CN101424754B - Diffusion plate and diffuser plate set - Google Patents
Diffusion plate and diffuser plate set Download PDFInfo
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- CN101424754B CN101424754B CN2007101820934A CN200710182093A CN101424754B CN 101424754 B CN101424754 B CN 101424754B CN 2007101820934 A CN2007101820934 A CN 2007101820934A CN 200710182093 A CN200710182093 A CN 200710182093A CN 101424754 B CN101424754 B CN 101424754B
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- diffuser plate
- arc
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- light
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- 238000009792 diffusion process Methods 0.000 title abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 12
- 235000003283 Pachira macrocarpa Nutrition 0.000 claims description 6
- 241001083492 Trapa Species 0.000 claims description 6
- 235000014364 Trapa natans Nutrition 0.000 claims description 6
- -1 polypropylene Polymers 0.000 claims description 6
- 235000009165 saligot Nutrition 0.000 claims description 6
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000004793 Polystyrene Substances 0.000 claims description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical group C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 3
- HGAZMNJKRQFZKS-UHFFFAOYSA-N chloroethene;ethenyl acetate Chemical compound ClC=C.CC(=O)OC=C HGAZMNJKRQFZKS-UHFFFAOYSA-N 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 3
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229920002521 macromolecule Polymers 0.000 description 4
- 235000019994 cava Nutrition 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The invention relates to a diffusion plate, which is mainly made of a light-transmitting material. The light-emitting surface of the diffusion plate is provided with a plurality of strip-shaped patterns, the outlines of the patterns are provided with a first arc and a second arc, and the protruding directions of the first arc and the second arc are opposite to each other. Wherein, the second arc is a circular arc and the curvature radius is between 0.05mm and 0.3 mm.
Description
Technical field
What the present invention relates to is a kind of diffuser plate and diffuser plate group, particularly be a kind of pattern that on exiting surface, has a plurality of strips diffuser plate with have the diffuser plate group of this diffuser plate.
Background technology
In recent years, traditional cathode-ray tube display (CRT monitor that promptly is commonly called as) is replaced by LCD gradually, main cause is that the radiant quantity that LCD discharges is far smaller than CRT monitor, and LCD also shows the reduction that lands in this manufacturing cost in several years.In general, LCD comprises backlight module and liquid crystal panel two large divisions, and the main function of backlight module is to provide the light source liquid crystal display to use.
In general, in backlight module, generally included a diffuser plate, this diffuser plate is made of the macromolecule light-transmitting materials that is doped with a plurality of smooth diffusion particles, its function is that the light that cathode fluorescent tube is sent spreads, with the influence of the minimizing bright shadow that cathode fluorescent tube was produced to display quality.If do not have this diffuser plate, then just can produce the light and shade band on the display surface.In early days, diffuser plate is mainly slab construction, but along with development of technology, the someone develops the diffuser plate that is formed with pattern (pattern) on exiting surface, so that the better raising of display quality.
Please refer to Fig. 1, Figure 1 shows that the diffuser plate that on exiting surface, has pattern.This diffuser plate 100 has a plurality of patterns 120 on exiting surface 110, after light 10 passed this pattern 120, its direct of travel can change, so the bright shadow that can further reduce cathode fluorescent tube and produced is to the influence of display quality.Yet, it should be noted that because this pattern 120 for the structure that outwards protrudes and profile are one circular-arc, spreads after the light of this pattern 120 can accumulate in 1 120P earlier so pass again.Also therefore, still have the not enough problem of diffusion.
So, how to make diffuser plate reach also good diffusion effect, be to be worth this area to have to know that usually the knowledgeable goes to consider ground.
Summary of the invention
The purpose of this invention is to provide a kind of diffuser plate and diffuser plate group, described diffuser plate and diffuser plate group can effectively improve the homogeneity of Luminance Distribution, thereby increase display quality.
According to above-mentioned purpose and other purpose, the invention provides a kind of diffuser plate, this diffuser plate mainly is made of a light-transmitting materials, the pattern that has a plurality of strips on the exiting surface of this diffuser plate, the profile of these patterns has one first arc and one second arc, and the protrusion direction of first arc and second arc is opposite each other, and described second arc is that a circular arc and its radius-of-curvature are between between the 0.05mm to 0.3mm.
In above-mentioned diffuser plate, the longitudinal length of pattern less than horizontal stroke wide 1/2nd.In preferred embodiment, the longitudinal length of pattern and horizontal wide ratio thereof are 1: 2.4.
In above-mentioned diffuser plate, pattern is the structure that protrudes to the outside.Perhaps, pattern also can be the groove to inner recess.
In above-mentioned diffuser plate, the material of diffuser plate is the group that multipolymer, polypropylene, tygon and polyethylene terephthalate constituted that is selected from polymethylmethacrylate, polycarbonate, polystyrene, methyl methacrylate and styrene monomer.
In above-mentioned diffuser plate, the radius-of-curvature of second arc is 0.1mm.
According to above-mentioned purpose and other purpose, the present invention provides a kind of diffuser plate again.This diffuser plate mainly is made of a macromolecule light-transmitting materials, the pattern that has a plurality of strips on the exiting surface of diffuser plate, the profile of these patterns has one first arc and a triangle, and first arc and leg-of-mutton protrusion direction are opposite each other, and leg-of-mutton drift angle is between 90 degree are spent to 120.
According to above-mentioned purpose and other purpose, the invention provides a kind of diffuser plate group.This diffuser plate group comprises one first diffuser plate and one second diffuser plate, and described first diffuser plate is configured in the top of second diffuser plate, and has first pattern of a plurality of strips on the exiting surface of first diffuser plate.The profile of first pattern has one first arc and one second arc, and the protrusion direction of first arc and second arc is opposite each other, and second arc is that a circular arc and its radius-of-curvature are between between the 0.05mm to 0.3mm.And, have a plurality of second patterns on the incidence surface of second diffuser plate.
In above-mentioned diffuser plate group, the longitudinal length of first pattern less than horizontal stroke wide 1/2nd.
In above-mentioned diffuser plate group, second pattern is a water chestnut mirror structure.And the drift angle of this water chestnut mirror structure is between 60 degree are spent to 90.
Because in diffuser plate of the present invention, the profile of its pattern has one first arc and one second arc, and the protrusion direction of first arc and second arc is opposite each other, therefore can present different diffusion ways by the light of first arc with light, so can on display surface, form preferable Luminance Distribution by second arc.Therefore, if a LCD is used diffuser plate of the present invention, then this LCD just can have good display quality.
Description of drawings
Fig. 1 is for having the diffuser plate of pattern on exiting surface;
Fig. 2 A is the stereographic map of the diffuser plate of the first embodiment of the present invention;
Fig. 2 B is depicted as the side view of the diffuser plate of first embodiment;
Fig. 3 is the comparative example of first embodiment;
Fig. 4 A is the stereographic map of the diffuser plate of the second embodiment of the present invention;
Fig. 4 B is depicted as the side view of the diffuser plate of second embodiment;
Fig. 5 is the comparative example of second embodiment;
Fig. 6 is a diffuser plate group;
Fig. 7 A is the stereographic map of the diffuser plate of the third embodiment of the present invention;
Fig. 7 B is depicted as the side view of the diffuser plate of the 3rd embodiment.
Description of reference numerals: 10-light; 20-diffuser plate group; The 100-diffuser plate; The 110-exiting surface; The 120-pattern; The 120P-point; 200,200 ', 300,300 ', 400,500-diffuser plate; 202,302,502-exiting surface; The 402-incidence surface; 210,210 ', 310,310 ', 510-pattern; 410-second pattern; 212,212 ', 312,312 ', 512-first arc; 212P, 212P ', 314P, 314P '-point; 214,314-second arc; The 514-triangle; H, H ', H "-longitudinal length; L, L ', L "-horizontal wide; θ-angle.
Embodiment
Below in conjunction with accompanying drawing, be described in more detail with other technical characterictic and advantage the present invention is above-mentioned.
See also Fig. 2 A and Fig. 2 B, Fig. 2 A is depicted as the stereographic map of the diffuser plate of the first embodiment of the present invention, and Fig. 2 B is depicted as the side view of the diffuser plate of first embodiment.The pattern 210 that has a plurality of strips on the exiting surface 202 of this diffuser plate 200, this pattern 210 are a structure (structure) that outwards protrudes, and the longitudinal length H of pattern 210 is less than 1/2nd of the wide L of horizontal stroke.Please refer to Fig. 2 B, by Fig. 2 B as can be known the profile of pattern 210 have one first arc 212 and one second arc 214, and the protrusion direction of first arc 212 and second arc 214 is opposite each other, that is: first arc 212 is the shape of protruding to the outside of diffuser plate 200, and second arc 214 is the shape to the inner recess of diffuser plate 200.In the present embodiment, second arc 214 is that a circular arc and its radius-of-curvature are between between the 0.05mm to 0.3mm.
Please continue the B with reference to Fig. 2, by Fig. 2 B as can be known, spread can inwardly accumulate in a 212P after light 10 passes first arc 212 after again, 10 of light that so pass second arc 214 can be directly to external diffusion.Therefore, after light 10 passes pattern 210, can present two kinds of different diffusion ways.Then, please refer to Fig. 3, Figure 3 shows that the comparative example of first embodiment, the pattern 210 ' on the diffuser plate 200 ' of this comparative example is with the difference of pattern 210: pattern 210 ' does not have second arc 214 that caves inward, and only has first arc 212 ' of outside protrusion.Therefore, spread again after after light 10 passes pattern 210 ', all can inwardly accumulating in a 212P '.
Behind comparison diagram 2B and Fig. 3 as can be known, when light 10 passes pattern 210, owing to can present two kinds of different diffusion ways, so can make integral body reach preferable diffusion effect.Therefore, on display surface, just be not easy to produce the light and shade band.Therefore, the LCD with diffuser plate 200 just has higher display quality.
Then, please refer to Fig. 4 A and Fig. 4 B, Fig. 4 A is depicted as the stereographic map of the diffuser plate of the second embodiment of the present invention, and Fig. 4 B is depicted as the side view of the diffuser plate of second embodiment.The pattern 310 that has a plurality of strips on the exiting surface 302 of this diffuser plate 300, this pattern 310 is a groove that caves inward (concave), and the longitudinal length H ' of pattern 310 is less than 1/2nd of the wide L ' of horizontal stroke.In preferred embodiment, the longitudinal length of pattern and horizontal wide ratio thereof are 1: 2.4.Please refer to Fig. 4 B, by Fig. 4 B as can be known the profile of pattern 310 have one first arc 312 and one second arc 314, and the protrusion direction of first arc 312 and second arc 314 is opposite each other, also promptly: first arc 312 is the shape to the inner recess of diffuser plate 300, and second arc 314 is the shape of protruding to the outside of diffuser plate 300.In the present embodiment, second arc is that a circular arc and its radius-of-curvature are between between the 0.05mm to 0.3mm.
Please continue the B with reference to Fig. 4, Fig. 4 B is depicted as the direct of travel figure behind the pattern that light passes second embodiment.By Fig. 4 B as can be known, can be after light 10 passes first arc 312 to external diffusion, after can inwardly accumulating in a 314P, 10 of light that so pass second arc 314 spread again.Therefore, after light 10 passes pattern 310, can present two kinds of different diffusion ways.Then, please refer to Fig. 5, Figure 5 shows that the comparative example of second embodiment, the pattern 310 ' on the diffuser plate 300 ' of this comparative example is with the difference of pattern 310: pattern 310 ' does not have second arc 314 of outside protrusion, and only has first arc 312 ' that caves inward.Therefore, all can be after light 10 passes pattern 310 ' to external diffusion.
As can be known, after light 10 passes pattern 310, can present two kinds of different diffusion ways behind comparison diagram 4B and Fig. 5, so can make integral body reach preferable diffusion effect.Therefore, the LCD with diffuser plate 300 just has higher display quality.
Certainly, in the use, first above-mentioned embodiment and the diffuser plate of second embodiment other diffuser plate of all can arranging in pairs or groups.For example, diffuser plate 200 also can be combined and become a diffuser plate group 20 (as shown in Figure 6) with second diffuser plate 400, and second diffuser plate 400 is positioned at the below of diffuser plate 200.Because diffuser plate 200 is described in first embodiment, just repeats no more at this.Have a plurality of second patterns 410 on the incidence surface 402 of second diffuser plate 400, these second patterns 410 are water chestnut mirror structure (prism structure), and the drift angle of this water chestnut mirror structure is between 60 degree are spent to 90.In the present embodiment, second pattern 410 is orthogonal with the orientation of pattern 210, and also promptly the orientation of second pattern 410 and pattern 210 differs 90 degree.Second pattern 410 is owing to having the effect that changes opticpath, so can make diffuser plate group 20 reach also good diffusion effect on the whole.Certainly, this area has knows that usually the knowledgeable also can make second pattern 410 into other shape, as: semicircle is spherical etc.In addition, this area has and knows that usually the knowledgeable also can be designed to the orientation of second pattern 410 and pattern 210 to be parallel to each other or differs other angle.
Come again, above-mentioned diffuser plate group 20 is carried out optics emulation.In this optics emulation, shine with 10 pairs of diffuser plate groups 20 of one group of light, and the radius-of-curvature of second arc 214 of diffuser plate 200 is made as 0.1mm, then resulting all together degree (uniformity) be 1.03, so-called all neat degree is meant in the exiting surface 202 in the high light and exiting surface 202 ratio of dark place.
Afterwards, the diffuser plate in the diffuser plate group 20 200 is replaced as the diffuser plate 300 shown in Fig. 4 B, and the radius-of-curvature of second arc 314 of diffuser plate 300 is made as 0.1mm, and carries out optics emulation again, resulting all together degree (uniformity) be 1.01.
Then, the diffuser plate in the diffuser plate group 20 200 is replaced as diffuser plate 200 ' shown in Figure 3 after, carry out optics emulation again, resulting all together degree (uniformity) be 1.1.
By the optics simulation result as can be known, diffuser plate of the present invention has preferable all spending together, and therefore if a LCD is used diffuser plate of the present invention, then this LCD just can have good display quality.
Certainly, this area has knows that usually the knowledgeable also can make second arc 314 into the shape of other non-arc, below will be for the embodiment explanation.Please refer to Fig. 7 A and Fig. 7 B, Fig. 7 A is depicted as the stereographic map of the diffuser plate of the third embodiment of the present invention, and Fig. 7 B is depicted as the side view of the diffuser plate of the 3rd embodiment.Diffuser plate 500 mainly is made of a macromolecule light-transmitting materials, the pattern 510 that has a plurality of strips on the exiting surface 502 of described diffuser plate 500, the profile of these patterns 510 has one first arc 512 and a triangle 514, and first arc 512 is opposite each other with the protrusion direction of triangle 514.That is the vertex angle theta of triangle 514 is between 90 degree are spent to 120, and the longitudinal length H of pattern 510 " less than the wide L of horizontal stroke " 1/2nd.Though in the 3rd embodiment, pattern 510 is the structure that protrudes to the outside, this area has knows that usually the knowledgeable also can be designed to pattern 510 groove to inner recess.
In the above embodiments, pattern size each other all is in the same manner, but this area has and know that usually the knowledgeable also can be designed to size difference to some extent with pattern according to situation, for example with the two kinds of pattern that varies in size non-row interlaced with each other.
In addition, in the above-described embodiment, though the pattern on the diffuser plate is tightly to join mutually each other, this area has knows that usually the knowledgeable also can make pattern each other at intervals.And in the above-described embodiment, longitudinal length H is less than 1/2nd of the wide L of horizontal stroke, but this area has and knows that usually the knowledgeable also can be designed to longitudinal length H more than or equal to 1/2nd of the wide L of horizontal stroke.
The above only is preferred embodiment of the present invention, only is illustrative for the purpose of the present invention, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes to it in the spirit and scope that claim of the present invention limited, revise, even equivalence, but all will fall within the scope of protection of the present invention.
Claims (11)
1. diffuser plate, it comprises a light-transmitting materials, it is characterized in that: described diffuser plate comprises exiting surface, the pattern that has a plurality of strips on the described exiting surface, the profile of described these patterns has one first arc and one second arc, and the protrusion direction of described first arc and described second arc is opposite each other, and described second arc is that a circular arc and its radius-of-curvature are between between the 0.05mm to 0.3mm.
2. diffuser plate according to claim 1 is characterized in that: the longitudinal length of described pattern less than horizontal stroke wide 1/2nd.
3. diffuser plate according to claim 2 is characterized in that: the longitudinal length of described pattern and horizontal wide ratio thereof are 1: 2.4.
4. diffuser plate according to claim 1 and 2 is characterized in that: the structure of described these patterns for protruding to the outside.
5. diffuser plate according to claim 1 and 2 is characterized in that: described these patterns are the groove to inner recess.
6. diffuser plate according to claim 1 and 2 is characterized in that: the material of described diffuser plate is the group that multipolymer, polypropylene, tygon and polyethylene terephthalate constituted of polymethylmethacrylate, polycarbonate, polystyrene, methyl methacrylate and styrene monomer.
7. diffuser plate according to claim 1 and 2 is characterized in that: the radius-of-curvature of described second arc is 0.1mm.
8. diffuser plate group, it is characterized in that: it comprises one first diffuser plate and one second diffuser plate, described first diffuser plate is configured in the top of described second diffuser plate, first pattern that has a plurality of strips on the exiting surface of described first diffuser plate, the profile of described these first patterns has one first arc and one second arc, and the protrusion direction of described first arc and described second arc is opposite each other, and described second arc is that a circular arc and its radius-of-curvature are between between the 0.05mm to 0.3mm; And, have a plurality of second patterns on the incidence surface of described second diffuser plate.
9. diffuser plate group according to claim 8 is characterized in that: the radius-of-curvature of described second arc is 0.1mm.
10. diffuser plate group according to claim 8 is characterized in that: described these second patterns are water chestnut mirror structure.
11. diffuser plate group according to claim 10 is characterized in that: the drift angle of described water chestnut mirror structure is between 60 degree are spent to 90.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101820934A CN101424754B (en) | 2007-10-31 | 2007-10-31 | Diffusion plate and diffuser plate set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101820934A CN101424754B (en) | 2007-10-31 | 2007-10-31 | Diffusion plate and diffuser plate set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101424754A CN101424754A (en) | 2009-05-06 |
| CN101424754B true CN101424754B (en) | 2011-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101820934A Active CN101424754B (en) | 2007-10-31 | 2007-10-31 | Diffusion plate and diffuser plate set |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011062024A1 (en) * | 2009-11-20 | 2011-05-26 | シャープ株式会社 | Optical member, lighting device, display apparatus, television receiver, and manufacturing method of optical member |
| TWI476460B (en) | 2012-12-28 | 2015-03-11 | Chi Mei Corp | Optical plate with micro-structure |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6322872B1 (en) * | 1997-07-17 | 2001-11-27 | Alusuisse Technology & Management Ltd. | Rolled product of metal exhibiting a light-spreading surface structure |
| CN1900793A (en) * | 2005-07-21 | 2007-01-24 | 欧姆龙株式会社 | Surface light source device |
| CN1942788A (en) * | 2004-02-26 | 2007-04-04 | 他喜龙株式会社 | Light diffusing sheet, and backlight unit using this light diffusing sheet |
| CN2921887Y (en) * | 2006-04-03 | 2007-07-11 | 中强光电股份有限公司 | Backlight module |
-
2007
- 2007-10-31 CN CN2007101820934A patent/CN101424754B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6322872B1 (en) * | 1997-07-17 | 2001-11-27 | Alusuisse Technology & Management Ltd. | Rolled product of metal exhibiting a light-spreading surface structure |
| CN1942788A (en) * | 2004-02-26 | 2007-04-04 | 他喜龙株式会社 | Light diffusing sheet, and backlight unit using this light diffusing sheet |
| CN1900793A (en) * | 2005-07-21 | 2007-01-24 | 欧姆龙株式会社 | Surface light source device |
| CN2921887Y (en) * | 2006-04-03 | 2007-07-11 | 中强光电股份有限公司 | Backlight module |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2003-14913A 2003.01.15 |
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| CN101424754A (en) | 2009-05-06 |
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