Backlight module, display module and display device

Abstract

A backlight module (110) comprises a rear housing (10), a light panel (20), a quantum dot film (30), a light shield (40) and an optical film (50). The rear housing (10) comprises a bottom plate (11) and a plurality of side plates (12) arranged around the bottom plate (11), wherein the plurality of side plates (12) are connected to the edges of the bottom plate (11), and the bottom plate (11) and the plurality of side plates (12) enclose an installation cavity (101) having an opening. The light panel (20) is located in the installation cavity (101) and is arranged on the bottom plate (11). The light panel (20) comprises a plurality of light-emitting devices (21) arranged in an array. The quantum dot film (30) is arranged on a side of the light panel (20) away from the bottom plate (11), and the quantum dot film (30) is configured to perform color conversion on at least part of the light emitted by the light panel (20). The plurality of side panels (12) support the quantum dot film (30), so that a first gap exists between the quantum dot film (30) and the light panel (20). The light shielding member (40) includes a fixing portion (41) and a light blocking portion (42); the fixing portion (41) is connected to the plurality of side panels (12), and the light blocking portion (42) abuts against a side of the quantum dot film (30) away from the bottom plate (11), and along the circumference of the quantum dot film (30), the light blocking portion (42) covers the edge of the quantum dot film (30). The optical film (50) is arranged on a side of the light shielding member (40) away from the bottom plate (11), and has a second gap between it and the quantum dot film (30).

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a backlight module, a display module, and a display device. Background Art

[0002] With the advancement of display technology, display devices are becoming more and more popular. Display devices include backlight modules and display panels. Among them, backlight modules increasingly choose micro light emitting diodes (LEDs) as light sources. The light emitted by micro LEDs needs to be processed by other optical devices in the backlight module (such as color conversion and light uniformity) before it can provide uniform and stable white light for the display panel. Currently, improving the light uniformity and stability of the backlight module is an urgent problem to be solved.

[0003] Public content

[0004] In one aspect, a backlight module is provided. The backlight module includes a rear housing, a light panel, a quantum dot film, a light shield, and an optical film. The rear housing includes a bottom plate and a plurality of side panels arranged around the bottom plate. The plurality of side panels are connected to the edges of the bottom plate, and the bottom plate and the plurality of side panels enclose a mounting cavity having an opening. The light panel is located within the mounting cavity and is disposed on the bottom plate. The light panel includes a plurality of light-emitting devices arranged in an array. The quantum dot film is disposed on a side of the light panel away from the bottom plate. The quantum dot film is configured to perform color conversion on at least a portion of the light emitted by the light panel. The plurality of side panels support the quantum dot film, providing a first gap between the quantum dot film and the light panel. The light shield includes a fixing portion and a light-blocking portion. The fixing portion is connected to the plurality of side panels. The light-blocking portion abuts against a side of the quantum dot film away from the bottom plate, and along the circumference of the quantum dot film, the light-blocking portion covers the edge of the quantum dot film. The optical film is disposed on a side of the light shield away from the bottom plate, and is provided with a second gap between the quantum dot film and the light shield.

[0005] In some embodiments, the fixing portion is located on a side of the plurality of side panels away from the mounting cavity. The light shielding member further includes a supporting portion and a connecting portion. The supporting portion is connected to the fixing portion and extends away from the base plate, and is configured to support the optical film. One end of the connecting portion is connected to the supporting portion, and the other end is connected to the light shielding portion.

[0006] In some embodiments, along a direction parallel to the quantum dot film, a portion of the light-blocking portion extends beyond an edge of the quantum dot film, and the connecting portion is connected to the portion of the light-blocking portion extending beyond the edge of the quantum dot film.

[0007] In some embodiments, a surface of the support portion close to the installation cavity is connected to a surface of the connection portion close to the installation cavity, forming an arc surface convex toward a side close to the installation cavity.

[0008] In some embodiments, the backlight module further includes a diffuse reflection layer that covers at least a portion of the surface of the connecting portion and the supporting portion near the installation cavity.

[0009] In some embodiments, the fixing portion is located on a side of the plurality of side plates close to the mounting cavity.

[0010] In some embodiments, the backlight module further includes a support frame. The support frame is disposed around the plurality of side panels and includes a mounting portion, a supporting portion, and an extension portion. The mounting portion is located on a side of the plurality of side panels away from the mounting cavity and is fixedly connected to the plurality of side panels. The supporting portion is connected to the mounting portion and extends away from the base plate, configured to support the optical film. One end of the extension portion is connected to the supporting portion, and the other end abuts against the fixed portion of the light shielding member.

[0011] In some embodiments, at least one side panel includes a first extension section, a second extension section, and a third extension section disposed sequentially in a direction away from the bottom panel, wherein the first extension section, the second extension section, and the third extension section are sequentially connected. The first extension section is connected to an edge of the bottom panel. The second extension section forms a stepped structure with the first extension section to support the quantum dot film. The third extension section extends perpendicular to the bottom panel and away from the bottom panel.

[0012] In some embodiments, the fixing portion is located on a side of the side plate away from the installation cavity, and the fixing portion is fixedly connected to the third extension section.

[0013] In some embodiments, the backlight module further includes a first diffusion plate, which is disposed on a side of the quantum dot film close to the bottom plate, and the plurality of side plates support the first diffusion plate.

[0014] In some embodiments, the quantum dot film is in direct contact with the first diffuser plate, and the light blocking portion presses the quantum dot film against the first diffuser plate.

[0015] In some embodiments, the backlight module further comprises a plurality of support columns, which are disposed between the light board and the first diffusion plate, with one end connected to the light board and the other end contacting a surface of the first diffusion plate close to the light board.

[0016] In some embodiments, the edge width of the light-blocking portion covering the quantum dot film is 1 mm to 4 mm.

[0017] In some embodiments, the first interval is H1, the second interval is H2, and H1 ≥ H2.

[0018] In some embodiments, the optical film includes a second diffuser plate, or the optical film includes a second diffuser plate and an optical brightness enhancement film stacked together, wherein the second diffuser plate is closer to the bottom plate than the optical brightness enhancement film.

[0019] In some embodiments, the second diffusion plate includes a glass substrate and a diffusion ink layer coated on a surface of the glass substrate away from the bottom plate. The optical brightness enhancement film includes a prism film and / or a reflective brightness enhancement film.

[0020] In some embodiments, at least one of the plurality of side panels is a first side panel. The backlight module further includes a frame. The frame is disposed on a side of the first side panel away from the mounting cavity and includes a first sub-segment, a second sub-segment, and a third sub-segment connected in sequence. The first sub-segment is fixedly connected to the side panel. A third gap is defined between the second sub-segment and the side panel. The third sub-segment extends perpendicularly to the second sub-segment and toward the side panel. A receiving cavity is defined between the frame and the first side panel.

[0021] In the display module provided by the embodiments of the present disclosure, a rear housing is used to form a mounting cavity and serve as a carrier for the backlight module, carrying and protecting the other components of the backlight module. A light board is disposed within the mounting cavity and is used to generate light. A quantum dot film is located on one side of the light board and has a first gap between it and the light board. Light emitted by multiple light-emitting devices can be mixed in the first gap, improving the uniformity of the emitted light. The quantum dot film can color-convert at least a portion of the light emitted by the light board so that the light passing through the quantum dot film can include red, green, and blue light. The red, green, and blue light are mixed on the side of the quantum dot film away from the light board to appear white light, allowing the backlight module to emit white light. However, the edges of the quantum dot film are prone to failure, resulting in colored light emitted from the edges of the quantum dot film. The light-blocking portion of the light-shielding member can block the circumferential edge of the quantum dot film, preventing light from being emitted from the edge region of the quantum dot film. This reduces the problem of colored light after passing through the quantum dot film, allowing the backlight module to provide stable white light and improving the stability of the backlight module. A second gap exists between the optical film and the quantum dot film. Light emitted from the quantum dot film is further mixed and evenly distributed within this second gap before being directed toward the optical film, improving light uniformity and allowing light to be emitted even from the side of the light-blocking portion away from the baseplate. Furthermore, the optical film can further process the light, such as by performing light averaging and brightness enhancement, further improving the backlight unit's light uniformity. This prevents dark areas with lower brightness (compared to the center of the light-emitting surface) from appearing at the edges of the backlight unit's light-emitting surface, thereby improving light uniformity.

[0022] In another aspect, a display module is provided. The display module comprises the backlight module described in any one of the above embodiments and a display panel. The display panel is disposed on a side of the optical film of the backlight module away from the base plate.

[0023] In some embodiments, the backlight module includes a receiving cavity. The display module further includes a circuit board and a flexible circuit board. The circuit board is disposed in the receiving cavity. The flexible circuit board is configured to electrically connect the circuit board and the display panel.

[0024] In another aspect, a display device is provided, comprising at least two display modules according to any one of the above embodiments, wherein the at least two display modules are spliced ​​together.

[0025] It is understandable that the beneficial effects that can be achieved by the display module and display device provided by the embodiments of the present disclosure can refer to the beneficial effects that can be achieved by the backlight module mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and are not intended to limit the actual dimensions of the products, actual processes of the methods, actual timing of signals, and the like involved in the embodiments of the present disclosure.

[0027] Figure 1 is a structural diagram of a display device according to some embodiments of the present disclosure;

[0028] Figure 2A For the Figure 1 A sectional view with the center section line AA;

[0029] Figure 2B For the Figure 1 Another sectional view of the middle section line AA;

[0030] Figure 3 This is a structural diagram of a quantum dot film according to some embodiments of the present disclosure;

[0031] Figure 4 is a structural diagram of an optical film according to some embodiments of the present disclosure;

[0032] Figure 5 For the Figure 1 A sectional view with the center section line BB;

[0033] Figure 6 For the Figure 1 A partial enlarged view of center C. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0035] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0036] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0037] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0038] As used herein, the term "if" is optionally interpreted to mean "when" or "upon," depending on the context.

[0039] The use of "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0040] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0041] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0042] As used herein, "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within an acceptable deviation range, wherein the acceptable deviation range is as determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, that the difference between the two equals is less than or equal to 5% of either one.

[0043] Exemplary embodiments are described herein with reference to cross-sectional and / or plan views that are idealized exemplary drawings. In the drawings, the thicknesses of layers and regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include deviations in shape due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0044] Some embodiments of the present disclosure provide a display device 1000, which can be any product or component with a display function, such as a television, a laptop computer, a tablet computer, a mobile phone, a personal digital assistant (PDA), a navigator, a wearable device, an augmented reality (AR) device, a virtual reality (VR) device, etc.

[0045] In some embodiments, see Figure 1 The display device 1000 may be a spliced ​​display device, i.e., the display device 1000 includes at least two display modules 100 spliced ​​together to meet user needs for large-scale display devices; for example, a large-scale spliced ​​display device used in environments such as squares, stations, and conference rooms. The multiple display modules 100 included in the display device 1000 can be displayed individually (only one display module 100 displays), displayed separately, displayed in any combination, or displayed in full-screen combination.

[0046] For example, see Figure 1 , the display device 1000 may include four display modules 100. When the display device 1000 is in operation, any one or more of the display modules 100 may be enabled to display. It should be understood that the number of display modules 100 included in the display device 1000 may also be two, six, eight, etc., which are not listed here one by one.

[0047] Some embodiments of the present disclosure further provide a display module 100, which may be a liquid crystal display module (LCD). Figure 2A The LCD includes a backlight module 110 and a display panel 120 that are stacked.

[0048] In some embodiments, see Figure 2A , Figure 2A It is a cross-sectional view of one side of the display module 110 ; the backlight module 110 includes a rear shell 10 , a light board 20 , a quantum dot film 30 , a light shielding member 40 and an optical film 50 .

[0049] The rear housing 10 includes a bottom plate 11 and a plurality of side plates 12 ( Figure 2A (Only one side panel 12 is shown in the figure) and multiple side panels 12 are connected to the edges of the bottom panel 11. The bottom panel 11 and multiple side panels 12 form a mounting cavity 101 with an opening. The mounting cavity 101 is used to install and protect other components of the backlight module 110 (such as the light panel 20, the quantum dot film 30, etc.).

[0050] For example, in some embodiments, the backlight module 110 has a rectangular structure. Thus, the rear housing 10 includes a rectangular bottom plate 11 and four side plates 12 disposed around the bottom plate 11; the four side plates 12 are connected end to end. The opening of the mounting cavity 101 is located at the edge of the side plates 12 away from the bottom plate 11, facilitating the installation of components (such as the light panel 20 and the quantum dot film 30) within the mounting cavity 101.

[0051] In some embodiments, the rear housing 10 can be stamped and formed from a metal material or alloy material, so that the bottom plate 11 and the plurality of side plates 12 form an integral structure. Alternatively, the bottom plate 11 and the plurality of side plates 12 can be manufactured independently of each other and then fixedly connected (e.g., welded) to form a single unit. The embodiments of the present disclosure are not specifically limited to this.

[0052] See Figure 2AThe light board 20 is located in the mounting cavity 101 and is disposed on the bottom plate 11, that is, the light board 20 is disposed on the side of the bottom plate 11 close to the mounting cavity 101. The light board 20 includes a plurality of light-emitting devices 21 arranged in an array. The light board 20 serves as the light source of the backlight module 110. When the light board 20 is in operation, the plurality of light-emitting devices 21 emit light.

[0053] Among the multiple light-emitting devices 21 included in the light board 20, the interval between two adjacent light-emitting devices 21 is D. In some examples, 8mm≤D≤16mm. If the interval D is too small (for example, less than 8mm), it is not conducive to the heat dissipation of the light board 20. If the interval D is too large (for example, greater than 16mm), it is not conducive to the backlight module 110 forming a uniform surface light source. For the above reasons, 8mm≤D≤16mm. Exemplarily, the interval D between two adjacent light-emitting devices 21 can be 8mm, 12mm, 14mm or 16mm, which are not listed here one by one.

[0054] The light-emitting device 21 can be a micro-LED, such as a mini-LED or micro-LED. Multiple light-emitting devices 21 can be identical to simplify the manufacturing process of the light board 20. In this way, the multiple light-emitting devices 21 included in the light board 20 emit light of the same color when in operation. For example, the light-emitting device 21 can be a mini-LED that emits blue light.

[0055] The quantum dot film 30 is positioned on the side of the light panel 20 away from the base panel 11, supported by multiple side panels 12 to create a first gap between the quantum dot film 30 and the light panel 20. The multiple light-emitting devices 21 included in the light panel 20 represent multiple point light sources. With the light panel 20 positioned within a plane, the light emitted by the light panel 20 exhibits poor uniformity. The light emitted by the light panel 20 is initially mixed within this first gap, providing a uniform light distribution mechanism. This improves the uniformity of light directed at different locations on the quantum dot film 30.

[0056] In some embodiments, the first distance H1 between the quantum dot film 30 and the light board 20 is 6 mm ≤ H1 ≤ 8 mm. For example, the first distance H1 can be 6 mm, 7 mm, 7.5 mm, 8 mm, etc., which are not listed here one by one.

[0057] It should be understood that if the first interval H1 is set too small (for example, less than 6 mm), light shadows may appear on the surface of the quantum dot film 30, and it is not conducive to the uniform mixing of the light emitted by the light board 20 within the first interval H1. If the first interval H1 is set too large, it is not conducive to the lightweight design of the backlight module 110. Therefore, in the embodiment of the present disclosure, 6 mm ≤ H1 ≤ 8 mm.

[0058] In some embodiments, see Figure 2AAt least one side panel 12 among the multiple side panels 12 includes a first extension section 121, a second extension section 122 and a third extension section 123 arranged in sequence along a direction away from the bottom panel 11, and the first extension section 121, the second extension section 122 and the third extension section 123 are connected in sequence. The first extension section 121 is connected to the edge of the bottom panel 11. The second extension section 122 forms a step structure with the first extension section 121 to support the quantum dot film 30. The third extension section 123 extends in a direction perpendicular to the bottom panel 11 and away from the bottom panel 11. The step structure formed on the side panel 12 is conducive to the installation and fixation of the quantum dot film 30. For example, at least two opposite side panels 12 form a step structure. In this way, the quantum dot film 30 can be directly overlapped on the step structure (second extension section 122) of the two side panels 12 and fixed to the step structure through a fixing structure (such as glue or pressing sheet).

[0059] Illustratively, each of the multiple side panels 12 includes a first extension section 121, a second extension section 122, and a third extension section 123. The first extension section 121 can extend in a direction perpendicular to and away from the bottom panel 11. The second extension section 122 can extend in a direction parallel to and away from the bottom panel 11. The third extension section 123 can also extend in a direction perpendicular to and away from the bottom panel 11. In other words, a stepped structure is formed on each side panel 12, which can better support the quantum dot film 30 and help improve the stability of the quantum dot film 30.

[0060] In some embodiments, the quantum dot film 30 may include two stacked water and oxygen barrier layers, and a quantum dot material layer disposed between the two water and oxygen barrier layers. The quantum dot film 30 is configured to color-convert at least a portion of the light emitted by the light panel 20. The water and oxygen barrier layers may be made of polyethylene terephthalate (PET).

[0061] Quantum dots, as a light-emitting semiconductor crystal material, have a narrow and adjustable photoluminescence spectrum, which can effectively convert blue light into highly saturated blue light, green light and red light. Their application in the LCD field can enable LCD to achieve high color gamut display.

[0062] Exemplarily, when the multiple light-emitting devices 21 included in the lamp panel 20 all emit blue light, the quantum dot material layer included in the quantum dot film 30 may include red quantum dot material, green quantum dot material and transparent material. When the blue light emitted by the light-emitting device 21 passes through the red quantum dot material, it is converted into red light. When the blue light emitted by the light-emitting device 21 passes through the green quantum dot material, it is converted into green light. When the blue light emitted by the light-emitting device 21 passes through the transparent material, no color conversion occurs. In this way, after color conversion by the quantum dot film 30, the emitted light includes blue light, red light and green light. The blue light, red light and green light are superimposed in a certain proportion to present white light. That is, the quantum dot film 30 is used to convert the monochromatic light emitted by the lamp panel 20 into three-color light for emission, and to make the emitted three-color light appear white after superposition (mixing), thereby providing a light source of white light for the display panel 120.

[0063] In the reliability industry standard (reliability industry standard 60℃ / 90%RH, 1000h, blue light intensity 20mW / cm 2 ), the failure edge width of the conventional quantum dot film 30 is about 1 mm. That is, under water and oxygen corrosion, the quantum dot film 30 may produce a failure area 31 with a width of about 1 mm.

[0064] See Figure 3 The edge of the quantum dot film 30 produces a failure zone 31 with a width of about 1 mm. The quantum dot material in the failure zone 31 cannot perform color conversion on the light, so the light passing through the failure zone 31 still retains its original color.

[0065] For example, when the multiple light-emitting devices 21 included in the light board 20 all emit blue light, the light passing through the inoperative area 31 remains blue and appears blue on the side of the quantum dot film 30 away from the light board 20. Some of the light passing through other areas of the quantum dot film 30 (excluding the inoperative area 31) is converted into red and green light, while some of the light that is not converted remains blue and appears white on the side of the quantum dot film 30 away from the light board 20. This causes the light passing through the quantum dot film 30 to appear colored (blue) at the edge of the quantum dot film 30, which is not conducive to the display panel 120 displaying the preset color image.

[0066] To solve the above problems, see Figure 2A The backlight module 110 provided in the embodiment of the present disclosure includes a light shielding member 40. The light shielding member 40 includes a fixing portion 41 and a light blocking portion 42. The fixing portion 41 is connected to the plurality of side panels 12 to fix the light shielding member 40 on the side panels 12 of the rear housing 10.

[0067] The light blocking portion 42 and the quantum dot film 30 are away from the side of the bottom plate 11 ( Figure 2AThe light blocking portion 42 abuts against the upper surface of the quantum dot film 30, and along the circumference of the quantum dot film 30, the light blocking portion 42 covers the edge of the quantum dot film 30. That is, the light blocking portion 42 extends along the circumference of the quantum dot film 30 to completely cover the circumferential edge of the quantum dot film 30. The light blocking portion 42 can block the circumferential edge of the quantum dot film 30 to prevent light from being emitted from the edge area of ​​the quantum dot film 30. In this way, even if a failure area 31 appears at the edge of the quantum dot film 30, the light emitted by the light board 20 will not pass through the quantum dot film 30 from the failure area 31. In this way, the risk of light appearing in color after passing through the quantum dot film 30 can be reduced, so that the backlight module 110 can provide stable white light to the display panel 120, thereby improving the stability of the backlight module 110.

[0068] In some embodiments, light shielding member 10 is made of a light-opaque material (e.g., with a light transmittance of less than 99%), such as aluminum or steel; or it is made of a light-transmissive material with a light-absorbing material (e.g., black dye) coated on at least the surface of light-blocking portion 42 of the light-transmissive material, such as a PET sheet coated with black dye. These materials for light shielding member 40 can help reduce the light transmittance of light-blocking portion 42 and enhance the light-blocking effect of light-blocking portion 42.

[0069] In some embodiments, the edge width of the light-blocking portion 42 covering the quantum dot film 30 is 1 mm to 4 mm. This ensures that the edge width of the light-blocking portion 42 covering the quantum dot film 30 is greater than or equal to the failure edge width of a conventional quantum dot film 30, thereby completely shielding any failure area 31 that may occur in the quantum dot film 30. For example, the edge width of the light-blocking portion 42 covering the quantum dot film 30 can be 1 mm, 2 mm, 2.5 mm, or 4 mm, etc., which are not listed here.

[0070] It should be understood that if the edge width of the light-blocking portion 42 covering the quantum dot film 30 is too large (for example, greater than 4 mm), the light-emitting area of ​​the quantum dot film 30 will be reduced, which may result in the backlight module 110 having a wider dark edge, which is not conducive to reducing the width of the side dark area (also known as the non-display area or border area) of the display module 100. Therefore, in the embodiment of the present disclosure, the edge width of the light-blocking portion 42 covering the quantum dot film 30 is 1 mm to 4 mm. In this way, the light-blocking portion 42 can effectively block the possible failure area 31 of the quantum dot film 30 without reducing the light-emitting area of ​​the display module 110.

[0071] The optical film 50 is disposed on the side of the light shielding member 40 away from the bottom plate 11, and has a second gap between it and the quantum dot film 30. Light emitted from the quantum dot film 30 can be further mixed and evenly distributed within the second gap before being emitted toward the optical film 50. This improves the uniformity of the light emitted toward the optical film 50 and allows light to enter the area of ​​the light shielding portion 42 away from the light board 20. This allows light to also be emitted from the side of the light shielding portion 42 away from the bottom plate 11, thereby increasing the light output area of ​​the backlight module 110 and reducing the width of the dark edge (the area where no light is emitted) of the backlight module 110.

[0072] In some embodiments, the second distance between the optical film 50 and the quantum dot film 30 is H2, where H2 is ≥ 4 mm. For example, H2 is 4 mm, 5 mm, or 5.5 mm.

[0073] It should be understood that if the second interval H2 is too small (e.g., less than 4 mm), it is not conducive to uniform mixing of light within the second interval H2; therefore, H2 ≥ 4 mm. As H2 gradually increases (e.g., after it exceeds 8 mm), the light mixing within the second interval H2 reaches a higher level. Further increasing the second interval H2 will not significantly increase the light mixing level, but it will affect the thickness of the backlight module 110, which is not conducive to achieving a thinner and lighter display module 100. Therefore, H2 should not be set too large. For example, 4 mm ≤ H2 ≤ 8 mm.

[0074] In some embodiments, H1+H2>0.8D, that is, the sum of the first interval H1 and the second interval H2 is greater than 0.8 times the interval D between two adjacent light-emitting devices 21. In this way, the light emitted by the light board 20 can be fully mixed and then emitted from the side of the optical film 50 away from the light board 20.

[0075] For example, the interval H1 between the quantum dot film 30 and the light board 20 is 8 mm; the second interval H2 between the optical film 50 and the quantum dot film 30 is 4 mm; and the interval D between two adjacent light emitting devices 21 is 14 mm.

[0076] In some embodiments, the first interval H1 is greater than or equal to the second interval H2, so that the light emitted by the light board 20 can be mixed more fully within the first interval H1, thereby improving the uniformity of the light incident on the quantum dot film 30, and thus making the light passing through the quantum dot film 30 appear as white light.

[0077] The optical film 50 can further process the light, such as light equalization and brightening, to further improve the light uniformity of the backlight module 110, reduce the risk of lower brightness at the edge of the light-emitting surface of the backlight module 110 (compared to the central area of ​​the light-emitting surface), and improve the light uniformity of the backlight module 110.

[0078] In some embodiments, the optical film 50 may include a second diffuser 51. Alternatively, the optical film 50 includes a second diffuser 51 and an optical brightness enhancement film 52 stacked together, wherein the second diffuser 51 is closer to the quantum dot film 30 (e.g., Figure 4 shown).

[0079] See Figure 4 , Figure 4 The optical film 50 shown includes a second diffuser 51 and an optical brightness enhancement film 52; the second diffuser 51 may include a glass substrate 511, and a coating on the side of the glass substrate 511 away from the quantum dot film 30 (bottom plate 11) ( Figure 4 The diffusion ink layer 512 can be formed by the diffusion and scattering effect of the second diffusion plate 51 to further uniformize the light emitted to the second diffusion plate 51, thereby improving the light uniformity of the light emitting surface of the backlight module 110.

[0080] The second diffuser 51 is made of a glass substrate 511 with high structural strength, which helps the second diffuser 51 support the optical brightness enhancement film 52 and the display panel 120 disposed on the side of the optical brightness enhancement film 52 away from the rear housing 10, thereby improving the structural stability of the display module 100.

[0081] See Figure 4 The optical brightness enhancement film 52 includes a prism sheet (Normal Prism Sheet) 521 and / or a reflective brightness enhancement film (Dual Brightness Enhancement Film; DBEF) 522. The optical brightness enhancement film 52 can improve the light extraction efficiency of the backlight module 110 and reduce the energy consumption of the backlight module 110.

[0082] For example, the optical brightness enhancement film 52 may include only the prism sheet 521; or only the reflective brightness enhancement film 522; or include a stacked prism sheet 521 and a reflective brightness enhancement film 522 (eg, Figure 4 shown).

[0083] Refer to Table 1 below, which shows a comparison of light output gains of the backlight module 110 when different optical films 50 are disposed at different positions.

[0084] Table 1:

[0085]

[0086] It should be understood that in Table 1, QD refers to: Quantum Dot film (QD for short) 30; (P0°+P90°) refers to: Prism film 521; DBEF refers to: Reflective Brightness Enhancement Film. The first position refers to: Figure 2AThe position of the quantum dot film 30 shown in FIG (the position of the second extension section 121 of the side plate 12); the second position refers to: Figure 2A The position where the optical film 50 is located (close to the display panel 110 ).

[0087] As can be seen from Table 1 above, when the quantum dot film 30 is set only at the first position, the light output brightness gain coefficient of the backlight module 110 is approximately 0.42, and its light output efficiency is low. Placing the optical film 50 close to the quantum dot film 30 will not only not increase the light output efficiency of the backlight module 110, but will also reduce the light output efficiency of the backlight module 110. When the quantum dot film 30 is set at the first position and only the reflective brightness enhancement film 522 is set at the second position, the light output brightness gain coefficient of the backlight module 110 is 0.73. When the quantum dot film 30 is set at the first position and the prism sheet 521 and the reflective brightness enhancement film 522 are set at the second position, the light output brightness gain coefficient of the backlight module 110 is the largest (approximately 1).

[0088] In summary, it can be seen that when the optical film 50 composed of the prism sheet 521 and the reflective brightness enhancement film 522 is arranged at the second position, that is, when there is a second interval between the optical film 50 and the quantum dot film 30, the light extraction efficiency of the backlight module 110 can be maximized.

[0089] The reflective brightness enhancement film 522 reflects part of the light back into the second space, and the light passes through the quantum dot film 30 from the second space to the side of the light board 20. In order to reduce the light loss and improve the light extraction efficiency of the backlight module 110. In some embodiments, refer to Figure 2A , the backlight module 110 also includes a reflective layer 60. The reflective layer 60 is arranged on the surface of the lamp board 20 close to the installation cavity 101, and is arranged to avoid the light-emitting device 21, that is, the reflective layer 60 is arranged in the gap between the multiple light-emitting devices 21 of the lamp board 20. Based on this, after being reflected by the reflective brightness enhancement film 522, the light emitted in the direction of the base plate 11 is reflected by the reflective layer 60 and then propagates toward the direction of the optical film 50 again, and finally passes through the optical film 50 and is emitted from the side of the optical film 50 away from the base plate 11. The luminous efficiency of the backlight module 110 is improved. Moreover, the light reflected back into the installation cavity 101 by the reflective brightness enhancement film 522 can be uniformly treated again in the first interval and the second interval, thereby further improving the light uniformity of the backlight module 110.

[0090] The backlight module 110 provided in the embodiment of the present disclosure is Figure 2AThe rear shell 10 is used to form the installation cavity 101 and serve as a carrier of the backlight module 101, carrying and protecting other components of the backlight module 110. The light board 20 is arranged in the installation cavity 101 for emitting light. The quantum dot film 30 is located on one side of the light board 20 and has a first interval between the light board 20. The first interval and the quantum dot film 30 together form a first light mixing structure. The light emitted by the multiple light-emitting devices 20 is mixed by the first light mixing structure to improve the uniformity of the emitted light. In addition, the quantum dot film 30 can perform color conversion on at least part of the light emitted by the light board 20, so that the light after passing through the quantum dot film 30 can include red light, green light and blue light. The red light, green light and blue light appear as white light on the side of the quantum dot film 30 away from the light board 20, so that the backlight module 110 can emit white light outward. The light-blocking portion 42 of the light-shielding member 40 can block the circumferential edge of the quantum dot film 30, preventing light from being emitted from the edge area of ​​the quantum dot film 30, thereby reducing the problem of light appearing colored after passing through the quantum dot film 30, allowing the backlight module 110 to provide stable white light and improving the stability of the backlight module 110. A second gap is provided between the optical film 50 and the quantum dot film 40, and the second gap and the optical film 50 together form a second light-mixing structure. The light emitted from the quantum dot film 30 can be further mixed evenly within the second gap and then emitted toward the optical film 50, thereby improving the uniformity of the light and allowing light to be emitted from the side of the light-blocking portion 42 away from the bottom plate 11. At the same time, the optical film 50 can further process the light, such as light equalization and brightening, to further improve the light uniformity of the backlight module 110, avoid the appearance of dark areas with lower brightness (compared to the central area of ​​the light emitting surface of the backlight module 110) at the edge of the light emitting surface of the backlight module 110, and improve the light uniformity of the backlight module 110.

[0091] In some embodiments, the light shielding member 40 can be formed by utilizing the existing structure of the backlight module 110 (eg Figure 2A As shown), or it can be made as a separate component (as Figure 2B shown).

[0092] When the light shielding member 40 is formed by utilizing the existing structure of the backlight module 110, refer to Figure 2A The fixing portion 41 of the light shielding member 40 is located on the side of the plurality of side panels 12 away from the mounting cavity. The fixing portion 41 is fixedly connected to the third extension section 123 of the side panel 12. Figure 2AThe fixing portion 41 and the third extension section 123 can be connected and fixed by screws 102. Thus, threaded holes can be provided at corresponding positions on the fixing portion 41 and the third extension section 123 to facilitate the screws 102 to securely connect the two. Multiple screws 102 can be provided along the circumference of the fixing portion and the side panel 12. The number of screws 102 and the spacing between adjacent screws 102 can be designed based on actual needs. It should be understood that the fixing portion 41 and the third extension section 123 can also be secured by other connecting structures, such as a snap-fit ​​structure.

[0093] The light shielding member 40 further includes a supporting portion 43 and a connecting portion 44. Figure 2A The support portion 43 is connected to the fixing portion 41 and extends away from the base plate 11. It is configured to support the optical film 50 and the display panel 120; that is, the light shielding member 40 supports the optical film 50 and the display panel 120. One end of the connecting portion 44 is connected to the support portion 43, and the other end is connected to the light blocking portion 42, thereby connecting the light blocking portion 42, the fixing portion 41, and the support portion 43 into a single structure. In some examples, the display panel 120 is fixedly connected to the optical film 50 using adhesive.

[0094] The light shielding member 40 can not only shield the circumferential edge of the quantum dot film 30 , but also support the optical film 50 and the display panel 120 , thereby reducing the number of components of the backlight module 110 and lowering the difficulty of assembling the backlight module 110 .

[0095] In some embodiments, see Figure 2A , along the direction parallel to the quantum dot film 30 ( Figure 2A In the horizontal direction (in the horizontal direction in FIG), a portion of the light-blocking portion 42 extends outward from the edge of the quantum dot film 30. The connecting portion 44 is connected to the portion of the light-blocking portion 42 that extends outward from the edge of the quantum dot film 30. Exemplarily, the connecting portion 44 is connected to the edge of the light-blocking portion 42 away from the quantum dot film 30. In this way, the risk of the connecting portion 44 blocking the quantum dot film 30 can be reduced.

[0096] In some embodiments, along the direction perpendicular to the quantum dot film 30 ( Figure 2A In the vertical direction of the image, the size of the portion of the light-blocking portion 42 covering the quantum dot film 30 is larger than the size of the portion of the light-blocking portion 42 extending outward from the edge of the quantum dot film 30. In this way, the light-shielding effect of the portion of the light-blocking portion 42 covering the quantum dot film 30 is increased, thereby reducing the possibility of light passing through the light-blocking portion 42. At the same time, the structural strength of the light-blocking portion 42 can be increased, reducing the possibility of deformation of the light-blocking portion 42.

[0097] In some embodiments, the surface of the light blocking portion 42 away from the quantum dot film 30 is substantially parallel to the plane where the quantum dot film 30 is located.

[0098] In some embodiments, see Figure 2A The surface of the support portion 43 near the mounting cavity 101 and the surface of the connecting portion 44 near the mounting cavity 101 are connected, forming a curved surface that bulges toward the side near the mounting cavity 101. That is, the surfaces of the support portion 43 and the connecting portion 44 of the light shielding member 40 near the mounting cavity 101 are convex curved surfaces. These curved surfaces can better reflect light to various areas, thereby improving the uniformity of light on the side of the light shielding member 40 away from the light board 20 and improving the uniformity of light on the side of the light shielding member 40 near the mounting cavity 101.

[0099] In some embodiments, see Figure 2A The backlight module 110 further includes a diffuse reflection layer 70. The diffuse reflection layer 70 covers at least a portion of the surface of the connecting portion 44 and the supporting portion 43 near the mounting cavity 101. A portion of the light reflected back into the second compartment by the optical film 50 will be directed toward the surfaces of the connecting portion 44 and the supporting portion 43 near the mounting cavity 101. Providing the diffuse reflection layer 70 on these surfaces prevents this portion of light from being specularly reflected on the surfaces of the connecting portion 44 and the supporting portion 43, and instead causes this portion of light to be diffusely reflected on the surface of the diffuse reflection layer 70, thereby improving the uniform light effect within the second compartment.

[0100] In some other embodiments, the roughness of the surface of the connecting portion 44 and the supporting portion 43 close to the mounting cavity 101 may be increased by surface treatment technology (such as shot peening), thereby causing light to be diffusely reflected on the surface of the connecting portion 44 and the supporting portion 43 close to the mounting cavity 101.

[0101] In some embodiments, the light shielding member 40 is formed of an aluminum extrusion. This extrusion improves the dimensional accuracy and straightness of the light shielding member 40, improves the positioning accuracy of the rear housing 10 and the light shielding member 40, and improves the installation accuracy of the backlight module 110. Furthermore, the aluminum extrusion has a high structural strength and is not easily deformed, effectively supporting the optical film 50 and the display panel 120, thereby improving the structural stability of the display module 100.

[0102] In the case where the light shielding member 40 is manufactured as a separate component, see Figure 2B , the fixing portion 41 is located on the side of the side plate 12 close to the installation cavity 101. For example, Figure 2B As shown, the fixing portion 41 is fixedly connected to the second extension section 122 of the side panel 12. For example, the fixing portion 41 and the side panel 12 can be fixedly connected by screws (not shown in the figure). It should be understood that the fixing portion 41 can also be fixedly connected to the third extension section 123 of the side panel 12. In the case where the shading member 40 is made as an independent component, refer to Figure 2BThe backlight module 110 further includes a support frame 80 for supporting the optical film 50 and the display panel 120 . The support frame 80 surrounds the side panels 12 and includes a mounting portion 81 , a bearing portion 82 and an extension portion 83 .

[0103] The mounting portion 81 is located on a side of the side panels 12 away from the mounting cavity 101 and is fixedly connected to the side panels 12. The supporting portion 82 is connected to the mounting portion 81 and extends away from the bottom panel 11, and is configured to support the optical film 50. One end of the extending portion 83 is connected to the supporting portion 82, and the other end abuts against the fixing portion 41 of the light shielding member 40.

[0104] It is important to understand that, see Figure 2B There is an installation gap between the edge of the quantum dot film 30 and the third side panel 123 , and the fixing portion 41 of the shading member 40 can be disposed in the installation gap and attached to and fixedly connected to the second extension section 122 of the side panel 12 .

[0105] The light shielding member 40 is an independent structural member, which is only used to cover the edge of the quantum dot film 30. The optical film 50 and the display panel 120 are supported by a support frame 80. The light shielding member 40 and the support frame 80 have simple structures and are easy to manufacture.

[0106] In some embodiments, see Figure 2A To improve the uniformity of light emitted from the light board 20 to the quantum dot film 30, the backlight module 110 further includes a first diffuser 90. The first diffuser 90 is disposed on the side of the quantum dot film 30 near the light board 20 and is supported by a plurality of side panels 12. The first diffuser 90 is used to even out the light, thereby improving the uniformity of light emitted to the quantum dot film 30.

[0107] In some embodiments, the first diffuser 90 is disposed on the step structure (the second extension section 122 of the side plate 12) and is in contact with the surface of the quantum dot film 30 close to the bottom plate 11. The first diffuser 90 can also be used to support the quantum dot film 30.

[0108] In some embodiments, the first diffuser plate 90 is fixedly connected to the second extension section 122 via adhesive. The light shielding portion 42 of the light shielding member 40 presses the edge of the quantum dot film 30 against the first diffuser plate 90, while also pressing the first diffuser plate 90 against the second extension section 122 of the side panel 12. This simplifies the connection structure between the quantum dot film 30 and the first diffuser plate 90, simplifies the installation process of the backlight module 110, and improves the assembly efficiency of the backlight module 110.

[0109] The first diffuser 90 may be a polystyrene (PS) diffuser. Compared to the first diffuser 51 (including the glass substrate 511 and the ink layer 512 ), the PS diffuser is cheaper, which helps reduce the manufacturing cost of the backlight module 110 .

[0110] In some embodiments, the backlight module 110 further includes a plurality of support columns 111. Figure 2A The support column 111 is disposed between the light board 20 and the first diffuser 90. One end of the support column 111 is connected to the light board 20, and the other end contacts the surface of the first diffuser 90 closest to the light board 20. The support column 111 is used to support the first diffuser 90 and reduce the risk of deformation of the first diffuser 90. The end of the support column 111 connected to the light board 20 is disposed within the gaps between the plurality of light-emitting devices 20.

[0111] For example, along a direction perpendicular to the light board 20 and away from the light board 20 , the cross-sectional dimensions of the support column 111 may gradually decrease, so as to reduce the shielding area of ​​the support column 90 on the light emitted to the first diffuser plate 90 .

[0112] It should be understood that the end of the support column 111 in contact with the first diffuser 90 is in surface contact, not point contact. Exemplarily, the support column 11 is a frustum or prism structure to reduce the pressure between the support column 111 and the first diffuser 90 .

[0113] The number and density of support columns 111 can be adjusted based on actual needs. For example, if the first diffuser plate 90 is a PS diffuser, which has poor rigidity and is prone to bending and deformation, the density of support columns 90 can be appropriately increased. For example, if the display module 100 is 55 inches in size, the number of support columns 111 can be 12.

[0114] In some other embodiments, the backlight module 110 may further include a second support column, which is arranged between the quantum dot film 30 and the optical film 50 to support the optical film 50 and the display panel 120, thereby reducing the risk of bending and deformation of the optical film 50 and the display panel 120.

[0115] For example, a second support column can be set at the position where the support column 111 is set, that is, the vertical projection of the second support column on the base plate 11 at least partially overlaps with the vertical projection of the support column 111 on the base plate 11, so that the compressive stress on the optical film 50 can be transferred to the base plate 11 through the support column 111, thereby improving the structural stability of the backlight module 110.

[0116] In some embodiments, see Figure 5 At least one of the plurality of side panels 12 is a first side panel 12A, and the remaining side panels are second side panels 12B. Figure 2A , the backlight module 110 also includes a frame 13. The frame 13 is arranged on the side of the first side panel 12A away from the installation cavity 101, and includes a first sub-segment 131, a second sub-segment 132 and a third sub-segment 133 connected in sequence. The first sub-segment 131 is fixedly connected to the side panel 12, and there is a third interval between the second sub-segment 132 and the first side panel 12A, and the third interval is H3. The third sub-segment 133 extends in a direction perpendicular to the second sub-segment 132 and toward the first side panel 12A (horizontally from right to left in Figure 2); the accommodating cavity 104 is enclosed between the frame 13 and the first side panel 12A. The frame 13 is used to form the accommodating cavity 104 and protect the structural components in the accommodating cavity 104. Exemplarily, the accommodating cavity 104 is configured to install the circuit board 130 of the display module 100.

[0117] For example, referring to FIG2A , the fixing portion 41 of the light shielding member 40 is located on a side of the third extension section 123 of the side panel 12 that is away from the mounting cavity 101, and the fixing portion 41 is fixedly connected to the third extension section 123. The first sub-section 131 can be disposed on a side of the fixing portion 41 that is away from the third extension section 123 and fixedly connected to the fixing portion 41. For example, threaded holes that communicate with each other are provided at corresponding positions of the first sub-section 131, the fixing portion 41, and the third extension section 123, and screws are used to securely connect the first sub-section 131, the fixing portion 41, and the third extension section 123.

[0118] In some embodiments, the backlight module 110 includes four side panels 12 arranged in a rectangular shape, two adjacent side panels are first side panels 12A, and the other two side panels are second side panels 12B. That is, a receiving cavity 104 is provided on each of two adjacent sides of the backlight module 110 .

[0119] In some embodiments, see Figure 5 The display module 100 further includes a circuit board 130 and a flexible circuit board 140 . The circuit board 130 is disposed in the accommodating cavity 104 , and the flexible circuit board 140 is configured to electrically connect the circuit board 130 to the display panel 120 .

[0120] Exemplarily, the display module includes two sets of circuit boards 130, which are respectively disposed in two accommodating cavities 104. The flexible circuit board can be a chip-on-film (COF), which is flexible and very thin (taking COF as an example, the thickness is less than 0.2 mm). The flexible circuit board 140 can pass between the first sub-segment 131 and the fixing portion 41, so that one end of the flexible circuit board 140 can be electrically connected to the circuit board 130 located inside the accommodating cavity 104 and the other end can be electrically connected to the display panel 120 located outside the accommodating cavity 104. It should be understood that along the extension direction of the first side panel 12A, the flexible circuit board 140 can be disposed between two adjacent screws 102 to prevent interference between the flexible circuit board 140 and the screws 102.

[0121] In some embodiments, see Figure 5 A fourth gap 105 is defined between the circuit board 130 and the third extension section 123 of the side panel 12 to reduce collisions between the circuit board 130 and the surface of the third extension section 123 near the accommodating cavity 104. The display module 100 further includes a buffer block 150. The buffer block 150 is positioned within the fourth gap 105 between the circuit board 130 and the third extension section 123 to limit shaking of the circuit board 130 and reduce the risk of damage to the circuit board 130.

[0122] In some embodiments, see Figure 5 The display module 110 further includes a protective film 160 disposed around the backlight module 110 and the display panel 120. The protective film 160 includes a portion extending perpendicularly to the display panel 120 and the bottom plate 11 of the rear housing 10 to provide a flat side for the display module 110.

[0123] On the side close to the first side panel 12A, the second sub-segment 132 of the frame 13 is roughly flush with the edge of the display panel 110 on the side away from the first side panel 12A, one end of the protective film 160 is connected to the edge of the display panel 120 (for example, bonded), and the other end is connected to the surface of the third sub-segment 133 away from the display panel 120 (for example, bonded).

[0124] On the side close to the second side plate 12B, the display module 110 further includes a pad 170. The pad 170 is disposed on the side of the first extension section 121 of the second side plate 12B away from the mounting cavity 101. One side of the pad 170 is fixedly connected to the first extension section 121 in a direction perpendicular to the first extension section 121, and the other side is substantially flush with the edge of the display panel 110. Figure 5The spacer 170 is located away from the display panel 110 and is substantially flush with at least a portion of the bottom plate 11 of the rear case 10. One end of the protective film 160 is connected to an edge of the display panel 110, and the other end is connected (e.g., bonded) to the surface of the spacer 170 away from the display panel 110.

[0125] For example, the protective film 160 may be an aluminum foil tape.

[0126] In some embodiments, as Figure 2A As shown, due to the light homogenization effect of the second gap H2 and the optical film 50, the light incident from the quantum dot film 30 into the second gap H2 can be evenly distributed between the quantum dot film 30 and the optical film 50. Based on this, along the direction perpendicular to the third extension section 123 of the side panel 12, the size of the support portion 43 of the light shielding member 40 can be gradually thinned away from the bottom plate 11, and the support portion 43 supports the edge position of the optical film 50. In this way, the surface area of ​​the backlight module 110 can be increased, and the width of the dark side of the backlight module 110 can be reduced, which is conducive to achieving a narrow frame for the display module 100.

[0127] For example, see Figure 5 and Figure 6 In the display module 100, the side where the first side panel 12A of the backlight module 110 is located is the first side panel 1001, and the side where the second side panel 12B is located is the second side panel 1002. The width of the non-display area (dark side area) of the first side panel 1001 is smaller than the width of the non-display area of ​​the second side panel 1002.

[0128] In some embodiments, in the display device 1000, refer to Figure 6 Of the two side edges of two adjacent display modules 100 that are close to each other, one is the first side edge 1001 and the other is the second side edge 1002 . This is beneficial for uniforming the width of the splicing seams of multiple display modules 100 .

[0129] For example, when using the backlight module 110 provided by the embodiments of the present disclosure, using existing processing techniques, the width of the non-display area (dark border area) of the first side 1001 can be reduced to approximately 0.6 mm, and the width of the non-display area of ​​the second side 1002 can be reduced to approximately 0.4 mm. This reduces the width of the seam in the display device 1000 to approximately 1 mm, thereby achieving a narrow seam. This improves the user experience.

[0130] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present disclosure should be included within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A backlight module, characterized in that: include: A rear housing comprising a bottom plate and a plurality of side plates arranged around the bottom plate, the plurality of side plates being connected to edges of the bottom plate, the bottom plate and the plurality of side plates forming a mounting cavity having an opening; a light board, located in the mounting cavity and disposed on the bottom plate, comprising a plurality of light-emitting devices arranged in an array; a quantum dot film disposed on a side of the light panel away from the bottom panel; the plurality of side panels supporting the quantum dot film such that a first gap exists between the quantum dot film and the light panel; the quantum dot film being configured to perform color conversion on at least a portion of the light emitted by the light panel; The light shielding member includes a fixing portion, a supporting portion, a connecting portion, and a light-blocking portion; the fixing portion is located on a side of the plurality of side panels away from the mounting cavity and is connected to the plurality of side panels; the supporting portion is connected to the fixing portion and extends in a direction away from the bottom plate; one end of the connecting portion is connected to the supporting portion, and the other end is connected to the light-blocking portion; the light-blocking portion abuts against a side of the quantum dot film away from the bottom plate, and along the circumference of the quantum dot film, the light-blocking portion covers the edge of the quantum dot film; The optical film is arranged on a side of the light-shielding component away from the bottom plate, supported on the supporting portion, and has a second gap between it and the quantum dot film.

2. The backlight module according to claim 1, wherein: Along a direction parallel to the quantum dot film, a portion of the light blocking portion extends out from an edge of the quantum dot film; The connecting portion is connected to a portion of the light blocking portion extending out from an edge of the quantum dot film.

3. The backlight module according to claim 2, wherein: The surface of the supporting portion close to the installation cavity is connected to the surface of the connecting portion close to the installation cavity, forming an arc surface that bulges toward a side close to the installation cavity.

4. The backlight module according to claim 1, wherein: The backlight module further includes: A diffuse reflection layer covers at least a portion of the surface of the connecting portion and the supporting portion close to the installation cavity.

5. The backlight module according to claim 1, wherein: At least one side plate includes a first extension section, a second extension section, and a third extension section sequentially arranged in a direction away from the bottom plate, and the first extension section, the second extension section, and the third extension section are sequentially connected; The first extension section is connected to the edge of the bottom plate; the second extension section and the first extension section form a step structure to support the quantum dot film; The third extension section extends in a direction perpendicular to the bottom plate and away from the bottom plate.

6. The backlight module according to claim 5, wherein: The fixing portion is located on a side of the side plate away from the installation cavity, and the fixing portion is fixedly connected to the third extending section.

7. The backlight module according to claim 1, wherein: The backlight module further includes: The first diffusion plate is arranged on a side of the quantum dot film close to the bottom plate, and the plurality of side plates support the first diffusion plate.

8. The backlight module according to claim 7, wherein: The quantum dot film is in direct contact with the first diffusion plate, and the light shielding portion presses the quantum dot film onto the first diffusion plate.

9. The backlight module according to any one of claims 1 to 8, wherein: The backlight module further includes: A plurality of support columns are arranged between the light board and the first diffusion plate, one end of the support columns is connected to the light board, and the other end of the support columns is in contact with a surface of the first diffusion plate close to the light board.

10. The backlight module according to any one of claims 1 to 8, characterized in that: The edge width of the light-blocking portion covering the quantum dot film is 1 mm to 4 mm.

11. The backlight module according to any one of claims 1 to 8, wherein: The first interval is H1, the second interval is H2, and H1≥H2.

12. The backlight module according to any one of claims 1 to 8, wherein: The optical film includes a second diffusion plate; or, The optical film includes a second diffusion plate and an optical brightness enhancement film which are stacked together. The second diffusion plate is closer to the bottom plate than the optical brightness enhancement film.

13. The backlight module according to claim 12, wherein: The second diffusion plate includes a glass substrate and a diffusion ink layer coated on a surface of the glass substrate away from the bottom plate; The optical brightness enhancement film includes a prism sheet and / or a reflective brightness enhancement film.

14. The backlight module according to claim 1, wherein: At least one side panel among the plurality of side panels is a first side panel; The backlight module further includes: A frame is arranged on the side of the first side panel away from the installation cavity, and includes a first sub-segment, a second sub-segment and a third sub-segment connected in sequence; the first sub-segment is fixedly connected to the first side panel, a third interval is provided between the second sub-segment and the first side panel, and the third sub-segment extends in a direction perpendicular to the second sub-segment and toward the first side panel; a accommodating cavity is enclosed between the frame and the first side panel.

15. A backlight module, characterized in that: include: A rear housing comprising a bottom plate and a plurality of side plates arranged around the bottom plate, the plurality of side plates being connected to edges of the bottom plate, the bottom plate and the plurality of side plates forming a mounting cavity having an opening; a light board, located in the mounting cavity and disposed on the bottom plate, comprising a plurality of light-emitting devices arranged in an array; a quantum dot film disposed on a side of the light panel away from the bottom panel; the plurality of side panels supporting the quantum dot film such that a first gap exists between the quantum dot film and the light panel; the quantum dot film being configured to perform color conversion on at least a portion of the light emitted by the light panel; The light shielding member includes a fixing portion and a light blocking portion; the fixing portion is located on a side of the plurality of side panels close to the mounting cavity and is connected to the plurality of side panels; the light blocking portion abuts against a side of the quantum dot film away from the bottom plate, and along the circumference of the quantum dot film, the light blocking portion covers the edge of the quantum dot film; a support frame, arranged around the plurality of side panels, comprising a mounting portion, a bearing portion, and an extending portion; the mounting portion is located on a side of the plurality of side panels away from the mounting cavity and is fixedly connected to the plurality of side panels; the bearing portion is connected to the mounting portion and extends in a direction away from the bottom plate; one end of the extending portion is connected to the bearing portion, and the other end abuts against the fixing portion of the light shielding member; The optical film is arranged on a side of the light-shielding component away from the bottom plate, supported on the supporting portion, and has a second gap between it and the quantum dot film.

16. A display module, characterized in that: include: The backlight module according to any one of claims 1 to 15; The display panel is arranged on a side of the optical film of the backlight module away from the bottom plate.

17. The display module according to claim 16, wherein: The backlight module includes a receiving cavity; The display module further includes: A circuit board is disposed in the accommodating cavity; The flexible circuit board is configured to electrically connect the circuit board and the display panel.

18. A display device, characterized in that: The display module comprises at least two display modules as claimed in claim 16 or 17, wherein the at least two display modules are spliced ​​together.

Images