Anti-light-leakage drilling module

Abstract

The utility model discloses a light leakage prevention drilling module which comprises a liquid crystal panel and a backlight module, and finger needle holes penetrating through the liquid crystal panel and the backlight module in the thickness direction are formed in the liquid crystal panel and the backlight module. The backlight module comprises a backlight frame and a light guide plate arranged in the backlight frame; the backlight frame comprises a bottom plate, an inner side wall and an outer side wall, the inner side wall is arranged on the bottom plate and surrounds the periphery of the finger needle hole, the outer side wall is arranged on the bottom plate and surrounds the periphery of the light guide plate, and the top of the inner side wall is fixedly bonded with the bottom surface of the liquid crystal panel through an inner side shading rubber material. According to the light leakage prevention drilling module, the light leakage problem at the position of the pointer hole can be solved.

Description

Technical Field

[0001] The utility model relates to display technology, in particular to a light leakage prevention drilling module. Background Art

[0002] At present, the development of smart watches is in full swing, and more and more products use LCD on display terminals such as watches and instruments. However, most watches and instruments using LCD are purely electronic displays, that is, the pointers and dials are electronic displays. As people's demand for the experience of electronic products and their curiosity about new technologies grows, the market demand for LCD modules with mechanical pointer functions is also growing. On the other hand, the automotive industry's demand for LCD modules with mechanical pointers to replace traditional instruments is becoming more and more urgent.

[0003] The Chinese patent with announcement number CN206162009U discloses a liquid crystal display module, including a backlight source and a display panel, wherein the backlight source includes a metal frame with a hollow pattern on the bottom surface, a light guide plate with a hollow pattern arranged in the metal frame, and a light bar is arranged between the light incident surface of the light guide plate and the glue frame; the display panel includes a TFT substrate and a CF substrate arranged relatively, the TFT substrate and the CF substrate are sealed and fixed by sealants on the outside and inside, and filled with liquid crystal material, and the TFT substrate and the CF substrate are provided with through holes in the area corresponding to the hollow pattern. The backlight source and the display panel of the liquid crystal display module can be provided with mechanical pointers in the hollow pattern area by providing hollow patterns in the corresponding areas, so that the liquid crystal display module is widely used in display terminals with mechanical pointer functions such as watches and instruments.

[0004] However, since the backlight source and the display panel of the above-mentioned liquid crystal display module are not blocked on the inner wall of the hollow pattern, the light in the light guide plate is easy to leak into the hollow pattern. At the same time, the light in the display panel is also easy to leak into the hollow pattern through refraction / scattering of the TFT substrate and the CF substrate. In other words, there is a light leakage problem at the hollow pattern. Utility Model Content

[0005] In order to solve the above-mentioned deficiencies of the prior art, the utility model provides an anti-light leakage drilling module, which can reduce the light leakage problem at the pointer hole.

[0006] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0007] A light leakage prevention drilling module comprises a liquid crystal panel and a backlight module, wherein the liquid crystal panel and the backlight module are provided with pointer holes penetrating along the thickness direction; the backlight module comprises a backlight frame and a light guide plate arranged in the backlight frame; the backlight frame comprises a bottom plate, an inner side wall and an outer side wall, wherein the inner side wall is arranged on the bottom plate and surrounds the periphery of the pointer hole, the outer side wall is arranged on the bottom plate and surrounds the periphery of the light guide plate, and the top of the inner side wall is bonded and fixed to the bottom surface of the liquid crystal panel by an inner light-shielding adhesive material.

[0008] Furthermore, the inner light-shielding adhesive material is a light-shielding tape or a light-shielding foam.

[0009] Furthermore, the inner light-shielding adhesive material is a black tape or black foam.

[0010] Furthermore, a light strip is provided between the light guide plate and the outer side wall, or between the light guide plate and the bottom plate.

[0011] Furthermore, the liquid crystal panel is provided with a first light-shielding ink or a first light-reflecting coating on the inner wall of the pointer hole.

[0012] Furthermore, the first light-shielding ink is black ink, or the first light-reflecting coating is a metal coating.

[0013] Furthermore, the first light-shielding ink or the first light-reflecting coating extends to the inner wall of the backlight module and the inner light-shielding adhesive material.

[0014] Furthermore, the anti-light leakage drilling module also includes a pointer component, and the pointer component is arranged in the pointer holes of the liquid crystal panel and the backlight module.

[0015] Furthermore, the pointer assembly is provided with a second light-shielding ink or a second light-reflecting coating on the outer wall in the pointer hole.

[0016] Furthermore, the second light-shielding ink is black ink, or the second light-reflecting coating is a metal coating.

[0017] The utility model has the following beneficial effects: the anti-light leakage drilling module of the utility model extends the inner side wall of the backlight frame upward into the pointer hole to block the inner wall of the light guide plate at the pointer hole, preventing light leaking from the inner wall of the light guide plate from entering the pointer hole, and the inner side light-shielding glue material is arranged between the inner side wall of the backlight frame and the bottom surface of the liquid crystal panel for filling, so as to prevent light in the gap between the liquid crystal panel and the backlight module from entering the pointer hole, thereby reducing the light leakage problem at the pointer hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a plan view of the light leakage prevention drilling module provided by the utility model.

[0019] Figure 2 for Figure 1 The AA cross-sectional diagram of the anti-light leakage drilling module is shown.

[0020] Figure 3 The present invention is a cross-sectional schematic diagram of another light leakage prevention drilling module provided by the present invention.

[0021] Figure 4 A cross-sectional schematic diagram of another light leakage prevention drilling module provided by the utility model DETAILED DESCRIPTION

[0022] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, 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 having 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 limiting the present invention.

[0023] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] 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 technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1

[0026] like Figure 1 and 2 As shown, an anti-light leakage drilling module includes a liquid crystal panel 10 and a backlight module 20, wherein the liquid crystal panel 10 and the backlight module 20 are provided with a pointer hole B penetrating along the thickness direction.

[0027] The liquid crystal panel 10 includes an upper substrate 12 and a lower substrate 14 that are arranged opposite to each other. An upper polarizer 11 is arranged on the surface of the upper substrate 12 on the side facing away from the lower substrate 14, and a lower polarizer 15 is arranged on the surface of the lower substrate 14 on the side facing away from the upper substrate 12. The pointer hole B passes through the upper polarizer 11, the upper substrate 12, the lower substrate 14 and the lower polarizer 15 in sequence along the thickness direction. An inner sealant 16 and an outer sealant 17 are arranged between the upper substrate 12 and the lower substrate 14. The inner sealant 16 surrounds the periphery of the pointer hole B, and the outer sealant 17 surrounds the periphery of the upper substrate 12 and the lower substrate 14. The liquid crystal material 13 is injected into the sealed space enclosed by the upper substrate 12, the lower substrate 14, the inner sealant 16 and the outer sealant 17.

[0028] The backlight module 20 includes a backlight frame 21 and a light guide plate 22, a light strip 23 and an optical film assembly 24 arranged in the backlight frame 21, the light strip 23 is arranged on the light incident surface of the light guide plate 22, and the optical film assembly 24 is arranged on the light exit surface of the light guide plate 22; the pointer hole B passes through the optical film assembly 24, the light guide plate 22 and the backlight frame 21 in sequence along the thickness direction; the backlight frame 21 includes a bottom plate 211, an inner wall 212 and an outer wall 213, the inner wall 212 is arranged on the bottom plate 211 and surrounds the periphery of the pointer hole B, and the outer wall 213 is arranged on the bottom plate 211 and surrounds the periphery of the light guide plate 22; the light guide plate 22, the light strip 23 and the optical film assembly 24 are assembled in an assembly space enclosed by the bottom plate 211, the inner wall 212 and the outer wall 213.

[0029] The top of the inner wall 212 is bonded and fixed to the bottom surface (lower polarizer 15 ) of the liquid crystal panel 10 via an inner light-shielding adhesive material 50 .

[0030] The anti-light leakage drilling module of the utility model extends the inner side wall 212 of the backlight frame 21 upward into the pointer hole B to block the inner wall of the light guide plate 22 at the pointer hole B, thereby preventing the light leaking from the inner wall of the light guide plate 22 from entering the pointer hole B, and the inner side light-shielding glue material 50 is arranged between the inner side wall 212 of the backlight frame 21 and the bottom surface of the liquid crystal panel 10 for filling, thereby preventing the light in the gap between the liquid crystal panel 10 and the backlight module 20 from entering the pointer hole B, thereby reducing the light leakage problem at the pointer hole B.

[0031] The inner light-shielding adhesive material 50 can be, but is not limited to, a light-shielding adhesive tape or a light-shielding foam. In this embodiment, the inner light-shielding adhesive material 50 is a black adhesive tape or a black foam.

[0032] The top of the outer wall 213 is bonded and fixed to the bottom surface (lower polarizer 15) of the liquid crystal panel 10 through the outer light-shielding adhesive material 40. The liquid crystal panel 10 and the backlight module 20 are bonded and fixed relative to each other through the inner light-shielding adhesive material 50 and the outer light-shielding adhesive material 40 to form an inner and outer light leakage prevention structure.

[0033] The outer light shielding adhesive material 40 can be, but is not limited to, a light shielding tape or a light shielding foam. In this embodiment, the outer light shielding adhesive material 40 is a black tape or a black foam.

[0034] If the backlight module 20 adopts a side-emitting structure, the light incident surface of the light guide plate 22 is its side surface, and the light strip 23 is arranged between the light guide plate 22 and the outer wall 213. If the backlight module 20 adopts a bottom-emitting structure, the light incident surface of the light guide plate 22 is its bottom surface, and the light strip 23 is arranged between the light guide plate 22 and the bottom plate 211.

[0035] If the backlight module 20 adopts a side-emitting structure, a reflective sheet 25 may be provided on the bottom surface of the light guide plate 22 and its light emitting surface to reflect the light emitted from the bottom surface of the light guide plate 22 back into the light guide plate 22 to improve light utilization.

[0036] In this embodiment, the light strip 23 is an LED light strip. Embodiment 2

[0037] As an optimization solution of the first embodiment, in this embodiment, if Figure 3As shown, the liquid crystal panel 10 is provided with a first light-shielding ink 60 or a first light-reflecting coating 60 on the inner wall at the pointer hole B, so as to perform light-shielding or reflection treatment on the inner walls of the upper substrate 12 and the lower substrate 14, so as to prevent the light in the liquid crystal panel 10 from being emitted into the pointer hole B after being refracted / scattered by the upper substrate 12 and the lower substrate 14, thereby further reducing the light leakage problem at the pointer hole B.

[0038] In this embodiment, the first light-shielding ink 60 is black ink, or the first light-reflecting coating 60 is a metal coating.

[0039] Preferably, the first light-shielding ink 60 or the first light-reflecting coating 60 extends to the inner walls of the backlight module 20 and the inner light-shielding adhesive material 50 . Embodiment 3

[0040] As an optimization solution of Embodiment 1 or Embodiment 2, in this embodiment, if Figure 4 As shown, the anti-light leakage drilling module further includes a pointer assembly 70 , and the pointer assembly 70 is disposed in the pointer hole B of the liquid crystal panel 10 and the backlight module 20 .

[0041] The pointer assembly 70 is provided with a second light-shielding ink 80 or a second light-reflecting coating 80 on the outer wall inside the pointer hole B, so as to perform light-shielding or reflection treatment on the outer wall of the pointer assembly 70, and absorb or reflect the light emitted from the inner wall of the liquid crystal panel 10 to the pointer hole B back into the liquid crystal panel 10, thereby further reducing the light leakage problem at the pointer hole B.

[0042] In this embodiment, the second light-shielding ink 80 is black ink, or the second light-reflecting coating 80 is a metal coating.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the utility model rather than to limit them. Although the embodiments of the utility model are described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the utility model can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A light leakage prevention drilling module, comprising a liquid crystal panel and a backlight module, wherein the liquid crystal panel and the backlight module are provided with a pointer hole penetrating along the thickness direction; the backlight module comprises a backlight frame and a light guide plate arranged in the backlight frame; characterized in that: The backlight frame includes a bottom plate, an inner wall and an outer wall. The inner wall is arranged on the bottom plate and surrounds the periphery of the pointer hole. The outer wall is arranged on the bottom plate and surrounds the periphery of the light guide plate. The top of the inner wall is bonded and fixed to the bottom surface of the liquid crystal panel by an inner shading adhesive.

2. The light leakage prevention drilling module according to claim 1, characterized in that: The inner light-shielding adhesive material is a light-shielding adhesive tape or a light-shielding foam.

3. The light leakage prevention drilling module according to claim 1, characterized in that: The top of the outer side wall is bonded to the bottom surface of the liquid crystal panel through an outer light-shielding adhesive material.

4. The light leakage prevention drilling module according to claim 3, characterized in that: The outer light-shielding adhesive material is a light-shielding adhesive tape or a light-shielding foam.

5. The light leakage prevention drilling module according to claim 1, characterized in that: The liquid crystal panel is provided with a first light-shielding ink or a first light-reflecting coating on the inner wall of the pointer hole.

6. The light leakage prevention drilling module according to claim 5, characterized in that: The first light-shielding ink is black ink, or the first light-reflecting coating is a metal coating.

7. The light leakage prevention drilling module according to claim 5, characterized in that: The first light-shielding ink or the first light-reflecting coating extends to the inner wall of the backlight module and the inner light-shielding adhesive material.

8. The light leakage prevention drilling module according to claim 1 or 5, characterized in that: The anti-light leakage drilling module also includes a pointer component, and the pointer component is arranged in the pointer holes of the liquid crystal panel and the backlight module.

9. The light leakage prevention drilling module according to claim 8, characterized in that: The pointer assembly is provided with a second light-shielding ink or a second light-reflecting coating on the outer wall in the pointer hole.

10. The light leakage prevention drilling module according to claim 9, characterized in that: The second light-shielding ink is black ink, or the second light-reflecting coating is a metal coating.

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