Display panel

Abstract

The application provides a display panel, which comprises a substrate, a pixel driving circuit layer on the substrate, a light emitting device layer on the pixel driving circuit layer and an auxiliary wire; wherein the pixel driving circuit layer comprises a first conductive layer, the first conductive layer comprises a first power voltage line, the light emitting device layer comprises a first electrode, a second electrode and a light emitting part electrically connected to the first electrode and the second electrode, the first electrode is electrically connected to a pixel driving circuit of the pixel driving circuit layer, the second electrode is electrically connected to the first power voltage line, and the auxiliary wire is connected in parallel with the first power voltage line. According to the embodiment of the application, the auxiliary wire is connected in parallel with the first power voltage line, so that the voltage drop on the first power voltage line is reduced, and the power consumption of the screen body is reduced.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a display panel. Background Technology

[0002] Reducing the power consumption of AMOLED (Active-matrix organic light-emitting diode) display panels is a crucial issue for panel design and manufacturing companies, and it's also an inevitable trend in the development of high-end display panels. However, currently used display panels generally have relatively high screen power consumption, which mainly consists of three parts: ① power consumption of the driving transistors; ② power consumption of the EL display elements; ③ heat dissipation from the metal traces. Screen power consumption is primarily determined by the voltage difference (VDD-VSS) and current within the screen, i.e.:

[0003] Power = (VDD - VSS) * Ivss

[0004] Where Ivss is the sum of the operating currents of all light-emitting EL devices, its magnitude is determined by the panel brightness setting and the EL device efficiency. The lower the panel brightness or the higher the EL efficiency, the smaller the required Ivss and the lower the power consumption. And the voltage difference:

[0005] VDD-VSS=VDD IR drop+Vds+Von+VSS IR drop

[0006] VDD represents the drive voltage of the panel power signal, and VSS is the common cathode voltage of the panel's EL devices. A series of components are located between VDD and VSS, such as... Figure 1 The diagram shows: ① Power supply metal trace; ② Driving thin-film transistor (DTFT); ③ OLED light-emitting pixel; ④ Cathode metal electrode. The function of the driving transistor DTFT is to control the current flowing through the DTFT by controlling the gate voltage of the DTFT, thereby controlling the brightness of the OLED device and the image size and brightness of the screen. The voltage difference between VDD and VSS will form a voltage drop across the above four components, mainly including: VDD IR drop and VSS IR drop due to the resistance of the power supply and cathode traces, the voltage divider Vds of the DTFT, and the operating voltage Von required for the OLED device to emit light.

[0007] like Figure 2As shown, the VSS wiring mainly consists of two parts: ① SD metal traces 21 that wrap around the left / right / bottom of the Panel; ② a full-surface cathode metal 22. The SD metal traces 21 are led in the lower border area of ​​the Panel and connected to the VSS signal input terminal. Outside the Panel display area, the SD traces and the cathode metal are electrically connected via vias, thus forming a complete VSS signal input. Typically, due to the limitations of the Panel border size, the width of the VSS traces on the SD metal is strictly required, and the sheet resistance of the cathode metal connected to the SD VSS signal line is relatively large. This results in a large voltage drop (VSS IR Drop, typically around 1.0V) on the SD VSS metal traces, leading to significant power consumption (=VSS IRDrop*Ivss) caused by metal heating.

[0008] Therefore, existing display panels have a technical problem of large IR drop on the first power supply voltage line (VSS), which needs to be improved. Summary of the Invention

[0009] The present invention provides a display panel to alleviate the technical problem of large IR drop on the first power supply voltage line in existing display panels.

[0010] To solve the above problems, the technical solution provided by the present invention is as follows:

[0011] This invention provides a display panel, comprising:

[0012] substrate;

[0013] A pixel driving circuit layer is located on the substrate and includes a first conductive layer, wherein the first conductive layer includes a first power supply voltage line;

[0014] The light-emitting device layer, located on the pixel driving circuit layer, includes a first electrode, a second electrode, and a light-emitting part electrically connected to the first electrode and the second electrode. The first electrode is electrically connected to the pixel driving circuit of the pixel driving circuit layer, and the second electrode is electrically connected to the first power supply voltage line.

[0015] The display panel also includes auxiliary traces, which are connected in parallel with the first power supply voltage line.

[0016] In the display panel provided in the embodiments of the present invention, the first conductive layer includes the auxiliary traces.

[0017] In the display panel provided in this embodiment of the invention, the auxiliary wiring is a grid structure.

[0018] In the display panel provided in the embodiments of the present invention, the display panel includes a first side and a second side disposed opposite to each other along a first direction, and a third side and a fourth side disposed opposite to each other along a second direction. The first direction and the second direction intersect. The first power supply voltage line includes a first segment extending along the first side, a second segment extending along the second side, and a third segment extending along the third side. The third segment is connected between the first segment and the second segment. The auxiliary trace is connected to the first segment, the second segment, and the third segment.

[0019] In the display panel provided in the embodiments of the present invention, the first conductive layer further includes a connecting portion, which is electrically connected between the first electrode and the pixel driving circuit. The connecting portion is spaced apart from the auxiliary trace and located within the grid of the auxiliary trace.

[0020] In the display panel provided in the embodiments of the present invention, the display panel includes a first side and a second side disposed opposite to each other along a first direction, and a third side and a fourth side disposed opposite to each other along a second direction, the first direction and the second direction intersecting each other. The first power supply voltage line includes a first segment extending along the first side, a second segment extending along the second side, and a third segment extending along the third side. The third segment is connected between the first segment and the second segment. The auxiliary wiring includes a plurality of first lines extending along the first side and a second line extending along the fourth side. The plurality of first lines are connected between the second line and the third segment, and the second line is connected between the first segment and the second segment.

[0021] In the display panel provided in the embodiments of the present invention, the first conductive layer further includes a connecting portion, which is electrically connected between the first electrode and the pixel driving circuit. The connecting portion is spaced apart from the auxiliary trace and located in the gap between the plurality of first lines and a second line grid of the auxiliary trace.

[0022] In the display panel provided in the embodiments of the present invention, the pixel driving circuit layer further includes a data line and a second power supply voltage line electrically connected to the pixel driving circuit, and the first conductive layer is disposed in a different layer from the data line and the second power supply voltage line.

[0023] In the display panel provided in the embodiments of the present invention, the pixel driving circuit layer further includes a second conductive layer, which is located below the first conductive layer and includes the source and drain of the transistor of the pixel driving circuit. The auxiliary trace includes a first sub-line and a second sub-line that are electrically connected to each other. The first conductive layer includes the first sub-line, and the second conductive layer includes the second sub-line.

[0024] In the display panel provided in this embodiment of the invention, the width of the first power supply voltage line located in the non-display area of ​​the display panel is greater than the width of the auxiliary trace located in the display area of ​​the display panel.

[0025] The beneficial effects of this invention are as follows: This invention provides a display panel; the display panel includes a substrate, a pixel driving circuit layer located on the substrate, a light-emitting device layer located on the pixel driving circuit layer, and auxiliary traces; the pixel driving circuit layer includes a first conductive layer, the first conductive layer including a first power supply voltage line; the light-emitting device layer includes a first electrode, a second electrode, and a light-emitting portion electrically connected to the first electrode and the second electrode, the first electrode being electrically connected to the pixel driving circuit of the pixel driving circuit layer, and the second electrode being electrically connected to the first power supply voltage line; the auxiliary traces are connected in parallel with the first power supply voltage line. By connecting auxiliary traces in parallel with the first power supply voltage line, this embodiment of the invention reduces the IR drop on the first power supply voltage line. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the pixel working circuit of a display panel in the prior art;

[0028] Figure 2 This is a schematic diagram of the VSS signal line layout in a conventional display panel in the prior art;

[0029] Figure 3 This is a schematic diagram of a first perspective structure of a display panel provided in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of a second perspective structure of a display panel provided in an embodiment of the present invention;

[0031] Figure 5 for Figure 3 or Figure 4 A cross-sectional schematic diagram of the display panel along the AA' direction. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0035] The present invention can alleviate the technical problem of large IR drop on the first power supply voltage line in existing display panels.

[0036] To address the aforementioned problems, this application provides a display panel. Specifically, the display panel provided by this application includes:

[0037] substrate;

[0038] A pixel driving circuit layer is located on the substrate and includes a first conductive layer, wherein the first conductive layer includes a first power supply voltage line;

[0039] The light-emitting device layer, located on the pixel driving circuit layer, includes a first electrode, a second electrode, and a light-emitting part electrically connected to the first electrode and the second electrode. The first electrode is electrically connected to the pixel driving circuit of the pixel driving circuit layer, and the second electrode is electrically connected to the first power supply voltage line.

[0040] The display panel also includes auxiliary traces, which are connected in parallel with the first power supply voltage line.

[0041] The display panel provided in this application will be described in detail below through specific embodiments.

[0042] In one embodiment, please refer to Figure 3 , Figure 4 and Figure 5 .like Figure 3 , Figure 4 or Figure 5 As shown, the display panel provided in this embodiment of the invention includes:

[0043] substrate 50;

[0044] A pixel driving circuit layer, located on the substrate 50, includes a first conductive layer 51, the first conductive layer 51 including a first power supply voltage line ( Figure 3 or Figure 4 V1, V2, and V3 in the text Figure 5 (not shown in the image);

[0045] The light-emitting device layer, located on the pixel driving circuit layer, includes a first electrode 53, a second electrode 54, and a light-emitting part 55 electrically connected to the first electrode 53 and the second electrode 54. The first electrode 53 is electrically connected to the pixel driving circuit of the pixel driving circuit layer, and the second electrode 54 is electrically connected to the first power supply voltage line.

[0046] The display panel also includes auxiliary wiring ( Figure 3 30 or Figure 4 31 or Figure 5 (52) The auxiliary trace is connected in parallel with the first power supply voltage line.

[0047] Specifically, the auxiliary trace is connected in parallel with the first power supply voltage line, which reduces the IR drop on the first power supply voltage line and thus reduces the power consumption of the screen.

[0048] It should be noted that the first power supply voltage line in the embodiments of the present invention is the cathode trace.

[0049] This invention provides a display panel comprising a substrate, a pixel driving circuit layer on the substrate, a light-emitting device layer on the pixel driving circuit layer, and auxiliary traces. The pixel driving circuit layer includes a first conductive layer, which includes a first power supply voltage line. The light-emitting device layer includes a first electrode, a second electrode, and a light-emitting portion electrically connected to the first electrode and the second electrode. The first electrode is electrically connected to the pixel driving circuit of the pixel driving circuit layer, and the second electrode is electrically connected to the first power supply voltage line. The auxiliary traces are connected in parallel with the first power supply voltage line. By connecting auxiliary traces in parallel with the first power supply voltage line, this embodiment of the invention reduces IR drop on the first power supply voltage line, thereby reducing screen power consumption.

[0050] In one embodiment, such as Figure 5 As shown, the first conductive layer 51 includes the auxiliary trace; specifically, the auxiliary trace is located in the display area 002 of the display panel and is connected in parallel with the first power supply voltage line to reduce the IR drop on the first power supply voltage line.

[0051] In one embodiment, such as Figure 3 As shown, the auxiliary traces have a mesh-like structure. Specifically, in the display area of ​​the display panel, the auxiliary traces do not need to be connected to the second electrode (i.e., the cathode), while in the non-display area of ​​the outer periphery of the display panel, the auxiliary traces need to be electrically connected to the second electrode. Furthermore, forming a mesh-like auxiliary trace layout in the display area can effectively reduce the IR Drop of the first power supply voltage line. For example, by calculating using the formula, heat dissipation = VSS IR Drop * Ivss. Since Ivss remains essentially unchanged, when the mesh-like auxiliary traces in this embodiment are connected in parallel with the first power supply voltage line, VSS IR Drop is significantly reduced, thereby effectively reducing the heat dissipation of the VSS signal line and thus reducing the power consumption of the screen.

[0052] In one embodiment, such as Figure 3 As shown, the display panel includes a first side (left) and a second side (right) arranged opposite to each other along a first direction Y, and a third side (lower) and a fourth side (upper) arranged opposite to each other along a second direction X. The first direction Y and the second direction X intersect. The first power supply voltage line (V1, V2 and V3) includes a first segment V1 extending along the first side, a second segment V2 extending along the second side, and a third segment V3 extending along the third side. The third segment V3 is connected between the first segment V1 and the second segment V2. The auxiliary trace is connected to the first segment V1, the second segment V2 and the third segment V3.

[0053] In one embodiment, such as Figure 5 As shown, the first conductive layer 51 further includes a connection portion 56, which is electrically connected between the first electrode 53 and the pixel driving circuit. The connection portion 56 is spaced apart from the auxiliary trace and located within the grid of the auxiliary trace.

[0054] It is understood that the connecting part 56 can be disposed on the same layer and with the same material as the auxiliary trace. The connecting part 56 is disposed within the grid of the auxiliary trace and does not contact the grid line. The connecting part 56 is electrically connected between the first electrode 53 and the drain 58 of the pixel driving circuit. The connecting part is only used for line replacement.

[0055] In another embodiment, such as Figure 4 As shown, the display panel includes a first side (left) and a second side (right) arranged opposite to each other along a first direction Y, and a third side (lower) and a fourth side (upper) arranged opposite to each other along a second direction X. The first direction Y and the second direction X intersect. The first power supply voltage lines (V1, V2, and V3) include a first segment V1 extending along the first side, a second segment V2 extending along the second side, and a third segment V3 extending along the third side. The third segment V3 is connected between the first segment V1 and the second segment V2. The auxiliary wiring includes a plurality of first lines 311 extending along the first side and a second line 312 extending along the fourth side. The plurality of first lines 311 are connected between the second line 312 and the third segment V3, and the second line 312 is connected between the first segment V1 and the second segment V2.

[0056] In this embodiment, the auxiliary traces no longer adopt a grid structure, but instead use multiple traces parallel to the long side of the display panel. Ultimately, these multiple auxiliary traces are electrically connected together in the upper / lower bezel area. Because multiple auxiliary traces are connected in parallel, VSS IR Drop can be effectively reduced, VSS trace heat dissipation power consumption can be reduced, and thus screen power consumption can be reduced.

[0057] In one embodiment, such as Figure 4 and Figure 5 As shown, the first conductive layer 51 further includes a connection portion 56, which is electrically connected between the first electrode 53 and the pixel driving circuit. The connection portion 56 is spaced apart from the auxiliary trace and located in the gap between the plurality of first lines 311 and a second line 312 grid of the auxiliary trace.

[0058] It is understood that the connecting part 56 can be disposed in the same layer and material as the auxiliary trace. The connecting part 56 is disposed in the gap between the grid of the plurality of first lines 311 and the second line 312 of the auxiliary trace, and does not contact the auxiliary trace. The connecting part 56 is electrically connected between the first electrode 53 and the drain 58 of the pixel driving circuit. The connecting part 56 is only used for line replacement.

[0059] In one embodiment, the pixel driving circuit layer further includes a data line and a second power supply voltage line electrically connected to the pixel driving circuit. The first conductive layer 51 is disposed on a different layer from both the data line and the second power supply voltage line. Specifically, in order to reduce layout interference between the first conductive layer and the data line and the second power supply voltage line (VDD), multiple layers of metal can be used to place the first conductive layer, the data line, and the second power supply voltage line (VDD) on different metal film layers. This can effectively reduce the trace density and reduce interference between signal lines. Therefore, in this embodiment, the first conductive layer is disposed on a different metal film layer from both the data line and the second power supply voltage line.

[0060] It should be noted that in this embodiment, the auxiliary traces are set with a single layer of metal, that is, the auxiliary traces are all set in the first conductive layer, on the same layer as the first power supply voltage line and connected in parallel.

[0061] In another embodiment, such as Figure 5 As shown, the pixel driving circuit layer further includes a second conductive layer 59, which is located below the first conductive layer 51 and includes the source 57 and drain 58 of the transistor of the pixel driving circuit. The auxiliary trace includes a first sub-line and a second sub-line that are electrically connected to each other. The first conductive layer 51 includes the first sub-line, and the second conductive layer 59 includes the second sub-line. It can be understood that in this embodiment, the auxiliary trace uses multiple layers of metal (such as the first conductive layer and the second conductive layer) alternately, that is, the first sub-line of the auxiliary trace is located in the first conductive layer, and the second sub-line of the auxiliary trace is located in the second conductive layer. It should be noted that the second sub-line is not intersected or overlapped with the source and the drain.

[0062] In one embodiment, the width of the first power supply voltage line located in the non-display area 001 of the display panel is greater than the width of the auxiliary trace located in the display area 002 of the display panel; specifically, since the space in the non-display area of ​​the display panel is relatively larger, the first power supply voltage line in the non-display area is relatively wider.

[0063] Accordingly, this application also provides a display device, including a display panel as provided in the embodiments of the present invention.

[0064] As can be seen from the above embodiments:

[0065] This invention provides a display panel; the display panel includes a substrate, a pixel driving circuit layer on the substrate, a light-emitting device layer on the pixel driving circuit layer, and auxiliary traces; the pixel driving circuit layer includes a first conductive layer, the first conductive layer including a first power supply voltage line; the light-emitting device layer includes a first electrode, a second electrode, and a light-emitting portion electrically connected to the first electrode and the second electrode, the first electrode being electrically connected to the pixel driving circuit of the pixel driving circuit layer, and the second electrode being electrically connected to the first power supply voltage line; the auxiliary traces are connected in parallel with the first power supply voltage line. By connecting auxiliary traces in parallel with the first power supply voltage line, this invention reduces IR drop on the first power supply voltage line, thereby reducing screen power consumption.

[0066] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A display panel, comprising: substrate; A pixel driving circuit layer is located on the substrate and includes a first conductive layer, wherein the first conductive layer includes a first power supply voltage line; The light-emitting device layer, located on the pixel driving circuit layer, includes a first electrode, a second electrode, and a light-emitting part electrically connected to the first electrode and the second electrode. The first electrode is electrically connected to the pixel driving circuit of the pixel driving circuit layer, and the second electrode is electrically connected to the first power supply voltage line. The display panel also includes auxiliary traces, which are connected in parallel with the first power supply voltage line; The display panel includes a first side and a second side disposed opposite to each other along a first direction, and a third side and a fourth side disposed opposite to each other along a second direction. The first direction and the second direction intersect. The first power supply voltage line includes a first segment extending along the first side, a second segment extending along the second side, and a third segment extending along the third side. The third segment is connected between the first segment and the second segment. The third side is located in the lower border area of ​​the display panel, and the third segment is located in the lower border area and connects end to end with the first segment and the second segment to form a closed loop.

2. The display panel according to claim 1, characterized in that, The first conductive layer includes the auxiliary trace.

3. The display panel according to claim 2, characterized in that, The auxiliary wiring has a mesh structure.

4. The display panel according to claim 3, characterized in that, The auxiliary wiring connects the first segment, the second segment, and the third segment.

5. The display panel according to claim 3, characterized in that, The first conductive layer further includes a connecting portion, which is electrically connected between the first electrode and the pixel driving circuit. The connecting portion is spaced apart from the auxiliary trace and located within the grid of the auxiliary trace.

6. The display panel according to claim 2, characterized in that, The auxiliary wiring includes a plurality of first lines extending along the first side and a second line extending along the fourth side. The plurality of first lines are connected between the second line and the third segment, and the second line is connected between the first segment and the second segment.

7. The display panel according to claim 6, characterized in that, The first conductive layer further includes a connecting portion electrically connected between the first electrode and the pixel driving circuit. The connecting portion is spaced apart from the auxiliary trace and located in the gap between the plurality of first lines and a second line grid of the auxiliary trace.

8. The display panel according to claim 2, characterized in that, The pixel driving circuit layer also includes a data line and a second power supply voltage line electrically connected to the pixel driving circuit, and the first conductive layer is disposed in a different layer from both the data line and the second power supply voltage line.

9. The display panel according to claim 2, characterized in that, The pixel driving circuit layer further includes a second conductive layer located below the first conductive layer and including the source and drain of the transistor of the pixel driving circuit. The auxiliary trace includes a first sub-line and a second sub-line electrically connected to each other. The first conductive layer includes the first sub-line, and the second conductive layer includes the second sub-line.

10. The display panel according to claim 1, characterized in that, The width of the first power supply voltage line located in the non-display area of ​​the display panel is greater than the width of the auxiliary trace located in the display area of ​​the display panel.

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