JP4967071B1 - Display member and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display member which does not generate irregularities on a substrate surface by a novel and novel method regardless of a double-sided tape, and a method for manufacturing the display member.
A substrate having a light transmission region at least in part and a printed layer printed on at least a part of the light transmission region of the substrate, the surface of the substrate being irradiated from the back side of the substrate A printed layer having a display unit that uses light from a light source that is transmitted to the side as a display medium. The printed layer has a light-shielding layer that shields the substrate except for the display unit, and has a light-transmitting property. In order to eliminate a step difference from the display portion, a step absorption layer formed on the display portion is included.
[Selection] Figure 1

Description

  The present invention relates to a display member and a manufacturing method thereof.

  2. Description of the Related Art Conventionally, there are a wide variety of display devices using a light source, such as a device using a fluorescent tube as a light source, a device using a liquid crystal display such as a portable device, and a device using an LED (Light Emitting Diode). In these devices, the light emitted from the light source passes through the base material of the display member used in combination with the light source, so that display information such as letters and patterns drawn on the surface of the base material and the display that the light source itself has Information is visible. On the other hand, a light-shielding member is attached to a portion of the base material where light emitted from the light source should be shielded, or light-shielding printing is performed. For example, when preventing leakage of light from the periphery of the base material to the outside, a light-shielding frame is attached to the base material, or light-shielding printing is performed on the frame portion.

  In particular, when light-shielding printing is performed, among the surfaces of the base material, the printed surface may be directly attached to the surface of the light source. For example, when the light source is a liquid crystal display, the printed surface of the base material is attached to the display surface of the liquid crystal display using a double-sided tape (OCA) such as acrylic resin.

  Here, a step corresponding to the thickness of the ink is generated between the printed portion and the surface of the base material on the surface of the base material attached to the liquid crystal display. Usually, the step is eliminated by using the flexibility of the double-sided tape.

  However, the level difference may not be sufficiently eliminated by the double-sided tape. In this case, irregularities are generated on the surface of the base material, which causes a decrease in the design of the device itself. Moreover, when providing a touch panel between a liquid crystal display and a base material, there exists a possibility of causing the malfunction of a touch panel due to the unevenness | corrugation of the base-material surface.

  Then, the double-sided tape which suppressed generation | occurrence | production of the unevenness | corrugation to the base-material surface by improving the performance of a double-sided tape and raising a level | step difference absorptivity is known (for example, refer patent document 1).

JP 2010-77287 A

  Absorbing the step using the double-sided tape according to Patent Document 1 is effective in that it does not leave irregularities on the surface of the substrate. On the other hand, it is also effective not to generate irregularities on the surface of the base material by eliminating the step in advance before using the double-sided tape.

  In view of such circumstances, it is an object of the present invention to provide a display member that does not cause unevenness on the surface of a base material and a method for manufacturing the display member by a novel and novel method, regardless of the double-sided tape.

The display member according to the present invention is a substrate having a light transmission region in at least a part thereof, and a printed layer printed on at least a part of the light transmission region of the substrate, and is irradiated from the back side of the substrate. A printed layer having a display unit that uses light from a light source that is transmitted through the surface of the substrate as a display medium, and the printed layer has a light-shielding layer that shields the substrate except for the display unit, and has light transmittance. , have a level difference absorbing layer formed on the display unit in order to eliminate the difference in level between the display section and the light-shielding layer, the light-shielding layer includes a first light-shielding layer formed on the substrate, the first light-shielding layer is formed, characterized in that it have a second light-shielding layer to form a step between the first light-shielding layer.

Further, the method for producing a display member according to the present invention is a step of printing a printing layer on at least a part of a light transmission region of a substrate having a light transmission region in at least a part, and the irradiation is performed from the back side of the substrate. A step of printing a print layer having a display unit that uses light of a light source that is transmitted to the surface side of the substrate as a display medium, and the step of printing the print layer is a light shielding method that shields the substrate except for the display unit. forming a layer, the step of having a light transmitting property, have a forming a step absorption layer on the display unit in order to eliminate the difference in level between the display section and the light blocking layer to form a light-shielding layer, characterized by chromatic forming a first light-shielding layer on a substrate, and forming a second light-shielding layer to form a step between the first light-shielding layer on the first light-shielding layer.

  According to such a configuration, the step between the light shielding layer and the display unit is eliminated by printing the step absorption layer on the display unit. Thereby, planarization of the printing layer printed in the printing area only by printing can be achieved, and the manufacturing cost can be suppressed. In addition, in the case where the display member and the light source are attached, the occurrence of unevenness on the substrate surface can be prevented.

Further , by providing the second light shielding layer that forms a step with respect to the first light shielding layer, the first light shielding layer and the second light shielding layer are formed even when the printing position of the step absorption layer is shifted. The groove is filled with ink. Thereby, the display portion can be filled with ink, and the ink is filled up to the surface of the second light shielding layer. Therefore, the printing layer surface can be flattened. In addition, the yield can be increased in manufacturing the display member.

Further, in the display member according to the present invention, the printing layer includes a concealing layer that conceals the display unit between the base material and at least the step absorption layer while having light transmission and not being irradiated with light from the light source. Further, the step absorption layer may eliminate a step between the light shielding layer and the masking layer.

Further, in the method for manufacturing a display member according to the present invention, the step of printing the print layer includes the display unit in a state where the light from the light source is not irradiated before the step of forming the step absorption layer. A step of forming a concealing layer for concealing at least in a region corresponding to the display portion on the substrate, and the step of forming the step absorption layer may eliminate the step between the light shielding layer and the concealing layer.

  According to such a structure, it has a concealing layer that conceals the display unit in a state of being light transmissive and not irradiated with light from the light source, and can display the display unit when necessary. . Further, since the step absorption layer eliminates the step between the light shielding layer and the concealing layer, it is possible to prevent the occurrence of unevenness on the surface of the substrate.

  Further, in the method for manufacturing a display member according to the present invention, before the step of forming the step absorption layer, at least the surface of the first light shielding layer and the second light shielding layer at the position where the step absorption layer is formed is improved in wettability. You may perform the process to do.

  According to such a configuration, since the wettability of the surfaces of the first light shielding layer and the second light shielding layer at least at the position where the step absorption layer is formed is improved, when the step absorption layer is formed on the display unit, The surface tension is lower than the surface tension before the treatment, and it becomes easy to fix to the first light shielding layer and the second light shielding layer. Therefore, the surface of the step absorption layer and the surface of the second light shielding layer can be flattened. Therefore, the generation of irregularities on the surface of the substrate can be prevented.

  As described above, according to the display member and the manufacturing method thereof according to the present invention, there is an excellent effect that unevenness can be prevented from being generated on the surface of the base material by a novel and novel method regardless of the double-sided tape.

The display member which concerns on 1st Embodiment of this invention is shown, Fig.1 (a) is a front view of a display member, FIG.1 (b) is AA sectional drawing of the display member concerning Fig.1 (a). Show. The AA sectional view of the display member combined with the light source concerning the embodiment is shown. The flowchart in the manufacturing method of the display member which concerns on the embodiment is shown. The display member which concerns on 2nd Embodiment is shown, Fig.4 (a) is AA sectional drawing of a display member, FIG.4 (b) shows the front view of the printing pattern of a 2nd light shielding layer. The flowchart in the manufacturing method of the display member which concerns on the embodiment is shown. FIG. 6A is a cross-sectional view taken along the line AA in the manufacturing process of the display member according to the embodiment, FIG. 6A is a cross-sectional view taken along the line AA of the display member showing a portion that increases wettability, and FIG. AA sectional drawing of a display member when an absorption layer is printed is shown. The AA sectional view of other examples of the display member concerning a 1st embodiment is shown.

  Hereinafter, 1st Embodiment in the display member which concerns on this invention, and its manufacturing method is described with reference to FIGS.

  As shown in FIGS. 1A and 1B, the display member 1 includes a base material 10 that receives light emitted from a light source (liquid crystal display), and at least a part of a light transmission region of the base material 10. And a print layer 20 printed in the print area 11. As shown in FIG. 2, the display member 1 is attached to the light source 3 using a double-sided tape 2. The light source 3 includes a touch panel 31, a double-sided tape 32, and a liquid crystal display 33. One surface of the touch panel 31 is attached to the surface of the liquid crystal display 33 using a double-sided tape 32. Further, the back surface side of the substrate 10 is attached to the other surface of the touch panel 31 using the double-sided tape 2.

  The base material 10 is provided to receive light emitted from the light source 3 on the back surface. The base material 10 has a light transmission region capable of transmitting the received light to the surface side. Thereby, the base material 10 is comprised so that the light from the light source 3 can be visually recognized by the back surface side. The base material 10 is, for example, a plate-shaped deflecting plate having a thickness of 0.2 mm.

  The base material 10 has a printing region 11 where the printing layer 20 is printed and a non-printing region 12 which is a region other than the printing region 11 in at least a part of the light transmission region of the base material 10. The print area 11 is provided, for example, so as to demarcate a light shielding area among the light transmission areas of the substrate 10. Moreover, the printing area | region 11 is provided in the area | region which should display the display medium as shown to Fig.1 (a) on the base material 10 using the light from the light source 3, for example.

  The printing area 11 includes a light-shielding printing area 110 that performs light-shielding printing that shields light emitted from the light source 3 to the base material 10, and a transmission printing area that performs transmission printing that transmits light emitted from the light source 3. 111. In the present embodiment, the light-shielding print region 110 is provided in the frame portion of the base material 10. The transparent printing area 111 is provided at a position surrounded by the light-shielding printing area 110 in the frame portion of the substrate 10. More specifically, the transmissive printing region 111 is provided in a region that is used as a display medium using light from the light source 3 in the frame portion of the base material 10, and for example, fine pattern printing is performed in a circle of φ11.0 mm. It is provided in the form of a display medium. Further, in the transmissive printing region 111, the line width is, for example, 0.3 mm.

  The non-printing region 12 is a region provided to transmit light received from the light source 3 as it is. In the present embodiment, the non-printing region 12 is a central region of the base material 10 and is provided as a region surrounded by the light-shielding printing region 110 so that the light from the light source 3 can be visually recognized on the surface side.

  The print layer 20 includes a display unit 13 that uses, as a display medium, light from the light source 3 that is irradiated from the back surface side of the substrate 10 and is transmitted to the surface side of the substrate 10. In addition, the printing layer 20 is provided in a light shielding layer 21 that shields light emitted from the light source 3 to the base material 10 except for the display unit 13 and a printing region 11 where the light shielding layer 21 is not printed. 21 and a light-transmitting step absorption layer 22 that removes the step between the display portion 13 and the display portion 13. The display unit 13 is provided adjacent to the same region as the transmissive printing region 111, and is formed in a hole shape by forming the light shielding layer 21. In addition, since FIG.1 (b) shows AA sectional drawing of Fig.1 (a), the display part 13 is shown in two places which show two sides among the round display parts 13. FIG.

  The light shielding layer 21 is formed on the light shielding printing area 110. The light shielding layer 21 is formed using, for example, black ink, and is formed to have a uniform thickness from the surface of the substrate 10. In the present embodiment, the light shielding layer 21 is formed on the frame portion of the base material 10, so that the light shielding layer 21 blocks the light irradiated to the frame portion from the light irradiated to the base material 10 from the light source 3. Formed possible. Thereby, the light shielding layer 21 can shield light leaking outside from the frame portion of the base material 10. In the present embodiment, the light shielding layer 21 is formed using black ink, and is formed to a thickness of 3 μm, for example, by flat printing of 270 B (bias). Here, the flat printing refers to printing in which unevenness due to the mesh of the screen mesh in contact with the display member 1 is flattened to suppress ink bleeding due to the unevenness of the photosensitive emulsion.

  The step absorption layer 22 is formed thicker than the light shielding layer 21 on the transmissive printing region 111. That is, the step absorption layer 22 is formed thicker than the light shielding layer 21 as the display unit 13 on the back surface side. Thereby, the step formed by the light shielding layer 21 and the display unit 13 can be eliminated by forming the step absorption layer 22. Further, since the step absorption layer 22 is formed on the display unit 13 on the back side, the step absorption layer 22 irradiates the transmission printing region 111 of the light irradiated from the light source 3 to the printing region 11 of the substrate 10. The transmitted light can be transmitted as a display medium. That is, the step absorption layer 22 is formed so that the light irradiated to the display unit 13 among the light irradiated to the printing region 11 of the base material 10 from the light source 3 can be transmitted as a display medium. Thereby, the step absorption layer 22 is formed in the frame portion of the base material 10 so that the light of the light source 3 that is irradiated from the back surface side of the base material 10 and transmits to the front surface side of the base material 10 can be displayed as a display medium. .

  Further, a part of the step absorption layer 22 is formed on the light shielding layer 21. The thickness of the step absorption layer 22 formed on the light shielding layer 21 is thinner than the depth of the step formed by the display unit 13 and the light shielding layer 21. Further, the height from the base material 10 on the surface of the step absorption layer 22 formed in the transmissive printing region 111 is equal to the height from the base material 10 on the surface of the step absorption layer 22 formed on the light shielding layer 21. The Thereby, the step absorption layer 22 eliminates the step formed by the display unit 13 and the light shielding layer 21.

  In the present embodiment, the step absorption layer 22 is formed using a medium ink, and is formed, for example, at a position of the transmissive printing region 111 with a thickness of 3 μm, for example.

  The configuration of the display member 1 according to this embodiment is as described above. Next, a method for manufacturing the display member 1 according to this embodiment will be described.

  As shown in FIG. 3, first, the light shielding layer 21 is printed in accordance with the light shielding printing area 110 in the printing area 11 which is a partial area on one surface of the substrate 10 (step S <b> 10). Thereafter, the step absorption layer 22 is printed in alignment with the transparent printing region 111 in the printing region 11 (step S20). The step absorption layer 22 is printed in the transmissive printing region 111 with a predetermined thickness that exceeds the thickness of the light shielding layer 21. For example, the step absorption layer 22 is printed with the light shielding layer 21 protruding beyond the thickness of the light shielding layer 21 so as to be thinner than the step formed by the base material 10 and the light shielding layer 21. Thereby, the step absorption layer 22 is sufficiently filled in the groove formed by the base material 10 and the display unit 13.

  Further, the portion of the step absorption layer 22 that exceeds the thickness of the light shielding layer 21 spreads on the surface of the light shielding layer 21 after printing. Thereby, the layer thickness of the step absorption layer 22 that exceeds the thickness of the light shielding layer 21 becomes thinner than that during printing. Thereby, the step absorption layer 22 can eliminate the step between the light shielding layer 21 and the display unit 13.

  And the display member 1 with which the light shielding layer 21 and the level | step difference absorption layer 22 were printed is dried at a drying process (step S30). In the drying process, the display member 1 is dried in a dryer, and the ink used for printing is dried.

  As described above, the display member and the manufacturing method thereof according to the present embodiment can prevent the unevenness on the surface of the base material even when the display member is attached to the light source while suppressing the manufacturing cost. Moreover, since unevenness | corrugation does not generate | occur | produce on the base-material surface, the designability of a display member can be improved. Furthermore, since the unevenness | corrugation does not generate | occur | produce on the base-material surface, even if a display member is affixed on a touch panel, it can prevent malfunctioning.

  Next, a second embodiment of the display member and the manufacturing method thereof according to the present invention will be described with reference to FIGS. In the display member 1 according to the second embodiment, the print layer 20 described in the first embodiment is different. Since other configurations are the same as those of the display member 1 according to the first embodiment, the description in the present embodiment is omitted. 4A and 6 show cross-sectional views at the same position as the AA line of the display member 1 shown in FIG. Moreover, Fig.6 (a) and (b) are the AA sectional drawing of the display member shown to Fig.1 (a), and are the top-and-bottom reversal.

  As shown in FIG. 4A, the print layer 20 includes a masking layer 23 formed on the base material 10, a light shielding layer 21 formed on the masking layer 23, and the light shielding layer 21 and the display unit 13. And a step absorption layer 22 for absorbing the step. The display unit 13 is provided with a groove provided adjacent to the masking layer 23 in the same area as the transparent printing area 111. 4B is a cross-sectional view taken along the line AA of FIG. 1A similar to the first embodiment, and therefore, the display unit 13 is provided at two positions indicating two sides of the round display unit 13. The grooves contained in are shown.

  The concealing layer 23 is formed on the base material 10 by printing on the entire printing region 11. The masking layer 23 is formed to have a uniform thickness on the substrate 10 and is formed by, for example, black transmission printing in which medium and black ink are mixed. Thereby, the concealment layer 23 can conceal the display unit 13 in a state in which the light from the light source 3 is not irradiated while having light transmittance. For example, when the light source 3 is an LED and the LED or the like is not lit, the concealing layer 23 does not display the display medium, and the LED or the like is lit so that the concealing layer 23 displays the display medium. Can do. The concealing layer 23 may be formed not in the entire printing area 11 but in at least the transmissive printing area 111.

  The light shielding layer 21 is formed on the masking layer 23 by printing. The light shielding layer 21 includes a first light shielding layer 210 formed on the substrate 10, and a second light shielding layer 220 formed on the first light shielding layer 210 and forming a step with the first light shielding layer 210. Have

  The first light shielding layer 210 is formed on the concealment layer 23 by printing in the same area as the light shielding printing area 110. That is, the first light shielding layer 210 is formed on the concealing layer 23 by printing in a region where the light emitted from the light source 3 to the base material 10 is shielded except for the display unit 13. Accordingly, the first light shielding layer 210 is formed with a groove. The first light shielding layer 210 is formed on the masking layer 23 with a uniform thickness, and is formed, for example, by printing with black ink. The first light shielding layer 210 has a thickness of 3 μm, for example.

  The second light shielding layer 220 is formed on the first light shielding layer 210 by printing having a hole 220a as shown in FIG. More specifically, the second light shielding layer 220 is formed on the first light shielding layer 210 by printing by enclosing the groove of the first light shielding layer 210 with the hole 220a. Accordingly, the hole 220a is connected to the groove of the first light shielding layer 210. For example, the hole 220a is formed in a circle of φ11.3 mm with respect to the groove of the first light shielding layer 210 formed in a circle of φ11.0 mm. Accordingly, the second light shielding layer 220 forms a step with the first light shielding layer 210. The second light shielding layer 220 is formed to have a uniform thickness on the first light shielding layer 210, and is formed, for example, by printing with black ink. The second light shielding layer 220 has a thickness of 3 μm, for example.

  The step absorption layer 22 is formed by printing in the groove of the first light shielding layer 210 and the hole 220 a of the second light shielding layer 220. The step absorption layer 22 is formed, for example, by printing a medium ink. Then, the step absorption layer 22 is formed on the masking layer 23 with the same thickness as the thickness of the light shielding layer 20 (the total thickness of the first light shielding layer 210 and the second light shielding layer 220). Thereby, the step absorption layer 22 is formed flat on the exposed surface of the second light shielding layer 220 on the exposed surface.

  The configuration of the display member 1 according to this embodiment is as described above. Next, a method for manufacturing the display member 1 according to this embodiment will be described.

  As shown in FIG. 5, first, the concealment layer 23 is printed on the printing region 11 of the base material 10 (step S50). Then, the 1st light shielding layer 210 is printed on the concealment layer 23 according to the light shielding printing area | region 110 (step S60). And the 2nd light shielding layer 220 is printed on the 1st light shielding layer 210 so that the position of the groove | channel of the 1st light shielding layer 210 may be enclosed by the hole part 220a (step S70).

  After the second light-shielding layer 220 is printed, the surfaces of the first light-shielding layer 210 and the concealing layer 23 adjacent to the groove and the second light-shielding layer 220 adjacent to the hole 220a, which are indicated by bold lines in FIG. 14 is processed by the surface modification process (step S80). The surface modification treatment is, for example, a corona discharge treatment or a plasma treatment, and a treatment for activating the surfaces 14 of the first light shielding layer 210, the second light shielding layer 220, and the masking layer 23 to increase the surface energy. Say. As a result, polar groups are generated on the first light shielding layer 210 and the concealing layer 23 adjacent to the groove and the surface 14 of the second light shielding layer 220 adjacent to the hole 220a, and thus the first light shielding layer 210 adjacent to the groove. And the wettability of the surface 14 of the shielding layer 23 and the 2nd light shielding layer 220 adjacent to the hole 220a can be improved rather than before a process. The surface modification treatment may be performed on the entire surface of the second light shielding layer 220, and the exposed portion of the entire back surface side of the base material 10 (for example, the surface of the base material 10, the exposed surface of the first light shielding layer, the first surface) 2 may be applied to the exposed surface of the light shielding layer and the exposed surface of the masking layer 23).

  After the surface modification treatment, the step absorption layer 22 is printed in accordance with the position of the groove of the first light shielding layer 210 as shown in FIG. 6B (step S90). The step absorption layer 22 is formed in accordance with the groove of the first light shielding layer 210. The step absorption layer 22 is printed in the hole 220a with a diameter smaller than the diameter of the hole 220a, and is printed so as to protrude from the surface of the second light shielding layer 220. For example, the step absorption layer 22 is printed so as to protrude from the surface of the second light shielding layer 220 in the hole 220a having φ11.3 mm in accordance with the diameter of the groove φ11.0 mm of the first light shielding layer 210.

  The step absorption layer 22 is printed with an ink amount corresponding to the volume of the groove of the first light shielding layer 210 and the hole 220a of the second light shielding layer 220. That is, the step absorption layer 22 is printed so as to have the same volume as the grooves of the first light shielding layer 210 and the hole 220a of the second light shielding layer 220 after drying. Therefore, at the time of printing, the amount of ink corresponding to the volume of the gap (groove) formed by the step absorption layer 22 and the hole 220a becomes the volume of the portion of the step absorption layer 22 protruding from the second light shielding layer 220. Printed as follows. For example, the amount of ink corresponding to the volume of a gap (groove) having a width of 0.3 mm formed between the step absorption layer 22 having φ11.0 mm and the hole 220a having φ11.3 mm is absorbed by the step. The layer 22 is printed so as to have a volume protruding from the second light shielding layer 220.

  In the present embodiment, the step absorption layer 22 is, for example, printed at 270 B (bias), for example, exceeding 6 μm and 16 μm depending on the wetting index of the surface 14 of the first light shielding layer 210 and the second light shielding layer 220. Printed to a thickness of up to.

  The step absorption layer 22 is then spread into the groove of the first light shielding layer 210 and the hole 220a of the second light shielding layer 220, so that the groove of the first light shielding layer 210 and the hole 220a of the second light shielding layer 220 are spread. Fill. Further, the step absorption layer 22 is in a state where the surface tension is lower than that before the treatment by the treatment for improving the wettability by the surface modification treatment of the surfaces of the first light shielding layer 210, the second light shielding layer 220, and the masking layer 23. Thus, fixing is performed in the groove of the first light shielding layer 210 and the hole 220a of the second light shielding layer. Further, the step formed between the second light-shielding layer 220 and the first light-shielding layer 210 at the boundary between the hole 220a and the ink of the printed step-absorbing layer 22 overflows from the hole 220a. The spread on the surface of the layer 220 is prevented. As a result, the step absorption layer 22 is sufficiently filled in the grooves and holes 220a, and forms a flat surface on the surface of the second light shielding layer 220 after drying.

  Here, even when the step absorption layer 22 is printed out of the groove of the first light shielding layer 210, if the step absorption portion 22 is printed in the hole 220a, the step absorption portion 22 is Since it spreads in the groove of the light shielding layer 210 and the hole 220a of the second light shielding layer 220, the groove of the first light shielding layer 210 and the hole 220a of the second light shielding layer 220 are sufficiently filled. The step absorbing portion 22 is formed in the groove of the first light shielding layer 210 due to the wettability of the surface 14 of the first light shielding layer 210 and the concealing layer 23 adjacent to the groove and the second light shielding layer 220 adjacent to the hole 220a. It is sufficiently fixed in the hole 220 a of the second light shielding layer 220. Further, the step formed between the second light-shielding layer 220 and the first light-shielding layer 210 at the boundary between the hole 220a and the ink of the printed step-absorbing layer 22 overflows from the hole 220a. The spread on the surface of the layer 220 is prevented. Therefore, even when the step absorption layer 22 is printed out of the groove of the first light shielding layer 210, the surface of the step absorption layer 22 is formed flat on the surface of the second light shielding layer 220.

  Thereafter, as in the first embodiment, the display member 1 on which the concealment layer 23, the first light shielding layer 210, the second light shielding layer 220, and the step absorption layer 22 are printed is dried in a drying process (step S100). . In the drying process, the display member 1 is dried in a dryer, and the ink used for printing is dried.

  As described above, the display member and the manufacturing method thereof according to the present embodiment are uneven on the substrate surface even when the display member is attached to the light source while suppressing the manufacturing cost, as in the first embodiment. Can be prevented. Moreover, since unevenness | corrugation does not generate | occur | produce on the base-material surface, the designability of a display member can be improved. Furthermore, since the unevenness | corrugation does not generate | occur | produce on the base-material surface, even if a display member is affixed on a touch panel, it can prevent malfunctioning.

  Further, since the surface 14 of the first light shielding layer 210 and the concealing layer 23 adjacent to the groove and the second light shielding layer 220 adjacent to the hole 220 a has wettability, the step absorption layer 22 is formed of the first light shielding layer 210. Fixing is performed in the groove and in the hole 220 a of the second light shielding layer 220. Since the surface of the step absorption layer 22 is formed flat on the surface of the second light shielding layer 220, the steps formed by the concealment layer 23, the first light shielding layer 210, and the second light shielding layer 220 can be sufficiently absorbed. . Furthermore, even when the step absorption layer 22 is printed out of the groove of the first light shielding layer 210, the step absorption layer 22 extends into the first light shielding layer 210 groove and the hole 220 a of the second light shielding layer 220. Therefore, the yield in manufacturing the display member 1 can be increased.

  In addition, the display member 1 and the manufacturing method thereof according to the present invention are not limited to the above-described embodiments, and it is needless to say that various changes can be made without departing from the gist of the present invention. Further, the configurations and methods of the plurality of embodiments described above may be arbitrarily adopted and combined (even if the configurations and methods according to one embodiment are applied to the configurations and methods according to other embodiments). Of course, it is of course possible to arbitrarily select configurations, methods, and the like according to various modifications described below and employ them in the configurations, methods, and the like according to the above-described embodiments.

  For example, in the display member 1 and the manufacturing method thereof according to the above-described embodiment, the base material 10 may be configured to have a light-transmitting property at a part thereof. For example, a part of the base material 10 may be formed of a light-shielding material, and the other part may be formed of a light-transmitting material. More specifically, the frame portion of the base material 10 may be formed of a light-shielding material, and other portions may be formed of a light-transmitting material.

  In the display member 1 and the manufacturing method thereof according to the above embodiment, the print region 11 is provided on the back surface side of the base material 10 facing the light source 3. However, the print region 11 is provided on the surface of the base material 10. It may be provided. In this case, the other surface of the base material 10 may be attached to a transparent plate material such as acrylic using a double-sided tape so that the light from the light source 3 can be visually recognized.

  Further, in the display member 1 and the manufacturing method thereof according to the above embodiment, the base material 10 is not limited to the deflection plate. Any material may be used for the base material 10 as long as it transmits light from the light source 3, and for example, an acrylic plate or a plastic plate can be used. The light source 3 is not limited to the liquid crystal display 33 or the touch panel 31, and any light source such as a fluorescent tube or an LED that can irradiate light may be used.

  In the display member 1 and the manufacturing method thereof according to the above-described embodiment, the light shielding layer 21 is not limited to black ink, and may be formed of any ink as long as it can shield light. However, in the case of using an ink having a low light shielding property such as white, it is necessary to make the light shielding layer 21 thicker.

  Further, in the display member 1 and the manufacturing method thereof according to the above embodiment, the ink used for the printing layer 20 is preferably pigment ink, but UV ink can also be used. Further, the step absorption layer 22 may be formed as a colored layer that transmits light by adding color to the medium ink.

  In the display member 1 and the manufacturing method thereof according to the above embodiment, the light-shielding print region 110 is printed on the frame portion of the base material 10. However, the present invention is not limited to this. It may be arbitrarily provided in a region to be shielded from the region.

  Further, in the display member 1 and the manufacturing method thereof according to the first embodiment, the medium ink is printed as the step absorption layer 22, but black transmission printing in which the medium ink and the black ink are mixed may be used. In this case, the step absorption layer 22 can conceal the display unit 13 in a state in which light from the light source is not irradiated while having light transmittance. The step absorption layer 22 can be configured to hide the display unit 13 when the liquid crystal display 33 is not displayed. In addition, for example, the step absorption layer 22 does not transmit light from the liquid crystal display 33 of the light source 3, and can transmit light having strong directivity such as an LED provided separately from the liquid crystal display 33. That is, when the LED or the like is not lit, the display unit 13 does not transmit light from the light source to the surface side of the substrate 10. When the LED or the like is lit, the display unit 13 can be configured to use the light of the light source 3 that is transmitted to the back surface side of the substrate 10 as a display medium. Therefore, such a display member 1 can be configured to display light of the light source 3 as a display medium at a specific place when necessary. When not necessary, the display medium 1 is displayed in the color of the light shielding layer 21. It can be configured to hide. When the display member 1 is employed in a car navigation display device, the display medium is always displayed at the same location, which is more preferable because the display member 1 that is more suitable for driving the vehicle can be provided.

  Further, in the display member 1 and the manufacturing method thereof according to the first embodiment, as in the second embodiment, as shown in FIG. 7, black transmission in which medium and black ink are mixed in the entire printing region 11. Printing may be performed before printing of the light shielding layer 21 to form a concealing layer 23 that conceals the display unit 13 while having light transparency and not being irradiated with light from the light source 3. Even in this way, when the LED or the like is not lit as described above, the display medium is not displayed, and the LED or the like is lit to display the display medium. Note that the concealment layer 23 may be formed at least in the transmissive print region 111 instead of the entire print region 11.

  In the display member 1 and the manufacturing method according to the second embodiment, the surface modification process is performed on the surfaces 14 of the first light shielding layer 210, the second light shielding layer 220, and the concealing layer 23 adjacent to the display unit 13. However, the step absorption layer 22 may be formed without performing the surface modification treatment.

  In the display member 1 and the manufacturing method thereof according to the second embodiment, the concealing layer 23 may not be printed as in the first embodiment. Further, the step absorption layer 22 may be black transmission printing in which medium ink and black ink are mixed. Further, the concealment layer 23 may be printed only in the transparent print region 111.

  Further, in the display member 1 and the manufacturing method thereof according to the second embodiment, the concealing layer 23 is subjected to the treatment for improving the wettability, but when the concealing layer 23 is not provided, The transparent print region 111 may be subjected to a process for improving wettability.

  DESCRIPTION OF SYMBOLS 1 ... Display member, 2, 32 ... Double-sided tape 3 ... Light source, 10 ... Base material, 11 ... Print area, 12 ... Non-print area, 13 ... Display part, 14 ... Surface, 20 ... Print layer, 21 ... Light shielding layer, 22 ... Step absorption layer, 23 ... Hiding layer, 31 ... Touch panel, 33 ... Liquid crystal display, 110 ... Light-shielding print region, 111 ... Transmission print region, 210 ... First light-shielding layer, 220 ... Second light-shielding layer, 220a ... Hole

Claims (5)

A substrate having a light transmission region at least in part, and a printed layer printed on at least a part of the light transmission region of the substrate, irradiated from the back side of the substrate and transmitted to the surface side of the substrate A print layer having a display unit that uses light of a light source as a display medium, the print layer having a light-shielding layer that shields the substrate except for the display unit, a light-transmitting layer, and the light-shielding layer and the display unit. have a level difference absorbing layer formed on the display unit in order to eliminate a step,
Wherein the light shielding layer includes a first light-shielding layer formed on the substrate, it is formed on the first light-shielding layer, to have a second light-shielding layer to form a step between the first light-shielding layer A display member. The printed layer further includes a concealing layer that conceals the display unit between the base material and at least the step-absorbing layer while having light transmission and not being irradiated with light from the light source. The display member according to claim 1, wherein a step between the layer and the concealing layer is eliminated. A step of printing a printed layer on at least a part of a light-transmitting region of a substrate having a light-transmitting region at least in part, the light of a light source being irradiated from the back side of the substrate and transmitted to the surface side of the substrate A printing layer having a display portion with the display medium as a display medium, and the step of printing the printing layer has a light-transmitting property and a step of forming a light-shielding layer that shields the substrate except for the display portion. , have a forming a step absorption layer on the display unit in order to eliminate the difference in level between the display section and the light-shielding layer,
The step of forming the light shielding layer includes a step of forming the first light shielding layer on the base material and a step of forming a second light shielding layer that forms a step between the first light shielding layer and the first light shielding layer. the method for manufacturing a display member, characterized in that the chromatic. The step of printing the printing layer includes at least a concealing layer on the base material that conceals the display unit in a state of being light transmissive and not irradiated with light from the light source before the step of forming the step absorption layer. The method for manufacturing a display member according to claim 3 , further comprising a step of forming the step corresponding to the step, wherein the step of forming the step absorption layer eliminates the step between the light shielding layer and the concealing layer. Before the step of forming the step absorption layer, the method further includes a step of performing a process of improving wettability on the surfaces of the first light shielding layer and the second light shielding layer at least at the position where the step absorption layer is formed. The manufacturing method of the display member of Claim 3 or 4 .

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