JP6119237B2 - Display device and manufacturing method thereof - Google Patents

Description

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

  As a conventional display device, for example, there is one disclosed in Patent Document 1. The display device according to Patent Document 1 irradiates light from the transparent body side of the display unit and irradiates light from the side surface of the transparent body after preparing a display unit on which a transparent body is arranged with a photocurable resin interposed therebetween. Thus, the photo-curable resin is cured. The reason for irradiating light from the side surface of the transparent body is that, for example, the transparent body is provided with a light shielding layer that partitions the display area of the display unit. This is because light does not reach the photocurable resin to be cured and cannot be sufficiently cured.

JP 2009-25833 A

  In the manufacturing method according to Patent Document 1, in order to sufficiently cure the photocurable resin, it is necessary to irradiate light from the display surface of the display unit and from each side surface direction, and there are many light irradiation directions. Therefore, the process of curing the photocurable resin is complicated.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a display device having a configuration that can easily cure a photocurable resin, and a method for manufacturing the display device.

In order to achieve the above object, a display device according to the first aspect of the present invention provides:
A display for displaying an image;
A transparent body located on the display side of the display unit;
A photo-curable resin located between the display unit and the transparent body;
A light guide that guides light emitted toward the display unit from the side opposite to the display side of the display unit and emits light from the side surface side of the display unit toward the display unit and the transparent body. With body ,
The transparent body is provided with a light shielding portion that surrounds an area where the display portion displays an image as viewed from the display side.
The light guide body, emitted toward the light guide between the light-shielding portion and the display portion,
It is characterized by that.

In order to achieve the above object, a method for manufacturing a display device according to the second aspect of the present invention includes:
Steps of preparing a display unit in which a transparent body is arranged on the display side across an uncured photocurable resin,
A light irradiation step of irradiating light from the opposite side of the display unit to a light guide fixed to the opposite side of the display side of the display unit,
The light guide guides the irradiated light and emits it from the side surface side of the display unit toward the display unit and the transparent body,
The light curable resin is cured by light emitted from the light guide,
It is characterized by that.

  According to the present invention, it is easy to cure the photocurable resin.

1 is a plan view of a display device according to a first embodiment of the present invention. (A) is the sectional view on the AA line shown in FIG. 1 of a display apparatus. FIG. 2B is an enlarged view in the vicinity of a portion B shown in FIG. It is a figure for demonstrating the manufacturing process of a display apparatus. (A) And (b) is a figure for demonstrating the manufacturing process of a display apparatus. (A) And (b) is a figure for demonstrating the manufacturing process of a display apparatus. (A) is a figure for demonstrating the light guide which concerns on the modification 1. FIG. (B) is a figure for demonstrating the light guide which concerns on the modification 2. FIG. It is sectional drawing of the display apparatus which concerns on 2nd Embodiment of this invention. It is sectional drawing of the display apparatus which concerns on 2nd Embodiment of this invention.

  A display device according to an embodiment of the present invention will be described with reference to the drawings.

[First Embodiment]
The display device 100 according to the first embodiment of the present invention has the appearance shown in FIG. 1 and is mounted on a vehicle, for example. The display device 100 displays an image (hereinafter referred to as a notification image) for notifying the user of vehicle information such as speed, engine speed, navigation information, music information, and the like.

  As shown in FIG. 2, the display device 100 includes a transparent body 1, a display unit 2, a bezel 3, a photocurable resin 4, a light guide body 5, a caulking member 6, a holder 7, and a case body. 8 and a control board 9. These parts are housed in a housing H shown in FIG. In the housing H, an opening for visually recognizing a display surface 21 described later of the display unit 2 is formed.

  The transparent body 1 is made of inorganic glass, transparent resin, or the like, and has light transmittance. The transparent body 1 is formed in a flat plate shape, for example. The transparent body 1 is located on the display side of the display unit 2 and allows the notification image displayed on the display unit 2 to be seen through. Moreover, the transparent body 1 protects storage components such as the display unit 2 from water and dust.

  The transparent body 1 is provided with a light shielding portion 11 surrounding a region (display region) where the display unit 2 displays a notification image as viewed from the display side. Specifically, the light shielding unit 11 is formed on the back surface (surface on the display unit 2 side) of the transparent body 1. The light shielding unit 11 is made of, for example, a black print layer, and partitions the display area and the non-display area of the display unit 2. The light shielding part 11 may be formed on the front surface. Moreover, the light-shielding part 11 may be formed in the front surface and the back surface.

  The display unit 2 displays a notification image on the display surface 21. The display unit 2 is composed of, for example, a flat panel display (FPD). As the flat panel display, a liquid crystal display (for example, a TFT-LCD (Thin Film Transistor-Liquid Crystal Display)) that performs transmission display using light from a backlight, an organic EL (ElectroLuminescence) display, or the like can be used.

  The bezel 3 is a member for reinforcing the display unit 2 and is made of a predetermined metal or the like. The bezel 3 is formed so as to surround the back surface and the side surface of the display unit 2. The bezel 3 covers the outer peripheral portion of the display surface 21. Here, as shown in FIGS. 2A and 2B, the light shielding unit 11 is formed so as to cover the display surface 21 side portion of the bezel 3 when viewed from the display side. Thereby, the bezel 3 is not visually recognized by the user.

  The photocurable resin 4 fills the space between the transparent body 1 and the display surface 21 of the display unit 2 without a gap. The photocurable resin 4 is also located on the display surface 21 side portion of the bezel 3. The photocurable resin 4 is made of, for example, an ultraviolet curable resin that is cured by irradiation with ultraviolet rays. As photocurable resin 4, it can select suitably from well-known things according to the objective. The photocurable resin 4 is cured by being irradiated with light (ultraviolet rays) in the manufacturing process. The manufacturing process will be described in detail later. Since the photocurable resin 4 fills the space between the transparent body 1 and the display unit 2, there is no air layer between them. Thereby, the diffuse reflection of light is reduced and the visibility of the display device 100 is improved.

The light guide 5 is a transparent member having light guide properties. The light guide 5 is made of acrylic resin such as PMMA resin, for example. The light guide 5 has a bottom 51 and a standing part 52.
The bottom 51 is located on the side opposite to the display side of the display unit 2. For example, the bottom 51 is formed so as to uniformly cover the back side of the bezel 3.
The standing portion 52 stands from the bottom portion 51 toward the transparent body 1 side. For example, the standing portion 52 is formed so as to surround the side periphery of the display portion 2. A reflecting surface 52a is formed at the end of the standing portion 52 on the transparent body 1 side as shown in FIG. The reflection surface 52a will be described later together with the function of the light guide 5.

  The caulking member 6 is made of, for example, a stainless plate, and is caulked and fixed with the transparent body 1 and the case body 8 interposed therebetween.

  The holder 7 is made of a predetermined resin and is located in a sealed space formed by the transparent body 1 and the case body 8. The light guide 5 is fixed to the holder 7 with a screw S1. Further, the bezel 3 is fixed to the light guide 5 by screws S2. With such a structure, the holder 7 holds the display unit 2, the bezel 3, and the light guide 5. The fixing method described above may be based on adhesion, welding, or the like without depending on the screws S1 and S2.

  The case body 8 is made of a metal such as AES resin or aluminum. The case body 8 is formed in a box shape that opens to the user side. The transparent body 1 is provided so as to close the opening. The case body 8 houses the display unit 2, the bezel 3, the photocurable resin 4, the light guide body 5, the holder 7, and the control board 9.

  The control board 9 is a printed circuit board on which a control unit (not shown) composed of a microcontroller or the like is mounted. The control board 9 and the display unit 2 are electrically connected by a flexible wiring board (not shown), and the display unit 2 performs a display operation under the control of the control unit. The control board 9 is located on the back side of the light guide 5.

  Next, an example of a method for manufacturing the display device 100 configured as described above will be described.

(A. Pre-irradiation process)
First, the display unit 2 in which the transparent body 1 is arranged on the display side is prepared with the uncured photocurable resin 4 interposed therebetween.
Specifically, it consists of the following steps.
(A1) The display unit 2 provided with the bezel 3 is prepared, and the light guide 5 is fixed to the bezel 3 with screws S2. In this way, the display unit 2 to which the light guide 5 is fixed is prepared.
(A2) Next, the uncured photocurable resin 4 is applied to the display surface 21 of the display unit 2 using a coating device (dispenser).
(A3) Subsequently, the transparent body 1 provided with the light shielding portion 11 is prepared, and the transparent body 1 is placed on the display portion 2 so that the photocurable resin 4 is sandwiched between the display portion 2 and the transparent body 1. To place.
In addition, after apply | coating the photocurable resin 4 to the transparent body 1, you may arrange | position the display part 2. FIG. Moreover, after apply | coating the photocurable resin 4 to each of the transparent body 1 and the display part 2, you may arrange | position both.
(A4) Subsequently, the roll or the like is moved on the transparent body 1 so that the photocurable resin 4 is uniformly distributed on the display surface 21 of the display unit 2. Note that the amount of the photocurable resin 4 applied in the application process is adjusted so that the photocurable resin 4 just covers the portion of the bezel 3 on the display surface 21 side through this roll process. .
Through the above steps, as shown in FIG. 3, the light guide 5 is fixed to the display unit 2 covered with the bezel 3, and the uncured photocurable resin 4 is interposed between the display unit 2 and the transparent body 1. A filled pre-light irradiation component 101 is prepared.

(B. Light irradiation process)
Subsequently, as shown in FIG. 3, the pre-light irradiation component 101 is irradiated with light (ultraviolet rays) to cure the photocurable resin 4.
Specifically, the pre-light-irradiation component 101 is formed by using a UV (ultraviolet) lamp 201 disposed on the front surface (display surface 21 side) of the display unit 2 and a UV lamp 202 positioned on the rear surface side of the display unit 2. Irradiate ultraviolet rays at once from the front and back sides. In addition, only one of the UV lamp 201 and the UV lamp 202 is prepared, and after irradiating ultraviolet rays from one surface side of the pre-light irradiation component 101, the pre-light irradiation component 101 is turned over, and the ultraviolet light is irradiated from the other surface side. By irradiating, as a result, ultraviolet rays may be irradiated from both sides.

  Here, when the ultraviolet rays are only irradiated from the front side of the display unit 2, as shown in FIG. 4A, the portion of the photocurable resin 4 that is covered with the light shielding unit 11 when viewed from the display side. No ultraviolet rays reach 41. For this reason, the portion 41 is not sufficiently cured. However, when the ultraviolet light is also irradiated from the back side of the display unit 2, the ultraviolet light efficiently reaches the portion 41 by the function of the light guide 5, and the portion 41 can be cured. Hereinafter, the function of the light guide 5 will be described with reference to FIG.

  As shown in FIG. 4B, the ultraviolet light irradiated from the back side of the display unit 2 is incident on the bottom 51 of the light guide 5. Part of the ultraviolet light incident on the bottom portion 51 is guided to the standing portion 52 and travels toward the transparent body 1 side. A reflection surface 52 a is formed at the tip of the standing portion 52. The reflection surface 52 a is formed as a surface that efficiently reflects light from the lower side in FIG. 4B toward the photocurable resin 4 from the side surface side of the display unit 2. The ultraviolet light guided to the standing portion 52 is reflected by the reflecting surface 52 a and emitted toward the space between the transparent body 1 and the display portion 2. Thereby, the ultraviolet rays are also irradiated to the portion 41 that is not sufficiently cured only by the irradiation of ultraviolet rays from the front side, and the portion 41 is also cured. In this way, the light curable resin 4 (particularly, the portion 41) is cured by the ultraviolet light guided by the light guide 5 and emitted.

  The photocurable resin 4 is cured by irradiation of ultraviolet rays from the front and back sides of the display unit 2, and the transparent body 1 and the display surface 21 of the display unit 2 are fixed via the photocurable resin 4. Further, the transparent body 1 and a part of the bezel 3 are also fixed via the photocurable resin 4. In this way, the photocurable resin 4 is filled between the transparent body 1 and the display unit 2 without a gap.

(C. Other processes)
(C1) Subsequently, as shown in FIG. 5A, the holder 7 is fixed to the light guide 5 of the post-irradiation component 102 with a screw S1.
(C2) Subsequently, the case body 8 on which the control board 9 is disposed is prepared. Then, as shown in FIG. 5B, the post-light-irradiated component 102 to which the holder 7 is fixed is housed in the case body 8, and the transparent body 1 and the case body 8 are caulked and fixed by the caulking member 6. Note that the display unit 2 and the control board 9 are wired before caulking and fixing.
As a result, the display device 100 is in the state shown in FIG. 2A, and the display device 100 shown in FIG.

  In addition, the light guide 5 is not restricted to the shape which has the reflective surface 52a. An example of modification is shown below.

(Modification 1)
As shown in FIG. 6A, a lens-shaped condensing part 52 b may be formed on the bottom 51 side of the standing part 52 of the light guide 5. The condensing unit 52b has a curved surface that condenses the incident ultraviolet rays that are irradiated from the back side of the display unit 2 toward the gap between the display unit 2 and the transparent body 1 in the light irradiation step described above. It is formed. That is, the condensing part 52 b condenses the irradiated ultraviolet rays toward the part 41 covered with the light shielding part 11.

(Modification 2)
As shown in FIG. 6B, the light diffusion portion 52 c may be formed at the transparent body 1 side end portion and the portion 41 side end portion of the standing portion 52. The light diffusing unit 52 c diffuses ultraviolet rays irradiated from the back side of the display unit 2 and directs it between the display unit 2 and the transparent body 1. That is, the light diffusing unit 52 c diffuses the irradiated ultraviolet light and directs it toward the portion 41 covered with the light shielding unit 11. For example, the light diffusion portion 52c is formed of fine irregularities formed by embossing. The embossing is performed by a known process such as a blast process or a polishing process. In this case, in the light irradiation step described above, the ultraviolet light that is incident from the back side of the display unit 2 and is guided in the direction of the transparent body 1 by the standing unit 52 reaches the light diffusion unit 52c and is diffused. A part of the diffused ultraviolet rays reaches a portion 41 covered with the light shielding portion 11.

  The light guide 5 may be formed to have a plurality of functions among the reflection function by the reflection surface 52a, the light collection function by the light collection unit 52b, and the diffusion function by the light diffusion unit 52c described above. If the light guide 5 is formed so as to have these functions, the ultraviolet light irradiated from the back side of the display unit 2 is more efficiently applied to the portion 41 covered with the light shielding unit 11 in the light irradiation process. Can lead.

  In addition, since the light guide 5 is fixed to the bezel 3 and the holder 7, it also has a function of reinforcing the display unit 2. Thereby, for example, even in an environment where the display device 100 is mounted on a vehicle (such as a motorcycle) and strong vibrations are applied, it is possible to reduce damage of the photocurable resin 4.

[Second Embodiment]
A second embodiment of the present invention will be described with reference to FIG. Hereinafter, members having the same functions as those of the first embodiment will be described using the same reference numerals as those of the first embodiment.
The second embodiment is different from the first embodiment in the shape of the transparent body 1. The transparent body 1 is made of an acrylic resin such as PMMA resin, for example. On the front surface (user side surface) of the transparent body 1, an inclined surface 1a is formed. The inclined surface 1a is radiated from the front side of the display unit 2 and refracts incident ultraviolet rays in the light irradiation step described above. The ultraviolet rays refracted by the inclined surface 1a reach a part of the portion 41 covered with the light shielding portion 11 in plan view. In the second embodiment, as described above, the ultraviolet rays reach the portion 41 even when the ultraviolet rays are irradiated from the front side of the display unit 2. Thereby, when the ultraviolet rays are emitted from the front side of the display unit 2, the ultraviolet rays reach the portion 41, so that the portion 41 can be cured together with the ultraviolet irradiation from the back side of the display unit 2.

[Third Embodiment]
A third embodiment of the present invention will be described with reference to FIG.
The third embodiment is different from the first and second embodiments in the shape of the transparent body 1. In the third embodiment, the light guide 5 is not provided around the display unit 2.
The transparent body 1 according to the third embodiment is made of an acrylic resin such as PMMA resin, for example. As shown in FIG. 8, the light shielding unit 11 that partitions the display area and the non-display area of the display unit 2 is formed on the front surface of the transparent body 1. On the front surface of the transparent body 1, a first inclined surface 1b having the same function as in the second embodiment is formed. The first inclined surface 1b is irradiated from the front side of the display unit 2 and refracts incident ultraviolet rays in the light irradiation step. The ultraviolet light refracted by the first inclined surface 1b reaches a part of the portion 41 covered with the light shielding portion 11 in plan view. In addition, a protrusion 12 that protrudes toward the back surface is formed on the back surface of the transparent body 1. The lower surface in FIG. 8 of the protrusion 12 is a second inclined surface 1c. In the light irradiation step, the second inclined surface 1c is irradiated from the back side of the display unit 2 and refracts incident ultraviolet rays. The ultraviolet rays refracted by the second inclined surface 1c reach the portion 41 covered with the light shielding portion 11 in plan view. In the third embodiment, the ultraviolet rays efficiently reach the portion 41 by the function of the transparent body 1 having the first inclined surface 1b and the second inclined surface 1c as described above. Thereby, even if the light guide 5 that is separate from the transparent body 1 is not provided, the ultraviolet rays can reach the portion 41 and the photocurable resin 4 can be sufficiently cured.

The display device 100 described above includes a display unit 2 that displays an image, a transparent body 1 that is positioned on the display side of the display unit 2, and a photocurable resin 4 that is positioned between the display unit 2 and the transparent body 1. The light emitted from the side opposite to the display side of the display unit 2 toward the display unit 2 is guided and emitted from the side surface side of the display unit 2 toward the display unit 2 and the transparent body 1. A light body 5.
The method for manufacturing the display device 100 described above includes a step of preparing the display unit 2 in which the transparent body 1 is disposed on the display side with the uncured photocurable resin 4 interposed therebetween, and a display side of the display unit 2. A light irradiation step of irradiating light from the opposite side of the display unit 2 to the light guide 5 disposed on the opposite side of the light guide 5, the light guide 5 guides the irradiated light, The light curable resin 4 is emitted from the side surface side of the display unit 2 between the display unit 2 and the transparent body 1, and the light curable resin 4 is cured by the light emitted from the light guide 5.
Thus, since the light from the back side can be guided between the display unit 2 and the transparent body 1 by the function of the light guide 5, the light irradiation from the side of the display unit 2 is omitted. It is possible. Therefore, according to the display device 100 and the manufacturing method thereof, it is easy to cure the photocurable resin 4.

  In the display device 100, the transparent body 1 is provided with a light shielding portion 11 that surrounds a region where the display portion 2 displays an image when viewed from the display side. The light is emitted between the display unit 2 and the light shielding unit 11. The light guide 5 includes a bottom 51 located on the opposite side to the display side of the display unit 2, and a standing part 52 standing from the bottom 51 toward the transparent body 1. The guided light is emitted from the standing part 52 and is incident between the display part 2 and the transparent body 1.

  In addition, the standing portion 52 is provided with a reflection surface 52 a that reflects light emitted from the opposite side of the display portion 2 toward the display portion 2 and the transparent body 1. The standing portion 52 may be provided with a light condensing portion 52 b that condenses light emitted from the side opposite to the display side of the display portion 2 between the display portion 2 and the transparent body 1. . The standing portion 52 may be provided with a light diffusing portion 52 c that diffuses light irradiated from the side opposite to the display side of the display portion 2 and directs it between the display portion 2 and the transparent body 1. .

  Further, in the method for manufacturing the display device 100, the transparent body 1 is provided with the light shielding portion 11 surrounding the region where the display portion 2 displays an image when viewed from the display side. In the light irradiation step, the display portion 2 is provided. The light curable resin 4 positioned on the display part side of the transparent part is irradiated with light from the display side toward the transparent body 1 and light transmitted through the transparent part of the transparent body 1 by light irradiation from the display side. The photocurable resin 4 (part 41) located on the display unit 2 side of the light shielding unit 11 is cured by light irradiation from the side opposite to the display side of the display unit 2.

  In addition, this invention is not limited by the above embodiment, a modified example, and drawing. Changes (including deletion of components) can be made as appropriate without departing from the scope of the present invention.

  For example, the light guide 5 may be used only in the manufacturing process, and the final product display device 100 may not be provided with the light guide 5.

  The light shielding unit 11 is not limited to the print layer that partitions the display area. For example, the transparent body 1 may be a transparent base material of a touch panel disposed on the display side of the display unit 2, and the light shielding unit 11 may be a wiring provided on the transparent base material.

  In the above description, in order to facilitate the understanding of the present invention, the description of known unimportant technical matters is appropriately omitted.

DESCRIPTION OF SYMBOLS 100 Display apparatus 1 Transparent body 11 Light-shielding part 2 Display part 21 Display surface 3 Bezel 4 Photocurable resin 5 Light guide 51 Bottom 52 Standing part 52a Reflecting surface 52b Condensing part 52c Light diffusion part

Claims (7)

A display for displaying an image;
A transparent body located on the display side of the display unit;
A photo-curable resin located between the display unit and the transparent body;
A light guide that guides light emitted toward the display unit from the side opposite to the display side of the display unit and emits light from the side surface side of the display unit toward the display unit and the transparent body. With body ,
The transparent body is provided with a light shielding portion that surrounds an area where the display portion displays an image as viewed from the display side.
The light guide body, emitted toward the light guide between the light-shielding portion and the display portion,
A display device characterized by that. The light guide has a bottom portion located on the opposite side of the display portion from the display side, and a standing portion standing from the bottom portion toward the transparent body,
The light guided to the light guide is emitted from the standing part and is incident between the display part and the transparent body.
The display device according to claim 1 . The standing portion is provided with a reflecting surface that reflects light emitted from the side opposite to the display side of the display portion toward the display portion and the transparent body.
The display device according to claim 2 . The standing portion is provided with a condensing portion that condenses the light irradiated from the opposite side of the display portion to the display portion and the transparent body.
The display device according to claim 2 or 3, characterized in that. The standing portion is provided with a light diffusing portion that diffuses light irradiated from the side opposite to the display side of the display portion and directs it between the display portion and the transparent body.
Display device according to any one of claims 2 to 4, characterized in that. Steps of preparing a display unit in which a transparent body is arranged on the display side across an uncured photocurable resin,
A light irradiation step of irradiating light from the opposite side of the display unit to a light guide fixed to the opposite side of the display side of the display unit,
The light guide guides the irradiated light and emits it from the side surface side of the display unit toward the display unit and the transparent body,
The light curable resin is cured by light emitted from the light guide,
A manufacturing method of a display device, The transparent body is provided with a light shielding portion that surrounds an area where the display portion displays an image as viewed from the display side.
In the light irradiation step, light is irradiated from the display side of the display unit toward the transparent body,
By irradiating light from the display side, the light transmitted through the transparent part of the transparent body, and curing the photocurable resin located on the display part side of the transparent part,
By irradiating light from the opposite side, the photocurable resin located on the display unit side of the light shielding unit is cured,
The method for manufacturing a display device according to claim 6 .

Images