JPH08320657A - Display device and manufacturing method thereof - Google Patents

Abstract

(57) [Abstract] [Purpose] The temperature inside the LED display device during use is lowered to allow the device to display a high-contrast and long-life display and to continuously use the device. [Structure] A plurality of LEDs 12 are arranged in a matrix in an opening of a housing 15 of an LED display device 11. Each L
The ED 12 is individually connected to the printed wiring board 13 on which the drive circuit of the LED 12 is mounted. Printed wiring board 1
3 and the vicinity of the LED 12, through a waterproof resin layer that covers the surface of the printed wiring board 13 and the lead wires of the LED 12, a heat dissipation plate 16 formed of a substance having a high thermal conductivity is provided in a plurality of insertions arranged in a matrix. The LED 12 is installed through the hole. The heat emitted from the printed wiring board 13 and the LED 12 is transferred to the waterproof resin layer, the heat dissipation plate 16, and the light shielding plate 19, and is emitted from the light shielding plate 19 to the atmosphere. The heat dissipation plate 16 extends in the row direction for every two rows of insertion holes,
A drainage groove is formed in communication with the insertion hole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device suitable for use as an information display device installed outdoors such as on a road, and a manufacturing method thereof.

[0002]

2. Description of the Related Art An LED display device having a plurality of light emitting diodes (hereinafter abbreviated as "LED") arranged in a matrix, which is constructed as follows, is mainly intended to be used outdoors such as on a road. I am trying.

FIG. 9 is a sectional view for explaining a simplified structure of a conventional LED display device. The LED display device includes a plurality of LEDs 1 arranged in a matrix.
The LED 1 is individually connected to the wiring of the printed wiring board 2. Printed wiring board 2
Has a drive circuit for controlling lighting / non-lighting of the LED 1. A control signal for controlling lighting / non-lighting of the LED 1 and electric power for lighting the LED 1 are externally supplied to a drive circuit of the printed wiring board 2 by a cable or the like through an opening (not shown) provided in the housing 3. ing. The substrate that constitutes the printed wiring board 2 and on which the drive circuit and the wiring are mounted is realized by, for example, a resin material. The printed wiring board 2 is housed in a housing 3 whose one surface is open. LE mounted on the printed wiring board 2
The tip of D1 projects outside the housing 3 from the opening.

A light-shielding plate 4 is attached to the opening of the housing 3. The light-shielding plate 4 is provided to prevent sunlight from directly hitting the LED 1 and lowering the display contrast of the LED 1.
Eave-shaped members 4a that block the LEDs 1 from directly hitting the LEDs 1 are formed for each row in the horizontal direction of the LEDs 1 arranged in a matrix. The light shielding plate 4 is realized by a resin such as polycarbonate. Further, a waterproof resin such as silicon is used to prevent the rain from entering the inside of the housing 3 from the surface on which the LED 1 is arranged and the surface of the printed wiring board 2 and L.
The waterproof resin layer 5 is formed between the lower part of the ED 1 and the lower part.

The LED 1 has a characteristic that when it is turned on, it generates heat and its brightness decreases as the temperature rises. Further, the drive circuit of the printed wiring board 2 generates heat when the LED 1 is turned on. As described above, the heat generated when the LED 1 is turned on lowers the contrast of the display of the LED 1 and causes the life of the LED display device to be shortened. In order to prevent this, the housing 3 is provided with a cooling means (not shown) to cool the drive circuits of the LED 1 and the printed wiring board 2 which generate heat. As the cooling means, for example, an air cooling fan or the like is used.

[0006]

In order to extend the life of the LED display device, it is necessary to cool the drive circuits for the LED 1 and the printed wiring board 2. When a conventional cooling means such as an air-cooling fan is used, the LED 1 and the drive circuit are not sufficiently cooled because the internal air itself is heated only by stirring the air inside the housing 3 by the fan. Therefore, it is necessary to take in outside air from the outside of the LED display device. L having the above-mentioned configuration
Since the ED display device is mainly installed on a road or the like, when air is taken into the display device from the outside of the LED display device, it is considered that the taken-in air is contaminated by exhaust gas or the like. When the contaminated air is taken into the LED display device, the printed wiring board 2 and the LED 1 inside the housing 3 are polluted by the exhaust gas. When the printed wiring board 2 is polluted by exhaust gas, there is a possibility that the wiring and the drive circuit provided may be broken or short-circuited. When disconnection or short circuit occurs, lighting failure occurs in the LED 1 and the display contrast decreases. Further, the soot adheres to the LED 1 to reduce the display contrast.

In order to prevent the inside of the LED display device from being contaminated, in order to prevent the temperature rise of the LED without using the above-mentioned cooling means, it is necessary not to turn on the LED 1 continuously. In this case, the LED display device cannot be used continuously for a long time and cannot be effectively used as an information display device.

An object of the present invention is to lower the internal temperature when the display device is used, to provide a high contrast and a long display life,
It is an object of the present invention to provide a display device that can be continuously used and a manufacturing method thereof.

[0009]

The present invention has a plurality of light emitting elements and a plurality of insertion holes through which the light emitting elements are respectively inserted and arranged in a matrix, and which is made of a material having high thermal conductivity. The members and the terminals of the plurality of light emitting elements that are inserted through the insertion holes of the light shielding member so that the light emitting directions are the same direction are connected to a predetermined wiring, and are arranged on the side opposite to the light emitting direction side. And a printed wiring board having a plurality of insertion holes through which the light emitting elements are respectively inserted and arranged in a matrix, and between the light shielding member and the printed wiring board, and one surface of which is the light shielding member. A heat dissipation member made of a material having a high heat conductivity and disposed in contact with each other; and a resin layer made of a material having a high heat conductivity and filled between the heat dissipation member and the printed wiring board. It is a display device. Further, the heat dissipation member of the present invention is characterized in that it has a plurality of grooves arranged in parallel with each other on a surface of the heat dissipation member on the light shielding member side. Further, the groove of the present invention is characterized in that it is formed along a row direction of a plurality of insertion holes arranged in a matrix of the heat dissipation member. Further, the groove of the present invention is characterized in that one groove is formed along the row direction of the plurality of insertion holes arranged in a matrix of the heat dissipation member and corresponding to the two rows of insertion holes. And
Further, the width of the groove of the present invention is selected to be equal to or less than the length from the center of the insertion hole of the heat dissipation member to the center of the insertion hole adjacent to the insertion hole. The cross-sectional shape of the groove of the present invention orthogonal to the longitudinal direction is substantially U-shaped. Further, the plurality of grooves of the present invention are formed so as to communicate with a part of the insertion hole of the heat dissipation member. The light emitting device of the present invention is a light emitting diode. Further, the light shielding member and the heat radiating member of the present invention are made of aluminum, and the resin layer is made of silicon resin. Further, according to the present invention, light emitting elements are connected in a matrix in a predetermined wiring of a printed wiring board so that the light emitting directions are the same direction, and a plurality of insertion holes arranged in a matrix and the insertion holes. A heat-dissipating member having a plurality of grooves arranged in parallel with each other and communicating with a part of the light-emitting element, the heat-dissipating member having the groove-formed surface on the light emission direction side of the light-emitting element, and the insertion hole. The light emitting elements are respectively inserted into the resin, resin is poured from the groove of the heat dissipation member, and resin is filled between the heat dissipation member and the printed wiring board to form a resin layer. The light emitting element is inserted into each of the through holes of the light blocking member having the through hole, and the light blocking member and the heat radiating member are brought into contact with each other.

[0010]

According to the present invention, the terminals of the plurality of light emitting elements are connected to the predetermined wirings of the printed wiring board to arrange the light emitting elements on the matrix. The plurality of light emitting elements are inserted into the plurality of insertion holes provided in the heat dissipation member formed of a material having high thermal conductivity, and the heat dissipation member is arranged near the light emitting element and the printed wiring board. Further, a resin layer having a relatively high thermal conductivity is filled in a space between the heat dissipation member and the printed wiring board and a space between the heat dissipation member and the light emitting element to form a resin layer. Finally, the light emitting elements are respectively inserted through a plurality of insertion holes provided in the light shielding member formed of a material having a high thermal conductivity, and one surface of the light emitting element is brought into contact with the heat dissipation member. In this way, the display device is created.

As a result, the heat dissipation member comes into contact with the light emitting element and the printed wiring board through the resin layer, absorbs heat generated from the light emitting element and the printed wiring board through the resin layer, and transfers it to the light shielding member. To do. The light shielding member radiates the heat from the surface thereof to the outside air. Therefore, the heat inside the device can be efficiently discharged to the outside.

Further, according to the invention, the heat radiation member includes:
A plurality of grooves, which are arranged in parallel with each other, are formed on the surface of the light shielding member side. As a result, rainwater or the like adhering to the surface of the heat dissipation member can be efficiently discharged to the outside of the device.

Further, according to the invention, the grooves are formed along the row direction of the insertion holes of the heat dissipation member.

Further, according to the present invention, one groove is formed corresponding to the two rows of insertion holes along the row direction. As a result, rainwater or the like can be efficiently discharged to the outside while maintaining the strength of the heat dissipation member relatively.

Still further according to the invention, the width of the groove is selected to be equal to or less than the length between the centers of the insertion holes which are adjacent to each other in the row direction of the insertion holes.

Further, according to the invention, the cross-sectional shape of the groove perpendicular to the longitudinal direction is formed in a substantially U shape.

Further, according to the invention, the groove is formed so as to communicate with a part of the insertion hole provided in the heat dissipation member. This allows the resin layer to be easily formed by injecting the resin from the groove after disposing the heat dissipation member.

According to the invention, the light emitting element is realized by a light emitting diode. Further, the light shielding member and the heat radiating member are realized by aluminum, and the resin layer is realized by silicon resin. As a result, the device can be realized at low cost with an easily available material.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 (1) is an embodiment of the present invention, L
3 is a plan view of the ED display device 11. FIG. 1 (2) is shown in FIG.
It is a right view of the LED display device 11 of (1). Figure 2
FIG. 2 is a cross-sectional view taken along the line AA of the LED display device 11 of FIG. FIG. 3A is a plan view of the heat dissipation plate 16. FIG.
(2) is a BB sectional view of the heat dissipation plate 16 of FIG. 3 (1). FIG. 4 is a partial perspective view of the heat dissipation plate 16 of FIG.

The LED display device 11, which is a display device, has a structure in which LEDs 12, which are a plurality of light emitting elements, are arranged in a matrix. The LEDs 12 are arranged so that the light emitting directions thereof are the same, and the wiring of the printed wiring board 13 arranged on the opposite side to the light emitting direction side,
Each is connected via a lead wire 14. The printed wiring board 13 has a drive circuit for the LEDs 12 that controls lighting / non-lighting of each LED 12. LED12 is implement | achieved by the multicolor light emitting LED lamp which contained the LED lamp which has the light emission color of red and yellow green, for example. The substrate that constitutes the printed wiring board 13 and on which the wiring and the drive circuit are mounted is realized by, for example, a substrate made of epoxy resin filled with glass fiber.

The printed wiring board 13 and the LED 12
Are housed inside a housing 15 having an opening on one surface. On the side surface 15a of the housing 15, a step 15b is formed around the middle in the depth direction. The space between the pair of side surfaces 15a facing each other is formed such that the portion closer to the opening than the step 15b is larger than the width of the printed wiring board 13.
A portion of the housing 15 closer to the bottom surface 15c than the step 15b is formed smaller than the width of the printed wiring board 13. The printed wiring board 13 is fixed by abutting on a step 15b formed inside the side surface 15a of the housing 15. LED1
2 has a tip protruding from the opening of the housing 15. A space is formed between the surface of the printed wiring board 13 opposite to the surface to which the LED 12 is connected and the bottom surface 15c of the housing 15. In this space, circuit components such as a drive circuit included in the printed wiring board are arranged. The housing 15 is realized by, for example, polycarbonate.

In the space between the printed wiring board 13 and the lower portion of the LED 12, a heat dissipation plate 16 made of a material having a high thermal conductivity, for example, a metal such as aluminum is formed on the printed wiring board 13 side. The protruding portion 22 is arranged in contact with the area of the printed wiring board 13 where the wiring is not formed. As a result, the surface of the heat dissipation plate 16 on the side where the protruding portion 22 is formed is installed such that the area other than the protruding portion 22 is separated from the printed wiring board 13. The heat dissipation plate 16
Is the LED 12 and the printed wiring board 1 as described later.
3 absorbs heat generated from the driving circuit of FIG. Heat sink 16
A plurality of insertion holes 17 are formed in a matrix to penetrate the LEDs 12 arranged in a matrix. Further, a plurality of screw-through insertion holes 23 for fixing the heat dissipation plate 16 are formed in a region of the heat dissipation plate 16 where the insertion hole 17 is not formed.

Furthermore, the groove 1 is formed in the one surface 16a which is the surface opposite to the side where the protruding portion 22 of the heat dissipation plate 16 is formed.
A plurality of 8 are provided. The groove 18 is provided to drain rainwater or the like that has entered the vicinity of the LED 12 when the LED display device 11 is used outdoors, for example. Therefore, the LED display device 11 is installed and used so that the groove 18 is in the vertical direction. Further, the heat dissipation plate 16 is arranged such that the one surface 16a in which the groove 18 is formed is on the light emitting direction side of the LED 12.

The grooves 18 are arranged in the row direction of the insertion holes 17 of the heat dissipation member 16, that is, in the arrangement direction of the insertion holes 17 arranged in a matrix in FIG.
And it is formed between the two rows of insertion holes 17. The width d1 of the groove 18 is set to be slightly larger than the distance d2 between the edges of two adjacent insertion holes 17, for example. Thereby, the groove 18 communicates with the insertion hole 17. Also, the groove 18 is
For example, it may be formed for each of the two rows of insertion holes 17 or for each of the one row of insertion holes 17. As shown in FIG. 4, the groove 18 has a cross-sectional shape perpendicular to the longitudinal direction of the groove 18 of approximately U.
It is formed in a letter shape. The cross-sectional shape may be V-shaped, for example.

Referring to FIG. 1, a light shielding plate 19 is arranged at the opening of the housing 15. The shading plate 19 is the heat dissipation plate 16
Is in contact with a part of the one surface 16a of the
It also has a role as a heat dissipation plate that dissipates the heat absorbed by the heat dissipation plate 16 into the outside air. The surface of the light shielding plate 19 is painted in a color, for example, black, which has a high contrast when the LED 12 is turned on and makes the displayed contents of the display screen easy to understand. The light shield plate 19 is also made of a material having a high thermal conductivity like the heat dissipation plate 16, for example, a metal such as aluminum.

The light shielding plate 19 has an eaves-shaped member 19a for each horizontal step of the LEDs 12 arranged in a matrix. In order to prevent the light shielding plate 19 from directly hitting the LED 12 and being reflected by the reflector in the LED 12, the display contrast of the display screen of the device 11 is not lowered, and the sunlight is directly applied to the LED 12. The sun is blocked so that there is no light.

Resin is filled in the gaps between the printed wiring board 13 and the heat dissipation plate 16 inside the housing 15, between the printed wiring board 13 and the LEDs 12, and between the side surfaces 15a of the housing 15 and the LEDs 12. A waterproof resin layer 21 is formed. The resin is filled so as to cover a part of the LED 12, the surface of the printed wiring board 13, the lead wire 14 connecting the printed wiring board 13 and the LED 12, and the like. The waterproof resin layer 21 is realized by a resin having excellent water resistance and a thermal conductivity higher than that of air, such as silicon.

FIG. 5 shows the LED display device 11 of FIG.
FIG. Referring to FIG. 5, the LED of the present invention
A method of manufacturing the display device 11 will be described.

The lead wires 14 of the plurality of LEDs 12 are respectively connected to predetermined wirings of the printed wiring board 13,
The LEDs 12 are arranged in a matrix at a distance d3 from the printed wiring board 13. Printed wiring board 13
Has a drive circuit for the LED 12 not shown, and the drive circuit is connected to the wiring. The printed wiring board 13 to which the LED 12 is attached is inserted into the housing 15 through the opening of the housing 15, and the end portion of the wiring board 13 is attached to the side surface 1 of the housing 15.
It is fixed at a position where it abuts on the step 15b of 5a. The printed wiring board 13 is mounted on the housing 15 in such a manner that a space is formed between the surface opposite to the surface on which the LED 12 is mounted and the bottom surface 15c of the housing 15.

Next, the LED is inserted in the insertion hole 17 of the heat dissipation plate 16.
The heat radiation plate 16 is arranged in the vicinity of the printed wiring board 13 and the LED 12 by penetrating each of them. The printed wiring board 13 and the heat sink 16 are the printed wiring board 1 of the heat sink 16.
The protrusion 22 and the printed wiring board 13 provided on the surface on the 3 side
Are arranged in contact with only the area where the wiring is not formed. Thereby, the heat sink 16 and the printed wiring board 13
Means that in the area where the wiring of the printed wiring board 13 is formed, the printed wiring board 13 is arranged with a gap, so that the printed wiring board 1
The electrical insulation of the wiring of 3 can be maintained. Heat sink 16
Is fixed to the housing 15 by inserting a bolt into the insertion hole 23 for screwing from the bottom surface 15c of the housing 15 and screwing it with a nut.

Subsequently, a resin 27 having excellent water resistance is injected from the groove 18 of the heat dissipation plate 16. FIG. 6 is a partial side view showing the state of injecting the resin 27. Resin 27 is the nozzle 2
6 is injected along the groove 18 of the heat sink 16. Groove 18
The width d1 is a little wider than the interval d2 between the edge portions of two adjacent insertion holes 17, and is formed so as to communicate with a part of the insertion hole 17 of the heat dissipation plate 16. The resin 27 is filled from the groove 18 of the heat dissipation plate 16 through the insertion hole 17 into the gap between the heat dissipation plate 16 and the printed wiring board 13. And the resin 27 is
The periphery of the lead wire 14 that connects the LED 12 and the printed wiring board 13, that is, the insertion hole 17 of the heat dissipation plate 16 is also filled. In addition, the space between the side surface 15 a of the housing 15 and the LED 12 is also filled. By providing the heat dissipation plate 16 with the groove 18 communicating with the insertion hole 17, the resin 27 can be easily filled.

Finally, the light shielding plate 19 is placed in the opening of the housing 15. The tip of the LED 12 protruding from the opening is inserted into the insertion hole 20 of the light shielding plate 19, and the light shielding plate 1
9 is fixed to the heat sink 16 by screwing. Light shield 19
2 is fixed so that a gap 24 for drainage connected to the groove 18 is formed between the housing 15 and the side surface 15a located below in FIG.

The LED display device 11 is completed by the above procedure.

FIG. 7A is a plan view of the heat dissipation plate 31 of the LED display device according to another embodiment of the present invention. Figure 7
7B is a sectional view taken along line CC of the heat dissipation plate 31 of FIG. 7A. FIG. 8 is a partial perspective view of the heat dissipation plate 31 of FIG. 7 (1). The heat dissipation plate 31 of this embodiment has a configuration similar to that of the heat dissipation plate 16 of FIG.

The heat dissipation plate 31 of this embodiment has a wider drainage groove 32 than the heat dissipation plate 16 shown in FIG. The drainage groove 32 has a larger drainage capacity for water or the like when formed wider, and is effective when the LED display device is used outdoors, for example, as a road information display device. On the contrary, if the groove 32 is made too wide, the efficiency of heat transfer when transferring the heat absorbed by the heat dissipation plate 31 to the light shielding plate 19 becomes poor. The width d4, which is the maximum width of the groove 32, is preferably a distance d5 from the center of the insertion hole 17 of the heat dissipation plate 16 to the center of the adjacent insertion hole 17, for example.

The results of a drive test in which the LED display device 11 of this embodiment and the LED display device of the prior art which does not have the heat sink 16 are driven and compared with each other will be described. The size of the LED display device used in this test is 160
It is mm × 160 mm. There are 256 LEDs used. The light shielding plate 19 and the heat dissipation plate 16 are realized by aluminum. Further, it is assumed that the LED display device 11 of the present embodiment and the LED display device of the prior art have an ambient temperature of 25 ° C. and are installed in a windless state. Under these conditions, the LED display device 11 of this example and the LED display device of the conventional technique were lighted for 30 minutes, and then the temperatures of the LED and the printed wiring board were measured.

As a result, the LED display device 11 of this embodiment is obtained.
Was able to reduce the temperature rise of the LED 12 and the printed wiring board 13 by about 10% as compared with the conventional LED display device. Furthermore, the decrease in the brightness of the LED 12 is about 1 in red as compared with the LED of the LED display device of the prior art.
It was possible to improve by 0%. Furthermore, the device 11
The display life of the display has been doubled as compared with the conventional LED display device. The display life of the LED display device is a period from the start of use to the time when the brightness of the LED decreases during continuous use of the device and the display of the device becomes invisible from a distance determined at the time of design. .

Further, the LED display device 11 of this embodiment is
The heat absorbed by the heat dissipation plate 16 is transmitted to the light shield plate 19 exposed to the outside of the display device 11 and is released into the outside air from the light shield plate 19, so that the environment where the light shield plate 19 is constantly cooled, for example, When used in the windy environment such as outdoors, the cooling efficiency inside the LED display device 11 can be further enhanced.

In this embodiment, in order to facilitate the injection of the resin 27 for forming the waterproof resin layer 21, the groove 18 of the heat dissipation plate 16 and the insertion hole 17 are formed so as to communicate with each other. Even when the groove 18 and the insertion hole 17 are formed so as not to communicate with each other, the groove 18 can be effectively used for draining rainwater and the like.

It is also possible to use an element other than the light emitting diode as the light emitting element.

[0041]

As described above, according to the present invention, in a display device, a plurality of light emitting elements are arranged in a matrix, and each light emitting element is turned on or off. Display. The light emitting element and the printed wiring board are in contact with a heat dissipation member formed of a material having a high heat conductivity via a resin layer made of a material having a high heat conductivity, and the heat dissipation member is connected to the light emitting element and the printed wiring board. It absorbs the heat released from the plate. The absorbed heat is propagated from the heat dissipation member to the light shielding member formed of a material having high thermal conductivity,
It is released into the outside air from the light shielding member. This can prevent the temperature rise of the light emitting element and the printed wiring board. Therefore, the display life of the display device is extended and the durability is improved. In addition, it is possible to prevent a decrease in the brightness of the light emitting element and perform a good display with high contrast. Further, the light emitting element can be continuously turned on.

Further, according to the present invention, a groove is provided on the surface of the heat dissipation member on the side of the light shielding member. As a result, water or the like adhering to the heat dissipation member or the like can be efficiently discharged, and corrosion inside the device can be prevented.

The grooves are formed along the row direction of the plurality of insertion holes of the heat dissipation member. Further, the groove is formed along the row direction, and one groove is formed corresponding to the two rows of insertion holes. The width of the groove is selected to be equal to or less than the length between the centers of the insertion holes adjacent to each other in the row direction of the insertion holes of the heat dissipation member. by this. The adhered water can be efficiently discharged while keeping the strength of the heat dissipation member high. Further, the cross-sectional shape of the groove perpendicular to the longitudinal direction is formed in a substantially U shape.

Further, according to the present invention, the groove is formed so as to communicate with a part of the insertion hole of the heat dissipation member. Therefore, in the display device manufacturing method of the present invention, it can be easily formed by injecting the resin layer from the groove.

According to the invention, the device uses a light emitting diode as a light emitting element. The heat dissipation member and the light shielding member are made of aluminum, and the resin layer is made of silicon resin. As a result, each member is formed of a material that is easily available, which facilitates manufacturing. Also, it can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a plan view and a side view of an LED display device 11 that is an embodiment of the present invention.

2 is a cross-sectional view taken along the line AA of the LED display device 11 of FIG.

3A and 3B are a plan view and a BB sectional view of a heat dissipation plate 16 used in the LED display device 11 of FIG.

FIG. 4 is a partial perspective view of the heat dissipation plate 16 of FIG.

5 is an exploded sectional view of the LED display device 11 of FIG.

FIG. 6 is a partial side view for explaining a state of injecting a resin 27.

7A and 7B are a plan view and a CC sectional view of a heat dissipation plate 31 used in an LED display device according to another embodiment of the present invention.

8 is a partial perspective view of the heat dissipation plate 31 of FIG.

FIG. 9 is a cross-sectional view of a conventional LED display device.

[Explanation of symbols]

 11 LED Display Device 12 LED 13 Printed Wiring Board 14 Lead Wire 15 Housing 16,31 Heat Dissipating Plate 18,32 Groove 19 Light-Shielding Plate

 ─────────────────────────────────────────────────── ─── Continuation of front page (71) Applicant 593065534 Dorsis Co., Ltd. 4-10-4 Hatchobori, Chuo-ku, Tokyo (72) Inventor Kazuhisa Murata 22-22 Nagaike-cho, Abeno-ku, Osaka, Osaka Prefecture (72) Inventor Hiroshi Onodera 29-1, Mita-cho, Miwa-cho, Kaifu-gun, Aichi Prefecture Mita Factory, Nagoya Electric Industrial Co., Ltd. In-house (72) Inventor Mitsuru Sakai 100 Maeda-cho, Totsuka-ku, Yokohama-shi, Kanagawa Koito Kogyo Co., Ltd. (72) Inventor Takehisa Seki 4-10-4 Hatchobori, Chuo-ku, Tokyo Within Dorsys Inc.

Claims (10)

[Claims] 1. A plurality of light emitting elements, a light blocking member which has a plurality of through holes through which the light emitting elements are respectively inserted and is arranged in a matrix, and which is made of a material having a high thermal conductivity, and through which the light blocking member is inserted. A printed wiring board, in which terminals of the plurality of light emitting elements that are inserted in the holes so that the light emitting directions are the same direction are connected to a predetermined wiring, and the light emitting direction side is arranged on the opposite side, The light emitting elements are respectively inserted and have a plurality of insertion holes arranged in a matrix, and are arranged between the light shielding member and the printed wiring board, one surface of which is in contact with the light shielding member, and heat conduction is performed. A display device comprising: a heat dissipation member made of a material having a high thermal conductivity; and a resin layer made of a material having a high thermal conductivity, which is filled between the heat dissipation member and the printed wiring board. 2. The display device according to claim 1, wherein the heat dissipation member has a plurality of grooves arranged in parallel with each other on a surface of the heat dissipation member on the light shielding member side. 3. The display device according to claim 2, wherein the groove is formed along a row direction of a plurality of insertion holes arranged in a matrix of the heat dissipation member. 4. The groove is formed along a row direction of a plurality of insertion holes arranged in a matrix of the heat dissipation member, and
3. The display device according to claim 2, wherein one insertion groove is formed corresponding to each row insertion hole. 5. The display device according to claim 4, wherein the width of the groove is selected to be equal to or less than the length between the centers of the insertion holes adjacent to each other in the row direction of the insertion holes of the heat dissipation member. 6. The display device according to claim 2, wherein a cross-sectional shape of the groove orthogonal to the longitudinal direction is a substantially U shape. 7. The display device according to claim 2, wherein the plurality of grooves are formed in communication with a part of the insertion hole of the heat dissipation member. 8. The display device according to claim 1, wherein the light emitting element is a light emitting diode. 9. The display device according to claim 1, wherein the light shielding member and the heat radiating member are made of aluminum, and the resin layer is made of silicon resin. 10. A plurality of insertion holes arranged in a matrix, the light emitting elements being connected in a matrix in a predetermined wiring of a printed wiring board so that the light emitting directions are the same direction, and the insertion holes. A heat-dissipating member having a plurality of grooves arranged in parallel with each other and communicating with a part of the light-emitting element, the heat-dissipating member having a groove-formed surface on the light emission direction side of the light-emitting element; Each of the light emitting elements is inserted into a groove, and a resin having a high thermal conductivity is poured from a groove of the heat dissipation member, and a resin layer is formed by filling the resin between the heat dissipation member and the printed wiring board to form a matrix shape. A method of manufacturing a display device, comprising: inserting a light emitting element into each of the through holes of a light blocking member having a plurality of through holes arranged in the above, and fixing the light blocking member and the heat radiating member in contact with each other.