CN217034301U

CN217034301U - Optical film with brightening and diffusing functions

Info

Publication number: CN217034301U
Application number: CN202122833290.6U
Authority: CN
Inventors: 刘勇; 刘礼龙; 龚磊
Original assignee: Zhuhai Kemi Optoelectronics Co ltd
Current assignee: Zhuhai Kemi Optoelectronics Co ltd
Priority date: 2021-11-18
Filing date: 2021-11-18
Publication date: 2022-07-22
Anticipated expiration: 2031-11-18

Abstract

The utility model discloses an optical film with brightening and diffusing functions, which comprises: the solar cell comprises a diffusion layer, prism glue, a prism layer and a delustering coating, wherein PET (polyethylene terephthalate) base materials are arranged on the upper side and the lower side of the prism layer, the prism glue is arranged between the top of the prism layer and the PET base materials, the diffusion layer is arranged above the PET base material on the top, the delustering coating is arranged below the PET base material on the bottom, the prism structure at the top of the prism layer is provided with a high prism and a low prism, the utility model adopts a design of high and low on the prism structure of the prism layer, the adoption of the structure can effectively reduce the phenomenon of central brightness reduction caused by bonding, and under the condition of the same bonding thickness, the central brightness is improved, more low peaks are arranged, the brightness can be improved more obviously, the structure of one high prism and two low prisms is adopted, the total contact area of the high prism and the upper prism glue is increased, the reduction of the peeling force of the physical property is avoided, the brightness of the whole composite optical film is ensured, and meanwhile, the strength of the optical film is ensured.

Description

Optical film with brightening and diffusing functions

Technical Field

The utility model relates to the technical field of optical films, in particular to an optical film with brightening and diffusing functions.

Background

The LCD panel itself does not have a light emitting property, and therefore, a light emitting source must be added on the LCD panel to achieve the display effect. The backlight module is a key component for providing a backlight source for the LCD. The LCD backlight module mainly comprises a backlight source, an optical membrane, an adhesive product, an insulating product, a plastic frame and the like. The various optical films are key components of the backlight module, and can be mainly divided into a reflecting film, a diffusion film, a brightness enhancement film, a light guide plate, a lamp tube reflector and the like according to the functions of the optical films.

The optical film for the backlight module is a necessary key matching component of the liquid crystal display module, and the quality of the performance of the optical film can directly influence the quality of the liquid crystal display module. In a liquid crystal display backlight module, the optical film generally consists of "1 reflective film +1 lower diffusion film +2 brightness enhancement films +1 upper diffusion film".

As the market has high-definition and ultra-high-definition requirements on liquid crystal modules and thin design requirements, new requirements are put forward on the design of each optical film. The composite design of each functional optical film, i.e. the development of the composite film, integrates the original two or more optical films into a whole to form a new research and development direction.

In the manufacturing process of the double-layer composite brightness enhancement film in the processing process of the existing optical film with the brightness enhancement and diffusion functions, due to the film sheet laminating process, 5% -10% of inherent brightness loss is generated on the laminated film sheet compared with the film sheet before lamination, and the display effect is influenced.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to an optical film with brightness enhancement and diffusion functions, so as to solve the problems of the background art mentioned above.

In order to achieve the purpose, the utility model provides the following technical scheme: an optical film having a brightness enhancing diffusion function, comprising: diffusion layer, prism glue, prism layer and extinction coating, both sides are equipped with the PET substrate about the prism layer, be equipped with prism glue between prism layer top and the PET substrate, be located the top PET substrate top is equipped with the diffusion layer, is located the bottom PET substrate below is equipped with the extinction coating, prism layer top prism structure has high prism and low prism.

Further, the thickness of the PET substrate is 115-135 μm, the light transmittance of the PET substrate is at least 93%, the higher the light transmittance of the PET substrate is, the higher the brightness of the composite film is, and the thickness of the PET substrate is 115-135 μm, so that the requirement for thinning the whole composite film is met.

Furthermore, when the vertex angle of the prism layer is 86-94 degrees and the variation range of the vertex angle of the prism is about 90 degrees, the central brightness is the highest.

Further, the refractive index of the prism glue is 1.54-1.64, the thickness of the prism glue is 1.5-2.5 μm, the thicker the prism glue, the more the brightness is reduced, the greater the bonding strength is, and when the thickness of the prism glue is 1.5-2.5 μm, the balance between the brightness and the bonding strength is achieved.

Furthermore, the high prism and the low prism are distributed in a high-low mode.

Furthermore, the peak height of the high prism is 11-13 μm, the peak height of the low prism is 7-9 μm, when the prism glue on the upper layer is bonded with the prism layer on the lower layer, the prism peak can penetrate into the prism glue to form bonding, the brightness is reduced due to the damage of the prism peak shape, the bonding strength of the prism layer is increased, and when the high prism and the low prism are designed to be distributed in two high and low directions, the brightness of the whole composite optical film is ensured, and the strength of the optical film is ensured.

Compared with the prior art, the utility model has the beneficial effects that:

the diffusion layer, the prism layer and the high prism are arranged, so that when the optical film with the brightening diffusion function is used, the diffusion layer and the prism layer are combined into a whole, meanwhile, a high-low design is adopted on the prism structure of the prism layer, the phenomenon of central brightness reduction caused by laminating can be effectively reduced by adopting the structure, under the condition that the laminating thickness is the same, the central brightness is improved, more low peaks are arranged, the brightness can be obviously improved, a high-low structure is adopted, the high prism increases the total contact area with the upper prism glue, the reduction of the peeling force of the physical property is avoided, the brightness can be effectively improved by the low prism, the brightness of the whole composite optical film is ensured, and meanwhile, the strength of the optical film is ensured.

Drawings

FIG. 1 is a schematic view of the overall axial structure of the present invention;

FIG. 2 is a schematic view of a prism layer structure according to the present invention.

In the figure: 1-a diffusion layer; 2-a PET substrate; 3-prism glue; 4-a prism layer; 401-tall prism; 402-low prism; 5-dull coating.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: an optical film having a brightness enhancing diffusing function, comprising: diffusion layer 1, prism glue 3, prism layer 4 and extinction coating 5, both sides are equipped with PET substrate 2 about prism layer 4, be equipped with prism glue 3 between 4 tops on prism layer and the PET substrate 2, the PET substrate 2 top that is located the top is equipped with diffusion layer 1, the diffusion layer 1 of low haze is more sparse, diffusion loss to light is less, and when improving to certain extent (more than or equal to 80%) along with 1 haze on diffusion layer, the convergence effect that exists to light is greater than the diffusion loss, and then the brilliance promotes to some extent, 1 haze on diffusion layer is 90% -95%, the PET substrate 2 below that is located the bottom is equipped with extinction coating 5.

The thickness of the PET substrate 2 is 115-135 μm, the light transmittance of the PET substrate 2 is at least 93%, the higher the light transmittance of the PET substrate 2 is, the higher the brightness of the composite film is, and the thickness of the PET substrate 2 is 115-135 μm, so as to meet the thinning requirement of the whole composite film.

The vertex angle of the prism layer 4 is 86-94 degrees, when the variation range of the vertex angle of the prism is 90 degrees, the center brightness is highest, the refractive index of the prism glue 3 is 1.54-1.64, the thickness of the prism glue 3 is 1.5-2.5 microns, the thicker the prism glue 3 is, the more the brightness is reduced, the higher the bonding strength is, and when the thickness of the prism glue 3 is 1.5-2.5 microns, the balance between the brightness and the bonding strength is achieved.

The prism structure at the top of the prism layer 4 is provided with a high prism 401 and a low prism 402, the high prism 401 and the low prism 402 are distributed in a high-low mode, the peak height of the high prism 401 is 11-13 microns, the peak height of the low prism 402 is 7-9 microns, when the prism glue 3 on the upper layer is attached to the prism layer 4 on the lower layer, the prism peak can penetrate into the prism glue to form bonding, the breaking loss of the prism peak shape is formed, the brightness is reduced, the attaching strength of the prism layer 4 is increased, and when the high prism 401 and the low prism 402 are designed in a high-low mode, the brightness of the whole composite optical film is guaranteed, and the strength of the optical film is guaranteed.

The working principle is as follows: when the optical film with the brightening diffusion function is used, the diffusion layer 1 and the prism layer 4 are combined into a whole, the prism structure of the prism layer 4 is simultaneously provided with a high-two-low design, the structure can effectively reduce the central brightness reduction phenomenon brought by the laminating, the central brightness is improved under the condition that the laminating thickness is the same, more low peaks are arranged, the brightness is improved more obviously, the structure is high-two-low, the high prism increases the total contact area with the upper prism glue 3, the reduction of the physical property stripping force is avoided, the brightness can be effectively improved by the low prism, the brightness of the whole composite optical film is ensured, and the strength of the optical film is ensured.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An optical film having a brightness enhancing diffusion function, comprising: diffusion layer (1), prism glue (3), prism layer (4) and extinction coating (5), both sides are equipped with PET substrate (2), its characterized in that about prism layer (4): be equipped with prism glue (3) between prism layer (4) top and PET substrate (2), be located the top PET substrate (2) top is equipped with diffusion barrier (1), is located the bottom PET substrate (2) below is equipped with extinction coating (5), prism layer (4) top prism structure has high prism (401) and low prism (402).

2. An optical film with brightness enhancing diffusing function as defined in claim 1, wherein: the thickness of the PET base material (2) is 115-135 mu m, and the light transmittance of the PET base material (2) is at least 93%.

3. An optical film with brightness enhancing diffusing function as defined in claim 1, wherein: the angle of the vertex angle of the prism layer (4) is 86-94 degrees.

4. An optical film having a brightness enhancing diffusing function as claimed in claim 1, wherein: the refractive index of the prism glue (3) is 1.54-1.64, and the thickness of the prism glue (3) is 1.5-2.5 microns.

5. An optical film with brightness enhancing diffusing function as defined in claim 1, wherein: the high prisms (401) and the low prisms (402) are distributed in a high-low mode.

6. An optical film having a brightness enhancing diffusing function according to claim 5, wherein: the peak height of the high prisms (401) is 11-13 μm, and the peak height of the low prisms (402) is 7-9 μm.