Integrated touch display module capable of preventing light leakage

Abstract

The utility model discloses an integrated touch control display module capable of preventing light leakage, which comprises a liquid crystal display screen and a backlight structure, the liquid crystal display screen comprises a lower polaroid, a PVA (polyvinyl alcohol) polarizing layer is arranged in the lower polaroid, and a polarizing material removing area is arranged on the PVA polarizing layer; a camera hole is formed in the backlight structure, and the polarized light material removing area corresponds to the area of the camera hole; the backlight structure comprises a supporting frame and a camera hole shading adhesive layer, the camera hole is formed in the supporting frame, a supporting protruding part is arranged on the supporting frame, one side face of the camera hole shading adhesive layer is attached to the supporting protruding part, and the other side face of the camera hole shading adhesive layer is attached to the lower polaroid. In this way, the pasting area between the camera hole shading adhesive layer and the lower polaroid can be increased, and light leakage caused by separation is avoided; meanwhile, the supporting protruding part is additionally arranged at the position, corresponding to the camera hole, of the supporting frame, the pasting area between the camera hole shading adhesive layer and the supporting frame is increased through the supporting protruding part, and separation and light leakage are avoided. And meanwhile, a dispensing process is omitted.

Description

Technical Field

[0001] The utility model relates to the technical field of touch display modules, in particular to an integrated touch display module that prevents light leakage. Background Art

[0002] In integrated touch display modules, polarizers are usually used to ensure the display effect of the display module. Polarizers are a sheet of optical functional materials that generate and detect polarized light. Their main function is to convert natural light into polarized light. Figure 1 As shown in the figure, it is a basic structure diagram of a polarizer, including TAC layer 10a, PVA layer 10b, TAC layer 10c and PSA layer 10d stacked in sequence. Among them, PVA (polyvinyl alcohol) layer 10b is the core part of the polarizer, which does not have high transmittance, while TAC layer 10b and (triacetate cellulose film) are protective materials for PVA layer 10b, and PSA adhesive layer (pressure sensitive adhesive) is used for bonding the polarizer and liquid crystal glass, and both have high transmittance. Please refer to Figure 2 The figure shows the structure of an integrated touch display module with a blind hole for installing a camera. The camera hole area corresponding to the upper polarizer 20a and the lower polarizer 20b needs to be opened to avoid affecting the imaging effect of the camera. However, the structure of an integrated touch display module with a lower polarizer opening has the following problems:

[0003] The opening of the lower polaroid will cause the light-shielding glue 20c on the backlight structure to be pasted to the lower polaroid 20b and the iron frame 20e at the backlight opening with a small area, which will cause the light-shielding glue 20c to be easily warped, and it is easy to separate during transportation or vibration, resulting in a gap between the two, so that the light in the backlight structure leaks out to the vicinity of the camera hole, affecting the use of the camera. In addition, in order to prevent the light source from leaking out from between the light-shielding glue 20c and the iron frame 20e and the light source from leaking out from the edge of the opening of the lower polaroid 20b, it is necessary to dispense glue 20d at the edge of the opening of the lower polaroid 20b and dispense glue 20d on the side of the backlight opening. However, this solution requires the purchase of glue dispensing equipment, which increases the production process and cost accordingly, and the glue dispensing process is complicated, affecting production efficiency and yield. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide an integrated touch display module that is light-leakage-proof and does not require glue to be dispensed in the camera blind hole area, thereby reducing a glue dispensing process and further improving production efficiency and yield rate.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A light leakage-proof integrated touch display module comprises: a liquid crystal display screen and a backlight structure, wherein the liquid crystal display screen comprises an upper polarizer, an upper glass, a lower glass and a lower polarizer which are stacked in sequence from top to bottom, a PVA polarizing layer is arranged in the lower polarizer, a polarizing material layer is formed on the PVA polarizing layer, and a polarizing material removal area is arranged in the PVA polarizing layer; a camera hole is opened on the backlight structure, and the polarizing material removal area corresponds to the area of ​​the camera hole; and the backlight structure comprises a support frame and a camera hole light-shielding adhesive layer, the camera hole is opened on the support frame, and a supporting protrusion is arranged on the side of the support frame facing the lower polarizer, the supporting protrusion is arranged around the camera hole, one side of the camera hole light-shielding adhesive layer is attached to the support protrusion, and the other side of the camera hole light-shielding adhesive layer is attached to the lower polarizer.

[0007] In one embodiment, the supporting protrusion is a plastic supporting protrusion.

[0008] In one embodiment, the plastic support protrusion is a black plastic support protrusion or a gray plastic support protrusion.

[0009] In one embodiment, the support frame is a metal support frame, and the metal support frame and the plastic support protrusion form an integrated structure of plastic and iron.

[0010] In one of the embodiments, a polarization avoidance hole is provided on the upper polarizer, and the polarization avoidance hole corresponds to the area of ​​the camera hole.

[0011] In one embodiment, the diameter of the polarizing light avoiding hole is larger than the diameter of the polarizing material clearing area.

[0012] In one of the embodiments, a cover plate is further included, and the cover plate, the liquid crystal display screen and the backlight structure are stacked in sequence from top to bottom.

[0013] In one of the embodiments, the cover plate is bonded to the liquid crystal display screen by OCA optical adhesive.

[0014] In one embodiment, the cover plate is a glass cover plate.

[0015] In one embodiment, the backlight structure further includes an optical element, the optical element is accommodated in the support frame, and the optical element includes a brightness enhancement film, a diffusion film, a light guide plate and a reflection film stacked in sequence from top to bottom.

[0016] Compared with the prior art, the utility model has at least the following advantages:

[0017] The utility model of the integrated touch display module with light leakage prevention removes the polarizing material on the PVA polarizing layer of the lower polarizer by laser, thereby forming a polarizing material removal area for avoiding the camera hole, that is, the lower polarizer only removes the polarizing material, so that the polarizing material removal area achieves high transmittance, so that the pasting area between the camera hole light shielding glue layer and the lower polarizer can be increased, and the separation of the area and light leakage can be avoided; further, a supporting protrusion is added at the position of the support frame corresponding to the camera hole in the backlight structure, and the pasting area between the camera hole light shielding glue layer and the support frame is increased by the supporting protrusion, so as to avoid the separation of the area and light leakage. In this way, a dispensing process can be omitted, thereby improving production efficiency and production yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below.

[0019] Figure 1 Schematic diagram of the basic structure of a polarizer;

[0020] Figure 2 A schematic diagram of the structure of an integrated touch display module for opening a blind hole for installing a camera;

[0021] Figure 3 It is a structural schematic diagram of an integrated touch display module for preventing light leakage in one embodiment of the utility model;

[0022] Figure 4 for Figure 3 Schematic diagram of the structure of the lower polarizer of the integrated touch display module for preventing light leakage. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0024] See also Figure 3 and Figure 4As shown, an integrated touch display module 30 for preventing light leakage includes: a liquid crystal display screen and a backlight structure, the liquid crystal display screen includes an upper polarizer 110, an upper glass 120, a lower glass 130 and a lower polarizer 140 stacked in sequence from top to bottom, a PVA polarizer layer 141 is provided in the lower polarizer 140, a polarizing material layer is formed on the PVA polarizer layer 141, and a polarizing material removal area 141a is provided in the PVA polarizer layer 141; a camera hole 210 is opened on the backlight structure, and the polarizing material The clearing area 141a corresponds to the area of ​​the camera hole 210; and the backlight structure includes a support frame 220 and a camera hole light-shielding adhesive layer 230, the camera hole 210 is opened on the support frame 220, and a supporting protrusion 221 is provided on the side of the support frame 220 facing the lower polarizer 140, the supporting protrusion 221 is arranged around the camera hole 210, one side of the camera hole light-shielding adhesive layer 230 is attached to the supporting protrusion 221, and the other side of the camera hole light-shielding adhesive layer 230 is attached to the lower polarizer 140.

[0025] It should be noted that the PVA layer on the polarizer is the core part of the polarizer. It is on the PVA substrate layer, and is dyed with iodine or various organic dyes with dichroic properties and then extended to make the PVA substrate layer have polarization properties, that is, iodine or various organic dyes with dichroic properties are polarizing material layers. When the polarizing material layer is removed, the substrate layer with high transmittance is exposed. In order to avoid the light path of the camera hole, the conventional practice is to directly open a hole in the polarizer. For example, if a conventional lower polarizer needs to be opened, it is necessary to add a dispensing process to solve the problem of light leakage in the camera hole area. However, adding a dispensing process requires adding dispensing equipment accordingly, which will increase the production process and cost, and the dispensing process is complicated, which affects the production efficiency and production yield. At the same time, it will also result in a small area for the light-shielding glue 20c to be pasted with the lower polarizer 20b and the iron frame 20e at the backlight opening. Therefore, in the present invention, a non-perforated design is adopted in the area of ​​the lower polarizer corresponding to the camera hole, and the polarizing material layer on the PVA polarizing layer 141 of the upper polarizer is removed by laser, that is, the organic dye is removed, so that the polarizing material removal area 141a corresponding to the camera hole light path becomes colorless, transparent and has high transmittance, so that the bonding area between the camera hole light shielding adhesive layer 230 and the lower polarizer 140 can be increased, and the bonding firmness can be improved to avoid the camera hole light shielding adhesive layer 230 and the lower polarizer 140 from separating under vibration and causing light leakage; further, a supporting protrusion 221 is added to the position of the support frame 220 in the backlight structure corresponding to the camera hole 210, and the bonding area between the camera hole light shielding adhesive layer 230 and the support frame 220 is increased by the supporting protrusion 221, and the bonding firmness can be improved, so as to avoid the camera hole light shielding adhesive layer 230 and the support frame 220 from separating and causing light leakage. In addition, in the present invention, the support protrusion 221 is in the same position as the existing glue dispensing glue, which will not affect the use of the integrated touch display module, so the glue dispensing process can be omitted, thereby improving production efficiency and production yield.

[0026] In one embodiment, the support protrusion 221 is a plastic support protrusion. Plastic material is light, which can reduce the overall weight of the backlight structure. At the same time, plastic material, compared with metal material, can avoid scratches on the camera when assembling the camera.

[0027] Furthermore, the plastic support protrusion is a black plastic support protrusion or a gray plastic support protrusion. Dark colors such as black or gray have low light transmittance, so they can increase the shading effect and prevent light leakage.

[0028] Furthermore, the support frame 220 is a metal support frame, and the metal support frame and the plastic support protrusion form a rubber-iron integrated structure. The metal material has high strength, which can ensure the firmness of the overall structure; further, the metal support frame and the plastic support protrusion form a rubber-iron integrated structure, that is, the metal support frame and the plastic support protrusion are formed in one piece by using a corresponding mold, so as to ensure the overall structural strength and improve the processing efficiency.

[0029] See also Figure 3 As shown, in one embodiment, a polarization avoidance hole is provided on the upper polarizer 110, and the polarization avoidance hole corresponds to the area of ​​the camera hole. That is, the upper polarizer can be designed according to conventional openings to achieve the function of avoiding the camera hole. In this embodiment, the diameter of the polarization avoidance hole is larger than the diameter of the polarizing material removal area. Since the optical path of the camera gradually expands outward, it is necessary to make the diameter of the polarization avoidance hole of the upper polarizer 110 located in the upper layer larger than the diameter of the polarizing material removal area to match the optical path of the camera.

[0030] Furthermore, the integrated touch display module further includes a cover plate 310 , and the cover plate 310 , the liquid crystal display screen and the backlight structure are stacked in sequence from top to bottom.

[0031] Furthermore, the cover plate 310 is bonded to the liquid crystal display screen through an OCA (special adhesive) optical glue 320. The OCA optical glue has good bonding performance and high light transmittance, so it can ensure bonding firmness and display effect.

[0032] Preferably, the cover plate 310 is a glass cover plate.

[0033] In one embodiment, the backlight structure further includes an optical element, which is accommodated in the support frame and includes a light enhancement film 240, a diffusion film 250, a light guide plate 260 and a reflective film 270 stacked in sequence from top to bottom. The display effect can be ensured by the optical element.

[0034] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An integrated touch display module with anti-light leakage, characterized in that: include: A liquid crystal display screen, the liquid crystal display screen comprising an upper polarizer, an upper glass, a lower glass and a lower polarizer stacked in sequence from top to bottom, a PVA polarizer layer being provided in the lower polarizer, a polarizing material layer being formed on the PVA polarizer layer, and a polarizing material removal area being provided in the PVA polarizer layer; and A backlight structure, wherein a camera hole is provided on the backlight structure, and the polarizing material removal area corresponds to an area of ​​the camera hole; The backlight structure includes a support frame and a camera hole light-shielding adhesive layer, the camera hole is opened on the support frame, and a supporting protrusion is provided on the side of the support frame facing the lower polarizer, the supporting protrusion is arranged around the camera hole, one side of the camera hole light-shielding adhesive layer is attached to the supporting protrusion, and the other side of the camera hole light-shielding adhesive layer is attached to the lower polarizer.

2. The light leakage-proof integrated touch display module according to claim 1, characterized in that: The supporting protrusion is a plastic supporting protrusion.

3. The light leakage-proof integrated touch display module according to claim 2, characterized in that: The plastic supporting protrusion is a black plastic supporting protrusion or a grey plastic supporting protrusion.

4. The light leakage-proof integrated touch display module according to claim 2, characterized in that: The support frame is a metal support frame, and the metal support frame and the plastic support protrusion form a plastic-iron integrated structure.

5. The light leakage-proof integrated touch display module according to any one of claims 1 to 4, characterized in that: The upper polarizer is provided with a polarization avoidance hole, and the polarization avoidance hole corresponds to the area of ​​the camera hole.

6. The light leakage-proof integrated touch display module according to claim 5, characterized in that: The diameter of the polarized light avoiding hole is greater than the diameter of the polarized light material clearing area.

7. The light leakage-proof integrated touch display module according to any one of claims 1 to 4, characterized in that: It also includes a cover plate, and the cover plate, the liquid crystal display screen and the backlight structure are stacked in sequence from top to bottom.

8. The light leakage-proof integrated touch display module according to claim 7, characterized in that: The cover plate is bonded and connected to the liquid crystal display screen through OCA optical adhesive.

9. The light leakage-proof integrated touch display module according to claim 7, characterized in that: The cover plate is a glass cover plate.

10. The light leakage-proof integrated touch display module according to any one of claims 1 to 4, characterized in that: The backlight structure further includes an optical element, which is accommodated in the support frame and includes a brightness enhancement film, a diffusion film, a light guide plate and a reflection film which are sequentially stacked from top to bottom.

Images