CN-122003043-A - Display substrate and display device

Abstract

The embodiment of the disclosure provides a display substrate and a display device. The display substrate comprises a plurality of repeating units, at least one repeating unit comprises a display unit and a light transmission unit, the display unit is configured to display images on two sides, the light transmission unit is configured to transmit light, the display unit comprises 2n circuit units and 2n light-emitting units, the 2n light-emitting units comprise n first-type light-emitting units and n second-type light-emitting units, the emergent light of the first-type light-emitting units is in a bottom emission mode, the emergent light of the second-type light-emitting units is in a top emission mode, the 2n circuit units comprise n first-type circuit units and n second-type circuit units, a pixel driving circuit of the first-type circuit unit is connected with the first-type light-emitting units, and a pixel driving circuit of the second-type circuit unit is connected with the second-type light-emitting units. The present disclosure achieves a transparent display on both sides by the organic combination of a top emission structure and a bottom emission structure in one repeating unit.

Inventors

• YUAN CAN

Assignees

• 合肥鑫晟光电科技有限公司
• 京东方科技集团股份有限公司

Dates

Publication Date

20260508

Application Date

20241107

Claims (20)

1. 1.A display substrate comprising a plurality of repeating units, at least one repeating unit comprising a display unit configured to perform double-sided image display and a light-transmitting unit located on at least one side of the display unit, the light-transmitting unit configured to transmit light; in the direction perpendicular to the display substrate, the display substrate at least comprises a driving circuit layer arranged on a base and a light-emitting structure layer arranged on one side of the driving circuit layer far away from the base, wherein the driving circuit layer of the display unit comprises 2n circuit units, the light-emitting structure layer of the display unit comprises 2n light-emitting units, the circuit units at least comprise pixel driving circuits, the light-emitting units at least comprise light-emitting devices, the light-emitting devices are connected with the pixel driving circuits of the corresponding circuit units, and n is 3 or 4; the 2n light-emitting units comprise n first-class light-emitting units and n second-class light-emitting units, wherein the emergent light rays of the first-class light-emitting units are in a bottom emission mode, the emergent light rays of the second-class light-emitting units are in a top emission mode, or the emergent light rays of the first-class light-emitting units are in a top emission mode, the emergent light rays of the second-class light-emitting units are in a bottom emission mode, the 2n circuit units comprise n first-class circuit units and n second-class circuit units, a pixel driving circuit in the first-class circuit units is connected with a light-emitting device in the first-class light-emitting units, a pixel driving circuit in the second-class circuit units is connected with a light-emitting device in the second-class light-emitting units, and the pixel driving circuit at least comprises a first transistor, a second transistor, a third transistor and a third transistor, the circuit comprises a first node electrode with a first node potential and a second node electrode with a second node potential, wherein a second pole of the first transistor and a gate electrode of the second transistor are connected with the first node electrode, a second pole of the second transistor and a second pole of the third transistor are connected with the second node electrode, at least one circuit unit, at least one repeating unit and at least one 2n circuit unit, wherein the first transistor, the second transistor and the third transistor are sequentially arranged along a first direction, and the first direction and the second direction are intersected.
2. 2. The display substrate according to claim 1, wherein the n first light emitting units include at least a first light emitting unit of a first type emitting light of a first color, a second light emitting unit of a first type emitting light of a second color, and a third light emitting unit of a first type emitting light of a third color, and the n second light emitting units include at least a first light emitting unit of a second type emitting light of the first color, a second light emitting unit of a second type emitting light of the second color, and a third light emitting unit of a second type emitting light of the third color; the n first type circuit units at least comprise first type first circuit units connected with the first type first light emitting units, first type second circuit units connected with the first type second light emitting units and first type third circuit units connected with the first type third light emitting units, the n second type circuit units at least comprise second type first circuit units connected with the second type first light emitting units, second type second circuit units connected with the second type second light emitting units and second type third circuit units connected with the second type third light emitting units, and the first type first circuit units, the second type first circuit units, the first type second circuit units, the second type second circuit units, the first type third circuit units and the second type third circuit units are sequentially arranged along the second direction.
3. 3. The display substrate according to claim 2, wherein the first light-emitting unit, the first second light-emitting unit and the first third light-emitting unit are sequentially arranged along the second direction to form a first light-emitting unit group, the second first light-emitting unit, the second light-emitting unit and the second third light-emitting unit are sequentially arranged along the second direction to form a second light-emitting unit group, and the first light-emitting unit group is arranged on one side of the first direction of the second light-emitting unit group.
4. 4. The display substrate according to claim 1, wherein the n first light emitting units include at least a first light emitting unit of a first type emitting light of a first color, a second light emitting unit of a first type emitting light of a second color, and a third light emitting unit of a first type emitting light of a third color, and the n second light emitting units include at least a first light emitting unit of a second type emitting light of the first color, a second light emitting unit of a second type emitting light of the second color, and a third light emitting unit of a second type emitting light of the third color; the n first type circuit units at least comprise first type first circuit units connected with the first type first light emitting units, first type second circuit units connected with the first type second light emitting units and first type third circuit units connected with the first type third light emitting units, the n second type circuit units at least comprise second type first circuit units connected with the second type first light emitting units, second type second circuit units connected with the second type second light emitting units and second type third circuit units connected with the second type third light emitting units, and the first type first circuit units, the first type second circuit units, the first type third circuit units, the second type first circuit units, the second type second circuit units and the second type third circuit units are sequentially arranged along the second direction.
5. 5. The display substrate according to claim 4, wherein the first light-emitting unit, the first second light-emitting unit and the first third light-emitting unit are sequentially arranged along the second direction to form a third light-emitting unit group, the second first light-emitting unit and the second light-emitting unit are sequentially arranged along the second direction to form a fourth light-emitting unit group, the third light-emitting unit group is arranged on one side of the fourth light-emitting unit group in the first direction, and the second third light-emitting unit group is arranged on one side of the third light-emitting unit group and the fourth light-emitting unit group in the second direction.
6. 6. The display substrate according to any one of claims 1 to 5, wherein at least one of the repeating units further includes a scanning signal line having a shape of a straight line or a folded line extending along the first direction, and the first transistor and the third transistor in 2n circuit units in the repeating unit are connected to the same scanning signal line.
7. 7. The display substrate according to claim 6, wherein at least one of the repeating units further includes a first gate line and a third gate line connected to the scanning signal line, the first gate line and the third gate line having a shape of a straight line or a folded line extending in a second direction, the third gate line being provided at one side of the first gate line in the first direction, the first gate line being connected to gate electrodes of the first transistors of 2n circuit units in the repeating unit, respectively, and the third gate line being connected to gate electrodes of the third transistors of 2n circuit units in the repeating unit, respectively.
8. 8. The display substrate according to claim 7, wherein at least one repeating unit further comprises a first power line, a second power line, a compensation signal line, and 2n data signal lines, wherein first poles of the second transistors of 2n circuit units in the repeating unit are connected to the same first power line, first poles of the third transistors of 2n circuit units in the repeating unit are connected to the same compensation signal line, and first poles of the first transistors of 2n circuit units in the repeating unit are respectively connected to the 2n data signal lines.
9. 9. The display substrate according to claim 8, wherein the first power line, the second power line, the compensation signal line, and the data signal line are in a linear or folded shape extending along the second direction, wherein the second power line is disposed at a side of the first gate line away from the third gate line in the first direction, the 2n data signal lines are disposed between the first gate line and the second power line, the compensation signal line is disposed at a side of the third gate line away from the first gate line, and the first power line is disposed between the first gate line and the third gate line in the first direction.
10. 10. The display substrate according to any one of claims 1 to 5, wherein the pixel driving circuit further comprises a storage capacitor, and wherein a structure of the storage capacitor in the first type circuit unit is different from a structure of the storage capacitor in the second type circuit unit.
11. 11. The display substrate according to claim 10, wherein the outgoing light of the first type of light emitting unit is in a bottom emission mode, the outgoing light of the second type of light emitting unit is in a top emission mode, the first type of circuit unit is a bottom emission circuit unit, and the second type of circuit unit is a top emission circuit unit, wherein the storage capacitor at least comprises a transparent first polar plate and a transparent second polar plate, the front projection of the second polar plate on the substrate at least partially overlaps the front projection of the first polar plate on the substrate, the first polar plate is connected with the second node electrode, the second polar plate is connected with the first node electrode, and the first polar plate and the second polar plate form the transparent storage capacitor in the bottom emission circuit unit.
12. 12. The display substrate according to claim 11, wherein the display substrate includes at least a first transparent conductive layer provided on a base, a first conductive layer provided on a side of the first transparent conductive layer away from the base, and a semiconductor layer provided on a side of the first conductive layer away from the base, in a direction perpendicular to the display substrate, the first electrode plate is provided in the first transparent conductive layer, and the second electrode plate is provided in the semiconductor layer.
13. 13. The display substrate according to claim 10, wherein the outgoing light of the first type of light emitting unit is in a bottom emission mode, the outgoing light of the second type of light emitting unit is in a top emission mode, the first type of circuit unit is a bottom emission circuit unit, the second type of circuit unit is a top emission circuit unit, at least one of the top emission circuit units, the storage capacitor at least comprises a third plate, a fourth plate and a fifth plate, the orthographic projection of the fourth plate on the substrate at least partially overlaps the orthographic projection of the third plate on the substrate, the orthographic projection of the fifth plate on the substrate at least partially overlaps the orthographic projection of the fourth plate on the substrate, the third plate and the fifth plate are connected with the second node electrode, the fourth plate is connected with the first node electrode, the third plate and the fourth plate form a first sub-capacitor, the fourth plate and the fifth plate form a second sub-capacitor, and the first sub-capacitor and the second sub-capacitor in parallel form the storage capacitor in the top emission circuit.
14. 14. The display substrate according to claim 13, wherein in a direction perpendicular to the display substrate, the display substrate includes at least a first transparent conductive layer provided on the base, a first conductive layer provided on a side of the first transparent conductive layer away from the base, a semiconductor layer provided on a side of the first conductive layer away from the base, a second conductive layer provided on a side of the semiconductor layer away from the base, and a third conductive layer provided on a side of the second conductive layer away from the base, the third electrode plate being provided in the first conductive layer, the fourth electrode plate being provided in the semiconductor layer, and the fifth electrode plate being provided in the third conductive layer.
15. 15. The display substrate according to any one of claims 1 to 5, wherein the outgoing light of the first type of light emitting unit is in a bottom emission mode, the outgoing light of the second type of light emitting unit is in a top emission mode, the first type of light emitting unit comprises at least a first anode, the second type of light emitting unit comprises at least a second anode, and the structure of the first anode is different from the structure of the second anode.
16. 16. The display substrate according to claim 15, wherein the first anode includes at least a main body portion and a connection portion, the main body portion is disposed in the display unit, a first end of the connection portion is connected to the main body portion, and a second end of the connection portion extends to the light transmitting unit and is connected to the pixel driving circuit of the first type circuit unit.
17. 17. The display substrate according to claim 15, wherein the second anode includes at least a first sub-anode, a second sub-anode, and a sub-connection electrode, the first sub-anode and the second sub-anode being disposed in the display unit and being isolated from each other, one end of the sub-connection electrode being connected to the first sub-anode and the second sub-anode, respectively, and the other end of the sub-connection electrode being connected to a pixel driving circuit of the second type circuit unit after extending to the light transmitting unit.
18. 18. The display substrate of claim 17, wherein the second type of light emitting cell further comprises a third anode comprising at least a first reflective electrode and a second reflective electrode disposed in the display cell and spaced apart from each other, an orthographic projection of the first reflective electrode on the substrate at least partially overlapping and overlapping with an orthographic projection of the first sub-anode on the substrate, and an orthographic projection of the second reflective electrode on the substrate at least partially overlapping and overlapping with an orthographic projection of the second sub-anode on the substrate.
19. 19. The display substrate of claim 15, wherein the first type of light emitting cells further comprise a first cathode, the second type of light emitting cells further comprise a second cathode, the first cathode and the second cathode are isolated from each other, the first cathode is a reflective material, and the second cathode is a transparent material.
20. 20. The display substrate of claim 19, wherein the first type of light emitting unit further comprises a third cathode overlapping the first cathode, the second cathode and the third cathode being co-layered and integrally formed with each other.

Description

Display substrate and display device Technical Field The present disclosure relates to the field of display technologies, and in particular, to a display substrate and a display device. Background An Organic LIGHT EMITTING Diode (OLED) is an active light emitting display device, and has advantages of active light emission, ultra-thin, wide viewing angle, high brightness, high contrast, low power consumption, extremely high reaction speed, light and thin, heteromorphic, flexible display, etc., and has gradually become a next generation display technology with great development prospects. The Active Matrix (AM) OLED is a current driving device, and each circuit unit is controlled by an independent transistor (Thin Film Transistor, TFT), and each circuit unit can continuously and independently drive light. With the continuous development of display technology, OLED technology is increasingly applied to transparent displays. Transparent display is an important personalized display field of display technology, and refers to image display in a transparent state, so that a viewer can see not only an image in a display device, but also a scene behind the display device, and Virtual Reality (VR) and Augmented Reality (AR) and 3D display functions can be realized. Currently, OLED transparent display devices mainly display on one side. Disclosure of Invention The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims. The technical problem to be solved by the embodiments of the present disclosure is to provide a display substrate and a display device, so as to realize transparent display on both sides. In one aspect, embodiments of the present disclosure provide a display substrate including a plurality of repeating units, at least one repeating unit including a display unit configured to perform double-sided image display and a light transmitting unit located at least one side of the display unit, the light transmitting unit configured to transmit light; in the direction perpendicular to the display substrate, the display substrate at least comprises a driving circuit layer arranged on a base and a light-emitting structure layer arranged on one side of the driving circuit layer far away from the base, wherein the driving circuit layer of the display unit comprises 2n circuit units, the light-emitting structure layer of the display unit comprises 2n light-emitting units, the circuit units at least comprise pixel driving circuits, the light-emitting units at least comprise light-emitting devices, the light-emitting devices are connected with the pixel driving circuits of the corresponding circuit units, and n is 3 or 4; the 2n light-emitting units comprise n first-class light-emitting units and n second-class light-emitting units, wherein the emergent light rays of the first-class light-emitting units are in a bottom emission mode, the emergent light rays of the second-class light-emitting units are in a top emission mode, or the emergent light rays of the first-class light-emitting units are in a top emission mode, the emergent light rays of the second-class light-emitting units are in a bottom emission mode, the 2n circuit units comprise n first-class circuit units and n second-class circuit units, a pixel driving circuit in the first-class circuit units is connected with a light-emitting device in the first-class light-emitting units, a pixel driving circuit in the second-class circuit units is connected with a light-emitting device in the second-class light-emitting units, and the pixel driving circuit at least comprises a first transistor, a second transistor, a third transistor and a third transistor, the circuit comprises a first node electrode with a first node potential and a second node electrode with a second node potential, wherein a second pole of the first transistor and a gate electrode of the second transistor are connected with the first node electrode, a second pole of the second transistor and a second pole of the third transistor are connected with the second node electrode, at least one circuit unit, at least one repeating unit and at least one 2n circuit unit, wherein the first transistor, the second transistor and the third transistor are sequentially arranged along a first direction, and the first direction and the second direction are intersected. In an exemplary embodiment, the n first light emitting units at least include a first light emitting unit emitting light of a first color, a second light emitting unit emitting light of a second color, and a third light emitting unit emitting light of a third color, the n second light emitting units at least include a first light emitting unit emitting light of the first color, a second light emitting unit emitting light of the second color, and a third light emitting unit emitting light of the third color, the n first circuit units at least include a first circuit unit co