JP2012215601A - Method for manufacturing display tool and the display tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a display tool, capable of obtaining a display part having a thickness and a good appearance; and the display tool.SOLUTION: A method for manufacturing a display tool including a display part having a three-dimensional shape on a substrate surface, includes the steps of: forming on the substrate surface a masking layer in a region except a forming surface having the display part to be formed thereon; contacting the forming surface with a liquid ultraviolet curable resin or a liquid thermosetting resin by using a mold to be overlapped with the substrate; curing the liquid ultraviolet curable resin or the liquid thermosetting resin; removing the substrate from the mold; and peeling the masking layer from the substrate surface.

Description

  The present invention relates to a method for manufacturing a display device and the display device, and more particularly to a method for manufacturing a display device including a three-dimensional display portion protruding from a substrate and the display device.

  As a display tool, a display method using tactile characters (convex characters) protruding from the surface of a substrate is known. Tactile characters are projected from the substrate surface in the form of characters and symbols. Thereby, a display tool functions as a display member which shows a tactile character visually to a user. The display tool functions as a tactile display member by touching the tactile character with a fingertip to the user.

  As a method of forming tactile characters, a method of printing a resin on a substrate surface by silk printing is known. In this method, the thickness of the tactile character is given to the substrate surface by printing the resin a plurality of times on the substrate surface. For the purpose of increasing the thickness of tactile characters, a relatively high viscosity resin is used for silk printing. For example, when an ultraviolet curable resin is used, a resin having a viscosity of 1000 dPa · s to 3000 dPa · s (printing atmosphere 20 ° C.) is used to prevent the shape of the tactile character from being lost during printing. More preferably, a resin having a viscosity of 2000 dPa · s to 2500 dPa · s (printing atmosphere 19 ° C.) is used.

  Further, there is known a method of forming braille which is a tactile character by filling the mold with an ultraviolet curable resin and then superimposing the substrate surface on the mold (see, for example, Patent Document 1).

JP 2003-208092 A

  However, when the thickness of the tactile character is increased by silk printing, it is difficult to maintain the three-dimensional shape of the printed tactile character until the resin is cured as the thickness is increased. For this reason, silk printing cannot provide a sufficient thickness for tactile characters.

  Further, as in the method described in Patent Document 1, after filling a mold with an ultraviolet curable resin and then forming a tactile character by superimposing the substrate surface on the mold, the mold and the substrate are overlaid when the mold and the substrate are superimposed. There was a risk that the ultraviolet curable resin adhered to the substrate surface and cured. Therefore, if the amount of UV curable resin to be filled is reduced to prevent the UV curable resin from overflowing from the mold, air remains in the cured UV curable resin, voids are generated in the tactile characters, and If the cured resin does not reach every corner of the mold, there is a possibility that voids are generated on the surface of the tactile character. In any case, the appearance of the display unit may be poor.

  In view of such circumstances, it is an object of the present invention to provide a method for manufacturing a display device capable of obtaining a display portion that is thick and has a good appearance, and the display device.

  A method for producing a display device according to the present invention is a method for producing a display device having a three-dimensional display unit on a substrate surface, and a masking layer is formed in a region of the substrate surface excluding a formation surface that forms the display unit. The liquid UV curable resin is formed by superposing the mold and the substrate after filling the liquid UV curable resin or liquid thermosetting resin to be the display portion into the mold overlapped with the step of forming and the substrate. Alternatively, the step of bringing the liquid thermosetting resin into contact with the forming surface, or after the mold and the substrate are overlaid, the liquid UV curable resin or the liquid thermosetting resin is filled in the mold, so that the liquid Bringing the UV curable resin or liquid thermosetting resin into contact with the forming surface; curing the liquid UV curable resin or liquid thermosetting resin; removing the substrate from the mold; The Sukingu layer and a step of peeling from the substrate surface.

  According to such a configuration, since the display unit is formed by filling the mold with a liquid ultraviolet curable resin or a liquid thermosetting resin, a thick display unit can be formed. In addition, since the masking layer is formed in the area of the substrate surface excluding the forming surface, the masking layer is peeled off from the substrate surface after curing the liquid ultraviolet curable resin or the liquid thermosetting resin. An ultraviolet curable resin or a thermosetting resin cured in a region other than the surface can be easily removed.

  In the display device manufacturing method according to the present invention, the step of forming the masking layer may include a step of forming an anchor layer on the formation surface.

  According to such a configuration, the adhesion of the ultraviolet curable resin or the thermosetting resin to the formation surface can be further strengthened.

  Further, in the method for manufacturing a display device according to the present invention, the step of bringing the liquid ultraviolet curable resin or the liquid thermosetting resin into contact with the formation surface includes the liquid thermosetting resin or liquid surplus in forming the display portion. The step of bringing the thermosetting resin into contact with the masking layer may be included.

  According to such a configuration, it is possible to fill the mold with a liquid ultraviolet curable resin or a liquid thermosetting resin in an amount more than the amount necessary for forming the display unit. Thereby, at the time of filling, air can be prevented from being mixed into the liquid ultraviolet curable resin or the liquid thermosetting resin, and the inside of the cured ultraviolet curable resin or the cured thermosetting resin and The generation of voids on the surface can be prevented. In addition, excess liquid UV curable resin or excess liquid thermosetting resin contacts the masking layer, preventing excess liquid UV curable resin or excess liquid thermosetting resin from curing on the substrate surface. it can. By these, the external appearance of a display part can be made favorable.

  In addition, the method for manufacturing a display device according to the present invention may further include a step of removing burrs remaining on the display portion after the masking layer is peeled from the substrate surface.

  According to such a configuration, the appearance of the display unit can be improved.

  In the display device manufacturing method according to the present invention, the liquid ultraviolet curable resin may have a viscosity of 0.5 dPa · s to 30 dPa · s.

  According to such a configuration, by using a liquid UV curable resin having a lower viscosity, it is possible to prevent air from being mixed into the liquid UV curable resin even if the display unit has a complicated shape. . Thereby, generation | occurrence | production of the void in the hardened | cured ultraviolet curable resin can be suppressed more.

  In the method for manufacturing a display device according to the present invention, the step of curing the liquid ultraviolet curable resin may be performed by irradiating the liquid ultraviolet curable resin with ultraviolet rays from the substrate side formed of a transparent material. .

  With such a configuration, even when the mold is formed of an opaque material, the liquid ultraviolet curable resin can be irradiated with ultraviolet rays through the substrate, so that the liquid ultraviolet curable resin can be cured. .

  Moreover, the method for manufacturing a display device according to the present invention may further include a step of irradiating the ultraviolet curable resin with ultraviolet rays again after removing the substrate from the mold.

  According to such a configuration, the ultraviolet curable resin can be cured more reliably and the touch of the display device can be made softer.

  In the method for manufacturing a display device according to the present invention, the step of curing the liquid ultraviolet curable resin may irradiate at least a mold formed of a transparent material with ultraviolet rays.

  According to such a configuration, since the mold formed of a transparent material is irradiated with ultraviolet rays, the liquid ultraviolet curable resin can be cured even if the substrate is formed of a material that does not transmit ultraviolet rays. Further, in the case where the substrate is formed of a material that transmits ultraviolet rays, ultraviolet rays can be irradiated from any direction of the mold on which the substrates are superimposed, so that a thicker display member can be formed.

  Further, the display device according to the present invention is a display device including a three-dimensional display unit on a substrate surface, and the display unit is made of a cured ultraviolet curable resin or a cured thermosetting resin, The surface roughness of the surface is higher than the surface roughness of the exposed surface of the substrate surface.

  According to such a configuration, since the surface roughness of the surface of the display unit is higher than the surface roughness of the exposed surface of the substrate surface, it is possible to improve the tactile sensation when the display unit is touched with a fingertip.

  As described above, according to the display device manufacturing method and the display device according to the present invention, a display device having a thickness and a good appearance can be obtained in a display device including a three-dimensional display device on a substrate surface. There is an excellent effect.

FIG. 1A shows a display tool according to an embodiment of the present invention, FIG. 1A is a plan view of the display tool, FIG. 1B is a cross-sectional view taken along line AA of FIG. 1A, and FIG. These show the B arrow view of Fig.1 (a). The type | mold which concerns on the same embodiment is shown, Fig.2 (a) shows the top view of a type | mold, FIG.2 (b) shows CC sectional drawing of Fig.2 (a). The top view of the board | substrate which concerns on the same embodiment is shown. The board | substrate with which the masking layer based on the embodiment was formed is shown, Fig.4 (a) shows the top view of a board | substrate, FIG.4 (b) shows the D arrow line view of Fig.4 (a). FIG. 5A is a plan view of the substrate, and FIG. 5B is a cross-sectional view taken along line EE of FIG. 5A. 6A is a cross-sectional view taken along the line CC in FIG. 2A in which the mold according to the embodiment is filled with an ultraviolet curable resin or a thermosetting resin, and FIG. 6B is the same embodiment. FIG. 2C is a cross-sectional view taken along the line CC of FIG. 2A in which the substrate is superimposed on the mold according to FIG. The schematic which irradiates an ultraviolet-ray to the board | substrate and type | mold which concern on the embodiment is shown. The board | substrate removed from the type | mold which concerns on the embodiment is shown, FIG.8 (a) is a top view of a board | substrate, FIG.8 (b) is FF sectional drawing of Fig.8 (a), FIG.8 (c). FIG. 8A shows a view in the direction of arrow G in FIG. FIG. 9A is a plan view of the substrate, FIG. 9B is a cross-sectional view taken along the line H-H in FIG. 9A, and FIG. Fig. 9 shows a view in the direction of arrow I in Fig. 9 (a). Sectional drawing of the type | mold which concerns on other embodiment is shown. Sectional drawing of the display tool which concerns on other embodiment is shown.

  Hereinafter, a method for manufacturing a display device according to the present invention and a first embodiment of the display device will be described with reference to FIGS.

[Indicator]
As shown in FIG. 1 (a) to FIG. 1 (c), the display tool 1 includes a substrate 2 on which tactile characters are formed, a display unit 3 that is tactile characters, and adhesion of the display unit 3 to the substrate 2. And an anchor layer 4 for strengthening. That is, the display tool 1 is obtained by laminating the anchor layer 4 and the display unit 3 on the substrate 2 in that order. The display tool 1 is used as, for example, a convex button, a membrane switch, a logo, or a nameplate. In the present embodiment, the case where the display tool 1 functions as a display member indicating the number “2” will be described.

  The substrate 2 is formed in a plate shape with a transparent member. The substrate 2 is, for example, acrylic formed in a plate shape. The substrate 2 has a substrate surface 2a on which the display unit 3 is formed on at least one surface. The substrate surface 2a is formed in a glossy and low surface roughness state by performing a surface polishing process.

  The display unit 3 is a three-dimensional tactile character formed of resin. The display unit 3 is formed on the substrate surface 2a of the substrate 2 and protrudes from the substrate surface 2a with a predetermined thickness. The display unit 3 is formed, for example, by curing an ultraviolet curable resin, and protrudes from the substrate surface 2a with a thickness of about 1 mm. Since the display unit 3 is formed by curing the ultraviolet curable resin, the display unit 3 is formed with a higher surface roughness. That is, the display unit 3 is formed in a state in which the surface roughness is higher than the substrate surface 2a (the surface of the surface unit 3 is rougher than the substrate surface 2a). The display unit 3 projects from the substrate surface 2a in the form of the number “2”, thereby causing the display 1 to function as a display member indicating the number “2”.

  The anchor layer 4 is, for example, a vinyl resin or an epoxy resin, and is provided in a thin film shape between the substrate surface 2 a and the display unit 3 for the purpose of improving the adhesion between the substrate 2 and the display unit 3. The anchor layer 4 prevents the display unit 3 from falling off the substrate surface 2a by enhancing the adhesion between the substrate surface 2a and the display unit 3.

[Method for producing display 1]
Next, a manufacturing method of the display tool 1 will be described. Prior to explaining the manufacturing method of the display tool 1, the structure of the mold 7 for forming the display unit 3 on the display tool 1 will be described.

  As shown in FIGS. 2A and 2B, the mold 7 includes a bottom 8 that forms the bottom of the mold 7 that is formed in a concave shape, and an overlapping direction shown in FIG. Encloses the protruding portion 9, the concave filling portion 10 formed by the protruding portion 9 and the bottom portion 8, the concave resin receiving portion 11 provided adjacent to the periphery of the protruding portion 9, and the resin receiving portion 11. Thus, the board | substrate support part 12 provided protruding from the bottom part 8 and the formwork 13 provided protruding from the bottom part 8 so that the board | substrate support part 12 may be enclosed are provided. The mold 7 may be formed of any material as long as it has a high releasability from the resin 3a. In the present embodiment, the case where the mold 7 is formed of opaque PTFE (polytetrafluoroethylene resin) will be described.

  The bottom 8 is provided as the bottom of the mold 7 formed in a concave shape, and also functions as the bottom of the concave filling portion 10 and the resin receiving portion 11. The bottom 8 functions as a base of the mold 7 by being provided with a length that extends to the mold 13 in a direction perpendicular to the overlapping direction.

  The protruding portion 9 is provided to protrude from the bottom portion 8 in the overlapping direction at a position that borders the shape of the display portion 3. The protrusion 9 forms a concave shape with the bottom 8 as the bottom. The protruding portion 9 protrudes from the bottom portion 8 at the same height as the substrate support portion 12. The protruding portion 9 supports the substrate 2 with respect to the bottom portion 8 by being overlapped with the masking layer 5 of the substrate 2 overlapped with the mold 7. In the present embodiment, in order to form the display portion 3 in the shape of the number “2” on the display 1, the protrusion 9 is a number “2” that is reversed left and right when viewed from the direction in which the substrate 2 is superimposed on the mold 7. It is formed in the position which borders the edge of.

  The filling portion 10 is provided inside the concave shape with the bottom portion 8 as a bottom and the protruding portion 9 as a side wall. The filling portion 10 has a concave shape and is filled with a liquid ultraviolet curable resin 3 a that is a material of the display portion 3.

  The resin receiving portion 11 is provided adjacent to the protruding portion 9 on the bottom portion 8. The resin receiving portion 11 is provided inside the concave shape with the bottom portion 8 as a bottom and the protruding portion 9 and the substrate support portion 12 as side walls. The resin receiving portion 11 has a function of receiving the liquid ultraviolet curable resin 3 a flowing from the filling portion 10 beyond the protruding portion 9.

  The substrate support portion 12 is provided at a position surrounding the resin receiving portion 11. The substrate support part 12 protrudes from the bottom part 8 at the same height as the protrusion part 9. The substrate support unit 12 supports the substrate 2 by being superimposed on the masking layer 5 of the substrate 2 that is superimposed on the mold 7.

  The mold 13 is provided at a position surrounding the substrate support 12. The mold 13 protrudes in the overlapping direction from the bottom 8 rather than the substrate support 12. The mold frame 13 is preferably a side wall provided at a position adjacent to the substrate support portion 12, and the position of the superimposed substrate 2 with respect to the mold 7 is preferably fixed. That is, it is preferable that the mold frame 13 has a side wall adjacent to the substrate support portion 12 in accordance with the shape of the substrate surface 2a of the substrate 2 so that the position of the superimposed substrate 2 with respect to the mold 7 is fixed.

  A method for manufacturing the display tool 1 using such a mold 7 will be described. In the method of manufacturing the display device 1 according to the present embodiment, the step of forming the masking layer 5 on the substrate 2, filling the mold 7 with the liquid ultraviolet curable resin 3 a to be the display unit 3, Are stacked, the step of bringing the liquid ultraviolet curable resin 3a into contact with the forming surface 6, the step of curing the liquid ultraviolet curable resins 3b and 3c by irradiating ultraviolet rays, and the substrate 7 from the mold 7. After removing the substrate 2 from the mold 7, the step of irradiating the ultraviolet curable resins 3b and 3c with ultraviolet rays, the step of peeling the masking layer 5 from the substrate surface 2a, and the display unit 3 are left. Removing the burrs that are present.

  First, the step of forming the masking layer 5 on the substrate 2 is executed. The step of forming the masking layer 5 on the substrate 2 includes the step of preparing the substrate 2 as shown in FIG. 3 and the masking layer 5 in the region of the substrate surface 2a excluding the formation surface 6 on which the display unit 3 is formed. Forming.

  In the step of preparing the substrate 2, the substrate 2 formed in a plate shape is prepared. Since the details of the substrate 2 are the same as those of the substrate 2 in the description of the display device 1, the description thereof is omitted here.

  Next, the step of forming the masking layer 5 in the region of the substrate surface 2a excluding the formation surface 6 on which the display unit 3 is formed is executed. As shown in FIGS. 4A and 4B, the masking layer 5 is printed on the substrate surface 2a, leaving the formation surface 6. The masking layer 5 is formed by silk-printing a masking material on the substrate surface 2a. The masking layer 5 is preferably a material that does not completely block ultraviolet rays. The masking layer 5 may be an ultraviolet curable resin, for example. The masking layer 5 is dried after printing and forms a film on the substrate surface 2a.

  In the present embodiment, the masking layer 5 is printed on the substrate surface 2 a so as to form the formation surface 6 in the shape of the number “2” for the purpose of forming the display unit 3 in the shape of the number “2”. Is done. Thereby, the masking layer 5 covers the substrate surface 2a while leaving the substrate surface 2a in the shape of the formation surface 6, that is, the number “2”, among the substrate surface 2a. The masking layer 5 is provided so as to protect the substrate surface 2a from the material forming the display unit 3 which is to adhere to the substrate 2 outside the region of the formation surface 6, that is, the region of the numeral “2”.

  The step of forming the masking layer 5 on the substrate 2 may further include the step of forming the anchor layer 4 on the formation surface 6. In the step of forming the anchor layer 4, as shown in FIGS. 5A and 5B, the anchor layer 4 is formed in the shape of the formation surface 6 in order to improve the adhesion between the display unit 3 and the substrate 2. Printed together. For example, the anchor layer 4 is silk-printed on the formation surface 6 as an anchor material in which a vinyl-based resin is dissolved in a solvent. The anchor layer 4 is dried after printing, whereby the mass and the volume of the solvent are reduced.

  In the present embodiment, the anchor layer 4 is printed at a certain interval from the boundary between the masking layer 5 and the formation surface 6. As a result, even when the display unit 3 is formed slightly deviated from the position of the formation surface 6 due to a shift in the superposition of the substrate 2 on the mold 7, the anchor layer 4 remains in the display unit 3. To prevent exposure to the substrate surface 2a. If it is guaranteed that the formation surface 6 is superimposed on the filling portion 10 without shifting, the anchor layer 4 covers the entire formation surface 6 in accordance with the boundary between the masking layer 5 and the formation surface 6. Is preferably formed. By forming the anchor layer 4 so as to cover the entire formation surface 6, the area of the display unit 3 bonded to the anchor layer 4 is increased, and as a result, the display unit 3 is further prevented from falling off the substrate surface 2 a. be able to.

  Here, the step of forming the anchor layer 4 may be performed before the step of forming the masking layer 5 in a region of the substrate surface 2a excluding the formation surface 6 on which the display unit 3 is formed. That is, the masking layer 5 may be formed after the anchor layer 4 is formed.

  Next, as shown in FIGS. 6A and 6B, after filling the mold 7 overlapped with the substrate 2 with the liquid ultraviolet curable resin 3 a to be the display unit 3, the mold 7 and the substrate 2, the step of bringing the liquid ultraviolet curable resin 3 a and the formation surface 6 into contact with each other is executed.

  After filling the mold 7 overlapped with the substrate 2 with the liquid ultraviolet curable resin 3a to be the display unit 3, the mold 7 and the substrate surface 2a are overlapped to form the liquid ultraviolet curable resin 3a and the formation surface 6. 6 (a), the mold 7 is filled with a liquid ultraviolet curable resin 3a that becomes the display unit 3 as shown in FIG. 6 (a), and the mold 7 as shown in FIG. 6 (b). A step of superposing the substrate 2 and a step of bringing the liquid ultraviolet curable resin 3c surplus in forming the display unit 3 out of the liquid ultraviolet curable resin 3a filled in the mold 7 into contact with the masking layer 5. .

  First, a step of filling the mold 7 with a liquid ultraviolet curable resin 3a that becomes the display unit 3 is executed. The liquid ultraviolet curable resin 3 a is filled in the filling portion 10 in the mold 7. The liquid ultraviolet curable resin 3a is filled to such an extent that the volume of the concave filling portion 10 is sufficiently filled. More preferably, the liquid ultraviolet curable resin 3a is superposed in the superposition direction with surface tension between the protrusions 9 and 9 serving as the side walls of the concave filling portion 10 in the superposition direction shown in FIG. It is filled to such an extent that it protrudes.

  Next, the step of overlaying the mold 7 and the substrate 2 is executed. The substrate 2 is overlaid with the substrate surface 2a facing the mold 7 in the overlapping direction shown in FIG. Further, the substrate 2 is overlapped with the mold 7 so as to enter the inside of the side wall of the mold frame 13, and its position is fixed to the mold 7.

  When the substrate 2 is overlaid on the mold 7, the masking layer 5 comes into contact with the surface of the substrate support portion 12 in the overlapping direction. Further, the boundary between the masking layer 5 and the formation surface 6 comes into contact with the surface of the protruding portion 9 in the overlapping direction. The anchor layer 4 is fixed at a position facing the filling portion 10.

  Next, the step of contacting the masking layer 5 with the liquid UV curable resin 3c surplus in the formation of the display unit 3 among the liquid UV curable resin 3a filled in the mold 7 is performed. The liquid UV curable resin 3a is filled in the filling portion 10 with a surface tension between the protrusions 9 and 9, and the volume of the region surrounded by the substrate 2 and the filling portion 10 superimposed on the mold 7 is filled. The excess liquid UV curable resin 3a becomes an excessive liquid UV curable resin 3c. The liquid ultraviolet curable resin 3 a left in the filling unit 10 becomes the liquid ultraviolet curable resin 3 b that becomes the display unit 3. As shown in FIG. 6B, the liquid ultraviolet curable resin 3 c flows into the resin receiving portion 11 beyond the protruding portion 9 when the substrate 2 is overlaid on the mold 7. The liquid ultraviolet curable resin 3 c flows into the resin receiving portion 11, thereby coming into contact with the masking layer 5 formed on the substrate surface 2 a of the substrate 2 superimposed on the mold 7. More specifically, the liquid ultraviolet curable resin 3c flows into the resin receiving portion 11 and thereby contacts the surface of the masking layer 5 that closes the resin receiving portion 11 in the overlapping direction shown in FIG.

  More appropriately, in order for excess liquid ultraviolet curable resin 3 c to flow into resin receiving portion 11, it is preferable that the viscosity of liquid ultraviolet curable resin 3 a filled in filling portion 10 is lower. Moreover, it is preferable that the viscosity of the liquid ultraviolet curable resin 3a is lower in order to fill the liquid ultraviolet curable resin 3a without introducing air into the filling portion 10. The liquid ultraviolet curable resin 3a preferably has a viscosity of, for example, 0.5 dPa · s to 30 dPa · s (filling atmosphere 20 ° C.). More preferably, the liquid ultraviolet curable resin 3a is 10 dPa · s to 15 dPa · s (filling atmosphere 19 ° C.).

  After the substrate 2 and the mold 7 are overlaid, as shown in FIG. 7, a step of curing the liquid ultraviolet curable resins 3b and 3c is performed. The light source 14 irradiates the substrate 2 and the mold 7 with ultraviolet rays from the substrate 2 side. The ultraviolet rays are irradiated to the liquid ultraviolet curable resin 3b filled in the filling portion 10 and the excess liquid ultraviolet curable resin 3c flowing into the resin receiving portion 11, so that the liquid ultraviolet curable resin 3b and the excess Each of the liquid UV curable resins 3c to be cured is cured at that position to become a cured UV curable resin 3b and a cured UV curable resin 3c.

  After the liquid ultraviolet curable resins 3b and 3c are cured, a step of removing the substrate 2 from the mold 7 is executed. The substrate 2 is removed from the mold 7 by being pulled out of the mold 7 in the removal direction shown in FIG. As shown in FIGS. 8A to 8C, a cured ultraviolet curable resin 3c that adheres to the masking layer 5 is formed on the substrate 2 removed from the mold 7, and the anchor layer 4 and the formation surface are formed. A cured ultraviolet curable resin 3 b that adheres to 6 is formed. The cured ultraviolet curable resin 3 b includes an ultraviolet curable resin 3 d cured at a thickness corresponding to the thickness of the masking layer 5, and the display unit 3 formed in the filling unit 10.

  The step of irradiating the ultraviolet curable resins 3b and 3c with ultraviolet rays is performed again on the substrate 2 removed from the mold 7. A light source (not shown) irradiates the substrate 2 with ultraviolet rays from the substrate surface 2 a side of the substrate 2. As a result, the ultraviolet curable resins 3b and 3c cured on the bottom 8 side of the mold 7 are reliably cured. Therefore, insufficient curing of the ultraviolet curable resins 3b and 3c can be prevented, and the ultraviolet curable resins 3b and 3c can be formed with a softer feel. In the step of curing the liquid ultraviolet curable resin 3b, when the liquid ultraviolet curable resin 3b, 3c can be sufficiently cured, that is, with the substrate 2 removed from the mold 7, the liquid ultraviolet curable resin 3b, If 3c is fully cured, this step may not be performed.

  Next, as shown in FIGS. 9A to 9C, a step of peeling the masking layer 5 from the substrate surface 2a is performed. The masking layer 5 is peeled off from the substrate surface 2a by being applied with a force in the direction of being peeled off from the substrate surface 2a by being bonded to an adhesive tape or the like. Since the cured ultraviolet curable resin 3c is bonded to the masking layer 5 and cured, it is removed together with the masking layer 5 from the substrate surface 2a.

  After peeling the masking layer 5 from the substrate surface 2a, a step of removing burrs remaining on the display unit 3 is performed. By removing the masking layer 5 from the substrate surface 2a, the cured ultraviolet curable resin 3b adhered to the anchor layer 4 and the formation surface 6 is left on the substrate surface 2a. The cured ultraviolet curable resin 3b is formed in a convex cross section in the overlapping direction shown in FIG. That is, the cured ultraviolet curable resin 3 b includes the display unit 3 and the cured ultraviolet curable resin 3 d that protrudes from the display unit 3 in the direction perpendicular to the overlapping direction at a distance u or v. The cured ultraviolet curable resin 3 d protrudes from the display unit 3 with the same thickness as the removed masking layer 5. Here, the cured ultraviolet curable resin 3 d is removed from the display unit 3 as a burr of the display unit 3. Thereby, the external appearance of the display part 3 can be made favorable. Note that this step may not be executed when the cured ultraviolet curable resin 3d does not exist or the protrusion of the cured ultraviolet curable resin 3d is not noticeable.

  As described above, the method for manufacturing a display device and the display device according to the present embodiment can form a thick display portion that sufficiently protrudes from the substrate surface. Before the UV curable resin is cured in a state where the substrate is put into the mold, excess UV curable resin can be allowed to flow into the resin receiving portion in advance, so that the display portion caused by the injection of the UV curable resin into the filling portion can be used. Intrusion of air can be prevented. In particular, even if the display portion is a complicated character or symbol, the filling portion can be sufficiently filled with the ultraviolet curable resin. Thereby, a display with a good appearance can be manufactured.

  In addition, the display device manufacturing method and the display device in this embodiment can manufacture a display portion in which the ultraviolet curable resin is less likely to be peeled off from the substrate surface than when the ultraviolet curable resin is printed on the substrate surface. Further, since the surface roughness of the display unit is higher than the surface roughness of the substrate surface, a soft touch feeling can be realized when the display function functions as a tactile display member.

  In addition, the display device manufacturing method and the display device in this embodiment can form a display portion even when the substrate has a curvature. In addition, a display portion having a thickness of 1.0 mm or more can be formed on the substrate surface. In addition, the display portion can be formed in Braille so as to have a more beautiful hemispherical shape than in the past.

  It should be noted that the display device manufacturing method and display device according to the present invention are not limited to the above-described embodiments, and it is needless to say that various modifications can be made without departing from the scope of the present invention. Moreover, it is needless to say that configurations, methods, and the like according to various modifications described below may be arbitrarily selected and employed in the configurations, methods, and the like according to the above-described embodiments.

  For example, in the display device manufacturing method and display device according to the present invention, the formed display unit 3 is described as the number “2”. However, the display unit 3 is not limited to the number “2”, and various characters, It may be formed in the shape of a symbol.

  Further, in the display device manufacturing method and display device according to the present invention, for example, a thermosetting resin such as urethane resin, epoxy resin, or unsaturated polyester may be used instead of the ultraviolet curable resin. By using a thermosetting resin for the display unit 3, it is not necessary to cure again after removing the substrate 2 from the mold 7. Further, it is not necessary to cure the liquid thermosetting resins 3b and 3c using the light source 14, and the manufacturing cost of the display device 1 can be reduced. Moreover, since the surface roughness of the display unit 3 is higher than the surface roughness of the substrate surface 2a as in the case of using an ultraviolet curable resin, when the display tool 1 functions as a tactile display member, a soft touch Comfort can be realized.

  In the case of using a thermosetting resin, the step of curing the liquid thermosetting resins 3b and 3c is not allowed to be performed in the state where the substrate 2 and the mold 7 are superposed in place of the ultraviolet irradiation. It is executed by applying heat. Thereby, the cross-linking reaction in the liquid thermosetting resins 3b and 3c proceeds, and the liquid thermosetting resins 3b and 3c are cured.

  By using the thermosetting resin, the display unit 3 can be formed even when the substrate 2 has a curvature, as in the case of using the ultraviolet curable resin. Further, the display unit 3 having a thickness of 1.0 mm or more can be formed on the substrate surface 2a. In addition, the display unit 3 can be formed in Braille so as to have a more beautiful hemispherical shape than in the past. Moreover, even if the board | substrate 2 is a metal plate, the display part 3 can be formed by utilizing a thermosetting resin.

  Further, in the display device manufacturing method and the display device according to the present invention, when the adhesive strength of the material forming the display unit 3 to the material of the substrate surface 2a is strong enough not to peel off when the display device 1 is used. The anchor layer 4 may not be provided. Further, the step of forming the anchor layer 4 may be omitted. Thereby, since a process can be omitted in manufacturing the display tool 1, the manufacturing cost of the display tool 1 can be reduced.

  Moreover, in the manufacturing method of the display tool which concerns on this invention, you may form the masking layer 5 in the area | region of the predetermined range surrounding the formation surface 6. FIG. For example, the masking layer 5 may be formed only from the end portion of the formation surface 6 to the end portion of the region of the substrate surface 2 a facing the resin receiving portion 11 by overlapping the mold 7 and the substrate 2. Thereby, since the area | region which forms the masking layer 5 can be narrowed, the manufacturing cost of the display tool 1 can be reduced.

  In the method for manufacturing a display device according to the present invention, the mold 7 may be formed of a transparent resin. For example, the mold 7 may be formed of PMP resin (polymethylpentene resin). Thereby, since the ultraviolet-ray can be irradiated to the liquid ultraviolet curing resin 3b from the light source 14 also from the type | mold 7 side, the thicker display part 3 can be formed. Even if the substrate 2 is formed of an opaque material, the liquid ultraviolet curable resin 3b can be cured. That is, even if the substrate 2 is a metal plate, the display unit 3 can be formed using a liquid ultraviolet curable resin.

  In the display device manufacturing method and the display device according to the present invention, the anchor layer 4 may function as a colored layer by including a coloring pigment. The anchor layer 4 functions as a colored layer, so that the display unit 3 can be colored and displayed from the substrate 2 side of the display unit 3. Moreover, when the area | region without a colored layer is transparent among the board | substrate surfaces 2a, this area | region can give the board | substrate 2 the feeling with a depth.

  In addition, when the substrate 2 is formed by overlapping and bonding two transparent resin plates, one transparent resin plate having the substrate surface 2a is colored on the back surface of the substrate surface 2a and the display unit 3 is colored. You may have the coloring part which is not shown in figure. The colored portion is formed in accordance with the position of the display portion 3 on the back surface of one transparent resin plate. The colored portion is colored ink, and is formed by printing according to the position of the display portion 3. For example, when the display unit 3 is the number “2”, the coloring unit is colored in accordance with the position of the display unit 3 by reversing the shape of the number “2” on the back surface of one transparent resin plate. It is formed by printing with fresh ink. In addition, a coloring part may be provided in the position which overlaps with the display part 3 in the surface adhere | attached with one transparent resin board by the other transparent resin board. Alternatively, the other transparent resin plate may be provided at a position overlapping the display unit 3 on the back surface of the surface bonded to the one transparent resin plate. In this case, the colored portion is not limited to ink, and a colored sheet, a diffusion sheet, or the like can be used. The other transparent resin plate may be a milky white resin plate that is colored milky white and transmits light.

  Further, the other transparent resin plate may be colored in a region other than the position overlapping the display unit 3 on the surface bonded to the one transparent resin plate. Specifically, the other transparent resin plate may be colored by printing colored ink on a region other than the position overlapping the display unit 3 on the surface bonded to the one transparent resin plate. For example, when the display unit 3 is the number “2”, the other transparent resin plate is colored ink on a region other than the position overlapping the number “2” on the surface bonded to the one transparent resin plate. It may be colored by printing. Thereby, the board | substrate 2 can make the color of the colored part, ie, the color of the display part 3, stand out with respect to the color of the ink printed on the other transparent resin.

  In this case, the colored portion may be printed on the surface of the other transparent resin plate that is bonded to one transparent resin plate, or may not be provided on the substrate 2. When the colored portion is not provided on the substrate 2, the substrate 2 has the other transparent resin on the other side at the position overlapping the display portion 3 with respect to the color of the ink printed in the region other than the position overlapping the display portion 3. The color that can be seen through the transparent resin plate, that is, the color of the display unit 3 can be made to stand out.

  Here, the substrate 2 may be formed of one transparent resin plate having a colored portion and a colored opaque resin plate instead of the other transparent resin plate. Thereby, the board | substrate 2 can make the color of a colored part, ie, the color of the display part 3, stand out with respect to the color of an opaque resin board, and can display it. In addition, the colored portion may be printed with colored ink at a position overlapping the display portion 3 on the surface bonded to one transparent resin plate of the other opaque resin plate. For example, when the display unit 3 is the number “2”, the colored portion is superimposed on the display unit 3 in the form of the number “2” on the surface of the other opaque resin plate that is bonded to one transparent resin plate. It is formed by printing with colored ink according to the position. Further, without providing the colored portion, the other opaque resin plate may be printed with colored ink in a region other than the position overlapping the display portion 3 on the surface bonded to the one transparent resin plate. As a result, the position of the other opaque resin plate at the position overlapping with the display unit 3, that is, the color of the display unit 3 can be made to stand out. When the mold 7 is formed of an opaque resin and the display unit 3 is formed of an ultraviolet curable resin, the opaque resin plate is a transparent resin after the display unit 3 is formed using the transparent resin plate as the substrate 2. You may adhere | attach with respect to a board.

  Further, in the method of manufacturing the display device according to the present invention, as shown in FIG. 10, the angles r and s formed by the first surface 9a and the second surface 9b, which are the side surfaces of the bottom portion 8 and the protruding portion 9, are set. An obtuse angle may be used. Thereby, the mold release property in the step which removes the board | substrate 2 from the type | mold 7 can be made high.

  Moreover, in the manufacturing method of the display tool which concerns on this invention, as shown in FIG. 10, it is good also considering the contact of the bottom part 8 and the 2nd surface 9b which is a side surface of the protrusion part 9 as a chamfering structure. Thereby, as shown in FIG. 11, the display part 3 is formed in the shape which has a chamfering structure. Therefore, when the display tool 1 functions as a tactile display member, a softer touch feeling can be realized.

  Further, instead of the step of bringing the liquid ultraviolet curable resin 3 a into contact with the forming surface 6, after the mold 7 and the substrate 2 are overlapped, the liquid ultraviolet curable resin 3 a or the liquid 2 is placed between the mold 7 and the substrate 2. You may perform the step which fills the thermosetting resin 3a. In this case, a predetermined through-hole is formed in the bottom portion 8 of the filling portion 10 to form an injection hole for injecting the liquid ultraviolet curable resin 3 a or the liquid thermosetting resin 3 a into the filling portion 10. Similarly, a predetermined through-hole may be separately formed in the bottom portion 8 of the filling portion 10 to form an air hole that draws air from the filling portion 10. The liquid ultraviolet curable resin 3a or the liquid thermosetting resin 3a is injected to an extent that exceeds the volume of the region surrounded by the filling portion 10 and the substrate 2, so that a part of the liquid UV curable is excessive. It flows into the resin receiving part 11 as the resin 3c or surplus liquid thermosetting resin 3c. Accordingly, it is possible to prevent air from entering the liquid ultraviolet curable resin 3a due to the injection of the liquid ultraviolet curable resin 3a or the liquid thermosetting resin 3a into the filling unit 10, and thus to the display unit 3. Generation of voids can be prevented.

DESCRIPTION OF SYMBOLS 1 ... Display tool, 2 ... Board | substrate, 2a ... Board | substrate surface, 3 ... Display part, 3a, 3b, 3c, 3d ... Ultraviolet curable resin, 4 ... Anchor layer, 5 ... Masking layer, 6 ... Forming surface, 7 ... Mold, DESCRIPTION OF SYMBOLS 8 ... Bottom part, 9 ... Projection part, 9a ... 1st surface, 9b ... 2nd surface, 10 ... Filling part, 11 ... Resin receiving part, 12 ... Substrate support part, 13 ... Formwork, 14 ... Light source

Claims (9)

A method for producing a display device including a three-dimensional display unit on a substrate surface,
Forming a masking layer in a region of the substrate surface excluding a formation surface for forming a display unit;
After filling the mold overlapped with the substrate with the liquid UV curable resin or liquid thermosetting resin that will become the display part, the mold and the substrate are overlapped, so that the liquid UV curable resin or liquid thermosetting A step of bringing the curable resin into contact with the forming surface, or after superposing the mold and the substrate, filling the mold with a liquid ultraviolet curable resin or a liquid thermosetting resin, thereby forming a liquid ultraviolet curable resin or liquid Contacting the thermosetting resin and the forming surface,
Curing a liquid UV curable resin or a liquid thermosetting resin;
Removing the substrate from the mold;
And a step of peeling the masking layer from the surface of the substrate.   The method for producing a display device according to claim 1, wherein the step of forming the masking layer includes the step of forming an anchor layer on the forming surface.   The step of bringing the liquid ultraviolet curable resin or liquid thermosetting resin into contact with the forming surface is a step of bringing the liquid thermosetting resin or liquid thermosetting resin surplus in forming the display portion into contact with the masking layer. The method for producing a display device according to claim 1, wherein   The method for manufacturing a display device according to any one of claims 1 to 3, further comprising a step of removing burrs remaining on the display portion after peeling the masking layer from the substrate surface. .   The method for producing a display device according to any one of claims 1 to 4, wherein the liquid ultraviolet curable resin has a viscosity of 0.5 dPa · s to 30 dPa · s.   6. The method for producing a display device according to claim 5, wherein the step of curing the liquid ultraviolet curable resin comprises irradiating the liquid ultraviolet curable resin with ultraviolet rays from the side of the substrate formed of a transparent material. .   The method for producing a display device according to claim 5, further comprising a step of irradiating the ultraviolet curable resin with ultraviolet rays again after removing the substrate from the mold.   8. The display device according to claim 5, wherein the step of curing the liquid ultraviolet curable resin irradiates at least ultraviolet rays onto a mold made of a transparent material. 9. Manufacturing method. A display tool comprising a three-dimensional display on the substrate surface,
The display unit is made of a cured ultraviolet curable resin or a cured thermosetting resin, and the surface roughness of the surface of the display unit is higher than the surface roughness of the exposed surface of the substrate surface.

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