CN105353454A - PMMA light guide plate with light emergent micro-prism structure - Google Patents
PMMA light guide plate with light emergent micro-prism structure Download PDFInfo
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- CN105353454A CN105353454A CN201510781490.8A CN201510781490A CN105353454A CN 105353454 A CN105353454 A CN 105353454A CN 201510781490 A CN201510781490 A CN 201510781490A CN 105353454 A CN105353454 A CN 105353454A
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- light
- guide plate
- light guide
- prism structure
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- 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
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a PMMA light guide plate with a light emergent micro-prism structure. The PMMA light guide plate comprises a light transmitting plate which comprises a light emergent surface and a bottom surface. The light transmitting plate is made of PMMA material. A prism structure is arranged on the light emergent surface. The prism structure is provided with multiple bulges which are arranged in parallel with arc-shaped cross sections. A U-shaped groove is formed between the two adjacent bulges. Spherical bulge arrays are arranged on the bottom surface. The spherical bulge arrays comprise M rows and N columns. Spherical bulges are identical in size and uniformly distributed on the bottom surface. The spherical bulges of the two adjacent rows are arranged in a staggered way in a row direction. According to the light guide plate, the unique U-shaped grooves are arranged on the light emergent surface of the light transmitting plate, the spherical bulge arrays with unique layout arrangement are arranged on the bottom surface of the light transmitting plate, and the parameters values of the U-shaped grooves and the spherical bulge arrays are strictly controlled so that the light guide plate is uniform in luminance without chromatic aberration and excellent in optical performance.
Description
Technical field
The present invention relates to a kind of light guide plate, especially relate to a kind of PMMA light guide plate with bright dipping micro-prism structure.
Background technology
Light guide plate, for guiding light transmission direction, the pointolite that the incident side by light guide plate enters or line source are penetrated by the exiting surface of light guide plate and then are become area source after the scattering and reflection of light guide plate.Furthermore, whether this area source has enough brightness and the whether luminous structural design evenly then depending on light guide plate completely.
In traditional light guide plate design, especially in plate shaped light guide plate: (1) has one side to arrange the design of U-shaped groove one side printing light guide ink site, the face at U-lag place is allowed to be exiting surface, allow the face at place, light guide ink site be bottom surface, make it to destroy the total reflection of light thus light can be penetrated from exiting surface in a large number; (2) there is one side that the design of vee-cut one side printing light guide ink site is set, allow the face at V-shaped groove place be exiting surface, allow the face at place, light guide ink site be bottom surface, make it to destroy the total reflection of light thus light can be penetrated from exiting surface in a large number.By the cooperation of U-lag and ink site, or the transmission direction of the cooperation of V-shaped groove and ink site to light guides, and then sends the enough and light be evenly distributed of brightness at the exiting surface of light guide plate.
In above-mentioned design, because V-shaped groove itself has a tip, so more easily guide the transmission of light compared to U-lag V-shaped groove, so add a small amount of guide-lighting particle can meet certain standard.But be no matter U-lag design or V-shaped groove design: first, they all to need in printing light guide ink site, bottom surface the enough and uniform feature of luminescence to the brightness meeting light guide plate.And the ink printing of light guide plate itself is not easily management and control in process of production, add and also will to match the incompatible guiding completed light with the U-lag of design or V-shaped groove, therefore its production process requires harsh, and complicated.Simultaneously from another aspect, due to the more complicated of typography own, so need the equipment a lot (such as printing press, infrared drying stove etc.) dropped into, input cost is higher, and a large amount of ink material that uses also easily produces waste gas in printing process, pollute.
Meanwhile, tradition also has a kind of light guide plate to be design like this: (1) one side arranges U-lag and has smoothness on one surface, and is added with a large amount of guide-lighting particle, allows the face at U-lag place be exiting surface; (2) simultaneously arrange V-shaped groove to have smoothness on one surface, and be added with a small amount of guide-lighting particle, allow the face at V-shaped groove place be exiting surface.Guided by U-lag and the cooperation of guide-lighting particle or the transmission direction of cooperation to light of V-shaped groove and guide-lighting particle, and then make light extraction efficiency and the homogeneity of guarantee light guide plate.This two kinds of light guide plate design above-mentioned does not just need printing-ink site, solves the problem that typography not easily management and control, equipment investment are too high, easily pollute.But the guide-lighting particle components preparation process complicated difficult control added in these two kinds of light guide plate designs, R&D costs are high, and use cost is also high.Although market there is the guide-lighting particle that some compositions are simply common, its effect that light guide plate can be reached is unsatisfactory.
Summary of the invention
Object of the present invention is exactly to solve the problem, a kind of PMMA light guide plate with bright dipping micro-prism structure is provided, be intended to both to adopt typography to carry out the printing of light guide ink site, also extra guide-lighting particle need not be added, just be provided with the light guide effect also more excellent than the above two, brightness is high, luminescence is more even.
To achieve these goals, the present invention adopts following technical scheme: a kind of PMMA light guide plate with bright dipping micro-prism structure, and comprise light-passing board, described light-passing board comprises exiting surface and bottom surface, and described light-passing board is made up of PMMA material;
Described exiting surface arranges prism structure, and described prism structure has some that be arranged in parallel, that cross section is curved projections, and form U-shaped groove between two adjacent projections, the degree of depth of described U-shaped groove and span are respectively 4.5 ~ 86.25 μm and 57.5 ~ 425.5 μm;
Described bottom surface arranges hemisphere jut array, described hemisphere jut array comprises the capable N row of M, hemisphere jut is in the same size and be uniformly distributed on bottom surface, the hemisphere jut of adjacent rows is crisscross arranged in the row direction, Distances Between Neighboring Edge Points between two adjacent hemisphere juts is at 0.285 ~ 0.3mm, the diameter of hemisphere jut is 0.675 ~ 0.7mm, and hemisphere jut height is 0.315 ~ 0.35mm.
Preferably, the angle value R of described projection is 203 ~ 227 degree.
Preferably, described projection cross section semicircular in shape.
Preferably, the shape of described hemisphere jut is semisphere or Part-spherical.
Preferably, the material of described hemisphere jut is PMMA, and one-body molded with light-passing board.
Preferably, the thickness of described light-passing board is 0.5 ~ 3.0mm.
Preferably, described light-passing board thickness is 0.5mm, and the degree of depth of described U-shaped groove is 4.5 ~ 6.5 μm, and span is 57.5 ~ 72.5 μm.
Preferably, described light-passing board thickness is 1.0mm, and the degree of depth of described U-shaped groove is 8.05 ~ 9.2 μm, and span is 57.5 ~ 72.5 μm.
Preferably, described light-passing board thickness is 2.0mm, and the degree of depth of described U-shaped groove is 40.25 ~ 46 μm, and span is 172.5 ~ 189.75 μm.
Preferably, when described light-passing board thickness is 3.0mm, the degree of depth of described U-shaped groove is 80.5 ~ 86.25 μm, and span is 345 ~ 425.5 μm.
Compared with prior art, the present invention has following beneficial effect: light guide plate of the present invention is by arranging unique U-shaped groove at the exiting surface of light-passing board, the hemisphere jut array of layout arrangement uniqueness is set in the bottom surface of light-passing board, and pass through the parameter value of both strict controls, light guide plate is made not need to republish, do not need to add guide-lighting particle, just reach more excellent technique effect yet, this technique effect be embodied in light guide plate higher light extraction efficiency and luminous evenly characteristic.Meanwhile, adopt the PMMA material with high transparent to make light guide plate, make the light colourity impact of light guide plate on light source little, the bright dipping in whole plate face there will not be color distortion.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that in embodiment, a kind of PMMA light guide plate with bright dipping micro-prism structure coordinates with light source, eliminates part-structure in figure.
Fig. 2 is a kind of PMMA light conducting plate structure schematic diagram with bright dipping micro-prism structure in embodiment.
Fig. 3 is enlarged icon intention in K place in Fig. 2.
Fig. 4 a kind ofly in embodiment has hemisphere jut array structure schematic diagram in the PMMA light guide plate of bright dipping micro-prism structure.
Fig. 5 is V place enlarged diagram in Fig. 4.
Fig. 6 is hemisphere jut array upper right corner partial structurtes schematic diagram in Fig. 4.
Fig. 7 is hemisphere jut close-up schematic view in Fig. 2.
Description of reference numerals: 1-light source, 2-light-passing board, 21a-first incidence surface, 21b-second incidence surface, 22a-first side, 22b-second side, 23-exiting surface, 23a-projection, 23b-U type groove, 24-bottom surface, 24a-hemisphere jut.
Embodiment
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
See Fig. 1 to Fig. 7, a kind of PMMA light guide plate with bright dipping micro-prism structure comprises light-passing board 2, and described light-passing board 2 comprises exiting surface 23 and bottom surface 24, and described light-passing board 2 is made up of PMMA material; Described exiting surface 23 arranges prism structure, described prism structure has some that be arranged in parallel, that cross section is curved projection 23a, form U-shaped groove 23b between two adjacent projection 23a, the degree of depth of described U-shaped groove 23b and span (the peak-to-peak distance of two adjacent protrusions ripples) are respectively 4.5 ~ 86.25 μm and 57.5 ~ 425.5 μm; Described bottom surface 24 arranges hemisphere jut array, described hemisphere jut array comprises the capable N row of M, hemisphere jut 24a is in the same size and be uniformly distributed on bottom surface 24, the hemisphere jut 24a of adjacent rows is crisscross arranged in the row direction, Distances Between Neighboring Edge Points L between two adjacent hemisphere jut 24a is at 0.285 ~ 0.3mm, the diameter R of hemisphere jut 24a is 0.675 ~ 0.7mm, and hemisphere jut 24a height H is 0.315 ~ 0.35mm.
Described light-passing board 2 also comprises at least one incidence surface (be two incidence surfaces in accompanying drawing, be respectively first, second incidence surface 21a, 21b), in order to receive the light that light source 1 sends.Light source 1 can be LED lamp bar, or other fluorescent tubes.Light source 1 is disposed adjacent with two incidence surfaces of light guide plate respectively.After the light sent when light source 1 enters light guide plate from incidence surface, when running into U-shaped groove 23b in light guide plate, just can there is reflection and scattering in light, and transmit to each different directions, finally penetrated by the exiting surface 23 of light guide plate.And in order to make light evenly penetrate from exiting surface 23 as far as possible, thus improve the light extraction efficiency (i.e. brightness) of light guide plate, the present invention arranges hemisphere jut array in the bottom surface 24 of light guide plate, hemisphere jut has arc-shaped curved surface, so can be undertaken reflecting or reflection blocking by these hemisphere juts when light is for penetrating from the bottom surface of light guide plate, make it to penetrate from the exiting surface 23 relative with bottom surface 24.
Because light guide plate is not only to ensure enough brightness (i.e. light extraction efficiency), the light sent also will be made to want evenly, there will not be the situation that local is bright, local is dark, thus affect Consumer's Experience, the present invention is also to degree of depth a and the span b of U-shaped groove 23b and conduct in-depth research the arrangement (comprising Distances Between Neighboring Edge Points, height of projection and projection diameter three key factors) of hemisphere jut array, the light guide plate of producing is made not only to have enough brightness, reach several grades of more than required standard, but also make luminescence more even.These factors decide light extraction efficiency height and the uniformity of luminance of whole light guide plate.
Meanwhile, a good and bad key factor in addition of described light guide plate light guide effect is then material.Present invention employs and preferentially have employed PMMA (methyl methacrylate) material, PMMA is macromolecule transparent material the most excellent at present, and visible light transmissivity reaches 92%, higher than the penetrability of glass.Therefore the high light transmittance of PAAM then becomes the prioritizing selection of light guide plate to material.Furthermore, because PMMA light transmission is high, then colourity is low, and make the light colourity impact of light guide plate on light source little, the bright dipping in whole plate face there will not be color distortion.That is: user can not see the phenomenon that display device has local partially yellow.In order to further illustrate some characteristics that light guide plate of the present invention adopts PMMA material to have, in table 1, list a PMMA property list:
Table 1
Can obviously be seen by upper table 1, PMMA material has the characteristic of high light transmittance, low water absorption, so be fit closely compared to PS plastic material for light guide plate.
As preferably, the angle value R of described projection 23a is 203 ~ 227 degree, described projection 23a cross section semicircular in shape, and the shape of described hemisphere jut 24a is semisphere or Part-spherical (namely cross section radian is equal to or less than 180 °).The material of described hemisphere jut 24a is PMMA, and one-body molded with light-passing board 2.
According to the thickness difference (thickness of such as light-passing board 2 is 0.5 ~ 3.0mm) of light-passing board 2, the degree of depth of U-shaped groove 23b and the corresponding value of span are below preferred exemplary:
The first scheme: described light-passing board 2 thickness is 0.5mm, the degree of depth of described U-shaped groove 23b is 4.5 ~ 6.5 μm, and span is 57.5 ~ 72.5 μm.
First scheme: described light-passing board 2 thickness is 1.0mm, the degree of depth of described U-shaped groove 23b is 8.05 ~ 9.2 μm, and span is 57.5 ~ 72.5 μm.
The third scheme: described light-passing board 2 thickness is 2.0mm, the degree of depth of described U-shaped groove 23b is 40.25 ~ 46 μm, and span is 172.5 ~ 189.75 μm.
4th kind of scheme: when described light-passing board 2 thickness is 3.0mm, the degree of depth of described U-shaped groove 23b is 80.5 ~ 86.25 μm, and span is 345 ~ 425.5 μm.
Embodiment one: this embodiment provide a kind of thickness be 0.5mm, material is the light guide plate (a kind of PMMA light guide plate with bright dipping micro-prism structure) of PMMA material, it comprises light-passing board 2, the exiting surface 23 of light-passing board 2 is provided with prism structure, prism structure has some that be arranged in parallel, that cross section is curved R angle value at the projection 23a of 205 degree, being formed with degree of depth a between two adjacent protrusions 23a is 5 μm, and span b is the U-shaped groove 23b of 60 μm; The bottom surface 24 of light-passing board 2 is provided with hemisphere jut array, hemisphere jut array includes the hemisphere jut of the some row of several rows, hemisphere jut 24a is in the same size and be uniformly distributed on bottom surface, each hemisphere jut of adjacent rows is crisscross arranged in the row direction, Distances Between Neighboring Edge Points between two adjacent hemisphere juts is at 0.287mm, the diameter of each hemisphere jut 24a is at 0.68mm, and hemisphere jut 24a height is at 0.32mm.
Light guide plate luminescence very evenly, without color distortion, light extraction efficiency and brightness can reach 5Kcd/m
2, far beyond the industry standard of light guide plate.And do not need printing conductive inks site, do not need to add guide-lighting particle yet, just achieve even more excellent effect identical with the two, also greatly saved production cost simultaneously.
Embodiment two: this embodiment provide a kind of thickness be 1.0mm, material is the light guide plate (a kind of PMMA light guide plate with bright dipping micro-prism structure) of PMMA material, it comprises light-passing board 2, the exiting surface of light-passing board 2 arranges prism structure, prism structure has some that be arranged in parallel, that cross section is curved R angle value at the projection 23a of 213 degree, being formed with degree of depth a between two adjacent protrusions 23a is 8.5 μm, and span b is the U-shaped groove 23b of 60 μm; The bottom surface of light-passing board 2 arranges hemisphere jut array, hemisphere jut array includes the hemisphere jut 24a of the some row of several rows, hemisphere jut 24a is in the same size and be uniformly distributed on bottom surface, each hemisphere jut of adjacent rows is crisscross arranged in the row direction, Distances Between Neighboring Edge Points between two adjacent hemisphere juts is at 0.290mm, the diameter of each hemisphere jut 24a is at 0.682mm, and hemisphere jut 24a height is at 0.33mm.
Light guide plate luminescence very evenly, without color distortion, light extraction efficiency and brightness can reach 5.3Kcd/m
2, far beyond the industry standard of light guide plate.And do not need printing conductive inks site, do not need to add guide-lighting particle yet, just achieve even more excellent effect identical with the two, also greatly saved production cost simultaneously.
Embodiment three: this embodiment provide a kind of thickness be 2.0mm, material is the light guide plate (a kind of PMMA light guide plate with bright dipping micro-prism structure) of PMMA material, it comprises light-passing board 2, the exiting surface of this light-passing board 2 is provided with prism structure, prism structure has some that be arranged in parallel, that cross section is curved R angle value at the projection 23a of 220 degree, being formed with degree of depth a between two adjacent protrusions 23a is 43 μm, and span b is the U-shaped groove 23b of 180 μm; The bottom surface of this light-passing board 2 is provided with hemisphere jut array, described hemisphere jut array includes the hemisphere jut 24a of the some row of several rows, hemisphere jut 24a is in the same size and be uniformly distributed on bottom surface, each hemisphere jut of adjacent rows is crisscross arranged in the row direction, Distances Between Neighboring Edge Points between two adjacent hemisphere juts is at 0.293mm, the diameter of each hemisphere jut 24a is at 0.69mm, and hemisphere jut 24a height is at 0.34mm.
Light guide plate luminescence very evenly, without color distortion, light extraction efficiency and brightness can reach 5.8Kcd/m
2, far beyond the industry standard of light guide plate.And do not need printing conductive inks site, do not need to add guide-lighting particle yet, just achieve even more excellent effect identical with the two, also greatly saved production cost simultaneously.
Embodiment four: this embodiment provide a kind of thickness be 3.0mm, material is the light guide plate (a kind of PMMA light guide plate with bright dipping micro-prism structure) of PMMA material, it comprises light-passing board 2, the exiting surface of this light-passing board 2 is provided with prism structure, prism structure has some that be arranged in parallel, that cross section is curved R angle value at the projection 23a of 223 degree, being formed with degree of depth a between two adjacent protrusions 23a is 83 μm, and span b is the U-shaped groove 23b of 400 μm; The bottom surface of this light-passing board 2 is provided with hemisphere jut array, hemisphere jut array includes the hemisphere jut 24a of the some row of several rows, hemisphere jut 24a is in the same size and be uniformly distributed on bottom surface, each hemisphere jut of adjacent rows is crisscross arranged in the row direction, Distances Between Neighboring Edge Points between two adjacent hemisphere juts is at 0.3mm, the diameter of each hemisphere jut 24a is at 0.7mm, and hemisphere jut 24a height is at 0.35mm.
Light guide plate luminescence very evenly, without color distortion, light extraction efficiency and brightness can reach 5.5Kcd/m
2, far beyond the industry standard of light guide plate.And do not need printing conductive inks site, do not need to add guide-lighting particle yet, just achieve even more excellent effect identical with the two, also greatly saved production cost simultaneously.
In general, light guide plate of the present invention is by arranging unique U-shaped groove at the exiting surface of light-passing board 2, the hemisphere jut array of layout arrangement uniqueness is set in the bottom surface of light-passing board 2, and pass through the parameter value of both strict controls, light guide plate is made not need to republish, do not need to add guide-lighting particle, just can reach more excellent technique effect, show uniformity of luminance and luminosity yet.The mode of printing of conventional light guiding plate and the addition manner of guide-lighting particle, the luminosity that can reach is generally at 4.3 ~ 4.7Kcd/m
2, and inventor is by arduous innovation and strict test, having made luminosity can reach 5Kcd/m
2light guide plate, make the development of light guide plate step forward a step again.
The foregoing is only the preferred embodiment of the present invention, protection scope of the present invention is not limited in above-mentioned embodiment, and every technical scheme belonging to the principle of the invention all belongs to protection scope of the present invention.For a person skilled in the art, the some improvement carried out under the prerequisite not departing from principle of the present invention, these improvement also should be considered as protection scope of the present invention.
Claims (10)
1. have a PMMA light guide plate for bright dipping micro-prism structure, comprise light-passing board, described light-passing board comprises exiting surface and bottom surface, it is characterized in that, described light-passing board is made up of PMMA material;
Described exiting surface arranges prism structure, and described prism structure has some that be arranged in parallel, that cross section is curved projections, and form U-shaped groove between two adjacent projections, the degree of depth of described U-shaped groove and span are respectively 4.5 ~ 86.25 μm and 57.5 ~ 425.5 μm;
Described bottom surface arranges hemisphere jut array, described hemisphere jut array comprises the capable N row of M, hemisphere jut is in the same size and be uniformly distributed on bottom surface, the hemisphere jut of adjacent rows is crisscross arranged in the row direction, Distances Between Neighboring Edge Points between two adjacent hemisphere juts is at 0.285 ~ 0.3mm, the diameter of hemisphere jut is 0.675 ~ 0.7mm, and hemisphere jut height is 0.315 ~ 0.35mm.
2. a kind of PMMA light guide plate with bright dipping micro-prism structure according to claim 1, is characterized in that, the angle value R of described projection is 203 ~ 227 degree.
3. a kind of PMMA light guide plate with bright dipping micro-prism structure according to claim 2, is characterized in that, described projection cross section semicircular in shape.
4. a kind of PMMA light guide plate with bright dipping micro-prism structure according to claim 3, is characterized in that, the shape of described hemisphere jut is semisphere or Part-spherical.
5. a kind of PMMA light guide plate with bright dipping micro-prism structure according to claim 4, is characterized in that, the material of described hemisphere jut is PMMA, and one-body molded with light-passing board.
6. a kind of PMMA light guide plate with bright dipping micro-prism structure according to any one of claim 1-5, is characterized in that, the thickness of described light-passing board is 0.5 ~ 3.0mm.
7. a kind of PMMA light guide plate with bright dipping micro-prism structure according to claim 6, it is characterized in that, described light-passing board thickness is 0.5mm, and the degree of depth of described U-shaped groove is 4.5 ~ 6.5 μm, and span is 57.5 ~ 72.5 μm.
8. a kind of PMMA light guide plate with bright dipping micro-prism structure according to claim 6, it is characterized in that, described light-passing board thickness is 1.0mm, and the degree of depth of described U-shaped groove is 8.05 ~ 9.2 μm, and span is 57.5 ~ 72.5 μm.
9. a kind of PMMA light guide plate with bright dipping micro-prism structure according to claim 6, it is characterized in that, described light-passing board thickness is 2.0mm, and the degree of depth of described U-shaped groove is 40.25 ~ 46 μm, and span is 172.5 ~ 189.75 μm.
10. a kind of PMMA light guide plate with bright dipping micro-prism structure according to claim 6, is characterized in that, when described light-passing board thickness is 3.0mm, the degree of depth of described U-shaped groove is 80.5 ~ 86.25 μm, and span is 345 ~ 425.5 μm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510781490.8A CN105353454A (en) | 2015-11-13 | 2015-11-13 | PMMA light guide plate with light emergent micro-prism structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510781490.8A CN105353454A (en) | 2015-11-13 | 2015-11-13 | PMMA light guide plate with light emergent micro-prism structure |
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Application publication date: 20160224 |