projection of at least one of the structures of the first electrode of the compensation transistor, the first plate of the capacitor, and the control electrode of the driving transistor on the substrate does not overlap with the orthographic projection of the third initial signal line connected to the pixel driving circuit on the substrate, and the orthographic projection of the third initial signal line connected to the pixel driving circuit on the substrate at least partially overlaps with the orthographic projection of the second reset signal line connected to the pixel driving circuit on the substrate.
According to the display substrate of claim 13, the orthographic projections of the third initial signal line connected to the pixel driving circuit and the light emission signal line connected to the pixel driving circuit on the substrate do not overlap.
According to claim 1, the display substrate wherein the circuit structures of at least two adjacent pixel driving circuits located in the same row are symmetrically arranged and intersect with respect to a virtual straight line extending along a second direction.
According to claim 1, the display substrate, wherein the first signal line includes: a first scan signal line, a second scan signal line, a first reset signal line, a second reset signal line, a first initial signal line, a second initial signal line, and a third initial signal line; the second reset signal line includes: a first scan line and a second scan line; the plurality of transistors includes: at least one P-type transistor and at least one N-type transistor; at least one transistor in the plurality of transistors further includes: an active pattern; the capacitor further includes: a second electrode plate; the display substrate further includes: a circuit structure layer; the circuit structure layer includes: a first semiconductor layer, a first conductive layer, a second conductive layer, a second semiconductor layer, a third conductive layer, and a fourth conductive layer sequentially stacked on the substrate; The first semiconductor layer includes: an active pattern of at least one P-type transistor located in at least one pixel driving circuit; The first conductive layer includes: a first scan signal line, a light emission signal line, a first reset signal line, a second reset signal line, and a control electrode of at least one P-type transistor located in at least one pixel driving circuit and a first electrode of a capacitor; The second conductive layer includes: a first scan line of at least one of the second scan signal lines, a first initial signal line, and a second plate of a capacitor located in at least one pixel driving circuit; The second semiconductor layer includes: an active pattern of at least one P-type transistor located in at least one pixel driving circuit; The third conductive layer includes: a second scan line, a second initial signal line, and a third initial signal line, all of which are second scan signal lines; The fourth conductive layer includes: a first electrode and a second electrode of at least one transistor located in at least one pixel driving circuit.
A display device comprising: a display substrate as described in any one of claims 1 to 16.

Description

Display substrate and display device Technical Field This disclosure relates to, but is not limited to, the display field, and specifically to a display substrate and a display device. Background Technology Organic light-emitting diodes (OLEDs) and quantum dot light-emitting diodes (QLEDs) are active-matrix display devices with advantages such as self-illumination, wide viewing angle, high contrast, low power consumption, extremely fast response speed, thinness, flexibility, and low cost. With the continuous development of display technology, flexible displays using OLEDs or QLEDs as light-emitting devices and controlled by thin-film transistors (TFTs) have become the mainstream products in the display field. Summary of the Invention The following is an overview of the subject matter described in detail in this disclosure. This overview is not intended to limit the scope of the claims. This disclosure provides a display substrate and a display device. In a first aspect, this disclosure provides a display substrate, including: a substrate and a plurality of pixel driving circuits and a plurality of first signal lines disposed on the substrate, wherein at least one pixel driving circuit includes: a plurality of transistors, and at least one transistor includes: a control electrode, a first electrode and a second electrode, wherein the control electrode of at least one transistor in at least one pixel driving circuit is electrically connected to at least one of the plurality of first signal lines. The pixel driving circuit further includes a capacitor, the capacitor including a first electrode plate, and the plurality of transistors including a driving transistor and a compensation transistor, wherein the first electrode of the compensation transistor and the first electrode plate of the capacitor are respectively electrically connected to the control electrode of the driving transistor. The orthographic projection of at least one of the structures of the first electrode of the compensation transistor, the first plate of the capacitor, and the control electrode of the driving transistor in at least one pixel driving circuit onto the substrate does not overlap with the orthographic projection of at least one of the plurality of first signal lines onto the substrate. In an exemplary embodiment, the plurality of transistors further includes: a first initial transistor, the first signal line including: a first scan signal line, the control electrode of the first initial transistor in at least one pixel driving circuit being electrically connected to at least one of the plurality of first scan signal lines, the first scan signal line extending at least partially along a first direction; For at least one pixel driving circuit, the orthographic projection of at least one of the structures of the first electrode of the compensation transistor, the first plate of the capacitor, and the control electrode of the driving transistor on the substrate does not overlap with the orthographic projection of the first scan signal line connected to the pixel driving circuit on the substrate. In an exemplary embodiment, the compensation transistor is an N-type transistor, and the first signal line includes a second scan signal line. The control electrode of the compensation transistor in at least one pixel driving circuit is electrically connected to at least one of the multiple second scan signal lines, and the second scan signal line extends at least partially along a first direction. For at least one pixel driving circuit, the orthographic projection of at least one of the structures of the first electrode of the compensation transistor, the first plate of the capacitor, and the control electrode of the driving transistor on the substrate does not overlap with the orthographic projection of the second scan signal line connected to the pixel driving circuit on the substrate. In an exemplary embodiment, the second scan signal line includes: a first scan line and a second scan line that are interconnected. Line; at least one signal line of the first scan line and the second scan line extends at least partially along the first direction; For at least one second scan signal line, the orthographic projection of the first scan line on the substrate at least partially overlaps with the orthographic projection of the second scan line on the substrate, and the orthographic projection of at least one of the first scan line and the second scan line on the substrate is located on the side of the first scan signal line away from the substrate. In an exemplary embodiment, for at least one pixel driving circuit, the second scan signal line connected to the pixel driving circuit is located between the orthographic projection of at least one of the structures of the first electrode of the compensation transistor, the first plate of the capacitor, and the control electrode of the driving transistor on the substrate and the orthographic projection