Vehicle backlight module and display device to prevent the Mini LED lights from displaying a bluish tint around their edges.

Abstract

The utility model provides a kind of vehicle-mounted backlight module for preventing Mini LED lamp four around display blue, including lower frame, lamp plate, diffusion plate, optical film and first fluorescent film layer, the lamp plate is arranged in the lower frame, the diffusion plate is arranged on the lamp plate, the optical film is arranged on the diffusion plate, the first fluorescent film layer is circumferentially arranged around the side of the diffusion plate.The vehicle-mounted backlight module for preventing Mini LED lamp four around display blue of the utility model can solve the problem of visible blue edge in the display area of the prior art, optimize the visual effect of the product, and improve the stability of the product. The utility model also relates to a display device.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a vehicle backlight module and display device for preventing the display around a Mini LED light from turning blue. Background Technology

[0002] Cars have become an indispensable means of transportation in people's lives, especially with the widespread application of new energy vehicles. In addition to in-vehicle driving safety and experience, customers are also demanding higher standards for interior displays, with consumers seeking larger screens and more vibrant, wider color gamut in-vehicle display effects. Many car manufacturers have begun to incorporate MINI into their products. LED automotive backlights enhance color gamut, while COB structures offer an ultra-high color gamut experience. A QD film (quantum dot film) is placed on the COB structure's lamp board, allowing blue light emitted from the chip within the board to be converted into white light for an ultra-high color gamut. However, because the QD film needs to accommodate expansion during RA (Radar Acoustics) testing, there will be an uncovered edge between the QD film and the die-cast component, preventing the conversion of blue light into white light. This results in a visible blue edge around the backlight when it's on. Furthermore, after rigorous reliability testing (1000 hours of high temperature and humidity, 500 cycles of thermal shock, and 1000 hours of high-temperature illumination), the QD film is prone to shrinkage. This shrinkage exacerbates the risk of a blue edge around the display area, affecting the display quality. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a vehicle backlight module that prevents the display of Mini LED lights from turning blue around the edges. This vehicle backlight module can solve the problem of visible blue edges around the display area in the prior art, optimize the visual effect of the product, and improve the stability of the product.

[0004] This utility model provides a vehicle backlight module to prevent the Mini LED light from displaying a bluish tint around its perimeter. It includes a lower frame, a lamp plate, a diffuser plate, an optical film, and a first fluorescent film layer. The lamp plate is disposed within the lower frame, the diffuser plate is disposed on the lamp plate, the optical film is disposed on the diffuser plate, and the first fluorescent film layer is disposed circumferentially around the side of the diffuser plate.

[0005] In one embodiment, the vehicle-mounted backlight module includes a second fluorescent film layer, the lower frame is provided with a support platform, the diffuser plate is disposed on the support platform, and the second fluorescent film layer is fixedly connected between the diffuser plate and the support platform.

[0006] In one embodiment, the first fluorescent film layer includes a first fluorescent segment, a second fluorescent segment, a third fluorescent segment, and a fourth fluorescent segment. The diffuser plate includes a first side and a second side disposed opposite to each other, as well as a third side and a fourth side disposed opposite to each other. The first side and the second side are fixedly connected between the third side and the fourth side. The first fluorescent segment is fixedly connected to the first side, the second fluorescent segment is fixedly connected to the second side, the third fluorescent segment is fixedly connected to the third side, and the fourth fluorescent segment is fixedly connected to the fourth side.

[0007] In one embodiment, the first fluorescent segment and the third fluorescent segment are an integral structure, and the second fluorescent segment and the fourth fluorescent segment are an integral structure; or the first fluorescent segment, the third fluorescent segment, and the second fluorescent segment are an integral structure; or the first fluorescent segment, the second fluorescent segment, the third fluorescent segment, and the fourth fluorescent segment are an integral structure.

[0008] In one embodiment, the vehicle-mounted backlight module includes a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is fixedly connected to the diffuser plate and the second fluorescent film layer, and the second adhesive layer is fixedly connected to the second fluorescent film layer and the support platform.

[0009] In one embodiment, the width of the second fluorescent film layer is equal to the width of the support stage.

[0010] In one embodiment, the second fluorescent film layer includes a first fluorescent portion, a second fluorescent portion, a third fluorescent portion, and a fourth fluorescent portion. The support stage includes a first support portion, a second support portion, and a third support portion and a fourth support portion arranged opposite to each other. The first support portion and the third support portion are fixedly connected to the second support portion and the fourth support portion. The first fluorescent portion is disposed on the first support portion, the second fluorescent portion is disposed on the second support portion, the third fluorescent portion is disposed on the third support portion, and the fourth fluorescent portion is disposed on the fourth support portion.

[0011] In one embodiment, the first fluorescent part and the third fluorescent part are integrally formed, and the second fluorescent part and the fourth fluorescent part are integrally formed; or the first fluorescent part, the third fluorescent part and the second fluorescent part are integrally formed.

[0012] In one embodiment, the optical film includes a quantum dot film, a lower brightness enhancement film, an upper brightness enhancement film, and a brightness enhancement film. The quantum dot film is disposed on the diffuser plate, the lower brightness enhancement film is disposed on the quantum dot film, the upper brightness enhancement film is disposed on the lower brightness enhancement film, and the brightness enhancement film is disposed on the upper brightness enhancement film.

[0013] This utility model also relates to a display device, including the aforementioned vehicle backlight module for preventing the Mini LED lights from displaying a bluish tint around their perimeter.

[0014] This utility model's vehicle-mounted backlight module, by attaching a first fluorescent film layer to the side of the diffuser plate, can convert the blue light at the edge of the lamp panel into white light to obtain an ultra-high color gamut, avoid the phenomenon of blue edges appearing around the display area, optimize the visual effect of blue edges around the vehicle-mounted backlight module, optimize the display after normal lighting and reliability tests, improve product stability, and meet consumers' pursuit of more vivid and realistic screen images. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a top view of the lower frame of this utility model.

[0017] Figure 2 This is a top view of the structure of the lower frame of this utility model after the light panel and the second fluorescent film layer are installed.

[0018] Figure 3 This is a partial cross-sectional view of the vehicle-mounted backlight module of this utility model.

[0019] Figure 4 yes Figure 2 A schematic diagram of the cross-sectional structure at point AA.

[0020] Figure 5 yes Figure 2 Schematic diagram of the cross-sectional structure at point BB.

[0021] Reference numerals: Bottom frame - 11; Base plate - 111; Side frame - 112; First side wall - 1121; Third side wall 1123-1123; Fourth side wall 1124-1124; Support platform - 113; First support part - 1131; Second support part - 1132; Third support part - 1133; Fourth support part - 1134; Lamp panel - 12; Diffuser plate - 13; First side - 131; Second side - 132; Third side - 1 33; Fourth side - 134; Optical film - 14; Quantum dot film - 141; Lower brightness enhancement film - 142; Upper brightness enhancement film - 143; Brightness enhancement film - 144; First fluorescent film layer - 15; First fluorescent segment - 151; Second fluorescent segment - 152; Third fluorescent segment - 153; Fourth fluorescent segment - 154; Second fluorescent film layer - 16; First fluorescent part - 161; Second fluorescent part - 162; Third fluorescent part - 163; Fourth fluorescent part - 164. Detailed Implementation

[0022] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0024] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0026] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0027] like Figures 1 to 5 As shown, the vehicle backlight module for preventing the Mini LED lights from displaying a bluish tint includes a lower frame 11, a lamp plate 12, a diffuser plate 13, an optical film 14, and a first fluorescent film layer 15. The lamp plate 12 is disposed inside the lower frame 11, the diffuser plate 13 is disposed on the lamp plate 12, the optical film 14 is disposed on the diffuser plate 13, and the first fluorescent film layer 15 is disposed circumferentially around the side of the diffuser plate 13. In this embodiment, the first fluorescent film layer 15 completely covers the side of the diffuser plate 13, and the width of the first fluorescent film layer 15 is equal to the width of the side of the diffuser plate 13. The lamp board 12 is a COB light source, which is a high-efficiency integrated surface light source with mini LED chips directly attached to a high-reflectivity mirror metal substrate. The lower frame 11 is a die-cast part, which includes a base plate 111 and a side frame 112 fixedly connected to the base plate 111. It can be understood that the base plate 111 and the side frame 112 are integrally formed. The lamp board 12 is fixedly connected to the base plate 111 by thermally conductive adhesive, and the first fluorescent film layer 15 is fixedly connected to the side of the diffuser plate 13 by double-sided adhesive. When blue light is emitted from the edge of the lamp board 12, the first fluorescent film layer 15 can convert the blue light into white light to avoid the risk of blue edges around the display area. The principle of converting blue light into white light in the first fluorescent film layer 15 typically involves two processes: emission and excitation. During the emission process, the lamp panel 12 emits blue light with a wavelength of 450nm±50nm. This blue light can be absorbed by the fluorescent film layer and converted into visible white light. However, this process does not directly produce the white light that we can see with our naked eyes. It is actually achieved by exciting the yellow phosphor in the first fluorescent film layer 15. When blue light shines on the phosphor, it excites the yellow fluorescence, thereby producing the white light that we can see with our naked eyes.

[0028] The vehicle backlight module of this utility model can convert the blue light at the edge of the lamp board 12 into white light by attaching a first fluorescent film layer 15 to the side of the diffuser plate 13 to obtain an ultra-high color gamut, avoid the phenomenon of blue edges appearing around the display area, optimize the visual effect of blue edges around the vehicle backlight module, optimize the display of the screen after normal lighting and reliability tests, improve the stability of the product, and meet consumers' pursuit of more vivid and realistic screen images.

[0029] like Figures 3 to 5As shown, the first fluorescent film layer 15 includes a first fluorescent segment 151, a second fluorescent segment 152, a third fluorescent segment 153, and a fourth fluorescent segment 154. The diffuser plate 13 includes a first side 131 and a second side 132 disposed opposite to each other, and a third side 133 and a fourth side 134 disposed opposite to each other. The first side 131 and the second side 132 are fixedly connected between the third side 133 and the fourth side 134. The first fluorescent segment 151 is fixedly connected to the first side 131, the second fluorescent segment 152 is fixedly connected to the second side 132, the third fluorescent segment 153 is fixedly connected to the third side 133, and the fourth fluorescent segment 154 is fixedly connected to the fourth side 134. In this embodiment, the first fluorescent segment 151, the second fluorescent segment 152, the third fluorescent segment 153, and the fourth fluorescent segment 154 are all separate structures. The side frame 112 includes a first sidewall 1121, a second sidewall, and a third sidewall 1123 and a fourth sidewall 1124 arranged opposite to each other. The first sidewall 1121 and the second sidewall are fixedly connected between the third sidewall 1123 and the fourth sidewall 1124, respectively. The first fluorescent segment 151 abuts or contacts the first sidewall 1121, the second fluorescent segment 152 forms a first expansion gap with the second sidewall, the third fluorescent segment 153 forms a second expansion gap with the third sidewall 1123, and the fourth fluorescent segment 154 forms a third expansion gap with the fourth sidewall 1124. The first expansion gap, the second expansion gap, and the third expansion gap are used to reserve expansion space for the diffuser plate 13 and the optical film 14 when the vehicle backlight module is subjected to reliability tests.

[0030] In another preferred embodiment, the first fluorescent segment 151 and the third fluorescent segment 153 are an integral structure, and the second fluorescent segment 152 and the fourth fluorescent segment 154 are an integral structure.

[0031] In another preferred embodiment, the first fluorescent segment 151, the third fluorescent segment 153, and the second fluorescent segment 152 are an integral structure.

[0032] In another preferred embodiment, the first fluorescent segment 151, the second fluorescent segment 152, the third fluorescent segment 153, and the fourth fluorescent segment 154 are an integral structure.

[0033] Preferably, the vehicle-mounted backlight module includes a second fluorescent film layer 16, a support platform 113 on the lower frame 11, a diffuser plate 13 disposed on the support platform 113, and the second fluorescent film layer 16 fixedly connected between the diffuser plate 13 and the support platform 113. Specifically, the support platform 113 is fixedly connected to the inner wall of the side frame 112, and the support platform 113 is circumferentially arranged around the inner wall of the side frame 112. The support platform 113 and the side frame 112 are integrally formed, and the support platform 113 is used to support the diffuser plate 13. It can be understood that the principle of the second fluorescent film layer 16 converting blue light into white light is the same as that of the first fluorescent film layer 15, and will not be elaborated further here.

[0034] Preferably, the vehicle-mounted backlight module includes a first adhesive layer (not shown) and a second adhesive layer (not shown). The first adhesive layer is fixedly connected to the diffuser plate 13 and the second fluorescent film layer 16, and the second adhesive layer is fixedly connected to the second fluorescent film layer 16 and the support platform 113. The first adhesive layer and the second adhesive layer are preferably double-sided adhesive.

[0035] Preferably, the width of the second fluorescent film layer 16 is equal to the width of the support platform 113. After the vehicle backlight module undergoes a reliability test, even if the optical film 14 shrinks, the blue light at the edge of the lamp panel 12 can still be converted into white light through the second fluorescent film layer 16, further avoiding the risk of blue edges appearing around the display area.

[0036] like Figure 2 , Figure 4 and Figure 5 As shown, the second fluorescent film layer 16 includes a first fluorescent part 161, a second fluorescent part 162, a third fluorescent part 163, and a fourth fluorescent part 164. The support stage 113 includes a first support part 1131, a second support part 1132, a third support part 1133, and a fourth support part 1134 arranged opposite to each other. The first support part 1131 and the third support part 1133 are fixedly connected to the second support part 1132 and the fourth support part 1134. It can be understood that the first support part 1131, the second support part 1132, the third support part 1133, and the fourth support part 1134 are integrally formed. The first fluorescent part 161 is disposed on the first support part 1131, the second fluorescent part 162 is disposed on the second support part 1132, the third fluorescent part 163 is disposed on the third support part 1133, and the fourth fluorescent part 164 is disposed on the fourth support part 1134. The first fluorescent part 161, the third fluorescent part 163, and the second fluorescent part 162 are integrally formed.

[0037] Preferably, the first fluorescent part 161 and the third fluorescent part 163 are integral structures, and the second fluorescent part 162 and the fourth fluorescent part 164 are integral structures.

[0038] In another preferred embodiment, the first fluorescent part 161, the second fluorescent part 162, the third fluorescent part 163 and the third fluorescent part 163 are separate structures.

[0039] like Figure 4As shown, the optical film 14 includes a quantum dot film 141, a lower brightness enhancement film 142, an upper brightness enhancement film 143, and a brightness enhancement film 144. The quantum dot film 141 is disposed on the diffuser plate 13, the lower brightness enhancement film 142 is disposed on the quantum dot film 141, the upper brightness enhancement film 143 is disposed on the lower brightness enhancement film 142, and the brightness enhancement film 144 is disposed on the upper brightness enhancement film 143. In this embodiment, the quantum dot film 141 is a QD film, and the brightness enhancement film 144 is a DBEF film. The quantum dot film 141 is fixedly connected to the diffuser plate 13 by double-sided adhesive, the lower brightness enhancement film 142 is fixedly connected to the quantum dot film 141 by double-sided adhesive, the upper brightness enhancement film 143 is fixedly connected to the lower brightness enhancement film 142 by double-sided adhesive, and the brightness enhancement film 144 is fixedly connected to the upper brightness enhancement film 143 by double-sided adhesive.

[0040] This utility model also relates to a display device, including the aforementioned vehicle backlight module for preventing the Mini LED lights from emitting a bluish tint around their perimeter. The display device in this embodiment may be, for example, a high-end vehicle instrument cluster, a vehicle central control display, a vehicle dashcam, a vehicle DVD navigation system, a vehicle dashboard integrated display, or a vehicle streaming media rearview mirror, but is not limited thereto.

[0041] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A vehicle backlight module for preventing bluish tint around Mini LED lights, characterized in that, It includes a lower frame (11), a lamp plate (12), a diffuser plate (13), an optical film (14), and a first fluorescent film layer (15). The lamp plate (12) is disposed inside the lower frame (11), the diffuser plate (13) is disposed on the lamp plate (12), the optical film (14) is disposed on the diffuser plate (13), and the first fluorescent film layer (15) is disposed circumferentially around the side of the diffuser plate (13).

2. The vehicle backlight module for preventing bluish tinge around Mini LED lights as described in claim 1, characterized in that, The vehicle-mounted backlight module includes a second fluorescent film layer (16), the lower frame (11) is provided with a support platform (113), the diffuser plate (13) is disposed on the support platform (113), and the second fluorescent film layer (16) is fixedly connected between the diffuser plate (13) and the support platform (113).

3. The vehicle backlight module for preventing bluish tint around Mini LED lights as described in claim 2, characterized in that, The first fluorescent film layer (15) includes a first fluorescent segment (151), a second fluorescent segment (152), a third fluorescent segment (153), and a fourth fluorescent segment (154). The diffuser plate (13) includes a first side (131) (1121) and a second side (132) arranged opposite to each other, as well as a third side (133) (1123) and a fourth side (134) (1124) arranged opposite to each other. The first side (131) (1121) and the second side (132) are fixedly connected between the third side (133) (1123) and the fourth side (134) (1124). The first fluorescent segment (151) is fixedly connected to the first side (131) (1121), the second fluorescent segment (152) is fixedly connected to the second side (132), the third fluorescent segment (153) is fixedly connected to the third side (133) (1123), and the fourth fluorescent segment (154) is fixedly connected to the fourth side (134) (1124).

4. The vehicle backlight module for preventing bluish tint around Mini LED lights as described in claim 3, characterized in that, The first fluorescent segment (151) and the third fluorescent segment (153) are an integral structure, and the second fluorescent segment (152) and the fourth fluorescent segment (154) are an integral structure; Alternatively, the first fluorescent segment (151), the third fluorescent segment (153), and the second fluorescent segment (152) may be an integral structure; Alternatively, the first fluorescent segment (151), the second fluorescent segment (152), the third fluorescent segment (153), and the fourth fluorescent segment (154) may be an integral structure.

5. The vehicle backlight module for preventing bluish tint around Mini LED lights as described in claim 2, characterized in that, The vehicle-mounted backlight module includes a first adhesive layer and a second adhesive layer. The first adhesive layer is fixedly connected to the diffuser plate (13) and the second fluorescent film layer (16), and the second adhesive layer is fixedly connected to the second fluorescent film layer (16) and the support platform (113).

6. The vehicle backlight module for preventing bluish tinge around Mini LED lights as described in claim 2, characterized in that, The width of the second fluorescent film layer (16) is equal to the width of the support stage (113).

7. The vehicle backlight module for preventing bluish tinge around Mini LED lights as described in claim 5, characterized in that, The second fluorescent film layer (16) includes a first fluorescent part (161), a second fluorescent part (162), a third fluorescent part (163), and a fourth fluorescent part (164). The support stage (113) includes a first support part (1131), a second support part (1132), a third support part (1133), and a fourth support part (1134) arranged opposite to each other. The first support part (1131) and the third support part (1133) are fixedly connected to the second support part (1132) and the fourth support part (1134). The first fluorescent part (161) is disposed on the first support part (1131), the second fluorescent part (162) is disposed on the second support part (1132), the third fluorescent part (163) is disposed on the third support part (1133), and the fourth fluorescent part (164) is disposed on the fourth support part (1134).

8. The vehicle backlight module for preventing bluish tint around Mini LED lights as described in claim 7, characterized in that, The first fluorescent part (161) and the third fluorescent part (163) are integral structures, and the second fluorescent part (162) and the fourth fluorescent part (164) are integral structures; Alternatively, the first fluorescent part (161), the third fluorescent part (163), and the second fluorescent part (162) may be an integral structure.

9. The vehicle backlight module for preventing bluish tint around Mini LED lights as described in claim 1, characterized in that, The optical film (14) includes a quantum dot film (141), a lower brightness enhancement film (142), an upper brightness enhancement film (143), and a brightness enhancement film (144). The quantum dot film (141) is disposed on the diffuser plate (13), the lower brightness enhancement film (142) is disposed on the quantum dot film (141), the upper brightness enhancement film (143) is disposed on the lower brightness enhancement film (142), and the brightness enhancement film (144) is disposed on the upper brightness enhancement film (143).

10. A display device, characterized in that, Including the vehicle backlight module for preventing the Mini LED lights from displaying a bluish tint around their perimeter, as described in any one of claims 1 to 9.

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