CN217767124U

CN217767124U - Backlight module with polarization function, display module and display device

Info

Publication number: CN217767124U
Application number: CN202220823082.XU
Authority: CN
Inventors: 魏玲枫
Original assignee: Truly Opto Electronics Ltd
Current assignee: Truly Opto Electronics Ltd
Priority date: 2022-04-11
Filing date: 2022-04-11
Publication date: 2022-11-08
Anticipated expiration: 2032-04-11

Abstract

The utility model discloses a take polarisation function's backlight unit, backlight unit includes from bottom to top that piles up in proper order in a poor light iron stand, reflectance coating, light guide plate, adds lustre to membrane and last membrane of adding lustre to down, backlight unit's top surface piles up and sets up polarisation functional structure, and the upper surface of going up the membrane of adding lustre to promptly piles up and sets up polarisation functional structure, polarisation functional structure includes PVA rete and TAC rete that pile up in proper order from bottom to top. The utility model discloses increase 3 layers of polarisation membrane materials on backlight unit the superiors' membrane material to adopt black waterproof glue frame to seal in its periphery. By the structure, the display module is changed from the original mode that the polaroid is attached firstly and then the backlight module is assembled into the mode that the backlight module with the polarization function is assembled, so that the process flow is reduced, the poor manufacturing process is reduced, and the cost is saved. Meanwhile, the original backlight shading glue and a layer of polaroid TAC are removed, the thickness of the module is reduced, the material cost is saved, and the market competitiveness of the product is improved.

Description

Backlight module with polarization function, display module and display device

Technical Field

The utility model belongs to the technical field of liquid crystal display, concretely relates to backlight unit, display module assembly and display device of band of polarization function.

Background

With the development of electronic technology, portable electronic products such as mobile phones, wristbands, IPADs and notebook computers become necessities for daily life and office work of people, the electronic products have rich functions and numerous models, consumers have more selection spaces, and the functions of the electronic products are almost similar, so that the consumers pay more attention to the cost performance of the products when selecting the electronic products. Therefore, in order to obtain more market shares, competition among manufacturers is more and more intense, at present, the competition of electronic products is basically the quality and price of the products, the price of the products depends on the market supply condition and the cost of the products, and the cost of the products is crucial to the competition of the market shares under the current competitive market environment. The cost of the current electronic products is basically material cost, process cost, labor cost, equipment depreciation cost and the like, wherein the most important cost is the material cost and the process cost.

For the current electronic products, display screens are basically configured, wherein the important components of the liquid crystal display screen are an LCD panel and a backlight module. To the LCD panel, all attached polaroid of its lower both sides face, the LCD panel is together fixed through being shaded with backlight unit and shading glue with backlight unit, and its stack structure is as shown in fig. 1, and the polaroid mainly comprises PVA polarisation layer 33, last TAC protective layer 32, lower TAC protective layer 34, PSA glue film 31, and PVA polarisation layer plays the polarization to the light, and the TAC protective layer is used for protecting PVA polarisation layer, and the PSA glue film is pasted in 2 surfaces of LCD panel with the polaroid.

The backlight module generally comprises a light source and a backlight structure, the stack structure of the backlight module is shown in fig. 2, and the backlight module mainly comprises a backlight iron frame 51, a reflective film 52, a light guide plate 53, a lower brightness enhancement film 54, an upper brightness enhancement film 55, an LED light source 56, and the like. For the current display module, an LCD panel, a polarizer and a backlight module need to be manufactured separately and then assembled and combined, the manufacturing process is complex, and a protective film and a packing material need to be added to each part, so that the material cost is increased invisibly, the cost is difficult to reduce under the current structure, and the competitiveness is improved. Therefore, it is necessary to integrate the manufacturing processes, reduce the material cost and the process cost, and improve the market competitiveness of the product.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that needs to solve provides a backlight unit, display module and display device of band of polarization function, piles up the polarisation structure on this backlight unit, and when assembling with the LCD panel, saved backlight shading and glued, still saved the process of LCD panel laminating polaroid simultaneously.

In order to solve the above problems, the utility model adopts the following technical scheme:

the utility model provides a take polarization function's backlight unit, backlight unit includes the iron stand in a poor light, reflectance coating, light guide plate, the membrane that adds lustre to and the last membrane that adds lustre to that stacks gradually from bottom to top, backlight unit's top surface is piled up and is set up polarization function structure, and the upper surface that goes up the membrane promptly piles up and sets up polarization function structure, polarization function structure includes PVA rete and TAC rete that stack gradually from bottom to top.

Further, the polarization function structure also comprises a PSA glue layer, and the PSA glue layer is positioned on the upper surface of the TAC film layer.

Preferably, the PVA film layer, the TAC film layer and the PSA glue layer have the same external dimension.

Further, PVA rete, TAC rete and PSA glue film lateral surface set up the waterproof frame of gluing all around, the upper surface and the PSA glue film upper surface of waterproof frame of gluing flush, the lower surface of waterproof frame of gluing is fixed with backlight unit's gluey frame bonding.

Preferably, the waterproof frame material is black waterproof glue.

Preferably, the thickness of the PVA film layer is 15-60 μm.

Preferably, the thickness of the TAC film layer is 20-100 μm.

The utility model provides a display module assembly, display module assembly adopts above-mentioned any technical scheme take backlight unit of polarisation function.

Further, the display module further comprises an LCD panel, the LCD panel mainly comprises a CF glass substrate, a TFT glass substrate and liquid crystal located between the CF glass substrate and the TFT glass substrate, a polarizer is attached to the upper surface of the CF glass substrate, and the lower surface of the TFT glass substrate is fixedly bonded with the backlight module through OCA glue or PSA glue layers.

A display device adopts a backlight module with a polarization function or a display module according to any one of the above technical schemes.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

the utility model discloses on current backlight unit's basis, remove backlight shading and glue, increase PVA rete, TAC rete, PSA glue film on backlight unit the superiors membrane material in proper order, the PSA glue film be used for with TFT lower surface paste. The periphery of the 3 layers of polarizing film materials is sealed by adopting a black waterproof glue frame, so that light leakage can be prevented, the PVA film layer can be protected, and backlight can be adhered to the lower surface of the LCD panel. By the structure, the display module is changed from the original mode that the polaroid is attached firstly and then the backlight module is assembled into the mode that the backlight module with the polarization function is assembled, so that the process flow is reduced, the poor manufacturing process is reduced, and the cost is saved. Meanwhile, the original backlight shading glue and a layer of polaroid TAC are removed, the thickness of the module is reduced, the material cost is saved, and the market competitiveness of the product is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments are briefly introduced below, and as part of the present invention, the exemplary embodiments and the description thereof are used for explaining the present invention, but do not constitute undue limitations on the present invention.

The drawings are illustrated as follows:

FIG. 1 is a schematic structural view of a conventional LCD panel bonded and fixed to a backlight module by a light-shielding adhesive;

FIG. 2 is a schematic structural diagram of a conventional backlight module;

fig. 3 is a schematic structural diagram of a backlight module with polarization function according to the present invention;

wherein: 1. go up the polaroid, 2, LCD panel, 3, the polaroid, 31, PSA glue film, 32, go up the TAC protective layer, 33, PVA polarizing layer, 34, lower TAC protective layer, 4, shading glue, 5, backlight unit, 51, iron frame in a poor light, 52, reflectance coating, 53, light guide plate, 54, the membrane that adds lustre to down, 55, go up the membrane 56 that adds lustre to, the LED light source, 57, FPC in a poor light, 58, shading glue, 60, the waterproof glue frame, 70, PVA rete, 80, TAC rete, 90, PSA glue film.

Detailed Description

To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is obvious that the described embodiments of the invention are only some of the embodiments of the invention, and not all of them. Therefore, the following detailed description of the embodiments is not intended to limit the scope of the present invention, but is provided to facilitate understanding of the present invention by those skilled in the art; all other embodiments obtained by a person skilled in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

In the description of the present invention, it is to be noted that the terms "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but 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 thus, should not be construed as limiting the present invention; unless explicitly defined otherwise.

In the description of the present invention, the english abbreviations, phrases, etc. used have certain chinese meanings, and for english abbreviations, phrases, which are not annotated or explained, are technical terms well known to those skilled in the art, and for english abbreviations, phrases, etc. having other meanings, the specific chinese comments are as follows:

the OCA is short for optical Clear additive, and the Chinese finger: an optically clear adhesive.

LCD is short for Liquid Crystal Display, and translation into Chinese is as follows: liquid crystal displays, herein referred to as liquid crystal display panels.

TFT is the abbreviation of Thin Film Transistor, and translation into Chinese is as follows: and a thin film transistor.

CF is the abbreviation of Color Filter, and the translation into Chinese is as follows: a color filter.

PSA is the abbreviation of Pressure Sensitive Adhesive, and translation into Chinese is as follows: pressure sensitive adhesive, this Wen Zhiya pressure sensitive adhesive layer.

PVA is the abbreviation of polyvinyl alcohol, and translation into Chinese is: polyvinyl alcohol, referred to herein as a polarizing film layer.

TAC is short for Triacetyl Cellulose, and translation into Chinese is as follows: cellulose triacetate, referred to herein as a cellulose triacetate protective layer.

The utility model relates to a backlight unit, display module assembly and display device of band elimination optical function for it is loaded down with trivial details to solve current display module assembly manufacturing process, problem that the material cost is high, the utility model discloses an increase polarizing film material in backlight unit the superiors, can save the step of laminating down polarizing film, polarizing film material that increases simultaneously compares with current polarizing film, has saved the one deck TAC protective layer at least, can also save backlight simultaneously and hide optical glue, in save material, reduces technology, and attenuate product thickness improves the product competitiveness.

As shown in fig. 3, backlight unit include from bottom to top that piles up in proper order that iron frame 51 in a poor light, reflectance coating 52, light guide plate 53, the membrane 54 that adds lustre to down and last membrane 55 etc. add lustre to, in order to make it possess the polarisation function backlight unit's top surface is piled up and is set up polarisation functional structure, piles up the structure that sets up polarisation functional structure at the upper surface of last membrane 55 promptly, polarisation functional structure includes PVA rete 70 and TAC rete 80 that pile up in proper order from bottom to top, and PVA rete 70 directly piles up on adding lustre to promptly, for protection PVA rete 70, piles up TAC rete 80 on PVA rete 70, and such backlight unit structure has basically possessed the function of partially being correlated.

To the utility model discloses, for the convenience with the laminating of LCD panel, polarisation functional structure still include the PSA glue film, PSA glue film 90 is located TAC rete 80 upper surface, utilizes PSA glue film 90 and LCD panel to laminate. Of course, this is only a preferred embodiment of the present invention, and the PSA layer 90 may also be OCA glue or other transparent adhesive.

To the utility model discloses, PVA rete 70, TAC rete 80 and PSA glue film 90 overall dimension the same. Thus, the PVA film 70 is protected from water absorption and deformation from the periphery of the side surface. Most the utility model discloses a preferred embodiment, PVA rete 70, TAC rete 80 and PSA glue film 90 lateral surface set up waterproof gluey frame 60 all around, the upper surface of waterproof gluey frame 60 and PSA glue film 90 upper surface flush, the lower surface of waterproof gluey frame 60 bonds fixedly with backlight unit's gluey frame.

Because backlight unit's characteristic, it is when laminating with the LCD panel, no longer need be shaded and hide optical cement, in order to shield light, waterproof gluey frame 60 material adopt black waterproof glue. It both can leak light, protection PVA rete 70, can also be in the same place backlight unit and LCD panel lower surface are pasted, plays sealed enclosure.

Because present technique generally all develops to frivolousization, consequently, as the preferred embodiment of the utility model, the thickness of PVA rete 70 is 15-60 mu m, the thickness of TAC rete 80 is 20-100 mu m, selects reasonable rete thickness according to technology, can attenuate the whole thickness of module as far as possible.

The aforesaid is the utility model discloses backlight unit with polarisation function's technical scheme, above-mentioned scheme can be used to display module's preparation, consequently the utility model discloses still provide a display module assembly, display module assembly adopts above-mentioned arbitrary technical scheme a take backlight unit of polarisation function. The display module further comprises an LCD panel, the LCD panel mainly comprises a CF glass substrate, a TFT glass substrate and liquid crystal located between the CF glass substrate and the TFT glass substrate, a polarizer is attached to the upper surface of the CF glass substrate, and the lower surface of the TFT glass substrate is fixedly bonded with the backlight module through OCA glue or PSA glue layers. Therefore, when the display module is manufactured, the backlight shading glue, the lower polarizer and the corresponding bonding process can be omitted, and the material cost, the process cost and the like can be saved.

The utility model also provides a display device adopts above-mentioned arbitrary technical scheme a take backlight unit of polarisation function or above-mentioned arbitrary technical scheme a display module assembly.

The backlight module with the polarization function, the display module and the display device of the embodiment of the application are introduced in detail, a specific example is applied in the above to explain the principle and the implementation of the application, and the description of the above embodiment is only used to help understand the technical scheme and the core idea of the application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. The utility model provides a take backlight unit of polarisation function, backlight unit includes from bottom to top that stacks gradually iron stand (51), reflectance coating (52), light guide plate (53), membrane (54) and last membrane (55) that add lustre to down, its characterized in that: the top surface of backlight unit piles up and sets up polarisation functional structure, and the upper surface that goes up membrane (55) promptly piles up and sets up polarisation functional structure, polarisation functional structure includes PVA rete (70) and TAC rete (80) that stack gradually from bottom to top.

2. The backlight module with polarization function according to claim 1, wherein: the polarizing function structure further comprises a PSA glue layer (90) positioned on the upper surface of the TAC film layer (80).

3. The backlight module with polarization function according to claim 2, wherein: the PVA film layer (70), the TAC film layer (80) and the PSA glue layer (90) are the same in external dimension.

4. The backlight module with polarization function according to claim 3, wherein: PVA rete (70), TAC rete (80) and PSA glue film (90) lateral surface set up waterproof gluey frame (60) all around, the upper surface and the PSA glue film (90) upper surface of waterproof gluey frame (60) flush, the lower surface of waterproof gluey frame (60) is fixed with backlight unit's gluey frame bonding.

5. The backlight module with polarization function according to claim 4, wherein: the waterproof glue frame (60) is made of black waterproof glue.

6. A backlight module with polarization function according to any one of claims 1 to 5, wherein: the thickness of the PVA film layer (70) is 15-60 mu m.

7. A backlight module with polarization function according to any one of claims 1 to 5, wherein: the TAC film layer (80) has a thickness of 20-100 μm.

8. The utility model provides a display module assembly which characterized in that: the display module comprises the backlight module with the polarization function as claimed in any one of claims 1 to 7.

9. The display module according to claim 8, wherein: the display module further comprises an LCD panel, the LCD panel mainly comprises a CF glass substrate, a TFT glass substrate and liquid crystals located between the CF glass substrate and the TFT glass substrate, a polarizer is attached to the upper surface of the CF glass substrate, and the lower surface of the TFT glass substrate is fixedly bonded with the backlight module through OCA glue or PSA glue layers (90).

10. A display device, characterized in that: comprising a backlight module with polarizing function according to any one of claims 1 to 7 or a display module according to any one of claims 8 to 9.