Backlight structure, display module, spliced screen and display device

Abstract

The invention discloses a backlight structure, a display module, a spliced screen and a display device, belongs to the technical field of display, and can solve the problems that a shadow area is easy to appear on an existing display picture and the edge is blued. The backlight structure comprises a back plate (101), a lamp panel (102) and a fluorescent reflection strip (103), the back plate (101) comprises a main body part (1011) and a bent part (1012) connected with the main body part (1011); the lamp panel (102) is located on the main body part (1011); the lamp panel (102) comprises: a plurality of light emitting devices (1021) arranged in an array; the lamp panel (102) is provided with an edge area close to the bent part (1012); the fluorescent reflection strips (103) are located between the side faces, close to the light-emitting devices (1021), of the bent parts (1012) and the adjacent columns of light-emitting devices (1021) in the edge area of the lamp panel (102).

Description

Backlight structure, display module, spliced ​​screen and display device Technical Field

[0001] The present disclosure belongs to the field of display technology, and particularly relates to a backlight structure, a display module, a spliced ​​screen, and a display device. Background Art

[0002] Mini Light-Emitting Diode (Mini LED) technology has excellent performance in display products. Currently, Mini LED has been widely used in display scenarios such as commercial displays, high-end TVs, and cinemas. As a type of commercial display, splicing screens have also become a development trend by introducing Mini LED backlight technology to iterate and upgrade product performance. The product feature of splicing screens is narrow bezels. Currently, the market is divided into three series according to the size of the splicing seam: 3.Xmm, 1.Xmm, and 0.Xmm. Among them, the 0.Xmm extremely narrow splicing seam belongs to the high-end series. From the perspective of market positioning, it is very suitable to be equipped with Mini LED technology to achieve high brightness, high contrast, and high color gamut image quality improvement.

[0003] Summary of the Invention

[0004] The present disclosure aims to solve at least one of the technical problems existing in the prior art, and provides a backlight structure, a display module, a spliced ​​screen and a display device.

[0005] In a first aspect, an embodiment of the present disclosure provides a backlight structure, wherein the backlight structure includes: a back panel, a light panel, and a fluorescent reflective strip;

[0006] The back plate includes: a main body portion and a bending portion connected to the main body portion;

[0007] The light board is located on the main body; the light board includes: a plurality of light emitting devices arranged in an array; the light board has an edge area close to the bent portion;

[0008] The fluorescent reflective strip is located between the side of the bent portion close to the light emitting device and the adjacent columns of the light emitting devices in the edge area of ​​the light board.

[0009] Optionally, the light panel further has a central area;

[0010] The driving current of the light emitting device in the edge area is greater than the driving current of the light emitting device in the central area.

[0011] Optionally, the edge area is divided into a plurality of dimming areas;

[0012] Along a direction away from the bending portion, the driving current of the light emitting devices in the plurality of dimming zones decreases step by step.

[0013] Optionally, the backlight structure further includes: a plurality of black dots;

[0014] The black dots are located on the fluorescent reflector between adjacent columns of the light emitting devices in the edge region; or, the black dots are located between adjacent rows of the light emitting devices near the bending portion in the edge region.

[0015] Optionally, the backlight structure further includes: a driving board; the driving board is located on a side of the main body away from the light board, and is electrically connected to the light-emitting device in the light board through a via hole penetrating the main body.

[0016] Optionally, the backlight structure further comprises: a frame; the frame comprises: a fixing portion and a supporting portion connected to the fixing portion;

[0017] The fixing portion is located on a side of the bending portion away from the light emitting device and is fixedly connected to the bending portion;

[0018] The supporting portion is connected to the fixing portion, and a first receiving groove is formed on a side of the fixing portion close to the light emitting device to accommodate the bent portion;

[0019] The supporting portion comprises a bottom surface connected to the fixing portion, and a top surface arranged opposite to the bottom surface;

[0020] The area of ​​the top surface is smaller than the area of ​​the bottom surface.

[0021] Optionally, the support portion further comprises a side surface connecting the bottom surface and the top surface and close to the light emitting device; the backlight structure further comprises: a reflective sheet;

[0022] The reflective sheet is located on the side surface of the supporting portion.

[0023] Optionally, the backlight structure further comprises: a protective cover plate; the protective cover plate, the main body portion and the bent portion of the back plate form a protective cavity to accommodate the driving board;

[0024] The supporting portion and the fixing portion form a second receiving groove on a side of the fixing portion away from the light emitting device to receive the protection cover.

[0025] In a second aspect, an embodiment of the present disclosure provides a backlight structure, wherein the backlight structure includes: a back plate, a light plate, a fluorescent reflective strip, a plurality of black dots, a driving plate, a frame, a reflective sheet, and a protective cover plate;

[0026] The back plate includes: a main body portion and a bending portion connected to the main body portion;

[0027] The light board is located on the main body; the light board includes: a plurality of light emitting devices arranged in an array; the light board has an edge area close to the bent portion;

[0028] The fluorescent reflective strip is located between the side of the bent portion close to the light emitting device and the adjacent rows of light emitting devices in the edge area of ​​the light board;

[0029] The black dots are located on the fluorescent reflector between adjacent columns of the light-emitting devices in the edge region; or the black dots are located between adjacent rows of the light-emitting devices near the bending portion in the edge region;

[0030] The driving board is located on a side of the main body away from the light board, and is electrically connected to the light emitting device in the light board through a through hole penetrating the main body;

[0031] The frame includes: a fixing portion and a supporting portion connected to the fixing portion;

[0032] The fixing portion is located on a side of the bending portion away from the light emitting device and is fixedly connected to the bending portion;

[0033] The supporting portion is connected to the fixing portion, and a first receiving groove is formed on a side of the fixing portion close to the light emitting device to accommodate the bent portion;

[0034] The supporting portion comprises a bottom surface connected to the fixing portion, and a top surface arranged opposite to the bottom surface;

[0035] The area of ​​the top surface is smaller than the area of ​​the bottom surface;

[0036] The support portion further comprises a side surface connecting the bottom surface and the top surface and close to the light emitting device;

[0037] The reflective sheet is located on the side surface of the supporting portion;

[0038] The protective cover plate, the main body portion of the back plate and the bent portion form a protective cavity to accommodate the driving board;

[0039] The supporting portion and the fixing portion form a second receiving groove on a side of the fixing portion away from the light emitting device to receive the protection cover.

[0040] In a third aspect, an embodiment of the present disclosure provides a display module, wherein the display module includes the backlight structure provided above.

[0041] Optionally, the display module further comprises: a quantum dot diffusion plate;

[0042] The quantum dot diffusion plate is located on the support portion of the frame and is in contact with the top surface of the support portion;

[0043] The quantum dot diffusion plate includes: a base substrate, a color conversion film, and a brightness enhancement film, which are sequentially arranged along a direction away from the top surface of the support portion.

[0044] Optionally, the color conversion film is a quantum dot material layer or a phosphor film;

[0045] The central wavelength of the quantum dot material layer is the same as the central wavelength of the fluorescent reflective strip;

[0046] The phosphor film and the fluorescent reflective strip are made of the same material.

[0047] Optionally, the display module further comprises: a liquid crystal display panel; the liquid crystal display panel is located on a side of the quantum dot diffusion plate away from the light emitting device;

[0048] The liquid crystal display panel includes: an array substrate, a color filter substrate, a liquid crystal layer, a first polarizer, and a second polarizer;

[0049] The array substrate and the color filter substrate are arranged in a box;

[0050] The liquid crystal layer is located between the array substrate and the color filter substrate;

[0051] The first polarized light is located on a side of the array substrate facing away from the color filter substrate;

[0052] The second polarizer is located on a side of the color filter substrate facing away from the array substrate.

[0053] In a fourth aspect, an embodiment of the present disclosure provides a display module, wherein the display module includes the backlight structure provided above; the display module further includes: a quantum dot diffuser plate and a liquid crystal display panel;

[0054] The quantum dot diffusion plate is located on the support portion of the frame and is in contact with the top surface of the support portion;

[0055] The liquid crystal display panel is located on a side of the quantum dot diffusion plate away from the light emitting device;

[0056] The quantum dot diffusion plate comprises: a base substrate, a color conversion film and a brightness enhancement film arranged in sequence along the direction away from the top surface of the support portion;

[0057] The liquid crystal display panel includes: an array substrate, a color filter substrate, a liquid crystal layer, a first polarizer, and a second polarizer;

[0058] The array substrate and the color filter substrate are arranged in a box;

[0059] The liquid crystal layer is located between the array substrate and the color filter substrate;

[0060] The first polarized light is located on a side of the array substrate facing away from the color filter substrate;

[0061] The second polarizer is located on a side of the color filter substrate facing away from the array substrate.

[0062] In a fifth aspect, an embodiment of the present disclosure provides a spliced ​​screen, wherein the spliced ​​screen includes a plurality of display modules as provided above.

[0063] In a sixth aspect, an embodiment of the present disclosure provides a display device, wherein the display device includes the spliced ​​screen provided above. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] FIG1a is a schematic structural diagram of an exemplary spliced ​​screen.

[0065] FIG1 b is an enlarged schematic diagram of the splicing seam area of ​​the splicing screen shown in FIG1 .

[0066] FIG. 2 is a brightness curve of the spliced ​​screen shown in FIG. 1 a in the splicing area.

[0067] FIG3 a is a schematic diagram showing the structure and display effect of an ideal optical architecture.

[0068] FIG3 b is a schematic diagram of the structure and display effect of the actual optical architecture.

[0069] Figure 4 is a schematic diagram of the experimental analysis and mechanism of the blueing of the edge area of ​​the spliced ​​screen.

[0070] FIG5 is a schematic structural diagram of a backlight structure provided by an embodiment of the present disclosure.

[0071] FIG6 a is a schematic diagram of spectra of different phosphor concentrations.

[0072] FIG6 b is a schematic diagram of the chromaticity and color coordinates of phosphors with different concentrations.

[0073] FIG7 a is a schematic diagram showing the edge color coordinate distribution of a display screen when a backlight structure without fluorescent reflective strips is applied to a spliced ​​screen.

[0074] FIG7 b is a schematic diagram showing the edge color coordinate distribution of a display image when a backlight structure with fluorescent reflective strips is applied to a spliced ​​screen.

[0075] FIG8 a is a schematic diagram of a brightness curve of an actual optical architecture.

[0076] FIG8 b is a schematic diagram of a brightness curve of an actual optical structure after adjusting the driving current of the light-emitting device in the edge area.

[0077] FIG8 c is a schematic diagram of a brightness curve of an actual optical structure after adjusting the driving current of the light-emitting device in the edge area and adding black dots.

[0078] FIG9 is a schematic structural diagram of a display module provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0079] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0080] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by people with ordinary skills in the field to which this disclosure belongs. The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0081] Figure 1a is a schematic structural diagram of an exemplary splicing screen, and Figure 1b is an enlarged schematic diagram of the splicing area of ​​the splicing screen shown in Figure 1. As shown in Figures 1a and 1b, the splicing screen can be composed of four independent display modules composed of Mini LED backlight structures and liquid crystal display panels. There is obvious brightness attenuation at the edge of a single display module, forming a shadow area at the edge of the display screen.

[0082] The splicing screen shown in Figure 1a can have a gap of 0.Xmm. Specifically, its actual physical gap is 2 to 3 pixels. Figure 2 shows the brightness curve of the splicing screen shown in Figure 1a in the gap area. As shown in Figure 2, when the splicing screen is in display mode, the shadow area at the edge of the display image directly extends to more than 5 pixels.

[0083] Figure 3a is a schematic diagram of the structure and display effect of an ideal optical architecture, and Figure 3b is a schematic diagram of the structure and display effect of an actual optical architecture. As shown in Figure 3a, for traditional non-Mini LED direct-lit backlight structures, the solution to achieving improved peripheral brightness uniformity is usually to set the distance A between the light-emitting devices at the edge of the light panel and the edge of the back panel to approximately 1 / 2 of the distance B between adjacent light-emitting devices. This ensures that the light energy in the edge area is essentially the same as that in the center area. In this way, the brightness curve in the edge area has a small attenuation area, and there is no shadow at the edge of the image. However, for Mini LED backlight structures, due to the large number of light-emitting devices, the distance B between adjacent light-emitting devices is generally on the order of 10mm. If the distance A between the light-emitting devices at the edge of the light panel and the edge of the back panel is still set to approximately 1 / 2 of the distance B between adjacent light-emitting devices, the distance A between the light-emitting devices at the edge of the light panel and the edge of the back panel should be approximately 5mm. As shown in Figure 3b, in the actual optical architecture, structural components such as a back panel, middle frame, screws, and protective plate need to be placed outside the light-emitting devices at the edge of the light panel. This is especially true for COG light panels. Due to process limitations on the flexible circuit board binding side, the distance between the light-emitting devices at the edge of the light panel and the edge of the light panel is more than 5mm. Therefore, the distance A between the light-emitting devices at the edge of the light panel and the edge of the back panel reaches about 15mm, which is much larger than 5mm. The edge brightness curve has a large attenuation area, and a shadow area is generated at the edge of the picture, making the overall visual seam much larger than the physical seam, which greatly affects the display effect and reduces the user experience.

[0084] When the backlight source in the spliced ​​screen adopts a direct backlight structure, in order to be used with quantum dot materials, the light emitted by the light-emitting device is blue, and the edge area is prone to bluish phenomenon, especially when the mixing distance is relatively large, such as more than 10mm.

[0085] Figure 4 illustrates the experimental analysis and mechanism of the bluish tint at the edges of a spliced ​​screen. As shown in Figure 4, when only a single subarea is illuminated, the measured brightness and chromaticity distribution curves show that the center of the single-area spot is high in brightness and has low color coordinates (bluish tint), while the brightness at the edges decreases and the color coordinates increase (yellowish tint). As shown in the theoretical model in the figure, since the red and green light (synthetic yellow light) excited by the quantum dot layer is scattered light, the backscattered yellow light mixes and extends toward the edge of the spot. As a result, the single spot exhibits a non-uniform color with a bluish center and yellowish edges. When a large area is illuminated, the image can be decomposed into the effect of two-dimensional superposition of individual light spots. As can be seen from the theoretical model in the figure, because less yellow light reaches the edges than the center, the edges of the screen appear visually bluish. The measured brightness and color coordinates of the illuminated area decrease at the edges. Increasing the illuminated area until the entire screen is illuminated persists. When the entire surface is lit, the driving current of the edge area is increased. The results show that the edge brightness is improved compared to the case of lighting a large area, but the proportion of yellow light in the edge area is lower, and it appears bluer visually.

[0086] In order to solve at least one of the above-mentioned technical problems, the embodiments of the present disclosure provide a backlight structure, a display module, a spliced ​​screen and a display device. The backlight structure, display module, spliced ​​screen and display device provided by the embodiments of the present disclosure will be further described in detail below in combination with the accompanying drawings and specific implementation methods.

[0087] In the first aspect, an embodiment of the present disclosure provides a backlight structure. FIG5 is a structural schematic diagram of the backlight structure provided by an embodiment of the present disclosure. As shown in FIG5 , the backlight structure includes: a back panel 101, a lamp board 102 and a fluorescent reflective strip 103; the back panel 101 includes: a main body 1011, and a bending portion 1012 connected to the main body 1011; the lamp board 102 is located on the main body 1011; the lamp board 102 includes: a plurality of light-emitting devices 1021 arranged in an array; the lamp board 102 has an edge area close to the bending portion 1012; the fluorescent reflective strip 103 is located between the side surface 1012a of the bending portion 1012 close to the light-emitting device 1021 and the adjacent columns of light-emitting devices 1021 in the edge area of ​​the light board 102.

[0088] The back panel 101 can be made of a metal material with relatively high strength, for example, it can be made of a stainless steel plate, an aluminum plate or a galvanized steel plate, and its thickness can be 0.1mm to 0.15mm. The back panel 101 can be processed by a stamping process, etc., so that the back panel 101 is bent to form a main body 1011 and a bending portion 1012 connected to the main body 1011. Among them, the main body 1011 can be on a first plane, the bending portion 1012 can be on a second plane, and the first plane and the second plane can intersect, for example, the first plane and the second plane are perpendicular to each other, that is, the main body 1011 and the bending portion 1012 are perpendicular to each other. It can be understood that the bending angle between the main body 1011 and the bending portion 1012 can also be other angles, which can be set according to actual needs and is no longer limited here.

[0089] The light board 102 can provide a backlight source, which may include a plurality of light-emitting devices 1021 arranged in an array. The light-emitting device 1021 may specifically be a mini light-emitting diode (Mini Light-Emitting Diode, Mini LED), specifically a blue light Mini LED, which can emit blue light and can be converted into white light in conjunction with structures such as a quantum dot conversion layer. Mini LED has the advantages of a large number of partitions, high brightness, and high dynamic contrast. The light board 102 may also include a flexible printed circuit (FPC) connected to the Mini LED. The Mini LED can be connected to an external circuit through the FPC to provide a driving current for the Mini LED and drive the Mini LED to emit light. Of course, the Mini LED can also be connected to a printed circuit board (PCB), and its function is the same as that of the above-mentioned FPC, which will not be repeated here. The light board 102 has an edge area close to the bend 1012. The edge area may correspond to the shadow area at the edge of the display screen, and generally 5 to 10 columns of Mini LEDs may be provided.

[0090] The fluorescent reflective strip 103 can be made of a reflective sheet material such as foamed polyethylene terephthalate (PET) as a substrate, with phosphor ink printed on the surface via a screen printing process. The phosphor ink can be made of yttrium aluminum garnet (YAG), silicate, or nitride materials commonly used in white light LEDs, including a mixture of red and green phosphors. The phosphor's center wavelength is the same as the quantum dot material in the quantum dot material layer it is used in. Typically, the red phosphor's center wavelength is 625nm, and the green phosphor's center wavelength is 535nm. The phosphor ink is made from a mixture of a resin solvent, phosphor, and additives. After screen printing, ultraviolet curing is generally used to form a film. The concentration of the phosphor ink and the width of the fluorescent reflective strip 103 used can be determined based on the width of the edge shadow area. The higher the phosphor concentration, the greater the increase in the color coordinates at the corresponding position, and the higher the degree of color compensation. Figure 6a is a schematic diagram of the spectrum of different phosphor concentrations, and Figure 6b is a schematic diagram of the chromaticity and color coordinates of phosphors of different concentrations. According to the relationship shown in Figures 6a and 6b, the concentration of phosphors can be adjusted to eliminate the bluish phenomenon in the edge area.

[0091] Figure 7a is a schematic diagram showing the edge color coordinate distribution of a display screen when a backlight structure without fluorescent reflective strips is applied to a spliced ​​screen. Figure 7b is a schematic diagram showing the edge color coordinate distribution of a display screen when a backlight structure with fluorescent reflective strips is applied to a spliced ​​screen. As shown in Figures 7a and 7b, without fluorescent reflective strips 103, the edge color coordinate curve of the display screen decreases, resulting in a bluish tint at the edge of the display screen. When fluorescent reflective strips 103 are used, the edge color coordinates of the display screen are stable, resulting in a uniform color at the edge of the display screen.

[0092] In the backlight structure provided by the embodiment of the present disclosure, a fluorescent reflection strip 103 is provided between the side of the bent portion 1012 of the back panel 101 close to the light-emitting device 1021 and the adjacent column light-emitting period 1021 in the edge area of ​​the light panel 102. The fluorescent reflection strip 103 can absorb a small portion of blue light and stimulate red light and green light to avoid the color of the edge of the display screen being blue, thereby making the color of the display screen uniform and improving the display effect.

[0093] In some embodiments, the light board 102 further has a central area (not shown in the figure); the driving current of the light emitting devices 1021 in the edge area is greater than the driving current of the light emitting devices 1021 in the central area.

[0094] In the actual optical architecture, the distance A between the light-emitting device 1021 at the edge of the light panel and the edge of the back panel 101 is greater than the distance B between adjacent light-emitting devices. The light energy reaching the edge area is weaker than the light energy in the center area. When the display screen is applied, there is a brightness attenuation area with a width of about 20 mm. The brightness attenuation is usually between the first Mini LED and the second Mini LED. The brightness attenuation area is the edge shadow area of ​​the display screen. In the embodiment of the present disclosure, the driving current of the light-emitting device 1021 in the edge area is greater than the driving current of the light-emitting device 1021 in the center area. This can increase the brightness of the light-emitting device 1021 in the edge area, so that the brightness of the light-emitting device 1021 in the edge area is consistent with the brightness of the light-emitting device 1021 in the center area, avoiding the appearance of a shadow area at the edge of the display screen, thereby improving the brightness uniformity of the display screen and improving the display effect. In some embodiments, the edge area is divided into multiple dimming zones; along the direction away from the bending portion, the driving current of the light-emitting device 1021 in the multiple dimming zones decreases step by step.

[0095] In the light board 102, the closer to the bend 1012 in the edge region B, the more severe the brightness decay of the light-emitting devices 1021 therein, and the lower the brightness. The edge region can be divided into multiple dimming zones; specifically, the multiple dimming zones can be a first dimming zone, a second dimming zone, and a third dimming zone. For example, the first dimming zone is provided with two columns of light-emitting devices 1021, the second dimming zone is provided with two columns of light-emitting devices 1021, and the third dimming zone is provided with one to six columns of light-emitting devices 1021. Along the direction away from the bending portion, the driving current of the light-emitting devices 1021 in multiple dimming zones decreases step by step. For example, the driving current duty cycle of the light-emitting device 1021 in the first dimming zone is 100%, the driving current duty cycle of the light-emitting device 1021 in the second dimming zone is 90%, and the driving current duty cycle of the light-emitting device 1021 in the third dimming zone is 80%. In this way, the brightness of the light-emitting devices 1021 in each dimming zone in the edge area can be further maintained consistent, avoiding the appearance of shadow areas at the edge of the display screen, thereby further improving the brightness uniformity of the display screen and improving the display effect.

[0096] In some embodiments, as shown in FIG5 , the backlight structure further includes: a plurality of black dots 104 ; the black dots 104 are located on the fluorescent reflector 103 between adjacent columns of light emitting devices 1021 near the bending portion in the edge region.

[0097] Figure 8a is a schematic diagram of the brightness curve of an actual optical structure. As shown in Figure 8a, the driving current is the same in all areas. The relative brightness of the light-emitting devices 1021 in the edge area (0-20 mm) is significantly attenuated, which easily leads to shadow areas at the edge of the display. Figure 8b is a schematic diagram of the brightness curve of the actual optical structure after adjusting the driving current of the light-emitting devices in the edge area. As shown in Figure 8b, by adjusting the driving current of the light-emitting devices 1021 in the edge area, the shadow areas at the edge of the display can be reduced. However, bright streaks, which are excessively bright, are easily observed in some areas (10-40 mm). Figure 8c is a schematic diagram of the brightness curve of the actual optical structure after adjusting the driving current of the light-emitting devices in the edge area and adding black dots. As shown in Figure 8c, black dots 104 are provided on the fluorescent reflector 103 between adjacent columns of light-emitting devices 1021 near the bend 1012 in the edge area. The black dots 104 absorb light, eliminating bright streaks, improving the brightness of the light-emitting devices 1021 in the 5th to 10th columns at the edge of the light panel 102, while ensuring uniform brightness along the edge area. It is understandable that the black dots 104 may also be located between adjacent rows of light-emitting devices 1021 close to the bending portion 1012 in the edge region.

[0098] In some embodiments, as shown in FIG5 , the backlight structure further includes: a driving board 105 ; the driving board 105 is located on the side of the main body 1011 away from the light board 102 , and is electrically connected to the light emitting device 1021 in the light board 102 through a via hole passing through the main body 1011 .

[0099] The driver board 105 provides driving current to the light-emitting devices 1021 in the light board 102, driving them to emit light. A via is provided on one end of the main body 1011, near the bend 1012. A flexible circuit board can pass through the via, with one end connected to the driver board 105 and the other end connected to the light-emitting devices 1021 in the light board 102. This reduces the space occupied by the driver board 105 on the main body 1011, allowing for the installation of a greater number of light-emitting devices 1021, thereby improving display brightness.

[0100] As shown in Figure 5, the backlight structure also includes: a frame 106; the frame 106 includes: a fixing portion 1061 and a supporting portion 1062 connected to the fixing portion 1061; the fixing portion 1061 is located on the side of the bending portion 1012 away from the light-emitting device 1021, and is fixedly connected to the bending portion 1012; the supporting portion 1062 is connected to the fixing portion 1061, and a first accommodating groove M1 is formed on the side of the fixing portion 1061 close to the light-emitting device 1021 to accommodate the bending portion 1012.

[0101] The frame 106 can be made of an extruded aluminum frame, wherein the fixing portion 1061 and the supporting portion 1062 can be an integrally formed structure. The fixing portion 1061 can be fixedly connected to the bending portion 1012 by means of screws or other components to achieve fixation between the frame 106 and the back panel 101. The supporting portion 1062 can be used to support structures such as the quantum dot conversion layer, and a first receiving groove M1 at a right angle can be formed between the supporting portion 1062 and the fixing portion 1061. The first receiving groove M1 can accommodate the bending portion 1012, so that the bending portion 1021 can be embedded in the first receiving groove M1 of the frame 106, thereby reducing the space occupied by the bending portion 1012 in the back panel 101 and reducing the border of the backlight structure.

[0102] In some embodiments, as shown in FIG. 5 , the support portion 1062 has a bottom surface 1062 a connected to the fixing portion 1061 , and a top surface 1062 b opposite to the bottom surface 1062 a ; the area of ​​the top surface 1062 b is smaller than that of the bottom surface 1062 a .

[0103] Because the light emitted by the light emitting device 1021 is scattered light, the area of ​​the top surface 1062b of the support portion 106 is smaller than the area of ​​the bottom surface 1062a. This prevents the support portion 106 from blocking the light and preventing shadows. Furthermore, the smaller area of ​​the top surface 1062b improves the precision and straightness of the frame 106.

[0104] In some embodiments, as shown in FIG5 , the support portion 1062 further includes a side surface 1062 c connecting the bottom surface 1062 a and the top surface 1062 b and close to the light emitting device 1021 ; the backlight structure further includes: a reflective sheet 107 ; the reflective sheet 107 is located on the side surface 1062 c of the support portion 1062 .

[0105] The reflective sheet 107 can reflect the light emitted by the light emitting device 1021 , thereby increasing the brightness of the edge and improving the light utilization rate of the light emitting device 1021 .

[0106] In some embodiments, as shown in FIG. 5 , the backlight structure further includes: a protective cover plate 108 ; the protective cover plate 108 and the main body portion 1011 and the bent portion 1012 of the back plate 101 form a protective cavity to accommodate the driving board 105 .

[0107] The shape of the protective cover 108 can be similar to that of the back panel 101, i.e., a curved shape. The protective cover 108, the main body 1011, and the curved portion 1012 of the back panel 101 form a protective cavity. The driver board 105 is located within the protective cavity, which can protect the driver board 105 from external stress that damages the driver board 105 and affects the display effect.

[0108] In some embodiments, as shown in FIG. 5 , the support portion 1062 and the fixing portion 1061 form a second receiving groove M2 on a side of the fixing portion 1061 away from the light emitting device 1021 to accommodate the protective cover 108 .

[0109] A second receiving groove M2 at a right angle can be formed between the supporting portion 1062 and the fixing portion 1061. The second receiving groove M2 can accommodate the protective cover 108, so that the protective cover 108 can be embedded in the second receiving groove M2 of the frame 106, reducing the space occupied by the protective cover 108 and reducing the border of the backlight structure.

[0110] In the second aspect, an embodiment of the present disclosure provides a backlight structure, as shown in FIG5 , the backlight structure includes: a back panel 101 , a light panel 102 , a fluorescent reflective strip 103 , a plurality of black dots 104 , a driving panel, a frame, a reflective sheet and a protective cover.

[0111] The back panel 101 includes: a main body 1011, and a bent portion 1012 connected to the main body 1011; the light board 102 is located on the main body 1011; the light board 102 includes: a plurality of light emitting devices 1021 arranged in an array; the light board 102 has an edge area close to the bent portion 1012; the fluorescent reflective strip 103 is located between the side 1012a of the bent portion 1012 close to the light emitting device 1021 and the adjacent columns of light emitting devices 1021 in the edge area of ​​the light board 102; the black dots 104 are located in the edge area close to the bent portion The fluorescent reflector 103 is located between adjacent columns of light-emitting devices 1021 in the bend; or the black dots 104 are located between adjacent rows of light-emitting devices 1021 in the edge area near the bend 1012; the driving board 105 is located on the side of the main body 1011 away from the light board 102, and is electrically connected to the light-emitting devices 1021 in the light board 102 through the through hole penetrating the main body 1011; the frame 106 includes: a fixing portion 1061 and a supporting portion 1062 connected to the fixing portion 1061; the fixing portion 1061 is located at the bend 1 012 is located on a side away from the light emitting device 1021 and is fixedly connected to the bent portion 1012; the support portion 1062 is connected to the fixed portion 1061, and a first receiving groove M1 is formed on the side of the fixed portion 1061 close to the light emitting device 1021 to accommodate the bent portion 1012; the support portion 1062 has a bottom surface 1062a connected to the fixed portion 1061, and a top surface 1062b arranged opposite to the bottom surface 1062a; the area of ​​the top surface 1062b is smaller than the area of ​​the bottom surface 1062a; the support portion 1062 also has a connection The bottom surface 1062a and the top surface 1062b are close to the side surface 1062c of the light-emitting device 1021; the backlight structure also includes: a reflective sheet 107; the reflective sheet 107 is located on the side surface 1062c of the support portion 1062; the protective cover 108 and the main body 1011 and the bent portion 1012 of the back panel 101 form a protective cavity to accommodate the driving board 105; the support portion 1062 and the fixing portion 1061 form a second accommodating groove M2 on the side of the fixing portion 1061 away from the light-emitting device 1021 to accommodate the protective cover 108.

[0112] The backlight structure provided in the embodiment of the present disclosure can refer to the implementation principle of the backlight structure provided in the first aspect above, and will not be described in detail here.

[0113] In a third aspect, embodiments of the present disclosure provide a display module. FIG9 is a schematic structural diagram of a display module provided by an embodiment of the present disclosure. As shown in FIG9 , the display module includes a backlight structure as provided in any of the aforementioned embodiments. The display module also includes a quantum dot diffuser plate 201. The quantum dot diffuser plate 201 is positioned on the support portion 1062 of the frame 106 and is aligned with the top surface 1062b of the support portion 1062.

[0114] Specifically, the quantum dot diffuser plate 201 includes: a base substrate 2011 , a color conversion film 2012 , and a brightness enhancement film 2013 , which are sequentially arranged along a direction away from the top surface 1062 b of the support portion 1062 .

[0115] The base substrate 2011 can be a glass substrate (1.1mm thick) coated with diffused ink on the top and bottom surfaces. The color conversion film 2012 and the brightness enhancement film 2013 are sequentially attached to the top surface of the base substrate 2011. The color conversion film 2012 can be a quantum dot material film or a phosphor film. The center wavelength of the quantum dot material layer is the same as that of the fluorescent reflective strip 103. The phosphor film and the fluorescent reflective strip 103 are made of the same material. The brightness enhancement film 2013 can be a BEF, DBEF, or a composite of both. The glass substrate and the film can be bonded using optically clear adhesive (OCA). The color conversion film 2012 can mix blue light. Through the scattering effect of the diffused ink on the top and bottom surfaces of the glass substrate and the reflective sheet on the light board 102, the Mini LED array light source is converted into a uniform blue light source. The quantum dot material film or phosphor film absorbs some blue light and then excites red or green light, converting the blue Mini LED light source into the desired white light. The prism-focusing effect of the brightness enhancement film 2013 can increase light brightness, or the reflective polarizer of the brightness enhancement film 2013 can increase light transmittance. Compared with traditional plastic diffusers, the glass substrate quantum dot diffuser 201 has high strength and a low thermal expansion coefficient, and can be directly bonded to the frame 106.

[0116] In some embodiments, as shown in FIG. 9 , the display module further includes: a liquid crystal display panel 202 : The liquid crystal display panel 202 is located on a side of the quantum dot diffusion plate 201 away from the light emitting device 1021 .

[0117] Specifically, the liquid crystal display panel 202 includes: an array substrate 2021, a color filter substrate 2022, a liquid crystal layer 2023, a first polarizer 2024, and a second polarizer 2025; the array substrate 2021 and the color filter substrate 2022 are arranged in a box; the liquid crystal layer 2023 is located between the array substrate 2021 and the color filter substrate 2022; the first polarizer 2024 is located on the side of the array substrate 2021 away from the color filter substrate 2022; the second polarizer 2025 is located on the side of the color filter substrate 2022 away from the array substrate 2021.

[0118] The array substrate 2021 provides a driving voltage by controlling the on / off switching of its thin-film transistors, driving the liquid crystal molecules in the liquid crystal layer 2023 to deflect and transmit light provided by the backlight structure. The color filter substrate 2022 filters white light to form monochromatic light of corresponding colors, achieving color display. The first polarizer 2024 and the second polarizer 2025 convert the circularly polarized light emitted by the light-emitting device 1021 into linearly polarized light to transmit the liquid crystal molecules in the liquid crystal layer 2023.

[0119] In a fourth aspect, an embodiment of the present disclosure provides a display module, as shown in FIG9 , the display module includes a backlight structure as provided in any of the above embodiments; the display module also includes: a quantum dot diffusion plate 201; the quantum dot diffusion plate 201 is located on the support portion 1062 of the frame 106 and is in contact with the top surface 1062b of the support portion 1062; the liquid crystal display panel 202 is located on the side of the quantum dot diffusion plate 201 away from the light-emitting device 1021; the quantum dot diffusion plate 201 includes: a substrate 2011 arranged in sequence along a direction away from the top surface 1062b of the support portion 1062 , color conversion film 2012 and brightness enhancement film 2013; the liquid crystal display panel 202 includes: an array substrate 2021, a color filter substrate 2022, a liquid crystal layer 2023, a first polarizer 2024, and a second polarizer 2025; the array substrate 2021 and the color filter substrate 2022 are arranged in a box; the liquid crystal layer 2023 is located between the array substrate 2021 and the color filter substrate 2022; the first polarizer 2024 is located on the side of the array substrate 2021 away from the color filter substrate 2022; the second polarizer 2025 is located on the side of the color filter substrate 2022 away from the array substrate 2021.

[0120] The display module provided in the embodiment of the present disclosure may refer to the implementation principle of the display module provided in the third aspect above, which will not be described in detail here.

[0121] In a fifth aspect, an embodiment of the present disclosure provides a spliced ​​screen, which includes a display module as provided in any of the above embodiments. Its implementation principle is similar to that of the above-mentioned backlight structure and display module, and will not be repeated here.

[0122] In a sixth aspect, an embodiment of the present disclosure provides a display device, which includes a spliced ​​screen as provided in any of the above embodiments. Its implementation principle is similar to that of the above-mentioned backlight structure, display module, and spliced ​​screen, and will not be repeated here.

[0123] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present disclosure, and such modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A backlight structure, wherein: The backlight structure includes: a back plate, a light plate and a fluorescent reflective strip; The back plate includes: a main body portion, and a bending portion connected to the main body portion; The light board is located on the main body; the light board comprises: a plurality of light emitting devices arranged in an array; the light board has an edge area close to the bending portion; The fluorescent reflection strip is located at a side of the bending portion close to the light emitting device and between adjacent columns of the light emitting devices in the edge area of ​​the light board.

2. The backlight structure according to claim 1, wherein: The light panel also has a central area; The driving current of the light emitting device in the edge area is greater than the driving current of the light emitting device in the central area.

3. The backlight structure according to claim 2, wherein: The edge area is divided into a plurality of dimming areas; Along the direction away from the bending portion, the driving current of the light emitting devices in the plurality of dimming zones decreases step by step.

4. The backlight structure according to claim 3, wherein: The backlight structure further includes: a plurality of black dots; The black dots are located on the fluorescent reflector between adjacent columns of the light emitting devices in the edge region; or, the black dots are located between adjacent rows of the light emitting devices in the edge region close to the bending portion.

5. The backlight structure according to claim 1, wherein: The backlight structure further includes: a driving board; the driving board is located on a side of the main body away from the light board, and is electrically connected to the light-emitting device in the light board through a via hole penetrating the main body.

6. The backlight structure according to claim 5, wherein: The backlight structure further comprises: a frame; the frame comprises: a fixing portion and a supporting portion connected to the fixing portion; The fixing portion is located on a side of the bending portion away from the light emitting device and is adjacent to the bending portion. Fixed connection; The supporting portion is connected to the fixing portion, and a first accommodating groove is formed on a side of the fixing portion close to the light emitting device to accommodate the bending portion; The supporting portion comprises a bottom surface connected to the fixing portion, and a top surface arranged opposite to the bottom surface; The area of ​​the top surface is smaller than the area of ​​the bottom surface.

7. The backlight structure according to claim 6, wherein: The support portion further comprises a side surface connecting the bottom surface and the top surface and close to the light emitting device; The backlight structure further includes: a reflective sheet; The reflective sheet is located on the side surface of the supporting portion.

8. The backlight structure according to claim 6, wherein: The backlight structure further includes: a protective cover plate; the protective cover plate and the main body and the bent portion of the back plate form a protective cavity to accommodate the driving board; The supporting portion and the fixing portion form a second accommodating groove on a side of the fixing portion away from the light emitting device to accommodate the protective cover.

9. A backlight structure, wherein: The backlight structure includes: a back plate, a light plate, a fluorescent reflective strip, a plurality of black dots, a driving plate, a frame, a reflective sheet and a protective cover plate; The back plate includes: a main body portion, and a bending portion connected to the main body portion; The light board is located on the main body; the light board comprises: a plurality of light emitting devices arranged in an array; the light board has an edge area close to the bending portion; The fluorescent reflective strip is located between the side of the bent portion close to the light emitting device and the adjacent columns of the light emitting devices in the edge area of ​​the light board; The black dots are located on the fluorescent reflector between adjacent columns of the light emitting devices in the edge region; or, the black dots are located between adjacent rows of the light emitting devices in the edge region close to the bending portion; The driving board is located on the side of the main body away from the lamp board, and passes through the main body. The via hole in the part is electrically connected to the light emitting device in the light board; The frame includes: a fixing portion and a supporting portion connected to the fixing portion; The fixing portion is located at a side of the bending portion away from the light emitting device and is fixedly connected to the bending portion; The supporting portion is connected to the fixing portion, and a first accommodating groove is formed on a side of the fixing portion close to the light emitting device to accommodate the bending portion; The supporting portion comprises a bottom surface connected to the fixing portion, and a top surface arranged opposite to the bottom surface; The area of ​​the top surface is smaller than the area of ​​the bottom surface; The support portion further comprises a side surface connecting the bottom surface and the top surface and close to the light emitting device; The reflective sheet is located on the side surface of the supporting portion; The protective cover plate, the main body portion and the bent portion of the back plate form a protective cavity to accommodate the driving plate; The supporting portion and the fixing portion form a second accommodating groove on a side of the fixing portion away from the light emitting device to accommodate the protective cover.

10. A display module, wherein: The display module comprises the backlight structure according to any one of claims 1 to 9.

11. The display module according to claim 10, wherein: The display module further includes: a quantum dot diffusion plate; The quantum dot diffusion plate is located on the support portion of the frame and is in contact with the top surface of the support portion; The quantum dot diffusion plate includes: a base substrate, a color conversion film and a brightness enhancement film which are sequentially arranged along the top surface direction away from the support portion.

12. The display module according to claim 11, wherein: The color conversion film is a quantum dot material layer or a phosphor film; The central wavelength of the quantum dot material layer is the same as the central wavelength of the fluorescent reflective strip; The phosphor film is made of the same material as the fluorescent reflective strip.

13. The display module according to claim 11, wherein: The display module further includes: a liquid crystal display panel; the liquid crystal display panel is located on a side of the quantum dot diffusion plate away from the light emitting device; The liquid crystal display panel comprises: an array substrate, a color filter substrate, a liquid crystal layer, a first polarizer, and a second polarizer; The array substrate and the color filter substrate are arranged in a box; The liquid crystal layer is located between the array substrate and the color filter substrate; The first polarized light is biased at a side of the array substrate away from the color filter substrate; The second polarizer is located on a side of the color filter substrate away from the array substrate.

14. A display module, wherein: The display module comprises the backlight structure according to any one of claims 1 to 12; The display module also includes: a quantum dot diffusion plate and a liquid crystal display panel; The quantum dot diffusion plate is located on the support portion of the frame and is in contact with the top surface of the support portion; The liquid crystal display panel is located on a side of the quantum dot diffusion plate away from the light emitting device; The quantum dot diffusion plate comprises: a base substrate, a color conversion film and a brightness enhancement film which are sequentially arranged along the top surface direction away from the support portion; The liquid crystal display panel comprises: an array substrate, a color filter substrate, a liquid crystal layer, a first polarizer, and a second polarizer; The array substrate and the color filter substrate are arranged in a box; The liquid crystal layer is located between the array substrate and the color filter substrate; The first polarized light is biased at a side of the array substrate away from the color filter substrate; The second polarizer is located on a side of the color filter substrate away from the array substrate.

15. A spliced ​​screen, wherein: The spliced ​​screen includes a plurality of display modules as described in any one of claims 10 to 14.

16. A display device, wherein: The display device comprises the spliced ​​screen as claimed in claim 15.

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