CN100376961C - Method for manufacturing light guide plates - Google Patents
Method for manufacturing light guide plates Download PDFInfo
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- CN100376961C CN100376961C CNB2004100274332A CN200410027433A CN100376961C CN 100376961 C CN100376961 C CN 100376961C CN B2004100274332 A CNB2004100274332 A CN B2004100274332A CN 200410027433 A CN200410027433 A CN 200410027433A CN 100376961 C CN100376961 C CN 100376961C
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- light guide
- guide plate
- groove pattern
- substrate
- manufacturing light
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Abstract
The present invention relates to a method for manufacturing a light guide plate, which comprises the following procedures: providing a material base plate; providing a mold core base plate which is provided with a groove pattern composed of a side surface and a bottom surface; carrying out thermal pressure to the material base plate by the mold core base plate, arranging a gap between the bottom surface of the groove pattern and the material base plate and forming a corresponding protrusive pattern by using the actuating pressure of the mold core base plate and the surface tension of the material base plate; removing the mold core base plate to form a light guide plate. The present invention adopts a non-contact thermal pressure method to manufacture the light guide plate so as to enhance the service life of a mold core.
Description
[technical field]
The invention relates to a kind of method for manufacturing light guide plate, particularly about a kind of method for manufacturing light guide plate that is used for LCD.
[background technology]
In recent years, along with the colorize and the maximization of LCD, its application is more extensive, as notebook computer, various desk-top computer, LCD TV etc.Because of LCD is a kind of passive component, itself can not be luminous, thereby need utilize the light source of a light-source system as LCD, as module backlight (BacklightModule), wherein, light guide plate is a significant components in the module backlight, from the transmission direction that light source sends light beam, converts line source or pointolite to the area source outgoing in order to guiding.
For improving the homogeneity of beam projecting, generally the site is set on the light guide plate surface, in order to the total reflection condition of broken beam, and make its scattering in the light guide plate internal transmission, improving the homogeneity of light guide plate outgoing beam, and then promote the overall performance of module backlight.
At present, the manufacture method of light guide plate mesh point is broadly divided into two kinds of printing-type and non-printing-types, and wherein the printing-type processing procedure is because the printing ink viscosity of net-point printing is wayward, and the product yield is low and the trend that is replaced by non-printing-type processing procedure arranged gradually.Non-printing-type processing procedure is that the leaded light pattern (surface configuration of light guide plate) that will design is produced on the mould, adopts ejection formation or impression to make the light guide plate of providing equal light pattern.
Seeing also Fig. 1, is a kind of industry non-printing-type method for manufacturing light guide plate commonly used, and this method for manufacturing light guide plate comprises the steps: to provide a material substrate 14; The one die substrate 12 with predetermined pattern is provided; Arrive this material substrate 14 by hot-forming pattern transfer with this die substrate 12; Remove this die substrate 12, form light guide plate.
This method is achieved by heat pressing forming machines 10, and this heat pressing forming machines 10 comprises a die substrate rest area 106, a material substrate rest area 108, two heating arrangements 104 and two cooling ducts 102.This material substrate 14 is placed on the material substrate rest area 108 of this heat pressing forming machines 10, die substrate 12 is placed on the die substrate rest area 106 of this heat pressing forming machines 10.With 14 heating of this material substrate, this die substrate 12 and this material substrate 14 exerted pressure of descending feeds water or air subsequently to this cooling duct 102 in, this material substrate 14 is cooled off by this heating arrangement 104.After these material substrate 14 coolings this die substrate 12 is removed.Through above-mentioned steps, this material substrate 14 forms the light guide plate with predetermined optical structure as shown in Figure 2, this hot-press method is transferred to this material substrate 14 surfaces by the predetermined pattern with this die substrate 12, so that the light guide plate surface forms predetermined optical texture.
Yet, for realizing pattern transfer, this hot-press method must impose enough big pressure to this die substrate 12, and this die substrate 12 is fully contacted with these material substrate 14 surfaces, this process increases the loss of this die substrate 12, reduces the serviceable life of this die substrate 12.
[summary of the invention]
For overcome in the non-printing-type method for manufacturing light guide plate of prior art that the die substrate damages easily and serviceable life low problem, the invention provides a kind of die substrate loss that reduces, prolong the die substrate contactless method for manufacturing light guide plate in serviceable life.
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 this method for manufacturing light guide plate may further comprise the steps: material substrate is provided; The die substrate is provided, and this die substrate has groove pattern, and this groove pattern is made up of a side and a bottom surface; Utilize this die substrate that this material substrate is carried out hot pressing, the bottom surface of this groove pattern and this material substrate have at interval, and this material substrate forms the complementary protuberance pattern by the applied pressure of this die substrate and the surface tension of this material substrate; Remove this die substrate, form light guide plate.
Compared to prior art, method for manufacturing light guide plate of the present invention adopts contactless hot-press method, because the bottom surface of die substrate does not contact with material substrate, the optical texture on light guide plate surface is that the surface tension by material substrate is formed, can reduce pressure effect to the die substrate, reduce the loss of die substrate, and and then prolong the serviceable life of improving the die substrate.
[description of drawings]
Fig. 1 is the hot pressing synoptic diagram of prior art method for manufacturing light guide plate.
Fig. 2 is the synoptic diagram of method for manufacturing light guide plate gained light guide plate shown in Figure 1.
Fig. 3 is the hot pressing synoptic diagram of method for manufacturing light guide plate first embodiment of the present invention.
Fig. 4 is the synoptic diagram of method for manufacturing light guide plate gained light guide plate shown in Figure 3.
Fig. 5 is the die substrate synoptic diagram of second embodiment of method for manufacturing light guide plate of the present invention.
Fig. 6 is the die substrate synoptic diagram of the 3rd embodiment of method for manufacturing light guide plate of the present invention.
[embodiment]
Seeing also Fig. 3, is the synoptic diagram of method for manufacturing light guide plate first embodiment of the present invention.Method for manufacturing light guide plate of the present invention may further comprise the steps: a material substrate 34 is provided, its material be polymethylmethacrylate (Polymethyl-methacrylate, PMMA), this material substrate 34 is placed on the material substrate rest area 308 of heat pressing forming machines 30; One die substrate 32 is provided, be placed on the die rest area 306 of this heat pressing forming machines 30, this die substrate 32 has a plurality of parallel grooves 322, and this groove 322 is a rectangle perpendicular to the cross section of its longitudinal direction, and this groove 322 comprises two sides 3224 and a bottom surface 3222; By heating arrangement 304 this material substrate 34 is heated to 90～95 ℃, this die substrate 32 descends, and this material substrate 34 exerted pressure, the bottom surface 3222 that guarantees this groove 322 in the course of exerting pressure has certain interval with this material substrate 34, the material substrate 34 that these groove two sides are 3224 is because applied pressure and surface tension thereof form the raised structures with circular arc top, in cooling duct 302, feed water or air subsequently, with these material substrate 34 coolings; After these material substrate 34 coolings this die substrate 32 is removed.Through above-mentioned steps, this material substrate 34 forms has the light guide plate of optical texture as shown in Figure 4.
(LithographyElectroforming Micro Molding, LIGA) method makes die substrate 32 of the present invention by micro-lithography electroforming model.Its step comprises: little shadow, and behind coating photoresist on the ni substrate, utilize X source to send X-ray and on photoresistance, expose through light shield, after developing, the pattern on the light shield is removed, obtain required photoresistance masterplate; Electroforming deposits to nickel in the photoresistance mould, and photoresistance is removed, and obtains the metal die.The channel patterns of present embodiment die substrate 32 can be designed to it and increase with the distance apart from this die substrate one side at interval and reduce or its groove width increases with the distance apart from this die substrate one side, to promote the outgoing light homogeneity of light guide plate obtained by this method.
Seeing also Fig. 5, is the die substrate synoptic diagram of second embodiment of method for manufacturing light guide plate of the present invention, and the key distinction of itself and first embodiment is that the groove pattern of the die substrate 50 that provides in this manufacture method is a point-like groove pattern 51.The point-like groove pattern 51 of present embodiment die substrate 50 can be designed to its surface density and increase with the distance apart from this die substrate one side, to promote the outgoing light homogeneity that is made light guide plate by this method.
See also Fig. 6, it is the die substrate synoptic diagram of the 3rd embodiment of method for manufacturing light guide plate of the present invention, the key distinction of itself and preceding two embodiments is that the groove pattern of the die substrate 60 that provides in this manufacture method is a toroidal groove pattern 61, this toroidal groove pattern 61 is that arrange by the concentric circles mode at the center with a bit, present embodiment is applicable to that (Light Emitting Diode LED) is the back light module unit structure of light source with light emitting diode.The circular channel patterns 61 of present embodiment die substrate can be designed to it and reduce to promote the outgoing light homogeneity of this light guide plate with the distance increase apart from this concentric circles center of circle at interval.
Method for manufacturing light guide plate of the present invention is not limited to above-mentioned embodiment, and wherein, in micro-lithography electroforming model processing procedure, this die substrate can also be copper, iron or gold base, and the light source of micro-lithography electroforming model processing procedure can also adopt the light source of other wavelength; This die substrate can also utilize dry-etching methods such as splashing etching, ion beam milling, plasma etching and reactive ion etching to make.The material of this material substrate gets final product for the light guide plate material, as polyacrylic resin, polycarbonate, polyvinyl resin or polymethylmethacrylate.
Claims (10)
1. method for manufacturing light guide plate, it may further comprise the steps: material substrate is provided; The die substrate is provided, and this die substrate has groove pattern, and this groove pattern is made up of side and bottom surface; Utilize this die substrate that this material substrate is carried out hot pressing, the bottom surface of this groove pattern and this material substrate have at interval, and this material substrate forms the complementary protuberance pattern by the applied pressure of this die substrate and the surface tension of this material substrate; Remove this die substrate, form light guide plate.
2. method for manufacturing light guide plate as claimed in claim 1 is characterized in that: the material of this material substrate is polymethylmethacrylate, polyacrylic resin or polycarbonate.
3. method for manufacturing light guide plate as claimed in claim 1 is characterized in that: the material of this die substrate is nickel or copper.
4. method for manufacturing light guide plate as claimed in claim 1 is characterized in that: this groove pattern is the strip groove pattern.
5. method for manufacturing light guide plate as claimed in claim 4 is characterized in that: this strip groove pattern is arranged parallel to each other.
6. method for manufacturing light guide plate as claimed in claim 5 is characterized in that: the interval of this strip groove pattern reduces gradually towards a direction.
7. method for manufacturing light guide plate as claimed in claim 1 is characterized in that: this groove pattern is a circle shape groove, and this circle shape groove is arranged with the concentric circles form.
8. method for manufacturing light guide plate as claimed in claim 7 is characterized in that: the interval of this circle shape groove pattern with apart from this concentric circles distance of center circle from increase reduce.
9. method for manufacturing light guide plate as claimed in claim 1 is characterized in that: this groove pattern is the point-like groove pattern.
10. method for manufacturing light guide plate as claimed in claim 9 is characterized in that: the surface density of this point-like groove pattern increases gradually towards a direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100274332A CN100376961C (en) | 2004-05-28 | 2004-05-28 | Method for manufacturing light guide plates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100274332A CN100376961C (en) | 2004-05-28 | 2004-05-28 | Method for manufacturing light guide plates |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1704812A CN1704812A (en) | 2005-12-07 |
| CN100376961C true CN100376961C (en) | 2008-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100274332A Expired - Fee Related CN100376961C (en) | 2004-05-28 | 2004-05-28 | Method for manufacturing light guide plates |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010164914A (en) | 2009-01-19 | 2010-07-29 | Hitachi Displays Ltd | Liquid crystal display device |
| CN105835552B (en) * | 2016-03-23 | 2018-07-20 | 深圳市科彩印务有限公司 | A kind of PVC chip base production methods being suitable for directly estimating radium-shine material printing aberration |
| CN117464186B (en) * | 2023-11-27 | 2024-07-26 | 苏州天禄光科技股份有限公司 | Transfer printing die for optical material, processing device and processing technology thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5230990A (en) * | 1990-10-09 | 1993-07-27 | Brother Kogyo Kabushiki Kaisha | Method for producing an optical waveguide array using a resist master |
| WO2001011422A1 (en) * | 1999-08-10 | 2001-02-15 | Kyounghee Choi | Method for making backlit light guide plate for liquid crystal display |
| CN2467323Y (en) * | 2001-03-16 | 2001-12-26 | 清华大学 | Non-contact heat-pressing device for the fabrication of layered solids |
| JP2002292635A (en) * | 2001-03-29 | 2002-10-09 | Nippon Columbia Co Ltd | Method for manufacture of stamper and light guiding board |
| JP2003245925A (en) * | 2002-02-26 | 2003-09-02 | Towa Corp | Processing method for mold for molding light guide plate, die and light-guide plate |
| TW569061B (en) * | 2002-08-01 | 2004-01-01 | Jia-Lung Guo | Mold formation method |
-
2004
- 2004-05-28 CN CNB2004100274332A patent/CN100376961C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5230990A (en) * | 1990-10-09 | 1993-07-27 | Brother Kogyo Kabushiki Kaisha | Method for producing an optical waveguide array using a resist master |
| WO2001011422A1 (en) * | 1999-08-10 | 2001-02-15 | Kyounghee Choi | Method for making backlit light guide plate for liquid crystal display |
| CN2467323Y (en) * | 2001-03-16 | 2001-12-26 | 清华大学 | Non-contact heat-pressing device for the fabrication of layered solids |
| JP2002292635A (en) * | 2001-03-29 | 2002-10-09 | Nippon Columbia Co Ltd | Method for manufacture of stamper and light guiding board |
| JP2003245925A (en) * | 2002-02-26 | 2003-09-02 | Towa Corp | Processing method for mold for molding light guide plate, die and light-guide plate |
| TW569061B (en) * | 2002-08-01 | 2004-01-01 | Jia-Lung Guo | Mold formation method |
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| CN1704812A (en) | 2005-12-07 |
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