Display module, spliced screen and display device

Abstract

This disclosure provides at least one embodiment of a display module, a splicing screen, and a display device. The display module includes a backlight component and a display component. The backlight component includes a mid-frame and a back panel. The mid-frame includes a first support portion configured to support the display component and extending in a first direction, and a second support portion supported on the back panel and extending in a second direction, the first direction and the second direction intersecting. The first support portion includes a light-shielding portion, and the second support portion is formed of a light-transmitting material. This display module makes the first support portion include a light-shielding portion and the second support portion is formed of a light-transmitting material, thereby reducing the obstruction of light emitted from the backlight by the mid-frame while ensuring the strength and straightness of the mid-frame. This avoids problems such as dark frames, obstruction of edge pixels, and increased dark areas due to the increased width of the splicing screen edges.

Description

Technical Field

[0001] Embodiments of this disclosure relate to a display module, a video wall, and a display device. Background Technology

[0002] The application of display devices formed by splicing screens is becoming increasingly widespread. These devices are typically composed of multiple independent display modules. Each display module usually includes a display component and a backlight component. The display component mainly includes the display panel and optical films, while the backlight component mainly includes a mid-frame, a light source, and a back panel. The mid-frame, part of the backlight component, is located on one side of the display component. It has a support platform to support the display component and an area to accommodate optical films such as light guide plates, diffusers, and reflectors. The support platform is connected and fixed to the non-display area of ​​the display component using adhesive. The mid-frame is located on the outer perimeter of the back panel's base plate, and its surface is mirror-polished. Its main function is to reflect light emitted by the LEDs and support the optical films. The back panel supports the mid-frame. The light source consists of multiple LEDs arranged in an array on the back panel's base plate. The LEDs primarily provide backlight. The optical films are located above the light source and are mainly used to process the emitted light to improve the uniformity of the displayed image. Summary of the Invention

[0003] At least one embodiment of this disclosure provides a display module, a splicing screen, and a display device. The display module changes the structural design of the middle frame, such that the middle frame includes a first support portion supporting the display component and extending in a first direction, and a second support portion supported on a back plate and extending in a second direction. The first support portion includes a light-shielding portion, and the second support portion is formed of a light-transmitting material. This reduces the obstruction of light emitted from the backlight by the middle frame while ensuring the strength and straightness of the middle frame, thereby avoiding problems such as dark frames, obstruction of edge pixels, and increased dark areas due to the increased width of the splicing screen edges.

[0004] At least one embodiment of this disclosure provides a display module including a backlight component and a display component. The backlight component includes a mid-frame and a back panel. The mid-frame includes a first support portion configured to support the display component and extending in a first direction, and a second support portion supported on the back panel and extending in a second direction, wherein the first direction and the second direction intersect. The first support portion includes a light-shielding portion, and the second support portion is formed of a light-transmitting material.

[0005] For example, in a display module provided in at least one embodiment of this disclosure, the first support portion further includes a light-transmitting portion that wraps around the light-shielding portion, and the light-transmitting portion and the second support portion are integrally formed.

[0006] For example, in a display module provided in at least one embodiment of this disclosure, in the first direction, the average length of the light-shielding portion is 1 / 4 to 2 / 3 of the sum of the average lengths of the corresponding light-transmitting portion and the light-shielding portion.

[0007] For example, in a display module provided in at least one embodiment of this disclosure, in the plane defined by the first direction and the second direction, the planar shape of the light-shielding portion includes at least a quadrilateral, the quadrilateral including a first included angle closest to the display component in the second direction and a second included angle furthest from the corresponding edge of the display component in the first direction, the first included angle ranging from 60° to 80° and the second included angle ranging from 45° to 60°.

[0008] For example, in the display module provided in at least one embodiment of this disclosure, the first included angle is 75° and the second included angle is 55°, or the first included angle is 64° and the second included angle is 49°.

[0009] For example, in a display module provided in at least one embodiment of this disclosure, the material of the light-shielding portion includes aluminum metal, and the light-transmitting material includes polycarbonate, polystyrene, or polymethyl methacrylate doped with diffusion particles.

[0010] For example, in a display module provided in at least one embodiment of this disclosure, the display component includes a diffuser plate, an optical film layer, and a display panel that are stacked sequentially.

[0011] For example, in a display module provided in at least one embodiment of this disclosure, the material of the diffuser plate includes at least one of polystyrene and polycarbonate; the optical film layer includes a prism film and a diffuser film stacked together; the display panel includes an array substrate and a color filter substrate disposed opposite to each other, and a liquid crystal layer sandwiched between the array substrate and the color filter substrate.

[0012] For example, in a display module provided in at least one embodiment of this disclosure, the back panel and the middle frame are fixed by snap-fitting or locking, and a reflective film and a light source structure are provided inside the back panel.

[0013] For example, in a display module provided in at least one embodiment of this disclosure, the back panel includes a bottom plate and a side plate, and a light source structure is provided on the bottom plate.

[0014] For example, in the display module provided in at least one embodiment of this disclosure, the light source structure is a light-emitting diode device, and a refractive lens structure or a reflective lens structure is provided on the light-emitting side of the light-emitting diode device.

[0015] For example, in a display module provided in at least one embodiment of this disclosure, the light source structure is encapsulated by an encapsulation structure to form an encapsulation chip, the encapsulation chip is disposed on a substrate, and the light-emitting surface of the encapsulation chip is provided with phosphor.

[0016] For example, in a display module provided in at least one embodiment of this disclosure, a plurality of electrode structures are disposed between the packaged chip and the substrate, and there are gaps between the plurality of electrode structures.

[0017] For example, in the display module provided in at least one embodiment of this disclosure, there are multiple light source structures, and the light source structure includes a first light source structure, a second light source structure, and a third light source structure that are adjacent to each other in the first direction and sequentially away from the first edge of the display component. The distance between the first light source structure and the first edge of the display component is a first distance D1, the distance between the first light source structure and the second light source structure is a second distance D2, and the distance between the second light source structure and the third light source structure is a third distance D3. The first distance D1 is less than the second distance D2, and the second distance D2 is less than or equal to the third distance D3.

[0018] For example, in a display module provided in at least one embodiment of this disclosure, in the first direction, the closer the region from the first edge of the display component to the center of the display component is to the first edge, the smaller the spacing between adjacent light source structures.

[0019] For example, in a display module provided in at least one embodiment of this disclosure, the first pitch D1 is 1 / 2 to 2 / 3 of the second pitch D2.

[0020] For example, in a display module provided in at least one embodiment of this disclosure, the second support portion bends and extends in the second direction. The second support portion includes at least a first extension portion, a second extension portion, a third extension portion, and a fourth extension portion arranged sequentially. The first extension portion is connected to the first support portion. The portion where the second extension portion and the third extension portion are connected is recessed towards the edge of the display component. The fourth extension portion is connected to the back plate, and the light source structure is provided on the third extension portion.

[0021] At least one embodiment of this disclosure also provides a video wall, which includes a plurality of display modules as described in any of the above embodiments, wherein the video wall is formed by splicing together the plurality of display modules.

[0022] At least one embodiment of this disclosure also provides a display device, which includes the splicing screen described in any of the preceding claims. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this disclosure and are not intended to limit this disclosure.

[0024] Figure 1 A schematic diagram of the cross-sectional structure of a display module included in a video wall;

[0025] Figure 2 This is a schematic diagram of the cross-sectional structure of a display module included in another type of splicing screen;

[0026] Figure 3 This is a schematic diagram of a planar structure of a video wall provided in at least one embodiment of the present disclosure;

[0027] Figure 4 A cross-sectional structural diagram of a display module included in a video wall, provided for at least one embodiment of this disclosure;

[0028] Figure 5 A cross-sectional structural schematic diagram of a portion of a mid-frame and a display component provided for at least one embodiment of this disclosure;

[0029] Figure 6 A cross-sectional structural schematic diagram of a portion of a mid-frame and a display component provided for at least one embodiment of the present disclosure;

[0030] Figure 7 A cross-sectional structural schematic diagram of a portion of a mid-frame and a display component provided for at least one embodiment of this disclosure;

[0031] Figure 8 A cross-sectional structural diagram of a light source structure with a refractive lens disposed on it, provided for at least one embodiment of the present disclosure;

[0032] Figure 9 A cross-sectional structural diagram of a light source structure with a reflective lens disposed on it, provided for at least one embodiment of the present disclosure;

[0033] Figure 10 The present disclosure provides, in at least one embodiment, a light intensity-viewing angle curve of light emitted by a light-emitting diode after passing through a reflective lens and a refractive lens, respectively;

[0034] Figure 11 A schematic diagram of the cross-sectional structure of a packaged chip formed by encapsulating a light source structure provided in at least one embodiment of this disclosure;

[0035] Figure 12 for Figure 11 The light intensity-viewing angle curve of the packaged chip is shown.

[0036] Figure 13This is a schematic diagram of a cross-sectional structure of a display module provided in at least one embodiment of the present disclosure;

[0037] Figure 14 A cross-sectional structural schematic diagram of another display module provided in at least one embodiment of the present disclosure;

[0038] Figure 15 It is a type of video wall display;

[0039] Figure 16 A display screen for a video wall is provided in at least one embodiment of this disclosure; and

[0040] Figure 17 A block diagram of a display device provided for at least one embodiment of the present disclosure. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0042] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0043] Borderless or narrow-bezel displays have become a trend in the display industry due to their ability to provide users with a more immersive visual experience. Especially in the field of video wall technology, the width of the bezel of a single display module directly affects the width of the seams in the resulting video wall, thus impacting the overall display effect. Therefore, video walls have higher requirements for bezel width; the display modules forming the video wall need to have narrower bezels. Otherwise, issues such as the middle frame blocking light leading to a dark frame, edge pixels being obstructed causing increased edge darkness, multiple display modules being spliced ​​together doubling the width of the dark frame, further exacerbating edge darkness, and a deterioration in the overall splicing effect may occur.

[0044] For example, Figure 1 This is a schematic diagram of the cross-sectional structure of a display module included in a video wall. Figure 2 This is a schematic diagram of the cross-sectional structure of a display module included in another type of splicing screen, such as... Figure 1 and Figure 2 As shown, the display module 100 includes a mid-frame 101, a diffuser plate 102, an optical film layer 103, a display panel 104, a front frame 105, and an adhesive 106 for bonding the front frame 105 and the display panel 104. For example, as Figure 1 As shown, from the backlight ( Figure 1 Light emitted (not shown) enters from the surface of the middle frame 101, passes through the diffuser plate 102 and the optical film layer 103, and then is transmitted to the edge of the display panel 104. However, no light exits from the upper side of the middle frame 101 corresponding to area A; that is, no light exits from the area of ​​the middle frame 101 supporting the diffuser plate 102. This causes a dark frame on the diffuser plate 102 in this area, resulting in a darkened appearance in that area. For example, as... Figure 2 As shown, because the horizontal distance between the edge of the support surface of the middle frame 101 that supports the display panel 104, which is away from the center of the display panel, and the display area is less than or equal to 0.1mm, when misalignment occurs during the assembly of the display components and backlight components in the process of manufacturing the display device, the support surface of the middle frame 101 that supports the display panel 104 will enter the display area. This prevents light emitted from the backlight from reaching this support surface area, resulting in the problem of edge pixels being blocked. Since there are currently dark frames and edge pixel blocking issues around a single display module, when multiple display modules are actually spliced ​​together to form a splicing screen, the width of the dark frame will double, meaning the widths of the dark frames at the edges of two display modules will overlap. This results in an increased dark area at the edges of the splicing screen, leading to a deterioration in the splicing effect.

[0045] The inventors of this disclosure have noted that by changing the structural design of the mid-frame included in the display module, such that the mid-frame includes a first support portion supporting the display component and extending in a first direction, and a second support portion supported on the back plate and extending in a second direction, and such that the first support portion includes a light-shielding portion, and the second support portion is formed of a light-transmitting material, the obstruction of light emitted from the backlight by the mid-frame can be reduced while ensuring the strength and straightness of the mid-frame, thereby avoiding the problems of dark frames, obstruction of edge pixels, and increased dark areas caused by the increased edge width of the splicing screen.

[0046] It should be noted that the mid-frame is strong, which ensures that it can support the display components supported on it; the mid-frame is also very straight, which ensures that there are no protrusions on the surface of the mid-frame, and therefore no protrusions will block or scatter the light emitted from the backlight.

[0047] At least one embodiment of this disclosure provides a video wall, for example... Figure 3 This is a schematic diagram of a planar structure of a video wall provided in at least one embodiment of the present disclosure, such as... Figure 3 As shown, the video wall 300 includes multiple display modules 200 connected in sequence, although Figure 3 The image shows a splicing screen 300 consisting of nine display modules 200 joined together. However, the embodiments disclosed herein are not limited to this and may include other numbers of display modules 200, such as two, four, six, or twelve. Multiple display modules 200 are spliced ​​together, with seams between any two adjacent display modules 200. In some examples, the display module 200 may be a liquid crystal display module, an organic light-emitting diode (OLED) display module, or an electrophoretic display module. In the following embodiments, a liquid crystal display module is used as an example for illustration.

[0048] For example, Figure 4 This is a cross-sectional structural diagram of a display module included in a video wall, provided in at least one embodiment of the present disclosure, as shown below. Figure 4 As shown, each display module 200 includes a backlight component 201 and a display component 202. The backlight component 201 includes a middle frame 2011 and a back panel 2012. The middle frame 2011 includes a first support portion 2011a configured to support the display component 202 and extending in a first direction X, and a second support portion 2011b supported on the back panel 2012 and extending in a second direction Y. The first direction X and the second direction Y intersect. The first support portion 2011a includes a light-shielding portion 20111, and the second support portion 2011b is formed of a light-transmitting material.

[0049] For example, such as Figure 4As shown, the display module 200 also includes a light source structure 203 and a reflective film 204, and the display component 202 includes a diffuser plate 2021, an optical film layer 2022, and a display panel 2023. The relevant structures and functions of the light source structure 203, the reflective film 204, the diffuser plate 2021, the optical film layer 2022, and the display panel 2023 are described in detail below.

[0050] For example, light-emitting diodes are usually used as the light source structure. Since the light emitted by light-emitting diodes has strong directionality, in order for the light emitted by light-emitting diodes to be uniformly mixed and form a uniform surface light source, the diffuser plate 2021 set above the light-emitting diodes needs to maintain a sufficient distance from these light-emitting diodes. Therefore, the diffuser plate 2021 needs to be set on the side of the bottom plate of the middle frame 2011 away from the back plate 2012.

[0051] For example, such as Figure 4 As shown, the first support portion 2011a also includes a light-transmitting portion 20112 that encloses the light-shielding portion 20111. The light-transmitting portion 20112 and the second support portion 2011b are integrally formed, meaning they are made of the same material and formed in the same process step. This reduces the types of materials used to form the first support portion 2011a and the second support portion 2011b, and also improves the straightness of the middle frame 2011. Furthermore, the integral forming of the light-transmitting portion 20112 and the second support portion 2011b creates a structure that fills the gaps in the light-shielding portion 20111, resulting in greater overall strength and stability of the middle frame 2011. Setting the light-shielding portion 20111, made of aluminum, to be enclosed within the light-transmitting portion 20112 further increases the strength of the middle frame 2011.

[0052] For example, such as Figure 4 As shown, the light-transmitting part 20112 and the second support part 2011b are integrally formed from light-transmitting material through injection molding, which can also improve the phenomenon of dark frame caused by the middle frame part at the edge of the display module blocking light. That is, the part supporting the display component 202 and the part including the light-shielding part 20111 are formed by injection molding, and the injection molding part and the light-shielding part 20111 are combined by injection molding. During the injection molding process, the injection molding part can wrap the light-shielding part 20111 to form an integral structure.

[0053] For example, in one example, the light-transmitting portion 20112 and the second support portion 2011b formed by injection molding can allow light emitted from the backlight structure to first enter the second support portion 2011b and then enter the light-transmitting portion 20112 of the first support portion 2011a included in the support display component 202, thereby improving the uniformity of the edge image quality of the display module.

[0054] For example, in one example, the materials of the light-transmitting portion 20112 and the second support portion 2011b are both light-transmitting materials, which may include transparent materials with a certain strength after curing, such as polycarbonate, polystyrene, or polymethyl methacrylate doped with diffusion particles.

[0055] For example, in one example, the back plate 2012 is the overall support structure for the light source structure 203. The back plate 2012 is fixed to the middle frame 2011 by snap-fit ​​or locking. The reflective film 204 and the light source structure 203 are attached to the inside of the back plate 2012. The material of the back plate 2012 includes at least one of electro-galvanized steel sheet (SECC) and hot-dip galvanized steel sheet (SGCC).

[0056] For example, the light-passing surface of the middle frame 2011 has a light-scattering effect, which is called the scattering surface. There is a slope surface with a certain tilt angle between the scattering surface of the middle frame 2011 and the optical film layer 2022. The function of this slope surface is to scatter the light emitted by the light source structure at the edge position. That is, the light emitted by the light source structure at the edge position will be scattered after passing through the slope surface of the middle frame 2011, making it easier for this part of the light to reach the display area of ​​the display panel, so as to reduce the phenomenon of dark frame.

[0057] For example, such as Figure 4 As shown, the surface of the second support portion 2011b has a scattering and reflecting function. When light enters the scattering and reflecting surface, it will be scattered, so that the light is dispersed and enters the display component more evenly. In one example, the surface of the second support portion 2011b is attached with a high scattering and reflecting film with scattering particles to form the scattering and reflecting surface, and the surface of the scattering and reflecting surface is a matte finish.

[0058] For example, in another embodiment, the surface of the second support 2011b is attached with a reflective surface, and the surface of the reflective surface is attached with a dot layer to form the scattering reflective surface.

[0059] For example, Figure 5 A cross-sectional structural diagram of a portion of a mid-frame and a display component provided for at least one embodiment of this disclosure, as shown below. Figure 5As shown, in the area surrounded by the light-transmitting portion 20112, the size of the light-shielding portion 20111 varies in the first direction X. The average length of the light-shielding portion 20111 in the first direction X is 1 / 4 to 2 / 3 of the sum of the average lengths of the corresponding light-transmitting portion 20112 and the light-shielding portion 20111 in the first direction X. For example, excluding the portion of the light-shielding portion 20111 that extends out of the area surrounded by the light-transmitting portion 20112, the cross-sectional shape of the main body of the light-shielding portion 20111 is trapezoidal or trapezoidal. Along the second direction Y, the closer to the bottom plate of the back plate 2012, the greater the length of the light-shielding portion 20111 in the first direction X.

[0060] For example, in one example, the average length of the light-shielding portion 20111 in the first direction X is 1 / 4, 1 / 3, 1 / 2 or 2 / 3 of the sum of the average lengths of the corresponding light-transmitting portion 20112 and the light-shielding portion 20111 in the first direction X, and the embodiments of this disclosure do not limit this.

[0061] For example, such as Figure 5 As shown, the portion of the light-transmitting portion 20112 extending beyond the light-shielding portion 20111 in the second direction Y is used to support the optical film layer 2022 and is in contact with the optical film layer 2022. When the light emitted by the backlight structure shines on the portion of the light-transmitting portion 20112 extending beyond the light-shielding portion 20111 in the second direction Y, the light can still reach the display panel, so that there will be no problem of edge pixels being blocked.

[0062] For example, in one example, the material of the optical film layer 2022 is polyethylene terephthalate. The optical film layer 2022 includes a prism film and a diffusion film stacked together. The prism film is configured to converge light to improve the overall brightness of the display module, and the diffusion film is used to make the light emitted by the light source structure more uniform.

[0063] For example, combining Figure 4 The display component 202 includes a diffuser plate 2021, an optical film layer 2022, and a display panel 2023, which are stacked sequentially on the base plate of the back plate 2012.

[0064] For example, in one instance, the diffuser plate 2021 is made of at least one of polystyrene and polycarbonate. The main function of the diffuser plate 2021 is to make the light emitted by the light source structure more uniform, so as to form a uniform surface light source.

[0065] For example, the display panel 2023 includes an array substrate and a color filter substrate disposed opposite to each other, and a liquid crystal layer sandwiched between the array substrate and the color filter substrate. That is, the display panel is a liquid crystal display panel. The structure of the liquid crystal display panel can refer to conventional designs. For example, the array substrate is provided with switching elements (e.g., thin film transistors) connected by mutually orthogonal source wiring and gate wiring, pixel electrodes connected to the switching transistors, and alignment films, etc. The color filter substrate is provided with color filters of various colors such as red, green and blue, black matrices that separate the color filters, and alignment films, etc. Polarizing plates are also provided on the outer sides of the array substrate and the color filter substrate, respectively.

[0066] For example, such as Figure 4 As shown, the back panel 2012 is fixed to the middle frame 2011 by snap-fitting or locking, meaning the back panel 2012 and the middle frame 2011 are detachably connected. This allows for more space to accommodate the reflective film, diffuser plate, optical film layer, and display panel during assembly, and also allows for more flexible adjustment of the aforementioned structure during installation. The reflective film and light source structure are located inside the back panel 2012.

[0067] For example, such as Figure 4 As shown, in one example, the back plate 2012 includes a base plate 2012a and a side plate 2012b. The reflective film 204 and the light source structure 203 are disposed on the base plate 2012a. The reflective film 204 is disposed between the base plate 2012a and the light source structure 203. The reflective film 204 can homogenize the light emitted from the light source structure 203.

[0068] For example, Figure 6 A cross-sectional structural schematic diagram of a portion of a mid-frame and display component provided for at least one embodiment of this disclosure, for example, as shown below. Figure 6 As shown, the width of the edge of the light-shielding portion 20111 near the display component 202 can be reduced to decrease the obstruction of light emitted from the light source structure by the light-shielding portion 20111. For example, the size of the support surface of the upper part of the light-shielding portion 20111 can be reduced by 60%, while the slope angle remains unchanged. For example, in one example, the size of the support surface of the upper part of the light-shielding portion 20111 is reduced from 5mm to 2mm. For example, while ensuring the strength of the middle frame 2011, reducing the width of the support surface of the upper part of the light-shielding portion 20111 can increase the amount of light incident on the display panel, thereby improving the brightness of the display module edge.

[0069] For example, Figure 7 A cross-sectional structural schematic diagram of a portion of a mid-frame and display component provided for at least one embodiment of this disclosure, for example, as shown below. Figure 7As shown, in the plane defined by the first direction X and the second direction Y, the planar shape of the light-shielding portion 20112 includes at least a quadrilateral ABCD. The quadrilateral ABCD includes a first included angle α1 closest to the display component 202 in the second direction Y, and a second included angle α2 furthest from the corresponding edge of the display component 202 in the first direction X. The range of the first included angle α1 is 60° to 80°, and the range of the second included angle α2 is 45° to 60°. Designing the first included angle α1 and the second included angle α2 to be within the above range allows more light to enter the area at the edge of the display module through reflection from the tilt angle of the side of the middle frame 2011, thereby improving the brightness of the edge of the display module.

[0070] For example, in one example, the first included angle α1 is 75° and the second included angle α2 is 55°; in another example, the first included angle α1 is 64° and the second included angle α2 is 49°.

[0071] For example, such as Figure 7 As shown, in one example, the first included angle α1 is designed to be 64°, the second included angle α2 is designed to be 49°, and the width of the support surface of the upper part of the light-shielding part 20111 is designed to be 4.2mm (that is, reduced by 0.8mm compared to the original design). Through the reflection of the tilt angle of the side of the middle frame 2011, more light can enter the area of ​​the edge of the display module to improve the brightness of the edge of the display module. Figure 7 The design in this module can increase brightness by at least 30% compared to conventional designs.

[0072] For example, in one example, the light source structure 203 can be a light-emitting diode, and a refractive lens structure or a reflective lens structure is provided on the light-emitting side of the light-emitting diode.

[0073] For example, Figure 8 This is a schematic cross-sectional view of a light source structure with a refractive lens provided in at least one embodiment of the present disclosure. The principle of the refractive lens is that the light emitted by the light-emitting diode is refracted after passing through the inner wall of the refractive lens, and the angle of the emitted light is deflected, thereby increasing the viewing angle of the light emitted by the light source structure. The emission angle of a typical light-emitting diode is 120 degrees, for example, as shown... Figure 8 As shown, by setting a refractive lens structure above the light-emitting diode, the light emission angle of the light source structure can be further improved. For example, the light emitted by the light-emitting diode can be increased to about 160 degrees after passing through the refractive lens structure. This can increase the angle range of the light emitted from the light source structure, reduce the obstruction of the light emitted from the light source structure by the middle frame, and avoid the problems of dark frames, edge pixels being blocked, and dark areas being aggravated due to the increased edge width of the splicing screen.

[0074] For example, the light-incident surface of the lens structure has a large radius of curvature, which makes the light emitted from the light source structure more diffuse and can improve the light emission uniformity of the backlight component. This means that the distance between adjacent light-emitting diodes can be set larger, so as to effectively reduce the number of light-emitting diodes and reduce the production cost of the splicing screen.

[0075] It should be noted that the emission angle is defined as the angle at which the emission intensity is half of the peak intensity.

[0076] For example, Figure 9 This is a schematic cross-sectional view of a light source structure with a reflective lens provided in at least one embodiment of the present disclosure. The principle of the reflective lens is that light emitted from the light source structure at a small angle (e.g., 0-45 degrees) undergoes a first reflection after passing through the inner wall of the reflective lens. This partially reflected light then enters the reflective film for a second reflection. After two reflections, the light exits, thereby increasing the emission angle of the light-emitting diode (LED). Light emitted from the LED at a larger angle (45-90 degrees) is refracted after passing through the inner wall of the reflective lens, causing the angle of the outgoing light to deflect. Since all small-angle light is reflected, the brightness directly above the LED decreases, and the emission angle of the LED increases. Therefore, the emission angle of the light source structure after passing through the reflective lens is even larger, and the emission angle of the light emitted by the LED can be increased to about 170 degrees.

[0077] For example, Figure 10 The light intensity-viewing angle curves of light emitted by a light-emitting diode after passing through a reflective lens and a refractive lens, as provided in at least one embodiment of this disclosure, are as follows: Figure 10 As can be seen, the light emitted by a light-emitting diode (LED) can have its emission angle increased to approximately 160 degrees after passing through a refractive lens structure, and to approximately 170 degrees after passing through a reflective lens structure. By combining LEDs with both reflective and refractive lenses, the uniformity of the image quality at the edges of the display module is improved.

[0078] For example, Figure 11 This is a schematic cross-sectional view of the packaged chip formed by encapsulating the light source structure provided in at least one embodiment of the present disclosure with a packaging structure, as shown below. Figure 11 As shown, the packaged chip 301 is disposed on the substrate 303, and the light-emitting surface of the packaged chip 301 is provided with phosphor 304. For example, as Figure 11 As shown, fluorescent adhesive 304 is provided on the left and right sides of the packaged chip 301. The packaged chip 301 is a light-emitting diode that emits blue light, and the fluorescent adhesive 304 is yellow fluorescent adhesive. In this way, the blue light emitted by the blue light-emitting diode is converted into white light after passing through the yellow fluorescent adhesive 304.

[0079] For example, the material of the fluorescent adhesive 304 includes phosphor materials or quantum dot fluorescent layers. For instance, phosphor materials can improve luminous efficiency, precisely control the wavelength of light emitted by the packaged chip 301, and make the light emitted by the packaged chip 301 softer. Quantum dot materials have the characteristics of narrow emission spectrum, wide color gamut, good stability, long lifespan, and low manufacturing cost.

[0080] For example, such as Figure 11 As shown, multiple electrode structures 302 are provided between the packaged chip 301 and the substrate 303, and there are gaps between the multiple electrode structures 302. This can help dissipate the heat generated by the packaged chip 301 through the gaps, thereby reducing the temperature of the packaged chip and thus having advantages in high current drive and high temperature resistance.

[0081] For example, by covering the side surface of the LED with a phosphor layer and the light-emitting surface of the LED with a light-shielding layer, a chip-scale packaged LED (packaged chip) that emits light only from the sides is formed. That is, the packaged chip 301 is a four-sided emitting (except for the top and bottom surfaces, all other surfaces emit light) chip-scale packaged LED (CSP LED). A chip-scale packaged device is defined as a fully functional packaged device whose package size is no more than 1.2 times the chip size. A CSP LED is an LED that uses CSP packaging technology. The structure of a chip-scale packaged LED involves uniformly wrapping the chip with phosphor adhesive and then mounting the chip-scale packaged device onto a substrate.

[0082] For example, the phosphor layer 304 covers the side of the packaged chip 301, and its thickness is 0–400 μm, which can be adjusted according to the application scenario. For example, there is no gap between the phosphor layer 304 and the packaged chip 301, thus ensuring that the emitted light is uniform and improving product yield. The light-shielding layer is used to block the light emitted from the light-emitting surface of the packaged chip 301, and it covers the packaged chip 301 and the phosphor layer, aligning with the edge of the phosphor layer. For example, the thickness of this light-shielding layer is 10–500 μm, and there must also be no gaps, otherwise light leakage will occur.

[0083] For example, the material of this light-shielding layer includes white glue, silicone, or epoxy resin. White glue, for instance, is characterized by good film-forming properties, high bonding strength, fast curing speed, non-toxicity, and low price. Silicone is characterized by high tensile strength, high transparency, non-toxicity, and long lifespan. Epoxy resin is characterized by good insulation properties, good thermal conductivity, high temperature resistance, low temperature resistance, good sealing properties, and simple filling process.

[0084] For example, the packaged chip 301 includes at least one of a blue LED chip, a red LED chip, a green LED chip, and a white LED chip. Depending on the application scenario and the actual requirements for emitted light, different chips can be selected. When white light needs to be emitted, the blue LED chip, the red LED chip, and the green LED chip can emit blue light, red light, and green light respectively to form white light, or a white LED chip can be used directly to emit white light.

[0085] For example, since the top of a chip-scale packaged light-emitting diode does not emit light, there is no problem of uneven light emission between the top and the sides. This can solve the problem of light mixing difficulties that easily occur in display products such as TVs, computer monitors, or mobile phones when the light mixing distance is small, thus improving the light mixing effect and helping to improve the display effect of display products.

[0086] For example, Figure 12 for Figure 11 The light intensity-viewing angle curve of the packaged chip shown is as follows: Figure 12 As shown, the light emission angle of the packaged chip can reach 160 degrees to 170 degrees. Moreover, due to its small size, the chip-scale packaged light-emitting diodes can be arranged more densely, which is beneficial for the arrangement design of light-emitting diodes at the edge. Therefore, the light source structure formed by using chip-scale packaged light-emitting diodes can effectively improve the uniformity of emitted light at the edge.

[0087] For example, because the light emitted by LEDs has a divergence angle, a dark area appears between two adjacent LEDs. This dark area reduces the uniformity of light output from the surface light source provided by the backlight component. Therefore, it is necessary to increase the number of LEDs and shorten the distance between two adjacent LEDs to reduce the area of ​​the dark area. That is, there can be multiple light source structures in a display module. To improve the uniformity of emitted light, multiple light source structures are usually designed to be arranged in an array. For example, Figure 13 This is a schematic cross-sectional view of a display module provided in at least one embodiment of the present disclosure, as shown below. Figure 13As shown, the light source structure 203 includes a first light source structure 203a, a second light source structure 203b, and a third light source structure 203c that are adjacent to and sequentially away from the first edge of the display component 202 in the first direction X. The distance between the first light source structure 203a and the first edge of the display component 202 is a first distance D1, the distance between the first light source structure 203a and the second light source structure 203b is a second distance D2, and the distance between the second light source structure 203b and the third light source structure 203c is a third distance D3. The first distance D1 is less than the second distance D2, and the second distance D2 is less than or equal to the third distance D3. Since the closer to the first edge of the display component 202, the greater the risk of the display area of ​​the display component being blocked, setting the first spacing D1, the second spacing D2, and the third spacing D3 to the above-mentioned size relationship can reduce the spacing between the light source structure 203 closest to the first edge of the display component 202 and the first edge of the display component 202, so that the dark frame area at the edge of the display module can be compensated for brightness, thereby improving the uniformity of the image quality at the edge of the display module. Moreover, while ensuring the uniformity of the brightness of the display component, the number of light source structures 203 can be reduced to lower costs.

[0088] For example, in a direct-lit display module, the light source structures, such as LED strips, are all located on the bottom plate of the back panel. The light from the light source structures of the backlight components is emitted from the bottom plate of the back panel and directly transmitted in a direction perpendicular to the main surface of the display panel. However, due to the limitation of the emission angle of the LEDs and lenses in the light source structure, the LEDs arranged on the bottom plate of the back panel need to be evenly distributed on the bottom plate to ensure uniform light emission. This results in a large number of light source structures, such as LED strips. A large number of LED strips is not conducive to the processing and assembly of the backlight components, is not conducive to saving materials, and increases the processing cost. Therefore, it is necessary to consider adjusting the spacing between adjacent light source structures to reduce the number of light source structures and ensure the uniformity of the brightness of the display components.

[0089] It should be noted that the types and selections of the first light source structure 203a, the second light source structure 203b, and the third light source structure 203c mentioned above can be found in the description of the light source structure 203 above. Multiple light source structures 203 are arranged in an array on the bottom plate of the backplate. Figure 13 Only the multiple light source structures 203 arranged adjacent to each other in the first direction X are shown.

[0090] It should also be noted that the first edge of the display component refers to the edge of the display component that is closest to the described light source structure. For example, when describing... Figure 13 When referring to the leftmost light source structure 203, i.e., the first light source structure 203a, the first edge of the display component refers to the leftmost edge of the display component. Figure 13When the light source structure 203 (not shown on the far right) is shown, the first edge of the display component refers to the far right edge of the display component.

[0091] For example, when the first pitch D1, the second pitch D2, and the third pitch D3 are all equal, and the distance from the first edge of the display component 202 is less than or equal to 70mm, the illuminance of the light source structure 203 will be relatively low, resulting in a dark frame phenomenon at the edge of the display component 202. When the first pitch D1 is designed to be smaller than the second pitch D2, and the second pitch D2 is designed to be smaller than or equal to the third pitch D3, the dark frame area at the first edge of the display component can be compensated for in terms of brightness, thereby improving the uniformity of the image quality at the edge of the display module.

[0092] For example, such as Figure 13 As shown, in the first direction X, from the first edge of the display component 202 to the center of the display component 202, the closer the distance to the first edge of the display component 202, the smaller the spacing between adjacent light source structures 203. That is, the arrangement density of light source structures at the edge of the bottom plate of the back plate 2012 is greater than the arrangement density of light source structures in the middle region of the bottom plate of the back plate 2012. This can further reduce the number of light source structures and reduce costs while ensuring uniform brightness of the display component.

[0093] For example, in one example, the first spacing D1 is 1 / 2 to 2 / 3 of the second spacing D2. By setting the ratio of the first spacing D1 and the second spacing D2 to the above range, the distance between the light source structure closest to the first edge and the first edge can be reduced, so that the dark frame area at the edge of the display module can be compensated for in terms of brightness, thereby further improving the uniformity of the image quality at the edge of the display module.

[0094] For example, in one example, the first spacing D1 ranges from 35mm to 45mm, the second spacing D2 ranges from 55mm to 70mm, and the third spacing D3 ranges from 75mm to 90mm.

[0095] For example, in one example, the first spacing D1 is 39mm, the second spacing D2 is 62mm, and the third spacing D3 is 76mm.

[0096] It should be noted that in the splicing screen provided in the embodiments of this disclosure, element A and element B are adjacent, or adjacent elements A and element B means that there are no other elements A and other elements B between elements A and element B, but there may be other elements besides elements A and element B. Element A and element B can be the same element or different elements.

[0097] For example, because splicing screens include multiple display modules that can achieve ultra-narrow bezel designs, the reflective surface of the middle frame usually cannot be perpendicular to the optical film layer. Instead, a space needs to be reserved between the bottom of the middle frame and the back panel. The reflective surface of the middle frame is designed as a sloped surface with a certain angle to the optical film layer. The main function of this sloped surface is to reflect the light emitted by the light source structure located at the edge of the back panel. The slope angle of the middle frame is usually designed to be between 50 and 75 degrees, and the various light source structures in the light source structure are arranged at equal intervals. Because the light source structures at the edge of the display components reflect light on the sloped surface, bright edges appear at the edges of the displayed image. Furthermore, the uniformity of brightness is high in the center of the display screen, but the brightness is low at the edges of the display screen, and there is a transition zone from high brightness to low brightness at the edges of the display screen, resulting in a noticeable black frame at the edges of the display screen, which affects the display screen of the final product. The inventors of this disclosure also noted that the second support part of the middle frame can be designed to be bent and extended, which can improve the brightness at the edges of the display screen and eliminate the transition zone from high brightness to low brightness and the noticeable black frame at the edges of the display screen.

[0098] For example, Figure 14 This is a schematic cross-sectional view of another display module provided in at least one embodiment of the present disclosure, as shown below. Figure 14 As shown, the second support portion 2011b bends and extends in the second direction Y. The second support portion 2011b includes at least a first extension portion 2051, a second extension portion 2052, a third extension portion 2053, and a fourth extension portion 2054 arranged sequentially. The first extension portion 2051 is connected to the first support portion 2011a. The portion where the second extension portion 2052 and the third extension portion 2053 are connected is recessed towards the edge of the display component 202. The fourth extension portion 2054 is connected to the back plate (in... Figure 14 (Not shown in the image) is connected, and a light source structure 203 is provided on the third extension 2053. The light emitted from the light source structure 203 is not reflected by other structures in the middle frame 2011, thereby reducing the area of ​​the blocked part of the display component 203, and further ensuring the uniformity of the display brightness of the display component.

[0099] For example, Figure 15 It is a type of video wall display. Figure 16 This disclosure provides at least one embodiment of a video wall display screen, such as... Figure 15 As shown, it is clearly visible that there is a dark border around the edge of the image displayed on the splicing screen, indicating poor uniformity of the edge image quality and a noticeable dark border at the edge of the displayed image. Figure 16As shown, there are no obvious dark borders around the displayed image of the splicing screen, the edge image quality of the displayed image of the splicing screen is uniform, and the distribution density of scattered points in the displayed image is the same. That is, the design of some embodiments of this disclosure improves the phenomenon of poor edge image quality uniformity of the splicing screen display.

[0100] At least one embodiment of this disclosure also provides a display device, for example, Figure 17 A block diagram of a display device provided in at least one embodiment of this disclosure, such as Figure 17 As shown, the display device 40 includes a plurality of splicing screens 300 provided in any of the above embodiments, which are formed by splicing together a plurality of display modules 200. The display device in the embodiments of this disclosure can be any product or component with display function, such as a monitor, OLED panel, OLED TV, electronic paper, mobile phone, tablet computer, laptop computer, digital photo frame, or navigator.

[0101] The display module, splicing screen, and display device provided in at least one embodiment of this disclosure have at least one of the following beneficial technical effects:

[0102] (1) The display module provided in at least one embodiment of this disclosure changes the structural design of the middle frame so that the middle frame includes a first support portion that supports the display component and extends in a first direction, and a second support portion that is supported on the back plate and extends in a second direction. The first support portion includes a light-shielding portion, and the second support portion is formed of a light-transmitting material. This reduces the obstruction of light emitted from the backlight by the middle frame while ensuring the strength and straightness of the middle frame, thereby avoiding the problems of dark frames, edge pixels being blocked, and dark areas being aggravated due to the increased width of the splicing screen edge.

[0103] (2) In at least one embodiment of the display module provided by this disclosure, the light-transmitting part and the second support part are integrally formed to form a structure that fills the gap of the light-shielding part, which can make the overall strength and stability of the middle frame greater. Setting the light-shielding part formed of aluminum metal to be wrapped in the light-transmitting part can further increase the strength of the middle frame.

[0104] The following points need to be explained:

[0105] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0106] (2) For clarity, the thickness of layers or regions in the drawings used to describe embodiments of the present disclosure is enlarged or reduced, i.e., these drawings are not drawn to actual scale.

[0107] (3) Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0108] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. The scope of protection of this disclosure should be determined by the scope of protection of the claims.

Claims

1. A display module, comprising a backlight component and a display component, wherein, The backlight component includes a mid-frame and a back panel. The mid-frame includes a first support portion configured to support the display component and extending in a first direction, and a second support portion supported on the back panel and extending in a second direction, wherein the first direction and the second direction intersect. The first support includes a light-shielding portion and a light-transmitting portion that wraps around the light-shielding portion; the second support is formed of a light-transmitting material, and the light-transmitting portion and the second support are integrally formed. In the first direction, the average length of the light-blocking portion is 1 / 4 to 2 / 3 of the sum of the average lengths of the corresponding light-transmitting portion and the light-blocking portion; In the plane defined by the first direction and the second direction, the planar shape of the light-shielding portion includes at least a quadrilateral, the quadrilateral including a first included angle closest to the display component in the second direction and a second included angle furthest from the corresponding edge of the display component in the first direction, the first included angle ranging from 60° to 80° and the second included angle ranging from 45° to 60°.

2. The display module according to claim 1, wherein, The first included angle is 75° and the second included angle is 55°, or the first included angle is 64° and the second included angle is 49°.

3. The display module according to claim 1 or 2, wherein, The material of the light-shielding part includes aluminum metal, and the light-transmitting material includes polycarbonate, polystyrene or polymethyl methacrylate doped with diffusion particles.

4. The display module according to claim 3, wherein, The display component includes a diffuser plate, an optical film layer, and a display panel stacked sequentially.

5. The display module according to claim 4, wherein, The diffuser plate is made of at least one of polystyrene and polycarbonate; the optical film layer includes a prism film and a diffuser film stacked together; the display panel includes an array substrate and a color filter substrate disposed opposite to each other, and a liquid crystal layer sandwiched between the array substrate and the color filter substrate.

6. The display module according to claim 1, wherein, The back plate is fixed to the middle frame by snap-fitting or locking, and a reflective film and a light source structure are provided inside the back plate.

7. The display module according to claim 1, wherein, The back plate includes a bottom plate and a side plate, and a light source structure is provided on the bottom plate.

8. The display module according to claim 7, wherein, The light source structure is a light-emitting diode device, and a refractive lens structure or a reflective lens structure is provided on the light-emitting side of the light-emitting diode device.

9. The display module according to claim 7, wherein, The light source structure is encapsulated by an encapsulation structure to form an encapsulated chip, the encapsulated chip is disposed on a substrate, and the light-emitting surface of the encapsulated chip is provided with fluorescent adhesive.

10. The display module according to claim 9, wherein, Multiple electrode structures are disposed between the packaged chip and the substrate, and there are gaps between the multiple electrode structures.

11. The display module according to any one of claims 7 to 10, wherein, The number of light source structures is multiple, and the light source structures include a first light source structure, a second light source structure, and a third light source structure that are adjacent to each other in the first direction and sequentially away from the first edge of the display component. The distance between the first light source structure and the first edge of the display component is a first distance D1, the distance between the first light source structure and the second light source structure is a second distance D2, and the distance between the second light source structure and the third light source structure is a third distance D3. The first distance D1 is less than the second distance D2, and the second distance D2 is less than or equal to the third distance D3.

12. The display module according to claim 11, wherein, In the first direction, the closer to the first edge of the display component to the center of the display component, the smaller the spacing between adjacent light source structures.

13. The display module according to claim 11, wherein, The first spacing D1 is 1 / 2 to 2 / 3 of the second spacing D2.

14. The display module according to claim 12 or 13, wherein, The second support extends in the second direction by bending. The second support includes at least a first extension, a second extension, a third extension and a fourth extension arranged in sequence. The first extension is connected to the first support. The portion where the second extension and the third extension are connected is recessed toward the edge of the display component. The fourth extension is connected to the back plate, and the light source structure is provided on the third extension.

15. A video wall, comprising a plurality of display modules as described in any one of claims 1 to 14, wherein, The splicing screen is formed by splicing together multiple display modules.

16. A display device comprising the video wall as described in claim 15.

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