JP2020126177A - Display - Google Patents

Abstract

To provide a display that can improve productivity.SOLUTION: A display comprises: a plurality of display units 20; a case member 10 that accommodates the plurality of display units 20 and has one opening 10a for exposing the plurality of display units 20 to the front side; a plurality of transmission members 40 that are fixed to the front faces of the plurality of display units 20; and a film-like adhesive member 60 that is attached to the front faces 40a of the plurality of transmission members 40 and connects the plurality of display units 20 with the plurality of transmission members 40 therebetween. The film-like adhesive member 60 has shield layers 63 for shielding the boundaries 24 between the plurality of adjacent display units 20 and the boundaries 44 between the plurality of adjacent transmission members 40.SELECTED DRAWING: Figure 2

Description

The present invention relates to a display device mounted on a vehicle or the like.

Conventionally, there is known a display device in which a plurality of display units are bonded to a single translucent plate-shaped transmissive member via a transparent adhesive (see, for example, Patent Document 1). This display device can give a sense of unity when a plurality of display units are viewed.

JP, 2005-148680, A

Each display unit is sequentially attached to the transmissive member via a transparent adhesive. However, when the sticking of one display unit is defective, even if the sticking of the other display unit is good, it becomes a defective product and the yield is reduced. In addition, since it is necessary to attach a plurality of display units to the transmissive member, productivity is reduced.

The present invention has been made in consideration of such circumstances, and an object thereof is to provide a display device capable of improving productivity.

In order to solve the above-described problems, a display device according to the present invention has a case member having a plurality of display portions and one opening that houses the plurality of display portions and exposes the plurality of display portions to the front side. A plurality of transmissive members fixed to the front surface of each of the plurality of display portions, and a film shape that is attached to the front surfaces of the plurality of transmissive members and connects the plurality of display portions via the plurality of transmissive members. And an adhesive member.

In the display device according to the present invention, productivity can be improved.

The front view which shows embodiment of the display apparatus which concerns on this invention. Sectional drawing which follows the II-II line of FIG. Sectional drawing which shows the modification of the display apparatus which concerns on this invention. Sectional drawing which shows the other modification of the display apparatus which concerns on this invention.

An embodiment of a display device according to the present invention will be described with reference to the accompanying drawings. The display device according to the present invention can be applied to all display devices having a plurality of display parts and a configuration in which the display parts are viewed through a common transparent member, for example, a vehicle such as an automobile or a two-wheeled vehicle, It can be mounted on ships, agricultural machines, and construction machines.

FIG. 1 is a front view showing a display device 1 which is an embodiment of a display device according to the present invention.
FIG. 2 is a sectional view taken along the line II-II of FIG.

In the following description, “front (front)”, “rear (rear)”, “top”, “bottom”, “right”, and “left” are the definitions “Fr.” and “Fr.” in FIGS. Re.”, “To.”, “Bo.”, “R”, and “L”.

The display device 1 mainly includes a case 10, a display unit 20, a circuit board 30, a cover 40, a translucent adhesive 50, and a film 60.

The case (case member) 10 is made of black resin such as polypropylene. The case 10 covers and accommodates the plurality of display units 20, the circuit board 30 and the like from the back side, and protects them from external impact, dust and the like. The case 10 has an opening 10a. The opening 10a exposes the plurality of display panels to the front side. Further, the case 10 has a middle case (not shown). The middle case is made of white synthetic resin (for example, polypropylene), and supports the display unit 20, the circuit board 30, and the like inside the case 10.

The display unit (display unit) 20 has a display panel and a backlight unit.

The display panel is, for example, a TFT (Thin Film Transistor) type normally black type (black display when no voltage is applied) liquid crystal display panel. The display panel has a pair of surface glass substrates enclosing a liquid crystal layer. Transparent electrodes are formed of ITO (Indium Tin Oxide) or the like on the pair of glass substrates. Further, the display panel has a pair of surface polarizing plates (polarization filters) arranged so as to sandwich the pair of surface glass substrates. The display panel is connected to the circuit board 30 via FPC (Flexible Printed Circuits) 21. The display panel is controlled by the control unit of the circuit board 30 to apply a drive voltage to the liquid crystal layer via the transparent electrode. As a result, the orientation of the liquid crystal molecules in the liquid crystal layer is controlled, and the transmittance of each pixel of the display panel is changed to display an image.

The backlight unit is provided on the back side of the display panel. The backlight unit mainly has a light source substrate and a light guide, and illuminates the display panel from the back side. The light source substrate mounts a plurality of LEDs (Light Emitting Diodes), which are an example of a light source. The light source board is connected to the circuit board 30 via a flexible board such as the FPC 21. When the drive current is supplied, the LED emits light toward the light guide. The light guide guides the light emitted from the LED toward the display panel. The light guide body is a transparent resin (for example, polymethylmethacrylate resin (PMMA)) formed in a flat plate shape.

The circuit board 30 mainly has a control unit for controlling the display unit 20. The control unit includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and executes a predetermined arithmetic processing according to a program written in the ROM, for example. The control unit acquires, for example, vehicle speed, engine speed, various vehicle information, navigation information and the like from an ECU (Electronic Control Unit) of the vehicle via various sensors and the like. The control unit causes the display unit 20 to display information based on the acquired information.

The cover (transmissive member) 40 is a plurality of transmissive members fixed to the front surfaces of the plurality of display units 20, and is a plate-shaped thermoplastic resin having translucency (for example, polycarbonate resin, inorganic glass, or PMMA). Is. A plurality of covers 40 are provided according to the number of display units 20.

The translucent adhesive (adhesive member) 50 is formed between the display panel of the display unit 20 and the cover 40 so as to be in close contact with both the display panel and the cover 40. Fixed to. That is, the translucent adhesive 50 is an adhesive that adheres the display panel and the cover 40 by optical bonding. The translucent adhesive 50 is a transparent resin material (for example, silicone-based, urethane-based, or acrylic-based resin) having a refractive index almost equal to that of the cover 40. The translucent adhesive 50 can reduce the interface reflectance between the cover 40 and the display panel.

The film (film-like adhesive member) 60 is attached to the front surfaces 40 a of the plurality of covers 40 and connects the plurality of display units 20 via the covers 40. The film 60 has an outer shape that matches the outer shape when the cover 40 is arranged in the left-right direction. The integrated cover 40 and film 60 cover the opening 10a of the case 10 to protect the display unit 20 and the circuit board 30 inside the case 10 from dust and the like.

The film 60 has a film layer 61, an adhesive layer 62, and a shielding layer 63. The film 60 preferably has, for example, a scattering prevention function of the cover 40. The film layer 61 is a resin film having a hard coat film, AR (Anti-Reflection), AG (Anti-Glare), etc. (for example, polyester film, TAC (Triacetylcellulose) film, acrylic film, etc.). The adhesive layer 62 is formed on the back surface of the film layer 61 and has adhesiveness for adhering the film 60 to the cover 40. The shielding layer 63 is a printing layer (for example, a black printing layer) that covers and shields the boundaries 24 of the adjacent display units 20 attached to the back surface 60b of the film 60 and the boundaries 44 of the cover 40 so as not to be visually recognized from the front. ). The shielding layer 63 is formed on the back surface of the film layer 61 (between the film layer 61 and the adhesive layer 62), and is formed in a linear shape in the vertical direction so as to correspond to the boundaries 24 and 44.

Next, an operation for connecting the plurality of display units 20 and the cover 40 with the film 60 will be described.

First, each cover 40 is fixed to the front surface of each display unit 20 via the translucent adhesive 50. Thereby, each display unit 20 is integrated with the cover 40.

Next, the integrated display unit 20 and cover 40 (hereinafter referred to as “covered display unit 25”) are sequentially attached to the back surface 60b of the film 60. As a result, the three sets of the display unit with cover 25 are connected by the film 60, and the film 60, the plurality of display units 20 and the plurality of covers 40 become one assembly part. At this time, the boundaries 24 of the adjacent display units 20 and the boundaries 44 of the cover 40 are shielded by the shielding layer 63. Does not impair the sense of unity.

Such a display device 1 can improve productivity. That is, when a plurality of display units 20 are attached to one cover with the translucent adhesive 50, if one display unit 20 is attached poorly, it is determined that the other display units 20 are attached well. Also becomes a defective product as a whole, and as a result, the yield decreases. Further, the sticking of the cover 40 and the display unit 20 with the translucent adhesive 50 is carried out in a vacuum device in order to suppress bubbles. When a plurality of display units 20 are attached to one cover, the size of the cover becomes large, and as a result, the vacuum device becomes large. Increasing the size of the vacuum device increases the cost of the device and the production cost. Further, since the translucent adhesive 50 has a stronger adhesive force than the adhesive layer 62, it is difficult to peel off the cover 40 and the display unit 20 adhered with the translucent adhesive 50. Even if it could be peeled off, the translucent adhesive 50 remained on either the cover 40 or the display unit 20 and could not be reused.

On the other hand, in the display device 1 according to the present embodiment, each display unit 20 and each cover 40 are integrated, and the plurality of display units with covers 25 may be attached to the film 60. If the attachment to the film 60 is defective, the display unit with cover 25 may be peeled from the film 60 and attached again to the new film 60. Therefore, the yield of the display device 1 can be improved. Further, when the display unit with cover 25 is formed by the translucent adhesive 50, the vacuum device can be downsized as compared with the above case.

While some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are also included in the invention described in the claims and the scope equivalent thereto.

For example, in the above-described embodiment, the adhesive layer 62 of the film 60 may have a smoke tone (for example, a black-based black smoke having a relatively small transmittance). This makes it possible to further shield the boundaries 24 and 44 between the adjacent display units 20 and the cover 40. The cover 40 may also be smoked. As a result, the display device 1 is less likely to be visually recognized inside, and a seamless feeling can be produced.

Further, as shown in FIG. 3, a smoke-like OCA (Optically Clear Adhesive) 80 (adhesive member) having adhesiveness may be provided between the cover 40 and the translucent adhesive 50. In this case, it is preferable that the OCA 80 is not provided with a film layer. When the film layer is provided, warpage of the cover 40 due to shrinkage of the film layer, retardation due to the film layer, and increase in interface reflectance due to the film layer may occur. For this reason, it is preferable not to provide the film layer in order to reduce these disadvantages caused by providing the OCA 80 separately.

Further, the OCA 80 may function as a correction adhesive layer that corrects the difference in color tone between the display units 20. That is, each display unit 20 may have members having different specifications and different reflectances (for example, an optical film, a polarizing plate, an in-cell touch panel). In such a case, the difference in reflectance can be corrected by making the color tone of the smoke of the cover 40 and the OCA 80 provided in each display unit 20 different.

Further, as shown in FIG. 4, the OCA 80 may be provided only in the necessary display unit 20. In FIG. 4, the display unit 20a on the left side has a capacitance type out-cell touch panel 81. On the other hand, the display unit 20b on the right side does not have the touch panel 81. In such a case, since the display unit 20a has the touch panel 81, the display unit 20a has a higher reflectance and the ITO electrode changes the color tone. By providing the OCA 80 only on the display unit 20a, the OCA 80 can correct the difference in color tone between the display units 20a and 20b as a correction adhesive layer.

1 Display device 10 Case (case member)
10a Openings 20, 20a, 20b Display unit (display section)
21 FPC
24, 44 boundary 25 display unit with cover 30 circuit board 40 cover (transmissive member)
40a front surface 50 translucent adhesive (adhesive member)
60 film (film-like adhesive member)
60b Back surface 61 Film layer 62 Adhesive layer 63 Shielding layer 80 OCA (adhesive member)
81 touch panel

Claims (5)

Multiple display units,
A case member that accommodates the plurality of display portions and has one opening that exposes the plurality of display portions to the front surface side;
A plurality of transparent members fixed to the front surface of each of the plurality of display portions,
A display device, comprising: a film-like adhesive member that is attached to the front surfaces of the plurality of transmissive members and that connects the plurality of display units via the plurality of transmissive members. The display device according to claim 1, wherein the film-like adhesive member includes a shielding layer that shields boundaries between the plurality of adjacent display units and the plurality of transmissive members. The display device according to claim 1, wherein the film-like adhesive member has a smoke-like adhesive layer. The display device according to claim 1, wherein at least one of the plurality of transmission members has a smoke tone. Further comprising a plurality of adhesive members for fixing the plurality of display units and the plurality of transparent members,
The display device according to claim 1, wherein at least one of the plurality of adhesive members has a correction adhesive layer that corrects a difference in color tone between the display units.

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