Polarizer, liquid crystal display panel and liquid crystal display module

Abstract

The utility model discloses a polaroid. The polaroid comprises a polarizing film layer, a diffusion film layer and a hardened coating which are sequentially stacked. The polaroid can prevent the diffusion film layer from being scratched by foreign objects. The utility model discloses a liquid crystal display panel and a liquid crystal display module. The liquid crystal display panel and the liquid crystal display module comprise the polaroid.

Description

Technical Field

[0001] The utility model relates to display technology, in particular to a polarizing film, a liquid crystal display panel and a liquid crystal display module. Background Art

[0002] The LCD module generally includes a LCD panel and a backlight module. The backlight module is used to provide the LCD panel with the backlight required for display. The LCD panel controls the transmission or interception of the backlight through dot-matrix distributed light valves, thereby making the backlight present the desired display image.

[0003] In the backlight module, the reflective sheet is used to completely transmit the backlight emitted by the backlight strip into the light guide plate to minimize useless loss. The backlight strip is located on the side of the light guide plate, and the light guide plate guides the backlight emitted by the backlight strip to be emitted from its front side. Therefore, the backlight module will inevitably have the problem of uneven light output.

[0004] In order to solve the above problems, the Chinese patent application number CN202220161381.1 discloses a polarizer, which includes a polarizing layer, a light-enhancing film layer and a diffusion film layer stacked in sequence, and the diffusion film layer can diffuse the light source from the upper surface of the upper glass substrate or the lower surface of the lower glass substrate in the liquid crystal display panel. The polarizer of the Chinese patent integrates a light-enhancing film layer for screen brightening and a diffusion film layer for diffusing the light source, wherein the diffusion film layer can improve the problem of uneven light output of the backlight module.

[0005] However, the diffusion film layer in the polarizer is easily scratched by external hard objects during assembly, storage and transportation, thereby causing product defects. Utility Model Content

[0006] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides a polarizer, which can prevent the diffusion film layer from being scratched by foreign objects.

[0007] The utility model provides a liquid crystal display panel and a liquid crystal display module, comprising the above-mentioned polarizing film.

[0008] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0009] A polarizer comprises a polarizing film layer, a diffusion film layer and a hardening coating layer which are stacked in sequence.

[0010] Furthermore, the hardening coating is a non-metallic nitride coating, a non-metallic oxide coating, a non-metallic carbide coating, a non-metallic oxynitride coating, a non-metallic carbonitride coating or a non-metallic oxycarbide coating.

[0011] Furthermore, the thickness of the hardened coating is 1-3 μm.

[0012] Furthermore, the polarizer also includes a protective film layer, and the protective film layer is arranged on a surface of the hardening coating layer on a side facing away from the diffusion film layer.

[0013] Furthermore, the polarizer also includes a first pressure-sensitive adhesive layer, and the first pressure-sensitive adhesive layer is arranged on a surface of the polarizing film layer on a side facing away from the diffusion film layer.

[0014] Furthermore, the first pressure-sensitive adhesive layer is an anti-static pressure-sensitive adhesive.

[0015] Furthermore, the polarizer further comprises a release film layer, and the release film layer is arranged on a surface of the first pressure-sensitive adhesive layer on a side facing away from the polarizing film layer.

[0016] Furthermore, the polarizer also includes a second pressure-sensitive adhesive layer, and the polarizing film layer and the diffused film layer are relatively bonded via the second pressure-sensitive adhesive layer.

[0017] A liquid crystal display panel comprises an upper polarizer, an upper substrate, a lower substrate and a lower polarizer which are stacked in sequence, wherein at least one of the upper polarizer and the lower polarizer is the above-mentioned polarizer.

[0018] A liquid crystal display module comprises a backlight module and the above-mentioned liquid crystal display panel, wherein the liquid crystal display panel is arranged on the light-emitting side of the backlight module.

[0019] The utility model has the following beneficial effects: the polarizer of the utility model integrates the diffusion film layer on the surface of the polarizing film layer, utilizes the diffusion film layer to scatter the backlight of the backlight module to form uniform light output, and integrates the hardening coating on the surface of the diffusion film layer, utilizes the hardening coating to protect the surface of the diffusion film layer, so as to prevent the diffusion film layer from being scratched by external hard objects during assembly, storage and transportation, thereby improving product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the stacking structure of the polarizers provided by the utility model.

[0021] Figure 2 This is a schematic diagram of the stacking structure of the liquid crystal display panel provided by the utility model.

[0022] Figure 3 This is a schematic diagram of the stacking structure of the liquid crystal display module provided by the utility model. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] Embodiment 1

[0028] like Figure 1 As shown, a polarizer includes a polarizing film layer 220, a diffusion film layer 240 and a hardening coating layer 250 which are stacked in sequence.

[0029] Specifically, the specific application scenario of the polarizer can be: attached to the upper surface of the upper substrate of the liquid crystal display panel, or attached to the lower surface of the lower substrate of the liquid crystal display panel, or set on the light-emitting side of the backlight module. It should be noted that when the polarizer is set on the light-emitting side of the backlight module, since the lower polarization function of the liquid crystal display panel has been integrated into the backlight module at this time, when assembling the liquid crystal display panel, the liquid crystal display panel only needs to attach the upper polarizer to the upper surface of its upper substrate.

[0030] The polarizer of the utility model integrates the diffusion film layer 240 on the surface of the polarizing film layer 220, and utilizes the diffusion film layer 240 to scatter the backlight of the backlight module to form uniform light output, and integrates the hardening coating 250 on the surface of the diffusion film layer 240, and utilizes the hardening coating 250 to protect the surface of the diffusion film layer 240, so as to prevent the diffusion film layer 240 from being scratched by external hard objects during assembly, storage and transportation, thereby improving product yield.

[0031] The hardened coating 250 is a coating with excellent properties such as high hardness, wear resistance, and high temperature oxidation resistance, and is widely used to improve the performance of workpieces such as tools, cutting tools, and molds. The hardened coating 250 is formed directly on the surface of the workpiece by physical vapor deposition (PVD) or chemical vapor deposition (CVD) technology of hard materials. Among them, the PVD coating process includes steps such as loading, vacuuming, heating, plasma etching, coating deposition, cooling, and unloading. For example, the PLATIT coating system uses different etching processes and coating deposition technologies, such as arc, sputtering or mixed plating LACS® technology, as well as PECVD coating process.

[0032] The hardened coating 250 may be, but is not limited to, a non-metallic nitride coating (such as a silicon nitride coating), a non-metallic oxide coating (such as a silicon oxide coating), a non-metallic carbide coating (such as a silicon carbide coating), a non-metallic oxynitride coating (such as a silicon oxynitride coating), a non-metallic carbonitride coating (such as a silicon carbonitride coating) or a non-metallic carbon oxide coating (such as a silicon oxycarbide coating), etc.; the thickness of the hardened coating 250 is preferably 1-3 μm.

[0033] The polarizing film layer 220 has a total thickness of 80±5 um and is made of a polymer material (such as polyvinyl alcohol PVA). It realizes the polarizing function by adsorbing iodine or dye molecules and is composed of a zero-compensation triacetyl cellulose film layer 221, a polyvinyl alcohol film layer 222 and a triacetyl cellulose film layer 223 stacked in sequence.

[0034] The diffusion film layer 240 is made by a coating process, and a diffusion coating is formed on the surface of a transparent film by an electrostatic coating technology. The diffusion coating can be made of a variety of polymer materials, such as methacrylate, polyester, polycarbonate, etc.

[0035] Preferably, the polarizer also includes a protective film layer 260, which is disposed on the surface of the hardened coating 250 on the side facing away from the diffusion film layer 240. The protective film layer 260 is used to cover the hardened coating 250 to provide a certain degree of flexible buffering for the hardened coating 250 to prevent the hardened coating 250 from being damaged by the impact of external objects.

[0036] The protective film layer 260 may be, but is not limited to, a PET protective film, a PI protective film, a PVC protective film, etc., and its surface facing the diffusion film layer 240 is self-adhesive and adheres to the surface of the diffusion film layer 240 using its own surface adhesiveness.

[0037] The protective film layer 260 needs to be peeled off after the polarizer is attached to the liquid crystal display panel or the backlight module, so the peeling force of the protective film layer 260 is required to be less than 50gf / 25mm.

[0038] Preferably, the polarizer further includes a first pressure-sensitive adhesive layer 210, which is disposed on a surface of the polarizing film layer 220 facing away from the diffusion film layer 240, and is used to adhere the polarizer to the liquid crystal display panel or backlight module.

[0039] The thickness of the first pressure-sensitive adhesive 210 layer is 15±5um, the adhesion is required to be 400±200gf / 25mm, and the surface resistance is required to be 5.0×10 8 ~3.0×10 9 Ω.

[0040] The first pressure-sensitive adhesive 210 layer is preferably an anti-static pressure-sensitive adhesive.

[0041] Preferably, the polarizer further includes a release film layer 270, which is disposed on a surface of the first pressure-sensitive adhesive 210 layer facing away from the polarizing film layer 220, and is used to protect the first pressure-sensitive adhesive 210 before the polarizer is attached to prevent the pressure-sensitive adhesive from being contaminated by dust, fingerprints, etc. before attachment. The peeling force of the release film layer 270 is required to be less than or equal to 10gf / 25mm.

[0042] Preferably, the polarizer further includes a second pressure-sensitive adhesive 230 layer, and the polarizing film layer 220 and the bulk film layer are relatively bonded via the second pressure-sensitive adhesive 230 layer.

[0043] The second pressure-sensitive adhesive layer 230 is made of ordinary pressure-sensitive adhesive with a thickness of 15±5 um. In order to ensure a firm bond between the polarizing film layer 220 and the diffusion film layer 240 , the adhesion force of the second pressure-sensitive adhesive layer 230 is required to be 400±200 gf / 25 mm.

[0044] Embodiment 2

[0045] like Figure 2 As shown, a liquid crystal display panel includes an upper polarizer 21, an upper substrate 22, a lower substrate 23 and a lower polarizer 24 stacked in sequence, and at least one of the upper polarizer 21 and the lower polarizer 24 is the polarizer described in the first embodiment.

[0046] The liquid crystal display panel of the utility model integrates the diffusion film layer 240 in at least one of the upper polarizer 21 and the lower polarizer 24, and uses the diffusion film layer 240 to scatter the backlight of the backlight module to form uniform light output, and integrates the hardening coating 250 on the surface of the diffusion film layer 240. The hardening coating 250 is used to protect the surface of the diffusion film layer 240 to prevent the diffusion film layer 240 from being scratched by external hard objects during assembly, storage and transportation, thereby improving product yield.

[0047] The upper polarizer 21 or the lower polarizer 24 is respectively attached to the surface of the upper substrate 22 or the lower substrate 23 using the first pressure-sensitive adhesive 210 layer provided therewith. After attachment, the hardened coating 250 in the upper polarizer 21 or the lower polarizer 24 faces outside the liquid crystal display panel.

[0048] Embodiment 3

[0049] like Figure 3 As shown, a liquid crystal display module comprises a backlight module 1 and the liquid crystal display panel 2 described in the second embodiment, wherein the liquid crystal display panel 2 is arranged on the light emitting side of the backlight module 1 .

[0050] The backlight module 1 includes a backlight frame 11 and a backlight light bar 12, a light guide plate 13 and a reflective sheet 14 arranged in the backlight frame 11, the backlight light bar 12 is located on the side of the light guide plate 13, the reflective sheet 14 is located on the lower surface of the light guide plate 13, and the upper surface of the light guide plate 13 serves as the light output side of the backlight module 1.

[0051] 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 polarizer, characterized in that: It comprises a polarizing film layer, a diffusion film layer and a hardening coating layer which are stacked in sequence, wherein the hardening coating layer is a non-metallic nitride coating layer, a non-metallic oxide coating layer, a non-metallic carbide coating layer, a non-metallic oxynitride coating layer, a non-metallic carbonitride coating layer or a non-metallic oxycarbide coating layer.

2. The polarizer according to claim 1, characterized in that: The thickness of the hardened coating is 1-3 μm.

3. The polarizer according to claim 1, characterized in that: The polarizer further includes a protective film layer, which is disposed on a surface of the hardening coating layer facing away from the diffusion film layer.

4. The polarizer according to claim 1, characterized in that: The polarizer also includes a first pressure-sensitive adhesive layer, which is disposed on a surface of the polarizing film layer on a side facing away from the diffusion film layer.

5. The polarizer according to claim 4, characterized in that: The first pressure-sensitive adhesive layer is an anti-static pressure-sensitive adhesive.

6. The polarizer according to claim 4, characterized in that: The polarizer further includes a release film layer, and the release film layer is arranged on a surface of the first pressure-sensitive adhesive layer on a side facing away from the polarizing film layer.

7. The polarizer according to claim 1, characterized in that: The polarizer also includes a second pressure-sensitive adhesive layer, and the polarizing film layer and the diffused film layer are relatively bonded via the second pressure-sensitive adhesive layer.

8. A liquid crystal display panel, comprising an upper polarizer, an upper substrate, a lower substrate and a lower polarizer stacked in sequence, characterized in that: At least one of the upper polarizer and the lower polarizer is the polarizer according to claim 1.

9. A liquid crystal display module, characterized in that: It comprises a backlight module and the liquid crystal display panel as claimed in claim 8, wherein the liquid crystal display panel is arranged on the light emitting side of the backlight module.

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