CN112130375B - Non-diffraction brightening prism sheet and display screen - Google Patents
Non-diffraction brightening prism sheet and display screen Download PDFInfo
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- CN112130375B CN112130375B CN202011013876.1A CN202011013876A CN112130375B CN 112130375 B CN112130375 B CN 112130375B CN 202011013876 A CN202011013876 A CN 202011013876A CN 112130375 B CN112130375 B CN 112130375B
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- 238000005282 brightening Methods 0.000 title claims description 5
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000001681 protective effect Effects 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000758 substrate Substances 0.000 claims description 20
- 239000004973 liquid crystal related substance Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 210000002858 crystal cell Anatomy 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 claims description 6
- 230000002708 enhancing effect Effects 0.000 claims description 4
- 229920000178 Acrylic resin Polymers 0.000 claims description 3
- 239000004925 Acrylic resin Substances 0.000 claims description 3
- 229920007962 Styrene Methyl Methacrylate Polymers 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- ADFPJHOAARPYLP-UHFFFAOYSA-N methyl 2-methylprop-2-enoate;styrene Chemical compound COC(=O)C(C)=C.C=CC1=CC=CC=C1 ADFPJHOAARPYLP-UHFFFAOYSA-N 0.000 claims description 3
- 229920005668 polycarbonate resin Polymers 0.000 claims description 3
- 239000004431 polycarbonate resin Substances 0.000 claims description 3
- 229920005990 polystyrene resin Polymers 0.000 claims description 3
- 230000001902 propagating effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims 1
- 238000003825 pressing Methods 0.000 abstract description 4
- 238000001125 extrusion Methods 0.000 abstract description 2
- 238000005192 partition Methods 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001795 light effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Classifications
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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
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
- G02B5/045—Prism arrays
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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)
Abstract
The invention relates to a non-diffraction brightness enhancement prism sheet and a display screen. The prism sheet enables the position of the prism to be continuously changed along the extending direction of the prism, and the coprime among the parameters is set, so that the probability of diffraction generated after the display is assembled is greatly reduced; in addition, the directions of the prisms are parallel, so that the consistency of light ray adjustment angles is ensured, and the later display dimming difficulty is reduced; because the existing scribing method is difficult to manufacture the prism sheet structure of the invention, a pressing method is innovatively used for preparing the prism sheet, and cold water is filled in a roller during manufacturing, so that a pressed area can be cooled and formed in the pressing process, the temperature of the non-pressed position is kept, and the manufacturing of the prism sheet is realized. And a hard protective film is arranged on the top of the prism sheet when the display screen is assembled, so that mutual extrusion and friction damage during assembly are reduced.
Description
Technical Field
The invention relates to the field of liquid crystal displays, in particular to a non-diffraction brightness enhancement prism sheet.
Background
Prism sheets (Prism sheets), also called Brightness Enhancement Films (BEFs), are important components of liquid crystal displays. Mainly uses the law of total reflection and refraction to concentrate the dispersed light into a certain angle range for emitting, thereby increasing the brightness in the range. The early prism sheet has a plurality of prisms formed in parallel, but since some diffraction occurs between the prisms and the liquid crystal pixels, the latter prism sheet employs a profile prism sheet, such as a spiral prism sheet as shown in fig. 1. Such prism sheets are generally formed by scribing a material surface using a scribing apparatus.
For example, application No.: CN200710201803.3, which discloses a backlight module and a liquid crystal panel disposed above the backlight module, wherein the backlight module includes a reflective plate, a plurality of light sources, a diffuser plate and a prism sheet sequentially disposed above the reflective plate, the prism sheet includes a transparent substrate, the transparent substrate has a light incident surface and a light emergent surface opposite to the light incident surface, the light emergent surface is formed with a plurality of strip-shaped V-shaped protrusions extending in a bending manner, and the plurality of strip-shaped V-shaped protrusions extend along a plurality of parallel circular arc lines with equal curvature. For another example, application number CN201810686302.7 discloses a prism sheet, a bidirectional prism assembly and a display device having the same, the bidirectional prism assembly includes two prism sheets, each prism sheet is divided into a plurality of partitions, each partition has a sawtooth-shaped sub-prism located on the same side surface of the prism sheet, the setting direction of the sub-prisms in the adjacent partitions of the same prism sheet has a first included angle, the setting direction of the sub-prisms of the partition corresponding to each other and corresponding to each other in the thickness direction of the prism sheet have a second included angle, and each extending direction of the sub-prisms and the length direction of the prism sheet have acute included angles. Therefore, the deformation of the prism sheet in expansion and contraction deformation can be effectively prevented from being overlarge, the deformation of the prism sheet in reliability test can be better reduced, and the light effect in the visual angle range can be better ensured by the arrangement of the second included angle.
Although the above solution can reduce diffraction to some extent, whether it is a curved type or an interlaced type, the angle between prisms at different positions is greatly changed, so that the effect of adjusting the light angle is different at different positions, which affects the later dimming of the whole display.
Disclosure of Invention
In view of the above, to solve the above problems, there is provided a non-diffractive brightness enhancement prism sheet, which includes a lower bottom and an upper end, wherein the lower bottom is flat, and the upper end is located on the upper surface of the lower bottom and is integrally formed with the lower bottom; the upper end comprises a plurality of elongated convex prisms with triangular sections, so that part of light rays propagating upwards from the lower bottom are refracted and transmitted through the prism sheet to be emitted from the upper end, and part of light rays are totally reflected by the prisms and then emitted from the lower bottom;
the extending directions of the tips of all the prisms at the upper end part are all parallel to each other, the length along the extending direction of the tips of the prisms is defined as the length of the prisms, the distance between two end points of a triangle formed by the cross section of the prisms and the lower bottom part is the width of the prisms, and the ratio of the length to the width of the prisms is 2-5: 1;
after each prism length is extended along the extending direction of the prism tip, the extending line of the prism tip is shifted by a distance of d micrometers along the direction vertical to the extending line of the prism tip, and then the extending line is extended for one prism length; so that the prism sheet is composed of a plurality of prisms in both the lateral and longitudinal directions, but the directions in which the tips of the prisms extend are all parallel to each other.
Defining the distance between the tips of two adjacent prisms on the cross section of the prism sheet as w micrometers, and defining the pixel distance of the liquid crystal panel as s micrometers; the values of w, s and d are set, so that the three values of w, s and d are prime numbers, and the probability of diffraction generated after the prism sheet is installed is reduced.
In addition, the method for manufacturing the non-diffraction brightness enhancement prism sheet comprises the following steps:
step 4, injecting low-temperature liquid into the roller, and then rolling the roller on the surface of the base material film once to form a row of prisms on the surface of the base material film, wherein the prisms are cooled and formed; then the roller is transversely moved, and the roller is regulated to roll once again, so that the prism formed by rolling for the second time is contacted with the prism formed by rolling for the first time, and the distance between the extending lines of the tips of the prisms is d micrometers; and then repeatedly rolled several times to obtain the prism sheet.
Further the cryogenic liquid is water.
Providing a non-diffractive display screen having the non-diffractive brightness enhancing prism sheet;
the display screen has the diffraction-free brightening prism sheet that two-layer mutually perpendicular set up, and the display screen still includes:
the liquid crystal cell, the diffusion plate, the light guide plate and the backlight source; the display screen is provided with a liquid crystal cell, a first prism sheet, a second prism sheet, a diffusion plate, a light guide plate and a backlight source from top to bottom in sequence.
The upper end of the prism sheet is provided with a hard protective film layer during assembly, and the prism sheet and the hard protective film layer do not have relative displacement.
The beneficial effects of the invention are as follows:
the prism sheet of the invention enables the position of the prism to be continuously changed along the extending direction of the prism, and the coprime among the parameters is set, thereby greatly reducing the probability of diffraction after the prism is assembled into a display; in addition, the directions of the prisms are parallel, so that the consistency of light ray adjustment angles is ensured, and the later display dimming difficulty is reduced; because the existing scribing method is difficult to manufacture the prism sheet structure, the invention creatively uses a pressing method to prepare the prism sheet, and cold water is filled in a roller during manufacturing, so that a pressed area can be cooled and formed in the pressing process, and the non-pressed position keeps the temperature, thereby realizing the manufacturing of the prism sheet. The invention also arranges a hard protective film on the top of the prism sheet when assembling the display screen, thereby reducing mutual extrusion and friction damage during assembling.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosed subject matter, are incorporated in and constitute a part of this specification. The drawings illustrate the implementations of the disclosed subject matter and, together with the detailed description, serve to explain the principles of implementations of the disclosed subject matter. No attempt is made to show structural details of the disclosed subject matter in more detail than is necessary for a fundamental understanding of the disclosed subject matter and various modes of practicing the same.
FIG. 1 is a schematic view of a prism sheet in the prior art;
FIG. 2 is a schematic view of a display screen;
FIG. 3 is a cross-sectional and top view of the prism sheet of the present invention;
FIG. 4 is a schematic diagram illustrating a prism sheet according to the present invention;
FIG. 5 is a schematic view of the manufacturing method of the present invention.
Detailed Description
The advantages, features and methods of accomplishing the same will become apparent from the drawings and the detailed description that follows.
Example 1:
3-4, a non-diffraction brightness enhancement prism sheet, the prism sheet comprises a lower bottom 1 and an upper end 2, the lower bottom 1 is flat, the upper end 2 is located on the upper surface of the lower bottom 1 and is integrated with the lower bottom 1; the upper end part 2 comprises a plurality of long-strip-shaped convex prisms with triangular sections, so that part of light rays propagating upwards from the lower bottom part 1 are emitted from the upper end part 2 through the prism sheet after being refracted and transmitted, and part of light rays are emitted from the lower bottom part 1 after being totally reflected by the prisms;
the extending directions of the tips of all the prisms of the upper end part 2 are all parallel to each other, the length along the extending direction of the tips of the prisms is defined as the length of the prisms, the distance between two end points of a triangle formed by the cross section of the prisms, which are contacted with the lower bottom part 1, is the width of the prisms, and the ratio of the length to the width of the prisms is 2-5: 1;
after each prism length is extended along the extending direction of the prism tip, the extending line of the prism tip is shifted by a distance of d micrometers along the direction vertical to the extending line of the prism tip, and then the extending line is extended for one prism length; so that the prism sheet is composed of a plurality of prisms in both the lateral and longitudinal directions, but the directions in which the tips of the prisms extend are all parallel to each other.
In fig. 3, the upper panel abcd is a sectional view taken at four cross-sectional lines of the lower panel abcd;
defining the distance between the tips of two adjacent prisms on the cross section of the prism sheet as w micrometers, and defining the pixel distance of the liquid crystal panel as s micrometers; the values of w, s and d are set, so that the three values of w, s and d are prime numbers, and the probability of diffraction generated after the prism sheet is installed is reduced.
Example 2:
as shown in fig. 5, a method for manufacturing a non-diffractive brightness enhancement prism sheet is provided, which comprises:
step 4, injecting low-temperature liquid into the roller 3, and then rolling the roller 3 on the surface of the base material film once to form a row of prisms on the surface of the base material film, wherein the prisms are cooled and formed; then the roller 3 is transversely moved, the roller 3 is regulated to roll once again, so that the prism formed by rolling for the second time is contacted with the prism formed by rolling for the first time, and the distance between the extending lines of the tips of the prisms is d micrometers; and then repeatedly rolled a plurality of times to obtain a prism sheet.
Further the cryogenic liquid is water.
Example 3:
providing a non-diffractive display screen, as shown in fig. 2, having the non-diffractive brightness enhancing prism sheet;
the display screen has the diffraction-free brightening prism sheet that two-layer mutually perpendicular set up, and the display screen still includes:
the liquid crystal cell, the diffusion plate, the light guide plate and the backlight source; the display screen is provided with a liquid crystal cell, a first prism sheet, a second prism sheet, a diffusion plate, a light guide plate and a backlight source from top to bottom in sequence.
The upper end 2 of the prism sheet is provided with a hard protective film layer during assembly, and the prism sheet and the hard protective film layer do not have relative displacement.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (5)
1. The prism sheet with the functions of diffraction prevention and brightness enhancement is characterized by comprising a lower bottom (1) and an upper end part (2), wherein the lower bottom (1) is in a flat plate shape, and the upper end part (2) is positioned on the upper surface of the lower bottom (1) and is integrally formed with the lower bottom (1); the upper end part (2) comprises a plurality of elongated convex prisms with triangular sections, so that part of light rays propagating upwards from the lower bottom part (1) are refracted, transmitted through the prism sheet and emitted from the upper end part (2), and part of light rays are totally reflected by the prisms and then emitted from the lower bottom part (1);
the extending directions of the tips of all the prisms of the upper end part (2) are all parallel to each other, the length along the extending direction of the tips of the prisms is defined as the length of the prisms, the distance between two end points of a triangle formed by the cross section of the prisms and the lower bottom part (1) is the width of the prisms, and the ratio of the length to the width of the prisms is 2-5: 1;
after each prism length is extended along the extending direction of the prism tip, the extending line of the prism tip is shifted by a distance of d micrometers along the direction vertical to the extending line of the prism tip, and then the extending line is extended for one prism length; so that the prism sheet is composed of a plurality of prisms in both the lateral and longitudinal directions, but the tip extending directions of the prisms are all parallel to each other;
defining the distance between the tips of two adjacent prisms on the cross section of the prism sheet as w micrometers, and defining the pixel distance of the liquid crystal panel as s micrometers; the values of w, s and d are set, so that the three values of w, s and d are prime numbers, and the probability of diffraction generated after the prism sheet is installed is reduced.
2. The method for manufacturing a non-diffractive brightness enhancing prism sheet according to claim 1, wherein:
step 1, providing a substrate film, wherein the substrate is at least one of polystyrene resin, acrylic resin, polycarbonate resin or styrene methyl methacrylate resin;
step 2, providing a roller (3), wherein the surface of the roller (3) is provided with a shape (4) complementary to the surface structure of the prism sheet, so that when the roller (3) rolls on the surface of the substrate film, a row of prisms can be formed on the surface of the substrate film, the roller (3) is of a hollow structure, and low-temperature liquid can be injected into the roller (3);
step 3, heating the substrate film to a preset temperature to soften the substrate;
step 4, injecting low-temperature liquid into the roller (3), and then rolling the roller (3) on the surface of the base material film once to form a row of prisms on the surface of the base material film, wherein the prisms are cooled and formed; then the roller (3) is transversely moved, the roller (3) is regulated to roll once again, so that the prism formed by rolling for the second time is contacted with the prism formed by rolling for the first time, and the distance between the extending lines of the tips of the prisms is d micrometers; and then repeatedly rolled several times to obtain the prism sheet.
3. The method of claim 2, wherein the cryogenic liquid is water.
4. A non-diffractive display screen having the non-diffractive brightness enhancing prism sheet of claim 1; the method is characterized in that: the display screen has the diffraction-free brightening prism sheet that two-layer mutually perpendicular set up, and the display screen still includes:
the liquid crystal cell, the diffusion plate, the light guide plate and the backlight source; the display screen is sequentially provided with a liquid crystal cell, a first prism sheet, a second prism sheet, a diffusion plate, a light guide plate and a backlight source from top to bottom;
the two layers of non-diffraction brightness enhancement prism sheets which are arranged vertically are a first prism sheet and a second prism sheet.
5. The non-diffractive display screen according to claim 4, wherein the prism sheet is provided with a hard protective film layer at the upper end (2) when assembled, and there is no relative displacement between the prism sheet and the hard protective film layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011013876.1A CN112130375B (en) | 2020-09-24 | 2020-09-24 | Non-diffraction brightening prism sheet and display screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011013876.1A CN112130375B (en) | 2020-09-24 | 2020-09-24 | Non-diffraction brightening prism sheet and display screen |
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| Publication Number | Publication Date |
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| CN112130375A CN112130375A (en) | 2020-12-25 |
| CN112130375B true CN112130375B (en) | 2022-07-01 |
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| CN202011013876.1A Active CN112130375B (en) | 2020-09-24 | 2020-09-24 | Non-diffraction brightening prism sheet and display screen |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113900170B (en) * | 2021-10-13 | 2023-09-19 | 安徽晟华光学科技有限公司 | High-brightness adsorption-resistant scratch-resistant prism film and preparation method thereof |
| CN113985641B (en) * | 2021-10-26 | 2023-12-01 | Tcl华星光电技术有限公司 | Color film substrate, display panel and manufacturing method of color film substrate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070008152A (en) * | 2005-07-13 | 2007-01-17 | 삼성전자주식회사 | Prism member and a backlight assembly provided with the same and a display device provided with the same |
| TW200827780A (en) * | 2006-10-27 | 2008-07-01 | Fujifilm Corp | Backlight unit |
| CN101529152A (en) * | 2006-10-27 | 2009-09-09 | 富士胶片株式会社 | Backlight unit |
| CN101825736A (en) * | 2009-03-03 | 2010-09-08 | 北京京东方光电科技有限公司 | Enhanced prism sheet |
-
2020
- 2020-09-24 CN CN202011013876.1A patent/CN112130375B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070008152A (en) * | 2005-07-13 | 2007-01-17 | 삼성전자주식회사 | Prism member and a backlight assembly provided with the same and a display device provided with the same |
| TW200827780A (en) * | 2006-10-27 | 2008-07-01 | Fujifilm Corp | Backlight unit |
| CN101529152A (en) * | 2006-10-27 | 2009-09-09 | 富士胶片株式会社 | Backlight unit |
| CN101825736A (en) * | 2009-03-03 | 2010-09-08 | 北京京东方光电科技有限公司 | Enhanced prism sheet |
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Denomination of invention: A Non diffracting Brightening Prism and Display Screen Effective date of registration: 20221107 Granted publication date: 20220701 Pledgee: Chizhou Jiuhua Hengxin financing Company limited by guarantee Pledgor: Anhui Shenghua Optical Technology Co.,Ltd. Registration number: Y2022980020914 |
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Date of cancellation: 20231225 Granted publication date: 20220701 Pledgee: Chizhou Jiuhua Hengxin financing Company limited by guarantee Pledgor: Anhui Shenghua Optical Technology Co.,Ltd. Registration number: Y2022980020914 |
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