KR20100066251A - Method of manufacturing pattern of prism sheet and light guide panel - Google Patents

Method of manufacturing pattern of prism sheet and light guide panel Download PDF

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Publication number
KR20100066251A
KR20100066251A KR1020080128953A KR20080128953A KR20100066251A KR 20100066251 A KR20100066251 A KR 20100066251A KR 1020080128953 A KR1020080128953 A KR 1020080128953A KR 20080128953 A KR20080128953 A KR 20080128953A KR 20100066251 A KR20100066251 A KR 20100066251A
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KR
South Korea
Prior art keywords
pattern
light guide
prism sheet
guide plate
laser beam
Prior art date
Application number
KR1020080128953A
Other languages
Korean (ko)
Inventor
배재남
Original Assignee
(주)에이치비콥
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Filing date
Publication date
Application filed by (주)에이치비콥 filed Critical (주)에이치비콥
Publication of KR20100066251A publication Critical patent/KR20100066251A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
    • B23K26/359—Working by laser beam, e.g. welding, cutting or boring for surface treatment by providing a line or line pattern, e.g. a dotted break initiation line
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays
    • 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
    • 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
    • G02B6/0065—Manufacturing aspects; Material aspects

Abstract

PURPOSE: A method of manufacturing a pattern of a prism sheet and a light guide panel is provided to form a prism pattern of a spiral shape a light guide pattern by reflecting and condensing a laser beam on a processing surface. CONSTITUTION: A position signal, correspond to the coordinate of each pattern which is formed on a light guide panel or a prism sheet based on data stored in a pattern design system, is transmitted to a header(S600). A laser beam, outputted from the laser system which is synchronized with the movement of the header part, is reflected to the prism sheet or the light guide plate(S601). A pattern is formed by a laser beam which is reflected to a manufacturing surface of the prism sheet and the light guide panel. The laser beam reflected from the header is condensed on the prism sheet and the light guide panel to form a pattern of a spiral shape groove(S602).

Description

Pattern manufacturing method of prism sheet or light guide plate {METHOD OF MANUFACTURING PATTERN OF PRISM SHEET AND LIGHT GUIDE PANEL}

The present invention relates to a pattern manufacturing method of a prism sheet or a light guide plate used for a backlight such as a liquid crystal display, and more particularly, a processing surface of a prism sheet or a light guide plate fixed to an upper surface of a stage rotating at a high speed and integrally rotating with the stage. The present invention relates to a pattern manufacturing method of a prism sheet or a light guide plate for forming a spiral prism pattern or a light guide pattern by reflecting and condensing a laser beam onto the laser beam.

In general, a prism sheet or a light guide panel is a plate that provides a path for condensing or uniformly scattering and diffusing light emitted from a light source to have a constant directionality, and is a light receiving flat panel display such as a liquid crystal display device. It is applied to the surface light source device used for an apparatus, a lighting signboard, etc.

As a surface light source device using a light guide plate, a method of disposing a cold cathode fluorescent lamp (CCFL) or an LED is widely used. Such a surface light source device is Korean Patent Application Nos. 195-33115, 2001-25870, 2001-53844, 2002-26023, 2002-28919, 2003-03466, 2004-73443 , 2005-12556, 2006-32631, 2006-135207, and the like.

1 is a cross-sectional view schematically showing a conventional surface light source device.

Referring to FIG. 1, the conventional surface light source device 10 includes a light guide plate 11, a reflector 12 disposed below the light guide plate 11, a light source 13 provided on sidewalls of the light guide plate 11, and a light source 13. It includes a reflector 14 to cover the diffusion plate 16 provided on the light guide plate 11, the prism sheet 17 provided on the diffusion plate 16. As the light source 13, a cold cathode fluorescent lamp or an LED may be used. On the other hand, the light guide plate 11 is formed with a plurality of pattern portions 15 printed using ink to scatter and diffuse light incident on one side thereof.

Looking at the path of the light of the surface light source device 10 configured as described above, the light irradiated from the light source 13 is incident to the light guide plate 11, the light incident to the light guide plate 11 is indicated by an arrow as shown by the arrow. After the light is guided through 11), the reflective plate 12 and the pattern portion 15 reflect the light having relatively uniform illuminance at each portion. The reflected light passes through the diffuser plate 16 and passes through the prism sheet 17 to the front.

However, the pattern portion 15 formed by the printing method has the following problems.

The light guide plate of the printing method is inconvenient in the manufacturing and printing process of the ink for forming the pattern portion 15, and has a high defective rate such that some of the printed portions are dropped or smeared. As a result, the yield of the pattern portion 15 is as low as approximately 90%. In addition, since the light guide plate 11 of the printing method should be recycled after removing the printing pattern, it is difficult to recycle and thus is not environmentally friendly. In particular, since the pattern portion 15 uses the light reflection of the printed ink material itself, it inevitably generates a light absorption phenomenon of the ink material itself. This light absorption phenomenon reduces the light efficiency of the surface light source device.

In order to solve the above problems, a non-printing method was applied. As a non-printing method, an injection molding method using a mold may be used. In this injection molding method, a plurality of mold modifications must be repeated to optimize a pattern. Therefore, there is a disadvantage that the development cost increases. In addition, as the production period of the mold becomes longer, it is difficult to meet the development demand that the product model changes very rapidly. In addition, when the thickness of the product becomes thick, the cooling time after injection has a problem of lengthening by several minutes, thus decreasing productivity. On the contrary, when the thickness of the product is very thin and the area is large, perfect injection is not performed. This happens.

In order to improve the above problems, there is a method of processing a pattern portion using a laser. In the case of using a laser, it is not affected by the thickness variation of the material, and can be processed to a desired dimension, and there is no need for an additional device such as a mold or a mask. In addition, since a separate material is not applied to the pattern, it is recyclable and environmentally friendly. However, since all the patterns must be processed by moving the mirror, the processing time is very long.

In addition, in the case of the prism sheet is very difficult to manufacture, it has a disadvantage that the cost is expensive, especially when the large area has a problem that the price increases even more. In addition, in the case of the slim backlight, the light source is used on all four sides, but the conventional prism sheet has a directional direction only in one direction. Therefore, it has the disadvantage of being able to use only the light in the vertical direction. An additional cost problem arises in that the prism sheet must be used overlaid in 90 degree phases.

The present invention is to solve the above problems, it is fixed to the upper surface of the stage rotating at high speed by reflecting and condensing the laser beam on the processing surface of the prism sheet or the light guide plate that is integrally rotated, the spiral prism An object of the present invention is to provide a pattern manufacturing method of a prism sheet or a light guide plate for forming a pattern or a light guide pattern.

According to an embodiment of the present invention for achieving the above object, a method of manufacturing a pattern of a prism sheet or light guide plate is disclosed, which method (a) is connected to a pattern design system in which data for a pattern to be formed on the prism sheet or light guide plate is stored. In the control system, transmitting the position signal corresponding to the coordinate value of each pattern to be formed in the prism sheet or the light guide plate to the header part based on the data stored in the pattern design system; Reflecting the laser beam output from the laser system to the prism sheet or the light guide plate in the header part mechanically moving along the central fixed axis according to the position signal transmitted from the system, and (c) Free to be fixed to the upper surface of the stage rotating at high speed to rotate integrally with the stage And forming a pattern on the processed surface of the sheet or light guide plate by the reflected laser beam, wherein the laser beam reflected from the header portion, together with the high speed rotation of the stage and the movement of the header portion moving along the central fixed axis, It is characterized by forming a pattern having a groove in the form of a spiral is collected on the processing surface of the prism sheet or the light guide plate.

Preferably, the optical unit included in the header unit for reflecting the laser beam has a structure in which the angle of incidence of the laser beam output from the laser system is adjustable.

Preferably, the spiral groove is characterized by being a solid line or a dotted line.

Preferably, the pattern is characterized in that the length of the grooves is gradually formed longer away from the light source, or the pitch between the grooves is gradually narrowed away from the light source.

Preferably, the pattern is characterized in that the groove length is gradually longer and the pitch between the grooves is gradually narrower as the distance from the light source.

Preferably, the pattern is characterized in that the width between the grooves is gradually narrowed away from the light source.

Preferably, the pattern is characterized in that the groove length is gradually formed as the distance from the light source is gradually formed, the pitch between the grooves is formed narrow, or the width between the grooves is formed narrow.

Preferably, the intensity of the laser beam output from the laser system can be adjusted according to the position on the processing surface of the prism sheet or the light guide plate.

As described above, the method of rotating the prism sheet or the light guide plate at a high speed and processing the laser can process the prism sheet or the light guide plate in a very fast time, unlike the conventional method, thereby greatly increasing the productivity. . The size of the device can also be reduced compared to the prior art, which can significantly reduce the cost of the device.

In addition, both the prism pattern and the light guide pattern have a directivity perpendicular to the center of the prism sheet or the light guide plate due to the spiral pattern shape. Therefore, in the case of the slim backlight having the light source on the four surfaces, the luminance characteristic toward the center has the best pattern characteristic.

In addition, since the desired incidence angle can be obtained by tilting the optical unit, the cross-sectional angle of the pattern can be controlled to a desired angle, thereby obtaining a larger prism effect. In addition, since all of these prisms have a structure that uniformly faces the center of the light guide plate, an effective brightness increase can be expected.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the pattern manufacturing method of the prism sheet or light guide plate according to the present invention will be described in detail. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various forms, and only the present embodiments are intended to complete the disclosure of the present invention and to those skilled in the art. It is provided for complete information.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

2 is an exploded perspective view of a surface light source device to which a prism sheet or a light guide plate according to an exemplary embodiment of the present invention is applied.

Referring to FIG. 2, the light guide plate 202 is provided in the surface light source device 210, and a pattern portion 202a is formed on the lower surface of the light guide plate 202. The lower portion of the light guide plate 202 is provided with a reflecting plate 204 that can reflect incident light upward. At least one light source 203 for emitting light to the light guide plate 202 is provided on the sidewall of the light guide plate 202. The light guide plate 202 is further provided with a diffusion plate 201 for scattering and diffusing light, and a prism sheet 200 having a prism pattern 200a for controlling the direction of light on the diffusion plate 201. ) Is installed.

On the other hand, the light emitted from the light source 203 is incident to the side of the light guide plate 202 and the light incident into the light guide plate 202 is guided and moved inside the light guide plate 202 by the total reflection effect. Among the guided lights, the light reaching the pattern 202a is emitted to the outside of the light guide plate 202 by an incident angle exceeding the total reflection threshold angle. The light emitted from the pattern 202a passes through the reflecting plate 204, passes through the light guide plate 202, passes through the diffusion plate 201 on the upper surface of the light guide plate 202, and enters the prism sheet 200. It becomes effective light which shows the high brightness which has high directionality through 200). In this case, the portion of the pattern portion 202a close to the light source 203 has a low density and a portion far from the light source has a high density to form a uniform surface light source.

3 is a configuration diagram of a pattern forming apparatus for forming a pattern on a prism sheet or a light guide plate according to an embodiment of the present invention, and FIGS. 4 and 5 are shapes of pattern portions formed by the pattern forming apparatus of FIG. 3. It is shown.

2 to 5, the pattern forming apparatus includes a pattern design system 300 storing data about a pattern to be formed on the prism sheet or the light guide plate, and a prism sheet or light guide plate 340 connected to the pattern design system 300. A control system 310 for outputting a position signal corresponding to the coordinate value of each pattern to be formed in the laser beam and a laser beam control signal synchronized with the movement of the header unit 332, and a laser beam control signal output from the control system 310; Laser system 320 for outputting a laser beam by the light source, a header moving unit 330 for reflecting and condensing the laser beam output from the laser system 320, and a scanning surface 341 of the prism sheet or the light guide plate 340 And an exhaust unit 370 that sucks and discharges the vapor evaporated from) to prevent absorption or scattering of the laser beam due to the smoke, and is located on a lower surface of the prism sheet or the light guide plate 340, and the prism sheet or light guide plate. A stage 350 for fixing the 340, a high speed rotation driving unit 351 located on the bottom surface of the stage 350 to rotate the stage 350 at high speed, and a vacuum passage part 351 inside the stage 350. It includes a vacuum unit 380 for completely adsorbing one surface of the prism sheet or the light guide plate 340 through.

Meanwhile, the header moving part 330 is attached to the central fixed axis 331 and the central direction fixed axis 331 to reflect the laser beam output from the laser system 320 to the header part 332. A mirror portion 337 including a 338 and a center portion fixed shaft 331 coupled to the center fixed shaft 331 according to a position signal output from the control system 310 to move in the direction of the center fixed shaft 331, and the mirror And a header portion 332 for reflecting and condensing the laser beam reflected by the portion 337 to the prism sheet or the light guide plate 340. The header unit 332 collects the laser beam reflected from the second mirror 335 and the second mirror 335 to reflect the laser beam reflected from the mirror unit 337 to the prism sheet or the light guide plate 340. It includes an optical unit 334 including a lens 336 to. As shown in FIG. 3, the optical unit 334 is configured to be tiltable in a predetermined direction b.

The prism sheet or the light guide plate 340 is mounted on the stage 350 having the high speed rotation driver 360 by vacuum suction method. The surface on which the prism pattern or the light guide pattern is to be formed on the prism sheet or the light guide plate 340 is positioned to face the header moving part 330 where the laser beam is scanned. In the prism sheet or the light guide plate 340, each pattern 341 may be formed by scanning a laser beam using the laser system 320, and the laser beam emitted from the laser system 320 may form the optical unit 334. To be reflected and condensed. At this time, the laser beam is reflected at the required angle by the mirror 335 in the optical unit 334, and the reflected beam is made again into a laser beam spot having a desired diameter by using the lens 336. In this case, as illustrated in FIG. 3, the optical unit 334 may tilt the central axis not shown in a predetermined direction b at a desired angle. When the central axis is tilted, the laser beam is tilted and the incident angle of the laser focused on the prism sheet or the light guide plate 340 is changed. If the angle of incidence of the laser is changed, the optical characteristics may be changed because the shape of the cross section of the groove processed by the laser is changed.

At this time, the laser beam is scanned by the header part 332 having the optical part 334 including the mirror part 335 and the lens part 336 of the prism sheet or the light guide plate 340 along the central fixed axis 331. It is made by moving in the center direction (c). The header part 332 is moved in the center direction c of the prism sheet or the light guide plate 340 by receiving the position signal from the control system 310. The laser system 320 receives a switching signal synchronized with the position signal from the control system 310 and outputs a laser beam. The laser beam moves to the header portion 332 through the mirror portion 337, is focused by the optical portion 334 of the header portion 332, and then output to the prism sheet or the light guide plate 340.

The stage 350 is rotated at a high speed integrally with the prism sheet or the light guide plate 340 by the high speed rotation driver 360 as shown by reference numeral a of FIG. 3, which causes the stage 350 to be moved on the prism sheet or the light guide plate 340. As shown in FIG. 4 and FIG. 5, a pattern 341 having a groove in the form of a solid spiral line or a dotted line is implemented.

The pattern portion 341 is formed over the entire region of the prism sheet or the light guide plate 340 so as to effectively diffuse and scatter the light guided from the light source 203 to the prism sheet or the light guide plate 340. In particular, the shape of the pattern portion 341 may be a dot shape consisting of grooves of a predetermined depth, a dotted spiral consisting of intermittent grooves of a predetermined depth, or a connecting spiral consisting of continuous grooves. In addition, the pattern portion 341 may gradually increase in size to increase light diffusion and scattering rate as it moves away from the light source 203, or may gradually decrease in pitch between patterns.

The line width of each groove of the prism pattern portion or the light guide pattern portion 341 processed by the laser device is preferably about 50 to 500 micrometers, and the depth of each groove is about 20 to 200 micrometers.

The plate 350 on which the prism sheet or the light guide plate 340 is mounted is provided with a vacuum unit 380 so as to completely adsorb one surface opposite to the region where the pattern 341 is formed.

The vacuum unit 380 is provided with a plurality of vacuum passage units 351 to vacuum-adsorb the prism sheet or the light guide plate 340 through the stage 350. The vacuum unit 380 is a pump system, such as a mechanical vacuum pump, a momentum transfer vacuum pump, or a hydraulic vacuum pump, and the lower surface of the prism sheet or the light guide plate 340 through the vacuum passage portion 351 by the pumping force of the pump. It is possible to adsorb vacuum. Thus, the pattern 341 can be formed by scanning a laser beam in the state which fixed the prism sheet or the light-guide plate 340 by the vacuum suction means.

On the other hand, since the etching method by scanning the laser beam on the acrylic or polycarbonate resin is a method of heating the surface of the resin with strong energy, smoke is generated due to the evaporated resin material. Such smoke may cause absorption or scattering of the laser beam during the scanning process of forming a pattern on the parent material. This reduces the energy of the laser beam being scanned, which interferes with the processing of the desired pattern. In order to eliminate this phenomenon, an exhaust part 370 is additionally installed on the header part, the prism sheet, or the light guide plate 340. The exhaust part 370 sucks and discharges the smoke of the resin material, which is an element material evaporated from the scanning surface of the prism sheet or the light guide plate 340, to prevent the smoke from absorbing or scattering the laser beam.

According to a feature of the present invention, an intermittent shape pattern 341 is formed on the lower surface of the prism sheet or the light guide plate 340 over the entire area of the light guide plate 340 by laser processing so as to more effectively scatter and diffuse incident light. Formed. The pattern 341 made of grooves is a collection of discrete shapes spaced at a constant pitch and is formed according to a predetermined design rule as it moves away from the light source. As shown in Fig. 5, the pitch P of the groove is the distance between each groove in the vertical direction and the direction in which the light source 203 is disposed, and the length L of the groove is in the horizontal direction and the direction in which the light source is disposed. The size of each groove, and the width (W) of the grooves means the distance between the grooves in the horizontal direction and the direction in which the light source is disposed.

On the other hand, it is possible to adjust the intensity of the laser beam from the laser system according to the processing position on the prism sheet or the light guide plate 340, in which case the intensity of the laser beam can be varied according to the laser beam control signal transmitted from the control system 310. have. By doing in this way, since pattern processing of a depth different according to a machining position is possible, higher processing efficiency can be obtained. In addition, the number of processing patterns can be reduced, so that the processing time can be shortened.

FIG. 6 is a flowchart illustrating a method of forming a pattern on a prism sheet or a light guide plate according to an embodiment of the present invention, and a redundant description of features of the pattern forming apparatus of the present invention will be omitted with reference to FIG. 2. Shall be.

2 to 6, in step 600, the control system 310 connected to the pattern design system 300 in which data about a pattern to be formed in the prism sheet or the light guide plate is stored is stored in the data stored in the pattern design system 300. On the basis of this, the position signal corresponding to the coordinate value of each pattern to be formed on the prism sheet or the light guide plate is transmitted to the header portion 332.

In operation 601, the header unit 332 receiving the position signal from the control system 310 receives the laser beam output from the laser system 320, synchronized with the movement of the header unit 332, to the prism sheet or the light guide plate 340. Reflects and condenses. Here, the header portion 332 is coupled to the central direction fixed shaft 331 is configured to mechanically move along the central direction fixed shaft 331 according to the position signal received from the control system 310.

Subsequently, in step 602, the laser beam reflected by the header part 332 is fixed to the upper surface of the stage 350 which rotates at a high speed, and then on the processing surface of the prism sheet or light guide plate 340 which rotates integrally with the stage 350. The light is collected to form a pattern 341.

The best embodiments have been disclosed in the drawings and specification above. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not used to limit the scope of the present invention as defined in the meaning or claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 is a cross-sectional view schematically showing a conventional surface light source device.

2 is an exploded perspective view showing a surface light source device to which a prism sheet or a light guide plate according to an embodiment of the present invention is applied.

3 is a block diagram of a pattern forming apparatus for forming a pattern on a prism sheet or a light guide plate according to an embodiment of the present invention.

4 illustrates a case in which the shape of the pattern is a solid line according to an embodiment of the present invention.

5 illustrates a case where the shape of the pattern is a dotted line according to an embodiment of the present invention.

6 is a flowchart of a method of forming a pattern on a prism sheet or light guide plate according to one embodiment of the present invention.

Claims (10)

(a) a control system connected to a pattern design system in which data about a pattern to be formed on the prism sheet or the light guide plate is stored, the coordinate value of each pattern to be formed on the prism sheet or the light guide plate based on the data stored in the pattern design system; Transmitting a position signal to a header unit; (b) in the header portion coupled to the central fixed shaft and mechanically moving along the central fixed shaft in accordance with the position signal received from the control system, the laser beam output from the laser system, synchronized with the movement of the header portion. Reflecting the prism sheet or light guide plate; And (c) forming a pattern by the reflected laser beam on the processing surface of the prism sheet or light guide plate which is fixed to the upper surface of the stage rotating at a high speed and integrally rotates with the stage; With the high speed rotation of the stage and the movement of the header portion moving along the central fixed axis, the laser beam reflected from the header portion is focused on the processing surface of the prism sheet or light guide plate to form a pattern having a spiral groove. Pattern manufacturing method characterized in that. The method of claim 1, The optical unit included in the header unit for reflecting the laser beam, has a structure of the type that can adjust the angle of incidence of the laser beam output from the laser system. The method of claim 1, The spiral groove is a pattern manufacturing method, characterized in that the solid line. The method of claim 1, The spiral groove is a pattern manufacturing method, characterized in that the solid line. The method of claim 1, The pattern is a pattern manufacturing method, characterized in that the groove length is gradually formed longer away from the light source. The method of claim 1, The pattern is a pattern manufacturing method, characterized in that the pitch between the grooves is gradually narrowed away from the light source. The method of claim 1, The pattern is a pattern manufacturing method, characterized in that the groove length is gradually longer as the distance from the light source, the pitch between the grooves is gradually narrower. The method of claim 1, The pattern is a pattern manufacturing method, characterized in that the width between the grooves is gradually narrowed away from the light source. The method of claim 1, The pattern is a pattern manufacturing method characterized in that the longer the distance from the light source, the longer the groove is formed, the pitch between the grooves are formed narrower, or the width between the grooves is narrower. The method of claim 1, The intensity of the laser beam output from the laser system is adjustable according to the position on the processing surface of the prism sheet or light guide plate.
KR1020080128953A 2008-12-09 2008-12-18 Method of manufacturing pattern of prism sheet and light guide panel KR20100066251A (en)

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KR20080124399 2008-12-09

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

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