Ultra-narrow frame backlight structure of display screen

Abstract

An ultra-narrow frame backlight structure of a display screen mainly comprises a back plate, a heat-conducting double-faced adhesive tape, a light bar, a reflector plate double-faced adhesive tape, a reflector plate, an L-shaped silica gel limiting pad, a light guide plate, a diaphragm double-faced adhesive tape, an optical diaphragm and a middle frame. The back plate is locally provided with back plate material extruding steps and back plate L-shaped silica gel limiting pad protruding point positioning holes, and the upper side of the light guide plate is provided with light guide plate upper side membrane positioning protruding points. The backboard is not provided with an optical film positioning structure, the width, needing to be shielded by the frame, of the positioning structure can be reduced due to the fact that the film positioning structure is omitted, the backboard can make a backboard thickness space for a telescopic space where the optical film is affected by heating, and the optical film needs enough film pressing distance to prevent the optical film from jumping out of the middle frame; l-shaped silica gel limiting pad salient point positioning holes are locally designed in the back plate and are used for pre-fixing the L-shaped silica gel limiting pads, and in addition, back plate extrusion steps are locally designed on the back plate; the upper side of the light guide plate is provided with diaphragm positioning salient points, so that the frame width of the shielding diaphragm positioning structure is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of display screens, in particular to an ultra-narrow frame backlight structure of a display screen. Background Art

[0002] Display screens are currently widely used electronic display devices, such as in-vehicle instruments, mobile phones, computers, televisions, billboards, industrial control, medical equipment, and aerospace, etc., allowing us to clearly see images and texts and conveying various information to us. With the development of the display industry, electronicization, new energy, lightweight, multi-screen, ultra-thin and ultra-narrow borders have become new development trends in the display industry, especially the increasing demand for LCD screen displays, and the related thin and light structures, ultra-thin and ultra-narrow border designs are also increasingly demanded.

[0003] With the rapid development of the display industry, the thickness of display screens is required to be thinner and thinner, and the borders are required to be narrower and narrower. The thinner and narrower the product is, the more space the display screen saves. The demand for thin and light ultra-narrow border display screens in various fields has increased significantly. Summary of the invention

[0004] In order to solve the technical problem of the ultra-narrow bezel of the above-mentioned display screen, the utility model provides a structure of an ultra-narrow bezel backlight, which can reduce the width of the bezels around the non-display area, narrow the bezel of the entire structure, and combine with the existing OCA bonding technology to achieve the problem of product thinning structure and meet the market demand for ultra-thin and ultra-narrow bezel design.

[0005] The utility model solves the technical problem by adopting the following technical solutions:

[0006] An ultra-narrow frame backlight structure of a display screen mainly includes a back plate, a heat-conducting double-sided adhesive tape, a light bar, a reflective sheet double-sided adhesive tape, a reflective sheet, an L-shaped silicone limit pad, a light guide plate, a diaphragm double-sided adhesive tape, an optical diaphragm and a middle frame. The back plate is partially designed with a back plate extrusion step and a back plate L-shaped silicone limit pad convex point positioning hole, and the upper side of the light guide plate is designed with a light guide plate upper side diaphragm positioning convex point.

[0007] Furthermore, the back plate is formed by bending the plate around to form a bent edge with a certain height, and the bent edges around and the bottom plate form a containing cavity.

[0008] Furthermore, the light strip is adhered to the side of the back panel by means of a heat-conductive double-sided adhesive.

[0009] Furthermore, the reflector is fixed to the back plate by double-sided adhesive tape, and has bent edges around it for limiting.

[0010] Furthermore, the L-shaped silicone limiting pad is pre-fixed at two upper corners of the back panel accommodating cavity through its own positioning protrusions and the L-shaped silicone limiting pad fixing holes on the back panel.

[0011] Furthermore, the light guide plate is fixed in the back plate by contacting the two lower corner end faces of the assembled light bar and compressing and interfering with the two upper corner L-shaped silicone limit pads.

[0012] Depending on the specific implementation scheme, there may be no L-shaped silicone limiting pad. When there is no L-shaped silicone limiting pad, the light guide plate is fixed on the assembled reflective sheet through the tight fit between the positioning protrusions on the lower side of the light guide plate and the light guide plate protrusion positioning holes on the back panel.

[0013] Furthermore, the optical film is fixed on the assembled light guide plate by means of the double-sided adhesive tape of the film and the film positioning protrusions on the upper side of the light guide plate.

[0014] According to the brightness requirement, multiple optical films can be fixed on the optical film by using the film fixing double-sided tape.

[0015] Furthermore, the middle frame is assembled into a backlight assembly by cooperating with the convex structure of the back plate through its own hooks.

[0016] The backlight assembly is then embedded in various fields of application to become the backlight part of an electronic display device.

[0017] As another alternative technical solution of the utility model,

[0018] An ultra-narrow frame backlight structure of a display screen mainly includes a back plate, a heat-conducting double-sided adhesive tape, a light bar, a reflective sheet double-sided adhesive tape, a reflective sheet, an L-shaped silicone limit pad, a light guide plate, a diaphragm double-sided adhesive tape, an optical diaphragm and a middle frame. The back plate is partially designed with a light guide plate convex point positioning hole, the upper side of the light guide plate is designed with a light guide plate upper side diaphragm positioning convex point, and the lower side of the light guide plate is designed with a light guide plate positioning convex point.

[0019] Compared with the prior art, the technical advantages and beneficial effects of the preferred solution of the utility model are as follows:

[0020] The preferred solution adopts a back plate with an unconventional design, and the back plate has no optical film positioning structure. Eliminating the film positioning structure can reduce the width of the positioning structure that needs to be shielded by the frame;

[0021] The back panel design allows space for the thickness of the back panel to provide space for the optical film to expand and contract due to heat. To prevent the optical film from jumping out of the middle frame, sufficient lamination distance is required. This design achieves the lamination distance of the thickness of the back panel on one side.

[0022] The back panel is partially designed with L-shaped silicone limit pad convex positioning holes for pre-fixing the L-shaped silicone limit pad. In addition, the back panel is partially designed with a back panel extrusion step. The anti-shaking and noise design of the light guide plate requires a silicone limit pad of sufficient thickness to limit the position. The back panel extrusion step can gain space for the silicone limit pad to squeeze the thickness of the material, which can increase the compressibility of the silicone limit pad.

[0023] The preferred solution uses an unconventional injection-molded light guide plate with diaphragm positioning bumps on the upper side of the light guide plate, which reduces the width of the frame that shields the diaphragm positioning structure. Through the above differentiated structural design, the width of the frame around the non-display area can be reduced to meet the design requirements of ultra-narrow frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the structure of the utility model and constitute a part of the specification. Together with the following specific implementation methods, they are used to explain the utility model, but do not constitute a limitation to the utility model.

[0025] Figure 1 This is a structural diagram of the utility model after the backlight is assembled.

[0026] Figure 2 It is an exploded view of the components of the backlight of the utility model.

[0027] Figure 3 This is a diagram of the backplane structure provided in Example 1 of the utility model.

[0028] Figure 4 This is a structural diagram of a light guide plate provided in Embodiment 1 of the present utility model.

[0029] Figure 5 This is a backplane structure diagram provided in Example 2 of the utility model.

[0030] Figure 6 This is a structural diagram of a light guide plate provided in the second embodiment of the present utility model.

[0031] The reference numerals are as follows: 1. back panel, 2. double-sided heat-conducting adhesive tape, 3. light bar, 4. double-sided adhesive tape for reflective sheet, 5. reflective sheet, 6. light guide plate, 7. double-sided adhesive tape for film, 8. optical film, 9. middle frame, 10. L-shaped silicone limit pad. 1-1. back panel extrusion step, 1-2. L-shaped silicone limit pad convex positioning hole for back panel, 1-3. convex positioning hole for lower side of light guide plate on back panel, 6-1. convex positioning point for film on upper side of light guide plate, 6-2. convex positioning point for lower side of light guide plate. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the examples of the utility model to clearly and completely describe the technical structure scheme in the embodiment of the utility model. The described embodiment is only a part of the embodiment of the structure of the utility model, not all embodiments. The additional technical features and advantages of the utility model will be more clearly explained in the following description, or can be understood through the specific practice of the utility model. Embodiment 1

[0033] like Figure 1 and 2As shown, the utility model is mainly composed of 10 main parts, and the direct position, connection and functional relationship of each part are as follows:

[0034] The back panel 1 and the light bar 3 are fixed by thermal double-sided adhesive tape 2. The back panel 1 and the reflector 5 are fixed by reflector double-sided adhesive tape 4. The L-shaped silicone limit pad 10 is assembled close to the lower step surface of the back panel extrusion step 1-1 on the back panel 1, and then pre-fixed by the convex point structure of the L-shaped silicone limit pad 10 and the L-shaped silicone limit pad positioning hole 1-2 of the back panel 1. The light guide plate 6 is fixed in the back panel 1 by the two lower corner end faces of the light bar 3 and the two upper corner L-shaped silicone limit pads 10 through compression interference fit. The optical film 8 is fixed on the light guide plate 6 by the film double-sided adhesive tape 7 and the upper film positioning convex point 6-1 of the light guide plate 6. According to the brightness requirements, multiple optical films can be fixed on the optical film 8 by the film double-sided adhesive tape 7. The middle frame 9 is assembled into a backlight component by its own hook and the convex structure of the back panel 1. The backlight component is then embedded in various fields of application to become the backlight part of the electronic display device.

[0035] The assembly process of embodiment 1 is as follows:

[0036] refer to Figure 3 and Figure 4 The light strip 3 is fixed to the side of the back panel 1 with a heat-conducting double-sided adhesive 2, the reflector 5 is fixed to the front of the back panel 1 with a reflector double-sided adhesive 4, the light guide plate 6 is fixed in the back panel 1 by contacting the two lower corner end faces of the light strip 3 and compressing and interfering with the two upper corner L-shaped silicone limit pads 10, the optical film 8 is fixed to the light guide plate 6 by the film double-sided adhesive 7 and the upper side film positioning convex point 6-1 of the light guide plate 6, and the middle frame 9 is assembled into a backlight component by cooperating with the convex structure of the back panel 1 through its own hooks.

[0037] Embodiment 1 adopts an unconventionally designed back panel, which has no optical film positioning structure. Canceling the film positioning structure can reduce the width of the positioning structure that needs to be shielded by the frame; the back panel design can allow space in the thickness of the back panel material for the expansion and contraction space of the optical film affected by heat. Sufficient film pressing distance is required to prevent the optical film from jumping out of the middle frame. This design has unilaterally achieved the film pressing distance of the thickness of the back panel material; the back panel is partially designed with an L-shaped silicone limit pad convex positioning hole for pre-fixing the L-shaped silicone limit pad, and the back panel is partially designed with a back panel extrusion step. The anti-shaking and abnormal sound design of the light guide plate requires a silicone limit pad of sufficient thickness to limit the position. The back panel design extrusion step can gain thickness space for the silicone limit pad, and can increase the compressibility of the silicone limit pad.

[0038] The first embodiment adopts an injection-molded light guide plate of unconventional design. The upper side of the light guide plate is designed with diaphragm positioning bumps, which reduces the width of the frame that shields the diaphragm positioning structure. Embodiment 2

[0039] like Figure 1 and 2 As shown, the utility model is mainly composed of 9 main parts, and the positions, connections and functional relationships of each part are as follows: the back panel 1 and the light bar 3 are pasted and fixed by using the heat-conducting double-sided adhesive tape 2. The back panel 1 and the reflector 5 are pasted and fixed by using the reflector double-sided adhesive tape 4. The light guide plate 6 is fixed in the back panel 1 by a tight fit through the positioning protrusions 6-2 on the lower side of the light guide plate and the positioning holes 1-3 on the lower side of the light guide plate on the back panel. The optical film 8 is fixed to the light guide plate 6 by the film double-sided adhesive tape 7 and the upper film positioning protrusions 6-1 of the light guide plate 6. According to the brightness requirements, multiple optical films can be fixed on the optical film 8 by the film double-sided adhesive tape 7. The middle frame 9 is assembled into a backlight assembly by its own hook and the convex structure of the back panel 1. The backlight assembly is then embedded in various fields of application to become the backlight part of the electronic display device.

[0040] The assembly process of the second embodiment is as follows:

[0041] refer to Figure 5 and Figure 6 The light strip 3 is fixed to the side of the back panel 1 by using a heat-conducting double-sided adhesive tape 2, the reflective sheet 5 is fixed to the front of the back panel 1 by using a reflective sheet double-sided adhesive tape 4, the light guide plate 6 is fixed to the back panel 1 by using the positioning protrusions 6-2 on the lower side of the light guide plate and the light guide plate protrusion positioning holes 1-3 on the back panel, the optical film 8 is fixed to the light guide plate 6 by using the film double-sided adhesive tape 7 and the film positioning protrusions 6-1 on the upper side of the light guide plate 6, and the middle frame 9 is assembled into a backlight component by using its own hooks to cooperate with the convex structure of the back panel 1.

[0042] Embodiment 2 adopts an unconventionally designed backplane, which has no optical film positioning structure. Canceling the film positioning structure can reduce the width of the positioning structure that needs to be shielded by the frame; the backplane design can allow space in the thickness of the backplane plate to provide expansion and contraction space for the optical film affected by heat. To prevent the optical film from jumping out of the middle frame, sufficient lamination distance is required. This design unilaterally strives for the lamination distance of the thickness of the backplane plate; the backplane is partially designed with light guide plate convex positioning holes, and the light guide plate anti-shake and abnormal sound design requires that the movable gap of the light guide plate be as small as possible. The light guide plate convex positioning holes and the light guide plate convex points on this backplane are designed with a tight fit gap.

[0043] Embodiment 2 adopts an unconventionally designed injection-molded light guide plate, wherein the upper side of the light guide plate is designed with diaphragm positioning protrusions, which reduces the frame width of the shielding positioning structure; the lower side of the light guide plate is designed with light guide plate positioning protrusions, and the light guide plate protrusion positioning holes on the back panel are designed with a tight fit clearance.

[0044] To sum up, there are two schemes for the specific implementation of the utility model, mainly with or without an L-shaped silicone limit pad, matching the design of the corresponding back panel and light guide plate, and reducing the width of the border around the non-display area through differentiated structural design to meet the design requirements of ultra-narrow borders, saving space for installation requirements, and making the product lighter and thinner, with a better appearance.

Claims

1. An ultra-narrow frame backlight structure of a display screen, mainly comprising a back plate, a heat-conducting double-sided adhesive tape, a light bar, a reflective sheet double-sided adhesive tape, a reflective sheet, an L-shaped silicone limit pad, a light guide plate, a diaphragm double-sided adhesive tape, an optical diaphragm and a middle frame, characterized in that: The back panel is partially designed with a back panel extrusion step and a back panel L-shaped silicone limit pad convex positioning hole, and the upper side of the light guide plate is designed with a light guide plate upper side membrane positioning convex point.

2. The ultra-narrow frame backlight structure of a display screen according to claim 1, characterized in that: The back plate is formed by bending the plate around to form a bending edge with a certain height, and the bending edges around and the bottom plate form a containing cavity.

3. The ultra-narrow frame backlight structure of a display screen according to claim 1, characterized in that: The light strip is adhered to the side of the back plate by means of a heat-conducting double-sided adhesive.

4. The ultra-narrow frame backlight structure of a display screen according to claim 1, characterized in that: The reflector is fixed on the back plate by double-sided adhesive tape, and has bent edges for limiting positions around it.

5. The ultra-narrow frame backlight structure of a display screen according to claim 1, characterized in that: The L-shaped silicone limit pad is pre-fixed at two upper corners of the back panel accommodating cavity through its own positioning protrusions and the L-shaped silicone limit pad fixing holes on the back panel.

6. The ultra-narrow frame backlight structure of a display screen according to claim 1, characterized in that: The light guide plate is fixed in the back plate by contacting the two lower corner end faces of the assembled light bar and compressing and interfering with the two upper corner L-shaped silicone limit pads.

7. The ultra-narrow frame backlight structure of a display screen according to claim 1, characterized in that: The optical film is fixed on the assembled light guide plate by means of the double-sided adhesive tape of the film and the film positioning convex points on the upper side of the light guide plate.

8. The ultra-narrow frame backlight structure of a display screen according to claim 1, characterized in that: The middle frame is assembled into a backlight assembly by cooperating with the convex structure of the back plate through its own hooks.

9. The ultra-narrow frame backlight structure of a display screen according to claim 8, characterized in that: The backlight assembly is then embedded in various fields of application to become the backlight part of an electronic display device.

10. An ultra-narrow frame backlight structure of a display screen, mainly comprising a back plate, a heat-conducting double-sided adhesive tape, a light bar, a reflective sheet double-sided adhesive tape, a reflective sheet, an L-shaped silicone limit pad, a light guide plate, a diaphragm double-sided adhesive tape, an optical diaphragm and a middle frame, characterized in that: The back plate is partially designed with a light guide plate convex positioning hole, the upper side of the light guide plate is designed with a light guide plate upper side film positioning convex point, and the lower side of the light guide plate is designed with a light guide plate positioning convex point.

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