CN105353441A - Light guide plate made of PMMA material and provided with light output surface with large round dot structures - Google Patents
Light guide plate made of PMMA material and provided with light output surface with large round dot structures Download PDFInfo
- Publication number
- CN105353441A CN105353441A CN201510776783.7A CN201510776783A CN105353441A CN 105353441 A CN105353441 A CN 105353441A CN 201510776783 A CN201510776783 A CN 201510776783A CN 105353441 A CN105353441 A CN 105353441A
- Authority
- CN
- China
- Prior art keywords
- light
- guide plate
- light guide
- hemisphere jut
- passing board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
Abstract
The invention provides a light guide plate made of a PMMA material and provided with a light output surface with large round dot structures. The light guide plate comprises a light passing plate; the light passing plate includes a light input surface, the light output surface and a bottom surface, wherein a light beam is guided into the light passing plate via the light input surface, the light beam is guided out of the light passing plate via the light output surface, and the bottom surface is opposite to the light output surface; the light passing plate is made of the PMMA material; and the light output surface of the light passing plate is provided with spherical projections which are molded with the light passing plate in an integrated manner, the diameter of each spherical projection ranges from 0.675 to 0.70mm, the height of the spherical projection ranges from 0.315 to 0.35mm, the spherical projections are uniformly distributed in rows, and the spacing between the two adjacent spherical projections ranges from 0.285 to 0.30mm. Parameters including the diameter, the height and the spacing of the spherical projections are optimized according to the different materials of the light guide plate, the light pass rate and the scattering effect of the light guide plate are improved, the luminance of a light source of the light output surface of the light guide plate is ensured, and the integral optical performance of a backlight system is improved.
Description
Technical field
The invention belongs to back light system technical field, particularly relate to a kind of light guide plate of back light system.
Background technology
Because the liquid crystal of liquid crystal display itself does not have the characteristics of luminescence, thus, for reaching display effect, a planar light source device need be provided to panel of LCD, as back light system, its role is to panel of LCD supply briliancy fully and the area source be evenly distributed.
The back light system of prior art forms primarily of light source, light guide plate, reflecting plate, diffuser plate and prism plate, this light source can be arranged on light guide plate side or two opposite sides and by light emission to this light guide plate, the effect of this light guide plate is to guide light transmission direction, makes light from the exiting surface uniform of light guide plate; The bottom surface of reflecting plate this light guide plate relative is arranged, and to be again reflected in this light guide plate by the light from bottom surface of light guide plate outgoing, improves the utilization factor of light; The exiting surface of diffuser plate light guide plate relative to prism plate sets gradually, more even to make from the distribution of light of light guide plate outgoing, and then improves briliancy and the homogeneity of panel of LCD.
In back light system, the effect of diffuser plate is to make the abundant scattering of the light beam of outgoing and reaching the homogenising of briliancy, but, in back light system, diffuser plate is set, material cost is high, and assembling process is complicated, expends man-hour and human cost, and between light guide plate and diffuser plate, there is transmission interface, a certain amount of light loss can be caused in this transmission interface, causes briliancy to reduce, and affects the overall optical property of back light system.In order to head it off, occur that one has diffusing light guiding plate at present, the exiting surface of light guide plate is provided with multiple hemisphere jut, by the arc-shaped curved surface of hemisphere jut, scattering is carried out to the light beam that exiting surface sends, to reach the object reducing back light system assembly cost and reduce light loss, but the deficiency that this light guide plate exists is: the diameter of hemisphere jut, the parameters such as height and spacing can directly affect the light percent of pass of light guide plate and the dispersion effect to light beam, but the light guide plate occurred at present is not optimized correlation parameter, therefore light percent of pass and dispersion effect poor.
Summary of the invention
The object of the invention is to solve the light percent of pass of light guide plate in prior art and the poor technical matters of dispersion effect, a kind of light percent of pass and the good light guide plate of dispersion effect are provided.
The technical scheme that technical solution problem of the present invention adopts is: provide a kind of light guide plate, comprise light-passing board, described light-passing board has the incidence surface imported by light beam in light-passing board, the exiting surface that light beam is derived in light-passing board and the bottom surface relative with exiting surface, described light-passing board adopts PMMA material, the exiting surface of described light-passing board is provided with multiple hemisphere jut integrated with light-passing board, the diameter of hemisphere jut is 0.675-0.70mm, the height of hemisphere jut is 0.315-0.35mm, described hemisphere jut is that ranks shape is uniformly distributed, spacing between adjacent two hemisphere juts is 0.285-0.30mm.
Hinge structure, light guide plate of the present invention, there is following beneficial effect: the exiting surface of light-passing board has multiple hemisphere jut, the arc-shaped curved surface of the plurality of hemisphere jut can carry out scattering to the light beam of certain ranges of incidence angles, make light guide plate itself have diffusion function, save the cost of required diffuser plate during assembling back light system; Hemisphere jut and light-passing board adopt same material simultaneously, and one-body molded, and therefore there is not light between hemisphere jut and light-passing board and transmit interface, light loss reduces; In addition, the present invention is optimized the diameter of hemisphere jut, the parameter such as height and spacing according to the difference of light guide plate material, improve light percent of pass and the dispersion effect of light guide plate, ensure that light guide plate sends the light source briliancy of area source, thus improve the overall optical property of back light system.
Accompanying drawing explanation
Fig. 1 is shown as the side view of light guide plate of the present invention.
Fig. 2 is shown as the distribution schematic diagram of light guide plate hemisphere jut of the present invention.
Fig. 3 is shown as light guide plate beam exit index path of the present invention.
Element numbers explanation
10-light-passing board; 11-incidence surface; 12-exiting surface; 13-bottom surface; 20-hemisphere jut.
Embodiment
By particular specific embodiment, embodiments of the present invention are described below, person skilled in the art scholar the content disclosed by this instructions can understand other advantages of the present invention and effect easily.
embodiment 1
As depicted in figs. 1 and 2, light guide plate of the present invention comprises light-passing board 10, and the shape of light-passing board 10 is plate shaped, and its material is transparent synthetic resin or glass.Light-passing board 10 comprises incidence surface 11, exiting surface 12 and bottom surface 13, wherein, incidence surface 11 is for the light beam that receives light source (not shown in FIG.) and send and imported in light-passing board 10, the light beam of incidence is derived light-passing board 10 by exiting surface 12, bottom surface 13 is minute surface, and bottom surface 13 and exiting surface 12 are oppositely arranged.
Exiting surface 11 is provided with multiple hemisphere jut 20, multiple hemisphere jut 20 is uniformly distributed on exiting surface 11 in ranks shape, and size is consistent.The material of light-passing board 10 adopts PMMA(PolyMethylMethAcrylate, polymethylmethacrylate), the material of hemisphere jut 20 also adopts PMMA, and light-passing board 10 is one-body molded with hemisphere jut 20, there is not light between such light-passing board 10 and hemisphere jut 20 and transmit interface, light loss reduces.The shape of hemisphere jut 20 is semisphere or Part-spherical (Part-spherical refers to the sphere structure that interface radian is less than 180 °).
The diameter of hemisphere jut 20 and height dimension should be moderate, cross the thickness that conference increases light guide plate, affect light percent of pass, too smallly can affect the dispersion effect of light guide plate to light beam, find through actual test, during light guide plate employing PMMA material, the diameter of hemisphere jut 20 is advisable at 0.675-0.70mm, and the height of hemisphere jut 20 is advisable at 0.315-0.35mm; In addition, spacing between hemisphere jut 20 should be moderate, spacing is crossed conference and the quantity of hemisphere jut is reduced, affect the dispersion effect of light guide plate to light beam, the too small meeting of spacing makes generation between light beam mutually interfere, and finds through reality test, during light guide plate employing PMMA material, if hemisphere jut 20 is distribution in ranks shape, the spacing between two adjacent hemisphere juts of colleague or same column is advisable at 0.285-0.30mm.
In the present embodiment, hemisphere jut 20 is Part-spherical, and the diameter of hemisphere jut 20 is 0.675mm, and the height of hemisphere jut 20 is 0.315mm, and the spacing between two adjacent hemisphere juts 20 of colleague or same column is 0.285mm.
As shown in Figure 3, when the exiting surface 12 as light-passing board 10 does not arrange hemisphere jut, incident with a angle relative to the exiting surface of light-passing board 10 by the light beam 30 of bottom surface 13 scattering and reflection, when a angle is less than the angle of total reflection, this light beam 30 through exiting surface 12 with the outgoing of b angle.The present embodiment arranges hemisphere jut 20 at the exiting surface of light-passing board 10, then this light beam 30 is after the arc-shaped curved surface total reflection of hemisphere jut 20, and opposing arcuate curved surface is incident with c angle again, when c angle is less than the angle of total reflection, light beam 30 through arc-shaped curved surface with the outgoing of d angle.This light beam 30 is n(n>1 by refractive index) high refractive index medium light guide plate enters the air dielectric that refractive index is 1, formula is: n=sini/sinr, wherein, n is the refractive index of high refractive index medium, n>1, i is emergence angle, r is incident angle, known, light beam 30 be greater than with the angle of perpendicular line after arc-shaped curved surface outgoing light beam 30 after exiting surface outgoing with the angle of perpendicular line, namely the exiting surface of the relative light-passing board 10 of the arc-shaped curved surface of hemisphere jut 20 has astigmatism functions within the scope of certain angle, this ranges of incidence angles depends on the factor such as the refractive index of PMMA material and the radian of arc-shaped curved surface.Meanwhile, when hemisphere jut diameter is certain, the radian of arc-shaped curved surface increases gradually, then the height protruded is deepened gradually, and the emergence angle of light beam 30 will increase gradually, and dispersion effect also will be more remarkable.
embodiment 2
The present embodiment is substantially identical with the structure of embodiment 1, difference is: hemisphere jut 20 is semisphere, the diameter of hemisphere jut 20 is 0.68mm, and the height of hemisphere jut 20 is 0.34mm, and the spacing between two adjacent hemisphere juts 20 of colleague or same column is 0.29mm.
embodiment 3
The present embodiment is substantially identical with the structure of embodiment 1, difference is: hemisphere jut 20 is semisphere, the diameter of hemisphere jut 20 is 0.70mm, and the height of hemisphere jut 20 is 0.35mm, and the spacing between two adjacent hemisphere juts of colleague or same column is 0.30mm.
Present invention also offers a kind of back light system, this back light system have employed above-mentioned light guide plate, light guide plate has multiple hemisphere jut 20, the arc-shaped curved surface of the plurality of hemisphere jut can carry out scattering to the light beam of certain ranges of incidence angles, make light guide plate itself have diffusion function, save the cost of required diffuser plate during assembling back light system; Hemisphere jut and light-passing board adopt same material simultaneously, and one-body molded, and therefore there is not light between hemisphere jut and light-passing board and transmit interface, light loss reduces; In addition, the present invention is optimized the diameter of hemisphere jut, the parameter such as height and spacing according to the difference of light guide plate material, improve light percent of pass and the dispersion effect of light guide plate, ensure that light guide plate sends the light source briliancy of area source, thus improve the overall optical property of back light system.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (4)
1. one kind adopts PMMA material and exiting surface has the light guide plate of large circle point structure, comprise light-passing board, described light-passing board has the incidence surface imported by light beam in light-passing board, the exiting surface that light beam is derived in light-passing board and the bottom surface relative with exiting surface, it is characterized in that: described light-passing board adopts PMMA material, the exiting surface of described light-passing board is provided with multiple hemisphere jut integrated with light-passing board, the diameter of hemisphere jut is 0.675-0.70mm, the height of hemisphere jut is 0.315-0.35mm, described hemisphere jut is that ranks shape is uniformly distributed, spacing between adjacent two hemisphere juts is 0.285-0.30mm.
2. a kind of PMMA of employing material according to claim 1 and exiting surface have the light guide plate of large circle point structure, it is characterized in that: the shape of described hemisphere jut is semisphere or Part-spherical.
3. a kind of PMMA of employing material according to claim 1 and exiting surface have the light guide plate of large circle point structure, it is characterized in that: the size of described hemisphere jut is consistent.
4. a back light system, comprises light guide plate, it is characterized in that: described light guide plate adopts the light guide plate according to any one of claim 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510776783.7A CN105353441A (en) | 2015-11-13 | 2015-11-13 | Light guide plate made of PMMA material and provided with light output surface with large round dot structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510776783.7A CN105353441A (en) | 2015-11-13 | 2015-11-13 | Light guide plate made of PMMA material and provided with light output surface with large round dot structures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105353441A true CN105353441A (en) | 2016-02-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510776783.7A Pending CN105353441A (en) | 2015-11-13 | 2015-11-13 | Light guide plate made of PMMA material and provided with light output surface with large round dot structures |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105353441A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110352319A (en) * | 2016-11-18 | 2019-10-18 | 康宁股份有限公司 | Micro-structural light guide plate and device comprising it |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10233113A (en) * | 1997-02-18 | 1998-09-02 | Fujitsu Ltd | Surface light source device |
| CN2588388Y (en) * | 2002-12-28 | 2003-11-26 | 鸿富锦精密工业（深圳）有限公司 | Light conducting board device |
| CN201100868Y (en) * | 2007-10-30 | 2008-08-13 | 天瑞企业股份有限公司 | Light-guiding plate |
| CN101994995A (en) * | 2009-08-21 | 2011-03-30 | 喜星电子株式会社 | Light guide board and side lighting backlight source device using the same |
| CN102928911A (en) * | 2012-10-26 | 2013-02-13 | 京东方科技集团股份有限公司 | Light guide plate and manufacturing method of light guide plate as well as backlight module and display device |
| CN103901524A (en) * | 2012-12-27 | 2014-07-02 | 鸿富锦精密工业（深圳）有限公司 | Light guide plate and manufacturing method thereof |
| CN204345537U (en) * | 2015-01-15 | 2015-05-20 | 安徽彩晶光电有限公司 | A kind of LED light guide plate |
| CN104903641A (en) * | 2012-12-05 | 2015-09-09 | 住友化学株式会社 | Light guide plate, planar light source apparatus, transmissive image display apparatus, and light guide plate manufacturing method |
-
2015
- 2015-11-13 CN CN201510776783.7A patent/CN105353441A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10233113A (en) * | 1997-02-18 | 1998-09-02 | Fujitsu Ltd | Surface light source device |
| CN2588388Y (en) * | 2002-12-28 | 2003-11-26 | 鸿富锦精密工业（深圳）有限公司 | Light conducting board device |
| CN201100868Y (en) * | 2007-10-30 | 2008-08-13 | 天瑞企业股份有限公司 | Light-guiding plate |
| CN101994995A (en) * | 2009-08-21 | 2011-03-30 | 喜星电子株式会社 | Light guide board and side lighting backlight source device using the same |
| CN102928911A (en) * | 2012-10-26 | 2013-02-13 | 京东方科技集团股份有限公司 | Light guide plate and manufacturing method of light guide plate as well as backlight module and display device |
| CN104903641A (en) * | 2012-12-05 | 2015-09-09 | 住友化学株式会社 | Light guide plate, planar light source apparatus, transmissive image display apparatus, and light guide plate manufacturing method |
| CN103901524A (en) * | 2012-12-27 | 2014-07-02 | 鸿富锦精密工业（深圳）有限公司 | Light guide plate and manufacturing method thereof |
| CN204345537U (en) * | 2015-01-15 | 2015-05-20 | 安徽彩晶光电有限公司 | A kind of LED light guide plate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110352319A (en) * | 2016-11-18 | 2019-10-18 | 康宁股份有限公司 | Micro-structural light guide plate and device comprising it |
| US11092733B2 (en) | 2016-11-18 | 2021-08-17 | Corning Incorporated | Microstructured light guide plates and devices comprising the same |
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Application publication date: 20160224 |
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