Display substrate and display device

Abstract

The present disclosure provides a display substrate and a display device, belonging to the field of display technology, which can solve the existing problem that adjacent signal lines in a fan-out area are easily connected together to cause short circuits, causing display defects such as ghosting. The display substrate disclosed in the present disclosure has a display area and a fan-out area located on one side of the display area, and the fan-out area is divided into a plurality of sub-fan-out areas extending in the same direction. The display substrate includes: a substrate, a first signal line and a second signal line located on the substrate; the first signal line and the second signal line are respectively arranged in any two non-adjacent sub-fan-out areas among the plurality of sub-fan-out areas.

Description

Technical Field

[0001] The present disclosure belongs to the field of display technology, and particularly relates to a display substrate and a display device. Background Art

[0002] Organic Light-Emitting Device (OLED) is a light-emitting device that uses organic solid-state semiconductors as light-emitting materials. It has broad application prospects due to its advantages such as simple preparation process, low cost, low power consumption, high luminous brightness, and wide operating temperature adaptability.

[0003] In current OLED display substrates, when signal lines pass through the fan-out area, they often need to bend from both sides of the display substrate to the center position, so that the distance between adjacent signal lines is reduced, which makes it easy for adjacent signal lines to be connected together, causing a short circuit. Specifically, when a low-level power signal line and a gate signal test line are short-circuited, the low-level signal transmitted by the low-level signal line is easily mistakenly transmitted to the gate signal test line, causing the high-level signal transmitted in the gate signal test line to be pulled down, affecting the gate signal input into the display substrate, causing ghosting and affecting the display effect. It also reduces the production yield of the display substrate, increases the preparation cost, affects the product quality of the display substrate, and thus reduces the user experience. Summary of the invention

[0004] The present disclosure aims to solve at least one of the technical problems existing in the prior art and provide a display substrate and a display device.

[0005] In a first aspect, an embodiment of the present disclosure provides a display substrate, comprising a display area and a fan-out area located on one side of the display area, wherein the fan-out area is divided into a plurality of sub-fan-out areas extending in the same direction, the display substrate comprising: a substrate, a first signal line and a second signal line located on the substrate;

[0006] The first signal line and the second signal line are respectively arranged in any two non-adjacent sub-fan-out areas among the plurality of sub-fan-out areas.

[0007] Optionally, the display substrate further comprises: a first redundant structure located on the base;

[0008] The first redundant structure is disposed in the sub-fan-out area between the sub-fan-out area where the first signal line is located and the sub-fan-out area where the second signal line is located.

[0009] Optionally, the material of the first redundant structure is an insulating material.

[0010] Optionally, the first signal line includes: a low-level power supply voltage line; and the second signal line includes: a gate signal test line.

[0011] Optionally, the display substrate further comprises: a touch signal line located on the base;

[0012] The touch signal line is arranged in the sub-fan-out area between the sub-fan-out area where the low-level power supply voltage line is located and the sub-fan-out area where the gate signal test line is located.

[0013] Optionally, the display substrate further comprises: a flexible circuit board and a touch display driver chip located on the base;

[0014] The flexible circuit board is connected to the low-level power supply voltage line and the gate signal test line;

[0015] The touch display driving chip is arranged on the flexible circuit board.

[0016] Optionally, the display substrate further comprises: a gate driving circuit; the gate driving circuit comprises a plurality of cascaded shift registers;

[0017] The plurality of shift registers are connected to the gate signal test line.

[0018] In a second aspect, an embodiment of the present disclosure provides a display substrate, comprising a display area and a fan-out area arranged on one side of the display area, wherein the fan-out area is divided into a plurality of sub-fan-out areas extending in the same direction, the display substrate comprising: a substrate, a third signal line located on the substrate;

[0019] The third signal line is arranged in any one of the plurality of sub-fan-out areas, and at least one of the sub-fan-out areas adjacent to the sub-fan-out area where the third signal line is located is not arranged with a signal line.

[0020] Optionally, the display substrate further comprises: a second redundant structure located on the base;

[0021] The second redundant structure is disposed in the sub-fan-out area adjacent to the sub-fan-out area where the third signal line is located.

[0022] Optionally, the material of the second redundant structure is an insulating material.

[0023] Optionally, the third signal line includes: a low-level power supply voltage line.

[0024] In a third aspect, an embodiment of the present disclosure provides a display device, wherein the display device comprises the display substrate provided above. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1is a schematic structural diagram of an exemplary display substrate;

[0026] Figure 2 A schematic structural diagram of a display substrate provided in an embodiment of the present disclosure;

[0027] Figure 3 A schematic structural diagram of another display substrate provided in an embodiment of the present disclosure;

[0028] Figure 4 A schematic structural diagram of another display substrate provided in an embodiment of the present disclosure;

[0029] Figure 5 A schematic diagram of the structure of another display substrate provided in an embodiment of the present disclosure;

[0030] Figure 6 A schematic structural diagram of another display substrate provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one", "one" or "the" do not indicate quantity restrictions, but indicate that there is at least one. Similar words such as "include" or "comprise" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Similar words such as "connect" or "connected" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] Figure 1 is a schematic diagram of the structure of an exemplary display substrate, such as Figure 1As shown, the display substrate has a display area and a fan-out area located on one side of the display area, and the fan-out area is divided into a plurality of sub-fan-out areas extending in the same direction; the display substrate includes: a substrate 101, a plurality of signal lines 102 located on the substrate 101; the plurality of signal lines 102 are respectively arranged in each sub-fan-out area. The display substrate also includes: a plurality of pixel units 103 arranged in an array on the substrate 101; the plurality of signal lines 102 can provide driving signals for each pixel unit 103 to realize the display function. In the current display substrate, when each signal line 102 passes through the fan-out area, it is often necessary to bend from both sides of the display substrate to the center position, so that the distance between adjacent signal lines 102 is reduced, which makes it easy for adjacent signal lines 102 to be connected together, causing a short circuit. Specifically, when a short circuit occurs between the low-level power supply signal line and the gate signal test line, the low-level signal transmitted by the low-level signal line is easily mistakenly transmitted to the gate signal test line, causing the high-level signal transmitted in the gate signal test line to be pulled down, affecting the gate signal input to the display substrate, causing ghosting and affecting the display effect. It also reduces the production yield of the display substrate, increases the preparation cost, affects the product quality of the display substrate, and thus reduces the user experience.

[0034] In order to solve at least one of the above-mentioned technical problems, the embodiments of the present disclosure provide a display substrate and a display device. The display substrate and the display device provided by the embodiments of the present disclosure will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] Figure 2 A schematic diagram of the structure of a display substrate provided in an embodiment of the present disclosure is shown in FIG. Figure 2 As shown, the display substrate has a display area and a fan-out area located on one side of the display area, the fan-out area is divided into a plurality of sub-fan-out areas extending in the same direction, and the display substrate includes: a substrate 101, a first signal line 104 and a second signal line 105 located on the substrate 101; the first signal line 104 and the second signal line 105 are respectively arranged in any two non-adjacent sub-fan-out areas among the plurality of sub-fan-out areas.

[0036] For example, the substrate 101 can be made of a rigid material such as glass, which can improve the bearing capacity of the substrate 101 for other film layers thereon. Of course, the substrate 101 can also be made of a flexible material such as polyimide (PI), which can improve the bending and stretching resistance of the overall display substrate, and avoid the stress generated during bending, stretching, and twisting that causes the substrate 101 to break and cause a short circuit. In practical applications, the material of the substrate 101 can be reasonably selected according to actual needs to ensure that the display substrate has good performance.

[0037] The first signal line 104 and the second signal line 105 can be made of metal materials or alloy materials, such as a metal single layer or multilayer structure formed by a metal material including molybdenum, aluminum or titanium or an alloy including one or more of molybdenum, aluminum and titanium. For example, the multilayer structure is a multi-metal layer stack, such as a titanium, aluminum, titanium three-layer metal stack (Al / Ti / Al), etc. In practical applications, the two can be made of the same material and prepared by the same process to reduce the process steps, reduce the process difficulty, and thus save the preparation cost.

[0038] In the display substrate provided by the embodiment of the present disclosure, the first signal line 104 and the second signal line 105 are respectively arranged in any two non-adjacent sub-fan-out areas of the plurality of sub-fan-out areas, that is, the first signal line 104 and the second signal line 105 are at least separated by one sub-fan-out area, so that the distance between the first signal line 104 and the second signal line 105 is relatively large, and even when the first signal line 104 and the second signal line 105 are bent, the first signal line 104 and the second signal line 105 can still maintain a certain distance, so that the second signal line 104 and the second signal line 105 can be prevented from being connected together due to bending to cause a short circuit, thereby preventing the driving signals in the first signal line 104 and the second signal line 105 from interfering with each other to cause ghosting and other defects, thereby improving the display effect and user experience. It can also improve the yield rate of the display substrate and improve the product quality of the display substrate, thereby saving the preparation cost.

[0039] Figure 3 A schematic diagram of the structure of another display substrate provided in an embodiment of the present disclosure is shown in FIG. Figure 3 As shown, the display substrate and Figure 2 The difference of the display substrate shown is that the display substrate further includes: a first redundant structure 106 located on the substrate 101; the first redundant structure 106 is arranged in a sub-fan-out area between the sub-fan-out area where the first signal line 104 is located and the sub-fan-out area where the second signal line 105 is located.

[0040] Specifically, the material of the first redundant structure 106 can be an insulating material, and the first redundant structure 106 made of insulating material is arranged between the first signal line 104 and the second signal line 105, so that even if the first signal line 104 and the second signal line 105 are bent in their respective sub-fan-out areas and the distance between them is reduced, the first redundant structure 106 can prevent the first signal line 104 and the second signal line 105 from being connected together to cause a short circuit, thereby avoiding the interference between the driving signals in the first signal line 104 and the second signal line 105 to cause ghosting and other defects, thereby improving the display effect and user experience. It can also improve the yield rate of the display substrate and improve the product quality of the display substrate, thereby saving the preparation cost.

[0041] In some embodiments, the first signal line 104 includes: a low-level power supply voltage line VSS; the second signal line 105 includes: a gate signal test line VSR7.

[0042] In practical applications, the low-level power supply voltage line VSS can provide a low-level power supply voltage signal for the pixel unit 103 in the display area, and with the cooperation of the high-level voltage signal, the light-emitting device in the pixel unit 103 emits light to achieve the display function. The gate signal test line VSR7 provides a test signal for the gate drive circuit of the display substrate to test the gate drive circuit of the display substrate and ensure that an accurate gate signal is input into the display substrate. In the disclosed embodiment, there is at least one sub-fan-out area between the low-level power supply voltage line VSS and the gate signal test line VSR7, so that the distance between the low-level power supply voltage line VSS and the gate signal test line VSR7 is large, and a first redundant structure 106 can be set between the low-level power supply voltage line VSS and the gate signal test line VSR7, even when the low-level power supply voltage line VSS and the gate signal test line VSR7 are bent, the low-level power supply voltage line VSS and the gate signal test line VSR7 can still maintain a certain distance, so that the low-level power supply voltage line VSS and the gate signal test line VSR7 can be prevented from being connected together due to bending to cause a short circuit, thereby preventing the driving signals in the low-level power supply voltage line VSS and the gate signal test line VSR7 from interfering with each other to cause ghosting and other defects, thereby improving the display effect and user experience. And it can improve the yield rate of the display substrate and improve the product quality of the display substrate, thereby saving the preparation cost.

[0043] Figure 4 A schematic diagram of the structure of another display substrate provided in an embodiment of the present disclosure is shown in FIG. Figure 4 As shown, the display substrate and Figure 3 The difference of the display substrate shown is that the display substrate further includes: a touch signal line TP located on the substrate 101; the touch signal line TP is arranged in a sub-fan-out area between the sub-fan-out area where the low-level power supply voltage line VSS is located and the sub-fan-out area where the gate signal test line VSR7 is located.

[0044] It should be noted here that in the related art, in order to realize the touch function of the display substrate, a touch signal line TP is also arranged in the display substrate. Generally, the gate signal test line VSR7 is arranged on one side (left side) of the low-level power line VSS, and the touch signal line TP is arranged on the other side (right side) of the low-level power supply voltage line VSS. In the embodiment of the present disclosure, the touch signal line TP and the low-level power supply voltage line VSS can be interchanged so that the touch signal line TP is located between the low-level power supply voltage line VSS and the gate signal test line VSR. Even if each signal line is bent in its respective sub-fan-out area, so that the low-level power supply voltage line VSS and the touch signal line TP are connected together and short-circuited, since the low-level power supply voltage line VSS and the touch signal line TP are used for display driving and touch driving respectively, the two do not work at the same time. Even if the two are short-circuited, it will not affect the display effect. At the same time, the spacing between the low-level power supply voltage line VSS and the gate signal test line VSR7 is large, and even when the low-level power supply voltage line VSS and the gate signal test line VSR7 are bent, a certain distance can still be maintained between the low-level power supply voltage line VSS and the gate signal test line VSR7, thereby avoiding the low-level power supply voltage line VSS and the gate signal test line VSR7 from being connected together due to bending to cause a short circuit, thereby avoiding the driving signals in the low-level power supply voltage line VSS and the gate signal test line VSR7 from interfering with each other to cause ghosting and other defects, thereby improving the display effect and user experience. It can also improve the yield rate of the display substrate and improve the product quality of the display substrate, thereby saving the preparation cost.

[0045] In some embodiments, the display substrate further includes: a flexible circuit board COF and a touch display driver chip TDDI located on the base 101; the flexible circuit board COF is connected to the low-level power supply voltage line VSS and the gate signal test line VSR7; and the touch display driver chip TDDI is arranged on the flexible circuit board COF.

[0046] The touch display driver chip TDDI can be integrated on the flexible circuit board COF, and can be connected to the low-level power supply voltage line VSS and the gate signal test line VSR7 through the flexible circuit board COF. The touch display driver chip TDDI can provide a low-level power supply voltage signal for the display substrate through the low-level power supply voltage line VSS, and can provide a test signal for the display substrate through the gate signal test line VSR7. In the embodiment of the present disclosure, the spacing between the low-level power supply voltage line VSS and the gate signal test line VSR7 is large, even when the low-level power supply voltage line VSS and the gate signal test line VSR7 are bent, the low-level power supply voltage line VSS and the gate signal test line VSR7 can still maintain a certain distance, so that the low-level power supply voltage line VSS and the gate signal test line VSR7 can be avoided from being connected together due to bending to cause a short circuit, thereby avoiding the low-level power supply voltage line VSS and the gate signal test line VSR7. Drive signals in the line VSS and the gate signal test line VSR7 interfere with each other to cause ghosting and other defects, thereby improving the display effect and user experience. And it can improve the yield of the display substrate and improve the product quality of the display substrate, thereby saving the preparation cost.

[0047] In some embodiments, the display substrate further includes: a gate driving circuit (not shown in the figure); the gate driving circuit includes a plurality of cascaded shift registers (not shown in the figure); and the plurality of shift registers are connected to the gate signal test line.

[0048] Multiple shift registers can be connected to the touch display driver chip TDDI through the gate signal test line VSR7 to provide test signals for each shift register. In the disclosed embodiment, the spacing between the low-level power supply voltage line VSS and the gate signal test line VSR7 is large. Even when the low-level power supply voltage line VSS and the gate signal test line VSR7 are bent, a certain distance can still be maintained between the low-level power supply voltage line VSS and the gate signal test line VSR7. Therefore, it is possible to avoid the low-level power supply voltage line VSS and the gate signal test line VSR7 being connected together due to bending to cause a short circuit, thereby avoiding the low-level power supply voltage line VSS and the gate signal test line VSR7 from interfering with each other and causing ghosting and other defects, thereby improving the display effect and user experience. It is also possible to improve the yield of the display substrate and the product quality of the display substrate, thereby saving the preparation cost.

[0049] Figure 5 A schematic diagram of the structure of another display substrate provided in an embodiment of the present disclosure is shown in FIG. Figure 5As shown, the display substrate has a display area and a fan-out area arranged on one side of the display area, the fan-out area is divided into a plurality of sub-fan-out areas extending in the same direction, and the display substrate includes: a substrate 101, and a third signal line 107 located on the substrate; the third signal line 107 is arranged in any one of the plurality of sub-fan-out areas, and at least one sub-fan-out area adjacent to the sub-fan-out area where the third signal line 107 is located is not provided with a signal line.

[0050] In the display substrate provided by the embodiment of the present disclosure, at least one sub-fan-out area adjacent to the sub-fan-out area where the third signal line 107 is located is not provided with a signal line, and the display substrate is not provided with a gate signal test line, that is, the third signal line 107 is at least separated from other signal lines in the display substrate by one sub-fan-out area, so that the distance between the third signal line 107 and other signal lines in the display substrate is large, and even when the third signal line 107 is bent, the third signal line 107 and other signal lines can still maintain a certain distance, so that the third signal line 107 and other signal lines in the display substrate are connected together due to bending to cause a short circuit, thereby avoiding the third signal line 107 and other signal lines in the display substrate. Drive signals in the other signal lines in the display substrate interfere with each other to cause ghosting and other defects, thereby improving the display effect and user experience. It can also improve the yield rate of the display substrate and improve the product quality of the display substrate, thereby saving the preparation cost.

[0051] Figure 6 A schematic diagram of the structure of another display substrate provided in the embodiment of the present disclosure is shown in FIG. Figure 6 As shown, Figure 5 The difference of the display substrate shown is that the display substrate further includes: a second redundant structure 108 located on the substrate 101; the second redundant structure 108 is arranged in a sub-fan-out area adjacent to the sub-fan-out area where the third signal line 107 is located.

[0052] Specifically, the material of the second redundant structure 108 can be an insulating material, and the second redundant structure 108 made of insulating material is arranged in a sub-fan-out area adjacent to the sub-fan-out area where the third signal line 107 is located, so that even if the third signal line 107 is bent and the distance between the third signal line 107 and other signal lines is reduced, the second redundant structure 108 can prevent the third signal line 107 from being connected with other signal lines to cause a short circuit, thereby avoiding interference between the driving signals in the third signal line 107 and other signal lines to cause ghosting and other defects, thereby improving the display effect and user experience. It can also improve the yield rate of the display substrate and improve the product quality of the display substrate, thereby saving the preparation cost.

[0053] In some embodiments, the third signal line 107 includes a low-level power supply voltage line VSS.

[0054] In practical applications, the low-level power supply voltage line VSS can provide a low-level power supply voltage signal for the pixel unit 103 in the display area, and with the cooperation of the high-level voltage signal, the light-emitting device in the pixel unit 103 emits light to realize the display function. In the embodiment of the present disclosure, no gate signal test line is set, and the low-level power supply voltage line VSS and other signal lines are separated by at least one sub-fan-out area, so that the distance between the low-level power supply voltage line VSS and other signals is large, and a second redundant structure 108 can be set in the sub-fan-out area adjacent to the low-level power supply voltage line VSS, even when the low-level power supply voltage line VSS is bent, the low-level power supply voltage line VSS and other signals can still maintain a certain distance, so that the low-level power supply voltage line VSS and other signals can be prevented from being connected together due to bending to cause a short circuit, thereby preventing the low-level power supply voltage line VSS and other signals from interfering with each other in the driving signals in the signal and causing ghosting and other defects, thereby improving the display effect and user experience. And it can improve the yield of the display substrate and improve the product quality of the display substrate, so as to save the preparation cost.

[0055] The embodiment of the present disclosure also provides a display device, which includes a display substrate as provided in any of the above embodiments. The display device can be, for example, a mobile phone, a tablet computer, an electronic watch, a sports bracelet, a laptop computer, or other electronic device with a display function. The implementation principle and technical effects of the display device can refer to the above discussion on the implementation principle and technical effects of the display substrate, which will not be repeated here.

[0056] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A display substrate, comprising a display area and a fan-out area located on one side of the display area, wherein the fan-out area is divided into a plurality of sub-fan-out areas extending in the same direction, wherein: The display substrate comprises: a base, a first signal line and a second signal line located on the base; The first signal line and the second signal line are respectively arranged in any two non-adjacent sub-fan-out areas among the plurality of sub-fan-out areas; The display substrate further comprises: a first redundant structure located on the base; The first redundant structure is disposed in the sub-fan-out area between the sub-fan-out area where the first signal line is located and the sub-fan-out area where the second signal line is located.

2. The display substrate according to claim 1, characterized in that: The material of the first redundant structure is an insulating material.

3. The display substrate according to claim 1, characterized in that: The first signal line includes: a low-level power supply voltage line; the second signal line includes: a gate signal test line.

4. The display substrate according to claim 3, characterized in that: The display substrate further includes: a touch signal line located on the base; The touch signal line is arranged in the sub-fan-out area between the sub-fan-out area where the low-level power supply voltage line is located and the sub-fan-out area where the gate signal test line is located.

5. The display substrate according to claim 3, characterized in that: The display substrate further comprises: a flexible circuit board and a touch display driving chip located on the base; The flexible circuit board is connected to the low-level power supply voltage line and the gate signal test line; The touch display driving chip is arranged on the flexible circuit board.

6. The display substrate according to claim 5, characterized in that: The display substrate further comprises: a gate driving circuit; the gate driving circuit comprises a plurality of cascaded shift registers; The plurality of shift registers are connected to the gate signal test line.

7. A display substrate, comprising a display area and a fan-out area arranged on one side of the display area, wherein the fan-out area is divided into a plurality of sub-fan-out areas extending in the same direction, characterized in that: The display substrate comprises: a base, and a third signal line located on the base; The third signal line is arranged in any one of the plurality of sub-fan-out areas, and at least one of the sub-fan-out areas adjacent to the sub-fan-out area where the third signal line is located is not arranged with a signal line; The display substrate further comprises: a second redundant structure located on the base; The second redundant structure is disposed in the sub-fan-out area adjacent to the sub-fan-out area where the third signal line is located.

8. The display substrate according to claim 7, characterized in that: The material of the second redundant structure is an insulating material.

9. The display substrate according to claim 7, characterized in that: The third signal line includes: a low level power supply voltage line.

10. A display device, characterized in that: The display device comprises the display substrate according to any one of claims 1 to 6 or the display substrate according to any one of claims 7 to 9.

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