Light-emitting module and display device

Abstract

Provided are a light-emitting module and a display device. The light-emitting module comprises a light-emitting substrate (100), a conductive connection portion (70), and a ground signal providing structure (80); the light-emitting substrate (100) comprises a light-emitting area (110) and a frame area (120) located on at least one side of the light-emitting area (110); the light-emitting substrate (100) comprises a base (10) and a plurality of signal lines located on one side of the substrate (10), the plurality of signal lines including a first signal line (50) and a plurality of second signal lines (GNDL); the first signal line (50) is located in the frame area (120), the plurality of second signal lines (GNDL) extend to the light-emitting area (110), and at least some of the second signal lines (GNDL) are connected to the first signal line (50); and two ends of the conductive connection portion (70) are electrically connected to the first signal line (50) and the ground signal providing structure (80), respectively.

Description

Light-emitting module and display device Technical Field

[0001] The present application relates to the field of display technology, and in particular to a light-emitting module and a display device. Background Art

[0002] Mini-LED, also known as submillimeter light-emitting diodes, is a new type of LED display technology derived from fine-pitch LEDs. Its crystal size ranges from approximately 50μm to 300μm, placing it somewhere between traditional LEDs and Micro LEDs. Mini-LEDs are gaining popularity in the display industry due to their superior display quality, lightweight design, high contrast, and long lifespan.

[0003] Summary of the Invention

[0004] The present application provides a light-emitting module and a display device.

[0005] A first aspect of an embodiment of the present application provides a light-emitting module, the light-emitting module comprising a light-emitting substrate, a conductive connection portion, and a ground signal providing structure;

[0006] The light-emitting substrate includes a light-emitting area and a border area located on at least one side of the light-emitting area; the light-emitting substrate includes a substrate and a plurality of signal lines located on one side of the substrate, the plurality of signal lines including a first signal line and a plurality of second signal lines; the first signal line is located in the border area, the plurality of second signal lines extend to the light-emitting area, and at least part of the second signal lines is connected to the first signal line; the two ends of the conductive connection portion are respectively electrically connected to the first signal line and the ground signal providing structure.

[0007] In one embodiment, the border area includes a first sub-border area and a second sub-border area located on opposite sides of the light-emitting area, the first signal line is located in the first sub-border area, the second sub-border area includes a binding area, and the binding area is provided with a binding terminal; the second signal line extends in a direction from the first sub-border area to the second sub-border area.

[0008] In one embodiment, the conductive connection portion is a flexible conductive connection portion.

[0009] In one embodiment, the light-emitting substrate further comprises an insulating layer located on a side of the first signal line away from the substrate, the insulating layer having a hollow portion exposing at least a portion of the surface of the first signal line, and the conductive connection portion is overlapped with the first signal line through the hollow portion.

[0010] In one embodiment, the first signal line includes a main signal segment and a protrusion located on a side of the main signal segment away from the light-emitting area. The protrusion and the main signal segment are an integrated structure, and the conductive connection portion is connected to the protrusion.

[0011] In one embodiment, the first signal line is provided with a plurality of protrusions, and the protrusions are arranged at intervals in the extension direction of the main signal segment; the width of the protrusions in the extension direction of the main signal segment satisfies the following relationship:

[0012] Wherein, d1 is the width of the protrusion in the extension direction of the main signal segment, n is the total number of the second signal lines connected to the first signal line, m is the total number of the protrusions, and d2 is the width of the second signal line in the extension direction of the main signal segment.

[0013] In one embodiment, the first signal line is provided with N protrusions, and the second signal lines connected to the first signal line are divided into N signal line groups, each of the signal line groups includes a plurality of adjacent second signal lines; each of the signal line groups corresponds to one protrusion; in the extension direction of the main signal segment, the distances between the two second signal lines with the largest distance between them in the same signal line group and the corresponding protrusions are substantially the same.

[0014] In one embodiment, the light-emitting substrate includes a plurality of light-emitting units located on one side of the substrate, and the plurality of light-emitting units and the first signal line are located on the same side of the substrate;

[0015] The second signal line extends along a first direction, and the multiple light-emitting units are arranged into multiple columns along a second direction intersecting the first direction, each of the second signal lines is connected to a column of light-emitting units; each column of light-emitting units is connected to multiple signal lines; among the signal lines connected to the same column of light-emitting units, the second signal line is located on the same side as other signal lines.

[0016] In one embodiment, the multiple signal lines connected to the same column of light-emitting units include the second signal line, the driving voltage signal line, the site selection signal line, the power signal line and the feedback signal line; among the signal lines connected to the same column of light-emitting units, the power signal line, the site selection signal line, the driving voltage signal line and the feedback signal line are arranged in sequence in a direction perpendicular to the extension direction of the second signal line and in a direction away from the second signal line.

[0017] In one embodiment, each of the second signal lines of the light-emitting substrate is connected to the first signal line respectively.

[0018] In one embodiment, the frame area includes a first sub-frame area and a second sub-frame area located on opposite sides of the light-emitting area, the second signal line extends along a first direction, and the first sub-frame area and the second sub-frame area extend along a second direction intersecting the first direction; the second sub-frame area includes a fan-out area and a binding area located on a side of the fan-out area away from the light-emitting area, the light-emitting substrate also includes a plurality of binding terminals located in the binding area and a plurality of fan-out lines located in the fan-out area, the plurality of fan-out lines include a first fan-out line and a second fan-out line; the two ends of the first fan-out line are respectively connected to the second signal line and the binding terminals; the first fan-out line includes a first segment extending along the second direction, the second fan-out line includes a second segment extending along the second direction, and the orthographic projection of the first segment on a plane perpendicular to the first direction does not overlap with the orthographic projection of the second segment on the plane.

[0019] In one embodiment, the border area includes a first sub-border area, a second sub-border area, a third sub-border area and a fourth sub-border area, the first sub-border area is arranged opposite to the second sub-border area, the third sub-border area is arranged opposite to the fourth sub-border area and the extension direction is the same as the extension direction of the second signal line; the first signal line is located in the first sub-border area; the width of the second signal line adjacent to the third sub-border area and the width of the second signal line adjacent to the fourth sub-border area are respectively smaller than the width of the second signal line located therebetween; the second signal line adjacent to the third sub-border area is connected to the first signal line; and / or, the second signal line adjacent to the fourth sub-border area is connected to the first signal line.

[0020] In one embodiment, the ground signal providing structure includes a metal ground layer located on a side of the substrate of the light emitting substrate away from the first signal line, or the ground signal providing structure is a middle frame located on a side of the light emitting substrate.

[0021] In one embodiment, the border area includes a first sub-border area and a second sub-border area located on opposite sides of the light-emitting area, the light-emitting substrate also includes a driving voltage signal line located in the light-emitting area, the second signal line and the driving voltage signal line extend along a first direction respectively, and the first sub-border area and the second sub-border area extend along a second direction intersecting with the first direction; the second sub-border area includes a fan-out area and a binding area located on a side of the fan-out area away from the light-emitting area, the light-emitting substrate also includes a plurality of binding terminals located in the binding area and a second fan-out line located in the fan-out area, the driving voltage signal line is connected to the binding terminal through the second fan-out line; the second fan-out line includes a second segment extending along the second direction, and the width of the second segment of the second fan-out line connected to the driving voltage signal line is greater than or equal to the width of the driving voltage signal line.

[0022] In one embodiment, the first signal line includes a plurality of signal segments, the plurality of signal segments are arranged at intervals in the extension direction of the signal segments, and each of the signal segments is connected to at least one second signal line; or the first signal line is an integrated structure.

[0023] A second aspect of the embodiments of the present application provides a display device, which includes the light-emitting module according to the above.

[0024] The light-emitting module and display device provided in the embodiments of the present application are such that at least part of the second signal lines of the light-emitting substrate are connected to the first signal lines, and the first signal lines are electrically connected to the ground signal providing structure through a conductive connection portion. The ground signal providing structure can provide a ground signal to the second signal lines. This part of the second signal lines does not need to be connected to the binding terminals of the binding area through fan-out lines, which can save wiring space in the fan-out area, thereby avoiding the problem of a high temperature rise and a large voltage drop of the fan-out lines due to the small width of the fan-out lines used to connect the second signal lines to the binding terminals. Since the second signal lines do not need to be connected to the binding terminals of the binding area through fan-out lines, which saves wiring space in the fan-out area, the width of the fan-out lines used to connect other signal lines to the binding terminals can be set to be larger, which helps to reduce the temperature rise of this part of the fan-out lines, thereby avoiding the high temperature of local areas of the light-emitting substrate affecting the light efficiency of the light-emitting substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic structural diagram of a light-emitting substrate of a light-emitting module provided by an exemplary embodiment of the present application;

[0026] FIG2 is a cross-sectional view of a light-emitting module provided by an exemplary embodiment of the present application;

[0027] FIG3 is a cross-sectional view of a light-emitting module provided by another exemplary embodiment of the present application;

[0028] FIG4 is a schematic diagram of a partial structure of a light-emitting substrate of a light-emitting module provided by an exemplary embodiment of the present application;

[0029] FIG5 is a schematic diagram of local wiring of a light-emitting substrate provided by an exemplary embodiment of the present application;

[0030] FIG6 is a partial cross-sectional view of a light-emitting substrate provided by an exemplary embodiment of the present application;

[0031] FIG7 is a schematic diagram of local wiring of a light-emitting substrate provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0032] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0033] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. As used in this application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0034] It should be understood that although the terms first, second, third, etc. may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0035] The embodiments of the present application provide a light-emitting module and a display device. The light-emitting module and the display device in the embodiments of the present application are described in detail below in conjunction with the accompanying drawings. The features of the following embodiments may complement or be combined with each other unless they conflict.

[0036] The present invention provides a light-emitting module. As shown in FIG1 , the light-emitting module includes a light-emitting substrate 100, which includes a light-emitting area 110 and a border area 120 located on at least one side of the light-emitting area 110. The light-emitting substrate 100 also includes a substrate 10 and a plurality of signal lines located on one side of the substrate 10. The plurality of signal lines includes a first signal line 50 and a plurality of second signal lines GNDL. The first signal line 50 is located in the border area 120. The plurality of second signal lines GNDL extend to the light-emitting area 110, and at least some of the second signal lines GNDL are connected to the first signal lines 50.

[0037] As shown in Figure 2, the light-emitting module further includes a conductive connection portion 70 and a ground signal providing structure 80. The ends of the conductive connection portion 70 are electrically connected to the first signal line 50 and the ground signal providing structure 80, respectively. The second signal line GNDL is also a ground signal line. The second signal line GNDL, which is connected to the first signal line 50, is not connected to the binding terminal via a fan-out line.

[0038] In the light-emitting module provided by the embodiment of the present application, since at least part of the second signal lines of the light-emitting substrate are connected to the first signal lines, and the first signal lines are electrically connected to the ground signal providing structure through the conductive connection part, the ground signal providing structure can provide a ground signal to the second signal line. This part of the second signal line does not need to be connected to the binding terminal of the binding area through the fan-out line, which can save the wiring space of the fan-out area, thereby avoiding the problem of high temperature rise and large voltage drop of the fan-out line due to the small width of the fan-out line used to connect the second signal line to the binding terminal; since the second signal line does not need to be connected to the binding terminal of the binding area through the fan-out line, the wiring space of the fan-out area is saved, and the width of the fan-out line used to connect other signal lines to the binding terminal can be set to be larger, which helps to reduce the temperature rise and voltage drop of this part of the fan-out line, thereby avoiding the high temperature of the local area of ​​the light-emitting substrate affecting the light efficiency of the light-emitting substrate; compared with the solution of improving the temperature rise and voltage drop of the fan-out line by increasing the thickness of the fan-out line, the process difficulty can be simplified and the process cost can be reduced.

[0039] In one embodiment, as shown in FIG1 , the frame area 120 surrounds the light-emitting area 110, and the frame area 120 includes a first sub-frame area 121, a second sub-frame area 122, a third sub-frame area 123, and a fourth sub-frame area 124. The first sub-frame area 121 and the second sub-frame area 122 extend along the second direction D2 and are arranged opposite to each other; the third sub-frame area 123 and the fourth sub-frame area 124 extend along the first direction D1 and are arranged opposite to each other. In some embodiments, the first sub-frame area 121 is the upper frame of the display substrate, the second sub-frame area 122 is the lower frame of the display substrate, the third sub-frame area 123 is the left frame of the display substrate, and the fourth sub-frame area 124 is the right frame of the display substrate. The upper side, lower side, left side, and right side are determined by the orientation of the frames of the light-emitting substrate when the user is using the light-emitting substrate. For example, the frame of the light-emitting substrate used to bind the circuit board is the lower frame of the light-emitting substrate, and the upper side is the opposite side of the lower side.

[0040] In one embodiment, the first direction D1 and the second direction D2 are perpendicular to each other. For example, the first direction D1 is the column direction, and the second direction D2 is the row direction. The first sub-border area 121 and the second sub-border area 122 extend along the second direction D2, with the direction from the first sub-border area 121 to the second sub-border area 122 being the first direction D1. The third sub-border area 123 and the fourth sub-border area 124 extend along the first direction D1, with the direction from the third sub-border area 123 to the fourth sub-border area 124 being the second direction D2.

[0041] In one embodiment, as shown in Figures 1 and 4, the first signal line 50 is located in the first sub-border area 121, the second sub-border area 122 includes a binding area 1221, and the binding area 1221 is provided with a plurality of binding terminals. The second signal line GNDL extends from the first sub-border area 121 to the second sub-border area 122, that is, in a first direction D1. In this embodiment of the present application, by connecting at least the second signal line GNDL to the first signal line 50, this portion of the second signal line GNDL does not need to be connected to the binding terminals of the binding area 1221, thereby saving the number of binding terminals and thus reducing the number of binding areas 1221.

[0042] In one embodiment, as shown in Figure 1, the light-emitting substrate 100 includes a plurality of light-emitting units 102 located on one side of the substrate 10, and the plurality of light-emitting units 102, the first signal line 50 and the second signal line GNDL are located on the same side of the substrate 10; the light-emitting unit 102 is located in the light-emitting area 110, and includes a driving circuit 103 and at least one light-emitting element 104 connected to the driving circuit 103.

[0043] In one embodiment, the light-emitting element 104 may include an inorganic light-emitting diode (ILD) with a size of 100 microns or less. These ILDs may be mini LEDs or micro LEDs. Mini LEDs have a size range of approximately 100 μm to 500 μm, while micro LEDs are less than 100 μm. The driver circuit 103 may be a chip that provides a signal to the ILD, causing it to emit light.

[0044] In one embodiment, the driving circuit 103 may be an integrated circuit, and in particular, may be a packaged chip having multiple terminals. The driving circuit 103 may include one output terminal or at least two output terminals.

[0045] In one embodiment, as shown in FIG1 , all the light emitting units 102 of the light emitting substrate 100 are arranged into multiple columns along the second direction D2 , and each column of light emitting units is connected to multiple signal lines, and the multiple signal lines connected to the same column of light emitting units include the second signal line GNDL.

[0046] In one embodiment, as shown in FIG5 , each driver circuit 103 includes a plurality of terminals arranged in an array along a first direction D1 and a second direction D2, with the plurality of terminals arranged in at least two columns along the second direction D2. The plurality of terminals includes at least one output terminal Out and at least one ground terminal GND, with the at least one output terminal Out and the at least one ground terminal GND located in different columns of the plurality of terminals. Within each column of light-emitting cells 101, at least one output terminal Out of each driver circuit 103 is connected to a light-emitting element 104 connected to the driver circuit 103 on a one-to-one basis, thereby transmitting a drive signal to at least one light-emitting element 104.

[0047] The driver circuit 103 also includes an address terminal Di, a relay terminal, and a power terminal Pwr. The driver circuits 103 within each column of light-emitting units 101 are sequentially connected in cascade. The address terminal Di of the i-th driver circuit 103 is located on the side of the i-th driver circuit 103 that is closest to the i-1-th driver circuit 103, and the relay terminal of the i-th driver circuit 103 is located on the side of the i-th driver circuit 103 that is closest to the i+1-th driver circuit 103. When the light-emitting substrate includes M rows of light-emitting units, 1<i<M, and i is a positive integer. Within the same column of light-emitting units, adjacent driver circuits 103 are sequentially connected in cascade via cascade traces 111 extending along the first direction D1.

[0048] In the embodiment provided herein, the individual driving circuits 103 within each column of light-emitting units 101 are sequentially cascaded from bottom to top along a first direction D1. The i-th stage driving circuit 103 refers to the i-th driving circuit 103, counting upward from the M-th row of driving circuits 103 within each column of light-emitting units 101. For example, taking the first column of light-emitting units 101 as an example, the driving circuit 103 located in the M-th row of the first column is a first-stage driving circuit, the driving circuit 103 located in the M-1th row of the first column is a second-stage driving circuit, and so on. The driving circuit 103 located in the second row of the first column is an M-1th stage driving circuit, and the driving circuit 103 located in the first row of the first column is an M-1th stage driving circuit.

[0049] In the driver circuit 103 shown in FIG5 , the driver circuit 103 includes an output terminal Out, a ground terminal GND, an address terminal Di, and a power terminal Pwr. In this driver circuit 103, the output terminal Out is multiplexed as a relay terminal. That is, the output terminal Out and the relay terminal are the same terminal. The output terminal Out outputs different signals in different time periods, for example, as a relay terminal to output a relay signal and as an output terminal to output a drive signal. Adjacent output terminals Out and address terminals Di located in the same column are electrically connected via cascade traces.

[0050] In one embodiment, as shown in Figure 5, multiple terminals of the driving circuit 103 are arranged into two columns along the second direction D2. Within each column of light-emitting units 101, one column of terminals of the driving circuit 103 is located on the side of the driving circuit 103 close to the third sub-frame area 123 (i.e., on the left side of the driving circuit 103), and the other column of terminals of the driving circuit 103 is located on the side of the driving circuit 103 away from the third sub-frame area 123 (i.e., on the right side of the driving circuit 103). This arrangement of the terminals of the driving circuit 103 is conducive to promoting the regular arrangement of the various signal lines, so that the various signal lines do not overlap with each other, thereby avoiding short circuits / open circuits or signal crosstalk caused by overlap between the various signal lines. In the embodiment shown in Figure 5, the output terminal Out and the address terminal Di are located in one column, and the power terminal Pwr and the ground terminal GND of the driving circuit 103 are located in one column. In other embodiments, the number and arrangement of the terminals of the driving circuit 103 may be different from this.

[0051] In one embodiment, the light-emitting substrate further includes a plurality of first pads, on which the driver circuit 103 is mounted and electrically connected, and the first pads correspond one-to-one to the driver circuit. The first pads are provided with four sub-pads at positions corresponding to the four terminals of the driver circuit 103, respectively. These sub-pads are a first sub-pad for mounting the address terminal Di, a second sub-pad for mounting the power terminal Pwr, a third sub-pad for mounting the ground terminal GND, and a fourth sub-pad for mounting the output terminal Out. One end of the fourth sub-pad is connected to the cascade trace 111 to output a relay signal during a time period as an address signal for the next-stage driver circuit 103 cascaded with the driver circuit 103; the other end of the fourth sub-pad is connected to the light-emitting element 104 to transmit the electrical signal to the light-emitting element 104 connected to the driver circuit 103 during another time period.

[0052] In one embodiment, the light-emitting substrate further includes a plurality of second solder pads, each corresponding to a light-emitting element 104. The light-emitting element 104 is mounted on and electrically connected to the corresponding second solder pad. The second solder pad may include two fifth sub-pads, and the light-emitting unit includes two terminals, one of which is electrically connected to one of the fifth sub-pads of the second solder pad. When the light-emitting unit 102 includes a plurality of light-emitting elements 104, the second solder pads of the plurality of light-emitting elements 104 are sequentially connected in series via wires.

[0053] In one embodiment, as shown in Figures 1 and 5, the second signal line GNDL extends along the first direction D1, and a column of light-emitting units is connected to a second signal line GNDL. Specifically, each driving circuit 103 in a column of light-emitting units is connected to the second signal line GNDL. The third sub-pad is connected to the second signal line GNDL to transmit the common voltage signal on the second signal line GNDL to the ground terminal GND. The second signal line GNDL is configured to provide a ground voltage to the driving circuit 103. For example, when it is necessary to make the light-emitting element 104 in a certain light-emitting unit 102 emit light, by making the driving voltage high and the voltage of the second signal line low, a voltage difference is generated on both sides of the light-emitting element 104, thereby driving the light-emitting element 104 to emit light.

[0054] In one embodiment, as shown in Figures 1 and 5, the plurality of signal lines of the light-emitting substrate further include a plurality of address selection signal lines ADDRL extending along a first direction D1, with each column of light-emitting units connected to one address selection signal line ADDRL. The address selection signal line ADDRL is connected to the address terminal Di of the first-stage driver circuit 103 via a first sub-pad, and the output terminal Out of the previous-stage driver circuit is connected to the address terminal Di of the next-stage driver circuit 103 via a cascade trace. The address selection signal line ADDRL is configured to transmit an address signal to the address terminal Di of the first-stage driver circuit 103 within each column of light-emitting cells. After receiving the address signal, the first-stage driver circuit 103 can parse, obtain, and store the address information in the address signal as the address information of the first-stage driver circuit 103. Furthermore, the address information can be incremented by 1 or another fixed amount and modulated into a relay signal. The output terminal Out of the first-stage driver circuit 103 transmits the relay signal to the address terminal Di of the second-stage driver circuit 103 via the cascade trace as the address information of the second-stage driver circuit 103. Of course, the first-stage driver circuit 103 can also use any other appropriate function to transform its address information to generate the relay signal. The second-stage driver circuit 103 transmits the relay signal to the third-stage driver circuit 103 in a similar manner as the address information of the third-stage driver circuit 103, and so on. In this way, corresponding address information can be configured for each of the multiple cascaded driver circuits 103 within each column of light-emitting cells. Thus, for a column of light-emitting units, only one address signal line ADDRL needs to be provided to provide an address signal so that all driving circuits 103 in the column of light-emitting units can obtain their respective address information. This greatly reduces the number of signal lines, saves wiring space, and simplifies the control method.

[0055] In one embodiment, as shown in Figures 1 and 5, the multiple signal lines of the light-emitting substrate also include multiple power signal lines PwrL extending along the first direction D1, and a column of light-emitting units is connected to a power signal line PwrL. Specifically, a power signal line PwrL is connected to the power terminals Pwr of all driving circuits 103 of the corresponding column of light-emitting units. The second sub-pad is connected to the power signal line PwrL to transmit the power voltage signal on the power signal line PwrL to the power terminal Pwr. As shown in Figure 5, each power signal line PwrL includes a main body and a connecting portion 118. The main body of the power signal line PwrL extends along the first direction D1, and the power signal line PwrL is electrically connected to the driving circuit 103 through the connecting portion 118. The power signal line PwrL is configured to transmit a power voltage signal to the power terminal Pwr of each driving circuit 103, thereby providing a power voltage signal to each driving circuit 103. In an exemplary embodiment, the power voltage signal is a power line carrier communication signal. In this case, the power signal line PwrL can not only provide a power supply voltage signal to each drive circuit 103, but also provide communication data to each drive circuit 103, which can be used to control the luminous duration of at least one light-emitting element 104 connected to the drive circuit 103, thereby controlling its visual luminous brightness. The power line carrier communication signal contains information corresponding to the communication data. For example, the communication data is data reflecting the luminous duration, which represents the required luminous brightness. Compared to the conventional serial peripheral interface (SPI) protocol, the embodiment of the present application adopts the power line carrier communication (PLC) protocol to superimpose the communication data on the power signal line PwrL, thereby effectively reducing the number of signal lines.

[0056] In one embodiment, as shown in Figures 1 and 5 , the plurality of signal lines further include a plurality of feedback signal lines FBL extending along a first direction D1. Each column of light-emitting cells is connected to a single feedback signal line FBL. Specifically, a single feedback signal line FBL is connected to the output terminals Out of all the driver circuits 103 within the corresponding column of light-emitting cells via a connection portion 119. Within each column of light-emitting cells, the feedback signal line FBL is connected to the output terminal Out of the last-stage driver circuit 103.

[0057] In one embodiment, as shown in Figures 1 and 4, among the multiple signal lines (including the second signal line GNDL, the driving voltage signal line VLEDL, the addressing signal line ADDRL, the power signal line PwrL and the feedback signal line FBL) connected to the same column of light-emitting units, the second signal line GNDL is located on the same side of the other signal lines. That is, the driving voltage signal line VLEDL, the addressing signal line ADDRL, the power signal line PwrL and the feedback signal line FBL are located on the same side of the second signal line GNDL. Since the second signal line GNDL extends to the first sub-frame area 121 and is connected to the first signal line 50, the above arrangement prevents the second signal line GNDL from crossing with other signal lines when the multiple signal lines connected to the same column of light-emitting units are arranged in the same layer. In the embodiment shown in Figures 1 and 5, among the multiple signal lines connected to the same column of light-emitting units, the driving voltage signal line VLEDL, the addressing signal line ADDRL, the power signal line PwrL and the feedback signal line FBL are located on the left side of the second signal line GNDL. In other embodiments, the driving voltage signal line VLEDL, the address selection signal line ADDRL, the power signal line PwrL, and the feedback signal line FBL may be located on the right side of the second signal line GNDL.

[0058] Furthermore, as shown in Figures 1 and 5, among the signal lines connected to the same column of light-emitting units, the power signal line PwrL, the addressing signal line ADDRL, the driving voltage signal line VLEDL and the feedback signal line FBL are arranged in sequence in a direction perpendicular to the extension direction of the second signal line GNDL and in a direction away from the second signal line GNDL.

[0059] In one embodiment, the conductive connection portion 70 is a flexible conductive connection portion. Thus, the conductive connection portion can be configured into a suitable shape based on the positions of the ground signal providing structure 80 and the first signal line 50, so that the conductive connection portion 70 can be connected to the ground signal providing structure 80 and the first signal line 50, respectively. In some embodiments, the conductive connection portion 70 is a conductive tape. The conductive connection portion 70 may include a conductive material and an insulating film covering the conductive material. The conductive material is exposed only at locations for connection to the ground signal providing structure 80 and the first signal line 50, and is covered by the insulating film at other locations to prevent electrical connection with other conductive structures. The insulating film also serves to protect the conductive material.

[0060] In one embodiment, as shown in FIG2 , the ground signal providing structure 80 includes a metal grounding layer 81 located on the side of the substrate of the light-emitting substrate 100 away from the first signal line 50. The metal grounding layer may be a metal layer that supports and dissipates heat for the light-emitting substrate, or it may be a metal shell. In another embodiment, as shown in FIG3 , the ground signal providing structure 80 is a middle frame 82 located on the side of the light-emitting substrate 100. The middle frame 82 may surround the side of the light-emitting substrate. In some embodiments, the metal grounding layer 81 and the middle frame 82 surrounding the side of the light-emitting substrate 100 may be an integrated structure. In other embodiments, the ground signal providing structure may be other conductive structures of the display module that connect the ground signal.

[0061] In one embodiment, the ground signal providing structure 80 is connected to the light-emitting substrate 100. For example, the ground signal providing structure 80 and the light-emitting substrate 100 may be adhered together via an adhesive layer. This prevents the ground signal providing structure 80 and the light-emitting substrate 100 from moving relative to each other, thereby preventing the electrical connection between the ground signal providing structure 80 and the first signal line 50 from being affected.

[0062] In one embodiment, as shown in FIG6 , the light-emitting substrate 100 further includes an insulating layer 60 located on a side of the first signal line 50 away from the substrate 10 . The insulating layer 60 includes a hollow portion 61 that exposes at least a portion of the surface of the first signal line 50 . The conductive connection portion 70 is connected to the first signal line 50 through the hollow portion 61 . This ensures electrical connection between the conductive connection portion 70 and the first signal line 50 .

[0063] In one embodiment, as shown in FIG1 , the first signal line 50 includes a main signal segment 51 and a protrusion 52 located on a side of the main signal segment 51 away from the light-emitting area 110. The protrusion 52 and the main signal segment 51 are integrally formed, and the conductive connection portion 70 is connected to the protrusion 52. The main signal segment 51 refers to the portion of the first signal line 50 extending along the second direction D2. The width of the main signal segment 51 can be substantially uniform throughout. The provision of the protrusion 52 facilitates electrical connection between the conductive connection portion 70 and the first signal line 50, preventing problems such as poor connection between the conductive connection portion 70 and the main signal segment 51 due to the main signal segment 51 being too narrow.

[0064] In one embodiment, as shown in Figure 1, the first signal line 50 is an integrated structure. In other embodiments, the first signal line includes a plurality of signal segments, the plurality of signal segments are arranged at intervals in the extension direction of the signal segments, and each of the signal segments is connected to at least one second signal line.

[0065] In one embodiment, as shown in FIG1 , the first signal line 50 is an integrated structure. The first signal line 50 is provided with a plurality of protrusions 52 . The protrusions 52 are arranged at intervals in the extension direction of the main signal segment 51, that is, in the second direction D2. Each protrusion 52 is overlapped with a conductive connection portion 70 . The width of the protrusion 52 in the extension direction of the main signal segment 51 satisfies the following relationship:

[0066] Where d1 is the width of the protrusion along the extension direction of the main signal segment, n is the total number of second signal lines connected to the main signal segment, m is the total number of protrusions, and d2 is the width of the second signal line along the extension direction of the main signal segment. This configuration reduces the current flowing through each protrusion 52 and conductive connection 70, preventing the current flowing through the protrusion 52 and conductive connection 70 from exceeding their carrying capacity.

[0067] In one embodiment, as shown in FIG4 , the second sub-frame area further includes a fan-out area between the light-emitting area and the binding area 1221, and the fan-out area is provided with a plurality of fan-out lines. The plurality of fan-out lines include a second fan-out line 30. Among the signal lines connected to the light-emitting unit 102, some signal lines are connected to the binding area 1221 through the second fan-out line 30. For example, the driving voltage signal line VLEDL, the addressing signal line ADDRL, the power signal line PwrL and the feedback signal line FBL are all connected to the binding terminal of the binding area 1221 through the second fan-out line 30. The second fan-out line 30 includes a second section 31 extending along the second direction D2. Since the width of the fan-out area in the first direction D1 is constant, the width of the second section 31 of each second fan-out line 30 is limited by the width of the fan-out area in the first direction D1.

[0068] In one embodiment, the width of the second section 31 of the second fan-out line 30 connected to the drive voltage signal line VLEDL is greater than or equal to the width of the drive voltage signal line VLEDL. That is, by connecting at least a portion of the second signal line GNDL to the first signal line 50, wiring space in the fan-out region is conserved. As a result, the width of the second section 31 of the second fan-out line 30 connected to the drive voltage signal line VLEDL is set to be greater than or equal to the width of the drive voltage signal line VLEDL, effectively reducing the temperature rise in the fan-out region.

[0069] In one embodiment, as shown in FIG1 , each second signal line GNDL of the light-emitting substrate is connected to the first signal line 50. That is, each second signal line GNDL receives a ground signal through the first signal line 50. This maximizes the width of the portion of the second fan-out line extending along the second direction.

[0070] In another embodiment, as shown in FIG4 , the fan-out lines of the fan-out region further include a first fan-out line 20. At least one of the second signal lines GNDL is connected to the bonding terminal of the bonding region 1221 via the first fan-out line 20, and the other second signal lines GNDL are connected to the first signal line 50. This helps reduce the current flowing in the first signal line 50 and the conductive connection portion 70.

[0071] Furthermore, as shown in Figure 4, the first fan-out line 20 includes a first segment 21 extending along the second direction D2. The orthographic projection of the first segment 21 on a plane perpendicular to the first direction D1 does not overlap with the orthographic projection of each second segment 31 on the plane. With this arrangement, the first fan-out line 20 does not affect the width of the second segment 31 in the first direction D1. The width of the second segment 31 of the second fan-out line 30 can be increased, which helps reduce the voltage drop across the second fan-out line and the temperature rise in the fan-out area.

[0072] In one embodiment, as shown in FIG7 , the first signal line 50 is provided with N protrusions 52 . The second signal line GNDL connected to the first signal line 50 is divided into N signal line groups 40 , each of which includes a plurality of adjacent second signal lines GNDL. Each signal line group 40 corresponds to one protrusion 52 . In the extension direction of the main signal segment 51 , the two second signal lines GNDL in the same signal line group 40 with the largest distance from the corresponding protrusion are d3 and d4 , respectively, and d3 and d4 are substantially the same. The two second signal lines GNDL in the same signal line group 40 with the largest distance from the corresponding protrusion are the two second signal lines GNDL closest to the third and fourth sub-frames, respectively. "D3 and d4 being substantially the same" means being the same or having a small difference, for example, the ratio of the difference between the two to d3 or d4 is in the range of -10% to 10%. This configuration can ensure a more uniform current distribution of the ground signal transmitted by the second signal lines GNDL connected to the first signal line. In some embodiments, the number of second signal lines GNDL in each signal line group may be the same. For example, each signal line group includes six or eight second signal lines GNDL.

[0073] In one embodiment, when the first signal line 50 is located in the first sub-border area 121, the width of the second signal line GNDL adjacent to the third sub-border area 123 and the width of the second signal line GNDL adjacent to the fourth sub-border area 124 are respectively smaller than the width of the second signal line GNDL located therebetween; the second signal line GNDL adjacent to the third sub-border area 123 is connected to the first signal line 50; and / or, the second signal line GNDL adjacent to the fourth sub-border area 124 is connected to the first signal line 50. The second signal line GNDL adjacent to the third sub-border area 123 means that there is no other second signal line GNDL between the second signal line GNDL and the third sub-border area 123, but there may be other types of signal lines; the second signal line GNDL adjacent to the fourth sub-border area 124 means that there is no other second signal line GNDL between the second signal line GNDL and the fourth sub-border area 124, but there may be other types of signal lines. Affected by the third sub-border area 123 and the fourth sub-border area 124, the width of the second signal line GNDL adjacent to the third sub-border area 123 and the fourth sub-border area 124 is smaller. Connecting it to the first signal line 50 can improve the voltage drop of the second signal line GNDL compared to connecting it to the binding area 1221. Preferably, the second signal line GNDL adjacent to the third sub-border area 123 and the second signal line GNDL adjacent to the fourth sub-border area 124 are both connected to the first signal line 50.

[0074] An embodiment of the present application further provides a display device, which includes the light-emitting module according to any of the above embodiments.

[0075] In one embodiment, the display device is a liquid crystal display device, the light emitting module is used as a backlight source of the liquid crystal display panel, and the liquid crystal display device further includes a liquid crystal panel, which is located on a side of the light emitting module away from the substrate.

[0076] In another embodiment, each inorganic light-emitting element of the display device serves as a sub-pixel.

[0077] This application does not impose any specific restrictions on the applicability of display devices. It can be any product or component with display function, such as televisions, laptops, tablets, wearable display devices, mobile phones, car displays, navigation, e-books, digital photo frames, advertising light boxes, etc.

[0078] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it may be the only layer between the two layers or elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0079] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the contents disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0080] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A light emitting module, characterized in that: The light-emitting module includes a light-emitting substrate, a conductive connection portion and a ground signal providing structure; The light-emitting substrate includes a light-emitting area and a frame area located on at least one side of the light-emitting area; The light-emitting substrate includes a substrate and a plurality of signal lines located on one side of the substrate, the plurality of signal lines including a first signal line and a plurality of second signal lines; the first signal line is located in the border area, the plurality of second signal lines extend to the light-emitting area, and at least part of the second signal lines is connected to the first signal line; the two ends of the conductive connection portion are respectively electrically connected to the first signal line and the ground signal providing structure.

2. The light emitting module according to claim 1, wherein: The border area includes a first sub-border area and a second sub-border area located on opposite sides of the light-emitting area. The first signal line is located in the first sub-border area. The second sub-border area includes a binding area, and the binding area is provided with a binding terminal. The second signal line extends in a direction from the first sub-border area to the second sub-border area.

3. The light emitting module according to claim 1, wherein: The conductive connecting portion is a flexible conductive connecting portion.

4. The light emitting module according to claim 1, wherein: The light-emitting substrate further includes an insulating layer located on a side of the first signal line away from the substrate. The insulating layer is provided with a hollow portion exposing at least a portion of the surface of the first signal line. The conductive connection portion is overlapped with the first signal line through the hollow portion.

5. The light emitting module according to claim 1, wherein: The first signal line includes a main signal segment and a protruding portion located on a side of the main signal segment away from the light-emitting area. The protruding portion and the main signal segment are an integrated structure, and the conductive connecting portion is connected to the protruding portion.

6. The light emitting module according to claim 5, characterized in that: The first signal line is provided with a plurality of protrusions, and the protrusions are arranged at intervals in the extension direction of the main signal segment; the width of the protrusions in the extension direction of the main signal segment satisfies the following relationship: Wherein, d1 is the width of the protrusion in the extension direction of the main signal segment, n is the total number of the second signal lines connected to the first signal line, m is the total number of the protrusions, and d2 is the width of the second signal line in the extension direction of the main signal segment.

7. The light emitting module according to claim 5, characterized in that: The first signal line is provided with N protruding portions, and the second signal lines connected to the first signal line are divided into N signal line groups, each of the signal line groups includes a plurality of adjacent second signal lines; each of the signal line groups corresponds to one protruding portion; In the extending direction of the main signal segment, the distances between the two second signal lines with the largest distance between them in the same signal line group and the corresponding protrusions are substantially the same.

8. The light emitting module according to claim 1, wherein: The light-emitting substrate includes a plurality of light-emitting units located on one side of the substrate, and the plurality of light-emitting units and the first signal line are located on the same side of the substrate; The second signal line extends along a first direction, and the multiple light-emitting units are arranged into multiple columns along a second direction intersecting the first direction, each of the second signal lines is connected to a column of light-emitting units; each column of light-emitting units is connected to multiple signal lines; among the signal lines connected to the same column of light-emitting units, the second signal line is located on the same side as other signal lines.

9. The light emitting module according to claim 8, characterized in that: The multiple signal lines connected to the same column of light-emitting units include the second signal line, the driving voltage signal line, the site selection signal line, the power signal line and the feedback signal line; among the signal lines connected to the same column of light-emitting units, the power signal line, the site selection signal line, the driving voltage signal line and the feedback signal line are arranged in sequence in a direction perpendicular to the extension direction of the second signal line and in a direction away from the second signal line.

10. The light emitting module according to claim 1, wherein: Each of the second signal lines of the light-emitting substrate is connected to the first signal line respectively.

11. The light emitting module according to claim 1, wherein: The frame area includes a first sub-frame area and a second sub-frame area located on opposite sides of the light-emitting area, the second signal line extends along a first direction, and the first sub-frame area and the second sub-frame area extend along a second direction intersecting the first direction; the second sub-frame area includes a fan-out area and a binding area located on the side of the fan-out area away from the light-emitting area, the light-emitting substrate also includes a plurality of binding terminals located in the binding area and a plurality of fan-out lines located in the fan-out area, the plurality of fan-out lines include a first fan-out line and a second fan-out line; the two ends of the first fan-out line are respectively connected to the second signal line and the binding terminals; the first fan-out line includes a first segment extending along the second direction, the second fan-out line includes a second segment extending along the second direction, and the orthographic projection of the first segment on a plane perpendicular to the first direction has no overlap with the orthographic projection of the second segment on the plane.

12. The light emitting module according to claim 1, wherein: The border area includes a first sub-border area, a second sub-border area, a third sub-border area and a fourth sub-border area. The first sub-border area is arranged opposite to the second sub-border area, and the third sub-border area is arranged opposite to the fourth sub-border area and the extension direction is the same as the extension direction of the second signal line; the first signal line is located in the first sub-border area; the width of the second signal line adjacent to the third sub-border area and the width of the second signal line adjacent to the fourth sub-border area are respectively smaller than the width of the second signal line located therebetween; the second signal line adjacent to the third sub-border area is connected to the first signal line; and / or, the second signal line adjacent to the fourth sub-border area is connected to the first signal line.

13. The light emitting module according to claim 1, wherein: The ground signal providing structure includes a metal ground layer located on a side of the substrate of the light emitting substrate away from the first signal line, or the ground signal providing structure is a middle frame located on a side of the light emitting substrate.

14. The light emitting module according to claim 1, wherein: The border area includes a first sub-border area and a second sub-border area located on opposite sides of the light-emitting area. The light-emitting substrate also includes a driving voltage signal line located in the light-emitting area. The second signal line and the driving voltage signal line extend along a first direction respectively. The first sub-border area and the second sub-border area extend along a second direction intersecting with the first direction. The second sub-border area includes a fan-out area and a binding area located on a side of the fan-out area away from the light-emitting area. The light-emitting substrate also includes a plurality of binding terminals located in the binding area and a second fan-out line located in the fan-out area. The driving voltage signal line is connected to the binding terminal through the second fan-out line. The second fan-out line includes a second segment extending along the second direction. The width of the second segment of the second fan-out line connected to the driving voltage signal line is greater than or equal to the width of the driving voltage signal line.

15. The light emitting module according to claim 1, wherein: The first signal line includes a plurality of signal segments, the plurality of signal segments are arranged at intervals in the extension direction of the signal segments, and each of the signal segments is connected to at least one second signal line; or the first signal line is an integrated structure.

16. A display device, characterized in that: The display device includes the light emitting module according to any one of claims 1 to 15.

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