CN110161603B - Oriented diffusion microstructured optical film - Google Patents
Oriented diffusion microstructured optical film Download PDFInfo
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- CN110161603B CN110161603B CN201910476802.2A CN201910476802A CN110161603B CN 110161603 B CN110161603 B CN 110161603B CN 201910476802 A CN201910476802 A CN 201910476802A CN 110161603 B CN110161603 B CN 110161603B
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- optical film
- microstructure
- diffusion
- shaped groove
- angle trapezoidal
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0231—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having microprismatic or micropyramidal shape
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optical Elements Other Than Lenses (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses an optical film with a directional diffusion microstructure, which comprises a PET (polyethylene terephthalate) resin base material and a PMMA (polymethyl methacrylate) layer fixed on the surface of the PET resin base material, wherein the PMMA layer is pressed to form a plurality of V-shaped groove structures sequentially arranged from left to right; the V-shaped groove structure is formed by two right-angle trapezoidal microstructures symmetrically, and the oblique sides of the two right-angle trapezoidal microstructures are arranged in opposite directions. The problem of to some special purpose's liquid crystal display device, for example on-vehicle display, in order to improve people's viewing effect, light mostly need deflect, makes its both sides of concentrating on the LCD screen normal is solved.
Description
Technical Field
The invention relates to the field of optical films, in particular to an optical film with a directional diffusion microstructure.
Background
Currently, in the technology of liquid crystal display backlights, optical films have important roles, such as for light uniformization, reflection, and brightness enhancement. The optical film used in the liquid crystal display backlight source technology mainly comprises a diffusion film, a reflection film and a brightness enhancement film. Wherein the diffusion film is used for diffusing light, and the emergent angle of the light is enlarged, so that the brightness uniformity of the liquid crystal display can be improved by using the diffusion film. Generally, a diffusion film can realize diffusion of light, however, most of the light is concentrated near the normal line of the liquid crystal panel. However, for some special purpose liquid crystal display devices, such as vehicle-mounted displays, to improve the viewing effect of people, most of the light needs to be deflected to be concentrated on two sides of the normal of the liquid crystal screen, similar to the brightness distribution of "batwing", so that the microstructure of the diffusion film needs to be designed to realize the effect of diffusing towards two specific directions.
Therefore, it is an urgent need to provide an oriented diffusion microstructure optical film that can realize a brightness distribution similar to a "batwing" of a liquid crystal display device, i.e., oriented diffusion, and increase the outgoing light rays from the liquid crystal display device on both sides of the normal line, thereby increasing the brightness.
Disclosure of Invention
The invention aims to provide an oriented diffusion microstructure optical film, which solves the problem that most of light rays need to be deflected to be concentrated on two sides of a normal line of a liquid crystal screen in order to improve the viewing effect of people for liquid crystal display devices with special purposes, such as vehicle-mounted displays.
In order to achieve the purpose, the invention provides an oriented diffusion microstructure optical film which comprises a PET resin substrate and a PMMA layer fixed on the surface of the PET resin substrate, wherein the PMMA layer is pressed to form a plurality of V-shaped groove structures sequentially arranged from left to right;
the V-shaped groove structure is formed by two right-angle trapezoidal microstructures symmetrically, and the oblique sides of the two right-angle trapezoidal microstructures are arranged in opposite directions.
Preferably, a plurality of the V-shaped groove structures are arranged at equal intervals from left to right.
Preferably, the distance between two adjacent V-shaped groove structures is 0.04-0.06 mm.
Preferably, the height of the right-angle trapezoidal microstructure is 0.08-0.1 mm.
Preferably, the length of the bottom side of the right-angle trapezoid microstructure is 0.11-0.14 mm.
Preferably, the bottom angle of the hypotenuse of the right trapezoid microstructure is 40-50 °.
According to the technical scheme, the invention provides an optical film with a directional diffusion microstructure, which comprises a PET (polyethylene terephthalate) resin substrate and a PMMA (polymethyl methacrylate) layer fixed on the surface of the PET resin substrate, wherein the PMMA layer is pressed to form a plurality of V-shaped groove structures sequentially arranged from left to right; the V-shaped groove structure is formed by symmetrically arranging two right-angle trapezoidal microstructures, and the inclined sides of the two right-angle trapezoidal microstructures are arranged oppositely; the oriented diffusion microstructure optical film provided by the invention has the advantages that through the design of the V-shaped groove structure, the liquid crystal display has two symmetrical light emitting directions, so that light is increased in the two directions, the brightness is increased, the brightness distribution similar to 'batwing' of the liquid crystal display device is realized, namely oriented diffusion, the oriented diffusion microstructure optical film can be widely applied to a vehicle-mounted display, and the viewing effect of human eyes is improved.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a block diagram of a directional diffusion microstructured optical film provided in accordance with the present invention;
FIG. 2 is a graph of spatial luminance distribution after light has been directed through an oriented diffusing microstructured optical film provided in example 1;
FIG. 3 is a graph of spatial luminance distribution after light has been directed through the directional diffusion microstructured optical film provided in example 2.
Description of the reference numerals
2-V type groove structure of 1-PET resin substrate
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, unless otherwise specified, the directional words included in the terms, such as "from left to right" and the like, merely represent the orientation of the term in a conventional use state or are colloquially known by those skilled in the art, and should not be construed as limiting the term.
As shown in fig. 1, the invention provides an oriented diffusion microstructure optical film, which includes a PET resin substrate 1 and a PMMA layer fixed on the surface of the PET resin substrate 1, wherein the PMMA layer is pressed to form a plurality of V-groove structures 2 sequentially arranged from left to right; the V-shaped groove structure 2 is formed by two right-angle trapezoidal microstructures symmetrically, and the oblique sides of the two right-angle trapezoidal microstructures are arranged in opposite directions. The oriented diffusion microstructure optical film provided by the invention has the advantages that through the design of the V-shaped groove structure, the liquid crystal display has two symmetrical light emitting directions, so that light is increased in the two directions, the brightness is increased, the brightness distribution similar to 'batwing' of the liquid crystal display device is realized, namely oriented diffusion, the oriented diffusion microstructure optical film can be widely applied to a vehicle-mounted display, and the viewing effect of human eyes is improved.
In a preferred embodiment of the present invention, in order to further increase the brightness of the display, so that the liquid crystal display has two symmetrical light emitting directions, a plurality of the V-groove structures 2 are arranged at equal intervals from left to right.
In a preferred embodiment of the present invention, in order to further increase the brightness of the display, the distance between two adjacent V-groove structures 2 is 0.04-0.06mm, so that the liquid crystal display has two symmetrical light-emitting directions.
In a preferred embodiment of the present invention, in order to further increase the brightness of the display, the liquid crystal display has two symmetrical light-emitting directions, and the height of the right-angle trapezoid microstructure is 0.08-0.1 mm.
In a preferred embodiment of the present invention, in order to further increase the brightness of the display, the liquid crystal display has two symmetrical light-emitting directions, and the length of the bottom side of the right-angle trapezoid microstructure is 0.11-0.14 mm.
In a preferred embodiment of the present invention, in order to further increase the brightness of the display, the liquid crystal display has two symmetrical light-emitting directions, and the bottom angle of the hypotenuse of the right-angle trapezoid microstructure is 40-50 °.
The following is a detailed description of 2 sets of examples.
Example 1
A schematic structural diagram of an optical film with a directional diffusion microstructure is shown in FIG. 1, wherein a PMMA layer is coated on one surface of a PET resin substrate 1, and the PMMA layer is manufactured by imprinting to form a V-shaped groove structure 2. The V-shaped groove structure 2 is composed of two identical right-angle trapezoidal microstructures, is in the same plane and is symmetrically designed. The height of the right trapezoid microstructure is 0.095mm, the length of the bottom edge of the right trapezoid microstructure is 0.125mm, the angle of the bottom angle of the bevel edge of the right trapezoid microstructure is 45 degrees, and the distance between the adjacent V-shaped groove structures is 0.05 mm. The right-angle trapezoid microstructure can deflect light rays towards one side of a normal line, and the symmetrically designed V-shaped groove structure can enable the light rays to directionally diffuse towards two symmetrical directions. Therefore, the light-emitting surfaces of the microstructure are in two symmetrical directions, and light rays are increased in the two directions, so that the brightness is increased. When the invention is used in the liquid crystal display backlight source technology, the emergent light rays of the liquid crystal display device in two symmetrical directions are increased, the brightness is increased, the brightness distribution similar to 'batwing' is presented, and the aim of directional diffusion is achieved. The spatial brightness distribution diagram of the light passing through the directional diffusion microstructure optical film prepared in this embodiment is shown in fig. 2, and the spatial brightness distribution is "batwing" type, and the light is mainly concentrated on both sides of the normal line. The results show that the optical film in example 1 achieved the purpose of directional diffusion.
Example 2
A schematic structural diagram of an optical film with a directional diffusion microstructure is shown in FIG. 3, wherein a PMMA layer is coated on one surface of a PET resin substrate 1, and the PMMA layer is manufactured by imprinting to form a V-shaped groove structure 2. The V-shaped groove structure 2 is composed of two identical right-angle trapezoidal microstructures, is in the same plane and is symmetrically designed. The height of the right trapezoid microstructure is 0.08mm, the length of the bottom edge of the right trapezoid microstructure is 0.11mm, the angle of the bottom angle of the bevel edge of the right trapezoid microstructure is 49 degrees, and the distance between the adjacent V-shaped groove structures 2 is 0.051 mm. The right-angle trapezoid micro structure can deflect light rays towards one side of a normal line, and the V-shaped groove structure 2 in the symmetrical design can enable the light rays to directionally diffuse towards two symmetrical directions. Therefore, the light-emitting surfaces of the microstructure are in two symmetrical directions, and light rays are increased in the two directions, so that the brightness is increased. When the invention is used in the liquid crystal display backlight source technology, the emergent light rays of the liquid crystal display device in two symmetrical directions are increased, the brightness is increased, the brightness distribution similar to 'batwing' is presented, and the aim of directional diffusion is achieved. The spatial brightness distribution diagram of the light passing through the directional diffusion microstructure optical film prepared in this embodiment is shown in fig. 3, and the spatial brightness distribution is "batwing" type, and the light is mainly concentrated on both sides of the normal line. The results show that the optical film in example 2 achieves the purpose of directional diffusion.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (6)
1. The oriented diffusion microstructure optical film is characterized by comprising a PET (polyethylene terephthalate) resin base material (1) and a PMMA (polymethyl methacrylate) layer fixed on the surface of the PET resin base material (1), wherein the PMMA layer is pressed to form a plurality of V-shaped groove structures (2) which are sequentially arranged from left to right;
the V-shaped groove structure (2) is formed by two right-angle trapezoidal microstructures symmetrically, and the oblique sides of the two right-angle trapezoidal microstructures are arranged in opposite directions.
2. A directional-diffusing microstructured optical film according to claim 1, wherein a plurality of the V-groove structures (2) are equally spaced from left to right.
3. A directional-diffusing microstructured optical film according to claim 2, wherein the distance between two adjacent V-groove structures (2) is 0.04-0.06 mm.
4. The directional diffusion microstructured optical film of claim 1, wherein the right angle trapezoidal microstructures have a height of 0.08mm to 0.1 mm.
5. The film of claim 1, wherein the right angle trapezoidal microstructures have a base length of 0.11mm to 0.14 mm.
6. The directional diffusion microstructured optical film of claim 1, wherein the hypotenuse base angle of the right angle trapezoidal microstructure is between 40 ° and 50 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910476802.2A CN110161603B (en) | 2019-06-03 | 2019-06-03 | Oriented diffusion microstructured optical film |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910476802.2A CN110161603B (en) | 2019-06-03 | 2019-06-03 | Oriented diffusion microstructured optical film |
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| CN110161603A CN110161603A (en) | 2019-08-23 |
| CN110161603B true CN110161603B (en) | 2021-06-15 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210215971A1 (en) * | 2019-08-29 | 2021-07-15 | Hefei Xinsheng Optoelectronics Technology Co., Ltd. | Polarizer, display panel and display device |
| CN113934057A (en) * | 2021-10-28 | 2022-01-14 | 武汉华星光电技术有限公司 | Display device |
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| WO2014205027A1 (en) * | 2013-06-19 | 2014-12-24 | Bright View Technologies Corporation | Microstructure-based optical diffusers for creating batwing and other lighting patterns |
| CN105020674A (en) * | 2014-04-29 | 2015-11-04 | 财团法人工业技术研究院 | Light source device |
| CN106662794A (en) * | 2014-06-26 | 2017-05-10 | 皇家飞利浦有限公司 | Led lighting unit |
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| CN1766704A (en) * | 2004-10-29 | 2006-05-03 | 清华大学 | Light guide panel and surface emitting device |
| CN101796344B (en) * | 2007-09-10 | 2012-07-25 | 夏普株式会社 | Backlight |
| JP2010054995A (en) * | 2008-08-29 | 2010-03-11 | Toppan Printing Co Ltd | Lens sheet, backlight unit and display apparatus |
| CN202008539U (en) * | 2011-03-04 | 2011-10-12 | 常州市欧密格电子科技有限公司 | Light guide plate of digital camera |
| TWI470319B (en) * | 2011-07-05 | 2015-01-21 | Chi Mei Materials Technology Corp | Liquid crystal display |
| CN106896575B (en) * | 2017-03-03 | 2020-05-01 | 京东方科技集团股份有限公司 | Double-vision display microstructure, optical film using same and liquid crystal display module |
| CN108008576B (en) * | 2018-01-02 | 2020-11-06 | 京东方科技集团股份有限公司 | Diffusion sheet and manufacturing method thereof, backlight module and display device |
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2019
- 2019-06-03 CN CN201910476802.2A patent/CN110161603B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202852682U (en) * | 2011-09-20 | 2013-04-03 | 美蓓亚株式会社 | Light distribution control component and lighting device using same |
| WO2014205027A1 (en) * | 2013-06-19 | 2014-12-24 | Bright View Technologies Corporation | Microstructure-based optical diffusers for creating batwing and other lighting patterns |
| CN103984048A (en) * | 2013-07-30 | 2014-08-13 | 友达光电股份有限公司 | Optical diaphragm and display device containing same |
| CN105020674A (en) * | 2014-04-29 | 2015-11-04 | 财团法人工业技术研究院 | Light source device |
| CN106662794A (en) * | 2014-06-26 | 2017-05-10 | 皇家飞利浦有限公司 | Led lighting unit |
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| CN110161603A (en) | 2019-08-23 |
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