Backlight module, vehicle-mounted display screen and vehicle

Abstract

The utility model relates to a backlight module, a vehicle-mounted display screen and a vehicle. The backlight module comprises a back plate and an optical film. Wherein the back plate forms or is connected with a containing groove used for containing the optical film; the positioning structure is used for positioning the optical film; the optical film is provided with a film structure which is provided with a film through hole, and at least part of the positioning structure is arranged in the film through hole in a penetrating mode. The backlight module, the vehicle-mounted display screen and the vehicle have the beneficial effects that the optical film is positioned through the positioning structure of the back plate so as to improve the strength of the positioning structure.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a backlight module, a vehicle-mounted display screen and a vehicle. Background Art

[0002] With the continuous development of the automotive industry, especially the continuous penetration of new energy vehicles, smart cockpits have gradually become a trend. The in-vehicle display screen includes the instrument screen, central control screen, co-pilot entertainment screen, and rear entertainment screen. As an important part of the smart cockpit, it undertakes the main functions of human-vehicle interaction, information display, and navigation entertainment. In order to enhance the consumer experience, integrate function selection into the display screen control, and increase the sense of technology in the smart cockpit, the in-vehicle display screen is gradually developing towards a large screen. As the size of the display screen becomes larger and larger, and the car manufacturers' requirements for the reliability and display effect of the display screen increase, this brings greater challenges to the structural design of the display screen.

[0003] The backlight module stacking structure of the display screen includes some optical films. In order to assemble the optical films in the correct position in the backlight module and prevent displacement after assembly, in the prior art, these optical films are positioned on the positioning structure of the light guide plate. However, since the light guide plate is generally made of PC plastic and has low strength, when the size of the display screen is larger, the size and weight of the optical film will also increase. Under some extreme conditions, such as high and low temperature, high humidity, and vibration environments in the three comprehensive vibration tests, the positioning structure of the light guide plate is prone to excessive force and breakage. Utility Model Content

[0004] The embodiment of the present application provides a backlight module, which improves the strength of the positioning structure for the optical film and is not prone to breakage and failure, so as to at least partially solve the above-mentioned technical problems.

[0005] In order to achieve the above object, according to a first aspect of the present application, a backlight module is provided, comprising:

[0006] Backplane and optical film;

[0007] Wherein, the back plate is formed or connected with:

[0008] A receiving groove, used for receiving the optical film;

[0009] A positioning structure, used for positioning the optical film;

[0010] The optical film is formed with:

[0011] The diaphragm structure is provided with a diaphragm through hole, and at least part of the positioning structure is passed through the diaphragm through hole. Optionally, the optical diaphragm further includes:

[0012] The main body part at least covers the light-emitting area of the backlight module and is located in the receiving groove;

[0013] Wherein, the diaphragm structure is connected to the periphery of the main body part, and the positioning structure is close to the receiving groove.

[0014] Optionally, the back plate is provided with a plurality of positioning structures in a first direction, and the optical diaphragm is provided with a plurality of diaphragm structures in the first direction.

[0015] Optionally, the plurality of diaphragm structures are arranged on the same side edge of the optical diaphragm.

[0016] Optionally, a part of the positioning structures are configured to have a first positioning block, and another part of the positioning structures are configured to have a second positioning block;

[0017] A part of the diaphragm structures are configured to have a first diaphragm through hole, and another part of the diaphragm structures are configured to have a second diaphragm through hole;

[0018] In the first direction, a first difference between the width of the first diaphragm through hole and the width of the first positioning block is greater than a second difference between the width of the second diaphragm through hole and the width of the second positioning block.

[0019] Optionally, in the first direction, the second diaphragm through hole is arranged at the middle position of the optical diaphragm.

[0020] Optionally, the positioning structure further has:

[0021] A positioning groove formed in the peripheral area of the receiving groove for at least partial embedding of the optical diaphragm;

[0022] Wherein, the first positioning block and the second positioning block are respectively formed in the positioning groove;

[0023] The diaphragm structure further has:

[0024] A diaphragm convex edge formed in the peripheral area of the optical diaphragm and protruding from the edge of the optical diaphragm;

[0025] Wherein, the first diaphragm through hole and the second diaphragm through hole are respectively formed at the diaphragm convex edge, and the diaphragm convex edge is embedded in the positioning groove.

[0026] Optionally, the positioning groove communicates with the receiving groove.

[0027] Optionally, the back plate has:

[0028] A support part arranged in the peripheral area of the receiving groove;

[0029] The optical diaphragm has:

[0030] A fixing portion, arranged at an edge of the diaphragm structure;

[0031] Wherein, the fixing portion is combined with the supporting portion to fix the optical film to the back plate.

[0032] Optionally, the backlight module further includes:

[0033] The colloid is arranged between the supporting part and the fixing part so as to make the supporting part and the fixing part bonded and fixed.

[0034] Optionally, the optical films are stacked in plurality, the support portion is provided with a plurality of support surfaces, and the colloid is attached to the support surfaces;

[0035] In a second direction parallel to the stacking direction of the optical film, the plurality of support surfaces are located at different positions;

[0036] At least parts of projections of the fixing portions of two adjacent optical films in the second direction are staggered.

[0037] Optionally, the plurality of supporting surfaces of the supporting portion form a step structure.

[0038] Optionally, in the first direction, the support portion is arranged in a middle area of ​​the back plate.

[0039] Optionally, the backlight module further includes:

[0040] A light guide plate, arranged in the receiving groove of the back plate;

[0041] Wherein, the light guide plate is arranged between the bottom surface of the accommodating groove and the optical film.

[0042] According to a second aspect of the present application, a vehicle-mounted display screen is provided, comprising the backlight module as described above.

[0043] According to a third aspect of the present application, a vehicle is also provided, comprising the vehicle-mounted display screen as described above.

[0044] The beneficial effects of the present application are: providing a backlight module, a vehicle display screen and a vehicle that can position an optical film through a positioning structure of a back plate to improve the strength of the positioning structure.

[0045] More specifically, some embodiments of the present application may produce the following specific beneficial effects:

[0046] Positioning is achieved by setting a positioning structure on the back plate and cooperating with the film structure on the optical film; since the strength of the back plate is relatively high, the strength of the positioning structure can be increased to ensure that the positioning structure is not prone to breakage and failure under extreme conditions.

[0047] Other features and advantages of the present application will be described in detail in the following specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative efforts.

[0049] In order to more fully understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, where the same reference numerals in the following description represent the same parts.

[0050] Figure 1 is a schematic diagram of the overall structure of the backlight module provided in the exemplary embodiment of the present disclosure;

[0051] Figure 2 is Figure 1 an enlarged schematic view of part C in

[0052] Figure 3 is Figure 1 an enlarged schematic view of part D in

[0053] Figure 4 is Figure 1 a cross-sectional view taken along A-A in

[0054] Figure 5 is Figure 1 a cross-sectional view taken along B-B in

[0055] Figure 6 is Figure 5 an enlarged schematic view of part E in

[0056] Figure 7 is Figure 5 an enlarged schematic view of part F in

[0057] Figure 8 is an exploded view of the backlight module provided in the exemplary embodiment of the present disclosure;

[0058] Figure 9 is Figure 8 an enlarged schematic view of part G in

[0059] Figure 10 is Figure 8 an enlarged schematic view of part H in

[0060] Figure 11 is a schematic diagram of the overall structure of the vehicle provided in the exemplary embodiment of the present disclosure;

[0061] Description of the reference numerals:

[0062] 100, backlight module;

[0063] 110, back plate; 110a, receiving groove; 111, positioning structure; 111a, first positioning block; 111b, second positioning block; 111c, positioning groove;

[0064] 112, supporting part; 112a, supporting surface;

[0065] 120, optical film; 121, main body part; 122, film structure; 122a, first film through hole; 122b, second film through hole;

[0066] 123, fixing part; 124, film convex edge;

[0067] 120a, first optical film; 120b, second optical film; 120c, third optical film;

[0068] 130, colloid;

[0069] 140, light guide plate; 150, reflective film;

[0070] 10, vehicle;

[0071] X, first direction; Z, second direction; Y, third direction. Detailed implementation manners

[0072] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present application.

[0073] According to the first aspect of the present application, with reference to Figures 1 to 4 , Figure 8 , the present disclosure provides a backlight module 100, including a back plate 110 and an optical film 120.

[0074] Among them, the back plate 110 is formed or connected with: a receiving groove 110a and a positioning structure 111. The receiving groove 110a is used to receive the optical film 120, so that the back plate 110 can protect the optical film 120; the positioning structure 111 is used to position the optical film 120.

[0075] The optical film 120 is formed with: a film structure 122. The film structure 122 is provided with film through holes, and at least part of the positioning structure 111 passes through the film through holes to realize the positioning of the optical film 120 on the back plate 110.

[0076] Depending on the type, the optical film 120 can increase display brightness, light uniformity, fineness or privacy protection. Optionally, the optical film 120 includes one or more of a diffusion film, a brightness enhancement film, a light control film, a reflective polarizer, a quantum dot film and a privacy protection film.

[0077] Optionally, the back plate 110 is made of metal materials such as aluminum alloy or magnesium alloy, which has high strength.

[0078] Through the above technical solution, positioning is achieved by setting a positioning structure 111 on the back plate 110 and cooperating with the film structure 122 on the optical film 120; since the strength of the back plate 110 is relatively high, the strength of the positioning structure 111 can be increased, ensuring that the positioning structure 111 is not easily broken or failed under extreme conditions.

[0079] At the same time, compared with the prior art in which the positioning structure is set on the light guide plate, and the light guide plate is made of a transparent light-guiding material, it is easy to concentrate light to increase the brightness near the positioning structure. Because the positioning structure on the light guide plate is closer to the light-emitting area of ​​the backlight module, the edge of the light-emitting area is prone to uneven brightness. In the present application, the back plate 110 is made of a non-transparent light-guiding material, which will not concentrate light and cause uneven brightness at the edge of the light-emitting area.

[0080] The three comprehensive vibration tests mentioned above are used to test reliability requirements. They combine the three environmental stresses of temperature, humidity and vibration. They can more truly reflect the adaptability of electrical and electronic products to the complex environmental changes of temperature, humidity and vibration during actual use.

[0081] In some embodiments, the back plate 110 in the present application is a casting, and the molding method can be one of high-speed die-casting molding, low-speed die-casting molding, or semi-solid die-casting molding.

[0082] The optical film 120 and the back plate 110 are mechanically contacted and positioned by the positioning structure 111 and the film through-holes. Specifically, the positioning can be achieved by shape, size and surface features, relative position and mutual contact.

[0083] In some embodiments, reference Figure 2 and Figure 8 The optical film 120 further includes: a main body 121 .

[0084] The main body 121 is located in the receiving groove 110 a and at least covers the light-emitting area of ​​the backlight module 100 . The membrane structure 122 is connected to the periphery of the main body 121 , and the positioning structure 111 is close to the receiving groove 110 a .

[0085] It can be understood that both the positioning structure 111 and the diaphragm structure 122 are arranged outside the edge of the light-emitting area of the backlight module 100, and the distance from the edge of the light-emitting area is greater than 1 mm.

[0086] By arranging both the positioning structure 111 and the diaphragm structure 122 around the light-emitting area, the influence on the light-emitting area of the backlight module 100 is reduced.

[0087] In some embodiments, referring to Figure 1 and Figure 8 , the backplane 110 is provided with a plurality of positioning structures 111 in the first direction X (left-right direction), and the optical film 120 is provided with a plurality of diaphragm structures 122 at intervals in the first direction X.

[0088] By arranging a plurality of positioning structures 111 and diaphragm structures 122 to cooperate with each other in the first direction X, uniform positioning is achieved in the first direction X, and the stability of the optical film 120 is improved.

[0089] Here, the first direction X indicating the left-right direction is only for facilitating the introduction of the specific embodiments of the present application. There is no absolute corresponding relationship between the first direction X and the left-right direction. Similarly, there is no absolute corresponding relationship between the second direction Z and the up-down direction, and between the third direction Y and the front-back direction. Moreover, the first direction X, the second direction Z, and the third direction Y of the present application are only for expressing relative positional relationships. They only indicate the general orientation, rather than an absolute geometric relationship.

[0090] In an alternative solution, the plurality of diaphragm structures 122 on the optical film 120 can be connected as a whole.

[0091] In some embodiments, referring to Figure 1 and Figure 8 , the plurality of diaphragm structures 122 are arranged on the same side edge of the optical film 120.

[0092] Exemplarily, in the third direction Y (front-back direction), the plurality of diaphragm structures 122 are arranged on the front side edge of the optical film 120.

[0093] Adopting such an arrangement of the diaphragm structure 122, in high-temperature and low-temperature environments, the optical film 120 can only expand to one side in the third direction Y, for example, expand backward, avoiding complete positioning and blocking the normal contraction and expansion of the optical film 120, and improving the reliability in high-temperature and low-temperature environments.

[0094] In some embodiments, referring to Figures 1 to 3 , Figures 8 to 10, a part of the positioning structure 111 is configured to have a first positioning block 111a, and another part of the positioning structure 111 is configured to have a second positioning block 111b; a part of the diaphragm structure 122 is configured to have a first diaphragm through-hole 122a, and another part of the diaphragm structure 122 is configured to have a second diaphragm through-hole 122b.

[0095] The first positioning block 111a corresponds to the first diaphragm through-hole 122a, and the second positioning block 111b corresponds to the second diaphragm through-hole 122b, realizing multi-channel positioning in the first direction X.

[0096] As a preferred solution, in the first direction X, the first difference between the width of the first diaphragm through-hole 122a and the width of the first positioning block 111a is greater than the second difference between the width of the second diaphragm through-hole 122b and the width of the second positioning block 111b.

[0097] It can be understood that the fitting clearance between the first positioning block 111a and the first diaphragm through-hole 122a in the third direction Y (front-back direction) is small (for example, it can be 0.05 - 0.15 mm), and the fitting clearance between the second positioning block 111b and the second diaphragm through-hole 122b in the third direction Y (front-back direction) is also small (for example, it can be 0.05 - 0.15 mm). Thus, the optical diaphragm 120 is completely limited in the third direction Y, that is, the optical diaphragm 120 is not allowed to expand or contract and move forward, but is allowed to expand or contract and move backward.

[0098] The positioning structure 111 and the diaphragm structure 122 adopt various clearance fits in the first direction X. The clearance between the first diaphragm through-hole 122a and the first positioning block 111a can allow a larger displacement of the first positioning block 111a caused by the expansion or contraction of the optical diaphragm 120, while the displacement allowed by the clearance between the second diaphragm through-hole 122b and the second positioning block 111b is smaller, or even completely limited and the second positioning block 111b is not allowed to displace.

[0099] By adopting the above two kinds of fits of the positioning holes and the diaphragm through-holes, the optical diaphragm 120 can expand at high temperature and contract at low temperature normally along the first direction X, improving the reliability in high and low temperature environments. At the same time, it is ensured that the whole diaphragm does not deviate relative to the backplane 110.

[0100] Exemplarily, the value range of the fitting clearance between the second diaphragm through-hole 122b and the second positioning block 111b is 0.05 - 0.15 mm.

[0101] In some embodiments, referring to Figures 8 to 10 , in the first direction X, the second diaphragm through-hole 122b is arranged at the middle position of the optical diaphragm 120.

[0102] It can be understood that in the first direction X, the first diaphragm through-holes 122a are arranged on both sides of the second diaphragm through-holes 122b, and the first positioning blocks 111a are arranged on both sides of the second positioning blocks 111b.

[0103] By arranging the second diaphragm through-holes 122b at the middle position of the optical diaphragm 120, in high-temperature and low-temperature environments of the diaphragm, the optical diaphragm 120 can normally expand at high temperature and contract at low temperature to the left and right with the second diaphragm through-holes 122b or the second positioning blocks 111b as the center in the first direction X, improving the reliability in high-low temperature environments.

[0104] In some embodiments, the dimensions of the first positioning blocks 111a and the second positioning blocks 111b in the first direction X (left and right) are both greater than 1.5 mm, and the dimensions of the first positioning blocks 111a and the second positioning blocks 111b in the third direction Y (front and back) are both greater than 1.5 mm. The strength of the first positioning blocks 111a and the second positioning blocks 111b is improved, making them not easily break.

[0105] In some embodiments, referring to Figure 2 、 Figure 3 and Figure 9 , the positioning structure 111 further has: a positioning groove 111c. The positioning groove 111c is formed in the peripheral area of the receiving groove 110a for at least partial embedding of the optical diaphragm 120; the first positioning blocks 111a and the second positioning blocks 111b are respectively formed in the positioning groove 111c.

[0106] The diaphragm structure 122 further has: a diaphragm convex edge 124. It is formed in the peripheral area of the optical diaphragm 120 and protrudes from the edge of the optical diaphragm 120; the first diaphragm through-holes 122a and the second diaphragm through-holes 122b are respectively formed at the diaphragm convex edge 124, and the diaphragm convex edge 124 is embedded in the positioning groove 111c.

[0107] Through the setting of the positioning groove 111c and by respectively arranging the first positioning blocks 111a and the second positioning blocks 111b in the positioning groove 111c, while meeting the positioning requirements, the optical diaphragm 120 can be as close as possible to the bottom of the receiving groove 110a, reducing the thickness of the backlight module 100. Moreover, through the setting of the diaphragm convex edge 124, the first diaphragm through-holes 122a and the second diaphragm through-holes 122b can be far away from the light-emitting area of the backlight module 100, reducing the influence on the light output effect.

[0108] As a preferred solution, referring to Figure 2, in the first direction X, there is a gap between the left and right side walls of the positioning groove 111c and the left and right sides of the diaphragm convex edge 124. On the one hand, it can provide the displacement distance of the diaphragm convex edge 124 when the optical diaphragm 120 expands or contracts. On the other hand, the positioning groove 111c can play a part of the limiting role when the positioning block breaks or the diaphragm convex edge 124 is partially broken.

[0109] In some embodiments, referring to Figure 9 , the positioning groove 111c communicates with the receiving groove 110a, facilitating the assembly of the optical diaphragm 120 and the back plate 110.

[0110] In some embodiments, referring to Figures 5 to 10 , the back plate 110 has: a support portion 112. The support portion 112 is disposed in the peripheral area of the receiving groove 110a; the optical diaphragm 120 has: a fixing portion 123. The fixing portion 123 is disposed at the edge of the diaphragm structure 122; wherein, the fixing portion 123 is combined with the support portion 112 to fix the optical diaphragm 120 to the back plate 110.

[0111] The "combination" in the present application can be understood as detachable connection, fixed connection, contact, etc., which can achieve the fixed manner.

[0112] Compared with the prior art in which the support portion is disposed on the light guide plate, when the support portion 112 is disposed on the back plate 110 in the present application, since the back plate 110 is a non-transparent light guide material, it will not condense light to cause uneven brightness at the edge of the light emitting area.

[0113] In some embodiments, referring to Figures 5 to 10 , the backlight module 100 further includes: a colloid 130. The colloid 130 is disposed between the support portion 112 and the fixing portion 123 to bond and fix the support portion 112 and the fixing portion 123. The optical diaphragm 120 and the back plate 110 are fixed by bonding, facilitating assembly.

[0114] It can be understood that the colloid 130 can be formed by using double-sided tape or dispensing.

[0115] In some embodiments, referring to Figures 5 to 10 , a plurality of optical diaphragms 120 are stacked. The support portion 112 is provided with a plurality of support surfaces 112a, and the colloid 130 is attached to the support surfaces 112a. In the second direction Z parallel to the stacking direction of the optical diaphragms 120, the plurality of support surfaces 112a are located at different positions, and at least a part of the projections of the fixing portions 123 of two adjacent optical diaphragms 120 are staggered in the second direction Z.

[0116] The plurality of support surfaces 112a are located at different positions. It can be understood that the plurality of support surfaces 112a are respectively located at different heights and cooperate with the optical diaphragms 120 at different stacking positions. Referring toFigures 5 to 10 Taking the example of setting three support surfaces 112a for the three-layer optical film 120 and the support part 112, from bottom to top are the first optical film 120a, the second optical film 120b, and the third optical film 120c. The support surface 112a in the lower layer fixes the first optical film 120a, the support surface 112a in the middle layer fixes the second optical film 120b, and the support surface 112a in the upper layer fixes the third optical film 120c.

[0117] At least part of the projections of the fixing parts 123 of two adjacent optical films 120 in the second direction Z are staggered. Continuing to refer to Figures 5 to 10 It can be understood that the fixing part 123 of the first optical film 120a only extends to the position covering the support surface 112a in the lower layer, and other parts avoid the support surfaces 112a in the middle and upper layers. The fixing part 123 of the second optical film 120b can extend to cover the support surface 112a in the middle layer or cover the support surfaces 112a in the lower and middle layers at the same time, and other positions avoid the support surface 112a in the upper layer. The fixing part 123 of the third optical film 120c can extend to cover the support surface 112a in the upper layer or cover the positions of the three support surfaces 112a at the same time. In this way, the fixation of multiple optical films 120 is realized in sequence. Here, "covering" means that the projection of the support surface 112a in the second direction Z is located inside the projection of the fixing part 123 in the second direction Z.

[0118] By adopting the above-mentioned staggered arrangement of multiple support surfaces 112a and fixing parts 123, it is ensured that the optical film 120 in the lower layer will not cover the upper support surface 112a and affect the fixation of the upper-layer optical film 120.

[0119] In some embodiments, the fixing part 123 on the optical film 120 is arranged at intervals with the film structure 122, or is connected as a whole.

[0120] In some embodiments, referring to Figures 5 to 8 The multiple support surfaces 112a of the support part 112 form a stepped structure. By forming a continuous stepped structure with multiple support surfaces 112a, the structure is compact.

[0121] In some embodiments, referring to Figures 5 to 8 The colloid 130 is arranged in a stepped structure adapted to the shape of the support part 112.

[0122] In some embodiments, referring to Figure 8 In the first direction X, the support part 112 is arranged in the middle area of the back plate 110. So that in high-temperature and low-temperature environments, the optical film 120 can expand normally at high temperature and contract at low temperature from the area where the support part 112 is located to both left and right sides, improving reliability.

[0123] As a preferred solution, the two supporting parts 112 are symmetrically arranged on both sides of the first positioning block 111a. While improving the fixing effect on the optical film 120, it enables the optical film 120 on both sides of the first positioning block 111a to expand or contract uniformly.

[0124] Optionally, the type and quantity of the optical film 120 can be designed and matched according to the optical specifications of the backlight module 100, and it can be 2 - 5 layers.

[0125] Exemplarily, the number of layers of the optical film 120 illustrated in this patent is 3 layers.

[0126] In some embodiments, referring to Figure 4 and Figure 5 , the first positioning block 111a and the second positioning block 111b respectively protrude from the upper surface of the uppermost optical film 120 to prevent the optical film 120 from slipping out of the first positioning block 111a and the second positioning block 111b.

[0127] In some embodiments, referring to Figure 4 and Figure 8 , the backlight module 100 further includes: a light guide plate 140. The light guide plate 140 is disposed in the receiving groove 110a of the back plate 110 and is located between the bottom surface of the receiving groove 110a and the optical film 120. The light guide plate 140 is used to convert the linear light source of the lamp strip into a surface light source. Among them, the light guide plate 140.

[0128] In some embodiments, referring to Figure 4 , the backlight module 100 further includes: a reflective film 150. The reflective film 150 is disposed in the receiving groove 110a of the back plate 110 and is located between the bottom surface of the receiving groove 110a and the light guide plate 140, and is used to reflect part of the light back to the light guide plate 140 to enhance the light utilization efficiency and brightness.

[0129] According to the second aspect of the present disclosure, there is provided a vehicle-mounted display screen, which includes the above-mentioned backlight module 100. This vehicle-mounted display screen has all the beneficial effects of the above-mentioned backlight module 100, and the present disclosure will not elaborate herein.

[0130] In some embodiments, the vehicle-mounted display screen is one of an instrument screen, a center control screen, a co-pilot entertainment screen, a rear row entertainment screen, etc.

[0131] According to the third aspect of the present disclosure, referring to Figure 11 , there is provided a vehicle 10, which includes the above-mentioned vehicle-mounted display screen. This vehicle 10 has all the beneficial effects of the above-mentioned vehicle-mounted display screen, and the present disclosure will not elaborate herein.

[0132] The vehicle 10 may be a fuel vehicle, a plug-in hybrid vehicle, a new energy vehicle, etc., and the present disclosure does not make specific limitations thereto.

[0133] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0134] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0135] The embodiments, implementation manners and related technical features of the present application can be combined and replaced with each other without conflict.

[0136] The above are only the preferred embodiments of the present application and do not impose any form of limitation on the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of the technical solution of the present application.

Claims

1. A backlight module, characterized in that: include: Backplane and optical film; Wherein, the back plate is formed or connected with: A receiving groove, used for receiving the optical film; A positioning structure, used for positioning the optical film; The optical film is formed with: The diaphragm structure is provided with a diaphragm through hole, and at least part of the positioning structure is penetrated through the diaphragm through hole.

2. The backlight module according to claim 1, characterized in that: The optical film further comprises: A main body portion, at least covering the light-emitting area of ​​the backlight module and located in the receiving groove; Wherein, the diaphragm structure is connected to the periphery of the main body, and the positioning structure is close to the accommodating groove.

3. The backlight module according to claim 2, characterized in that: The back plate is provided with a plurality of positioning structures in the first direction, and the optical film is provided with a plurality of film structures in the first direction.

4. The backlight module according to claim 3, characterized in that: A plurality of the film structures are arranged on the same side edge of the optical film.

5. The backlight module according to claim 3, characterized in that: A part of the positioning structure is constructed to have a first positioning block, and another part of the positioning structure is constructed to have a second positioning block; A portion of the diaphragm structure is configured to have a first diaphragm through hole, and another portion of the diaphragm structure is configured to have a second diaphragm through hole; In a first direction, a first difference between a width of the first diaphragm through hole and a width of the first positioning block is greater than a second difference between a width of the second diaphragm through hole and a width of the second positioning block.

6. The backlight module according to claim 5, characterized in that: In the first direction, the second film through hole is arranged in the middle of the optical film.

7. The backlight module according to claim 5, characterized in that: The positioning structure also has: A positioning groove is formed in the peripheral area of ​​the receiving groove for at least partially embedding the optical film; Wherein, the first positioning block and the second positioning block are respectively formed in the positioning groove; The diaphragm structure also has: A film convex edge, formed in a peripheral area of ​​the optical film and protruding from an edge of the optical film; Wherein, the first diaphragm through hole and the second diaphragm through hole are respectively formed at the diaphragm convex edge, and the diaphragm convex edge is embedded in the positioning groove.

8. The backlight module according to claim 7, characterized in that: The positioning groove is communicated with the accommodating groove.

9. The backlight module according to any one of claims 1 to 8, characterized in that: The back plate has: A support portion, disposed in a peripheral area of ​​the receiving groove; The optical film has: A fixing portion, arranged at an edge of the diaphragm structure; Wherein, the fixing portion is combined with the supporting portion to fix the optical film to the back plate.

10. The backlight module according to claim 9, characterized in that: The backlight module also includes: The colloid is arranged between the supporting part and the fixing part so as to make the supporting part and the fixing part bonded and fixed.

11. The backlight module according to claim 10, characterized in that: The optical films are stacked in a plurality of layers, the support portion is provided with a plurality of support surfaces, and the colloid is attached to the support surfaces; In a second direction parallel to the stacking direction of the optical film, the plurality of support surfaces are located at different positions; At least parts of projections of the fixing portions of two adjacent optical films in the second direction are staggered.

12. The backlight module according to claim 11, characterized in that: The plurality of supporting surfaces of the supporting portion form a step structure.

13. The backlight module according to claim 9, characterized in that: In the first direction, the support portion is disposed in a middle region of the back plate.

14. The backlight module according to any one of claims 1 to 8, characterized in that: The backlight module also includes: A light guide plate, arranged in the receiving groove of the back plate; Wherein, the light guide plate is arranged between the bottom surface of the accommodating groove and the optical film.

15. A vehicle-mounted display screen, characterized in that: Comprising the backlight module as described in any one of claims 1-14.

16. A vehicle, characterized in that: Comprising the vehicle-mounted display screen as described in claim 15.

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