CN105093365A - Diffusion sheet and manufacturing method thereof - Google Patents
Diffusion sheet and manufacturing method thereof Download PDFInfo
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- CN105093365A CN105093365A CN201510472676.5A CN201510472676A CN105093365A CN 105093365 A CN105093365 A CN 105093365A CN 201510472676 A CN201510472676 A CN 201510472676A CN 105093365 A CN105093365 A CN 105093365A
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- diffusion
- base material
- photoresistance
- diffusion sheet
- particle
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Abstract
The invention discloses a diffusion sheet and a manufacturing method thereof, belongs to the display technology field, and solves a technical problem that other optical components are scratched by a conventional diffusion sheet easily. The diffusion sheet comprises a base material and a diffusion layer; the diffusion layer comprises a plurality of diffusion particles formed on the upper surface of the base material, and the upper surfaces of the diffusion particles are planes. The diffusion sheet can be used in a backlight module group of an LCD.
Description
Technical field
The present invention relates to display technique field, specifically, relate to a kind of diffusion sheet and manufacture method thereof.
Background technology
Along with the development of display technique, liquid crystal display has become display device the most common.Backlight module is the vitals in liquid crystal display, for providing backlight for liquid crystal display.
Backlight module is primarily of part compositions such as light source, light guide plate, reflector plate, diffusion sheets, and wherein, the effect of diffusion sheet is for liquid crystal display provides a uniform area source.The structure of existing diffusion sheet mainly comprises base material and diffusion layer, and base material needs the material that selective light transmitance is high, and diffusion particle mixes with liquid resin, is uniformly coated on base material by coating method, forms diffusion layer.Therefore, light passes can constantly have in the medium of different refractivity at two through diffusion layer, and the phenomenon of many refractions, reflection and scattering can occur light at the same time, thus creates the effect of optics diffusion.But in existing diffusion sheet, diffusion particle not of uniform size, different, distribution is mixed and disorderly, therefore easy other opticses such as scratch light guide plate.
Summary of the invention
The object of the present invention is to provide a kind of diffusion sheet and manufacture method thereof, to solve the technical matters of easy other opticses of scratch of existing diffusion sheet.
The invention provides a kind of diffusion sheet, comprise base material and diffusion layer;
Described diffusion layer comprises multiple diffusion particle being formed at the upper surface of described base material, and the upper surface of described diffusion particle is plane.
Preferably, the cross section of described diffusion particle is inverted trapezoidal.
Preferably, the height of described diffusion particle is within 30 to 50 microns.
Preferably, described diffusion particle is formed through overexposure, development by photoresistance.
Further, the lower surface of described base material is formed with antistatic protection layer.
Preferably, the material of described base material is PET, PC or PMMA.
The present invention also provides a kind of manufacture method of diffusion sheet, comprising:
One deck photoresistance is coated with at the upper surface of base material;
Described photoresistance places mask plate;
Utilize mask plate described in UV light permeability, described photoresistance is exposed, developed;
Remaining photoresistance is heating and curing, forms diffusion layer.
Preferably, the thickness of described photoresistance is within 30 to 50 microns.
Further, the manufacture method of this diffusion sheet also comprises:
At the lower surface coating antistatic protection layer of described base material.
Present invention offers following beneficial effect: diffusion sheet provided by the invention comprises base material and diffusion layer, wherein diffusion layer is made up of a lot of diffusion particles, and diffusion particle is directly formed at the upper surface of base material.In the present invention, the upper surface of diffusion particle is plane, and what diffusion particle was neat is arranged on base material, the height of each diffusion particle is equal, so the upper surface of each diffusion particle is positioned at same plane, therefore, it is possible to avoid other opticses such as diffusion layer scratch light guide plate.
Other features and advantages of the present invention will be set forth in the following description, and, becoming apparent from instructions of part, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in instructions, claims and accompanying drawing and obtain.
Accompanying drawing explanation
In order to the technical scheme in the clearer explanation embodiment of the present invention, accompanying drawing required in describing is done simple introduction below to embodiment:
Fig. 1 is the schematic diagram of the diffusion sheet that the embodiment of the present invention provides;
Fig. 2 is the partial schematic diagram of the diffusion sheet that the embodiment of the present invention provides;
Fig. 3 is the partial schematic diagram of the manufacture process of the diffusion sheet that the embodiment of the present invention provides.
Embodiment
Describe embodiments of the present invention in detail below with reference to drawings and Examples, to the present invention, how application technology means solve technical matters whereby, and the implementation procedure reaching technique effect can fully understand and implement according to this.It should be noted that, only otherwise form conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other, and the technical scheme formed is all within protection scope of the present invention.
The embodiment of the present invention provides a kind of diffusion sheet, can be applied in the backlight module of liquid crystal display.As depicted in figs. 1 and 2, diffusion sheet provided by the invention comprises base material 1 and diffusion layer 2.Wherein, diffusion layer 2 comprises multiple diffusion particle 20 being formed at the upper surface of base material 1, and the upper surface of diffusion particle 20 is plane.
Further, the lower surface of base material 1 is also formed with antistatic protection layer 3.Antistatic protection layer 3 one aspect can prevent base material 1 and diffusion layer 2 by damage by static electricity.On the other hand, antistatic protection layer 3 can also play a protective role to base material 1, prevents base material 1 by the miscellaneous part scratch in backlight module, and causes the problem that the light transmission rate of base material 1 reduces.
In the present embodiment, the high material of light transmission rate chosen by base material 1, be preferably polyethylene terephthalate (PolyethyleneTerephthalate, be called for short PET), polycarbonate (Polycarbonate, be called for short PC) or polymethylmethacrylate (PolymethylMethacrylate is called for short PMMA).
As a preferred version, in the present embodiment, the cross section of diffusion particle 20 is inverted trapezoidal, makes the side of diffusion particle 20 be inclined-plane, thus effectively can reflect light, reflects.As shown in Figure 2, when light passes from below through diffusion sheet, light will be diffused the offside reflection of particle 20, in addition also can some light inner through diffusion particle 20, reflect.Therefore, there is the diffusion particle 20 in inverted trapezoidal cross section, can effectively reflect light and reflect, thus a uniform area source is provided, liquid crystal display brightness is everywhere consistent.
In the present embodiment, the height of each diffusion particle 20 is equal, and it is highly preferred within 30 to 50 microns.As a preferred version, diffusion particle 20 is formed, so the height of diffusion particle 20 depends on the thickness of photoresistance through overexposure, development by photoresistance.In practical operation, can arrange the thickness of photoresistance as the case may be, then formed diffusion particle 20 also can have corresponding height.
The diffusion sheet that the embodiment of the present invention provides comprises base material 1, diffusion layer 2 and antistatic protection layer 3, and wherein diffusion layer 2 is made up of a lot of diffusion particles 20, and diffusion particle 20 is directly formed at the upper surface of base material 1.In the embodiment of the present invention, the upper surface of diffusion particle 20 is plane, and its cross section is inverted trapezoidal, thus can effectively reflect light and reflect, and to provide a uniform area source, liquid crystal display brightness is everywhere consistent.
In addition, in the present embodiment, what diffusion particle 20 was neat is arranged on base material 1, and the height of each diffusion particle 20 is equal, therefore the upper surface of each diffusion particle 20 is positioned at same plane, thus can avoid other opticses such as diffusion layer 2 scratch light guide plate.
It should be noted that in the embodiment of the present invention, is that the diffusion sheet with most simple structure is described.In other embodiments, the diffusion sheet of other structures also can have the diffuse layer structure in the embodiment of the present invention.
The embodiment of the present invention additionally provides the manufacture method of above-mentioned diffusion sheet, comprising:
S1: be coated with one deck photoresistance at the upper surface of base material.
Wherein, the high material of light transmission rate chosen by base material, is preferably PET, PC or PMMA, selects PET material in the present embodiment.Photoresistance in the present embodiment selects forward photoresistance, its by ultraviolet lighting to part can be dissolved in photoresistance developer solution, and not by ultraviolet lighting to part can not be dissolved in photoresistance developer solution.The thickness of photoresistance is preferably within 30 to 50 microns, and concrete thickness can be chosen according to actual conditions, thus the diffusion particle with corresponding height formed.
S2: place mask plate on photoresistance.
As shown in Figure 3, mask plate 4 comprises light transmission part and shading light part (in figure dash area).By the light transmission part of designed mask version 4 and the size and number of shading light part, the adjustment size of diffusion particle and the density of diffusion particle can be realized.
S3: utilize UV light permeability mask plate, photoresistance is exposed, develop.
Because the light transmission part area in mask plate is less, the light source sending ultraviolet light needs interval, distributes uniformly, and the light source sending ultraviolet light can be made like this to be similar to pointolite.As shown in Figure 3, the UV light permeability mask plate 4 that above-mentioned approximate pointolite 5 sends is radiated on photoresistance 21, and the cross section of the part be mapped to by ultraviolet lighting in photoresistance 21 is trapezoidal, then the cross section of the part be not mapped to by ultraviolet lighting is inverted trapezoidal.After exposure, utilize photoresistance developer solution, will be mapped to photoresistance by ultraviolet lighting and remove, the cross section of remaining photoresistance (i.e. diffusion particle) can be inverted trapezoidal.
In addition, by adjusting the light application time of ultraviolet light, the size of diffusion particle can also be adjusted.
S4: be heating and curing to remaining photoresistance, forms diffusion layer.
Remove mask plate, remaining photoresistance is heated, make it solidify, and the photoresistance after solidification is met light again and also can not be decomposed, thus form stable diffusion particle.
Further, the manufacture method of this diffusion sheet also comprises:
S5: at the lower surface coating antistatic protection layer of base material.
Antistatic protection layer can prevent base material and diffusion layer by damage by static electricity on the one hand.On the other hand, antistatic protection layer can also play a protective role to base material, prevents base material by the miscellaneous part scratch in backlight module, and causes the problem that the light transmission rate of base material reduces.
In the manufacture method of the diffusion sheet that the embodiment of the present invention provides, using photoresistance as starting material, utilize mask plate to expose it, develop, to realize forming diffusion particle on base material, thus can make in the mode of very simple possible the diffusion layer comprising a lot of diffusion particle, and this diffusion layer can effectively reflect light and reflect, to provide a uniform area source, liquid crystal display brightness is everywhere consistent.
In addition, in the manufacture method of the diffusion sheet that the embodiment of the present invention provides, the size and number of light transmission part and shading light part in designed mask version can be passed through, and by adjusting the light application time of ultraviolet light, adjustment diffusion particle size and density, make the flexible structure of diffusion particle, changeable, to adapt to different product demands.Further, the mask plate in the present embodiment can be reused, and saves the manufacturing cost of diffusion sheet.
Although embodiment disclosed in this invention is as above, the embodiment that described content just adopts for the ease of understanding the present invention, and be not used to limit the present invention.Technician in any the technical field of the invention; under the prerequisite not departing from spirit and scope disclosed in this invention; any amendment and change can be done what implement in form and in details; but scope of patent protection of the present invention, the scope that still must define with appending claims is as the criterion.
Claims (9)
1. a diffusion sheet, comprises base material and diffusion layer;
Described diffusion layer comprises multiple diffusion particle being formed at the upper surface of described base material, and the upper surface of described diffusion particle is plane.
2. diffusion sheet according to claim 1, is characterized in that, the cross section of described diffusion particle is inverted trapezoidal.
3. diffusion sheet according to claim 1, is characterized in that, the height of described diffusion particle is within 30 to 50 microns.
4. diffusion sheet according to claim 1, is characterized in that, described diffusion particle is formed through overexposure, development by photoresistance.
5. diffusion sheet according to claim 1, is characterized in that, the lower surface of described base material is formed with antistatic protection layer.
6. diffusion sheet according to claim 1, is characterized in that, the material of described base material is PET, PC or PMMA.
7. a manufacture method for diffusion sheet, comprising:
One deck photoresistance is coated with at the upper surface of base material;
Described photoresistance places mask plate;
Utilize mask plate described in UV light permeability, described photoresistance is exposed, developed;
Remaining photoresistance is heating and curing, forms diffusion layer.
8. method according to claim 7, is characterized in that, the thickness of described photoresistance is within 30 to 50 microns.
9. method according to claim 7, is characterized in that, also comprises:
At the lower surface coating antistatic protection layer of described base material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510472676.5A CN105093365A (en) | 2015-08-04 | 2015-08-04 | Diffusion sheet and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510472676.5A CN105093365A (en) | 2015-08-04 | 2015-08-04 | Diffusion sheet and manufacturing method thereof |
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| CN105093365A true CN105093365A (en) | 2015-11-25 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1447162A (en) * | 2002-03-25 | 2003-10-08 | 碧悠电子工业股份有限公司 | Reflect type light expander |
| TW200841044A (en) * | 2007-04-04 | 2008-10-16 | Coretronic Corp | High brightness diffusion plate |
| TW201027137A (en) * | 2008-11-21 | 2010-07-16 | Mntech Co Ltd | Optical sheet and backlight unit having the same |
| CN103675963A (en) * | 2013-11-25 | 2014-03-26 | 昆山永翔光电科技有限公司 | Optical diffusion film and production process thereof |
| US20140106122A1 (en) * | 2010-05-12 | 2014-04-17 | Dai Nippon Printing Co., Ltd | Optical layered body, method for producing optical layered body, polarizer and image display device |
| JP2015028537A (en) * | 2013-07-30 | 2015-02-12 | シャープ株式会社 | Light-diffusing member and method for manufacturing the same, and display device |
-
2015
- 2015-08-04 CN CN201510472676.5A patent/CN105093365A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1447162A (en) * | 2002-03-25 | 2003-10-08 | 碧悠电子工业股份有限公司 | Reflect type light expander |
| TW200841044A (en) * | 2007-04-04 | 2008-10-16 | Coretronic Corp | High brightness diffusion plate |
| TW201027137A (en) * | 2008-11-21 | 2010-07-16 | Mntech Co Ltd | Optical sheet and backlight unit having the same |
| US20140106122A1 (en) * | 2010-05-12 | 2014-04-17 | Dai Nippon Printing Co., Ltd | Optical layered body, method for producing optical layered body, polarizer and image display device |
| JP2015028537A (en) * | 2013-07-30 | 2015-02-12 | シャープ株式会社 | Light-diffusing member and method for manufacturing the same, and display device |
| CN103675963A (en) * | 2013-11-25 | 2014-03-26 | 昆山永翔光电科技有限公司 | Optical diffusion film and production process thereof |
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Application publication date: 20151125 |
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