WO2023050366A1

WO2023050366A1 - Backlight module, display module and display device

Info

Publication number: WO2023050366A1
Application number: PCT/CN2021/122326
Authority: WO
Inventors: 钟维; 石海军; 付常佳; 万海燕; 孙晓娣
Original assignee: 京东方科技集团股份有限公司; 北京京东方显示技术有限公司
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2023-04-06
Also published as: CN116802554A

Abstract

A backlight module (110), comprising a rear housing (10), a lamp panel (20), a quantum dot film (30), a light shield (40), and an optical film (50). The rear housing (10) comprises a base plate (11) and a plurality of side plates (12) arranged around the base plate (11), wherein the plurality of side plates (12) are each connected to an edge of the base plate (11), and the base plate (11) and the plurality of side plates (12) enclose a mounting cavity (101) having an opening. The lamp panel (20) is located inside the mounting cavity (101) and is arranged on the base plate (11), and the lamp panel (20) comprises a plurality of light-emitting devices (21) arranged in an array. The quantum dot film (30) is arranged on the side of the lamp panel (20) away from the base plate (11), and the quantum dot film (30) is configured for color conversion of at least part of light emitted by the lamp panel (20). The plurality of side plates (12) support the quantum dot film (30), such that a first distance is formed between the quantum dot film (30) and the lamp panel (20). The light shield (40) comprises a fixing portion (41) and a light blocking portion (42), wherein the fixing portion (41) is connected to the plurality of side plates (12); and the light blocking portion (42) abuts against a surface of the quantum dot film (30) away from the base plate (11), and covers an edge of the quantum dot film (30) in a circumferential direction of the quantum dot film (30). The optical film (50) is arranged on the side of the light shield (40) away from the base plate (11), and a second distance is formed between the optical film (50) and the quantum dot film (30).

Description

Backlight module, display module and display device

technical field

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 technique

With the advancement of display technology, display devices are becoming more and more popular. The display device includes a backlight module and a display panel. Among them, more and more backlight modules choose micro light emitting diodes (Light Emitting Diode; LED for short) 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 uniform light, etc.) to provide uniform and stable white light for the display panel. At present, improving the light uniformity and stability of the backlight module is an urgent problem to be solved.

public content

In one aspect, a backlight module is provided. The backlight module includes a rear shell, a lamp panel, a quantum dot film, a shading member and an optical film. Wherein, the rear shell includes a bottom plate and a plurality of side plates arranged around the bottom plate, the multiple side plates are connected with the edge of the bottom plate, and the bottom plate and the multiple side plates enclose an installation cavity with an opening. The lamp board is located in the installation cavity and is arranged on the base plate, and the lamp board includes a plurality of light emitting devices arranged in an array. The quantum dot film is arranged on the side of the lamp board away from the base plate, and the quantum dot film is configured to perform color conversion on at least part of the light emitted by the lamp board. A plurality of side plates support the quantum dot film, so that there is a first interval between the quantum dot film and the light board. The light-shielding member includes a fixed part and a light-shielding part; the fixing part is connected to a plurality of side plates, the light-shielding part abuts against the side of the quantum dot film away from the bottom plate, and along the circumferential direction of the quantum dot film, the light-shielding part covers the quantum dot film edge. The optical film is arranged on the side of the light-shielding member away from the bottom plate, and has a second distance from the quantum dot film.

In some embodiments, the fixing portion is located on a side of the plurality of side plates away from the installation cavity. The shade also includes a supporting part and a connecting part. The supporting part is connected with the fixing part, extends away from the bottom plate, and is configured to support the optical film. One end of the connection part is connected with the supporting part, and the other end is connected with the light blocking part.

In some embodiments, in a direction parallel to the quantum dot film, part of the light blocking portion protrudes from the edge of the quantum dot film. The connection part is connected with the part of the light blocking part protruding from the edge of the quantum dot film.

In some embodiments, the surface of the supporting part close to the installation cavity is connected to the surface of the connection part close to the installation cavity, forming an arc surface protruding toward a side close to the installation cavity.

In some embodiments, the backlight module further includes a diffuse reflection layer. The diffuse reflective layer covers at least part of the surface of the connection part and the support part close to the installation cavity.

In some embodiments, the fixing portion is located on a side of the plurality of side plates close to the installation cavity.

In some embodiments, the backlight module further includes a supporting frame. The support frame is arranged around a plurality of side panels, including a mounting part, a bearing part and an extension part. The mounting part is located on a side of the multiple side plates away from the mounting cavity, and is fixedly connected with the multiple side plates. The carrying part is connected with the mounting part, extends away from the bottom plate, and is configured to support the optical film. One end of the extension part is connected to the carrying part, and the other end is abutted against the fixing part of the shade.

In some embodiments, at least one side panel includes a first extension section, a second extension section and a third extension section arranged in sequence along a direction away from the bottom panel, and the first extension section, the second extension section and the third extension section are sequentially arranged 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 stepped structure to support the quantum dot film. The third extension section extends along a direction perpendicular to the base plate and away from the base plate.

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.

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

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

In some embodiments, the backlight module further includes a plurality of support columns. A plurality of support columns are arranged between the lamp board and the first diffuser board, one end is connected with the lamp board, and the other end is in contact with the surface of the first diffuser board close to the lamp board.

In some embodiments, the edge width of the light blocking portion covering the quantum dot film is 1mm˜4mm.

In some embodiments, the first interval is H1, the second interval is H2, and H1≧H2.

In some embodiments, the optical film includes a second diffuser plate. Alternatively, the optical film includes a second diffusion plate and an optical brightness enhancement film that are laminated, and the second diffusion plate is closer to the bottom plate than the optical brightness enhancement film.

In some embodiments, the second diffusion plate includes a glass substrate, and a diffusion ink layer coated on the surface of the glass substrate away from the bottom plate. Optical brightness enhancement films include prism sheets and/or reflective brightness enhancement films.

In some embodiments, at least one of the plurality of side panels is a first side panel. The backlight module also includes a bezel. The frame is arranged on the side of the first side plate away from the installation cavity, and includes a first subsection, a second subsection and a third subsection connected in sequence. The first subsection is fixedly connected with the side plate. There is a third interval between the second subsection and the side plate. The third subsection extends along a direction perpendicular to the second subsection and close to the side plate. An accommodating cavity is enclosed between the frame and the first side plate.

In the display module provided by the embodiments of the present disclosure, the rear case is used to form an installation cavity, and serves as a carrier of the backlight module to carry and protect other parts of the backlight module. The lamp board is arranged in the installation cavity for generating light. The quantum dot film is located on one side of the lamp panel, and there is a first interval between it and the lamp panel, and the light emitted by multiple light-emitting devices can be mixed in the first interval to improve the uniformity of the emitted light. The quantum dot film can perform color conversion on at least part of the light emitted by the light panel, so that the light passing through the quantum dot film can include red light, green light and blue light. The red light, green light and blue light appear as white light after being mixed on the side of the quantum dot film away from the light board, so that the backlight module can emit white light outward. However, the edge of the quantum dot film is prone to failure, resulting in colored light emitted through the edge of the quantum dot film. The light-shielding part of the shading member can block the circumferential edge of the quantum dot film to prevent light from being emitted from the edge area of the quantum dot film, thereby reducing the problem of the color of the light after passing through the quantum dot film, so that the backlight module can provide stable white light , to improve the stability of the backlight module. There is a second interval between the optical film and the quantum dot film, and the light emitted by the quantum dot film can be further mixed evenly in the second interval, and then directed to the optical film to improve the uniformity of the light and keep the light blocking part away from the bottom plate. There is also light coming out of one side. Moreover, the optical film can further process the light, such as uniform light treatment and brightening treatment, etc., to further improve the uniformity of the light output of the backlight module, and avoid low brightness at the edge of the light output surface of the backlight module (compared with the brightness of the light output surface of the backlight module). The dark area in the central area) improves the light uniformity of the backlight module.

On the other hand, a display module is provided. The display module includes the backlight module and the display panel described in any one of the above embodiments. The display panel is arranged on the side of the optical film of the backlight module away from the bottom plate.

In some embodiments, the backlight module includes an accommodating cavity. The display module also includes a circuit board and a flexible circuit board. The circuit board is arranged in the accommodating chamber. The flexible circuit board is configured to electrically connect the circuit board and the display panel.

In yet another aspect, a display device is provided. The display device includes at least two display modules described in any one of the above embodiments, and at least two display modules are spliced together.

It can be understood that, the beneficial effects that can be achieved by the display module and the display device provided by the embodiments of the present disclosure can refer to the beneficial effects that can be achieved by the backlight module above, and will not be repeated here.

Description of drawings

In order to illustrate the technical solutions in the present disclosure more clearly, the following will briefly introduce the accompanying drawings used in some embodiments of the present disclosure. Apparently, the accompanying drawings in the following description are only appendices to some embodiments of the present disclosure. Figures, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams, and are not limitations on the actual size of the product involved in the embodiments of the present disclosure, the actual process of the method, the actual timing of signals, and the like.

FIG. 1 is a structural diagram of a display device according to some embodiments of the present disclosure;

Fig. 2A is a kind of sectional view along section line A-A in Fig. 1;

Fig. 2B is another kind of sectional view along section line A-A in Fig. 1;

3 is a structural diagram of a quantum dot film of some embodiments of the present disclosure;

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

Fig. 5 is a kind of sectional view along section line B-B in Fig. 1;

Fig. 6 is a partially enlarged view along C in Fig. 1 .

Detailed ways

The technical solutions in some embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present disclosure, not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments provided in the present disclosure belong to the protection scope of the present disclosure.

Throughout the specification and claims, unless the context requires otherwise, the term "comprise" and other forms such as the third person singular "comprises" and the present participle "comprising" are used Interpreted as the meaning of openness and inclusion, 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 ( some examples)", etc. are intended to indicate that a specific feature, structure, material or characteristic related to the embodiment or example is included in at least one embodiment or example of the present disclosure. Schematic representations of the above terms are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be included in any suitable manner in any one or more embodiments or examples.

Hereinafter, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

"A and/or B" includes the following three combinations: A only, B only, and a combination of A and B.

As used herein, the term "if" is optionally interpreted to mean "when" or "at" depending on the context.

The use of "configured to" herein means open and inclusive language that does not exclude devices that are adapted or configured to perform additional tasks or steps.

Additionally, the use of "based on" is meant to be open and inclusive, as a process, step, calculation, or other action that is "based on" one or more stated conditions or values may in practice be based on additional conditions or beyond stated values.

As used herein, "about", "approximately" or "approximately" includes the stated value as well as the average within the acceptable deviation range of the specified value, wherein the acceptable deviation range is as determined by one of ordinary skill in the art. Determined taking into account the measurement in question and the errors associated with the measurement of a particular quantity (ie, limitations of the measurement system).

As used herein, "parallel", "perpendicular", and "equal" include the stated situation and the situation similar to the stated situation, the range of the similar situation is within the acceptable deviation range, wherein the The acceptable deviation ranges are as determined by one of ordinary skill in the art taking into account the measurement in question and errors associated with measurement of the particular quantity (ie, 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°; Deviation within 5°. "Equal" includes absolute equality and approximate equality, where the difference between the two that may be equal is less than or equal to 5% of either within acceptable tolerances for approximate equality, for example.

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

Some embodiments of the present disclosure provide a display device 1000, and the display device 1000 may be a television, a notebook computer, a tablet computer, a mobile phone, a personal digital assistant (English: personal digital assistant; PDA for short), a navigator, a Wearable devices, augmented reality (English: Augmented Reality; abbreviation: AR) equipment, virtual reality (English: Virtual Reality; abbreviation: VR) equipment and any other products or components with display functions.

In some embodiments, referring to FIG. 1 , the above-mentioned display device 1000 may be a spliced display device, that is, the display device 1000 includes at least two mutually spliced display modules 100 to meet the user's demand for a large-size display device; for example, the application Large-scale splicing display devices in plazas, stations, conference rooms and other environments. The multiple display modules 100 included in the display device 1000 can perform single display (only one display module 100 displays), individual display, arbitrary combination display, full-screen combined display, and the like.

Exemplarily, referring to FIG. 1 , the display device 1000 may include four display modules 100 . When the display device 1000 is working, any one or more of the display modules 100 can be displayed. 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 will not be listed here.

Some embodiments of the present disclosure also provide a display module 100, and the display module 100 may be a liquid crystal display module (Liquid Crystal Display; LCD for short). Referring to FIG. 2A , the LCD includes a backlight module 110 and a display panel 120 that are stacked.

In some embodiments, referring to FIG. 2A, FIG. 2A is a cross-sectional view of one side of the display module 110; the backlight module 110 includes a rear case 10, a lamp panel 20, a quantum dot film 30, a shading member 40 and an optical film 50 .

The rear case 10 includes a base plate 11 and a plurality of side plates 12 arranged around the base plate 11 (only one side plate 12 is shown in FIG. 12 encloses an installation chamber 101 with an opening. The installation cavity 101 is used to install and protect other parts of the backlight module 110 (such as the lamp board 20, the quantum dot film 30, etc.).

Exemplarily, in some embodiments, the backlight module 110 has a rectangular structure, so that the rear case 10 includes a rectangular bottom plate 11, and four side plates 12 arranged around the bottom plate 11; the four side plates 12 are connected end to end in sequence . The opening of the installation cavity 101 is located on the edge of the side plate 12 away from the bottom plate 11 , so that components (such as the lamp board 20 , quantum dot film 30 , etc.) can be installed in the installation cavity 101 .

In some embodiments, the rear shell 10 can be stamped and formed by metal material or alloy material, so that the bottom plate 11 and the plurality of side plates 12 are integrally formed. Alternatively, the base plate 11 and multiple side plates 12 that are independent of each other can also be fabricated first, and then the base plate 11 and the multiple side plates 12 are fixedly connected (for example, welded) to form a whole. Embodiments of the present disclosure do not specifically limit this.

Referring to FIG. 2A , the lamp board 20 is located in the installation cavity 101 and disposed on the base plate 11 , that is, the lamp board 20 is disposed on the side of the base plate 11 close to the installation cavity 101 . The lamp board 20 includes a plurality of light emitting devices 21 arranged in an array, and the lamp board 20 is used as a light source of the backlight module 110 . When the lamp board 20 is working, the plurality of light emitting devices 21 emit light.

Among the plurality of light emitting devices 21 included in the lamp panel 20 , the interval between two adjacent light emitting devices 21 is D, and in some examples, 8mm≤D≤16mm. If the distance D is too small (such as less than 8mm), it is not conducive to the heat dissipation of the lamp board 20, and if the distance D is too large (such as greater than 16mm), it is not conducive to the backlight module 110 to form a uniform surface light source; based on the above reasons, 8mm≤D≤16mm. Exemplarily, the interval D between two adjacent light emitting devices 21 may be 8mm, 12mm, 14mm or 16mm, which will not be listed here.

The light emitting device 21 may adopt micro-LEDs, such as mini-LEDs or Micro-LEDs. Multiple light-emitting devices 21 can use the same light-emitting device to reduce the manufacturing difficulty of the lamp board 20, so that the multiple light-emitting devices 21 included in the lamp board 20 emit light of the same color when working. Exemplarily, the light emitting device 21 may be a mini-LED emitting blue light.

The quantum dot film 30 is disposed on the side of the light board 20 away from the bottom plate 11 , and the quantum dot film 30 is supported by a plurality of side plates 12 so that there is a first distance between the quantum dot film 30 and the light board 20 . The plurality of light emitting devices 21 included in the lamp panel 20 are a plurality of point light sources, and the uniformity of the light emitted by the lamp panel 20 is relatively poor in the sitting plane of the lamp panel 20 . The light emitted by the lamp panel 20 can be preliminarily mixed in the above-mentioned first interval, that is, the first interval can play a role of uniform light, so that the uniformity of the light emitted to different positions of the quantum dot film 30 can be improved.

In some embodiments, the first interval between the quantum dot film 30 and the light panel 20 is H1, where 6mm≤H1≤8mm. Exemplarily, the first interval H1 may be 6 mm, 7 mm, 7.5 mm, 8 mm, etc., which will not be listed here.

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

In some embodiments, referring to FIG. 2A , at least one of the 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 sequentially connected. The first extension section 121 is connected to the edge of the bottom plate 11 . The second extension section 122 and the first extension section 121 form a stepped structure to support the quantum dot film 30 . The third extension section 123 extends along a direction perpendicular to the bottom board 11 and away from the bottom board 11 . The step structure formed on the side plate 12 is conducive to the installation and fixing of the quantum dot film 30, for example, at least two opposite side plates 12 form a step structure, like this, the quantum dot film 30 can be directly lapped on the two side plates 12 The step structure (the second extension section 122 ) is fixed to the step structure by a fixing structure (such as glue or pressing sheet).

Exemplarily, each of the side panels 12 includes a first extension section 121, a second extension section 122 and a third extension section 123, and the first extension section 121 can be vertical to the bottom panel 11 and away from the bottom panel 11 direction extension. The second extension section 122 may extend along a direction parallel to the bottom plate 11 and away from the installation cavity 101 . The third extension section 123 may also extend along a direction perpendicular to the bottom board 11 and away from the bottom board 11 . That is to say, each side plate 12 is formed with a stepped structure, so that the quantum dot film 30 can be better supported, which is beneficial to improve the stability of the quantum dot film 30 .

In some embodiments, the quantum dot film 30 may include two water-oxygen barrier layers stacked together, and a quantum dot material layer disposed between the two water-oxygen barrier layers. The quantum dot film 30 is configured to perform color conversion on at least part of the light emitted by the lamp panel 20 . Wherein, the material of the water-oxygen barrier layer may be polyethylene terephthalate (PET for short).

As a light-emitting semiconductor crystal material, quantum dots have a narrow and adjustable photoluminescence spectrum, which can effectively convert blue light into blue light, green light and red light with high saturation. It can be used in the field of LCD to make LCD realizes high color gamut display.

Exemplarily, in the case that the plurality of 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, there will be no color conversion. In this way, after the color conversion by the quantum dot film 30, the emitted light includes blue light, red light and green light. Blue light, red light and green light are superimposed in a certain proportion and appear as 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 and emit it, and make the emitted three-color light appear white after being superimposed (mixed), and then provide a light source of white light for the display panel 120 .

In the reliable industry standard (reliable industry standard 60°C/90%RH, 1000h, blue light intensity 20mW/cm ² ), the failure edge width of the conventional quantum dot film 30 is about 1mm. That is, under water and oxygen erosion, the quantum dot film 30 may produce a failure region 31 with a width of about 1 mm.

Referring to FIG. 3 , a failure zone 31 with a width of about 1 mm is generated at the edge of the quantum dot film 30 . The quantum dot material in the invalidation area 31 cannot perform color conversion on the light, thus, the light passing through the invalidation area 31 still maintains the original color.

Exemplarily, in the case that the plurality of light emitting devices 21 included in the lamp panel 20 all emit blue light, the light passing through the ineffective area 31 still remains blue, and appears as blue. Part of the light that passes through other regions of the quantum dot film 30 (regions other than the ineffective area 31 ) is converted into red light and green light, and the part that is not converted remains blue, and passes through the quantum dot film 30 away from the light panel 20. One side appears as white light. In this way, the light passing through the quantum dot film 30 will appear colored (blue) at the edge region of the quantum dot film 30 , which is not conducive to displaying a picture of a preset color on the display panel 120 .

In order to solve the above problems, referring to FIG. 2A , a backlight module 110 provided by an embodiment of the present disclosure includes a light shielding member 40 . The shade 40 includes a fixing portion 41 and a light blocking portion 42 . The fixing portion 41 is connected to a plurality of side panels 12 to fix the light shielding element 40 on the side panels 12 of the rear case 10 .

The light blocking portion 42 abuts against the side of the quantum dot film 30 away from the bottom plate 11 (the upper surface of the quantum dot film 30 in FIG. 2A ), and along the circumferential direction 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 circumferential direction of the quantum dot film 30 to completely cover the circumferential edge of the quantum dot film 30 . The light shielding part 42 can block the circumferential edge of the quantum dot film 30 to prevent light from being emitted from the edge region of the quantum dot film 30. In this way, even if the ineffective area 31 appears on the edge of the quantum dot film 30, the light emitted by the lamp panel 20 will not It will pass through the quantum dot film 30 from the invalid area 31 . In this way, the risk of the light being colored after passing through the quantum dot film 30 can be reduced, so that the backlight module 110 can provide stable white light for the display panel 120 , and the stability of the backlight module 110 can be improved.

In some embodiments, the shading member 10 is made of opaque (for example, the light transmittance is less than 99%) material, such as aluminum, steel, etc.; The surface of the light part 42 is coated with a layer of light-absorbing material (such as black dye), such as a PET plate coated with black dye. The material of the above-mentioned light-shielding member 40 is beneficial to reduce the light transmittance of the light-shielding portion 42 and improve the light-shielding effect of the light-shielding portion 42 .

In some embodiments, the edge width of the light blocking portion 42 covering the quantum dot film 30 is 1 mm˜4 mm. The edge width of the light shielding portion 42 covering the quantum dot film 30 is greater than or equal to the failure edge width of the conventional quantum dot film 30 , thereby completely shielding the possible failure region 31 of the quantum dot film 30 . Exemplarily, the edge width of the light blocking portion 42 covering the quantum dot film 30 may be 1mm, 2mm, 2.5mm or 4mm, etc., which will not be listed here.

It should be understood that if the edge width of the light blocking part 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, and the backlight module 110 may have a wider dark edge, which will not It is beneficial to reduce the width of the side dark area (also called non-display area or frame area) of the display module 100 . Therefore, the light blocking part 42 of the embodiment of the present disclosure covers the edge width of the quantum dot film 30 in a range of 1 mm to 4 mm. In this way, the light blocking part 42 can effectively block the possible failure area 31 of the quantum dot film 30 without reducing the The light emitting area of the display module 110 is displayed.

The optical film 50 is disposed on a side of the light-shielding member 40 away from the bottom plate 11 , and has a second distance from the quantum dot film 30 . The light emitted by the quantum dot film 30 can be further mixed evenly in the second interval, and then directed to the optical film 50, thereby improving the uniformity of the light directed to the optical film 50, and allowing the light to enter the light blocking portion 42 The area on the side away from the lamp panel 20 allows light to be emitted from the side of the light blocking portion 42 away from the bottom plate 11, which is beneficial to improving the light emitting area of the backlight module 110 and reducing the dark side of the backlight module 110 (the area where no light is emitted). )width.

In some embodiments, the second distance between the optical film 50 and the quantum dot film 30 is H2, and H2≧4mm. Exemplarily, H2 is 4mm, 5mm, 5.5mm.

It should be understood that if the second interval H2 is too small (for example, less than 4mm), it is not conducive to uniform mixing of light in the second interval H2; therefore, H2≥4mm. With the gradual increase of H2 (for example, after it is greater than 8mm), the degree of light mixing in the second interval H2 reaches a higher level, and continuing to increase the second interval H2 will not significantly increase the degree of light mixing, but it will affect the backlight module. The thickness of 110 is not conducive to realizing the lightness and thinning of the display module 100; therefore, H2 should not be set too large. For example, 4mm≤H2≤8mm.

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 lamp panel 20 can be fully mixed and then emitted from the side of the optical film 50 away from the lamp panel 20 .

Exemplarily, the interval H1 between the quantum dot film 30 and the lamp panel 20 is 8mm; the second interval H2 between the optical film 50 and the quantum dot film 30 is 4mm; the interval between two adjacent light emitting devices 21 D is 14mm.

In some embodiments, the first interval H1 is greater than or equal to the second interval H2, so that the light emitted by the lamp panel 20 can be mixed more fully in the first interval H1, and the uniformity of the light incident on the quantum dot film 30 is improved, thereby enabling Light passing through the quantum dot film 30 can appear as white light.

The optical film 50 can further process the light, such as uniform light treatment and brightening treatment, etc., to further improve the uniformity of the light output of the backlight module 110, and reduce the lower brightness of the edge of the light output surface of the backlight module 110 (compared with the center of the light output surface). area) to improve the light uniformity of the backlight module 110 .

In some embodiments, the optical film 50 may include a second diffusion plate 51 . Alternatively, the optical film 50 includes a second diffusion plate 51 and an optical brightness enhancement film 52 that are laminated, and the second diffusion plate 51 is closer to the quantum dot film 30 than the optical brightness enhancement film 52 (as shown in FIG. 4 ).

Referring to FIG. 4, the optical film 50 shown in FIG. 4 includes a second diffusion plate 51 and an optical brightness enhancement film 52; the second diffusion plate 51 may include a glass substrate 511, and be coated on the glass substrate 511 away from the quantum dot film 30 ( The diffusion ink layer 512 on one side (the upper side in FIG. 4 ) of the base plate 11 ). The scattering and diffusion effect of the second diffusion plate 51 can be used to further uniformize the light incident on the second diffusion plate 51 , which is beneficial to improve the uniformity of light output from the light output surface of the backlight module 110 .

The glass substrate 511 with high structural strength is selected for the second diffuser plate 51, which is beneficial for the second diffuser plate 51 to 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 case 10 to enhance the display. Structural stability of the module 100.

Referring to FIG. 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 for short) 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 .

Exemplarily, the optical brightness enhancement film 52 may only include the prism sheet 521 ; or only include the reflective brightness enhancement film 522 ; or include a stacked arrangement of the prism sheet 521 and the reflection type brightness enhancement film 522 (as shown in FIG. 4 ).

Please refer to Table 1 below. Table 1 is a comparison of light output gains of the backlight module 110 when different optical films 50 are arranged at different positions.

Table 1:

It should be understood that QD in Table 1 refers to: quantum dot film (Quantum Dot; QD for short) 30; (P0°+P90°) refers to: prism sheet 521; DBEF refers to: reflective brightness enhancement film. The first position refers to: the position of the quantum dot film 30 shown in FIG. 2A (the position of the second extension 121 of the side plate 12); the second position refers to: the position of the optical film 50 in FIG. 2A (close to position of the display panel 110).

It can be seen from Table 1 above that when the quantum dot film 30 is only disposed at the first position, the light output brightness gain coefficient of the backlight module 110 is about 0.42, and the light output efficiency is relatively low. Setting the optical film 50 close to the quantum dot film 30 not only does not increase the light output efficiency of the backlight module 110 , but also reduces 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 luminance gain coefficient of the backlight module 110 is 0.73. The quantum dot film 30 is set at the first position, and the second position In the case where the prism sheet 521 and the reflective brightness enhancement film 522 are arranged at two positions, the light emitting brightness gain coefficient of the backlight module 110 is the largest (approximately 1).

In summary, it can be known that the optical film 50 superimposed with the prism sheet 521 and the reflective brightness enhancement film 522 is set at the second position, that is, when there is a second interval between the optical film 50 and the quantum dot film 30, the maximum improvement can be achieved. The light extraction efficiency of the backlight module 110 .

Wherein, the reflective brightness enhancement film 522 reflects part of the light back into the second space, and passes through the quantum dot film 30 from the second space to irradiate to one side of the light board 20 . In order to reduce light loss, the light extraction efficiency of the backlight module 110 is improved. In some embodiments, referring to FIG. 2A , the backlight module 110 further includes a reflective layer 60 . The reflective layer 60 is disposed on the surface of the lamp board 20 close to the installation cavity 101 and avoids the light-emitting devices 21 , that is, the reflective layer 60 is disposed 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-enhancing film 522, the light directed toward the bottom plate 11 is reflected by the reflective layer 60 and propagates toward the direction of the optical film 50 again, and finally passes through the optical film 50 and is away from the bottom plate from the optical film 50. 11 shoots out from one side. The luminous efficiency of the backlight module 110 is improved. Moreover, the light reflected by the reflective brightness enhancement film 522 back into the installation cavity 101 can be uniformly treated in the first interval and the second interval again, thereby further improving the uniformity of the light emitted by the backlight module 110 .

The backlight module 110 provided by the embodiment of the present disclosure, referring to FIG. 2A , the rear case 10 is used to form the installation cavity 101, and serves as a carrier of the backlight module 101, carrying and protecting other parts of the backlight module 110. The lamp board 20 is disposed in the installation cavity 101 for emitting light. The quantum dot film 30 is located on one side of the lamp panel 20, and has a first interval with the lamp panel 20. The first interval and the quantum dot film 30 together form a first light-mixing structure, and the light emitted by a plurality of light emitting devices 20 passes through the second A light mixing structure is used for mixing to improve the uniformity of emitted light. Moreover, the quantum dot film 30 can perform color conversion on at least part of the light emitted by the lamp panel 20, so that the light 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-shielding portion 42 of the light-shielding member 40 can block the circumferential edge of the quantum dot film 30 to prevent light from being emitted from the edge region of the quantum dot film 30, thereby reducing the problem that the light appears colored after passing through the quantum dot film 30, so that the backlight module 110 It can provide stable white light and improve the stability of the backlight module 110 . There is a second space between the optical film 50 and the quantum dot film 40 , and the second space and the optical film 50 together form a second light mixing structure. The light emitted by the quantum dot film 30 can be further mixed uniformly in the second interval, and then directed to the optical film 50 to improve the uniformity of the light, and also make the light shield 42 emit light from the side away from the bottom plate 11 . At the same time, the optical film 50 can further process the light, such as uniform light treatment and brightening treatment, etc., to further improve the uniformity of the light output of the backlight module 110, and avoid low brightness at the edge of the light output surface of the backlight module 110 (compared to The central region of the light emitting surface of the backlight module 110) improves the uniformity of the light output of the backlight module 110.

In some embodiments, the shading member 40 can be fabricated using the existing structure of the backlight module 110 (as shown in FIG. 2A ), or can also be fabricated as an independent component (as shown in FIG. 2B ).

Referring to FIG. 2A , when the shading member 40 is manufactured using the existing structure of the backlight module 110 , the fixing portion 41 of the shading member 40 is located on a side of the plurality of side plates 12 away from the installation cavity. And it is fixedly connected with the third extension section 123 of the side plate 12 . Exemplarily, referring to FIG. 2A , the fixing part 41 and the third extension section 123 can be connected and fixed by screws 102; in this way, threaded holes can be provided at positions corresponding to the fixing part 41 and the third extension section 123, so that the screws 102 can The two are fixedly connected. Along the circumferential direction of the fixing part and the side plate 12, a plurality of screws 102 can be arranged, and the number of screws 102 and the interval between two adjacent screws 102 can be designed according to actual requirements. It should be understood that, the fixing part 41 and the third extension section 123 may also be fixed by other connecting structure, such as a buckle structure.

The shade 40 also includes a supporting portion 43 and a connecting portion 44 . Referring to FIG. 2A , the supporting portion 43 is connected to the fixing portion 41 and extends away from the bottom plate 11, and is configured to support the optical film 50 and the display panel 120; One end of the connecting portion 44 is connected to the supporting portion 43 , and the other end is connected to the light blocking portion 42 , so as to connect the light blocking portion 42 , the fixing portion 41 and the supporting portion 43 into an integral structure. In some examples, the display panel 120 is fixedly connected to the optical film 50 through glue.

The shading member 40 can not only block the peripheral edge of the quantum dot film 30, but also support the optical film 50 and the display panel 120, which is beneficial to reduce the number of components of the backlight module 110 and reduce the difficulty of assembling the backlight module 110.

In some embodiments, referring to FIG. 2A , along a direction parallel to the quantum dot film 30 (horizontal direction in FIG. 2A ), part of the light blocking portion 42 protrudes from the edge of the quantum dot film 30 . The connection part 44 is connected with the part of the light blocking part 42 protruding 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 that the connection portion 44 blocks the quantum dot film 30 can be reduced.

In some embodiments, along the direction perpendicular to the quantum dot film 30 (the vertical direction in FIG. 2A ), the size of the part where the light blocking portion 42 covers the quantum dot film 30 is larger than the light blocking portion 42 extending out of the quantum dot film 30 The size of the part of the edge. In this way, the possibility of light passing through the light shielding portion 42 can be reduced by increasing the light shielding effect of the light shielding portion 42 covering the part of the quantum dot film 30; at the same time, the structural strength of the light shielding portion 42 can be increased to reduce the occurrence of possibility of deformation.

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

In some embodiments, referring to FIG. 2A , the surface of the support portion 43 close to the installation cavity 101 is connected to the surface of the connection portion 44 close to the installation cavity 101 , forming an arc protruding toward the side close to the installation cavity 101 . That is, the surface of the support part 43 and the connecting part 44 of the shading member 40 close to the installation cavity 101 is a convex arc surface, and the arc surface can better reflect light to various areas, so that it is beneficial to lift the shading member 40 away from the lamp panel 20 The degree of light uniformity on one side improves the uniformity of light on the side of the shading member 40 close to the installation cavity 101 .

In some embodiments, referring to FIG. 2A , the backlight module 110 further includes a diffuse reflection layer 70 . The diffuse reflection layer 70 covers at least part of the surfaces of the connection portion 44 and the support portion 43 near the installation cavity 101 . The part of the light reflected by the optical film 50 back into the second interval will be directed to the surface of the connection part 44 and the support part 43 close to the installation cavity 101, and the diffuse reflection layer 70 is arranged on the above-mentioned surface, which can prevent the above-mentioned part of the light from entering the connection part 44. Specular reflection occurs with the surface of the support portion 43 , and diffuse reflection occurs on the surface of the diffuse reflection layer 70 , which is beneficial to improve the uniform light effect in the second interval.

In some other embodiments, the surface roughness of the connection portion 44 and the support portion 43 close to the installation cavity 101 can also be increased by surface treatment technology (such as shot blasting), so that the light can be installed close to the connection portion 44 and the support portion 43. The surface of cavity 101 is diffusely reflected.

In some embodiments, the shading member 40 is an extruded aluminum profile. After the aluminum extruded profile is formed, it is beneficial to improve the dimensional accuracy and straightness of the shading member 40, improve the position accuracy of the rear shell 10 and the shading member 40, and improve the installation of the backlight module. Mounting accuracy of group 110. At the same time, the aluminum extruded profile has high structural strength, is not easy to deform, can effectively support the optical film 50 and the display panel 120, and is beneficial to improving the structural stability of the display module 100.

When the shade 40 is made as an independent component, referring to FIG. 2B , the fixing portion 41 is located on the side of the side plate 12 close to the installation cavity 101 . Exemplarily, as shown in FIG. 2B , the fixing portion 41 is fixedly connected to the second extension section 122 of the side plate 12 . Exemplarily, the fixing part 41 and the side plate 12 may be connected and fixed by screws (not shown in the figure). It should be understood that the fixing portion 41 may also be fixedly connected to the third extension section 123 of the side plate 12 . In the case that the shading member 40 is made as an independent component, referring to FIG. 2B , the backlight module 110 further includes a support frame 80 for supporting the optical film 50 and the display panel 120 . The support frame 80 is disposed around the side panels 12 and includes a mounting portion 81 , a bearing portion 82 and an extension portion 83 .

The mounting portion 81 is located on a side of the multiple side plates 12 away from the mounting cavity 101 , and is fixedly connected to the multiple side plates 12 . The carrying portion 82 is connected to the mounting portion 81 and extends away from the bottom plate 11 , and is configured to support the optical film 50 . One end of the extension portion 83 is connected to the carrying portion 82 , and the other end is abutted against the fixing portion 41 of the shade 40 .

It should be understood that, referring to FIG. 2B , there is an installation gap between the edge of the quantum dot film 30 and the third side plate 123, and the fixing portion 41 of the light-shielding member 40 can be arranged in the installation gap, and is connected to the second extension of the side plate 12. Segments 122 fit and connect securely.

The light shielding member 40 is an independent structural member, and 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 the supporting frame 80 . The shading member 40 and the support frame 80 are simple in structure and less difficult to process.

In some embodiments, referring to FIG. 2A , in order to improve the uniformity of light emitted from the lamp panel 20 to the quantum dot film 30 , the backlight module 110 further includes a first diffuser 90 , and the first diffuser 90 is disposed on the quantum dot film. 30 is close to one side of the lamp panel 20 , and the first diffusion plate 90 is supported by a plurality of side plates 12 . The first diffuser plate 90 is used for light uniformity, so as to improve the uniformity of the light incident on the quantum dot film 30 .

In some embodiments, the first diffusion plate 90 is disposed on the stepped structure (the second extension section 122 of the side plate 12 ), and is attached to the surface of the quantum dot film 30 close to the bottom plate 11 . The first diffusion plate 90 may also serve to support the quantum dot film 30 .

In some embodiments, the first diffuser plate 90 is fixedly connected to the second extension section 122 by glue, and the light shielding portion 42 of the light shielding member 40 presses the edge of the quantum dot film 30 onto the first diffuser plate 90, and at the same time presses the second extension section 122 A diffuser plate 90 is pressed against the second extension 122 of the side plate 12 . In this way, it is beneficial to simplify the connection structure between the quantum dot film 30 and the first diffuser plate 90 , simplify the installation process of the backlight module 110 , and improve the assembly efficiency of the backlight module 110 .

The first diffusion plate 90 may be a polystyrene (Polystyrene; PS for short) diffusion plate. Compared with the cost of the first diffusion plate 51 (including the glass substrate 511 and the ink layer 512 ), the cost of the PS diffusion plate is lower, which is beneficial to reduce the production cost of the backlight module 110 .

In some embodiments, the backlight module 110 further includes a plurality of support columns 111, referring to FIG. A diffuser plate 90 is in contact with the surface close to the lamp panel 20 . The supporting columns 111 are used to support the first diffuser plate 90 to reduce the risk of deformation of the first diffuser plate 90 . Wherein, one end of the support column 111 connected to the lamp panel 20 is disposed in the gap between the plurality of light emitting devices 20 .

Exemplarily, along a direction perpendicular to the lamp panel 20 and away from the lamp panel 20 , the cross-sectional size of the support column 111 may gradually decrease, so as to reduce the shading area of the support column 90 to the light incident on the first diffuser plate 90 .

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

The number and arrangement density of the support columns 111 can be adjusted according to actual needs. Exemplarily, when the first diffuser plate 90 is a PS diffuser plate, the first diffuser plate 90 is poor in rigidity and prone to bending deformation, and the density of the support columns 90 can be appropriately increased. For example, when the size of the display module 100 is 55 inches, the number of support columns 111 can be 12.

In some other embodiments, the backlight module 110 can also include a second support column, the second support column is arranged between the quantum dot film 30 and the optical film 50, and is used to support the optical film 50 and the display panel 120, reducing the The risk of bending deformation of the optical film 50 and the display panel 120 occurs.

Exemplarily, a second support column can be provided at the position where the support column 111 is provided, that is, the vertical projection of the second support column on the bottom plate 11 and the vertical projection of the support column 111 on the bottom plate 11 at least partially overlap, so that the optical The compressive stress on the diaphragm 50 can be transferred to the bottom plate 11 through the supporting pillars 111 , so as to improve the structural stability of the backlight module 110 .

In some embodiments, referring to FIG. 5 , at least one side panel 12 of the plurality of side panels 12 is a first side panel 12A, and the remaining side panels are second side panels 12B. Referring to FIG. 2A , the backlight module 110 further includes a frame 13 . The frame 13 is disposed on the side of the first side plate 12A away from the installation cavity 101 , and includes a first subsection 131 , a second subsection 132 and a third subsection 133 connected in sequence. The first sub-section 131 is fixedly connected to the side plate 12, there is a third interval between the second sub-section 132 and the first side plate 12A, the third interval is H3, the third sub-section 133 is perpendicular to the second sub-section 132 and Extending toward the direction close to the first side plate 12A (horizontally from right to left in FIG. 2 ); an accommodating chamber 104 is enclosed between the frame 13 and the first side plate 12A. The frame 13 is used to form the accommodating chamber 104 and protect the structural components in the accommodating chamber 104 . Exemplarily, the accommodating cavity 104 is configured to install the circuit board 130 of the display module 100 .

For example, referring to 2A, the fixing portion 41 of the shade 40 is located on the side of the third extension 123 of the side plate 12 away from the installation cavity 101 , and the fixing portion 41 is fixedly connected to the third extension 123 . The first subsection 131 can be disposed on a side of the fixing part 41 away from the third extension section 123 , and be fixedly connected with the fixing part 41 . For example, the positions corresponding to the first subsection 131, the fixing part 41 and the third extension section 123 are provided with interconnected threaded holes, and the first subsection 131, the fixing part 41 and the third extension section 123 are fixedly connected by screws. .

In some embodiments, the backlight module 110 includes four side panels 12 arranged in a rectangle, two adjacent side panels are first side panels 12A, and the other two side panels are second side panels 12B. That is, two accommodating cavities 104 are provided on adjacent two sides of the backlight module 110 .

In some embodiments, referring to FIG. 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 with the display panel 120 .

Exemplarily, the display module includes two groups of circuit boards 130 , and the two groups of circuit boards 130 are respectively disposed in the two accommodating cavities 104 . The flexible circuit board can be chip on film (Chip On Film; COF for short), and the flexible circuit board is flexible and very thin (take COF as an example, the thickness is less than 0.2mm). The flexible circuit board 140 can pass between the first subsection 131 and the fixing part 41, so that one end of the flexible circuit board 140 can be electrically connected to the circuit board 130 located inside the receiving cavity 104, and the other end can be electrically connected to the circuit board 130 located outside the receiving cavity 104. The display panel 120 is electrically connected. It should be understood that, along the extension direction of the first side plate 12A, the flexible circuit board 140 may be disposed between two adjacent screws 102 to avoid mutual interference between the flexible circuit board 140 and the screws 102 .

In some embodiments, referring to FIG. 5 , there is a fourth gap 105 between the circuit board 130 and the third extension 123 of the side plate 12 , in order to reduce the collision between the circuit board 130 and the surface of the third extension 123 close to the receiving cavity 104 . The display module 100 also includes a buffer block 150 . The buffer block 150 is filled in the fourth space 105 between the circuit board 130 and the third extension section 123 to limit the vibration of the circuit board 130 and reduce the risk of damage to the circuit board 130 .

In some embodiments, referring to FIG. 5 , the display module 110 further includes a protective film 160 disposed on the circumference of the backlight module 110 and the display panel 120 . The protective film 160 includes a portion extending perpendicular to the display panel 120 and the bottom plate 11 of the rear case 10 to provide a flat side for the display module 110 .

On the side close to the first side panel 12A, the side of the second sub-section 132 of the frame 13 away from the first side panel 12A is approximately flush with the edge of the display panel 110 , and one end of the protective film 160 is connected to the edge of the display panel 120 (such as bonding), and the other end is connected (such as bonding) to the surface of the third subsection 133 away from the display panel 120 .

On the side close to the second side plate 12B, the display module 110 further includes a spacer 170, the spacer 170 is arranged on the side of the first extension section 121 of the second side plate 12B away from the installation cavity 101, and along the One side of the spacer 170 is fixedly connected to the first extension section 121 , and the other side is substantially flush with the edge of the display panel 110 . And along a direction perpendicular to the display panel 110 (the vertical direction in FIG. 5 ), the spacer 170 is away from the surface of the display panel 110 and is substantially flush with at least part of the bottom plate 11 of the rear case 10 . One end of the protective film 160 is connected to the edge of the display panel 110 , and the other end is connected (for example, bonded) to the surface of the spacer 170 away from the display panel 110 .

Exemplarily, the protective film 160 may be an aluminum foil tape.

In some embodiments, as shown in FIG. 2A, due to the homogenization effect of the second interval H2 and the optical film 50, the light rays injected into the second interval H2 by the quantum dot film 30 can be evenly distributed in 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 plate 12, the size of the support portion 43 of the shading member 40 can be gradually reduced along the direction 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, the width of the dark side of the backlight module 110 can be reduced, and it is beneficial for the display module 100 to achieve a narrow frame.

Exemplarily, referring to FIG. 5 and FIG. 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 1001, and the side where the second side panel 12B is located is Second side 1002. The width of the non-display area (dark edge area) of the first side 1001 is smaller than the width of the non-display area of the second side 1002 .

In some embodiments, in the display device 1000 , referring to FIG. 6 , among the two adjacent sides of two adjacent display modules 100 , one is the first side 1001 and the other is the second side 1002 , in this way, it is beneficial to uniform the joint widths of multiple display modules 100 .

Exemplarily, in the case of using the backlight module 110 provided by the embodiments of the present disclosure, the width of the non-display area (dark edge area) of the first side 1001 can be made about 0.6 mm with the existing processing technology, and the The width of the non-display area of the second side 1002 is about 0.4 mm. In this way, the width of the splicing seam in the display device 1000 is about 1 mm, so that the display device 1000 realizes a narrow splicing seam. It is beneficial to improve the user experience.

The above is only a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Anyone familiar with the technical field who thinks of changes or substitutions within the technical scope of the present disclosure should cover all within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be determined by the protection scope of the claims.

Claims

A backlight module, comprising:

The rear shell includes a bottom plate and a plurality of side plates arranged around the bottom plate, the plurality of side plates are connected to the edge of the bottom plate, and the bottom plate and the plurality of side plates enclose an installation cavity with an opening;

The lamp board is located in the installation cavity and is arranged on the base plate, including a plurality of light emitting devices arranged in an array;

The quantum dot film is arranged on the side of the light board away from the bottom plate; the plurality of side plates support the quantum dot film, so that there is a first interval between the quantum dot film and the light board; The quantum dot film is configured to perform color conversion on at least part of the light emitted by the lamp panel;

The light-shielding member includes a fixing part and a light-shielding part; the fixing part is connected to the plurality of side plates; the light-shielding part abuts against the side of the quantum dot film away from the bottom plate, and along the quantum dot In the circumferential direction of the film, the light blocking part covers the edge of the quantum dot film;

The optical film is arranged on the side of the shading member away from the bottom plate, and has a second distance from the quantum dot film.
The backlight module according to claim 1, wherein the fixing part is located on a side of the plurality of side plates away from the installation cavity;

The shade also includes:

a supporting part, connected to the fixing part, extending in a direction away from the bottom plate, and configured to support the optical film;

A connection part, one end of the connection part is connected to the support part, and the other end is connected to the light blocking part.
The backlight module according to claim 2, wherein, along a direction parallel to the quantum dot film, part of the light shielding part protrudes from the edge of the quantum dot film;

The connection part is connected with the part of the light blocking part protruding from the edge of the quantum dot film.
The backlight module according to claim 3, wherein, the surface of the supporting part close to the installation cavity is connected with the surface of the connecting part close to the installation cavity, forming a protrusion toward the side close to the installation cavity. arc surface.
The backlight module according to any one of claims 2-5, further comprising:

The diffuse reflection layer covers at least part of the surfaces of the connecting part and the supporting part close to the installation cavity.
The backlight module according to claim 1, wherein the fixing part is located on a side of the plurality of side plates close to the installation cavity.
The backlight module according to claim 6, further comprising:

The support frame is arranged around the plurality of side plates, including a mounting portion, a bearing portion and an extension portion; the mounting portion is located on a side of the multiple side plates away from the installation cavity, and is connected to the multiple side plates fixed connection; the bearing part is connected with the mounting part, and extends away from the bottom plate, and is configured to support the optical film; one end of the extension part is connected with the bearing part, and the other end is connected with the bearing part The fixing portion of the shade is abutted against.
The backlight module according to any one of claims 1-7, wherein at least one side panel comprises a first extension section, a second extension section and a third extension section arranged in sequence along a direction away from the bottom panel, 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 stepped structure to support the quantum dot film; the third extension section is perpendicular to the the base plate and extend in a direction away from the base plate.
The backlight module according to claim 8, wherein the fixing part is located on a side of the side plate away from the installation cavity, and the fixing part is fixedly connected to the third extension section.
The backlight module according to any one of claims 1-9, further comprising:

The first diffusion plate is arranged on the side of the quantum dot film close to the bottom plate, and the plurality of side plates support the first diffusion plate.
The backlight module according to claim 10, wherein the quantum dot film is in direct contact with the first diffusion plate, and the light blocking part presses the quantum dot film on the first diffusion plate .
The backlight module according to any one of claims 1-11, further comprising:

A plurality of support columns are arranged between the lamp board and the first diffusion board, one end is connected to the lamp board, and the other end is in contact with the surface of the first diffusion board close to the lamp board.
The backlight module according to any one of claims 1-12, wherein the edge width of the light-shielding part covering the quantum dot film is 1mm-4mm.
The backlight module according to any one of claims 1-13, wherein the first interval is H1, the second interval is H2, and H1≥H2.
The backlight module according to any one of claims 1-14, wherein the optical film comprises a second diffusion plate; or,

The optical film includes a second diffusion plate and an optical brightness enhancement film stacked, and the second diffusion plate is closer to the bottom plate than the optical brightness enhancement film.
The backlight module according to claim 15, wherein,

The second diffusion plate includes a glass substrate, and a diffusion ink layer coated on the 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.
The backlight module according to any one of claims 1-16, wherein at least one of the plurality of side panels is a first side panel;

The backlight module also includes:

The frame is arranged on the side of the first side plate away from the installation cavity, and includes a first subsection, a second subsection and a third subsection connected in sequence; the first subsection and the first side The plates are fixedly connected, and there is a third interval between the second subsection and the first side panel, and the third subsection is along a direction perpendicular to the second subsection and close to the first side panel Extending; an accommodating cavity is enclosed between the frame and the first side plate.
A display module, comprising:

The backlight module according to any one of claims 1-17;

The display panel is arranged on the side of the optical film of the backlight module away from the bottom plate.
The display module according to claim 18, wherein the backlight module comprises an accommodating cavity;

The display module also includes:

The circuit board is arranged in the accommodating cavity;

The flexible circuit board is configured to electrically connect the circuit board and the display panel.
A display device comprising at least two display modules as claimed in claim 18 or 19, at least two display modules are spliced together.