CN1755450A - Method for making light guide plate and side light type backlight assembly - Google Patents
Method for making light guide plate and side light type backlight assembly Download PDFInfo
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- CN1755450A CN1755450A CN 200410012018 CN200410012018A CN1755450A CN 1755450 A CN1755450 A CN 1755450A CN 200410012018 CN200410012018 CN 200410012018 CN 200410012018 A CN200410012018 A CN 200410012018A CN 1755450 A CN1755450 A CN 1755450A
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- guide plate
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Abstract
The invention relates to a method for making light guiding plate and a side light type negative phototropic component. The method comprises: using the laser to form an uneven surface on a mold and using the mold to make the light guiding plate so as to form the uneven surface which is formed by the micro mirror plate structure on the light guiding plate.
Description
Technical field
The invention provides a kind of method and light guide plate thereof of making light guide plate, refer to that especially a kind of making utilizes the light guide plate method and the light guide plate thereof of Laser Processing.
Background technology
Because liquid crystal itself can't be luminous, therefore backlight assembly is to be LCD (liquidcrystal display, LCD) key components and parts of panel, its major function just fully reach the light source that is evenly distributed in supply brightness, so that the normal show image of LCD panel.And along with the LCD panel has been widely used in the electronic product of numerous tool growth potentiality, as monitor (monitor), notebook computer, digital camera, projector or the like, during the demand of backlight assembly and related components thereof also continues to grow up.
Generally speaking, backlight assembly can be according to the position of light source, is divided into light source and produces from (direct-type) backlight assembly of the straight-down negative under the display panel and light source near two kinds of designs of the side-light type the display panel side (edge-type) backlight assembly.And, therefore can dwindle the volume and the manufacturing cost of LCD wherein because the side-light type backlight assembly is a side of light source generator being located at display panel, and be applied to small-sized electric equipment products.
Consult Fig. 1, Fig. 1 is the synoptic diagram of known side-light type backlight assembly 10.Side-light type backlight assembly 10 mainly comprises: one is located at light guide plate (light guide plate, LGP) 14 of display panel 12 belows; Be located at a plurality of fluorescent tubes 16 of a side of light guide plate 14, described a plurality of fluorescent tubes can be the cold cathode fluorescent lamp pipe (cold cathode fluorescent lamp, CCFL); One is located at the lampshade 18 in the outside of a plurality of fluorescent tubes 16; One reflecting plate (reflecting sheet) 20, this reflecting plate is located at light guide plate 14 belows, is used for passing the light reflected back light guide plate 14 of light guide plate 14 downwards; One is located at the optical material layer 22 between light guide plate 14 and the display panel 12; And two lamp tube fixing piece 24, described two lamp tube fixing piece are installed on the both sides of fluorescent tube 16, are used for fixing fluorescent tube 16.Wherein, fluorescent tube 16 is to be used to provide a light source to display panel 12, and lampshade 18 and reflecting plate 20 are to be used for the light that fluorescent tube 16 is produced is reflexed to light guide plate 14 increasing the utilization rate of light, with so that a preferable brightness output is provided.The miniature scattering point of light guide plate 14 belows can destroy light in the total reflection of light guide plate 14 and light refraction is gone out light guide plate 14 enter optical material layer 22, optical material layer 22 can be with the light that reflected by light guide plate 14 further atomizing and optically focused, to provide display panel 12 required light source.
From the above, light guide plate 14 is one of vital part of side-light type backlight assembly 10, the effect of light guide plate 14 is the scattering direction of direct light, be used for improving the briliancy of display panel 12, and guarantee the homogeneity of display panel 12 brightness, therefore the design of light guide plate 14 and the control of making concern backlight assembly optical design and briliancy, all spending are topmost technology of backlight assembly manufacturer and cost place.Generally speaking, the production method of known light guide plate 14 patterns has two kinds according to processing procedure, first kind of mode is utilization screen painting (screen printing) mode, on the acryl flat board, make the material of apparatus " high reflectance " and " not extinction ", stamp circular or square pattern in light guide plate 14 bottom surfaces; The second way is to utilize mould, and direct injection-molded moulding forms the light guide plate 14 of tool pattern.Consult Fig. 2, Fig. 2 is the synoptic diagram of known light guide plate 14 injection-molded moulding.To have earlier on a thin sheet of metal 26 smooth formers (or minute surface core rod) 28 of light guide plate pattern, carry out matched moulds then, a formpiston 30 is combined closely with former 28 in injection-molded mould.At this moment, raw material (is generally propylene, be commonly called as acryl) along injection-molded mouthful injection one die cavity 32 of the direction of arrow by formpiston 30, and cooperate injection molding machine, hot press etc. to duplicate board, to finish the making of the light guide plate 14 with pattern, wherein the pattern of light guide plate 14 then can utilize sandblast or etching and processing technology to be formed on the thin sheet of metal 26.
Yet in known light guide plate manufacturing technology, owing to make the mould of light guide plate is to take sandblast or etching and processing to form the pattern of cloudy surface or point-like face structure, because sandblast and etched processing reappearance are not good, so can't effectively improve the reappearance of Mold Making, regular meeting produces photodistributed skew when causing Mold Making; In addition, in the control aspect that light guide plate pattern density distributes, adjust the distribution of light guide plate pattern density if will utilize sandblast face to distribute with different roughness, and then the luminous uniformity coefficient of adjustment backlight assembly, unfortunately can't accurately accomplish to control the processing stand density degree of zones of different on the light guide plate in existing sandblast process technology, if yet only can be made into the sandblast cloudy surface of whole identical roughness, then the luminous uniformity coefficient of backlight assembly is difficult for again being adjusted, and it is all the bottleneck that light guide plate making is now faced.
Summary of the invention
A purpose of the present invention provides a kind of light guide plate and preparation method thereof, to solve the above problems.
Another object of the present invention provides a kind of light conducting plate structure, faces angular brightness light with raising.
The present invention discloses the method for a kind of making one light guide plate, and it comprises and utilize laser rough surface on a template, and utilizes this light guide plate of this template construct, to form a rough surface with micro mirror structure on this light guide plate.
The present invention discloses a kind of side-light type backlight assembly, this side-light type assembly comprises a light source and a light guide plate, light guide plate is installed on the side of this light source, comprise a bottom surface and an exiting surface, this bottom surface is the below of being located at this exiting surface relatively, and this bottom surface is the rough surface for utilizing Laser Processing to form.
Description of drawings
Fig. 1 is the synoptic diagram of known side-light type backlight assembly.
Fig. 2 is the synoptic diagram of the injection-molded moulding of known light guide plate.
Fig. 3 is the synoptic diagram of side-light type backlight assembly of the present invention.
Fig. 4 is the structure side view of light guide plate of the present invention.
Fig. 5 makes the process flow diagram of light guide plate for the present invention.
Fig. 6 is the structural drawing of another light guide plate of the present invention.
The main element symbol description:
50 side-light type backlight assemblies, 52 display panels
54 light guide plate, 56 light sources
58 lampshades, 60 reflecting plates
62 optical material layers, 64 lamp tube fixing piece
66 printing opacity plate bodys, 68 exiting surfaces
70 bottom surfaces, 72 prism structures
Embodiment
Consult Fig. 3, side-light type backlight assembly 50 of the present invention comprises: one is located at the light guide plate 54 of display panel 52 belows; One is located at the light source 56 of a side of light guide plate 54, and it can be many cold cathode fluorescent lamp pipes; One is located at the lampshade 58 in the outside of light source 56; One is located at the reflecting plate 60 of light guide plate 54 belows; One is located at the optical material layer 62 between light guide plate 54 and the display panel 52; And two lamp tube fixing piece 64, the both sides that described two lamp tube fixing piece 64 are installed on light source 56 are used for fixing light source 56; Wherein, lampshade 58 and reflecting plate 60 are to be used for the light that light source 56 is produced is reflexed to light guide plate 54, and light guide plate 54 is to be used for light scatter with light source 56 to optical material layer 62, borrow than provide display panel 52 evenly with the higher light of facing angular brightness.
Consult Fig. 4, light guide plate 54 of the present invention comprises a printing opacity plate body 66, and it can be an acrylic plate, and printing opacity plate body 66 comprises a bottom surface 70 and an exiting surface 68, and bottom surface 70 is belows of being located at exiting surface 68 relatively, and bottom surface 70 is to be a rough surface; Consult shown in Figure 5ly, the manufacture method of light guide plate 54 of the present invention comprises the following steps:
Step 100: the machined parameters of adjusting a pulse laser;
Step 110: utilize this adjusted pulse laser that a rough surface is made on one surface of one template;
Step 120: utilize this template construct light guide plate 54.
Continue to describe in detail the step of said method at this, at first can adjust the machined parameters of this pulse laser earlier, the intensity of pulse laser for example, frequency, hit and send out number etc., hit the sinking degree of this template surface with control laser, density degree etc., wherein pulse laser can be neodymium-yttrium aluminum garnet (Nd-YAG) laser, next see through the surface that pulse laser hits template, to form rough surface, this template is to can be steel or acryl material etc., and the action principle of pulse laser processing is to utilize this template surface of energy hot melt of pulse laser, and because the cohesion of mould material itself with and capillary effect, so part that this laser clashes into can produce micro mirror structure.Next, just can utilize this template as core rod, and use this template to carry out injection-molded moulding or hot-forming to make light guide plate 54, light guide plate 54 bottom surfaces 70 then are the rough surfaces that is produced by the laser beam bump corresponding to this template; Or utilize this template to carry out electroforming and turn over mould and turn over the mould template to form one, utilize this to turn over the mould template again as core rod, and use this to turn over the mould template and carry out injection-molded moulding or hot-forming to make light guide plate 54, this moment, the structure on light guide plate 54 surfaces then was same as by the formwork structure behind the laser beam bump.
Compare with known method for manufacturing light guide plate, the method that the present invention forms the bottom surface of light guide plate structure is to utilize the pulse laser process technology to make the mould of light guide plate, so that bottom surface of light guide plate produces the rough surface with micro mirror structure, and then significantly improve the luminescence efficiency of light guide plate, in addition because the Laser Processing precision height of mould, so can utilize the distribution of adjusting laser processing parameter control light guide plate pattern density, and then the luminous uniformity coefficient of control backlight assembly, and the mould that adopts Laser Processing is because its precision height, so the reappearance of mould is good, meaning can improve the repeatability of Mold Making.In sum, the present invention can effectively increase the luminescence efficiency of light guide plate and the cost of manufacture of quality and reduction light guide plate, thereby helps to improve the market competitiveness and product profit.
Because the bottom surface 70 of light guide plate 54 of the present invention can make the reflection efficiency of light improve by micro mirror structure, and then reach the effect that luminance brightness improves for having the rough surface of micro mirror structure.In addition, the rough surface that the present invention utilizes Laser Processing to form except that the bottom surface that can be emitted as light guide plate, also can be the exiting surface of light guide plate.
In addition, consult shown in Figure 6, the exiting surface 68 of light guide plate 54 can be made up of the wire prism structure 72 that is set up in parallel, after light enters light guide plate 54, after seeing through the rough surface generation diffusion of bottom surface 70, see through prism structure 72 again and produce refraction or reflection,, face angular brightness and improve so that light angle focuses on front (being angular field of view).
The above only is preferred embodiment of the present invention, and all equivalent variations and modifications of being done according to claims scope of the present invention all should belong to the covering scope of patent of the present invention.
Claims (11)
1. method of making a light guide plate comprises:
(a) utilize a laser to hit a surface of a template, to form a rough surface; And
(b) utilize this light guide plate of this template construct.
2. the method for claim 1 is characterized in that: utilize neodymium yttrium aluminium garnet laser in step (a).
3. the method for claim 1, it is characterized in that: the laser in step (a) is to be a pulse laser.
4. the method for claim 1 is characterized in that: also comprise and adjust laser processing parameter to control the roughness of this rough surface.
5. the method for claim 1, it is characterized in that: this rough surface is made up of micro mirror structure.
6. the method for claim 1 is characterized in that: utilize the injection-molded moulding of this template to make this light guide plate in step (b).
7. the method for claim 1 is characterized in that: utilize this light guide plate of the hot-forming making of this template in step (b).
8. the method for claim 1 is characterized in that: utilize this template to carry out electroforming in step (b) and turn over mould and turn over the mould template to form one, utilize this to turn over this light guide plate of mould template construct again.
9. side-light type backlight assembly comprises:
One light source; And
One light guide plate, this light guide plate is installed on the side of this light source, comprises a bottom surface and an exiting surface, and this bottom surface is located at the below of this exiting surface relatively, and this bottom surface is the rough surface of forming for by micro mirror structure.
10. side-light type backlight assembly as claimed in claim 9 is characterized in that: this exiting surface is made up of the wire prism structure that is set up in parallel.
11. a side-light type backlight assembly comprises:
One light source; And
One light guide plate, this light guide plate is installed on the side of this light source, comprises a bottom surface and an exiting surface, and this bottom surface is the below of being located at this exiting surface relatively, and this exiting surface is the rough surface of forming for by micro mirror structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410012018 CN1755450A (en) | 2004-09-28 | 2004-09-28 | Method for making light guide plate and side light type backlight assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410012018 CN1755450A (en) | 2004-09-28 | 2004-09-28 | Method for making light guide plate and side light type backlight assembly |
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| Publication Number | Publication Date |
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| CN1755450A true CN1755450A (en) | 2006-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410012018 Pending CN1755450A (en) | 2004-09-28 | 2004-09-28 | Method for making light guide plate and side light type backlight assembly |
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| CN (1) | CN1755450A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101161400B (en) * | 2007-11-13 | 2010-11-24 | 苏州维旺科技有限公司 | Method for manufacturing mould core of light conducting plate |
| CN102133687A (en) * | 2010-01-26 | 2011-07-27 | 豪晶科技股份有限公司 | Laser processing device |
| CN101825260B (en) * | 2009-02-17 | 2012-05-16 | 苏州京东方茶谷电子有限公司 | Method for manufacturing light guide plate |
| CN102621624A (en) * | 2012-04-24 | 2012-08-01 | 丹阳博昱科技有限公司 | Light guide sheet including optical micro structure and making method |
| CN103231223A (en) * | 2012-06-27 | 2013-08-07 | 田耕 | Method for manufacturing optical element graph substrate, device for realizing collision process of method, and light guiding body component manufactured by applying method |
| CN104930396A (en) * | 2014-03-17 | 2015-09-23 | 云光科技股份有限公司 | Side-light type luminous module structure |
-
2004
- 2004-09-28 CN CN 200410012018 patent/CN1755450A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101161400B (en) * | 2007-11-13 | 2010-11-24 | 苏州维旺科技有限公司 | Method for manufacturing mould core of light conducting plate |
| CN101825260B (en) * | 2009-02-17 | 2012-05-16 | 苏州京东方茶谷电子有限公司 | Method for manufacturing light guide plate |
| CN102133687A (en) * | 2010-01-26 | 2011-07-27 | 豪晶科技股份有限公司 | Laser processing device |
| CN102621624A (en) * | 2012-04-24 | 2012-08-01 | 丹阳博昱科技有限公司 | Light guide sheet including optical micro structure and making method |
| CN103231223A (en) * | 2012-06-27 | 2013-08-07 | 田耕 | Method for manufacturing optical element graph substrate, device for realizing collision process of method, and light guiding body component manufactured by applying method |
| CN104930396A (en) * | 2014-03-17 | 2015-09-23 | 云光科技股份有限公司 | Side-light type luminous module structure |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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