CN1621906A - Method of making light guiding plate - Google Patents
Method of making light guiding plate Download PDFInfo
- Publication number
- CN1621906A CN1621906A CN 200310112441 CN200310112441A CN1621906A CN 1621906 A CN1621906 A CN 1621906A CN 200310112441 CN200310112441 CN 200310112441 CN 200310112441 A CN200310112441 A CN 200310112441A CN 1621906 A CN1621906 A CN 1621906A
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- light guide
- base material
- guide plate
- die
- guide base
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Abstract
The light guiding board making process includes the following steps: providing one hot press including one press head and one bench; providing one mold punch with fine pattern in the surface opposite to the bench and fixing the mold punch to the press head; setting one light guiding base material onto the bench with one surface opposite to surface of the mold punch with fine pattern; heating the light guiding base material; and pressing the light guiding base material in certain pressure.
Description
[technical field]
The invention relates to a kind of method for manufacturing light guide plate, particularly a kind of method for manufacturing light guide plate that is applicable to large-size light-conducting plate.
[background technology]
Module backlight mainly is applied as the light-source system of LCD, its principle of work is: pointolite or line source emit beam to enter in the light guide plate and propagate, bottom surface and reflecting plate through light guide plate with optical texture design, the light diffusion is penetrated, and be evenly distributed in the light-emitting zone, with the optical characteristics requirement of fluid,matching crystal display.
The processing procedure of light guide plate mainly is divided into two kinds of printing-type and non-printing-types.Printing-type is to apply ink dot to form specific pattern in the bottom surface of light guide plate, and it destroys the total reflection condition of incident ray, and then makes light evenly penetrate light guide plate.But light must see through light guide plate ability contact patterns in this kind light guide plate, thereby the intensity of reflection ray is weakened; In addition, in printing process since printing-ink apply to be difficult for evenly, thereby influence the dispersion effect of light, thereby can't provide uniform light for module backlight, influence the effect of liquid crystal display.
But not the printing-type processing procedure at present comparatively proven technique be to adopt polymethacrylate resin (Polymethyl-methacrylate, PMMA) ejection formation of material (InjectionMolding) is provided with a plurality of convex-concave patterns to reach the purpose of diffusion light in the bottom surface of light guide plate with cutting or direct injection mode.Therefore because incident ray can directly contact with convex-concave pattern, the light intensity of reflection is greater than the printing-type light guide plate, and saves print routine in manufacture process, therefore has to expand to penetrate that effect is good, the simple advantage of processing procedure.
But this kind injection molding method only has ripe application in the manufacturing of small-medium size light guide plate.Along with the appearance of LCD TV, the demand of large-size light-conducting plate and module backlight is increased day by day, and when making light guide plate, then have the quality and the homogeneity question of ejection formation product with traditional device for injection moulding.
Prior art promptly has the improvement of making the method for light guide plate to injection molding method, sees also Fig. 1, is No. 542360 employed device for injection moulding of disclosed method for manufacturing light guide plate of TaiWan, China patent at bulletin on July 11st, 2003.This device comprises injection device 10 and mould 20.Wherein this injection device 10 comprises the motor 13 of screw rod 12, the drive screw 12 of injection cylinder 11, rotatable driving in machine barrel 11, supplies with the hopper 14 of transparent resin material and be arranged on the well heater 15 of machine barrel 11 outside surfaces in machine barrel 11.This mould 20 comprises cover half 21, dynamic model 22, connects the passage 25 of 22 two leading sections of cover half 21 and dynamic model, is formed with in cover half 21 by the runner 23 of molten resin and the cast gate 24 that is communicated with runner 23, wherein, this cover half 21 and dynamic model 22 formation one are used for the die cavity 26 of moulded products, and dynamic model 22 is provided with the outstanding element 27 that takes out molded product usefulness.At least the one side of the die cavity 26 of this mould 20 is provided with concavo-convex or saw-tooth like pattern, so that corresponding convex-concave shape or the saw-tooth like pattern of forming in a surface of light guide plate.
Being characterized as of this method for manufacturing light guide plate: the machine barrel 11 that the die cavity 26 of this mould 20 is communicated in injection device 10, in this machine barrel 11, supply with transparent resin material and make its fusion, and at the cast gate 24 of mould 20 with viscosity 50～5, the molten resin of 000Pa.sec scope from machine barrel 11 with 1～15cm
3The ejaculation rate of/sec scope is filled in the die cavity 26 of mould 20 continuously.
This method for manufacturing light guide plate is by reducing the ejaculation rate of molten resin, though can directly make thickness, dimensional stability and all excellent light guide plate of the transparency, but, because it still adopts device for injection moulding, increase along with the light guide plate size, the also corresponding increase in space that this device for injection moulding is occupied, the cost of developing this kind main equipment also will increase; Again because the light guide plate size is bigger, higher to the designing requirement of the cast gate of ejection shaping die, runner, on the volume production of light guide plate, still there is difficulty.
[summary of the invention]
For the manufacturing cost height that overcomes the prior art light guide plate, the problem that is difficult for volume production, the invention provides a kind of method for manufacturing light guide plate that is applicable to the large-size light-conducting plate volume production.
The technical scheme that technical solution problem of the present invention is adopted is: a kind of method for manufacturing light guide plate is provided, and it may further comprise the steps: a hot-press arrangement is provided, and this hot-press arrangement comprises a pressure head and a worktable; One die is provided, and is fixed on the pressure head of this hot-press arrangement, a surface of the relative worktable of this die has fine pattern; One light guide base material is arranged on the worktable, the surface that a surface that makes this light guide base material and this die have a fine pattern over against; This light guide base material is heated; With certain pressure with die by being pressed in the light guide base material surface.
Compared to prior art, because method for manufacturing light guide plate of the present invention is to adopt hot-press method, it is pushed after being heated near molten condition to light guide base material, the pressure that does not need to provide very big can make the light guide plate with fine pattern, therefore be easy to make, be fit to the volume production of large-size light-conducting plate.
[description of drawings]
Fig. 1 is the diagrammatic cross-section of the used device for injection moulding of prior art light guide plate ejection formation manufacture method.
Fig. 2 is the process flow diagram of method for manufacturing light guide plate of the present invention.
Fig. 3 is the diagrammatic cross-section of the used hot-press arrangement of method for manufacturing light guide plate of the present invention.
Fig. 4 is the schematic perspective view of the used die of method for manufacturing light guide plate of the present invention.
Fig. 5 is the schematic perspective view of the obtained light guide plate of method for manufacturing light guide plate of the present invention.
[embodiment]
Consulting Fig. 2, is the process flow diagram of method for manufacturing light guide plate of the present invention.Below in conjunction with Fig. 3, Fig. 4 and Fig. 5 method for manufacturing light guide plate of the present invention is specifically described.
(1) provides hot-press arrangement
Consulting Fig. 3, is the diagrammatic cross-section of the used hot-press arrangement of method for manufacturing light guide plate of the present invention, and this hot-press arrangement comprises a pressure head 41, a worktable 42 and a plurality of this worktable 42 well heater 43 and 44 all around that is positioned at, and this worktable 42 possesses heating function simultaneously.This pressure head 41 worktable 42 relatively moves up and down.
(2) provide die with fine pattern
Consult Fig. 4, this die 50 is a writing board shape, and a surface of its relative worktable 42 has fine pattern 51, and in the present embodiment, this fine pattern 51 is a size from the V-arrangement projection of 50 nanometers to 40 micron.This die 50 is fixed on the pressure head 41 of this hot-press arrangement in modes such as vacuum suction, Electrostatic Absorption or bondings, and makes fine pattern 51 in the face of worktable 42.
The material of this die 50 can be hard materials such as nickel, stainless steel, silicon, polymkeric substance or glass.The fine pattern 51 of this die 50 also can be the groove of size from semicircle spherical protuberances, half-cylindrical projection, square protrusion, half pyramid projection and the above shape of 50 nanometers to 40 micron.
(3) light guide base material is fixed on the worktable
One light guide base material 60 is provided, and it is fixed on the worktable 42 in modes such as vacuum suction, Electrostatic Absorption or bondings, the surface that a surface that makes this light guide base material 60 and this die 50 have a fine pattern 51 over against.This light guide base material 60 is plate shaped resin material, as polymethacrylate resin, polycarbonate etc.
(4) light guide base material is heated
Possess worktable 42 and well heater 43 and 44 of heating function by temperature control equipment (figure does not show) control, this light guide base material 60 is evenly heated.Heating-up temperature should be higher than the glass transfer point (Glass Transition Temperature) of light guide base material, is advisable but be lower than its fusing point, so that this light guide base material 60 is near molten condition.
(5) with certain pressure with die by being pressed in the light guide base material surface
Move to direction by drive unit (figure does not show) drive ram 41 near worktable 42, this pressure head 41 apply certain pressure with die 50 by being pressed in light guide base material 60 surfaces, make the fine pattern 51 of this die 50 be pressed into light guide base material 60, because this light guide base material 60 is near molten condition, so the pressure that does not need to provide very big can make the light guide plate 80 (consulting Fig. 5) with fine pattern 61.
The fine pattern 61 of this light guide plate 80 is fine pattern 51 complementary formations with die 50, when the fine pattern 51 of this die 50 is the groove of semicircle spherical protuberances, half-cylindrical projection, square protrusion, half pyramid projection and above shape, the fine pattern of this light guide plate 80 will correspond to the shape for lugs of semi-round ball connected in star, semi-cylindrical recesses, square groove, half pyramid groove and above shape.
Because method for manufacturing light guide plate of the present invention adopts hot-press method, it is pushed after being heated near molten condition to light guide base material 60, the pressure that does not need to provide very big can make the light guide plate with fine pattern, therefore is easy to make, and is fit to the volume production of large-size light-conducting plate.
Method for manufacturing light guide plate of the present invention also can with die by comprising further after being pressed in the light guide base material surface that the side to light guide base material carries out processing steps, as: will have four sides of the surface of fine pattern intersecting with this light guide base material and be processed as reflecting surface or plating reflectance coating; To be processed as incidence surface with the surperficial facing surfaces that this light guide base material has a fine pattern.
Claims (10)
1. method for manufacturing light guide plate, it may further comprise the steps: a hot-press arrangement is provided, and this hot-press arrangement comprises a pressure head and a worktable; One die is provided, and is fixed on the pressure head of this hot-press arrangement, a surface of the relative worktable of this die has fine pattern; One light guide base material is arranged on the worktable, the surface that a surface that makes this light guide base material and this die have a fine pattern over against; This light guide base material is heated; With certain pressure with die by being pressed in the light guide base material surface.
2. method for manufacturing light guide plate according to claim 1 is characterized in that: the fine pattern of this die is V-arrangement projection, semicircle spherical protuberances, half-cylindrical projection, cylindrical projections, square protrusion or half pyramid projection.
3. method for manufacturing light guide plate according to claim 1 is characterized in that: the size of this fine pattern is between 50 nanometers to 40 micron.
4. method for manufacturing light guide plate according to claim 1 is characterized in that: the fine pattern of this die is a groove.
5. method for manufacturing light guide plate according to claim 1 is characterized in that: the step that this light guide base material is heated is by this worktable light guide base material to be heated.
6. method for manufacturing light guide plate according to claim 5 is characterized in that: the side in light guide base material further is provided with a plurality of well heaters, and it heats light guide base material simultaneously in conjunction with worktable.
7. method for manufacturing light guide plate according to claim 1 is characterized in that: this light guide base material is a resin material.
8. method for manufacturing light guide plate according to claim 7 is characterized in that: this resin material is a polymethacrylate resin.
9. method for manufacturing light guide plate according to claim 7 is characterized in that: this resin material is a polycarbonate.
10. method for manufacturing light guide plate according to claim 1 is characterized in that: it is further comprising the step of the side of light guide base material being plated reflectance coating with die by after being pressed in the light guide base material surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101124412A CN100468150C (en) | 2003-11-29 | 2003-11-29 | Method of making light guiding plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101124412A CN100468150C (en) | 2003-11-29 | 2003-11-29 | Method of making light guiding plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1621906A true CN1621906A (en) | 2005-06-01 |
| CN100468150C CN100468150C (en) | 2009-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101124412A Expired - Fee Related CN100468150C (en) | 2003-11-29 | 2003-11-29 | Method of making light guiding plate |
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| Country | Link |
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| CN (1) | CN100468150C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101554761B (en) * | 2008-04-09 | 2011-06-08 | 深圳市德仓科技有限公司 | Processing method of light guide plate of hot press molding liquid crystal display backlight module illuminating system |
| CN102981210A (en) * | 2012-11-26 | 2013-03-20 | 田耕 | Method for processing micro structure of incidence end face of light guide member and processing device applying method |
| CN103885114A (en) * | 2012-12-21 | 2014-06-25 | 株式会社S·K·G | Light guide member and method of manufacturing light guide member |
| CN111016040A (en) * | 2019-12-31 | 2020-04-17 | 叶挺伟 | Film forming device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1151387C (en) * | 2000-05-19 | 2004-05-26 | 明基电通股份有限公司 | Making process of light-homogenizing pattern for back lighting board |
| CN1187639C (en) * | 2001-07-13 | 2005-02-02 | 兴隆发电子股份有限公司 | Optical guide plate and method for making its module core |
| JP2003255341A (en) * | 2002-03-04 | 2003-09-10 | Seiko Instruments Inc | Method for manufacturing display device and light guide plate |
-
2003
- 2003-11-29 CN CNB2003101124412A patent/CN100468150C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101554761B (en) * | 2008-04-09 | 2011-06-08 | 深圳市德仓科技有限公司 | Processing method of light guide plate of hot press molding liquid crystal display backlight module illuminating system |
| CN102981210A (en) * | 2012-11-26 | 2013-03-20 | 田耕 | Method for processing micro structure of incidence end face of light guide member and processing device applying method |
| CN103885114A (en) * | 2012-12-21 | 2014-06-25 | 株式会社S·K·G | Light guide member and method of manufacturing light guide member |
| CN111016040A (en) * | 2019-12-31 | 2020-04-17 | 叶挺伟 | Film forming device |
| CN111016040B (en) * | 2019-12-31 | 2022-01-25 | 叶挺伟 | Film forming device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100468150C (en) | 2009-03-11 |
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