TWI458623B - Manufacturing method of roller used for manufacturing patterned retardation film - Google Patents

Description

Method for manufacturing roller for producing retardation film

The present invention relates to a method of manufacturing a roller, and more particularly to a method of manufacturing a roller for manufacturing a retardation film.

With the advancement of display technology, a phase difference film has been developed. The phase difference film can produce optically different phase delays, which in turn produces a stereoscopic effect. The phase difference film can be applied to display products such as stereoscopic display glasses and stereoscopic display televisions.

The retardation film must be maintained to a certain degree of accuracy to ensure its optical quality. However, the manufacturing speed of the retardation film cannot be effectively improved under the requirement of accuracy. Therefore, researchers are currently working on developing a tool and method to quickly and accurately produce retardation films to meet the needs of the industry.

The present invention relates to a method of manufacturing a roller for manufacturing a retardation film, which engraves a roller using an engraving tool so that the surface of the roller exhibits various special textures. The roller with special grain can in turn quickly and accurately produce a retardation film by imprinting.

According to an aspect of the invention, a method of manufacturing a roller for manufacturing a retardation film is proposed. The manufacturing method of the roller for manufacturing a retardation film includes the following steps. Provide a scroll wheel. The roller has a rotating shaft and a roller surface. The roller surface has a first end and a second end opposite the first end. Provide a carving tool. The engraving tool has an engraved end, and the engraved end has a plurality of microstructures arranged in parallel. The rotating shaft is used as an axis to roll the roller in a rotating direction at a rotational speed, and the engraving tool engraves a first distance toward the second end at a first depth. The engraving tool engraves a plurality of first engravings in a first distance, exits the surface of the roller and moves to the second end to form a first engraving area. Taking the rotating shaft as the axis, the roller is rolled in the rotating direction at the rotating speed, and the engraving tool engraves a second distance toward the first end at a second depth, and the engraving tool engraves a plurality of second engravings in the second distance and leaves The roller surface is moved to the first end to form a second engraved area.

According to another aspect of the present invention, a method of manufacturing a roller for manufacturing a retardation film is proposed. The manufacturing method of the roller for manufacturing a retardation film includes the following steps. A roller is provided. The roller has a rotating shaft and a roller surface. The roller surface has a first end and a second end opposite to the first end. Provide a carving tool. The engraving tool has an engraved end, and the engraved end has a plurality of microstructures arranged in parallel. The roller is pivoted at a rotational speed in a first direction of rotation with the axis of rotation as the axis. At the same time, the engraving tool engraves a first distance toward the second end at a first depth. The engraving tool engraves a plurality of first engravings in a first distance and leaves the surface of the roller to form a first engraving area. Rotating the roller at a rotational speed in a second rotational direction opposite to the first rotational direction with the rotational axis as an axis, and while the engraving tool moves a first distance away from the surface of the roller, approaching the surface of the roller at a second depth toward the axis The second end engraves a second distance. The engraving tool engraves a plurality of second engravings in the second distance and then leaves the roller surface and moves to the second end to form a second engraving area.

In order to make the above description of the present invention more comprehensible, various preferred embodiments are described below, and in conjunction with the drawings, the detailed description is as follows:

The following is a detailed description of the embodiment, which uses an engraving tool to engrave the roller so that the surface of the roller presents various special lines. The roller with special grain can in turn quickly and accurately produce a retardation film by imprinting. However, the examples are for illustrative purposes only and are not intended to limit the scope of the invention. Further, the drawings in the embodiments are omitted to partially illustrate the technical features of the present invention.

First embodiment

Referring to FIG. 1 and FIGS. 2A-2E, FIG. 1 is a flow chart showing a method of manufacturing the roller 100 for manufacturing the retardation film 700 (shown in FIG. 3) according to the first embodiment, and FIG. 2A 2E is a schematic view showing the steps of the first figure. First, in step S110, as shown in FIG. 2A, a roller 100 is provided. The roller 100 has a rotating shaft 100c and a roller surface 100a. The roller surface 100a has a first end E11 and a first end E11. Second end E12. Before the engraving has been performed, the roller surface 100a is a smooth cylindrical surface, that is, each diameter 100d along the rotation axis 100c is the same, and the vertical distance from any point of the roller surface 100a to the rotation axis 100c is substantially equal. In the present embodiment, the material of the roller 100 is, for example, copper (Cu).

Next, in step S120, as shown in FIG. 2B, an engraving tool 900 is provided, the engraving tool 900 having an engraving end 910. The engraved end 910 has a plurality of microstructures 911 arranged in parallel. The engraving tool 900 has a hardness greater than that of the roller 100 and is made of, for example, a diamond. The width W911 of the microstructure 911 is substantially the same as the pitch D911.

Then, in step S130, as shown in FIG. 2C, the roller 100 is rotated at a rotational speed toward a rotational direction C11 with the rotational axis 100c as an axis, and the engraving tool 900 is at a first depth D11 (indicated in FIG. 2E, The broken line in FIG. 2E indicates that the roller surface 100a before engraving is engraved with a first distance L11 toward the second end E12 of the roller 100. The engraving tool 900 engraves a plurality of first engravings 111 in the first distance L11 and then leaves the roller surface 100a and moves to the second end E12 to form a first engraving area 110 on the roller surface 100a.

In step S130, the first depth D11 is between 5 micrometers and 10 micrometers, the rotational speed is between 1 rpm and 300 rpm, and the engraving tool 900 is moving between 10 mm/min and 20000 mm/ Between min. The actuation of the engraving tool 900 can be controlled by a Fast-tool-servo system.

Referring to FIG. 2D, step S130 is repeatedly performed to form a plurality of first engraving regions 110 on the roller surface 100a. The combination of the first engraved regions 110 forms a ring structure.

Next, in step S140, as shown in FIG. 2D, the roller 100 is rotated at the aforementioned rotational speed toward the rotational direction C11 with the rotational axis 100c as an axis, and the engraving tool 900 is at a second depth D12 (indicated in FIG. 2E, wherein The dashed line in FIG. 2E indicates that the roller surface 100a before engraving is engraved with a second distance L12 toward the first end E11 of the roller 100. The engraving tool 900 engraves a plurality of second engravings 121 in the second distance L12 and then leaves the roller. The surface 100a is moved to the first end E11 to form a second engraving area 120.

In step S140, the second depth D12 is between 0.1 micrometers and 10 micrometers, the rotational speed is between 1 rpm and 300 rpm, and the engraving tool 900 is moved from 10 mm/min to 20000 mm/ Between min. The actuation of the engraving tool 900 can be controlled by a Fast-tool-servo system.

Referring to FIG. 2E, step S140 is repeatedly performed to form a plurality of second engraving regions 120 on the roller surface 100a. The combination of these second engraving zones 120 forms a plurality of annular structures. In addition, the first depth D11 of the embodiment is smaller than the second depth D12, and the difference between the first depth D11 and the second depth D12 is less than 2 micrometers. Therefore, the height of the first scribe 111 is greater than the height of the second scribe 121. In other embodiments, the first depth D11 and the second depth D12 may also be equal; or the first depth D11 may be greater than the second depth D12.

The step S130 and the step S140 are repeated to form the first engraving area 110 and the second engraving area 120 on the roller surface 100a, so that the roller surface 100a fills the first engraving area 110 and the second engraving area 120. The combination of the first engraving area 110 and the second engraving areas 120 is a grid-like strip structure and the first engraving areas 110 and the second engraving areas 120 are parallel to each other.

Referring to FIG. 3, an exploded perspective view of the retardation film 700 manufactured by the roller 100 of the first embodiment is shown. The roller 100 is used to imprint a phase difference pattern 710 on a substrate 701 containing an embossable resin layer. The first film line 711 transferred by the first pattern 111 is located at a lower position, and the second pattern 121 is rotated. The printed second film line 721 has a higher position, and after the polymerizable liquid crystal layer 720 is coated on the phase difference pattern 710, the phase difference film 700 having a phase difference effect can be formed.

Second embodiment

Referring to FIG. 4 and FIGS. 5A-5E, FIG. 4 is a flow chart showing a method of manufacturing the roller 200 for manufacturing the retardation film 700 (shown in FIG. 3) according to the second embodiment, and FIG. 5A~ Figure 5E shows a schematic diagram of the steps of Figure 4. The manufacturing method of the roller 200 for manufacturing the retardation film 700 of the present embodiment is different from the manufacturing method of the roller 100 for manufacturing the retardation film 700 of the first embodiment in steps S230 and S240 of engraving, and the rest are the same. The description will not be repeated.

After steps S110 to S120, the process proceeds to step S230. As shown in FIG. 5C, the roller 200 is pivoted at a rotational speed toward a first rotational direction C21 with the rotational axis 200c as an axis, and the engraving tool 900 is at a first depth D21 (shown in FIG. 5E, wherein FIG. 5E The dashed line indicates that the roller surface 200a before engraving is engraved with a first distance L21 toward the second end of the roller 200. The engraving tool 900 engraves a plurality of first engravings 211 in the first distance L21 and leaves the roller surface 200a. A first engraving area 210.

Next, in step S240, the roller 200 is rotated with the rotation axis 200c as a rotation direction of the step S130 toward a second rotation direction C22 opposite to the first rotation direction C21, while the engraving tool 900 is at a second depth. D12 engraves a second distance L22 toward the second end E22. The engraving tool 900 engraves a plurality of second engravings 221 in the second distance L22 and then leaves the roller surface 200a and moves to the second end E22 to form a second engraving area. 220.

As shown in FIGS. 2C and 2D, in steps S130 and S140 of the first embodiment, the roller 100 adopts the same rotational direction C11, but the engraving tool 900 adopts different moving directions. As shown in FIGS. 5C and 5D, in steps S230 and S240 of the second embodiment, the roller 200 adopts different first rotation directions C21 and second rotation directions C22, but the engraving tool 900 adopts the same movement direction. As shown in Figures 2E and 5E, the above two embodiments can all lead to the same result.

The manufacturing method of the roller for manufacturing a phase difference film disclosed in the above embodiment of the present invention engraves the roller by using an engraving tool so that the surface of the roller presents various special lines. The roller with special grain can in turn quickly and accurately produce a retardation film by imprinting.

In the above, the present invention has been disclosed in the above preferred embodiments, and is not intended to limit the invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

100, 200. . . Wheel

100a, 200a. . . Roller surface

100c, 200c. . . Rotating shaft

110, 210. . . First engraving area

111, 211. . . First engraving

120, 220. . . Second engraving area

121, 221. . . Second engraving

700. . . Phase difference film

701. . . Substrate

710. . . Phase difference pattern

711. . . First film texture

721. . . Second film texture

900. . . Sculpting tool

911. . . microstructure

C11. . . turn around

C21. . . First direction of rotation

C22. . . Second direction of rotation

D11, D21. . . First depth

D12, D22. . . Second depth

D911. . . spacing

E11, E21. . . First end

E12, E22. . . Second end

L11, L21. . . First distance

L12, L22‧‧‧ second distance

S110~S140, S230~S240‧‧‧ Process steps

W911‧‧‧Width

Fig. 1 is a flow chart showing a method of manufacturing a roller for manufacturing a retardation film of the first embodiment.

2A-2E are schematic views showing the steps of the first figure.

Fig. 3 is a schematic exploded view showing the phase difference film manufactured by the roller of the first embodiment.

Fig. 4 is a flow chart showing the manufacturing method of the roller for manufacturing a retardation film of the second embodiment.

5A-5E are schematic views showing the steps of FIG. 4.

S110～S140. . . Process step

Claims (11)

A manufacturing method of a roller for manufacturing a retardation film, comprising: providing a roller, the roller having a rotating shaft and a roller surface, the roller surface having a first end and a second end opposite to the first end Providing an engraving tool having an engraved end having a plurality of microstructures arranged in parallel; the axis of the rotation is used to roll the roller in a rotational direction at a rotational speed, and the engraving tool is The first depth engraves a first distance toward the second end, and the engraving tool engraves the plurality of first engravings in the first distance, then leaves the roller surface and moves to the second end to form a first engraving And rotating the roller at the rotation speed toward the rotation direction, and the engraving tool engraves a second distance toward the first end at a second depth, the engraving tool is within the second distance Engraving a plurality of second engravings, leaving the surface of the roller and moving to the first end to form a second engraving area; and repeating forming the first engraving area on the surface of the roller and a second engraving area, the surface of the roller is covered with the first engraving area and the second engraving area, wherein the combination of the first engraving area and the second engraving area is a grid-like strip structure The first engraving areas and the second engraving areas are parallel to each other in parallel. A manufacturing method of a roller for manufacturing a retardation film, comprising: providing a roller, the roller having a rotating shaft and a roller surface, the roller surface having a first end and a second end opposite to the first end ; Providing an engraving tool having an engraved end having a plurality of microstructures arranged in parallel; the shaft is pivoted at a rotational speed toward a first rotational direction, and the engraving tool is a first depth engraving a first distance toward the second end, the engraving tool engraving a plurality of first engravings in the first distance and leaving the roller surface to form a first engraving area; The shaft pivots the roller at a rotation speed toward a second rotation direction opposite to the first rotation direction, and the engraving tool approaches the roller surface to a second depth after moving the first distance away from the roller surface Engraving a second distance toward the second end, the engraving tool engraving the plurality of second engravings in the second distance, leaving the roller surface and moving to the second end to form a second engraving area; Repeatingly forming the first engraving area and the second engraving area on the surface of the roller, so that the surface of the roller is covered with the first engraving area and the second engraving area, wherein the first engraving Compositions based engraved area and the plurality of second zone is a strip-shaped grid-like structure and the plurality of first engraved area parallel to each other with the plurality of interleaved second engraved area. The method for manufacturing a roller for manufacturing a retardation film according to the first or second aspect of the invention, wherein the first depth is the same as the second depth. The method for manufacturing a roller for manufacturing a retardation film according to the first or second aspect of the invention, wherein the first depth is different from the second depth. The method for manufacturing a roller for producing a retardation film according to the above-mentioned claim 1, wherein the first depth and the second depth are between 0.1 μm and 10 μm. The manufacturing method of the roller for manufacturing a retardation film according to the above-mentioned claim 1, wherein the first embossing and the second embossing are substantially at an angle of 90±16 degrees. The manufacturing method of the roller for manufacturing a retardation film according to the first or second aspect of the invention, wherein the width of the first engraving zone and the second engraving zone is between 100 micrometers and 1000 micrometers. . The method for producing a roller for producing a retardation film according to the first or second aspect of the invention, wherein the rotational speed is between 1 rpm and 300 rpm. The manufacturing method of the roller for manufacturing a retardation film according to the first or second aspect of the invention, wherein the moving speed of the engraving tool is between 10 mm/min and 20,000 mm/min. The method for manufacturing a roller for manufacturing a retardation film according to the first or second aspect of the invention, wherein the operation of the engraving tool is Controlled by the Fast-tool-servo system. The method for manufacturing a roller for manufacturing a retardation film according to the first or second aspect of the invention, wherein the material of the roller is copper, and the material of the engraving tool is diamond.