JP2018194866A - Display device - Google Patents

Abstract

To provide a display device having wide angle of view.SOLUTION: A display device includes: a circuit board; a plurality of light-emitting elements mounted in matrix on a mounting surface 22 of the circuit board; a plurality of mask members extended along a row in one direction of the light-emitting elements, arranged in a direction perpendicular to the row in one direction, and blocking external light; and a film-shaped waterproof member 50 covering the mounting surface 22 of the circuit board and the light-emitting elements. The mask members are arranged in a circuit board. The film-shaped waterproof member 50 is held between the mounting surface 22 of the circuit board and the mask members. The mask member has a projection 45 extended in a direction parallel to the circuit board, arranged at a tip in a direction apart from the circuit board.SELECTED DRAWING: Figure 17

Description

  The present invention relates to a display device.

As a display device installed outdoors, a display device in which a plurality of light emitting diodes (LEDs) are mounted in a matrix on a circuit board is known.
In such a display device installed outdoors, a waterproof cover or the like is provided on the front surface (display surface) of the display device in order to prevent a short circuit of the wiring of the display device due to rainwater or the like.

  For example, in the display device described in Patent Literature 1, the front surface of the display device is waterproofed by a light shielding louver provided with a transparent cover disposed on the front surface of the LED element and a cover holding wall for holding the transparent cover.

JP 2007-17833 A

In the display device described in Patent Document 1, the cover holding wall of the light shielding louver holds the transparent cover disposed on the front surface of the LED element. For this reason, the height of the light shielding louver from the LED substrate is increased, and the emitted light from the LED element is blocked. When the light emitted from the LED element is blocked by the light blocking louver, the viewing angle of the display device is narrowed.
Moreover, in the display apparatus of patent document 1, since a plate-shaped transparent cover is arrange | positioned in the front surface of an LED element, a display apparatus becomes thick.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a display device having a wide viewing angle. Another object of the present invention is to provide a thin display device.

The display device according to the present invention includes a circuit board, a plurality of light emitting elements mounted in a matrix on the circuit board mounting surface, and extends along a line in one direction of the light emitting elements, and extends in a direction perpendicular to the line in one direction. A plurality of mask members arranged to block outside light, and a film-like waterproof member that covers the mounting surface of the circuit board and the plurality of light emitting elements are provided. The plurality of mask members are provided on the circuit board, and the film-like waterproof member is sandwiched between the mounting surface of the circuit board and the mask member. The mask member has a protrusion that extends in a direction parallel to the circuit board at the tip in a direction away from the circuit board.
Another display device of the present invention has a circuit board, a plurality of light emitting elements mounted in a matrix on the mounting surface of the circuit board, and a plurality of openings formed at positions where the light emitting elements are mounted, A mask plate that blocks outside light, a plurality of mask members that extend along a row in one direction of the light emitting elements, are arranged in a direction perpendicular to the row in one direction, and are arranged on the mask plate to block outside light, and a circuit A film-like waterproof member that covers the mounting surface of the substrate and the plurality of light-emitting elements is provided. The mask board is provided on the circuit board, and the film-like waterproof member is sandwiched between the mounting surface of the circuit board and the mask board. The mask member has a protrusion that extends in a direction parallel to the circuit board at the tip in a direction away from the circuit board.

According to the present invention, since the film-like waterproof member covers the mounting surface of the circuit board and the light emitting element, the mask member does not need to hold the waterproof member, and the height of the mask member from the mounting surface of the circuit board is increased. Can be lowered. Since the height of the mask member from the mounting surface of the circuit board can be reduced, a wide viewing angle can be obtained.
In addition, since the mounting surface of the circuit board and the light emitting element are covered with a film-like waterproof member, the display device can be thinned.

It is a front view of the display apparatus which concerns on Embodiment 1 of this invention. It is sectional drawing which looked at the display apparatus shown in FIG. 1 by the AA line. It is a figure which shows the mask member which concerns on Embodiment 1 of this invention. It is a schematic diagram which shows the relationship between the height of the main-body part of the mask member which concerns on Embodiment 1 of this invention, and the emitted light from a light emitting element. It is sectional drawing of the display apparatus which concerns on Embodiment 2 of this invention. It is a front view of the display apparatus which concerns on Embodiment 3 of this invention. It is sectional drawing which looked at the display apparatus shown in FIG. 6 by the BB line. It is sectional drawing of the display apparatus which concerns on Embodiment 4 of this invention. It is a front view of the display apparatus which concerns on Embodiment 5 of this invention. It is sectional drawing which looked at the display apparatus shown in FIG. 9 by the CC line. It is a front view of the display apparatus which concerns on Embodiment 6 of this invention. It is sectional drawing which looked at the display apparatus shown in FIG. 11 by the DD line. It is a figure which shows the mask board which concerns on Embodiment 6 of this invention. It is a front view of the display apparatus which concerns on Embodiment 7 of this invention. It is sectional drawing which looked at the display apparatus shown in FIG. 14 at the EE line. It is sectional drawing of the display apparatus which concerns on Embodiment 8 of this invention. It is a schematic diagram which shows the relationship between the height of the main-body part of a mask member in case a mask member has a protrusion part, and the emitted light from a light emitting element. It is a front view of the display apparatus which combined the display apparatus which concerns on Embodiment 3 of this invention.

  Hereinafter, display devices according to embodiments of the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
With reference to FIGS. 1-4, the display apparatus 10 which concerns on Embodiment 1 of this invention is demonstrated. For easy understanding, it is assumed that the display device 10 is outdoors and the front surface (display surface) of the display device 10 is installed perpendicular to the ground, and the direction parallel to the ground and the front surface of the display device 10 is assumed. Is the X-axis direction (the width direction of the display device 10), the direction perpendicular to the ground is the Y-axis direction (the height direction of the display device 10), and the direction perpendicular to the X-axis direction and the Y-axis direction is the Z-axis direction. It will be described as (the thickness direction of the display device 10). The same applies to other embodiments.

  As shown in FIGS. 1 and 2, the display device 10 includes a circuit board 20, a plurality of light emitting elements 30 mounted in a matrix on the mounting surface 22 of the circuit board 20, and a plurality of mask members 40 that block outside light. The film-like waterproof member 50 is provided. The display device 10 is installed on a stadium, a wall surface of a building, and the like.

  The circuit board 20 is made of an insulating resin material or the like. The circuit board 20 includes wiring (not shown) for supplying power to the light emitting element 30. The circuit board 20 is provided with a driving IC (IC: Integrated Circuit) (not shown) that drives the light emitting element 30 via the wiring of the circuit board 20.

The light emitting element 30 is composed of a surface mount type light emitting diode, and is arranged in a matrix on the mounting surface 22 of the circuit board 20. The light emitting element 30 has a light emitting surface 32 that emits light on a flat upper surface 31. Note that a surface disposed on the front side of the display device 10 is an upper surface, and a surface perpendicular to the mounting surface 22 of the circuit board 20 is a side surface.
The light emitting element 30 includes three light emitting chips each emitting red light, green light, and blue light (3 in 1 type). The light emission intensities of the three light emitting chips are independently adjusted by the power supplied from the driving IC of the circuit board 20 to the light emitting chips via the wiring of the circuit board 20. Thereby, light of an arbitrary color is emitted from the light emitting element 30 with an arbitrary intensity. As a result, a color image or the like is displayed on the display device 10 by the plurality of light emitting elements 30 as a whole.
The light emitting element 30 is provided with six electrodes 33 on the side surface 34 of the light emitting element 30, two for each light emitting chip, in order to supply power to each of the light emitting chips.
The light emitting elements 30 are mounted on the mounting surface 22 of the circuit board 20 in a matrix of 4 rows × 5 columns (5 in the X-axis direction and 4 in the Y-axis direction). The electrode 33 of the light emitting element 30 is directly connected to the wiring of the circuit board 20 by solder or the like and is electrically connected.

The mask member 40 is a black plate extending in the X-axis direction and is arranged in the Y-axis direction. The mask member 40 blocks outside light (for example, sunlight) and improves contrast of an image displayed by the display device 10. Here, blocking outside light means preventing outside light from entering the light emitting element 30 and the circuit board 20. For example, the mask member 40 absorbs external light.
The mask member 40 is produced from, for example, a black resin by injection molding.
As shown in FIG. 3, the mask member 40 includes a main body portion 41 and leg portions 42. The length L1 (the length in the X-axis direction) of the mask member 40 is longer than the length L2 in the X-axis direction of the circuit board 20, and the distance between the leg portions 42 of the mask member 40 (the leg portions 42 and 42). Of the circuit board 20 is substantially the same as the length L2 of the circuit board 20 in the X-axis direction. Although the width of the mask member 40 (the length in the Y-axis direction) is arbitrary, it is preferably smaller than the width of the light emitting element 30 (the length in the Y-axis direction) from the viewpoint of easy viewing of the display device 10. The height H1 of the leg portion 42 of the mask member 40 is substantially the same as the sum of the thickness of the circuit board 20 and the thickness of a film-like waterproof member 50 described later.
In the mask member 40, for example, the main body portion 41 of the mask member 40 is disposed on the film-like waterproof member 50, and the leg portions 42 of the mask member 40 sandwich the circuit board 20 at both ends in the X-axis direction of the circuit board 20, The circuit board 20 is bonded to the side surface and fixed to the circuit board 20.

The film-like waterproof member 50 is made of a transparent resin such as a polyester resin, a polycarbonate resin, or an acrylic resin and having weather resistance. Moreover, the film-like waterproof member 50 is soft and flexible. The thickness D1 of the film-like waterproof member 50 is, for example, 5 μm to 500 μm.
The film-shaped waterproofing member 50 covers the mounting surface 22 of the circuit board 20 and the light emitting element 30 mounted on the mounting surface 22 of the circuit board 20, and between the mounting surface 22 of the circuit board 20 (mounting of the circuit board 20). The surface 22 and the mounted light emitting element 30) are sealed. Further, the film-like waterproof member 50 is sandwiched between the mounting surface 22 of the circuit board 20 and the main body 41 of the mask member 40.

  Since the film-like waterproof member 50 seals the mounting surface 22 of the circuit board 20 and the mounted light emitting element 30, the display device 10 can be waterproofed. Furthermore, the thickness D1 of the film-like waterproof member 50 is thin (for example, 5 μm to 500 μm), and the main body 41 of the mask member 40 is fixed at a position between the mounting surface 22 of the circuit board 20 and the film-like waterproof member 50. . For this reason, the height from the mounting surface 22 of the circuit board 20 of the main body 41 of the mask member 40 is reduced, and the viewing angle of the display device 10 can be widened. The height of the main body 41 of the mask member 40 from the mounting surface 22 of the circuit board 20 will be described later.

Next, a method for manufacturing the display device 10 having the above configuration will be described.
First, the circuit board 20 provided with wiring is prepared.
Each light emitting element 30 is mounted on the mounting surface 22 of the prepared circuit board 20 by soldering the electrode 33 of the light emitting element 30 to the wiring of the circuit board 20 by a reflow method or the like.
Next, an adhesive is applied to surround the light emitting element 30 mounted on the periphery of the mounting surface 22, and the film-like waterproof member 50 is attached to the mounting surface 22 of the circuit board 20. Thereby, the mounting surface 22 of the circuit board 20 and the mounted light emitting element 30 are sealed by the film-like waterproof member 50.
Finally, the main body portion 41 of each mask member 40 is disposed on the film-like waterproof member 50, and the leg portions 42 of the mask member 40 are bonded to the circuit board 20 to fix the mask member 40 to the circuit board 20.
As described above, the display device 10 can be manufactured.

  With reference to FIG. 4, the relationship between the height from the mounting surface 22 of the circuit board 20 of the main body portion 41 of the mask member 40 in the display device 10 and the emitted light from the light emitting element 30 will be described. In FIG. 4, for ease of understanding, the film-like waterproof member 50 other than the film-like waterproof member 50 between the mounting surface 22 of the circuit board 20 and the main body portion 41 of the mask member 40 is omitted. doing.

  Here, the distance (distance in the X-axis direction) from the position P1 closest to the main body 41 of the mask member 40 of the light emitting surface 32 of the light emitting element 30 to the main body 41 of the mask member 40 is L3, and the circuit of the light emitting element 30. The height (the length in the Z-axis direction) from the mounting surface 22 of the substrate 20 is H2, and the height (the length in the Z-axis direction) of the main body 41 of the mask member 40 is H3. In addition, an angle (outgoing angle) formed by a line perpendicular to the light emitting surface 32 (upper surface 31) of the light emitting element 30 and the outgoing light 35 of the light emitting element 30 is defined as θ. Note that D1 is the thickness of the film-like waterproof member 50.

In a display device installed outdoors or the like, a viewing angle of 140 ° or more is generally required for the display device because of the positional relationship between the display device and an observer. Therefore, it is desirable that the outgoing light 35 having an outgoing angle θ = 70 ° or more out of the outgoing light 35 of the light emitting element 30 is emitted from the display device 10. That is, the height H4 of the main body 41 of the mask member 40 from the mounting surface 22 of the circuit board 20 (the sum of the height H3 of the main body 41 of the mask member 40 and the thickness D1 of the film-like waterproof member 50) is It is desirable that the height of the light emitting element 30 be equal to or lower than the height at which the outgoing light with the outgoing angle θ = 70 ° is blocked. When the relationship between the distance L3 and the height H4 is expressed by an equation, it is desirable that H4 = H3 + D1 ≦ L3 × tan (20 °) + H2.
On the other hand, the height H4 of the main body 41 of the mask member 40 from the mounting surface 22 of the circuit board 20 is a height from the mounting surface 22 of the circuit board 20 of the light emitting element 30 for the original purpose of blocking external light. It is desirable that the height is higher than H2 (H4 = H3 + D1> H2).
Accordingly, the height H4 of the main body 41 of the mask member 40 from the mounting surface 22 of the circuit board 20 is preferably H2 <H4 ≦ L3 × tan (20 °) + H2.

As described above, the film-like waterproof member 50 covers and seals the mounting surface 22 of the circuit board 20 and the light emitting element 30, so that the display device 10 can be waterproofed. In addition, since the height H4 of the main body 41 of the mask member 40 from the mounting surface 22 of the circuit board 20 can be reduced, the viewing angle of the display device 10 can be widened. A viewing angle of 140 ° or more can be realized by setting the height H4 to H2 <H4 ≦ L3 × tan (20 °) + H2.
Furthermore, since it is not necessary to provide a plate-shaped waterproof cover or the like on the front surface of the display device 10, the thickness of the display device 10 can be reduced.

Embodiment 2. FIG.
In the first embodiment, as the light emitting element 30, a surface mount type light emitting diode having a flat light emitting surface 32 (upper surface 31) and having an electrode 33 on the side surface 34 is used, but the shape of the light emitting surface 32 of the light emitting element 30 is used. The arrangement of the electrodes 33 of the light emitting element 30 is not limited to these, and the light emitting element 30 having an arbitrary configuration can be used.

  As shown in FIG. 5, this embodiment is different from Embodiment 1 of the present invention in that a bullet-type light emitting diode is used as the light emitting element 30. Other configurations are the same as those of the first embodiment.

  Since the tip portion of the light emitting element 30 in the display device 11 has a dome shape, the film-like waterproof member 50 easily follows the shape of the light emitting surface 32 of the light emitting element 30 as shown in FIG. The member 50 is in close contact with the light emitting surface 32 of the light emitting element 30.

  When the film-like waterproof member 50 is in close contact with the light emitting surface 32 of the light-emitting element 30, the surface reflection of the emitted light 35 of the light-emitting element 30 on the film-like waterproof member 50 is reduced, and the display device 11 displays a bright image. it can. Moreover, the display apparatus 11 can widen the viewing angle of the display apparatus 11 and can reduce thickness while waterproofing the display apparatus 11 similarly to the display apparatus 10 which concerns on Embodiment 1. FIG.

Embodiment 3 FIG.
In the first and second embodiments, one film-like waterproof member 50 covers the entire mounting surface 22 of the circuit board 20 and the mounted light-emitting element 30, but the film-like waterproof member 50 is used as the circuit board. The aspect which covers 20 mounting surfaces 22 and the mounted light emitting element 30 is not restricted to this.

  In the present embodiment, as shown in FIGS. 6 and 7, a plurality of film-like waterproof members 50 cover the light emitting elements 30 mounted on the mounting surface 22 of the circuit board 20 line by line and seal them. The configurations of the circuit board 20 and the light emitting element 30 are the same as those in the first embodiment.

  Specifically, the display device 12 includes the same number (four) of film-like waterproof members 50a to 50d as the number of rows of the light emitting elements 30 mounted in a matrix of 4 rows × 5 columns. The film-like waterproof members 50 a to 50 d cover the light emitting elements 30 one by one along the upper surface 31 and the side surface 34 of the light emitting element 30, and are in close contact with the upper surface 31 and the side surface 34 of the light emitting element 30.

A method for manufacturing the display device 12 having the above structure will be described.
First, as in the first embodiment, a circuit board 20 having wiring is prepared, and each light emitting element 30 is mounted on the mounting surface 22 of the circuit board 20.
An adhesive is applied around the light emitting elements 30 between the peripheral portion of the mounting surface 22 of the circuit board 20 and each row of the light emitting elements 30. Next, the circuit board 20 coated with the adhesive and the film-like waterproof members 50a to 50d are placed in a vacuum vessel, and the inside of the vacuum vessel is deaerated and decompressed.
The film-like waterproof members 50 a to 50 d are attached to the mounting surface 22 of the circuit board 20 along the upper surface 31 and the side surface 34 of the light emitting element 30 in the decompressed vacuum container. Thereby, the mounting surface 22 of the circuit board 20 and the mounted light emitting element 30 are sealed by the film-like waterproof members 50a to 50d.
The inside of the vacuum vessel is returned to normal pressure, and the circuit board 20 to which the film-like waterproof members 50a to 50d are attached is taken out from the vacuum vessel. Finally, as in the first embodiment, the mask member 40 is fixed to the circuit board 20 to which the film-like waterproof members 50a to 50d are attached.
Since the film-like waterproof members 50a to 50d are affixed to the mounting surface 22 of the circuit board 20 in a decompressed vacuum container, when the circuit board 20 is taken out from the vacuum container, the film-like waterproof members 50a to 50d are large. It is pressed by the atmospheric pressure and is in close contact with the upper surface 31 and the side surface 34 of the light emitting element 30.
As described above, the display device 12 can be manufactured.

  By covering the light emitting elements 30 on which the film-like waterproof members 50a to 50d are mounted one by one, the number of the light-emitting elements 30 covered by one film-like waterproof member 50 is reduced, and the film-like waterproof member 50 is attached. Attachment (production of the display device 12) is facilitated. Further, the display device 12 can display a bright image in the same manner as the display device 11 according to the second embodiment. Furthermore, the viewing angle of the display device 12 can be widened while waterproofing the display device 12, and the thickness of the display device 12 can be reduced.

Embodiment 4 FIG.
In the first to third embodiments, the main body portion 41 of the mask member 40 is disposed on the film-like waterproof members 50 and 50a to 50d. However, the arrangement of the main body portion 41 of the mask member 40 is not limited thereto, and the mask member 40 is not limited thereto. May be any arrangement that blocks external light and reduces the height of the main body 41 of the mask member 40 from the mounting surface 22 of the circuit board 20.

  In this Embodiment, as shown in FIG. 8, the main-body part 41 of the mask member 40 is arrange | positioned above the film-like waterproof members 50a-50d. The configurations of the circuit board 20, the light emitting element 30, and the film-like waterproof members 50 a to 50 d are the same as those in the third embodiment.

  The height H1 of the leg portion 42 of the mask member 40 in the display device 13 is formed higher than the sum of the thickness of the circuit board 20 and the thickness of the film-like waterproof member 50. Accordingly, the main body 41 of the mask member 40 is disposed above the film-like waterproof members 50a to 50d, and a gap is generated between the main body 41 of the mask member 40 and the film-like waterproof members 50a to 50d.

Since a gap is generated between the main body portion 41 of the mask member 40 and the film-like waterproof members 50a to 50d, rainwater or the like does not accumulate in the main body portion 41 of the mask member 40, and the waterproofness is improved.
In addition, the display device 13 is easy to manufacture and can display a bright image, like the display device 12 according to the third embodiment. Further, the viewing angle of the display device 13 can be widened and the thickness can be reduced.

Embodiment 5. FIG.
In the first to fourth embodiments, the light emitting element 30 is disposed (mounted) on the mounting surface 22 of the circuit board 20, but other members can also be disposed on the mounting surface 22 of the circuit board 20.
In the present embodiment, as shown in FIGS. 9 and 10, the mask member 40 is disposed on the mounting surface 22 of the circuit board 20, and the film-like waterproof member 50 is mounted on the mounting surface 22 of the circuit board 20. The light emitting element 30 and the mask member 40 are covered and sealed. The configurations of the circuit board 20 and the light emitting element 30 are the same as those in the first embodiment.

The mask member 40 in the display device 14 does not include the leg portion 42. The length L4 of the mask member 40 is longer than the length L5 of the light emitting elements 30 in the X-axis direction and shorter than the length L2 of the circuit board 20 in the X-axis direction.
The mask members 40 are arranged in the Y-axis direction and are fixed to the mounting surface 22 of the circuit board 20 with an adhesive.

  The film-like waterproof member 50 covers and seals the entire mounting surface 22 of the circuit board 20, the light emitting element 30 mounted thereon, and the mask member 40 fixed to the mounting surface 22 of the circuit board 20. The film-shaped waterproof member 50 is in close contact with the mounting surface 22 of the circuit board 20, the upper surface 31 and the side surface 34 of the light emitting element 30, and the upper surface 43 and the side surface 44 of the mask member 40.

A method for manufacturing the display device 14 having the above configuration will be described.
First, as in the first embodiment, a circuit board 20 having wiring is prepared, and each light emitting element 30 is mounted on the mounting surface 22 of the circuit board 20.
Next, the mask member 40 is fixed to the mounting surface 22 of the circuit board 20 with an adhesive or the like.
Thereafter, an adhesive is applied to the periphery of the mounting surface 22 of the circuit board 20 so as to surround the light emitting element 30. The circuit board 20 to which the adhesive is applied and the film-like waterproof member 50 are placed in a vacuum container, and the inside of the vacuum container is deaerated and decompressed.
The film-shaped waterproof member 50 is attached to the mounting surface 22 of the circuit board 20 along the upper surface 31 and the side surface 34 of the light emitting element 30 and the upper surface 43 and the side surface 44 of the mask member 40 in the decompressed vacuum container. . As a result, the mounting surface 22 of the circuit board 20 and the mounted light emitting element 30 and the mask member 40 fixed thereto are sealed by the film-like waterproof member 50.
The inside of the vacuum vessel is returned to normal pressure, and the circuit board 20 with the film-like waterproof member 50 attached is taken out of the vacuum vessel.
Since the film-like waterproof member 50 is affixed to the mounting surface 22 of the circuit board 20 in a decompressed vacuum container, when the circuit board 20 is taken out from the vacuum container, the film-like waterproof member 50 is pressed by atmospheric pressure. In close contact with the mounting surface 22 of the circuit board 20, the upper surface 31 and the side surface 34 of the light emitting element 30, and the upper surface 43 and the side surface 44 of the mask member 40.

Since the mask member 40 is disposed on the mounting surface of the circuit board 20, the height H4 of the mask member 40 (main body portion 41) from the mounting surface 22 of the circuit board 20 can be easily reduced. Therefore, the viewing angle of the display device 10 can be easily widened.
Since the film-like waterproof member 50 covers the mask member 40 in addition to the mounting surface 22 and the light emitting element 30 of the circuit board 20, the waterproofness of the display device 14 is further improved. Further, since the film-like waterproof member 50 is in close contact with the upper surface 31 (light emitting surface 32) of the light emitting element 30, the display device 14 can display a bright image. Further, the thickness of the display device 14 can be reduced.
Also in the present embodiment, a plurality of film-like waterproof members 50a to 50d are used as the film-like waterproof member 50, and each of the film-like waterproof members 50a to 50d is connected to the mounting surface 22 of the circuit board 20. The mounted light emitting element 30 and the fixed mask member 40 can be covered and sealed.

Embodiment 6 FIG.
In the first to fifth embodiments, the display devices 10 to 14 include the mask member 40 that blocks external light, but may include other members that block external light.
As shown in FIGS. 11 and 12, the display device 15 includes a mask plate 46 that blocks outside light, and each mask member 40 is disposed on the mask plate 46. The mask plate 46 is disposed on the film-like waterproof members 50a to 50d. The configurations of the circuit board 20, the light emitting element 30, and the film-like waterproof members 50 a to 50 d are the same as those in the third embodiment.

  As shown in FIG. 13, the mask plate 46 includes a main body portion 47 and leg portions 48. The length L6 of the mask plate 46 in the X-axis direction is longer than the length L2 of the circuit board 20 in the X-axis direction, and the distance between the leg portions 48 of the mask board 46 (the X-axis direction between the leg portions 48 and 48). Is substantially the same as the length L2 of the circuit board 20 in the X-axis direction. The length L7 of the mask plate 46 in the Y-axis direction is shorter than the length L8 of the circuit board 20 in the Y-axis direction. The height of the leg portion 48 of the mask plate 46 is substantially the same as the sum of the thickness of the circuit board 20 and the thickness of the film-like waterproof members 50a to 50d.

The main body 47 of the mask plate 46 has an opening 49 at a position where the light emitting element 30 is mounted on the mounting surface 22 of the circuit board 20. The opening 49 is formed in a rectangular shape. Further, the opening 49 is formed larger than the planar size of the light emitting element 30 in order to insert the corresponding light emitting element 30.
The mask plate 46 is produced from a black resin by injection molding, for example.

  The main body 47 of the mask plate 46 is disposed on the film-like waterproof members 50a to 50d in a state where each light emitting element 30 is inserted into the corresponding opening 49. Legs 48 of the mask plate 46 sandwich the circuit board 20 at both ends in the X-axis direction of the circuit board 20 and are bonded to the side surfaces of the circuit board 20 to be fixed to the circuit board 20.

  The mask member 40 in the display device 15 does not include the leg portion 42. Further, the length of the mask member (the length in the X-axis direction) is the same as the length L6 of the mask plate 46 in the X-axis direction. Each mask member 40 is disposed on a mask plate 46. The mask members 40 are arranged in the Y-axis direction and are fixed to the mask plate 46 with an adhesive.

  As in the third embodiment, the film-like waterproof members 50a to 50d cover the light emitting elements 30 one by one along the upper surface 31 and the side surface 34 of the light emitting element 30, respectively. 34. The film-like waterproof members 50 a to 50 d are sandwiched between the mounting surface 22 of the circuit board 20 and the main body 47 of the mask plate 46.

A method for manufacturing the display device 15 having the above configuration will be described.
Regarding the mounting of the light emitting element 30 on the mounting surface 22 of the circuit board 20, the attachment of the film-like waterproof members 50a to 50d to the mounting surface 22 of the circuit board 20, and the removal of the circuit board 20 from the vacuum container, The manufacturing method is similar to that in Embodiment Mode 3. Thereby, the mounting surface 22 of the circuit board 20 and the mounted light emitting element 30 are sealed by the film-like waterproof members 50a to 50d.
Next, each light emitting element 30 is inserted into the opening 49 of the corresponding mask plate 46, the main body portion 47 of the mask plate 46 is disposed on the film-like waterproof members 50a to 50d, and the leg portions 48 of the mask plate 46 are disposed. Is bonded to the circuit board 20 to fix the mask plate 46 to the circuit board 20.
Finally, each mask member 40 is disposed on the mask plate 46, and the mask member 40 is bonded and fixed to the mask plate 46.
Since the film-like waterproof members 50a to 50d are affixed to the mounting surface 22 of the circuit board 20 in a decompressed vacuum container, when the circuit board 20 is taken out from the vacuum container, the film-like waterproof members 50a to 50d are large. Pressed by atmospheric pressure. Thereby, the film-like waterproof members 50a to 50d are in close contact with the upper surface 31 and the side surface 34 of the light emitting element 30, respectively.
As described above, the display device 15 can be manufactured. Note that the mask member 40 may be fixed to the mask plate 46 in advance, and the mask plate 46 may be fixed to the circuit board 20.

  Since the light emitting element 30 is inserted into the opening 49 of the mask plate 46 disposed on the film-like waterproof members 50a to 50d and the periphery of the light emitting element 30 is covered by the mask plate 46, the mounting surface 22 of the circuit board 20 and the like can be used. The reflection of external light is reduced, and the contrast of the image displayed on the display device 15 is improved. In addition, the display device 15 can display a bright image similarly to the display device 12 according to the third embodiment. Furthermore, the viewing angle of the display device 15 can be widened while the display device 15 is waterproofed, and the thickness of the display device 15 can be reduced.

Embodiment 7 FIG.
In Embodiment 6, although the mask board 46 is arrange | positioned at the film-shaped waterproofing members 50a-50d, arrangement | positioning of the mask board 46 is not restricted to this.

  In the display device 16, as shown in FIGS. 14 and 15, a mask plate 46 on which the mask member 40 is disposed is disposed on the mounting surface 22 of the circuit board 20. The film-like waterproof member 50 covers and seals the light emitting element 30, the mounting surface 22 of the circuit board 20, the mask member 40, and the mask plate 46. The configurations of the circuit board 20 and the light emitting element 30 are the same as those in the sixth embodiment.

The mask plate 46 in the display device 16 does not include the leg portion 48. Further, the length L9 in the X-axis direction and the length L10 in the Y-axis direction of the mask plate 46 are shorter than the length L2 in the X-axis direction and the length L8 in the Y-axis direction of the circuit board 20, respectively.
The mask plate 46 in the display device 16 has an opening 49 at a position where the light emitting element 30 is mounted on the mounting surface 22 of the circuit board 20 as in the sixth embodiment. The opening 49 is larger than the planar size of the light emitting element 30 and is formed in a rectangular shape.

  The mask plate 46 is disposed on the mounting surface 22 of the circuit board 20 in a state where each light emitting element 30 is inserted into the corresponding opening 49. The mask plate 46 is fixed to the mounting surface 22 of the circuit board 20 with an adhesive.

  The mask member 40 in the display device 16 does not include the leg portion 42 as in the sixth embodiment. The length of the mask member (the length in the X-axis direction) is the same as the length L9 of the mask plate 46 in the X-axis direction. The mask member 40 is disposed on the mask plate 46. The mask members 40 are arranged in the Y-axis direction and are fixed to the mask plate 46 with an adhesive.

  The film-like waterproof member 50 includes a mounting surface 22 of the circuit board 20, a light emitting element 30 mounted thereon, a mask plate 46 fixed to the mounting surface 22 of the circuit board 20, and a mask member 40 fixed to the mask plate 46. Cover and seal the whole. The film-like waterproof member 50 is in close contact with the upper surface 31 and the side surface 34 of the light emitting element 30, the upper surface 43 and the side surface 44 of the mask member 40, and the front surface of the mask plate 46.

A method for manufacturing the display device 16 having the above structure will be described.
First, as in the first embodiment, a circuit board 20 having wiring is prepared, and each light emitting element 30 is mounted on the mounting surface 22 of the circuit board 20.
Next, each light emitting element 30 is inserted into the opening 49 of the corresponding mask plate 46, and the mask plate 46 is disposed on the mounting surface 22 of the circuit board 20 and fixed with an adhesive. Further, each mask member 40 is disposed on the mask plate 46, and the mask member 40 is bonded and fixed to the mask plate 46.
Thereafter, an adhesive is applied to the periphery of the mounting surface 22 of the circuit board 20 so as to surround the mask plate 46. The circuit board 20 to which the adhesive is applied and the film-like waterproof member 50 are placed in a vacuum container, and the inside of the vacuum container is deaerated and decompressed.
The film-shaped waterproof member 50 is attached to the mounting surface 22 of the circuit board 20 along the upper surface 31 and the side surface 34 of the light emitting element 30 and the upper surface 43 and the side surface 44 of the mask member 40 in the decompressed vacuum container. . Thereby, the mounting surface 22 of the circuit board 20, the light emitting element 30 mounted thereon, the mask plate 46 fixed to the mounting surface 22 of the circuit board 20, and the mask member 40 fixed to the mask plate 46 are film-like waterproof. Sealed by member 50.
The inside of the vacuum vessel is returned to normal pressure, and the circuit board 20 with the film-like waterproof member 50 attached is taken out of the vacuum vessel.
Since the film-like waterproof member 50 is affixed to the mounting surface 22 of the circuit board 20 in a decompressed vacuum container, when the circuit board 20 is taken out from the vacuum container, the film-like waterproof member 50 is pressed by atmospheric pressure. The Thereby, the film-like waterproof member 50 is in close contact with the upper surface 31 and the side surface 34 of the light emitting element 30, the upper surface 43 and the side surface 44 of the mask member 40, and the front surface of the mask plate 46.
As described above, the display device 16 can be manufactured. Note that the mask member 40 may be fixed to the mask plate 46 in advance, and the mask plate 46 may be fixed to the circuit board 20.

Since the periphery of the light emitting element 30 is covered with the mask plate 46 and the film-like waterproof member 50 also covers the mask member 40 and the mask plate 46, the contrast of the image displayed on the display device 16 is improved, and the display device 16 is waterproof. Also improves.
Further, the display device 16 can display a bright image in the same manner as the display device 12 according to the third embodiment. Furthermore, the viewing angle of the display device 16 can be widened, and the thickness of the display device 16 can be reduced.

Embodiment 8 FIG.
In the first to seventh embodiments, the circuit board 20 and the film-like waterproof members 50 and 50a to 50d are used to seal the mounting surface 22 of the circuit board 20, the mounted light emitting element 30, and the like. This may cause a short circuit in the wiring. In the present embodiment, the circuit board 20 is different from the first to seventh embodiments in that the light emitting element 30 has a through hole 24 in a portion where the light emitting element 30 is mounted on the mounting surface 22 of the circuit board 20.

As shown in FIG. 16, the circuit board 20 of the display device 17 penetrates from the mounting surface 22 of the circuit board 20 to the surface 26 facing the mounting surface 22 of the circuit board 20 in the center of the region where the light emitting elements 30 are mounted. A through-hole 24 is formed.
Other configurations are the same as those of the third embodiment as an example. When the display device 17 is manufactured, the through hole 24 of the circuit board 20 is closed until the circuit board 20 to which the film-like waterproof members 50a to 50d are attached is taken out from the vacuum container.

  Since the water vapor that has passed through the film-like waterproof members 50a to 50d is released from the through hole 24 of the circuit board 20 to the opposite side of the front surface of the display device 17, dew condensation can be prevented while waterproofing the display device 17. The display device 17 can be easily manufactured in the same manner as the display device 12 according to the third embodiment. The display device 17 can display a bright image. Further, the viewing angle of the display device 17 can be widened and the thickness can be reduced.

  The through hole 24 of the circuit board 20 is not necessarily provided in a portion where the light emitting element 30 is mounted on the mounting surface 22 of the circuit board 20. The through hole 24 of the circuit board 20 may be provided in a region covered with the film-like waterproof members 50 a to 50 d on the mounting surface 22 of the circuit board 20.

  As mentioned above, although several embodiment of this invention was described, this invention is not limited to said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

For example, the light emitting element 30 is not limited to the 3 in 1 type. The outgoing light 35 of the light emitting element 30 may be monochromatic light. In the matrix arrangement of the light emitting elements 30, the light emitting elements 30 that emit red light, the light emitting elements 30 that emit green light, and the light emitting elements 30 that emit blue light may be repeatedly arranged in the column direction.
The light emitting element 30 is not limited to a surface mount type light emitting diode and a shell type light emitting diode, and may be a self light emitting type element that is arranged on the circuit board 20.

  The light emitting element 30 is not limited to the one provided with the electrode 33 on the side surface 34 of the light emitting element 30, and the shape of the electrode 33 is arbitrary. For example, in order to be connected and fixed to the wiring of the circuit board 20, a BGA (Ball Grid Array) type electrode in which ball-shaped electrodes are arranged on the back surface (surface facing the upper surface 31) of the light emitting element 30 is provided. But you can.

  The matrix-like arrangement of the light emitting elements 30 is not limited to one in which the pitch of each row (each column) is the same. For example, the matrix-like arrangement of the light emitting elements 30 may be an arrangement shifted by a half pitch for each row (one column).

  The surface of the mask member 40 is preferably subjected to texture processing or matte coating. When the mask member 40 is arranged on the film-like waterproof member 50 (for example, Embodiments 1 to 3), the main body 41 of the mask member 40 is fixed to the film-like waterproof member 50 with an adhesive or the like. May be.

  Moreover, the shape of the mask member 40 is arbitrary. For example, as shown in FIG. 17, a protrusion 45 extending in the Y-axis direction may be provided at the tip in the Z-axis direction to prevent rainwater. In this case, the emitted light 35 of the light emitting element 30 is blocked by the protrusion 45. Therefore, in consideration of the length L11 at which the protrusion 45 protrudes in the Y-axis direction, the height H4 of the main body 41 of the mask member 40 from the mounting surface 22 of the circuit board 20 is H2 <H4 ≦ (L3-L11 ) × tan (20 °) + H2.

The surface of the mask plate 46 is preferably subjected to texture processing or matte coating. The mask plate 46 may be formed integrally with the mask member 40, for example, by injection molding. As with the mask member 40 in the fourth embodiment, the mask plate 46 has, for example, a leg portion 48 of the mask plate 46 higher than the sum of the thickness of the circuit board 20 and the thickness of the film-like waterproof members 50 and 50a to 50d. By doing, you may arrange | position above the film-shaped waterproofing members 50 and 50a-50d.
When a mask member is disposed on the mask plate 46, the height H4 of the mask member 40 from the mounting surface 22 of the circuit board 20 also takes into account the thickness of the mask plate 46.

  Although the example which covers the light emitting element 30 with which the film-like waterproof member 50 was mounted, and the example in which the film-like waterproof members 50a to 50d cover the light-emitting elements 30 one by one have been shown, the film-like waterproof member 50 is mounted. The light emitting elements 30 may be covered by a plurality of rows of the light emitting elements 30, or the mounted light emitting elements 30 may be covered one by one. The film-like waterproof member 50 may be attached to the light emitting element 30 with an adhesive. Thereby, surface reflection of the emitted light 35 from the light emitting element 30 in the film-like waterproof member 50 is reduced, and a bright image can be displayed.

  Further, the height H4 of the main body 41 of the mask member 40 from the mounting surface 22 of the circuit board 20 is not limited to the above-described formula, and can be changed depending on the use environment or the like.

  Furthermore, a larger display device can be configured by combining a plurality of display devices 10 to 15. For example, as shown in FIG. 18, the display device 60 is configured by combining four display devices 12. For example, display devices 12 and 14 having different configurations may be combined.

  10, 11, 12, 13, 14, 15, 16, 17, 60 Display device, 20 Circuit board, 22 Mounting surface, 24 Through hole 26 Surface facing the mounting surface, 30 Light emitting element, 31, 43 Upper surface, 32 Light Emitting surface, 33 electrodes, 34, 44 side surface, 35 emitting light, 40 mask member, 41, 47 body portion, 42, 48 leg portion, 45 projecting portion, 46 mask plate, 49 opening portion, 50, 50a, 50b, 50c 50d Film-like waterproof member, L1, L2, L4, L5, L6, L7, L8, L9, L10, L11 length, L3 distance, H1, H2, H3, H4 height, D1 thickness, P1 position, θ Output angle

Claims (7)

A circuit board;
A plurality of light emitting elements mounted in a matrix on the mounting surface of the circuit board;
A plurality of mask members extending along one direction row of the light emitting elements, arranged in a direction perpendicular to the one direction row, and blocking external light;
A film-like waterproof member that covers the mounting surface of the circuit board and the plurality of light emitting elements,
The plurality of mask members are provided on the circuit board,
The film-like waterproof member is sandwiched between the mounting surface of the circuit board and the mask member,
The said mask member is a display apparatus which has the protrusion part extended in the direction parallel to the said circuit board in the front-end | tip of the direction away from the said circuit board. A circuit board;
A plurality of light emitting elements mounted in a matrix on the mounting surface of the circuit board;
A mask plate having a plurality of openings formed at a position where the light emitting element is mounted, and shielding external light;
A plurality of mask members extending along a row in one direction of the light emitting elements, arranged in a direction perpendicular to the row in the one direction, and arranged on the mask plate to block outside light;
A film-like waterproof member that covers the mounting surface of the circuit board and the plurality of light emitting elements,
The mask plate is provided on the circuit board;
The film-like waterproof member is sandwiched between the mounting surface of the circuit board and the mask plate,
The said mask member is a display apparatus which has the protrusion part extended in the direction parallel to the said circuit board in the front-end | tip of the direction away from the said circuit board.   The display device according to claim 1, wherein the film-shaped waterproof member seals a space between the mounting surface of the circuit board.   4. The display device according to claim 1, wherein the film-like waterproof member is in close contact with and covers the light emitting element along an upper surface and a side surface of the light emitting element.   5. The display device according to claim 1, wherein the plurality of light emitting elements mounted in a matrix on the mounting surface of the circuit board are arranged with a half-pitch shift for each row.   The display device according to claim 1, wherein the light emitting element is a surface mount type light emitting diode having a light emitting chip that emits light therein.   A display device comprising a combination of a plurality of display devices according to claim 1.

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