Reflector plate screen printing structure for improving light leakage of backlight punching area

Abstract

The utility model discloses a reflector plate silk-screen structure capable of improving light leakage of a backlight punching area, which comprises a fixed rubber frame, an upper brightness enhancement film, a lower brightness enhancement film, a diffusion film, a light guide plate, a reflector plate and a light shielding sheet, the upper bright enhancement film, the lower bright enhancement film, the diffusion film, the light guide plate and the reflector plate are all provided with through holes and are sequentially installed in the fixed rubber frame from left to right, black ink is printed on the edges of the through holes of the reflector plate in a silk-screen mode, and the anti-dazzling screen is installed on the left side of the fixed rubber frame. According to the reflector plate silk-screen structure for improving light leakage in the backlight punching area, a circle of black ink is printed on the through hole of the reflector plate through the black material in a silk-screen mode without changing the structure of the light guide plate and the structure of the reflector plate, light gathered at the edge of the light guide plate can be absorbed, light gathering at the through hole is avoided, light weakening caused by light gathering is avoided, and light leakage is reduced. Light leakage occurring in the VA area of the backlight module is improved, and the display effect of a picture is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of backlight sources, in particular to a reflective sheet screen printing structure for improving light leakage in the backlight punching area. Background Art

[0002] The backlight module is one of the key components of a liquid crystal display panel. The backlight module includes components such as an iron frame, a reflective film, a light guide plate, and LEDs. Since liquid crystals themselves do not emit light, an LED light source needs to be added at the bottom of the liquid crystal display panel. The LED light source is usually a linear light source. The function of the backlight module is to convert the linear light source emitted by the LED light source into a planar light source with uniform brightness, so that the liquid crystal display panel presents a full-color display effect.

[0003] In the process of continuously pursuing a large screen-to-body ratio for terminals, the concept of "full-screen" has been put forward. A full-screen means that there is no dedicated space on the front of the terminal for setting components such as a front camera and a receiver. Therefore, the "under-screen camera" has emerged. The so-called under-screen camera refers to setting the front camera under the screen. However, although the camera can be hidden under the screen, this will cause the backlight module corresponding to the camera on the display screen to need to be punched. When in use, light will be emitted from the side wall of the hole in the light guide plate. The emitted light is reflected by the side wall at the iron frame hole and then enters the light guide plate and the brightness enhancement film, and finally refracts out of the display module to form a light beam. As a result, the edge of the light guide plate in the hole area will become particularly bright due to the convergence of light, causing visible light in the VA area of the backlight module, not only resulting in light leakage problems but also affecting the display of the picture. Summary of the Utility Model

[0004] Based on this, in view of the above technical problems, it is necessary to provide a reflective sheet screen printing structure for improving light leakage in the backlight punching area. Without changing the structures of the light guide plate and the reflective sheet, a circle of black ink is screen printed with a black material at the position of the through hole of the reflective sheet. In this way, although light will be emitted from the side wall of the through hole of the light guide plate during use, the black ink at the through hole of the reflective sheet can absorb the light gathered at the edge of the light guide plate at this time, thereby avoiding the convergence of light at the through hole, weakening the light, improving the light leakage phenomenon in the VA area of the backlight module, and enhancing the display effect of the picture.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A reflective sheet screen printing structure for improving light leakage in the backlight punching area, comprising:

[0007] A fixing glue frame, an upper brightness enhancement film, a lower brightness enhancement film, a diffusion film, a light guide plate, a reflective sheet and a light-shielding sheet. The fixing glue frame is provided with a protrusion and formed with a mounting hole. Through holes are formed on the upper brightness enhancement film, the lower brightness enhancement film, the diffusion film, the light guide plate and the reflective sheet, and they are sequentially installed inside the fixing glue frame from left to right. Black ink is screen-printed on the edge of the through hole of the reflective sheet. The light-shielding sheet is installed on the left side of the fixing glue frame.

[0008] Further, the black ink is screen-printed on the side of the reflective sheet close to the light guide plate.

[0009] Further, the thickness of the black ink is 0.008 mm - 0.012 mm.

[0010] Further, the width of the black ink is 0.3 mm - 0.7 mm.

[0011] Further, the through hole is adapted to the size of the protrusion. The inner diameter of the black ink is 3.8 mm, and the outer diameter of the black ink is 4.3 mm.

[0012] Further, the fixing glue frame is a metal frame, a glue frame or a combined frame of a metal frame and a glue frame.

[0013] Further, an opaque member for further preventing light leakage is provided on the outer side of the protrusion.

[0014] Further, the opaque member is cylindrical and sleeved on the outer surface of the protrusion, and the through hole is adapted to the size of the opaque member.

[0015] Further, the opaque member is a black adhesive tape, and the black adhesive tape is pasted on the outer surface of the protrusion.

[0016] Further, the thickness of the opaque member is 0.08 mm - 0.12 mm.

[0017] Compared with the prior art, the present utility model has the following beneficial effects:

[0018] The reflective sheet screen-printing structure for improving light leakage in the backlight punching area provided by the present utility model is provided with an opaque member on the outer side of the protrusion of the fixing glue frame, and the opaque member is black and has a light absorption effect. In this way, although light will be emitted from the side wall of the through hole of the light guide plate during use, the light irradiated on the opaque member can also be absorbed, thereby reducing light reflection, avoiding the convergence of light at the through hole, making the light weaker, and further improving the display effect of the picture.

[0019] The reflective sheet screen printing structure for improving light leakage in the backlight punching area provided by the present utility model, without changing the structures of the light guide plate and the reflective sheet, silk-screens a circle of black ink with a black material at the position of the through holes of the reflective sheet. In this way, although light rays will emit from the side walls of the through holes of the light guide plate during use, the black ink at the through holes of the reflective sheet can absorb the light rays gathered at the edges of the light guide plate at this time, thereby avoiding the convergence of light rays at the through holes, weakening the light rays, improving the light leakage phenomenon occurring in the VA area of the backlight module, and enhancing the display effect of the picture. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. 6 is a left view structural schematic diagram of the reflective sheet screen printing structure for improving light leakage in the backlight punching area provided by the present utility model;

[0021] Figure 2 FIG. 10 is a front view sectional schematic diagram of the reflective sheet screen printing structure for improving light leakage in the backlight punching area provided by the present utility model;

[0022] Figure 3 For the reflective sheet screen printing structure for improving light leakage in the backlight punching area provided by the present utility model Figure 2 The enlarged schematic diagram at A in FIG. 16;

[0023] Figure 4 FIG. 20 is a structural schematic diagram of the reflective sheet of the reflective sheet screen printing structure for improving light leakage in the backlight punching area provided by the present utility model;

[0024] Figure 5 FIG. 24 is a structural schematic diagram of Embodiment 4 of the reflective sheet screen printing structure for improving light leakage in the backlight punching area provided by the present utility model.

[0025] The markings in the figures are explained as follows:

[0026] 1, fixing rubber frame; 2, protruding part; 3, mounting hole; 4, upper brightness enhancement film; 5, lower brightness enhancement film; 6, diffusion film; 7, light guide plate; 8, reflective sheet; 9, through hole; 10, black ink; 11, light-shielding sheet; 12, light-impermeable member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0028] As described in the background art, in order to achieve a full-screen display, existing display screens need to be provided with holes corresponding to the camera on the backlight module. When in use, light will be emitted from the side walls of the holes in the light guide plate within the backlight module. As a result, the edge of the light guide plate in the hole area will become particularly bright due to the convergence of light, causing visible light to appear in the VA area of the backlight module, not only resulting in light leakage problems but also affecting the display of the picture.

[0029] To solve this technical problem, the present utility model provides a reflective sheet silk-screen printing structure for improving light leakage in the backlight punching area. By silk-screen printing a circle of black ink 10 with a black material at the position of the through-hole 9 of the reflective sheet 8, although light will be emitted from the side walls of the through-hole 9 of the light guide plate 7 during use, the black ink 10 at the through-hole 9 of the reflective sheet 8 can absorb the light gathered at the edge of the light guide plate 7 at this time, thereby avoiding the convergence of light at the through-hole 9, weakening the light, and improving the light leakage phenomenon occurring in the VA area of the backlight module.

[0030] Specifically, please refer to Figures 1-4 , the reflective sheet silk-screen printing structure for improving light leakage in the backlight punching area specifically includes:

[0031] A fixing rubber frame 1, on which a protruding portion 2 is provided and an installation hole 3 is formed;

[0032] An upper brightness enhancement film 4, a lower brightness enhancement film 5, a diffusion film 6, a light guide plate 7, and a reflective sheet 8. Through-holes 9 are provided on the upper brightness enhancement film 4, the lower brightness enhancement film 5, the diffusion film 6, the light guide plate 7, and the reflective sheet 8, and they are sequentially installed inside the fixing rubber frame 1 from left to right. A black ink 10 is silk-screen printed on the edge of the through-hole 9 of the reflective sheet 8. Specifically, the upper brightness enhancement film 4, the lower brightness enhancement film 5, and the diffusion film 6 can form an optical film material or can also be referred to as a light homogenizing element. Through-holes 9 are provided on the upper brightness enhancement film 4, the lower brightness enhancement film 5, and the diffusion film to make way for the protruding portion 2 provided on the fixing rubber frame 1, facilitating stacked installation;

[0033] A light-shielding sheet 11, which is installed on the left side of the fixing rubber frame 1.

[0034] The reflective sheet silk-screening structure for improving light leakage in the backlight punching area provided by the present utility model, without changing the structures of the light guide plate 7 and the reflective sheet 8, silk-screens a circle of black ink 10 with black material at the position of the through hole 9 of the reflective sheet 8. Since a light source is arranged inside the fixing rubber frame 1, and the light source consists of many dot light sources to form a surface light source. After being reflected by the reflective sheet 8, the light source will enter the light guide plate 7. According to the optical principle, when light propagates from one medium to another, refraction, reflection, and scattering phenomena will occur. Thus, although light will emit from the side wall of the through hole 9 of the light guide plate 7 during use, at this time, the black ink 10 at the through hole 9 of the reflective sheet 8 can absorb the light gathered at the edge of the light guide plate 7, thereby avoiding the convergence of light at the through hole 9, weakening the light, improving the light leakage phenomenon in the VA area of the backlight module, and enhancing the display effect of the picture;

[0035] The light source arranged inside the fixing rubber frame 1 is not shown in the figure. According to different emission colors, it may include a white light LED backlight source and an RGB-LED backlight source. Among them, the white light LED backlight source has low power consumption, and the RGB-LED backlight source can effectively improve the contrast of the display, achieve more accurate color gradations and a picture with stronger sense of hierarchy, and make the display lighter in mass and thinner in thickness.

[0036] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

[0037] It should be noted that, without conflict, the embodiments in the present utility model and the features and technical solutions in the embodiments may be combined with each other.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0039] Please refer to Figures 1-4 , a reflective sheet silk-screening structure for improving light leakage in the backlight punching area, which includes a fixing rubber frame 1. A protruding portion 2 is provided on the fixing rubber frame 1 and an installation hole 3 is formed;

[0040] An upper brightness enhancement film 4, a lower brightness enhancement film 5, a diffusion film 6, a light guide plate 7, and a reflective sheet 8. Through holes 9 are opened on the upper brightness enhancement film 4, the lower brightness enhancement film 5, the diffusion film 6, the light guide plate 7, and the reflective sheet 8, and they are sequentially installed inside the fixing rubber frame 1 from left to right. Black ink 10 is silk-screened on the edge of the through hole 9 of the reflective sheet 8. Specifically, the upper brightness enhancement film 4, the lower brightness enhancement film 5, and the diffusion film 6 can form an optical film material, which can also be called a light homogenizing element. Through holes 9 are opened on the upper brightness enhancement film 4, the lower brightness enhancement film 5, and the diffusion film to make way for the protruding portion 2 provided on the fixing rubber frame 1, facilitating stacked installation;

[0041] The light-shielding sheet 11 is installed on the left side of the fixed rubber frame 1.

[0042] The reflective sheet silk-screen printing structure for improving light leakage in the backlight punching area provided in this embodiment is to silk-screen a circle of black ink 10 with a black material at the position of the through hole 9 of the reflective sheet 8. In this way, although light will emit from the side wall of the through hole 9 of the light guide plate 7 during use, the black ink 10 at the through hole 9 of the reflective sheet 8 can absorb the light gathered at the edge of the light guide plate 7 at this time, thereby avoiding the convergence of light at the through hole 9, weakening the light, and improving the light leakage phenomenon occurring in the VA area of the backlight module.

[0043] Further optimize the reflective sheet silk-screen printing structure for improving light leakage in the backlight punching area provided in Embodiment 1. Specifically, the black ink 10 is silk-screened on the side of the reflective sheet 8 close to the light guide plate 7. The thickness of the black ink 10 is 0.008 mm - 0.012 mm, and the width of the black ink 10 is 0.3 mm - 0.7 mm.

[0044] For the above structural design, preferably, the thickness of the black ink 10 is 0.01 mm, and the width of the black ink 10 is 0.5 mm. By not changing the structures of the light guide plate 7 and the reflective sheet 8, a circle of black ink 10 is silk-screened with a black material at the position of the through hole 9 of the reflective sheet 8. Since a light source is arranged inside the fixed rubber frame 1, and the light source consists of many dot light sources to form a surface light source. After the light source is reflected by the reflective sheet 8, it will enter the light guide plate 7. According to the optical principle, when light propagates from one medium to another, refraction, reflection, and scattering phenomena will occur. In this way, although light will emit from the side wall of the through hole 9 of the light guide plate 7 during use, the black ink 10 at the through hole 9 of the reflective sheet 8 can absorb the light gathered at the edge of the light guide plate 7 at this time, thereby avoiding the convergence of light at the through hole 9, weakening the light, improving the light leakage phenomenon occurring in the VA area of the backlight module, and improving the display effect of the picture.

[0045] Further optimize the reflective sheet silk-screen printing structure for improving light leakage in the backlight punching area provided in Embodiment 1 or 2, such as Figures 1-4 As shown, the through hole 9 is adapted to the size of the protrusion 2. The inner diameter of the black ink 10 is 3.8 mm, and the outer diameter of the black ink 10 is 4.3 mm. The fixed rubber frame 1 is a metal frame, a rubber frame, or a combined frame of a metal frame and a rubber frame.

[0046] By setting the size of the black ink 10 in this way, it is more appropriate and the black ink 10 will not be wasted. It can ensure that after the reflective sheet 8 is sleeved on the protrusion 2 of the fixed rubber frame 1, the black ink 10 has a good light absorption effect.

[0047] Further optimize the reflective sheet silk-screen printing structure for improving light leakage in the backlight punching area provided in the above embodiments, such as Figure 4As shown, an opaque member 12 for further preventing light leakage is provided on the outer side of the protrusion 2. The opaque member 12 is cylindrical and sleeved on the outer surface of the protrusion 2. The through hole 9 is adapted to the size of the opaque member 12. The opaque member 12 is a black adhesive tape, and the black adhesive tape is pasted on the outer surface of the protrusion 2. The thickness of the opaque member 12 is 0.08 mm - 0.12 mm.

[0048] With such a structural design, an opaque member 12 is provided on the outer side of the protrusion 2 of the fixed rubber frame 1, and the opaque member is black and has a light absorption function. In this way, although light will be emitted from the side wall of the through hole 9 of the light guide plate 7 during use, the light irradiated on the opaque member 12 can also be absorbed at this time, thereby reducing light reflection.

[0049] The use process of the reflective sheet screen printing structure for improving light leakage in the backlight punching area provided by the present utility model is as follows:

[0050] Without changing the structures of the light guide plate 7 and the reflective sheet 8, a circle of black ink 10 is screen printed with a black material at the position of the through hole 9 of the reflective sheet 8. Since a light source is provided inside the fixed rubber frame 1, and the light source consists of many dot light sources to form a surface light source, the light source will enter the light guide plate 7 after being reflected by the reflective sheet 8. According to the optical principle, when light propagates from one medium to another, refraction, reflection, and scattering phenomena will occur. In this way, although light will be emitted from the side wall of the through hole 9 of the light guide plate 7 during use, the black ink 10 at the through hole 9 of the reflective sheet 8 can absorb the light gathered at the edge of the light guide plate 7 at this time, thereby avoiding the convergence of light at the through hole 9, weakening the light, improving the light leakage phenomenon in the VA area of the backlight module, and improving the display effect of the picture. By providing an opaque member 12 on the outer side of the protrusion 2 of the fixed rubber frame 1, and the opaque member is black and has a light absorption function, although light will be emitted from the side wall of the through hole 9 of the light guide plate 7 during use, the light irradiated on the opaque member 12 can also be absorbed at this time, thereby reducing light reflection, avoiding the convergence of light at the through hole 9, making the light weaker, and further improving the display effect of the picture.

[0051] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0052] Obviously, the embodiments described above are only a part of the embodiments of the present utility model, rather than all of them. The preferred embodiments of the present utility model are shown in the accompanying drawings, but they do not limit the scope of the patent of the present utility model. The present utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacements on some of the technical features. Any equivalent structures directly or indirectly using the content of the specification and drawings of the present utility model in other related technical fields shall be within the scope of the patent protection of the present utility model by the same token.

Claims

1. A reflective sheet screen printing structure for improving light leakage in the backlight punching area, characterized in that It includes: A fixed glue frame (1), on which a protruding part (2) is provided and a mounting hole (3) is formed; An upper brightness enhancement film (4), a lower brightness enhancement film (5), a diffusion film (6), a light guide plate (7) and a reflector (8). Through holes (9) are formed in the upper brightness enhancement film (4), the lower brightness enhancement film (5), the diffusion film (6), the light guide plate (7) and the reflector (8), and they are sequentially installed inside the fixed glue frame (1) from left to right. Black ink (10) is screen-printed on the edge of the through hole (9) of the reflector (8); A light-shielding sheet (11), which is installed on the left side of the fixed glue frame (1).

2. The reflective sheet screen printing structure for improving light leakage in the backlight punching area according to claim 1, wherein, The black ink (10) is screen-printed on the side of the reflector (8) close to the light guide plate (7).

3. The reflective sheet screen printing structure for improving light leakage in the backlight punching area according to claim 2, wherein, The thickness of the black ink (10) is 0.008 mm - 0.012 mm.

4. The reflective sheet screen printing structure for improving light leakage in the backlight punching area according to claim 3, characterized in that, The width of the black ink (10) is 0.3 mm - 0.7 mm.

5. The reflective sheet screen printing structure for improving light leakage in the backlight punching area according to claim 4, wherein The through hole (9) is adapted to the size of the protruding part (2). The inner diameter of the black ink (10) is 3.8 mm, and the outer diameter of the black ink (10) is 4.3 mm.

6. The reflective sheet screen printing structure for improving light leakage in the backlight punching area according to claim 5, wherein The fixed glue frame (1) is a metal frame, a glue frame or a combined frame of a metal frame and a glue frame.

7. The reflective sheet screen printing structure for improving light leakage in the backlight punching area according to claim 6, wherein An opaque member (12) for further preventing light leakage is provided on the outer side of the protruding part (2).

8. The reflective sheet screen printing structure for improving light leakage in the backlight punching area according to claim 7, characterized in that, The opaque member (12) is cylindrical and sleeved on the outer surface of the protruding part (2), and the through hole (9) is adapted to the size of the opaque member (12).

9. The reflective sheet screen printing structure for improving light leakage in the backlight punching area according to claim 8, wherein, The opaque member (12) is a black adhesive tape, which is pasted on the outer surface of the protruding part (2).

10. The reflective sheet screen printing structure for improving light leakage in the backlight punching area according to claim 9, characterized in that The thickness of the opaque member (12) is 0.08 mm - 0.12 mm.

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