An on-vehicle backlight display module for improving product surface uniformity

Abstract

The utility model discloses a kind of promote product face uniformity vehicle-mounted backlight display module, it is related to vehicle-mounted display module technical field, including module body, the module body includes backplate, the backplate is equipped with control panel inside, the upper end surface of the control panel is fixedly equipped with reflecting film, the periphery of the backplate is fixedly equipped with lower border, the inner wall of the lower border is equipped with FPC connecting line, the FPC connecting line is equipped with LED assembly, the upper of the reflecting film is equipped with light guide plate, the utility model display module is by between square package LED lamp pearl and light guide plate additional arc light guide component, the original luminous angle of square package LED lamp pearl is evenly scattered to no dead angle, to effectively eliminate the straight light ray dark area caused by square package LED lamp pearl assembly technology and tolerance, ensure that light guide plate surface obtains the uniform illumination of overall coverage, significantly improve the face uniformity and imaging effect of backlight display module, very good meet customer demand.

Description

Technical Field

[0001] This utility model relates to the field of automotive display module technology, specifically to an automotive backlight display module that improves the uniformity of product surface. Background Technology

[0002] As described in the published patent CN213581675U, "A Display Backlight Module with Uniform Light Source Distribution," the so-called backlight is a light source located behind the liquid crystal display, and its luminous effect directly affects the visual effect of the liquid crystal display module. The liquid crystal itself does not emit light; it displays graphics or characters as a result of its modulation of light.

[0003] The backlight modules for displays on the market do not distribute the reflected light evenly enough, resulting in poor image quality.

[0004] like Figure 1 and 2 As shown, in the related technologies of display screen backlight modules, the square packaged LEDs of the side-lit backlight display module directly illuminate the light guide plate 107. The light emission angle of the square packaged LEDs is generally around 110 degrees. Due to the assembly process of the square packaged LEDs on the light strip and the tolerance of the square packaged LEDs themselves, there will be a dark area B (the direct light is not completely covered) in the light emitted by the adjacent square packaged LEDs on the light guide plate 107. As a result, some areas of the light guide plate 107 will not have direct light, resulting in poor uniformity of display effect and the surface uniformity of the product will not meet the customer's requirements. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution for improving the uniformity of product surfaces in automotive backlight display modules, thereby solving the aforementioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A vehicle-mounted backlight display module for improving product surface uniformity includes a module body, the module body includes a back plate, a central control plate is installed inside the back plate, a reflective film is fixedly installed on the upper surface of the central control plate, a lower frame is fixedly installed on the periphery of the back plate, an FPC connecting line is installed on the inner wall of the lower frame, and an LED component is installed on the FPC connecting line. A light guide plate is installed above the reflective film; The LED assembly includes a plurality of square-encapsulated LED beads that are uniformly fixed along the length of the FPC connection line, and an arc-shaped light guide assembly is installed between the square-encapsulated LED beads and the light guide plate.

[0007] As a further embodiment of this utility model: the arc-shaped light guide assembly includes an arc-shaped light guide sleeve fixed on a square-encapsulated LED bead, the arc-shaped light guide sleeve spanning directly above the square-encapsulated LED bead.

[0008] As a further embodiment of this utility model: the arc-shaped light guide sleeve is flat, and the thickness of the flat arc-shaped light guide sleeve is the same as the thickness of the light guide plate.

[0009] As a further embodiment of this utility model: the arc-shaped light guide sleeve is semi-circular, and a socket groove is provided below the arc-shaped light guide sleeve, and the square packaged LED lamp bead is installed in the socket groove.

[0010] As a further embodiment of this utility model: the arc-shaped light guide component includes a light guide strip, the light guide strip is fixed on the lower frame, and a plurality of first arc-shaped light guide grooves corresponding one-to-one with square packaged LED beads are formed on the light guide strip along the length direction.

[0011] As a further embodiment of this utility model: a diffusion film is installed above the light guide plate, the diffusion film is fixedly attached to the light guide plate, positioning posts are formed at the four corners of the upper surface of the light guide plate, and a first positioning groove is formed at the four corners of the diffusion film to align with the positioning posts.

[0012] As a further embodiment of this utility model: upper and lower brightness enhancement films are fixedly attached to the top of the diffusion film, the lower brightness enhancement film is fixedly attached to the diffusion film, the upper brightness enhancement film is fixedly attached to the lower brightness enhancement film, and second positioning grooves that align and cooperate with positioning posts are respectively opened at the four corners of the upper and lower brightness enhancement films.

[0013] As a further embodiment of this utility model: a middle frame is fastened to the lower frame, and the middle frame is used to fix and limit the FPC connecting line and LED assembly.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model of display module adds an arc-shaped light guide component between the square packaged LED beads and the light guide plate, which evenly disperses the original light emission angle of the square packaged LED beads to a point without dead angles. This effectively eliminates the dark areas of direct light caused by the assembly process and tolerances of the square packaged LED beads, ensuring that the surface of the light guide plate is fully covered with uniform illumination. This significantly improves the surface uniformity and imaging effect of the backlight display module, and well meets customer needs.

[0015] By using an arc-shaped optical surface to refract and scatter the approximately 110-degree narrow-angle beam emitted by square-packaged LED beads, the light is forced to spread symmetrically and uniformly to a wide-angle range of nearly 180 degrees. This eliminates the "dark areas" between adjacent LED beads that are not covered by direct light due to the limitations of the light emission angle of square-packaged LED beads and assembly tolerances, ensuring that the light-injection surface of the light guide plate receives continuous and full light injection. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an LED component in related technologies; Figure 2 yes Figure 1 A partial view at point A in the middle; Figure 3 This is an exploded view of the structure of this utility model; Figure 4 This is another exploded view of the structure of this utility model; Figure 5 This is a schematic diagram of the LED component in this utility model; Figure 6 yes Figure 5 A partial view at point C; Figure 7 This is a three-dimensional structural view of the arc-shaped light guide sleeve in one embodiment; Figure 8 This is a three-dimensional view of the arc-shaped light guide sleeve in another embodiment; Figure 9 This is a three-dimensional view of the structure of the light guide strip in one embodiment; Figure 10 This is another exploded view of the structure of this utility model; Figure 11 This is a three-dimensional structural view of the present invention; Figure 12 This is another three-dimensional view of the structure of this utility model; The reference numerals and names in the figure are as follows: Module body - 100, back plate - 101, central control board - 102, reflective film - 103, lower frame - 104, FPC connecting line - 105, LED component - 106, light guide plate - 107, square packaged LED beads - 108, arc-shaped light guide component - 109, arc-shaped light guide sleeve - 110, socket groove - 111, light guide strip - 112, first arc-shaped light guide groove - 113, diffuser film - 114, positioning post - 115, first positioning groove - 116, upper brightness enhancement film - 117, lower brightness enhancement film - 118, second positioning groove - 119, middle frame - 120. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-12 A vehicle-mounted backlight display module for improving product surface uniformity includes a module body 100. The module body 100 includes a back plate 101. A central control plate 102 is installed inside the back plate 101. A reflective film 103 is fixedly installed on the upper surface of the central control plate 102. A lower frame 104 is fixedly installed on the periphery of the back plate 101. An FPC connecting line 105 is installed on the inner wall of the lower frame 104. An LED component 106 is installed on the FPC connecting line 105. A light guide plate 107 is installed above the reflective film 103; like Figure 2 and 3 As shown, by adding an arc-shaped light guide component 109 between the square packaged LED lamp bead 108 and the light guide plate 107, and designing the optical surface of the arc-shaped light guide component 109, the arc-shaped light guide component 109 can refract and diffuse the light beam emitted by the square packaged LED lamp bead 108 with an initial angle of about 110 degrees, thereby achieving a wide-angle uniform divergence of nearly 180 degrees. The LED assembly 106 includes a plurality of square-encapsulated LED beads 108 uniformly fixed along the length of the FPC connection line 105, and an arc-shaped light guide assembly 109 is installed between the square-encapsulated LED beads 108 and the light guide plate 107. First, it eliminates the "dark area" that is inevitably caused by the limited LED light-emitting angle, assembly tolerance and spacing in the side-lit module in related technologies, and ensures that the light-incident surface of the light guide plate 107 receives full and seamless light injection; Secondly, by forcing light to diffuse uniformly at a large angle, the propagation path and density distribution of light inside the light guide plate 107 are optimized. Combined with the dot design of the upper light guide plate 107 and the bottom reflective film 103, the light emitted from the light-emitting surface of the backlight display module achieves uniformity in brightness and color, significantly improving the uniformity of the optical surface. Furthermore, it effectively reduces the stringent requirements for the mounting precision of the square packaged LED beads 108, relaxes the process tolerance range, and thus improves production yield and reliability. This utility model's display module adds an arc-shaped light guide component 109 between the square-packaged LED beads 108 and the light guide plate 107, which evenly diffuses the original light emission angle of the square-packaged LED beads 108 from approximately 110 degrees to 180 degrees without dead angles. This effectively eliminates the dark areas of direct light caused by the assembly process and tolerances of the square-packaged LED beads 108, ensuring that the surface of the light guide plate 107 receives uniform illumination with full coverage, and significantly improving the surface uniformity and imaging effect of the backlight display module.

[0019] In this embodiment of the present invention, the arc-shaped light guide assembly 109 includes an arc-shaped light guide sleeve 110 fixed on the square packaged LED bead 108, and the arc-shaped light guide sleeve 110 spans directly above the square packaged LED bead 108. like Figure 5 , 6 As shown in Figure 7, by directly fixing the arc-shaped light guide sleeve 110 above the square packaged LED bead 108, the arc-shaped optical surface refracts and scatters the approximately 110-degree narrow-angle light beam emitted by the square packaged LED bead 108, forcing the light to diffuse symmetrically and uniformly to a wide-angle range of nearly 180 degrees; eliminating the "dark area" where the direct light between adjacent LED beads is not covered due to the limitation of the light emission angle of the square packaged LED bead 108 and the assembly tolerance, ensuring that the light-incident surface of the light guide plate 107 receives continuous and full light injection.

[0020] In this embodiment of the present invention, the arc-shaped light guide sleeve 110 is flat and the thickness of the flat arc-shaped light guide sleeve 110 is the same as the thickness of the light guide plate 107. like Figure 5 , 6 As shown in Figure 7, the flat arc-shaped light guide sleeve 110 is used to fix the square packaged LED lamp bead 108, ensuring that the light is efficiently collected and uniformly refracted and diffused along the arc surface of the arc-shaped light guide sleeve 110. At the same time, the flat design of the arc-shaped light guide sleeve 110 and the thickness being consistent with the light guide plate 107 make the entire optical component structure compact and seamlessly integrated, effectively controlling the overall thickness of the module and the assembly gap.

[0021] In this embodiment of the invention, the arc-shaped light guide sleeve 110 is semi-circular, and a socket groove 111 is provided below the arc-shaped light guide sleeve 110. The square-encapsulated LED bead 108 is installed in the socket groove 111. like Figure 5 , 6 As shown in Figure 8, by designing a semi-circular light guide sleeve with a sleeve groove 111, the sleeve is fixed to the square packaged LED lamp bead 108, ensuring that the light is efficiently collected and uniformly refracted and diffused along the arc surface of the arc light guide sleeve 110, effectively controlling the overall thickness of the module and the assembly gap, and avoiding stray light loss.

[0022] In this embodiment of the utility model, the arc-shaped light guide component 109 includes a light guide strip 112, which is fixed on the lower frame 104. The light guide strip 112 has a plurality of first arc-shaped light guide grooves 113 that correspond one-to-one with the square packaged LED beads 108 along the length direction. like Figure 9 As shown, the light emitted by each square packaged LED bead 108 is captured and guided by the arc-shaped inner surface of the corresponding first arc-shaped light guide groove 113, and diffused uniformly after refraction and scattering, so as to achieve continuous and uniform distribution of light on the light-incident surface of the light guide plate 107. The integrated design replaced multiple independent arc-shaped light guide sleeves 110, simplifying the assembly process and improving production efficiency and assembly accuracy. The overall structure of the light guide strip 112 ensures the consistency and coordination of the optical characteristics between each light-emitting unit, further eliminating local dark areas or bright spots; The structure is more stable, reducing the risk of component loosening or displacement and improving the long-term reliability of the module.

[0023] In this embodiment of the present invention, a diffusion film 114 is installed above the light guide plate 107. The diffusion film 114 is fixedly attached to the light guide plate 107. A positioning post 115 is formed at the corner of the upper surface of the light guide plate 107. A first positioning groove 116 that aligns with the positioning post is opened at the corner of the diffusion film 114. like Figure 4 and 10 As shown, by fixing the diffusion film 114 to the top of the light guide plate 107, the diffusion film 114 performs secondary scattering and diffuse reflection of light, further homogenizing the distribution of light emitted from the light guide plate 107; at the same time, by forming a positioning post 115 at the corner of the light guide plate 107 and opening a first positioning groove 116 at the corresponding position of the diffusion film 114, the positioning and rapid assembly between the two are realized, effectively preventing the film material from shifting or wrinkling during the assembly process; It improves the visual uniformity of the light-emitting surface and eliminates any possible residual bright spots or light spots; secondly, the positioning structure ensures the consistency of the relative positions between optical components, improving the stability and repeatability of optical performance; it simplifies the assembly process, improves production efficiency and product yield, and provides an integrated solution for automotive backlight modules with higher reliability, lower assembly difficulty and better optical performance.

[0024] In this embodiment of the present invention, an upper and a lower brightness enhancement film 118 are fixedly attached to the upper part of the diffusion film 114, the lower brightness enhancement film 118 is fixedly attached to the diffusion film 114, the upper brightness enhancement film 117 is fixedly attached to the lower brightness enhancement film 118, and a second positioning groove 119 that aligns with the positioning post is respectively opened at the four corners of the upper and lower brightness enhancement films 118. like Figure 4 and 10 As shown, by fixing the lower brightness enhancement film 118 above the diffusion film 114 and then attaching the upper brightness enhancement film 117 to the lower brightness enhancement film 118, a multi-layer optical film stack is formed. The light homogenized by the diffusion film 114 passes through the lower and upper brightness enhancement films one after another. By using the prisms or microstructure arrays designed on the surface of the brightness enhancement film, the light scattered at a large angle is focused towards the front of the display panel, thereby significantly improving the axial brightness and optical utilization within the viewing angle. Meanwhile, the second positioning grooves 119 opened at the corners of the upper and lower brightness enhancement films 118 and matched with the positioning posts of the light guide plate 107 ensure that each layer of film material can be quickly aligned and fixed during the stacking and assembly. Through the synergistic effect of the two-layer brightness enhancement film, the front light output brightness and overall light efficiency of the backlight module are greatly improved, meeting the visibility requirements of automotive displays under strong ambient light. Secondly, the positioning structure ensures the consistency of the microstructure orientation of each layer of optical film, avoiding assembly deviations and ensuring the stability and reliability of optical performance. This layering and positioning design improves membrane assembly efficiency and product yield, and enhances the bonding stability between membrane layers, preventing displacement or detachment during use.

[0025] In this embodiment of the utility model, a middle frame 120 is fastened to the lower frame 104, and the middle frame 120 is used to fix and limit the FPC connecting line 105 and the LED assembly 106. like Figure 10 , 11 As shown in Figure 12, the snap-fit ​​design of the middle frame 120 simplifies the assembly process, improves production efficiency, and ensures a tight connection and structural integrity between frame components. By effectively fixing the FPC connection line 105, the loosening of the line, poor contact or signal interference caused by vehicle vibration or temperature changes is avoided, thus improving the reliability of the electrical connection. Furthermore, the stable positioning of the LED component 106 ensures the long-term stability of the relative position between the lamp bead and the arc-shaped light guide component 109, preventing the decrease in optical uniformity caused by displacement.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A vehicle-mounted backlight display module for improving product surface uniformity, characterized in that, The module includes a module body (100), which includes a back plate (101). A central control plate (102) is installed inside the back plate (101). A reflective film (103) is fixedly installed on the upper surface of the central control plate (102). A lower frame (104) is fixedly installed on the periphery of the back plate (101). An FPC connecting line (105) is installed on the inner wall of the lower frame (104). An LED component (106) is installed on the FPC connecting line (105). A light guide plate (107) is installed above the reflective film (103). The LED assembly (106) includes a plurality of square-encapsulated LED beads (108) uniformly fixed along the length of the FPC connection line (105), and an arc-shaped light guide assembly (109) is installed between the square-encapsulated LED beads (108) and the light guide plate (107).

2. The automotive backlight display module for improving product surface uniformity according to claim 1, characterized in that, The arc-shaped light guide assembly (109) includes an arc-shaped light guide sleeve (110) fixed on a square-encapsulated LED bead (108), the arc-shaped light guide sleeve (110) spanning directly above the square-encapsulated LED bead (108).

3. A vehicle-mounted backlight display module for improving product surface uniformity according to claim 2, characterized in that, The arc-shaped light guide sleeve (110) is flat, and the thickness of the flat arc-shaped light guide sleeve (110) is the same as the thickness of the light guide plate (107).

4. A vehicle-mounted backlight display module for improving product surface uniformity according to claim 2, characterized in that, The arc-shaped light guide sleeve (110) is semi-circular, and a socket groove (111) is provided below the arc-shaped light guide sleeve (110). The square packaged LED lamp bead (108) is installed in the socket groove (111).

5. A vehicle-mounted backlight display module for improving product surface uniformity according to claim 1, characterized in that, The arc-shaped light guide assembly (109) includes a light guide strip (112), which is fixed on the lower frame (104). The light guide strip (112) has several first arc-shaped light guide grooves (113) that correspond one-to-one with the square packaged LED beads (108) along the length direction.

6. A vehicle-mounted backlight display module for improving product surface uniformity according to claim 1, characterized in that, A diffusion film (114) is installed above the light guide plate (107). The diffusion film (114) is fixedly attached to the light guide plate (107). A positioning post (115) is formed at the four corners of the upper surface of the light guide plate (107). A first positioning groove (116) that aligns with the positioning post is opened at the four corners of the diffusion film (114).

7. A vehicle-mounted backlight display module for improving product surface uniformity according to claim 6, characterized in that, An upper brightness enhancement film (117) and a lower brightness enhancement film (118) are fixedly attached to the upper surface of the diffusion film (114). The lower brightness enhancement film (118) is fixedly attached to the diffusion film (114), and the upper brightness enhancement film (117) is fixedly attached to the lower brightness enhancement film (118). The upper brightness enhancement film (117) and the lower brightness enhancement film (118) are respectively provided with second positioning grooves (119) at the four corners to align with the positioning posts.

8. A vehicle-mounted backlight display module for improving product surface uniformity according to claim 7, characterized in that, A middle frame (120) is fastened to the lower frame (104), and the middle frame (120) is used to fix and limit the FPC connecting line (105) and the LED assembly (106).

Images