Light-emitting module and display device

A light-emitting module and a display device are provided. The light-emitting module includes a backlight module and a first circuit board electrically connected to the backlight module. The first circuit board includes a first surface and at least one first electrical connection terminal on the first surface; the backlight module includes a second circuit board, the second circuit board includes at least one second electrical connection terminal, and the at least one first electrical connection terminal and the at least one second electrical connection terminal are electrically connected on the first surface to form an electrical connection region; the light-emitting module further includes a fixing adhesive film; the fixing adhesive film includes a first light-transmitting region; and the light-emitting module at least includes a first state, the electrical connection region is visible through the first light-transmitting region in the first state.

This application claims priority to Chinese Patent Application No. 202410288645.3, titled “LIGHT-EMITTING MODULE AND DISPLAY DEVICE”, filed on Mar. 13, 2024 with the China National Intellectual Property Administration, which is hereby incorporated by reference in its entirety.

FIELD

The present disclosure relates to the field of display technology, and in particular to a light-emitting module and a display device.

BACKGROUND

Over decades of development, the display industry has evolved rapidly, transitioning from the era of Cathode Ray Tubes (CRTs) to Liquid Crystal Displays (LCDs), and now to Organic Light-Emitting Diodes (OLEDs) and light-emitting diode displays. This evolution has become closely intertwined with our lives, as electronic devices such as traditional mobile phones, tablets, TVs, PCs, smart wearable devices, VR systems, and vehicle displays rely heavily on the display technology.

In the manufacturing process of display products, there are multiple stages for a quality inspection process. However, due to the structural characteristics of display products, it is difficult to avoid the issue of missed inspections in certain areas. Therefore, there is an interest in how to reduce the probability of missed inspections for display products.

SUMMARY

In view of the above, a light-emitting module and a display device are provided according to embodiments of present disclosure. The quality inspection for an electrical connection region between a backlight module and a first circuit board can be implemented, which reduces the probability of missed inspections for display products.

In one embodiment, a light-emitting module is provided according to an embodiment according to the present disclosure. The light-emitting module includes a backlight module and a first circuit board electrically connected to the backlight module, where the first circuit board includes a first surface and at least one first electrical connection terminal on the first surface; the backlight module includes a second circuit board, where the second circuit board includes at least one second electrical connection terminal, and the at least one first electrical connection terminal and the at least one second electrical connection terminal are electrically connected on the first surface to form an electrical connection region; the light-emitting module further includes a fixing adhesive film, where the fixing adhesive film at least covers the first surface, an overlapping region of the second circuit board and the first surface, and the electrical connection region; the fixing adhesive film includes a first light-transmitting region, where the first light-transmitting region and the electrical connection region are overlapped in a first direction, the first direction is perpendicular to a plane where the first circuit board is located; and the light-emitting module at least includes a first state, where the electrical connection region is visible through the first light-transmitting region in the first state.

In one embodiment, based on the embodiments, a display device is provided according to an embodiment of the present disclosure. The display device includes the light-emitting module according to the embodiments of the present disclosure.

Any product implemented in the present disclosure does not necessarily need to achieve all the above-mentioned effects simultaneously.

Embodiments of the present disclosure will become apparent from following detailed description of exemplary embodiments of the present disclosure with reference to accompanying drawings.

DETAILED DESCRIPTION OF EMBODIMENTS

Various exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless otherwise specifically stated.

The following description of at least one exemplary embodiment is merely illustrative and does not limit the present disclosure, application, or usages of present disclosure.

Techniques, methods, and devices known to those skilled in the art may not be provided in detail. However, such techniques, methods and devices should, where appropriate, be considered a part of the specification.

In all embodiments shown and provided herein, any specific values are to be construed as illustrative only and not as limiting. Accordingly, other exemplary embodiments may have different values.

It is apparent that various modifications and changes may be made to the present disclosure without departing from the embodiments of the present disclosure. Thus, the present disclosure is intended for covering modifications and variations made thereto, which fall within the scope of the corresponding claims (embodiments as claimed) and their equivalents. Embodiments of the present disclosure can be combined as long as they do not contradict with each other.

It should be noted that similar reference numerals and letters refer to similar items in the following drawings. Once an item is defined in one figure, there is no need to repeat in subsequent figures.

FIG.1is a top view of a light-emitting module100according to an embodiment of the present disclosure.FIG.2is a schematic diagram of an electrical connection of a backlight module10and a first circuit board20in the light-emitting module100according to an embodiment of the present disclosure. To clearly show the connection relationship between the backlight module10and the first circuit board20, the fixing adhesive film30is not shown inFIG.2.FIG.1is a top view structure after the fixing adhesive film30and the first circuit board20are fixed. Reference is made toFIGS.1and2, a light-emitting module100is provided according to an embodiment of the present disclosure. The light-emitting module100includes a backlight module10and a first circuit board20electrically connected to the backlight module10. The first circuit board20includes a first surface M1 and at least one first electrical connection terminal41on the first surface M1; the backlight module10includes a second circuit board12, the second circuit board12includes at least one second electrical connection terminal42, the first electrical connection terminal41and the second electrical connection terminal42are electrically connected to form an electrical connection region A1 on the first surface M1. In one embodiment, the first electrical connection terminal41and the second electrical connection terminal42are electrically connected by snapping or plugging. Other feasible ways may also be configured for electrical connection, which is not specifically limited by the present disclosure. In one embodiment, the second circuit board12is a flexible circuit board electrically connected to the backlight module10, and the first circuit board20is a PCB board that provides an electrical signal to the flexible circuit board.

The light-emitting module100further includes a fixing adhesive film30. The fixing adhesive film30at least covers the first surface M1, the overlapping region of the second circuit board12and the first surface M1, and the electrical connection region A1. The fixing adhesive film30includes a first light-transmitting region90, the first light-transmitting region90and the electrical connection region A1 are overlapped in a first direction D1. The first direction D1 is a direction perpendicular to a plane where the first circuit board20is located. The light-emitting module at least includes a first state, the electrical connection region A1 is visible through the first light-transmitting region90in the first state.

As an example, the backlight module10and the first circuit board20are provided in rectangular structures for illustration as shown inFIG.1andFIG.2, which do not limit actual shapes of the backlight module10and the first circuit board20. In some other embodiments of the present disclosure, the backlight module10and the first circuit board20may also be configured in other shapes according to practical requirements, which are not specifically limited by the present disclosure. In addition, the sizes of the backlight module10and the first circuit board20are only for illustration, and actual size and relative size relationship between the backlight module10and the first circuit board20are not limited in the present disclosure.

Reference is made toFIGS.1and2, in the light-emitting module100according to an embodiment of the present disclosure, the second electrical connection terminal42on the second circuit board12in the backlight module10is electrically connected to the first electrical connection terminal41on the first circuit board20to form the electrical connection region A1. The electrical connection region A1 may be regarded as a region where the first electrical connection terminal41and the second electrical connection terminal42are actually electrically connected. This region includes a region where the first electrical connection terminal41is located and a region where the second electrical connection terminal42is located. The first circuit board20is configured to provide the electrical signal to the backlight module10, and the reliability of the electrical connection between the two terminals in the electrical connection region A1 directly determines the light-emitting effect of the backlight module10. In this embodiment, the electrical connection region A1 is provided as a rectangular region as an example for description, which does not limit the specific shape of the electrical connection region A1.

The light-emitting module100further includes a fixing adhesive film30covering the first circuit board20. The fixing adhesive film30serves as an electromagnetic shielding function to prevent the first circuit board20from being interfered by external signals. In one embodiment, the fixing adhesive film30covers the whole first surface M1 of the first circuit board20. In actual products, only the edge region of the fixing adhesive film30may be fixed to the edge region of the first surface M1 of the first circuit board20, without bonding the middle region with adhesive. It should be noted that a part of the first circuit board20is extended to a periphery of the fixing adhesive film30inFIG.1to reflect the relative positional relationship between the first circuit board20and the fixing adhesive film30. In fact, the fixing adhesive film30fully covers the first surface of the first circuit board.FIG.2only illustrates the first electrical connection terminal41on the first surface of the first circuit board20and does not show other structures on the first surface M1. In fact, the first surface M1 is further provided with other electronic components.

In the related technologies, when the fixing adhesive film covers the first circuit board, the fixing adhesive film is usually a black adhesive film. When the electrical connection region is fully covered by the black adhesive film, the connection status of the electrical connection region may not be inspected, resulting in the problem of missed inspection in the electrical connection region.

To solve the above problem, the fixing adhesive film30according to an embodiment of the present disclosure includes the first light-transmitting region90corresponding to the electrical connection region A1. In the first state, the electrical connection region A1 is visible through the first light-transmitting region90. In this way, the quality inspection of the state of the above electrical connection region A1 can be achieved through visual inspection, where the connection status of the first electrical connection terminal41and the second electrical connection terminal42can be clearly viewed. Compared with the method in related technologies that cannot conduct quality inspection on the electrical connection region A1, the probability of missed inspection of products can be effectively reduced. In addition, such visual inspection method is beneficial to improving the efficiency of product quality inspection.

FIG.3illustrates a schematic diagram of layers of the fixing adhesive film30according to an embodiment of the present disclosure.FIG.4illustrates a top view of the relationship between the fixing adhesive film30and the electrical connection region A1 inFIG.3. Reference is made toFIGS.3and4. In one embodiment of the present disclosure, when the light-emitting module only includes the first state, in the first direction D1, an outer outline of an orthographic projection of the first light-transmitting region90on the plane where the first circuit board20is located is located at the periphery of an outer outline of orthographic projection of the electrical connection region A1 on the plane where the first circuit board20is located, which is equivalent to expanding the orthographic projection of the first light-transmitting region90relative to the orthographic projection of the electrical connection region A1.

In this embodiment, the relative positional relationship between the first light-transmitting region90of the fixing adhesive film30and the electrical connection region A1 is further limited. The area of the first light-transmitting region90is configured to be greater than the area of the electrical connection region A1, and the first light-transmitting region90is expanded to a certain extent relative to the electrical connection region A1 while fully covering the electrical connection region A1. In this way, it can, to a certain extent, ensure that the electrical connection region A1 is visible through the first light-transmitting region90in the first state to guarantee the efficiency of quality inspection, even if a certain alignment deviation occurs while fixing the adhesive film30to the first surface M1 of the first circuit board20. In addition, since the orthographic projection of the first light-transmitting region90is expanded relative to the orthographic projection of the electrical connection region A1, when inspecting the connection state of the electrical connection region A1 through the first light-transmitting region90in the visual inspection manner, the condition around the electrical connection region A1 can also be observed simultaneously, which is beneficial to increasing the scope of quality inspection to a certain extent.

Further referring toFIGS.3and4, in an embodiment of the present disclosure, there is a first space between the outer outline of the first light-transmitting region90and the outer outline of the electrical connection region A1, and a width D of the first space ranges from 0.5 mm to 1 mm.

Given that there may be a certain alignment deviation when fixing the fixing adhesive film30to the first surface M1 of the first circuit board20and the alignment deviation is generally no greater than 0.5 mm, by configuring the width D of the first space between the outer outline of the first light-transmitting region90and the outer outline of the electrical connection region A1 to be greater than or equal to 0.5 mm, it ensures that the whole electrical connection region A1 is visible through the first light-transmitting region90in the first state to facilitate quality inspection, even if the alignment deviation occurs between the fixing adhesive film30and the first circuit board20. In addition, given that a large area of the first light-transmitting region90may cause a great risk of light leakage from the backlight module10in the first light-transmitting region90, the width D of the first space between the outer outline of the first light-transmitting region90and the outer outline of the electrical connection region A1 is configured to be less than or equal to 1 mm, which is beneficial to reducing the risk of light leakage in the first light-transmitting region90. In one embodiment, D is any one of 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm and 1 mm.

Reference is made toFIGS.3and4, in an embodiment, the fixing adhesive film30includes a first release film31and a second release film32oppositely arranged in the first direction D1, and a light-shielding adhesive layer33located between the first release film31and the second release film32. When the light-emitting module only includes the first state, the light-shielding adhesive layer33includes a first opening K1, and the first opening K1 runs through the light-shielding adhesive layer33in the thickness direction of the light-shielding adhesive layer33. The projection of the first light-transmitting region90and that of the first opening K1 are overlapped in the first direction D1.

FIG.3schematically shows a layer structure of the fixing adhesive film30according to an embodiment. The fixing adhesive film30includes a first release film31, a light-shielding adhesive layer33and a second release film32stacked in the first direction D1. In an embodiment, the first release film31and the second release film32are layers with a light-transmitting effect, and the light-shielding adhesive layer33does not have a light-transmitting effect. The light-shielding adhesive layer33is located between the first release film31and the second release film32in the first direction D1. When the light-emitting module only includes the first state, the first light-transmitting region90of the fixing adhesive film30is obtained by removing a part of the light-shielding adhesive layer33between the first release film31and the second release film32. In other words, a first opening K1 is formed on the light-shielding adhesive layer33and runs through the light-shielding adhesive layer33in the thickness direction. The region corresponding to the first opening K1 may be regarded as the first light-transmitting region90. Since both the first release film31and the second release film32have certain light-transmitting properties, when the first opening K1 is formed on the light-shielding adhesive layer33, an observer may observe the state of the electrical connection region A1 through the first release film31, the first opening K1 and the second release film32of the first light-transmitting region90. Such a structure is simple to manufacture, which is beneficial to simplifying the process for manufacturing the fixing adhesive film30with the first light-transmitting region90.

In an embodiment, in the fixing adhesive film30provided in the present disclosure, the light-shielding adhesive layer33is a light-shielding adhesive layer33with conductive property. The light-shielding adhesive layer33is a layer in the fixing adhesive film30that has an electromagnetic shielding effect. In this way, the light-shielding adhesive layer33plays a role of light-shielding and electromagnetic shielding at the same time. There is no need to separately introduce a layer for light-shielding and a layer for electromagnetic shielding into the fixing adhesive film30, which is beneficial to simplifying the layer structure of the fixing adhesive film30.

Reference is made toFIG.3. In one embodiment of the present disclosure, the fixing adhesive film30further includes an insulating adhesive layer34. The insulating adhesive layer34is located between the light-shielding adhesive layer33and the second release film32in the first direction D1. The transparency of at least one of the first release film31, the second release film32and the insulating adhesive layer34in the first light-transmitting region90is less than or equal to 50%.

When the insulating adhesive layer34is provided between the light-shielding adhesive layer33and the second release film32, the insulating adhesive layer34can be configured to electrically isolate the light-shielding adhesive layer33and the first surface M1 of the first circuit board20to prevent the light-shielding adhesive layer33with conductive function from contacting the first surface of the first circuit board and affecting the electrical performance of the electronic components on the first surface, to facilitate the stability of the electrical performance of the first circuit board.

Layers of the fixing adhesive film30in the first light-transmitting region90includes the first release film31, the insulating adhesive layer34and the second release film32. The transparency of the light-transmitting region90can be adjusted by setting the transparency of these three layers. For example, when the transparency of at least one of the first release film31, the second release film32and the insulating adhesive layer34in the first light-transmitting region90is set to less than or equal to 50%, the first light-transmitting region90may be in a translucent state, or the transparency of the first light-transmitting region90can be set lower without affecting the observation of the electrical connection region A1, to minimize the amount of light leakage of the backlight module10from the first light-transmitting region A1 and meet needs of customers who have requirements for visual light leakage. In an actual product, in a case that the first release film31and the second release film32are transparent films, the transparency of the first light-transmitting region90may be adjusted by adjusting the transparency of the insulating adhesive layer34. In one embodiment, the insulating adhesive layer34includes PET material. When the transparency of the first light-transmitting region90is required to be reduced, the insulating adhesive layer34may use a translucent PET material. When the transparency of the first light-transmitting region90is further reduced, the PET material may be replaced with other dark-colored light-transmitting films.

In a case that there is no requirement for the visual light leakage of the first light-transmitting region90, the transparency of the first light-transmitting region90may be set higher, to facilitate observing the state of the electrical connection region A1 and improve the efficiency of quality inspection.

The above embodiment illustrates a solution in which the light-emitting module only includes the first state. In this solution, the existence of the first light-transmitting region enables the quality inspector to visually inspect the state of the electrical connection region A1 through the first light-transmitting region90at all times. In some other embodiments of the present disclosure, the light-emitting module may further include a second state. Reference is made toFIG.5.FIG.5is a diagram of a relative position relationship of a fixing adhesive film30and a light-shielding closure80according to an embodiment of the present disclosure.FIG.6is a diagram of a relative position relationship of a fixing adhesive film30and a light-shielding closure80according to another embodiment of the present disclosure.

Reference is made toFIGS.5and6.FIG.5corresponds to the first state of the light-emitting module, whileFIG.6corresponds to the second state of the light-emitting module. In one embodiment of the present disclosure, the light-emitting module further includes a light-shielding closure80; the light-emitting module further includes a second state. In the second state, the light-shielding closure80covers the first light-transmitting region90.

Compared with the embodiment shown inFIG.3, in this embodiment, a light-shielding closure80is provided. In the first state, as shown inFIG.5, the light-shielding closure80may be opened, and the first light-transmitting region90or at least part of the first light-transmitting region90is not covered by the light-shielding closure80. In this case, the electrical connection region A1 is visible through the first light-transmitting region90. Quality inspection may be performed on the state of the electrical connection region A1 through the first light-transmitting region90, the first state is suitable for the process of quality inspection. When the quality inspection is not required or is completed, the light-emitting module enters the second state. As shown inFIG.6, in the second state, the light-shielding closure80covers the first light-transmitting region90to prevent the light emitted by the backlight module10from leaking via the first light-transmitting region90, which is especially suitable for the higher requirements for visual light leakage. By providing the light-shielding closure80in the embodiment, the light-emitting module may be switched between the first state and the second state to meet usage requirements of different scenarios.

The embodiments ofFIGS.5and6show a solution of providing the light-shielding closure80based on the embodiment ofFIG.3. In this case, the formation of the first light-transmitting region90may be obtained by removing a part of the light-shielding adhesive layer33, for example, using the structure of the embodiment shown inFIG.3. In one embodiment, the light-shielding closure80is a structure independent of the fixing adhesive film30, which may enable the first light-transmitting region90visible in the first state and cover the first light-transmitting region90in the second state.

In some other embodiments of the present disclosure, at least part of the layers of the fixing adhesive film30are used as the light-shielding closure80. Reference is made toFIGS.7and8.FIG.7is a diagram of a relative positional relationship of the fixing adhesive film30and the light-shielding closure80according to an embodiment of the present disclosure, which corresponds to the first state of the light-emitting module.FIG.8is a diagram of a relative positional relationship of the fixing adhesive film30and the light-shielding closure80according to another embodiment of the present disclosure, which corresponds to the second state of the light-emitting module. In one embodiment, the light-shielding closure80reuses a part of the layers of the fixing adhesive film30. In this way, there is no need to introduce other structures into the light-emitting module to manufacture the light-shielding closure80, which is beneficial to simplifying the overall structure of the light-emitting module. When at least a part of the layers of the fixing adhesive film30is used as the light-shielding closure80, in the first state, at least a part of the layers of the fixing adhesive film30reused as the light-shielding closure80does not cover the first light-transmitting region90, and the electrical connection region A1 is visible to meet the demand for quality inspection of the state of the electrical connection region; in the second state, the layers of the fixing adhesive film30reused as the light-shielding closure80covers the first light-transmitting region90, and the electrical connection region is invisible, to prevent the light emitted by the backlight module10from leaking through the first light-transmitting region90.

Reference is made toFIGS.7and8in combination withFIGS.1and2. In an embodiment of the present disclosure, the fixing adhesive film30includes a first release film31and a first release film31that are oppositely arranged in the first direction D1, and a light-shielding adhesive layer33located between the first release film31and the second release film32. The first release film31is located on a side of the second release film32facing away from the first surface M1 of the first circuit board20. The light-shielding closure80includes a folding portion81and a connecting portion82connected to the folding portion81. The folding portion81is folded using the connecting portion82as a pivot. The folding portion81at least includes the first release film31and the light-shielding adhesive layer33, the connecting portion82at least includes the first release film31. In an embodiment, the connecting portion82includes the layers consistent with the folding portion81, when the folding portion81includes the first release film31and the light-shielding adhesive layer33, the connection portion82may include the first release film31and the light-shielding adhesive layer33. In the first state, the folding portion81uses the connecting portion82as the pivot and is folded towards a side away from the electrical connection region A1 to form the first light-transmitting region90. In the second state, the projection of the light-shielding adhesive layer33in the folding portion81covers the first light-transmitting region90in the first direction D1.

This embodiment illustrates the structure when the light-shielding closure80reuses at least a part of the layers of the fixing adhesive film30. When forming the light-shielding closure80on the fixing adhesive film30, the light-shielding closure80may be formed through cutting at least a part of the layers of the fixing adhesive film30above the electrical connection region A1. Reference is made toFIG.9.FIG.9is a top view of the fixing adhesive film30according to an embodiment of the present disclosure. The dashed line may be regarded as a cutting line X. During actual cutting, the first release film31and the light-shielding adhesive layer33may be cut along the cutting line X to form the connecting portion82and the folding portion81. An edge of the folding portion81corresponds to the cutting line X. The folding portion81may be folded towards a side away from the electrical connection region A1 with the connecting portion82as the pivot (or rotating axis). In this case, the light-emitting module is in the first state and the electrical connection region A1 is visible. The folding portion81may further be flipped above the first light-transmitting region90and cover the first light-transmitting region90with the connecting portion82as the pivot. In this case, the light-emitting module is in the second state, and the light-shielding adhesive layer33in the folding portion81plays a light-shielding role to prevent the light emitted by the backlight module from leaking through the first light-transmitting region90. In an embodiment, in the second state, the light-shielding adhesive layer33in the light-shielding closure80aligns with the light-shielding adhesive layer33in other regions of the fixing adhesive film30. The first release film31in the light-shielding closure80aligns with the first release films31in other regions of the fixing adhesive film30. In this embodiment, the light-shielding closure80reuses the light-shielding adhesive layer33and the first release film31in the fixing adhesive film30. The structural characteristics of the fixing adhesive film30are rationally utilized, the quality inspection and light leakage prevention requirements of the electrical connection region A1 of the light-emitting module are met, and the layer structure of the light-emitting module is simplified.

FIG.10is a diagram of a relative positional relationship of the fixing adhesive film30and the light-shielding closure80according to another embodiment of the present disclosure. As shown inFIG.10, in one embodiment, the light-shielding closure80further includes a first isolation portion71located at least on a surface of the light-shielding closure80away from the first release film31.

This embodiment shows a solution of providing the first isolation portion71on the surface of the light-shielding closure80facing away from the first release film31. In one embodiment, the first isolation portion71may also be made of a release film. The first isolation portion71has no adhesiveness. In the second state of the light-emitting module, the surface of the light-shielding closure80provided with the first isolation portion71may be regarded as the surface of the light-shielding closure80facing the electrical connection region A1. In this way, in the second state, the first isolation portion71may be located between the insulating adhesive layer34in the fixing adhesive film30and other layers of the light-shielding closure80to eliminate the problem that the light-shielding closure80is difficult to fold when the insulating adhesive layer34is in direct contact with other adhesive layers in the light-shielding closure80. Therefore, it is beneficial to improve the operational convenience of switching the light-emitting module between the second state and the first state.

FIG.11is a diagram of a relative positional relationship of the fixing adhesive film30and the light-shielding closure80according to another embodiment of the present disclosure. Reference is made toFIG.11, in one embodiment of the present disclosure, the light-shielding closure80further includes a second isolation portion72located at least on the side surface of the light-shielding adhesive layer33in the light-shielding closure80.

When the light-shielding closure80reuses a part of the layers of the fixing adhesive film30, the light-shielding closure80is obtained by cutting a part of the layers of the fixing adhesive film30. Since the light-shielding adhesive layer33belongs to the cut layer, the side surface of the light-shielding closure80contains the light-shielding adhesive layer33. When the second isolation film is provided on the side surface of the light-shielding closure80in this embodiment, it can prevent the side surface of the light-shielding adhesive layer33in the light-shielding closure80from being directly in contact with the side surface of the light-shielding adhesive layer33in other regions of the fixing adhesive film30in the second state, to eliminate the problem that the light-shielding closure80is difficult to fold due to the tight adhesion of the light-shielding adhesive layer33. Hence, it is beneficial to improve the operational convenience of the light-emitting module switching between the second state and the first state. It should be noted that, in order to ensure that the light-shielding closure80may smoothly switch from the first state to the second state with the second isolation portion72on the side surface of the light-shielding closure80, at least a part of the sidewall of the light-shielding closure80may be removed while forming the light-shielding closure80by cutting, to leave a space for the second isolation portion72.

FIG.12is a diagram of a relative positional relationship of the fixing adhesive film30and the light-shielding closure80according to another embodiment of the present disclosure, which corresponds to the first state of the light-emitting module.FIG.13is a diagram of a relative positional relationship of the fixing adhesive film30and the light-shielding closure80according to another embodiment of the present disclosure, which corresponds to the second state of the light-emitting module. Compared with embodiments ofFIGS.7and8, the first adhesive layer35is provided in this embodiment. Reference is made toFIGS.12and13, in one embodiment of the present disclosure, the fixing adhesive film30further includes the insulating adhesive layer34and the first adhesive layer35, the insulating adhesive layer34and the first adhesive layer35are located between the light-shielding adhesive layer33and the second release film32, and the insulating adhesive layer34is located between the first adhesive layer35and the second release film32. The first adhesive layer35includes a second opening K2, the second opening K2 runs through the first adhesive layer35in the first direction D1, and the projection of the second opening K2 and that of the first light-transmitting region90are overlapped.

In addition to the first release film31, the second release film32and the light-shielding adhesive layer33, this embodiment shows a solution in which the fixing adhesive film30further includes an insulating adhesive layer34and a first adhesive layer35. The insulating adhesive layer34and the first adhesive layer35are located on the side surface of the light-shielding adhesive layer33facing the second release film32, and the first adhesive layer35is located between the light-shielding adhesive layer33and the second release film32. The configuration of the first adhesive layer35between the light-shielding adhesive layer33and the insulating adhesive layer34increases a vertical distance between the light-shielding adhesive layer33and the insulating adhesive layer34. In the first light-transmitting region90, the first adhesive layer35includes the second opening K2 running through the first adhesive layer35. Further referring toFIGS.1and2, in the second state of the light-emitting module, the second opening K2 is located between the surface (assumed to be the lower surface) of the light-shielding closure80facing the electrical connection region A1 and the surface of the insulating adhesive layer34facing the light-shielding closure80, which serves as a gap between the light-shielding closure80and the insulating adhesive layer34, which is beneficial to eliminate the problem that the light-shielding closure80is difficult to tear off due to the adhesion of the light-shielding closure80and the insulating adhesive layer34, to further improve the operation convenience of the light-emitting module switching between the second state and the first state. In the second state of the light-emitting module, the light-shielding closure80covers the first light-transmitting region90, which is helpful to prevent the light of the backlight module10from leaking through the first light-transmitting region90. In the first state of the light-emitting module, the light-shielding closure80is folded to enable the electrical connection region A1 to be visible, to meet the quality inspection requirements of the electrical connection region A1.

FIGS.14and15illustrate diagrams of relative positional relationships of the fixing adhesive film30and the light-shielding closure80according to another embodiment of the present disclosure, which correspond to the first state and the second state of the light-emitting module respectively. Compared withFIGS.12and13, a third isolation portion73is provided. Reference is made toFIGS.14and15, in one embodiment of the present disclosure, the light shielding closure80includes a third isolation portion73, and the third isolation portion73is at least located on a side surface of the light-shielding adhesive layer33in the light-shielding closure80facing away from the first release film31.

In this embodiment, a third isolation portion73is provided on the light-shielding closure80. In the second state of the light-emitting module, the third isolation portion73is located between other layers (e.g. light-shielding adhesive layer33) other than the third isolation portion73in the light-shielding closure80and the insulating adhesive layer34in the fixing adhesive film30and is located in the region corresponding to the second opening K2. The third isolation portion73is non-adhesive, which can prevent the problem that the light-shielding closure80is difficult to tear off due to a direct contact between the adhesive layer in the light-shielding closure80and the insulating adhesive layer34in the fixed adhesive layer30. By configuring the third isolation portion73on the side surface of the light-shielding closure80away from the first release film31, it is beneficial to improving the operational convenience of the light-emitting module switching between the second state and the first state.

FIGS.16and17illustrate structural schematic diagrams of a light-emitting module providing with a tearing portion60, which correspond to the first state and the second state of the light-emitting module respectively. Reference is made toFIGS.16and17, in one embodiment of the present disclosure, the light-emitting module further includes a tearing portion60, the tearing portion60is located on a side of the first release film31in the folding portion81away from the light-shielding adhesive layer33, and the tearing portion60and the folding portion81are fixed.

This embodiment shows a solution of providing a tearing portion60for the light-shielding closure80. The tearing portion60is fixed to the first release film31in the folding portion81and is located on the surface of the first release film31away from the light-shielding adhesive layer33. In the first state, the tearing portion60drives the light-shielding closure80to flip towards a direction away from the second release film32. In the second state, at least a part of region of the tearing portion60is parallel with the plane where the second release film32is located. When the tearing portion60is provided, the operator can switch the folding portion81between the first state and the second state by applying force to the tearing portion, which is beneficial to improving the operational convenience for the operator.

Reference is made toFIGS.16and17. In one embodiment of the present disclosure, the tearing portion60includes a first part61and an extension part62connected to the first part61. The first part61and the folding portion81are fixed, in the second state, the extension part62is at least located on the side of the first part61away from the connecting portion82.

This embodiment describes the specific structure of the tearing portion60. The tearing portion60includes a first part61fixed to the folding portion81and an extension part62located on the side of the first part61away from the connecting portion82. In one embodiment, the first part61and the tearing portion60are integrally formed. During quality inspection of the electrical connection region A1, the operator can apply an upward pulling force to the extension part62to enable the folding portion81to flip away from the second release film32, and the electrical connection region A1 is visible, i.e., the first state is entered. After the quality inspection is completed, the operator can apply force to the extension part62to move it towards the direction of the second release film32and cover the first light-transmitting region90, to prevent the light from the backlight module10from leaking through the first light-transmitting region90. When providing the tearing portion60with the extension part62, the operator can apply force to the extension part62using tools such as tweezers, which makes the operation simpler and facilitates improving the operational convenience of the light-emitting module switching between the first state and the second state.

Further referring toFIGS.16and17, in one embodiment of the present disclosure, the first part61is fixed to the folding portion81through a first adhesive50; in the second state, in the first direction D1, the projection of at least a part of the extension part62does not overlap with the projection of the first adhesive50. In this way, in the second state, at least a part of the region between the extension part62and the first release film31surrounding the first light-transmitting region90is not filled with the first adhesive50. In a case that the space between the extension part62and the first release film31is completely filled with the first adhesive50, the operator is required to apply considerable force to separate the extension part62from the first release film31in a case of switching the second state of the light-emitting module to the first state, which compromises the efficiency of quality inspection. Therefore, in one embodiment of the present disclosure, in the second state, the projection of at least a part of the extension part62does not overlap with the first adhesive50, the operator can easily apply an upward pulling force to the extension part62when performing quality inspection on the electrical connection region A1, which is conductive to improving the operational convenience of switching from the second state of the light-emitting module to the first state.

FIGS.18and19illustrate structural schematic diagrams of a light-emitting module providing with a tearing portion60, which correspond to the first state and the second state of the light-emitting module respectively. Reference is made toFIGS.18and19, in one embodiment of the present disclosure, in the second state, the first adhesive50and a part of the first release film31surrounding the first light-transmitting region90are overlapped in the first direction D1.

In one embodiment of the present disclosure, when the tearing portion60and the first release film31on the light-shielding closure80are fixed by the first adhesive50, in addition to the first adhesive50between the first part61and the first release film31, the first adhesive50is further extended towards the direction of the extension part62. In this way, when quality inspection is not required, the light-emitting module is in the second state. In this case, the first adhesive50can fix at least part of the extension part62to the first release film31surrounding the first light-transmitting region90. This part of the first adhesive50is equivalent to fixing the light-shielding closure80to eliminate the problem that the electrical connection region A1 would be visible if the light-shielding closure80were folded in the second state, which is beneficial to preventing the light leakage problem caused by folding the light-shielding closure80accidentally when quality inspection is not required.

The above embodiment shows the manner of fixing the light-shielding closure80through the first adhesive50in the second state. In some other embodiments of the present disclosure, other feasible manner can be configured to fix the light-shielding closure80. Reference is made toFIGS.20and21.FIGS.20and21illustrate diagrams of relative positional relationships of the tearing portion and the fixing adhesive film30according to the embodiment of the present disclosure, respectively corresponding to the first state and the second state of the light-emitting module. In one embodiment of the present disclosure, the fixing adhesive film30surrounding the first light-transmitting region90includes a first slit F1. In the first direction D1, the first slit F1 at least runs through the fixing adhesive film30. In the second state, the extension part62is inserted into the first slit F1.

This embodiment shows another solution for fixing the light-shielding closure80. A first slit F1 is formed on the fixing adhesive film30on the periphery of the first light-transmitting region90. In the second state, the first slit F1 is located on the side of the first part61facing the extension part62, i.e., the first slit F1 is located in the extending direction of the extension part62away from the first part61. In the first direction D1, the first slit F1 runs through all layers of the fixing adhesive film30. Reference is made toFIGS.1and2, generally, the electrical connection region A1 formed by the backlight module10and the first circuit board20is located in the non-edge region of the first circuit board20. When the first surface M1 is covered by the fixing adhesive film30, the edge region of the fixing adhesive film30is fixed to the edge region of the first surface M1. At the middle position of the first surface M1, the fixing adhesive film30is not adhered to the first surface M1. Therefore, when the extension part62descends and runs through the first slit F1 in the second state, a terminal of the extension part62may further insert into the space between the fixing adhesive film30and the first surface M1, to reliably fixe the light-shielding closure80, which is beneficial to eliminating the problem that the electrical connection region A1 would be visible if the light-shielding closure80were folded in the second state, to prevent the light leakage problem caused by folding the light-shielding closure80accidentally when quality inspection is not required.

In a case of fixing the light-shielding closure80by configuring the first slit F1 with the extension part62, the first adhesive50between the tearing portion60and the light-shielding closure80only needs to be disposed between the first part61and the light-shielding closure80, which does not need to extend further toward the extension part62. In order to improve the fixing reliability of the light-shielding closure80in the second state, the first adhesive50may further be partially extended towards the extension part62. The fixing effect between the first adhesive50and the first release film31on the periphery of the first light-transmitting region90and the cooperation between the extension part62and the first slit F1 are beneficial to further improving the fixing reliability of the light-shielding closure80.

Reference is made toFIGS.20and21, in one embodiment of the present disclosure, the width S of the first slit F1 is greater than or equal to the thickness of the extension part62, and the width S is less than or equal to 0.3 mm.

In one embodiment of the present disclosure, the width of the first slit F1 is set to be greater than the thickness of the extension part62, which can facilitate the insertion of the extension part62into the first slit F1. In one embodiment, the width of the first slit F1 is less than or equal to 0.3 mm. For example, the width of the first slit F1 may be selected as 0.2 mm or 0.1 mm, which is beneficial to eliminating the problem that the electromagnetic shielding effect of the fixing adhesive film30is deteriorated due to the excessive width of the first slit F1.

Reference is made toFIG.20andFIG.21. In one embodiment of the present disclosure, electronic component(s) is/are located on the first surface M1 of the first circuit board20. The first slit F1 does not overlap with the projection of the electronic components in the first direction D1. When the first slit F1 is formed on the fixing adhesive film30, the first slit F1 is arranged to avoid the electronic component(s) on the fixing adhesive film30in the embodiment, and the electronic component(s) on the first circuit board20may be covered by the fixing adhesive film30, preventing the electronic components on the first circuit board20from being affected by electromagnetic radiation, to improve the stability of the first circuit board20.

FIG.22is a schematic structural diagram of a display device according to an embodiment of the present disclosure.FIG.23is a cross-sectional view of the display device shown inFIG.22through CC direction. Reference is made toFIGS.22and23, based on the embodiments, a display device is provided according to an embodiment of the present disclosure. The display device200includes the light-emitting module100according to any one of the above embodiments. The display device further includes a display panel300. The display panel is located on the light-emitting surface of the light-emitting module100. In the light-emitting module100, the second circuit board12is a flexible circuit board. After the second circuit board12is electrically connected to the first circuit board20, the first circuit board20is driven to be folded to the back of the backlight module, to realize a display device with a narrow and lower frame. In one embodiment, the display panel300is bound to a flexible circuit board14and is electrically connected to a third circuit board13through the flexible circuit board14. The third circuit board13is a PCB board, and the flexible circuit board14drives the third circuit board13to be folded to the back of the backlight module, to achieve the display device with the narrow and lower frame.FIG.23is a solution in which the light-emitting module and the display panel are connected to different PCB boards. In some embodiments of the present disclosure, the light-emitting module and the display panel may be connected to the same PCB board, which is not specifically limited in the present disclosure.

The display device200according to embodiments of the present disclosure may be a touch screen, a mobile phone, a tablet computer, a notebook computer, an electronic book or a television, or any other electronic device with a display function. The display device200according to embodiments of the present disclosure has beneficial effects of the display panel100according to the embodiment of the present disclosure. Reference may be made to the specific description of the display panel100in the above embodiments, which may not be repeated herein.

FIG.22only illustrates one shape of the display device200by showing a rounded rectangular structure as an example. In some other embodiments, the display device200may be rectangle, circle, ellipse or any other feasible shape, which is not specifically limited by the present disclosure.

Based on the above embodiments, according to the present disclosure, the light-emitting module and display device at least achieve the following beneficial effects when comparing with conventional technology.

In the light-emitting module and display device of the present disclosure, the light-emitting module includes a backlight module and a first circuit board electrically connected to the backlight module, where the second electrical connection terminal on the second circuit board in the backlight module is electrically connected to the first electrical connection terminal on the first circuit board to form an electrical connection region. The light-emitting module further includes a fixing adhesive film covering the first circuit board. The fixing adhesive film has an electromagnetic shielding function to prevent the first circuit board from being interfered by the external signal. The first circuit board is configured to provide the electrical signal to the backlight module, and the reliability of the electrical connection of the electrical connection region directly determines the light-emitting effect of the backlight module. According to the present disclosure, the fixing adhesive film includes a first light-transmitting region corresponding to the electrical connection region. In the first state, the electrical connection region is visible through the first light-transmitting region. In this way, the quality inspection of the state of the above-mentioned electrical connection region can be implemented through visual inspection. Compared with the method in the related technology that cannot conduct quality inspection of the electrical connection region, it is beneficial to improving the efficiency of quality inspection for products and effectively reducing the probability of missed inspections.

Although some specific embodiments of the present disclosure have been described in detail through examples, the above embodiments are only for illustration and are not intended to limit the scope of the present disclosure. The above embodiments can be modified without departing from the embodiments of the present disclosure. The scope of the present disclosure is defined by the appended claims.