Display back panel and display device

Abstract

This application provides a display back panel and a display device. The display back panel includes a substrate and a plurality of light-emitting components. The light-emitting components include a first light-emitting unit and a second light-emitting unit. When one light-emitting component is in a working state, the first light-emitting unit and the second light-emitting unit emit light in a time-sharing manner when both are working normally. When either the first light-emitting unit or the second light-emitting unit malfunctions, the normally working light-emitting unit continues to emit light. The display back panel provided by this application can avoid repairing malfunctioning light-emitting units when one light-emitting component is in a working state, reducing the number of rework operations and further improving the display quality of the display back panel. It can also delay the light decay time of the display back panel and extend its service life.

Description

Technical Field

[0001] This application relates to the field of displays, and in particular to a display backplate and display device. Background Technology

[0002] Mini-LED (Mini-Light Emitting Diode) technology refers to LED technology with a light-emitting chip area of ​​100-200μm. Mini-LEDs inherit the high efficiency, high brightness, high reliability, and fast response time of inorganic LEDs, and are self-emissive, requiring no backlight. They also offer advantages such as energy saving, simple structure, small size, and thinness. They have a longer lifespan, higher brightness, better material stability, and no image burn-in. Applying them to display backplanes enables multi-zone local dimming in display devices, improving the display effect.

[0003] When Mini-LEDs are used as backlights, the decreasing size of the LED chips makes repairs difficult if dimming occurs. Furthermore, high-end Mini-LED boards contain a larger number of LEDs, increasing the total number of dimmed LEDs and the number of repairs needed, thus lengthening the repair time. Additionally, localized dimming may occur during backlight use, resulting in uneven display brightness. Currently, the repair method typically involves reworking the Mini-LED board when display abnormalities occur after the surface mount process. If a large number of dimmed LEDs are found during use, the entire board may become unusable.

[0004] Therefore, there is an urgent need for a display backplane and display device to solve the above-mentioned technical problems. Summary of the Invention

[0005] This application provides a display back panel and a display device to improve the technical problem of increased rework frequency caused by the large number of dark lamps in the light-emitting components of existing display back panels.

[0006] To solve the above problems, the technical solution provided in this application is as follows:

[0007] This application proposes a display back panel, including a substrate and a light-emitting layer disposed on the substrate. The light-emitting layer includes a plurality of light-emitting components, and each light-emitting component includes a first light-emitting unit and a second light-emitting unit.

[0008] When one of the light-emitting components is in working condition, the first light-emitting unit and the second light-emitting unit emit light in a time-sharing manner when both are working normally; when either the first light-emitting unit or the second light-emitting unit malfunctions, the light-emitting unit that is working normally emits light continuously.

[0009] In the display back panel provided in the embodiments of this application, the display back panel further includes a plurality of micro-driving units, each of the micro-driving units being electrically connected to each of the light-emitting components;

[0010] The display back panel further includes multiple first signal lines and multiple second signal lines. One end of each first signal line is electrically connected to the micro-driving unit, and the other end of each first signal line is electrically connected to the first light-emitting unit. One end of each second signal line is electrically connected to the micro-driving unit, and the other end of each second signal line is electrically connected to the second light-emitting unit. Both the first signal lines and the second signal lines are used to feed back the light-emitting state of the corresponding light-emitting unit to the micro-driving unit.

[0011] In the display back panel provided in this application embodiment, when the first light-emitting unit or the second light-emitting unit malfunctions, the first signal line sends a first fault signal to the micro-driving unit, the first light-emitting unit does not emit light, and the micro-driving unit drives the second light-emitting unit to emit light through the second signal line; or the second signal line sends a second fault signal to the micro-driving unit, the second light-emitting unit does not emit light, and the micro-driving unit drives the first light-emitting unit to emit light through the first signal line.

[0012] When the first light-emitting unit and the second light-emitting unit are working normally, the first signal line sends a first light-emitting signal to the micro-driving unit during a first time period, and the first light-emitting unit emits light. The micro-driving unit controls the second light-emitting unit to not emit light through the second signal line. During a second time period, the second signal line sends a second light-emitting signal to the micro-driving unit, and the second light-emitting unit emits light. The micro-driving unit controls the first light-emitting unit to not emit light through the first signal line.

[0013] In the display backplane provided in this application embodiment, the display backplane further includes a driving circuit layer disposed between the substrate and the light-emitting layer, the driving circuit layer including:

[0014] The first active layer is located on the substrate;

[0015] A first metal layer is located on the first active layer, and the first metal layer includes a gate.

[0016] A second metal layer is located on top of the first metal layer. The second metal layer includes a source, a drain, and power lines. The source and drain are electrically connected to the two ends of the first active layer, respectively.

[0017] The second active layer is located on the second metal layer and is electrically connected to the power line.

[0018] In the display back panel provided in the embodiments of this application, the first light-emitting unit or the second light-emitting unit includes a first contact terminal, a second contact terminal, and a third contact terminal disposed between the first contact terminal and the second contact terminal, wherein the third contact terminal is electrically connected to the first signal line or the second signal line;

[0019] The first contact terminal is electrically connected to the drain electrode, and the third contact terminal is electrically connected to the second contact terminal through the second active layer.

[0020] In the display back panel provided in this application embodiment, when the first signal line or the second signal line receives a light emission signal, the micro-driving unit drives the second active layer to conduct, and the second contact terminal is electrically connected to the power line through the second active layer, and the first light emission unit or the second light emission unit is in a light emission state.

[0021] In the display backplane provided in the embodiments of this application, a conductive layer is provided on the side surface of the substrate near the driving circuit layer. The conductive layer includes a first conductive terminal and a second conductive terminal. The first conductive terminal is electrically connected to the power line, and the second conductive terminal is electrically connected to the source electrode.

[0022] Wherein, the area of ​​the first conductive terminal in the direction perpendicular to the substrate is greater than the area of ​​the second conductive terminal in the direction perpendicular to the substrate.

[0023] In the display back panel provided in the embodiments of this application, within the same light-emitting component, the light-emitting color of the first light-emitting unit is the same as the light-emitting color of the second light-emitting unit.

[0024] In the display back panel provided in this application embodiment, when the first light-emitting unit and the second light-emitting unit are working normally, the light-emitting time of the first light-emitting unit is the same as the light-emitting time of the second light-emitting unit within a time period.

[0025] This application also proposes a display device including a display back panel as described in any of the preceding claims.

[0026] Beneficial Effects: This application provides a display back panel and a display device; the display back panel includes a substrate and a light-emitting layer disposed on the substrate, the light-emitting layer includes a plurality of light-emitting components, each of the light-emitting components including a first light-emitting unit and a second light-emitting unit, wherein, when one of the light-emitting components is in a working state, when the first light-emitting unit and the second light-emitting unit are working normally, the first light-emitting unit and the second light-emitting unit emit light in a time-sharing manner; when the first light-emitting unit or the second light-emitting unit malfunctions, the normally working light-emitting unit of the first light-emitting unit and the second light-emitting unit emits light continuously; the display back panel provided by this application, by setting the first light-emitting unit in each of the light-emitting components... The light unit and the light-emitting unit corresponding to the first light-emitting unit are configured such that when one of the light-emitting components is in working condition, if the first light-emitting unit or the second light-emitting unit malfunctions, the normally functioning light-emitting unit of the first light-emitting unit and the second light-emitting unit continues to emit light, thereby avoiding the need to repair the malfunctioning light-emitting unit, reducing the number of rework operations for the light-emitting component, and further improving the display quality of the display back panel; at the same time, when the first light-emitting unit and the second light-emitting unit are working normally, the first light-emitting unit and the second light-emitting unit emit light in a time-sharing manner, which can delay the light decay time of the display back panel and improve the service life of the display back panel. Attached Figure Description

[0027] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0028] Figure 1 A planar schematic diagram of the micro-driving unit and light-emitting component in the display backplane provided in an embodiment of this application;

[0029] Figure 2 for Figure 1 The image shows a cross-sectional view of the back panel at point AA. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] Because the number of dark LEDs in the existing display back panel is relatively large, the number of times the display back panel needs to be repaired increases. This application proposes the following technical solutions to solve the above-mentioned technical problems.

[0032] Please see Figures 1 to 2This application proposes a display back panel, including a substrate 100 and a light-emitting layer disposed on the substrate 100. The light-emitting layer includes a plurality of light-emitting components 300, and each light-emitting component 300 includes a first light-emitting unit 31 and a second light-emitting unit 32.

[0033] When one of the light-emitting components 300 is in working state, when the first light-emitting unit 31 and the second light-emitting unit 32 are working normally, the first light-emitting unit 31 and the second light-emitting unit 32 emit light in a time-sharing manner; when the first light-emitting unit 31 or the second light-emitting unit 32 is malfunctioning, the light-emitting unit that is working normally in the first light-emitting unit 31 and the second light-emitting unit 32 continues to emit light.

[0034] The display back panel provided in this application provides a first light-emitting unit 31 and a corresponding light-emitting unit within each of the light-emitting components 300. This ensures that when one of the light-emitting components 300 is in operation, if either the first light-emitting unit 31 or the second light-emitting unit 32 malfunctions, the normally functioning light-emitting unit in the first light-emitting unit 31 and the second light-emitting unit 32 continues to emit light. This avoids the need to repair the malfunctioning light-emitting unit, reduces the number of rework operations on the light-emitting component 300, and further improves the display quality of the display back panel. Simultaneously, when the first light-emitting unit 31 and the second light-emitting unit 32 are functioning normally, they emit light in a time-sharing manner, which can delay the light decay time of the display back panel and extend its service life.

[0035] The technical solution of this application will now be described in conjunction with specific embodiments.

[0036] Please see Figure 1 , Figure 1 This is a planar schematic diagram of the micro-driving unit 30 and the light-emitting component 300 in the display back panel provided in the embodiment of this application; wherein, the display back panel includes a substrate 100 and a light-emitting layer disposed on the substrate 100, the light-emitting layer includes a plurality of light-emitting components 300, and each light-emitting component 300 includes a first light-emitting unit 31 and a second light-emitting unit 32.

[0037] When one of the light-emitting components 300 is in working state, when the first light-emitting unit 31 and the second light-emitting unit 32 are working normally, the first light-emitting unit 31 and the second light-emitting unit 32 emit light in a time-sharing manner; when the first light-emitting unit 31 or the second light-emitting unit 32 is malfunctioning, the light-emitting unit that is working normally in the first light-emitting unit 31 and the second light-emitting unit 32 continues to emit light.

[0038] In this embodiment of the application, the display back panel further includes a plurality of micro-driving units 30, each of the micro-driving units 30 being electrically connected to each of the light-emitting components 300;

[0039] The display back panel further includes multiple first signal lines 304 and multiple second signal lines 305. One end of each first signal line 304 is electrically connected to the micro-driving unit 30, and the other end of each first signal line 304 is electrically connected to the first light-emitting unit 31. One end of each second signal line 305 is electrically connected to the micro-driving unit 30, and the other end of each second signal line 305 is electrically connected to the second light-emitting unit 32. Both the first signal lines 304 and the second signal lines 305 are used to feed back the light-emitting state of the corresponding light-emitting unit to the micro-driving unit 30.

[0040] Furthermore, when the first light-emitting unit 31 or the second light-emitting unit 32 malfunctions, the first signal line 304 sends a first fault signal to the micro-driving unit 30, the first light-emitting unit 31 does not emit light, and the micro-driving unit 30 drives the second light-emitting unit 32 to emit light through the second signal line 305; when the second signal line 305 sends a second fault signal to the micro-driving unit 30, the second light-emitting unit 32 does not emit light, and the micro-driving unit 30 drives the first light-emitting unit 31 to emit light through the first signal line 304; when the first light-emitting unit 31 and the second light-emitting unit 32 are working normally, the first signal line 304 sends a first light-emitting signal to the micro-driving unit 30 during a first time period, the first light-emitting unit 31 emits light, and the micro-driving unit 30 controls the second light-emitting unit 32 to not emit light through the second signal line 305; the second signal line 305 sends a second light-emitting signal to the micro-driving unit 30 during a second time period, the second light-emitting unit 32 emits light, and the micro-driving unit 30 controls the first light-emitting unit 31 to not emit light through the first signal line 304.

[0041] Specifically, when the first light-emitting unit 31 and the second light-emitting unit 32 are working normally, within a time period, the light-emitting time of the first light-emitting unit 31 is the same as the light-emitting time of the second light-emitting unit 32.

[0042] In this embodiment, the first light-emitting unit 31 or the second light-emitting unit 32 includes a first contact terminal 301 and a second contact terminal 302. The micro-driving unit 30 is also electrically connected to the first contact terminal 301 through a first electrode line 306, and the micro-driving unit 30 is also electrically connected to the first contact terminal 301 through a second electrode line 307.

[0043] In this embodiment, both the first light-emitting unit 31 and the second light-emitting unit 32 are mini-LED chips; wherein, a mini-LED chip refers to an LED chip with a size between 50 and 200 μm. The first light-emitting unit 31 and the second light-emitting unit 32 can be used as a backlight for a display device, or as a self-emissive layer for a display device.

[0044] like Figure 2 As shown, Figure 1 The image shows a cross-sectional view of the display back panel at point AA. The display back panel includes multiple pixel islands 10, each pixel island 10 including a substrate 100 and a driving circuit layer 200. The substrate 100 includes a first via 101. The driving circuit layer 200 is located on the substrate 100 and includes at least a connection electrode 201 corresponding to the first via 101. The display back panel also includes connecting wires 20 located on the side of the substrate 100 away from the driving circuit layer 200. The connecting electrodes 201 of two adjacent pixel islands 10 are electrically connected to the two ends of the connecting wires 20 through corresponding first vias 101.

[0045] In one embodiment, the driving circuit layer 200 includes a first active layer 202, a first metal layer 203, a second metal layer 204, and a second active layer 209; the first active layer 202 is located on the substrate 100; the first metal layer 203 is located on the first active layer 202 and includes a gate 2031; the second metal layer 204 is located on the first metal layer 203 and includes a source 2041, a drain 2042, and a power line 2043, wherein the source 2041 and the drain 2042 are electrically connected to the two ends of the first active layer 202, and the second active layer 209 is located on the second metal layer 204 and is electrically connected to the power line 2043;

[0046] The substrate 100 is provided with a second through hole 102 and a third through hole 103. The source electrode 2041 is electrically connected to the connecting wire 20 through the second through hole 102, and the power line 2043 is electrically connected to the connecting wire 20 through the third through hole 103.

[0047] In this embodiment, the first active layer 202 and the second active layer 209 are both made of polycrystalline silicon. The first contact terminal 301 is electrically connected to the N-type semiconductor inside the light-emitting unit, and the second contact terminal 302 is electrically connected to the P-type semiconductor inside the light-emitting unit.

[0048] It is understood that in this embodiment, by providing a second through hole 102 and a third through hole 103 on the substrate 100, the source electrode 2041 and the power line 2043 can be electrically connected to the connecting wire 20 through the second through hole 102 and the third through hole 103, respectively. The electrical signal is transmitted to the source electrode 2041 and the power line 2043 through the connecting wire 20. In other words, the connecting wire 20 with better ductility can be used to supply power to the display back panel from the bottom of the pixel island 10.

[0049] In one embodiment, each pixel island 10 is provided with a first light-emitting unit 31 or a second light-emitting unit 32. The first light-emitting unit 31 or the second light-emitting unit 32 is located on the driving circuit layer 200. The first light-emitting unit 31 or the second light-emitting unit 32 includes a first contact terminal 301, a second contact terminal 302, and a third contact terminal 303 located between the first contact terminal 301 and the second contact terminal 302. The third contact terminal 303 is electrically connected to the first signal line 304 or the second signal line 305. The first contact terminal 301 is electrically connected to the drain 2042, and the third contact terminal 303 is electrically connected to the second contact terminal 302 through the second active layer 209.

[0050] It should be noted that within the same light-emitting component 300, the light-emitting color of the first light-emitting unit 31 is the same as the light-emitting color of the second light-emitting unit 32; that is, a pixel island 10 may contain any one of red sub-pixels, blue sub-pixels, green sub-pixels and white sub-pixels, that is, a pixel island 10 may be provided with any one of red light-emitting device, green light-emitting device, blue light-emitting device and white light-emitting device.

[0051] When the first signal line 304 or the second signal line 305 receives a light-emitting signal, the micro-driving unit 30 transmits a current signal to the third contact terminal 303 through the first signal line 304 or the second signal line 305. The third contact terminal 303 then transmits the current signal to the second active layer 209, at which point the second active layer 209 is turned on. The second contact terminal 302 is electrically connected to the power line 2043 through the second active layer 209, and the first light-emitting unit 31 or the second light-emitting unit 32 is in a light-emitting state. By controlling the application of different voltages to the first contact terminal 301 and the second contact terminal 302, the light-emitting brightness of the first light-emitting unit 31 or the second light-emitting unit 32 can be controlled.

[0052] In one embodiment, the connecting electrode 201 is disposed on the same layer as the second metal layer 204. It should be noted that the connecting electrode 201 is used to connect two adjacent pixel islands 10, that is, to transmit electrical signals between two adjacent pixel islands 10. In this embodiment, by disposing the connecting electrode 201 and the second metal layer 204 on the same layer, the connecting electrode 201 and the second metal layer 204 can be fabricated using the same process, eliminating the need for an additional photomask process and preventing an increase in production costs.

[0053] In one embodiment, a conductive layer 400 is disposed on the side surface of the substrate 100 near the driving circuit layer 200. The conductive layer 400 includes a plurality of first conductive terminals 401, a plurality of second conductive terminals 402, and a plurality of third conductive terminals 403. The first conductive terminals 401 are disposed corresponding to the first through-hole 101, the second conductive terminals 402 are disposed corresponding to the second through-hole 102, and the third conductive terminals 403 are disposed corresponding to the third through-hole 103.

[0054] It is understood that the connecting electrode 201, source electrode 2041, and power line 2043 are all connected to the surface of the substrate 100 through vias. However, the via diameter is small, resulting in a small contact area between the connecting electrode 201, source electrode 2041, and power line 2043 and the connecting wire 20, leading to a large contact resistance. In this embodiment, multiple first conductive terminals 401, multiple second conductive terminals 402, and multiple third conductive terminals 403 are provided on the surface of the substrate 100 near the driving circuit layer 200. The connecting electrode 201, source electrode 2041, and power line 2043 are electrically connected to the connecting wire 20 through these conductive terminals, thereby reducing contact resistance and voltage drop.

[0055] Furthermore, in one embodiment, the area of ​​the first conductive terminal 401 in the direction perpendicular to the substrate 100 is larger than the area of ​​the second conductive terminal 402 in the same direction. This is because, since the power line 2043 electrically connects the second contact terminal 302 and the third contact terminal 303 respectively, the contact impedance between the first conductive terminal 401 and the connecting wire 20 is greater than the contact impedance between the second conductive terminal 402 and the connecting wire 20. Therefore, increasing the area of ​​the first conductive terminal 401 in the direction perpendicular to the substrate 100 reduces the contact impedance and decreases the voltage drop.

[0056] In one embodiment, the first through hole 101, the second through hole 102, and the third through hole 103 are filled with conductive material 500. It is understood that this embodiment improves the conductivity between the connecting electrode 201, the source electrode 2041, and the power line 2043 and the connecting wire 20 by filling the first through hole 101, the second through hole 102, and the third through hole 103 with conductive material 500.

[0057] In one embodiment, the display backplane further includes a buffer layer 600, a passivation layer 700, a third metal layer 800, and an insulating layer 900. The buffer layer 600 is located between the substrate 100 and the driving circuit layer 200. The passivation layer 700 is located on the second metal layer 204. The third metal layer 800 is located on the passivation layer 700. The insulating layer 900 is located between the third metal layer 800 and the first light-emitting unit 31 or the second light-emitting unit 32. The third metal layer 800 includes a plurality of first conductive electrodes 801, a plurality of second conductive electrodes 802, and a plurality of third conductive electrodes 803. The first contact terminal 301 of the first light-emitting unit 31 or the second light-emitting unit 32 is electrically connected to the drain electrode 2042 through the first conductive electrode 801. The second active layer 209 is electrically connected to the power line 2043 through the third conductive electrode 803. The third contact terminal 303 of the first light-emitting unit 31 or the second light-emitting unit 32 is electrically connected to the second active layer 209 through the second conductive electrode 802.

[0058] In one embodiment, the driving circuit layer 200 further includes a first gate insulating layer 205, a second gate insulating layer 206, a second gate layer 207, and an interlayer insulating layer 208. The first gate insulating layer 205 is located between the first active layer 202 and the first metal layer 203. The second gate insulating layer 206 is located on the first metal layer 203. The second gate layer 207 is located on the second gate insulating layer 206. The interlayer insulating layer 208 is located on the second gate layer 207. The second metal layer 204 is located between the interlayer insulating layer 208 and the passivation layer 700. The second active layer 209 is located on the passivation layer 700.

[0059] This application proposes a backup mini-LED design scheme. When one LED fails, its corresponding backup LED is seamlessly activated without affecting usage. Furthermore, if an LED dims after surface mounting, but its backup LED remains lit, the dimmed LED does not require repair. If both the main and backup LEDs are lit, they can be programmed to remain lit for a certain period (100 or 200 hours depending on user needs) before automatically activating the other set of backup LEDs. This allows the two sets of LEDs to be used alternately, extending the overall lifespan of the display backplane.

[0060] Since the probability of two LEDs failing simultaneously in surface mount technology (SMT) is relatively low, setting up a backup LED allows for skipping repairs if more than one set of LEDs fails during production, reducing the number of repairs and improving first-pass yield. Because mini-LEDs are prone to dimming during reliability testing after rework, high-end customers require LED boards with no reworkable LEDs. This method improves the first-pass yield and reliability of the LED board, meeting the requirements of high-end customers. Furthermore, if an LED fails during use, the backup LED can be activated immediately, reducing the risk of damage to the LED board due to excessive dimming LEDs.

[0061] If both sets of LEDs function normally, the micro-drive unit 30 controls them to alternate, extending their lifespan. For example, after a set period (the time can be determined by the user, such as 100 or 200 hours), the other set of LEDs can be activated, simultaneously slowing down light decay and ensuring stable brightness during product use, thus reducing power consumption. Typically, light decay occurs within 3 years, and mini-LED products have a 3-year warranty. Using this method can extend the product lifespan to 6 years, reducing after-sales issues related to replacements within the warranty period.

[0062] The above embodiments of this application utilize the functions of spare LED chips for repair and automatic switching between two sets of LED chips, and can have the following advantages:

[0063] First, it can reduce the number of returns for high-end display back panels and improve the first-pass yield and reliability of display back panels;

[0064] Secondly, it can improve the lifespan of the display back panel;

[0065] Third, it can delay the light decay time. When a set of LEDs has been used for a period of time and light decay occurs, another set of backup LEDs can be turned on to maintain the previous brightness level.

[0066] Fourth, it can reduce customer complaints caused by local dimming of the display back panel during use, and reduce after-sales service for replacement parts during the product warranty period.

[0067] To address the technical problem of increased rework frequency of existing display back panels due to the large number of dark LEDs in the light-emitting components 300, this application proposes a display back panel including a substrate 100 and a light-emitting layer disposed on the substrate 100. The light-emitting layer includes multiple light-emitting components 300, each of which includes a first light-emitting unit 31 and a second light-emitting unit 32. When one light-emitting component 300 is in operation, the first light-emitting unit 31 and the second light-emitting unit 32 emit light in a time-sharing manner when both are working normally. When either the first light-emitting unit 31 or the second light-emitting unit 32 malfunctions, the normally functioning light-emitting unit among the first and second light-emitting units 31 and 32 continues to emit light. The display back panel provided by this application achieves this through… Each of the light-emitting components 300 is provided with a first light-emitting unit 31 and a light-emitting unit corresponding to the first light-emitting unit 31. This ensures that when one of the light-emitting components 300 is in working condition, if either the first light-emitting unit 31 or the second light-emitting unit 32 malfunctions, the normally functioning light-emitting unit of the first light-emitting unit 31 or the second light-emitting unit 32 continues to emit light. This avoids the need to repair the malfunctioning light-emitting unit, reduces the number of rework operations on the light-emitting component 300, and further improves the display quality of the display back panel. At the same time, when the first light-emitting unit 31 and the second light-emitting unit 32 are functioning normally, they emit light in a time-sharing manner, which can delay the light decay time of the display back panel and extend its service life.

[0068] Accordingly, this application also proposes a display device, which includes a display body and the aforementioned display back panel, wherein the display body and the display device are integrated into one unit. The display device may include, but is not limited to, mobile phones, tablet computers, computer monitors, game consoles, televisions, display screens, wearable devices, and other household appliances or home appliances with display functions.

[0069] It should be noted that, Figure 1 , Figure 2 Only the main structure of the display backplane is shown in the figure. The module chips, flexible circuit boards, polarizers, protective films and other films included in the final form of the display device are not shown. However, the final form of the display terminal may include such films. Such films can be made in the manufacturing process of the display backplane provided in the embodiments of the present invention or after the manufacturing process is completed. They will not be described in detail here.

[0070] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0071] The above provides a detailed description of a display back panel and display device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A display backplane, characterized in that, Comprising: A substrate; A driving circuit layer disposed on the substrate, the driving circuit layer comprising: a first active layer on the substrate, a first metal layer on the first active layer, a second metal layer on the first metal layer, and a second active layer on the second metal layer. The first metal layer comprises a gate, the second metal layer comprises a source electrode, a drain electrode, and a power supply line. The source electrode and the drain electrode are respectively electrically connected to two ends of the first active layer, and the second active layer is electrically connected to the power supply line; A light-emitting layer disposed on the driving circuit layer, the light-emitting layer comprising a plurality of light-emitting components, and each light-emitting component comprises a first light-emitting unit and a second light-emitting unit; Wherein, when one of the light-emitting components is in a working state, when the first light-emitting unit and the second light-emitting unit work normally, the first light-emitting unit and the second light-emitting unit emit light at different times; when the first light-emitting unit or the second light-emitting unit works abnormally, the normally working light-emitting unit in the first light-emitting unit and the second light-emitting unit continuously emits light; the display backplane comprises a plurality of pixel islands, the first light-emitting unit and the second light-emitting unit in the same light-emitting component are respectively located on different pixel islands, the display backplane further comprises a plurality of micro-driving units, a plurality of first signal lines, and a plurality of second signal lines. Each micro-driving unit is electrically connected to each light-emitting component correspondingly, one end of each first signal line is electrically connected to the micro-driving unit, and the other end of each first signal line is electrically connected to the first light-emitting unit; one end of each second signal line is electrically connected to the micro-driving unit, and the other end of each second signal line is electrically connected to the second light-emitting unit; the first signal line and the second signal line are both used to feed back the light-emitting state of the corresponding light-emitting unit to the micro-driving unit; wherein, the first light-emitting unit or the second light-emitting unit comprises a first contact terminal, a second contact terminal, and a third contact terminal disposed between the first contact terminal and the second contact terminal, and the third contact terminal is electrically connected to the first signal line or the second signal line; wherein, the first contact terminal is electrically connected to the drain electrode, and the third contact terminal is electrically connected to the second contact terminal through the second active layer.

2. The display backplane according to claim 1, wherein When the first light-emitting unit or the second light-emitting unit works abnormally, the first signal line sends a first fault signal to the micro-driving unit, the first light-emitting unit does not emit light, and the micro-driving unit drives the second light-emitting unit to emit light through the second signal line; Or the second signal line sends a second fault signal to the micro-driving unit, the second light-emitting unit does not emit light, and the micro-driving unit drives the first light-emitting unit to emit light through the first signal line; When the first light-emitting unit and the second light-emitting unit are operating normally, the first signal line transmits a first light-emitting signal to the micro-driving unit within a first time period, the first light-emitting unit emits light, and the micro-driving unit controls the second light-emitting unit not to emit light through the second signal line; the second signal line transmits a second light-emitting signal to the micro-driving unit within a second time period, the second light-emitting unit emits light, and the micro-driving unit controls the first light-emitting unit not to emit light through the first signal line.

3. The display backplane according to claim 1, wherein When the first signal line or the second signal line receives a light-emitting signal, the micro-driving unit drives the second active layer to conduct, and the second contact terminal is electrically connected to the power supply line through the second active layer, and the first light-emitting unit or the second light-emitting unit is in a light-emitting state.

4. The display backplane according to claim 1, wherein A conductive layer is provided on a surface of the substrate close to the driving circuit layer. The conductive layer includes a first conductive terminal and a second conductive terminal. The first conductive terminal is electrically connected to the power supply line, and the second conductive terminal is electrically connected to the source electrode. Wherein, the area of the first conductive terminal in the direction perpendicular to the substrate is larger than the area of the second conductive terminal in the direction perpendicular to the substrate.

5. The display backplane according to claim 1, wherein Within the same light-emitting component, the light-emitting color of the first light-emitting unit is the same as the light-emitting color of the second light-emitting unit.

6. The display backplane according to claim 1, wherein When the first light-emitting unit and the second light-emitting unit are operating normally, within one time period, the light-emitting time of the first light-emitting unit is the same as the light-emitting time of the second light-emitting unit.

7. A display device, characterized in that, It includes a display backplane according to any one of claims 1 to 6.

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