JP6541444B2 - Display device and display unit - Google Patents

Description

The present invention relates to a display apparatus and a display unit.

  The display device is configured by arranging light sources in a matrix. In this type of display device, when external light is incident on the outer peripheral portion of the light source in the display device, reflected light from the outer peripheral portion of the light source is generated. In this case, when the light source is on, the contrast between the light source and the outer peripheral portion of the light source is reduced, and the visibility of the display device is reduced. On the other hand, there has been proposed a display device including, for example, a plurality of light emitting diodes and a louver provided in the vicinity of the outer periphery of each light emitting diode (see Patent Document 1). In the display device described in Patent Document 1, the visibility of the light emitting diode is improved by the louver blocking external light entering the outer peripheral portion of the light emitting diode in the display device.

JP 2004-302218 A

  However, in the configuration described in Patent Document 1, since the louver is provided in the vicinity of the outer periphery of the light emitting diode, the light emitted from the light emitting diode is partially blocked by the louver and emitted from the light emitting diode The light is lost.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a display device capable of reducing the loss of light emitted from a light emitting unit.

In order to achieve the above object, a display device according to the present invention is
A plurality of light emitting units arranged in a matrix;
A substrate on which the plurality of light emitting units are mounted;
A reflection preventing portion provided on an outer peripheral portion of each of the plurality of light emitting portions on the main surface on the light emitting portion side of the substrate and preventing reflection of external light incident on the main surface of the substrate;
And a case for holding the substrate in a form in which the back surface side opposite to the main surface of the substrate is exposed to the internal space ,
The substrate has a through hole penetrating in the thickness direction of the substrate between two adjacent light emitting units,
The reflection preventing unit, the one-way side perpendicular to the optical axis of the plurality of light emitting portions of at least the light emitting portion, located outside the light distribution area where light emitted from the plurality of light emitting portions are light distribution A main surface covering portion covering the main surface, a back surface covering portion covering the back surface, and a coupling portion located inside the through hole and coupling the main surface covering portion and the back surface covering portion; And not covering at least a part of the back surface of the substrate .

  According to the present invention, the anti-reflection portion is located outside the light distribution area where the light emitted from the light emitting portion is distributed. Thus, the light emitted from the light emitting unit is not blocked by the anti-reflection unit at least on one side orthogonal to the optical axis of the light emitting unit, so that the loss of light emitted from the light emitting unit can be reduced.

FIG. 1 is a perspective view of a display device according to Embodiment 1. FIG. 2 is a cross-sectional view taken along line AA shown in FIG. 1 of the display device according to Embodiment 1. FIG. 7 is a cross-sectional view for illustrating the method for manufacturing the display device according to Embodiment 1. FIG. 6 is a perspective view of a display device according to Embodiment 2; FIG. 7 is a cross-sectional view of the display device according to Embodiment 2 taken along the line B-B shown in FIG. 4; FIG. 14 is a cross-sectional view for illustrating the method for manufacturing the display device according to Embodiment 2. FIG. 18 is a perspective view of a display device in accordance with a third embodiment. It is a cross-sectional arrow line view in the CC line shown in FIG. 7 of the display apparatus which concerns on Embodiment 3. FIG. FIG. 20 is a cross-sectional view of a display device in accordance with Embodiment 4; FIG. 21 is a cross-sectional view for illustrating the method for manufacturing a display device according to Fourth Embodiment. FIG. 21 is a perspective view of a display device in accordance with Embodiment 5; FIG. 18 is a cross-sectional view taken along line DD shown in FIG. 11 of the display device in accordance with the fifth embodiment. FIG. 21 is a perspective view of a display unit according to Embodiment 6; It is sectional drawing of the display apparatus which concerns on a modification. It is sectional drawing of the display apparatus which concerns on a modification. It is sectional drawing for demonstrating the manufacturing method of the display apparatus which concerns on a modification. It is sectional drawing of the display apparatus which concerns on a modification.

  Hereinafter, a display device according to an embodiment of the present invention will be described with reference to the attached drawings.

Embodiment 1
The display device 1 according to the present embodiment is a so-called large display which is installed outdoors or indoors. As shown in FIG. 1, the display device 1 includes a plurality of light emitting units 11 arranged in a matrix shape and configuring each pixel, and a reflection preventing unit 13 provided on the outer peripheral portion of the plurality of light emitting units 11. Moreover, the display apparatus 1 is provided with the board | substrate 12 in which the light emission part 11 is mounted, as shown in FIG.

  The light emitting unit 11 is a so-called surface mounted type, and as shown in FIG. 2, the light emitting diode 111, the positive electrode terminal 112 connected to the light emitting diode 111 via the wire 114, and a conductive member such as solder And the negative electrode terminal 113 connected via the Furthermore, the light emitting unit 11 includes a housing 115 in which the light emitting diode 111 is disposed, and a sealing unit 116 that seals the light emitting diode 111. The housing 115 is in the form of a rectangular box whose one surface is open, and the light emitting diode 111 is disposed on the bottom surface thereof. The sealing portion 116 is filled in the housing 115.

  The directivity angle θ1 of the light emitted from the light emitting unit 11 is set between 50 ° and 60 °. Here, the “directing angle” means an angle with respect to the optical axis of the radiation direction which is half the light amount of the light emitted in the optical axis direction. The housing 115 is set so as not to block the light emitted from the light emitting diode 111 at the directivity angle θ1. Hereinafter, in the present specification, an area A1 (refer to the cross hatch portion in FIG. 2) in which light whose angle between the radiation direction and the optical axis J1 of the light emitting portion 11 is smaller than the directivity angle θ1 of the light emitting portion 11 is emitted. The light distribution area A1 will be described in which the light emitted from the light emitting unit 11 is distributed.

  The substrate 12 is composed of a rigid substrate such as a glass epoxy substrate and a conductive pattern formed of metal or the like on the rigid substrate to supply power to the light emitting unit 11. The conductor pattern of the substrate 12 is connected to the positive electrode terminal 112 and the negative electrode terminal 113 of the light emitting unit 11 via a conductive member such as solder.

  The reflection preventing portion 13 is provided on an outer peripheral portion or the like of the light emitting portion 11 and prevents reflection of external light incident on the major surface 12 a of the substrate 12. The reflection preventing portion 13 is formed of a low reflection high absorption film having a low light reflectance and a high absorbance. This low reflection and high absorption film is formed of thermosetting resin such as non-light transmitting (for example, black colored) silicone resin and epoxy resin. The anti-reflection portion 13 is formed to extend from the main surface 12 a to the back surface 12 b of the substrate 12. The reflection preventing portion 13 includes a main surface covering portion 13a covering the main surface 12a of the substrate 12, a back surface covering portion 13b covering the back surface 12b of the substrate 12, a main surface covering portion 13a, a back surface covering portion 13b and the substrate 12 side. And a side covering portion 13c covering the side. The height of the main surface covering portion 13a in the thickness direction of the substrate 12 is set to a height L1 substantially the same as the height of the light emitting surface 11a of the light emitting portion 11 in the thickness direction of the substrate 12. Thus, the main surface covering portion 13a is located outside the light distribution area A1 in which the light emitted from the light emitting portion 11 is distributed. Further, the height L3 of the back surface covering portion 13b in the thickness direction of the substrate 12 is set to such a size that the electrical insulation of the conductor pattern formed on the back surface 12b of the substrate 12 can be secured.

  Next, a method of manufacturing the display device 1 according to the present embodiment will be described. First, the light emitting unit 11 is mounted on the substrate 12. Here, the positive electrode terminal 112 and the negative electrode terminal 113 of the light emitting unit 11 are soldered to the conductor pattern formed on the main surface 12 a of the substrate 12 by, for example, a reflow method.

  Next, a molding step of forming the reflection preventing portion 13 is performed by a transfer molding method or an injection molding method. Here, first, as shown in FIG. 3A, the light emitting unit 11 and the substrate 12 are disposed in the region S1 formed by the molds 51 and 52. At this time, the light emitting surface 11 a of the light emitting portion 11 is disposed in a state of being biased in a direction to press against the inner wall of the mold 51 via the buffer material 53 formed of an elastic material. For example, the light emitting unit 11, the substrate 12, and the molds 51 and 52 are held in a posture in which the mold 51 side is vertically downward. In this case, the light emitting unit 11 and the substrate 12 are pressed against the mold 51 via the buffer material 53 by their own weight. As a result, even if the height of the light emitting surface 11a of the light emitting portion 11 from the main surface 12a of the substrate 12 varies, the buffer material 53 elastically deforms to thereby cause the light emitting surface 11a of the light emitting portion 11 and the metal mold 51 Air gaps can be prevented from occurring.

  Next, as shown in FIG. 3B, the liquid resin material 13d is pressed into the region S1. Here, the buffer material 53 plays a role of preventing the intrusion of the resin material 13 d between the light emitting surface 11 a of the light emitting unit 11 and the mold 51. Thereby, it can prevent that the material used as the basis of the reflection prevention part 13 entraps into the space which generate | occur | produces between the light emission surface 11a of the light emission part 11, and the metal mold 51, and the light emission surface 11a of the light emission part 11 is covered. .

  Subsequently, the resin material 13d pressed into the region S1 is cured. Specifically, the resin material 13 d is cured by heating all of the molds 51 and 52, the light emitting unit 11, the substrate 12, and the buffer material 53. The portion where the resin material 13 d is cured becomes the anti-reflection portion 13.

  Thereafter, as shown in FIG. 3C, the molds 51 and 52 and the buffer material 53 are removed (arrows AR11 and AR12 in FIG. 3C).

  As described above, in the display device 1 according to the present embodiment, the anti-reflection unit 13 is located outside the light distribution area A1 in which the light emitted from the light emitting unit 11 is distributed. Specifically, the height in the thickness direction of the substrate 12 of the main surface covering portion 13 a of the anti-reflection portion 13 is set to the height L 1 substantially the same as the height in the thickness direction of the substrate 12 of the light emitting portion 11 . As a result, the light emitted from the light emitting unit 11 is not blocked by the anti-reflection unit 13, so the loss of light emitted from the light emitting unit 11 can be reduced.

  Further, in the method of manufacturing the display device 1 according to the present embodiment, the elastic material is formed between the light emitting surface 11 a of the light emitting unit 11 and the mold 51 disposed opposite to the major surface 12 a of the substrate 12. A buffer 53 is interposed. As a result, even if the height of the light emitting surface 11a of the light emitting portion 11 from the main surface 12a of the substrate 12 varies, the buffer material 53 elastically deforms to thereby cause the light emitting surface 11a of the light emitting portion 11 and the metal mold 51 Since it can prevent that a space | gap generate | occur | produces between, it can prevent that the light emission surface 11a of the light emission part 11 is covered by the reflection prevention part 13. FIG.

Second Embodiment
In the first embodiment, the display device 1 in which the outer peripheral portion of each light emitting unit 11 of the reflection preventing unit 13 is flat has been described. However, the shape of the reflection preventing portion is not limited to the shape described in Embodiment 1 as long as the shape does not block the light emitted from the light emitting portion 11. As in the display device according to the present embodiment, the reflection preventing portion may have a shape in which a recess is provided between the adjacent light emitting portions 11.

  As shown in FIG. 4, in the display device 201 according to the present embodiment, the shape of the anti-reflection portion 213 surrounds each light emitting portion 11 of the main surface covering portion 13 a of the anti-reflection portion 13 described in the first embodiment. It corresponds to what removed the part and formed the hollow part. As shown in FIG. 5, the reflection preventing portion 213 has a main surface covering portion 213a, a back surface covering portion 13b, a side covering portion 213c, and a light emitting portion side covering portion 213d which covers the side of the light emitting portion 11. The material forming the reflection preventing portion 213 is the same as that of the first embodiment. In FIGS. 4 and 5, the same components as in the first embodiment are denoted by the same reference numerals as in FIGS.

  In the main surface covering portion 213a, the height L21 from the main surface 12a of the substrate 12 is smaller than the height L1 from the main surface 12a of the light emitting portion 11 in the thickness direction of the substrate 12. The height L21 is set to such a size that the electrical insulation of the conductor pattern formed on the main surface 12a of the substrate 12 can be secured. When the housing 115 of the light emitting unit 11 is transparent, the thickness of the light emitting unit side covering portion 213 d is set to such a thickness that light transmitted through the housing 115 does not leak to the outside.

  Next, a method of manufacturing the display device 201 according to the present embodiment will be described. First, the light emitting unit 11 is mounted on the substrate 12 in the same manner as the manufacturing method described in the first embodiment. Next, the reflection preventing portion 13 is formed by a transfer molding method or an injection molding method. Here, as shown in FIG. 6A, the manufacturing method described in the first embodiment is different in that a mold 251 provided with a depressed portion 251a at a position corresponding to the light emitting portion 11 is used. Then, the light emitting unit 11 and the substrate 12 are disposed in the region S2 formed by the mold 251 and the mold 252. At this time, the light emitting surface 11 a of the light emitting unit 11 is disposed so as to be in contact with the depressed portion 251 a of the mold 251 via the buffer material 53. Here, a gap S <b> 21 is formed between the inner wall of the recess 251 a and the light emitting portion 11. The size of the recess 251 a of the mold 251 may be set in consideration of the alignment accuracy at the time of disposing the light emitting unit 11 in the mold 251.

  Subsequently, as shown in FIG. 6B, a liquid resin material 213e is pressed into the region S2, and then the resin material 213e is cured. Thereafter, as shown in FIG. 6C, the molds 251 and 252 and the buffer material 53 are removed (arrows AR11 and AR12 in FIG. 6C).

  As described above, in the display device 201 according to the present embodiment, the recessed portion is formed in a portion surrounding each light emitting unit 11 of the reflection preventing unit 213. Thereby, the amount of the resin material 213e required for forming the reflection preventing portion 213 can be reduced compared to the amount of the resin material 13d required for forming the reflection preventing portion 13 according to the first embodiment. Therefore, while being able to attain weight reduction of the reflection prevention part 213, the cost concerning the resin material 213e can also be reduced.

Third Embodiment
By the way, if the intensity of the external light incident on the display device is increased, there is a possibility that the reflection of the external light can not be sufficiently prevented in the reflection preventing portions 13 and 213 having the shapes described in the first embodiment and the second embodiment. There is. In this case, it is conceivable to attach a louver in the vicinity of each light emitting unit 11 in the reflection preventing units 13 and 213 with a screw or the like. However, if the process of attaching a louver with a screw etc. is introduced in the vicinity of each light emission part 11, there exists a possibility that an operation | work burden may increase. Therefore, in the display device according to the third embodiment, a part of the reflection preventing portion in the vicinity of the light emitting portion 11 is a light blocking portion that blocks external light. The light shielding portion is integrally formed with a portion other than the light shielding portion of the reflection preventing portion.

  As shown in FIG. 7, in the display device 301 according to the present embodiment, the reflection preventing portion 313 includes a light shielding portion 313 e for shielding light obliquely incident from the + Y direction side in FIG. 7. Like the display device 1 according to the first embodiment, the display device 301 is used in a state where it is erected so that the −Y direction side in FIGS. 7 and 8 is the ground side. Therefore, when used outdoors, external light from the sun is obliquely incident on the display device 1 from the + Y direction side. In addition to the light shielding portion 313e, as shown in FIG. 8, the reflection preventing portion 313 includes a main surface covering portion 313a, a back surface covering portion 13b, a side covering portion 213c, a light emitting portion side covering portion 313d and an attenuation portion 313f. Have. The material forming the reflection preventing portion 313 is the same as that of the first embodiment. The light shielding portion 313e is continuous with the end portion on the + Y direction side in FIG. 8 in the light emitting portion side covering portion 313d. Moreover, between the adjacent light emission parts 11 in the main surface covering part 313a, the attenuation part 313f which attenuates the light which entered between the adjacent light emission parts 11 is provided. In FIGS. 7 and 8, the same components as those in the second embodiment are denoted by the same reference numerals as those in FIGS.

The light shielding portion 313e is disposed adjacent to the light emitting portion 11 on the + Y direction side in FIG. 8 and blocks external light obliquely incident on the light emitting surface 11a of the light emitting portion 11 from the + Y direction side of the light emitting portion 11. The light shielding portion 313e blocks light incident from the + Y direction side to the light emitting surface 11a at an angle larger than the incident angle θ2. Further, the height L33 of the light shielding portion 313e from the main surface 12a of the substrate 12 in the thickness direction of the substrate 12 is a height that does not block the light emitted from the light emitting portion 11 adjacent to both sides in the Y direction in FIG. It is set. Here, the distance between the light shielding portion 313e and the optical axis J1 of the light emitting portion 11 in the Y direction in FIG. 8 is L31, the height of the light emitting diode 111 from the main surface 12a of the substrate 12 is L34, and the light emitting portion 11 is Assuming that the directivity angle of the light beam is θ1, the following equation (1) is established.
L33 <L32 = L31 / arctan (θ1) + L34 formula (1)

  The attenuation unit 313 f is provided at a position corresponding to the position between the two adjacent light emitting units 11 in the anti-reflection unit 313, and attenuates the intensity of incident external light. The attenuation portion 313 f has a concavo-convex shape, and attenuates the intensity of incident external light by irregularly reflecting incident light.

  As described above, the reflection preventing portion 313 according to the present embodiment includes the light shielding portion 313 e disposed in the vicinity of the light emitting portion 11. Thereby, the incident of the external light to the light emitting surface 11 a of the light emitting unit 11 is prevented, so that the visibility of the light emitting surface 11 a of the light emitting unit 11 can be improved. Further, the light shielding portion 313 e is integrally formed with a portion of the reflection preventing portion 313 other than the light shielding portion 313 e. As a result, the work load in the manufacturing process of the display device 301 can be reduced, and a screw or the like for fixing a louver or the like becomes unnecessary, so the number of parts constituting the display device 301 can be reduced accordingly. Can be

  Further, the reflection preventing portion 213 according to the present embodiment includes an attenuation portion 313 f provided between the adjacent light emitting portions 11. As a result, the amount of reflection of light incident on the display device 301 can be reduced, so that the visibility of the light emitting surface 11 a of the light emitting unit 11 can be improved.

Embodiment 4
Although Embodiment 1 demonstrated the display apparatus 1 in which the light emission surface 11a of the light emission part 11 is flat, the shape of the light emission surface 11a of the light emission part 11 is not limited to this. As shown in FIG. 9, in the display device 401 according to the fourth embodiment, the light emitting surface 411 a of the light emitting unit 411 protrudes outward in a dome shape from one surface of the housing 115. In FIG. 9, the same components as in the third embodiment are assigned the same reference numerals as in FIG. The sealing portion 4116 is formed of an elastic resin material such as silicone resin.

  Next, a method of manufacturing the display device 401 according to the present embodiment will be described. First, the light emitting unit 411 is mounted on the substrate 12 in the same manner as the manufacturing method described in the first embodiment. Next, the reflection preventing portion 313 is formed by a transfer molding method or an injection molding method. Specifically, as shown in FIG. 10A, gold is provided with a depressed portion 451a at a position corresponding to the light emitting portion 411 and the light shielding portion 313e and an uneven portion 451b provided at a position corresponding to the attenuating portion 313f. The type 451 is used. Then, the light emitting unit 411 and the substrate 12 are disposed in the region S3 formed by the mold 451 and the mold 452. At this time, the sealing portion 4116 of the light emitting portion 411 is disposed in pressure contact with the mold 451. As a result, the sealing portion 4116 is deformed along the contact surface with the mold 451 and is in close contact with the mold 451, and a gap is generated between the sealing portion 4116 of the light emitting portion 411 and the mold 451. You can prevent it. Therefore, it is possible to prevent the resin material from entering the space generated between the light emitting surface 411 a of the light emitting unit 411 and the mold 451 and covering the light emitting surface 411 a of the light emitting unit 411.

  Subsequently, as shown in FIG. 10B, after 313 g of liquid resin material is pressed into the region S3, the resin material 313 g is cured. Thereafter, the molds 451 and 452 are removed.

  As described above, in the method of manufacturing the display device 401 according to the present embodiment, it is possible to prevent the generation of a space between the sealing portion 4116 of the light emitting portion 411 and the mold 451 without using a buffer material. . As a result, the process of inserting the buffer material between the mold 451 and the light emitting unit 411 can be omitted, so that the manufacturing process can be simplified. In addition, a light emitting surface 411 a of the light emitting unit 411 protrudes outward in a dome shape from one surface of the housing 115. Thus, the directivity of the light emitted from the light emitting unit 411 can be improved.

Fifth Embodiment
As shown in FIG. 11, the reflection preventing portion 613 according to the fifth embodiment is characterized in that it does not cover the back surface 12 b of the substrate 12. In the display device 601 according to the fifth embodiment, the anti-reflection portion 613 covers the main surface 12 a (see FIG. 12) of the substrate 12 and does not cover the back surface 12 b of the substrate 12. In FIGS. 11 and 12, the same components as in the first embodiment are denoted by the same reference numerals as in FIGS. 1 and 2. The display device 601 further includes a resin portion 616 formed of a resin material and provided around the light emitting portion 11 on the major surface 12 a of the substrate 12. The reflection preventing portion 613 is disposed so as to surround each of the plurality of light emitting portions 11 via the resin portion 616. The material forming the reflection preventing portion 613 is the same as that of the first embodiment. Furthermore, the display device 601 includes a flat rectangular box-like housing 614 whose one surface is open, and a packing 615 attached to the side of the housing 614 opposite to the side where the light emitting unit 11 is disposed. The display device 601 is attached in a state where the packing 615 is in contact with the other housing or the like to which the display device 601 is attached. Thus, water or the like can be prevented from entering the inside of a housing or the like from the attachment portion of the display device 601.

  The housing 614 holds the substrate 12 such that the back surface 12b side of the substrate 12 is exposed to the internal space S6, as shown in FIG. The reflection preventing portion 613 is bonded to the major surface 12 a of the substrate 12. Here, as the adhesive, for example, a water resistant adhesive containing a modified silicone resin or the like is used. The resin portion 616 is formed of, for example, a silicone resin. The substrate 12 is fixed to the housing 614 in a state where the peripheral edge portion of the back surface 12 b is in contact with the step portion 614 b provided on the side wall 614 a of the housing 614. The housing 614 is formed of a metal material. The shortest creepage distance between the conductor pattern and the portion in contact with the housing 614 in the peripheral portion of the substrate 12 is set to such a length that electrical insulation can be maintained. The back surface 12 b of the substrate 12 is exposed to the internal space S 6 of the housing 614.

  Next, a method of manufacturing the display device 601 according to the present embodiment will be described. First, the light emitting unit 11 is mounted on the substrate 12 in the same manner as the manufacturing method described in the first embodiment. Next, the reflection preventing portion 613 is adhered onto the substrate 12 using an adhesive.

  Subsequently, a liquid resin material is poured between the reflection preventing portion 613 and the light emitting portion 11 on the substrate 12. Thereafter, the resin material is cured to complete a module including the substrate 12, the light emitting unit 11, the reflection preventing unit 613, and the resin unit 616. Next, when the completed module and the packing 615 are attached to the housing 614, the display device 601 is completed.

  As described above, according to the display device 601 according to the present embodiment, the back surface 12 b of the substrate 12 is exposed to the internal space S 6 of the housing 614. Thus, for example, if an air cooling fan (not shown) or the like is disposed in the internal space S6 of the housing 614, the back surface 12b of the substrate 12 can be brought into direct contact with cold air flowing out of the air cooling fan. Therefore, for example, as compared with the configuration in which the back surface 12 b of the substrate 12 is covered with the anti-reflection portion 13 as in the display device 1 according to the first embodiment, the substrate 12 can be cooled efficiently.

Sixth Embodiment
In each of the embodiments described above, the light emitting device alone has been described. However, a so-called large screen may be obtained by arranging a plurality of these light emitting devices in two dimensions. As such a configuration, for example, as shown in FIG. 13, a display unit 1000 in which the display device 1 described in the first embodiment is arranged in a 2 × 2 two-dimensional grid shape can be mentioned.

(Modification)
As mentioned above, although embodiment of this invention was described, this invention is not limited by embodiment. For example, in the method of manufacturing the display device 1 described in the first embodiment, a method not using the buffer material 53 may be employed. In this case, the viscosity of the resin material 13d may be appropriately set in accordance with the size of the void that may occur between the light emitting surface 11a of the light emitting unit 11 and the mold 51. By setting the viscosity of the resin material 13 d in this manner, it is possible to prevent the resin material 13 d from intruding into the space generated between the light emitting surface 11 a of the light emitting unit 11 and the mold 51. It can prevent that 11a is covered with the resin material 13d.

  According to this configuration, it is possible to save time and labor for interposing the buffer material between the mold and the light emitting portion, so that the manufacturing process can be simplified.

  In each of the embodiments described above, although the example in which the anti-reflection portion is formed of a non-light-transmitting resin material has been described, the present invention is not limited thereto. For example, the anti-reflection portion is subjected to a matting treatment on its surface It may be formed of a transparent material. In this case, the light emitting surface 11 a of the light emitting unit 11 may be covered by the reflection preventing unit. In addition, the black luminance of the light emitting unit 11 side of the display device may be reduced by making the housing 115 and the substrate 12 of the light emitting unit 11 black.

  FIG. 14 shows a display device 501 according to a modification in which the light emitting surface 11a is covered with a transparent or translucent member whose surface has been subjected to a matting treatment. The same reference numerals as in FIG. 5 denote the same parts in FIG. 14 as in the second embodiment. The reflection preventing portion 513 includes a light emitting portion side covering portion 513 d which covers the side of the light emitting portion 11 and the light emitting surface 11 a of the light emitting portion 11. For example, a blasting process or the like is adopted as the matting process. The reflection preventing portion 513 is formed of a transparent or semi-transparent material whose surface has been subjected to a matting treatment, whereby the reflection of external light is reduced on the surface of the reflection preventing portion 513.

  According to this configuration, since the light emitting surface 11 a of the light emitting unit 11 is covered with the light emitting unit side covering 513 d, the wear of the light emitting surface 11 a can be suppressed.

  In addition, the buffer material 53 can be omitted in the method of manufacturing the display device 201 described in the second embodiment. As a result, since it is possible to save time and labor for inserting the buffer material 53 between the mold 251 and the light emitting unit 11, the manufacturing process can be simplified.

  In the fifth embodiment, the configuration in which the entire back surface 12b of the substrate 12 is exposed has been described. However, the present invention is not limited thereto. For example, the anti-reflection portion may extend from the main surface of the substrate through the through hole provided in the substrate. The configuration may be such that it wraps around on the back side.

  FIG. 15 shows a modification in which the back surface 712 b of the substrate 712 is covered with the anti-reflection portion 713. In FIG. 15, the same components as in the fifth embodiment are designated by the same reference numerals as in FIG. The resin portion 616 is provided on the main surface 12 a of the substrate 712. The substrate 712 has a through hole 712 c penetrating in the thickness direction of the substrate 712 between two adjacent light emitting units 11. The anti-reflection portion 713 has a main surface covering portion 713 a covering the main surface 712 a of the substrate 712 and a back surface covering portion 713 b covering the rear surface 12 b of the substrate 12. The reflection preventing portion 713 is a main surface covering portion 713a, a back surface covering portion 713b located on the periphery of the substrate 12, and a side covering portion 713c covering the side of the substrate 712, a main surface covering portion 713a and a rear surface covering portion 713b. And a connecting portion 713 d connecting the The coupling portion 713 d is located inside the through hole 712 c of the substrate 712.

  Here, a method of manufacturing the display device 701 according to the present modification will be described. First, the light emitting unit 11 is mounted on the substrate 12 in the same manner as the manufacturing method described in the first embodiment. Next, a reflection preventing portion 713 and a resin portion 616 are formed by a two-color molding method. Here, as shown in FIG. 16A, a mold 751 provided with a depressed portion 751 a at a position corresponding to the light emitting portion 11 is covered from the main surface 712 a of the substrate 712. At this time, the light emitting surface 11 a of the light emitting unit 11 is disposed so as to be in contact with the depressed portion 751 a of the mold 751 via the buffer material 53. Then, a liquid resin material 616a to be a base of the resin portion 616 is pressed into each of the regions S71 formed between the mold 751 and the main surface 712a of the substrate 712. Then, the resin part 616 is formed by heating the whole of the light emitting part 11, the substrate 12, the buffer material 53, the mold 751, and the resin material 616a to cure the resin material 616a.

  Subsequently, as shown in FIG. 16B, the mold 751 is removed (see an arrow AR13 in FIG. 16B).

  Thereafter, as shown in FIG. 16C, the light emitting portion 11, the substrate 12, and the resin portion 616 are disposed in the region S72 formed by the mold 752 and the mold 753. Then, a liquid resin material 713e to be a base of the anti-reflection portion 713 is pressed into each region S72 formed between the mold 751 and the main surface 712a of the substrate 712. At this time, the resin material 713 e on the main surface 712 a side of the substrate 712 is press-fit to the back surface 712 b side of the substrate 712 through the through holes 712 c of the substrate 712. Thereafter, the whole of the light emitting portion 11, the substrate 12, the resin portion 616, the buffer material 53, the molds 752, 753, and the resin material 713e is heated to cure the resin material 713e, thereby forming the antireflective portion 713.

  Next, after removing the molds 752 and 753 and the buffer material 53, the packing 615 is attached to the anti-reflection portion 713, and the display device 701 is completed.

  According to this configuration, the back surface 712 b of the substrate 712 is exposed without being covered by the anti-reflection portion 713. Thus, the heat generated at the substrate 712 can be dissipated to the outside from the exposed portion of the back surface 712 b of the substrate 712, so that the entire back surface 12 b of the substrate 12 is covered with the anti-reflection portion 13 as in the first embodiment, for example. The heat dissipation of the substrate 712 can be improved as compared with the configuration described above.

  In the display device 701 shown in FIG. 15 and FIG. 16 described above, the packing 615 may be omitted. FIG. 17 shows a display device 801 according to a modification of the configuration in which the packing 615 is omitted. In FIG. 17, the same components as those shown in FIG. 15 are designated by the same reference numerals as in FIG. The display device 801 is different from the configuration shown in FIG. 16 in that the side covering portion 813 c of the reflection preventing portion 813 is formed of an elastic material. The side covering portion 813 c of the anti-reflection portion 813 is made of, for example, an elastic resin material such as silicone resin. The reflection preventing portion 813 is formed by, for example, a two-color molding method.

  In the method of manufacturing the display device 601 according to the fifth embodiment, the example in which the reflection preventing portion 613 is adhered to the main surface 12 a of the substrate 12 using an adhesive has been described, but it is not limited thereto. 613 and the resin portion 616 may be formed by a two-color molding method.

  In the first embodiment, an example in which the substrate 12 includes a rigid substrate has been described. However, the present invention is not limited to this. For example, the substrate 12 may include a flexible substrate or a rigid flexible substrate.

  In Embodiment 1, although the example in which the reflection preventing portion 13 is formed of a thermosetting resin such as a silicone resin or an epoxy resin has been described, the material of the reflection preventing portion 13 is not limited to this. For example, the antireflective portion 13 may be formed of a thermoplastic resin such as an acrylic resin or a polytetrafluoroethylene resin colored in black.

  In this case, in the manufacturing process of the display device 1, the whole of the molds 51 and 52, the light emitting unit 11, the substrate 12 and the buffer material 53 is heated to a temperature at which the resin material 13 d is liquefied. The resin material 13d may be pressed into the inside. Then, the resin material 13 d may be cured by cooling the whole of the molds 51 and 52, the light emitting unit 11, the substrate 12, the buffer material 53 and the resin material 13 d to normal temperature.

  In the sixth embodiment, an example in which the display unit 1000 is configured from the display device 1 described in the first embodiment has been described. However, the present invention is not limited to this. The display unit 1000 is the other embodiment or modification described above. May be configured from the display device described above. Alternatively, the display unit 1000 may be configured by combining these display devices.

  As mentioned above, although each embodiment and modification of the present invention (including the thing described in the statement. Hereinafter, the same) were explained, the present invention is not limited to these. The present invention includes those in which the embodiments and the modifications are combined as appropriate, and those in which changes are appropriately applied.

  The present invention can be suitably used for a display device used outdoors or indoors.

1, 201, 301, 401, 501, 601, 701, 801 Display device, 11, 411 light emitting unit, 11a, 411a light emitting surface, 12, 712 substrate, 12a, 712a main surface, 12b, 712b back surface, 13, 213, 313, 413, 513, 613, 713, 813 Anti-reflection portion, 13a, 213a, 313a, 713a Main surface covering portion, 13b, 713b Back surface covering portion, 13c, 213c, 713c, 813c Side covering portion, 13d, 213e, 313 g, 616 a, 713 e resin material, 51, 52, 251, 252, 452, 451, 751, 752, 753 mold, 53 buffer material, 111 light emitting diode, 112 positive terminal, 113 negative terminal, 114 wire, 115 housing, 116, 4116 sealing part, 213d, 313d, 13d light emitting part side covering part, 251a, 451a, 751a recessed part, 313e light shielding part, 313f attenuation part, 451b uneven part, 614 housing, 614a side wall, 614b stepped part, 615 packing, 616 resin part, 712c through hole, 713 d Coupling portion, 1000 display unit, A1 light distribution area, J1 light axis, θ1 directivity angle

Claims (8)

A plurality of light emitting units arranged in a matrix;
A substrate on which the plurality of light emitting units are mounted;
A reflection preventing portion provided on an outer peripheral portion of each of the plurality of light emitting portions on the main surface on the light emitting portion side of the substrate and preventing reflection of external light incident on the main surface of the substrate;
And a case for holding the substrate in a form in which the back surface side opposite to the main surface of the substrate is exposed to the internal space ,
The substrate has a through hole penetrating in the thickness direction of the substrate between two adjacent light emitting units,
The reflection preventing unit, the one-way side perpendicular to the optical axis of the plurality of light emitting portions of at least the light emitting portion, located outside the light distribution area where light emitted from the plurality of light emitting portions are light distribution A main surface covering portion covering the main surface, a back surface covering portion covering the back surface, and a coupling portion located inside the through hole and coupling the main surface covering portion and the back surface covering portion; Not covering at least a part of the back surface of the substrate,
Display device. The reflection preventing portion is
A main surface covering portion covering the main surface and having a height from the main surface equal to or less than the height from the main surface of the light emitting portion in the thickness direction of the substrate;
And a light emitting portion side covering portion covering the side of the light emitting portion.
The display device according to claim 1. The reflection preventing portion is
The external light is disposed adjacent to the other direction side opposite to the one direction orthogonal to the optical axis of the light emitting portion, and external light incident toward the light emitting surface of the light emitting portion from the other direction side of the light emitting portion Have a light shield to shut off
The display device according to claim 1 or 2. The reflection preventing portion is
It has an attenuation part which is provided at a corresponding part between two adjacent light emitting parts and which attenuates the intensity of incident external light,
The display device according to any one of claims 1 to 3. The light emitting unit is
A light emitting diode,
A housing that is open on one side and in which the light emitting diode is disposed inside;
And a sealing portion formed of an elastic material and filling at least the inside of the housing and sealing the light emitting diode.
The light emitting surface protrudes outward in a dome shape from the one surface of the housing,
The display device according to any one of claims 1 to 4. The reflection preventing portion is formed of a resin material.
The display device according to any one of claims 1 to 5 . The reflection preventing portion is formed of a translucent material.
The display apparatus of any one of Claim 1 to 6 . A plurality of display devices according to any one of claims 1 to 7 ,
Display unit.