Backlight module capable of avoiding poor friction between light guide plate and reflector plate

Abstract

The utility model discloses a backlight module capable of avoiding poor friction between a light guide plate and a reflector plate, which comprises a lower frame, the reflector plate, the light guide plate and an optical film group, and is characterized in that the lower frame comprises a bottom plate and a side wall extending upwards from the edge of the bottom plate; the reflector plate, the light guide plate and the optical film set are sequentially arranged above the bottom plate from bottom to top in an overlapped mode, an FPC is arranged on the side wall, an LED lamp is fixed to the FPC, and a high-transmittance glass substrate is arranged between the light guide plate and the reflector plate. The high-transmittance glass substrate is arranged between the light guide plate and the reflector plate, so that the light guide plate is prevented from being in direct contact with the reflector plate, the reflector plate is prevented from wrinkling or damaging a microstructure on the lower surface of the light guide plate during vibration, abnormal display is avoided, and the competitiveness of a product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal display, and more specifically to a backlight module which can avoid bad friction between a light guide plate and a reflective sheet. Background Art

[0002] The light guide plate and reflective sheet in the backlight module are generally in direct contact. The backlight module, especially the vehicle-mounted backlight module, usually undergoes large vibrations, which can cause friction between the light guide plate and the reflective sheet, thereby causing wrinkles on the reflective sheet or damaging the microstructure on the lower surface of the light guide plate, resulting in display abnormalities and reducing the competitiveness of the product. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to avoid direct contact between the light guide plate and the reflective sheet, thereby preventing the reflective sheet from wrinkling or damaging the microstructure on the lower surface of the light guide plate during vibration, avoiding display abnormalities, and improving the competitiveness of the product.

[0004] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0005] In order to solve the above technical problems, the utility model provides a backlight module that avoids poor friction between a light guide plate and a reflective sheet, which includes a lower frame, a reflective sheet, a light guide plate and an optical film group, the lower frame includes a bottom plate and a side wall extending upward from the edge of the bottom plate, the reflective sheet, the light guide plate and the optical film group are stacked in sequence from bottom to top above the bottom plate, an FPC is arranged on the side wall, an LED lamp is fixed on the FPC, and a high-transmittance glass substrate is arranged between the light guide plate and the reflective sheet.

[0006] As a preferred implementation of the backlight module for avoiding bad friction between the light guide plate and the reflective sheet provided by the utility model, the high-transmittance glass substrate is smooth glass.

[0007] As a preferred implementation of the backlight module for avoiding poor friction between the light guide plate and the reflective sheet provided by the utility model, the roughness of the high-transmittance glass substrate is less than 0.01 μm.

[0008] As a preferred implementation of the backlight module for avoiding bad friction between the light guide plate and the reflective sheet provided by the utility model, the high-transmittance glass substrate is interference-fitted with the FPC and the side wall.

[0009] As a preferred implementation of the backlight module for avoiding poor friction between the light guide plate and the reflective sheet provided by the utility model, the thickness of the high-transmittance glass substrate is 0.5 mm.

[0010] As a preferred embodiment of the backlight module for avoiding poor friction between the light guide plate and the reflective sheet provided by the utility model, a protrusion is provided on the edge of the upper surface of the high-transmittance glass substrate, and the light guide plate is provided on the upper surface of the protrusion.

[0011] As a preferred implementation of the backlight module for avoiding poor friction between the light guide plate and the reflective sheet provided by the utility model, the cross-sectional shape of the protrusion is annular.

[0012] As a preferred implementation of the backlight module for avoiding bad friction between the light guide plate and the reflective sheet provided by the utility model, the height of the protrusion is 0.2 mm.

[0013] As a preferred implementation of the backlight module for avoiding bad friction between the light guide plate and the reflective sheet provided by the utility model, the protrusion is located in the non-visible area and surrounds the visible area.

[0014] As a preferred implementation of the backlight module for avoiding bad friction between the light guide plate and the reflective sheet provided by the utility model, a rubber pad is provided on the upper surface of the protrusion.

[0015] The utility model has the following beneficial effects:

[0016] Since a high-transmittance glass substrate is arranged between the light guide plate and the reflective sheet, direct contact between the light guide plate and the reflective sheet is avoided, thereby preventing the reflective sheet from wrinkling or damaging the microstructure on the lower surface of the light guide plate during vibration, thereby avoiding display abnormalities and improving product competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 The utility model provides a structural schematic diagram of a backlight module for avoiding bad friction between a light guide plate and a reflective sheet.

[0019] Figure 2 for Figure 1 Schematic diagram of the improved structure of medium and high transmittance glass substrate.

[0020] Figure 3 for Figure 2 Top view after hiding the rubber pad.

[0021] Description of Figure Numbers:

[0022] Lower frame 1; reflector 2; light guide plate 3; optical film group 4; bottom plate 11; side wall 12; FPC 5; LED lamp 6; high-transmittance glass substrate 7;

[0023] Protrusion 71; Rubber pad 72. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] The utility model provides a backlight module that avoids bad friction between a light guide plate and a reflective sheet, which includes a lower frame, a reflective sheet, a light guide plate and an optical film group, the lower frame includes a bottom plate and a side wall extending upward from the edge of the bottom plate, the reflective sheet, the light guide plate and the optical film group are stacked in sequence from bottom to top above the bottom plate, an FPC is arranged on the side wall, an LED lamp is fixed on the FPC, and a high-transmittance glass substrate is arranged between the light guide plate and the reflective sheet.

[0028] Since a high-transmittance glass substrate is arranged between the light guide plate and the reflective sheet, direct contact between the light guide plate and the reflective sheet is avoided, thereby preventing the reflective sheet from wrinkling or damaging the microstructure on the lower surface of the light guide plate during vibration, thereby avoiding display abnormalities and improving product competitiveness.

[0029] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention.

[0030] See also Figure 1 The utility model provides a backlight module that avoids bad friction between the light guide plate 3 and the reflective sheet 2, which includes a lower frame 1, a reflective sheet 2, a light guide plate 3 and an optical film group 4. The lower frame 1 includes a bottom plate 11 and a side wall 12 extending upward from the edge of the bottom plate 11. The reflective sheet 2, the light guide plate 3 and the optical film group 4 are sequentially stacked and arranged above the bottom plate 11 from bottom to top. An FPC 5 is arranged on the side wall 12, and an LED lamp 6 is fixed on the FPC 5. A high-transmittance glass substrate 7 is arranged between the light guide plate 3 and the reflective sheet 2. Since the high-transmittance glass substrate 7 is arranged between the light guide plate 3 and the reflective sheet 2, the light guide plate 3 and the reflective sheet 2 are prevented from directly contacting each other, thereby preventing the reflective sheet 2 from wrinkling or damaging the microstructure on the lower surface of the light guide plate 3 during vibration, thereby avoiding display abnormalities and improving the competitiveness of the product.

[0031] Furthermore, the high-transmittance glass substrate 7 is made of smooth glass to reduce the friction between the high-transmittance glass substrate 7 and the reflector 2 and the light guide plate 3, thereby preventing the reflector 2 from wrinkling or damaging the microstructure on the lower surface of the light guide plate 3 during vibration.

[0032] Furthermore, the roughness of the high-transmittance glass substrate 7 is less than 0.01 μm, which further reduces the friction between the high-transmittance glass substrate 7 and the reflective sheet 2 and the light guide plate 3 .

[0033] Furthermore, the high-transmittance glass substrate 7 is interference-fitted with the FPC 5 and the side wall 12 to prevent the high-transmittance glass substrate 7 from vibrating and causing wrinkles on the reflective sheet 2 or damaging the microstructure on the lower surface of the light guide plate 3 .

[0034] Furthermore, the thickness of the high-transmittance glass substrate 7 is 0.5 mm.

[0035] See also Figure 2 and Figure 3As a further optimization scheme of Example 1, in this embodiment, a protrusion 71 is provided on the edge of the upper surface of the high-transmittance glass substrate 7, and the light guide plate 3 is provided on the upper surface of the protrusion 71 to avoid friction between the high-transmittance glass substrate 7 and the lower surface of the light guide plate 3, thereby avoiding damage to the microstructure of the lower surface of the light guide plate 3.

[0036] Furthermore, the cross-sectional shape of the protrusion 71 is annular.

[0037] Furthermore, the height of the protrusion 71 is 0.2 mm.

[0038] Furthermore, the protrusion 71 is located in the non-visible area and surrounds the visible area to avoid affecting the display effect.

[0039] Furthermore, a rubber pad 72 is provided on the upper surface of the protrusion 71 so that the light guide plate 3 is firmly fixed on the top of the high-transmittance glass substrate 7 to reduce friction.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A backlight module for preventing poor friction between a light guide plate and a reflective sheet, characterized in that: It includes a lower frame, a reflective sheet, a light guide plate and an optical film group. The lower frame includes a bottom plate and a side wall extending upward from the edge of the bottom plate. The reflective sheet, the light guide plate and the optical film group are stacked in sequence from bottom to top above the bottom plate. An FPC is arranged on the side wall, and an LED lamp is fixed on the FPC. A high-transmittance glass substrate is arranged between the light guide plate and the reflective sheet.

2. The backlight module for preventing poor friction between the light guide plate and the reflective sheet according to claim 1, characterized in that: The high-transmittance glass substrate is smooth glass.

3. The backlight module for preventing poor friction between the light guide plate and the reflective sheet according to claim 2, characterized in that: The roughness of the high-transmittance glass substrate is less than 0.01 μm.

4. The backlight module for preventing poor friction between the light guide plate and the reflective sheet according to claim 1, characterized in that: The high-transmittance glass substrate is interference-fitted with the FPC and the side wall.

5. The backlight module for preventing poor friction between the light guide plate and the reflective sheet according to claim 1, characterized in that: The thickness of the high-transmittance glass substrate is 0.5 mm.

6. The backlight module for preventing poor friction between the light guide plate and the reflective sheet according to claim 1, characterized in that: A protrusion is arranged on the edge of the upper surface of the high-transmittance glass substrate, and the light guide plate is arranged on the upper surface of the protrusion.

7. The backlight module for preventing bad friction between the light guide plate and the reflective sheet according to claim 6, characterized in that: The cross-sectional shape of the protrusion is annular.

8. The backlight module for preventing poor friction between the light guide plate and the reflective sheet according to claim 6, characterized in that: The height of the protrusion is 0.2 mm.

9. The backlight module for preventing bad friction between the light guide plate and the reflective sheet according to claim 6, characterized in that: The protrusion is located in the non-viewing area and surrounds the viewing area.

10. The backlight module for preventing bad friction between the light guide plate and the reflective sheet according to claim 6, characterized in that: A rubber pad is arranged on the upper surface of the protrusion.

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