JP5328698B2 - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device in which no chromaticity spot or luminance spot is generated. <P>SOLUTION: The display device 1 includes a surface mounted light-emitting device 10 that is a light-emitting device of a surface mounted type, a wiring board 20 on which the surface mounted light-emitting device 10 is mounted, a lens part 30 disposed in front of the surface mounted light-emitting device 10, and a frame part 40 disposed to surround the lens part 30 and configured to determine the position of the lens part 30. A filled resin part filled with a synthetic resin is disposed between the surface mounted light-emitting device 10 and the lens part 30. The synthetic resin contains a translucent resin and a defoaming agent. The lens part 30 and the frame part 40 form an integrated lens array module. The wiring board 20 is attached to a casing 50, and an eaves part 60 is disposed on the front side of the lens part 30. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a display device including a wiring board on which a surface-mounted light emitting device is arranged.

  Conventionally, a lighting device using a light emitting element is known (see, for example, Patent Document 1). Further, in a display device in which a plurality of light emitting elements are arranged in a matrix on a wiring board, a color image or the like can be displayed by selectively lighting the light emitting elements. In particular, when a light emitting diode (LED) is used as the light emitting element, a clear image with high luminance can be obtained.

  FIG. 13 is a schematic cross-sectional view showing the structure of a conventional lighting device 600.

  A conventional lighting device 600 includes a wiring board 602 on which a plurality of light emitting elements 603 are mounted, a case 601 provided with a housing recess 610 in which the wiring board 602 is housed, a wiring board 602 and a light emitting element 603. And a sealing portion 604 for resin sealing. A support convex portion 611 protrudes from the inner surface of the storage concave portion 610. The wiring substrate 602 is placed on the support convex portion 611 with the mounting surface 602a, which is the surface on which the light emitting element 603 is mounted, facing the bottom surface of the housing concave portion 610. The sealing portion 604 is formed by filling the housing recess 610 with a translucent resin to a depth at which the wiring substrate 602 is buried. The wiring board 602 is provided with a vent hole 620 for exhausting air bubbles mixed in the translucent resin to the opening side of the housing recess 610. Further, since the mounting surface 602a side of the vent hole 620 is provided with a counterbore 623 and has a wide opening, the air bubbles in the translucent resin are easily guided to the vent hole 620.

  However, in the conventional lighting device 600, the bubbles may not pass through the vent hole 620, and the bubbles may remain in the translucent resin. The remaining bubbles scatter light, resulting in luminance spots and chromaticity spots on the light emitting surface. That is, since there is a difference in refractive index between the bubble and the translucent resin, light from the light emitting element is reflected, refracted, and scattered on the surface of the bubble. Therefore, there is a difference in luminance and chromaticity between the portion where bubbles are present and the surrounding area. Moreover, since it is necessary to form the ventilation hole 620 in the wiring board 602, there also existed a problem that a manufacturing man-hour increased.

  Further, in a display device including a plurality of light emitting elements, since bubbles do not remain uniformly, the brightness and chromaticity vary among the light emitting elements.

  Furthermore, the translucent resin and the wiring board may be peeled off due to the remaining bubbles. As a result, the yield and reliability of the display device decrease.

JP 2007-80528 A

  In the conventional lighting device, bubbles may remain in the translucent resin. For this reason, there is a problem that luminance spots and chromaticity spots on the light emitting surface cannot be suppressed.

  The present invention has been made in order to solve the above-described problems, and by using a synthetic resin containing a defoaming agent and a translucent resin that eliminates bubbles, a display that does not cause chromaticity spots or luminance spots is generated. An object is to provide an apparatus.

A display device according to the present invention is disposed so as to surround a surface-mounted light-emitting device that is surface-mounted on a wiring board, a lens unit that is disposed to face the surface-mounted light-emitting device, and a periphery of the lens unit. A display device including a frame body portion, and a filling resin portion formed by filling a synthetic resin between the surface mount light emitting device and the lens portion. The lens portion includes a curved surface portion having a curved surface, and a holding portion that extends from the curved surface portion to the frame body portion and holds the curved surface portion. , Applied to the filling of the synthetic resin, the resin outlet formed opposite to the resin inlet, and the evaporation of moisture attached to the surface mount light emitting device and the lens unit And a moisture evaporation port to be provided .

Therefore, bubbles in the filled resin portion are reduced by the antifoaming agent. As a result, light scattering caused by bubbles can be prevented, and chromaticity spots and luminance spots can be suppressed. In addition, since the bubbles in the filling resin portion are reduced, peeling between the filling resin portion and the lens portion or the surface-mounted light emitting device generated by the bubbles can be prevented, so that the reliability of the display device can be improved. By providing the resin injection port, the resin filling portion can be formed easily and with high accuracy. Furthermore, before filling with the synthetic resin, moisture can be discharged to the outside from the moisture evaporation port. That is, since the water | moisture content causing a bubble generation can be removed, the bubble of a filling resin part is further reduced.

  In the display device according to the present invention, the resin injection port or the resin discharge port is applied to evaporation of moisture attached to the surface mount light emitting device and the lens unit.

  Therefore, before filling with the synthetic resin, moisture can be discharged to the outside from the resin injection port and the resin discharge port. That is, since the water | moisture content causing a bubble generation can be removed, the bubble of a filling resin part is further reduced.

  In the display device according to the present invention, an inner side surface of the curved portion facing the wiring board is convex toward the wiring board.

  Therefore, bubbles remaining between the surface-mounted light emitting device and the curved surface portion can be further reduced.

  In the display device according to the present invention, the defoamer particles have a diameter of 0.1 μm to 20 μm.

  Therefore, if the diameter of the particles is 0.1 μm or more, the bubbles for peeling the synthetic resin can be surely eliminated. Moreover, when the diameter of the particles is 20 μm or less, the nozzle of the injector can be prevented from being clogged when the synthetic resin is injected.

  In the display device according to the present invention, the antifoaming agent and the translucent resin have substantially the same refractive index.

  Therefore, since the light transmittance in the filling resin portion can be improved, the light extraction efficiency from the surface mount light emitting device can be increased.

  In the display device according to the present invention, the antifoaming agent and the translucent resin have substantially the same linear expansion coefficient.

  Therefore, peeling between the antifoaming agent and the translucent resin due to heat cycle can be prevented, and the reliability of the present invention can be improved.

  In the display device according to the present invention, the antifoaming agent and the translucent resin are made of a similar synthetic resin material.

  Therefore, it is suitable for reducing the difference in refractive index and linear expansion coefficient between the antifoaming agent and the translucent resin.

  In the display device according to the present invention, the antifoaming agent is made of resin particles.

  Therefore, by using resin particles that are not dissolved in the light-transmitting resin, the reliability of the display device can be improved without reducing the function of the synthetic resin.

  In the display device according to the present invention, the resin particles include epoxy resin particles, acrylic resin particles, imide resin particles, phenol resin particles, silicone resin particles, norbornene resin particles, polymethylpentene resin particles, amorphous nylon resin particles, It contains at least one selected from polystyrene resin particles, polyarylate resin particles, polycarbonate resin particles, epoxy-modified silicone resin particles, and organic-modified silicone resin particles.

  Therefore, the filling resin part according to the characteristic or the use of a display apparatus can be provided by using the resin particle optimal for an antifoamer.

  In the display device according to the present invention, the antifoaming agent is composed of inorganic substance particles.

  Therefore, by using resin particles that are not dissolved in the light-transmitting resin, the reliability of the display device can be improved without reducing the function of the synthetic resin.

  In the display device according to the present invention, the inorganic substance particles include at least one selected from silica particles, quartz particles, glass particles, calcium carbonate particles, barium sulfate particles, and aluminum hydroxide particles. .

  Therefore, the filling resin part according to the characteristic or use of a display apparatus can be provided by using the inorganic substance particle | grains optimal for an antifoamer.

According to the display device according to the present invention, bubbles in the filled resin portion are reduced by the antifoaming agent. As a result, light scattering caused by bubbles can be prevented, and chromaticity spots and luminance spots can be suppressed. In addition, since the bubbles in the filling resin portion are reduced, peeling between the filling resin portion and the lens portion or the surface-mounted light-emitting device generated by the bubbles can be prevented, so that the reliability of the display device can be improved. . By providing the resin injection port, the resin filling portion can be formed easily and with high accuracy. Furthermore, before filling with the synthetic resin, moisture can be discharged to the outside from the moisture evaporation port. That is, since the water | moisture content causing a bubble generation can be removed, the bubble of a filling resin part is further reduced.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing explaining the display apparatus which concerns on embodiment of this invention, (A) is a top view, (B) is the side view seen from the arrow B direction of (A), (C) is (A). It is the side view seen from the arrow C direction. It is process drawing which shows the outline | summary of the manufacturing process of the display apparatus which concerns on embodiment of this invention. It is explanatory drawing explaining the surface mount type light-emitting device mounted in the display apparatus which concerns on embodiment of this invention, (A) is a top view, (B) is transparently seen from the arrow B direction of (A). It is a see-through | perspective side view which shows the principal part of the state seen. FIG. 4 is a partially enlarged plan view partially enlarged showing a state in which the surface-mounted light emitting device shown in FIG. 3 is mounted on a wiring board. It is explanatory drawing explaining the basic composition of the lens part applied to the display apparatus which concerns on embodiment of this invention, (A) is a top view, (B) is a cross section in the arrow BB of (A). FIG. 4C is a cross-sectional view taken along arrows CC in FIG. It is explanatory drawing explaining Example 1 of a lens part, (A) is a top view, (B) is sectional drawing in the arrow BB of (A), (C) is the arrow C of (A). It is sectional drawing in -C. It is explanatory drawing explaining Example 2 of a lens part, (A) is a top view, (B) is sectional drawing in the arrow BB of (A), (C) is the arrow C of (A). It is sectional drawing in -C. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an enlarged explanatory view showing a partial state of a lens array module formed by molding two colors of a lens part and a frame part applied to a display device according to an embodiment of the present invention. A plan view, (B) is a cross-sectional view taken along arrows BB in (A). It is explanatory drawing explaining the whole lens array module shown in FIG. 8, (A) is a top view, (B) is a see-through | perspective side view which shows the state seen through from the arrow B direction of (A). is there. In the manufacturing process of the display device according to the embodiment of the present invention, a wiring substrate having a lens array module attached thereto is attached to a housing, and a synthetic resin is filled between the surface mount type light emitting device and the lens portion to fill the resin portion. 2A is a schematic side view schematically illustrating a side surface state, and FIG. 2B is an enlarged cross-sectional view illustrating a region indicated by reference numeral B in FIG. BRIEF DESCRIPTION OF THE DRAWINGS In the manufacturing process of the display apparatus which concerns on embodiment of this invention, it is explanatory drawing explaining the state which formed the frame cover part, (A) is a schematic side view which shows typically a side surface state, (B) is It is an expanded sectional view which expands and shows the area | region of the code | symbol B of (A). In the manufacturing process of the display apparatus which concerns on embodiment of this invention, it is explanatory drawing explaining the state which attached the eaves part, (A) is a model side view which shows typically a side surface state, (B) is (A It is an expanded sectional view which expands and shows the area | region of the code | symbol B of (). It is the schematic sectional drawing which showed the structure of the conventional illuminating device.

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

  1A and 1B are explanatory diagrams illustrating a display device according to an embodiment of the present invention, in which FIG. 1A is a plan view, FIG. 1B is a side view seen from the direction of arrow B in FIG. These are the side views seen from the arrow C direction of (A).

  The display device 1 according to the present embodiment includes a surface-mounted light-emitting device 10 that is a surface-mounted light-emitting device, a wiring board 20 on which the surface-mounted light-emitting device 10 is mounted, and a front surface of the surface-mounted light-emitting device 10. The lens unit 30 is disposed on the lens unit 30 and the frame unit unit 40 is disposed around the lens unit 30. The wiring board 20 is attached to the housing 50, and the eaves part 60 is disposed on the front side of the lens part 30. The housing 50 includes an engaging portion 51 that facilitates attachment to an electronic device in which the display device 1 is installed.

  In the present embodiment, the surface-mounted light-emitting devices 10 are arranged in a dot matrix of 16 vertically (16 rows) and 16 horizontally (16 columns), and a total of 256 surface-mounted light-emitting devices 10 are wired. It is mounted on the substrate 20. Further, 16 eaves portions 60 are arranged corresponding to 16 rows in the vertical direction.

  As described above, the display device 1 according to the present embodiment includes the surface-mounted light-emitting device 10 having the external terminals 11 for surface mounting (see FIG. 3) and the wiring board 20, and the surface-mounted light-emitting device 10. The lens unit 30 is disposed opposite to the lens unit 30, and the frame body unit 40 is disposed so as to surround the lens unit 30.

  Therefore, the display device 1 collects the light emitted from the surface-mounted light-emitting device 10 and improves the light intensity in front of the lens unit 30, so that lighting and non-lighting can be clearly distinguished and displayed. In addition, the connection structure can be simplified, the workability and reliability of connection (mounting) can be improved, and the thickness can be reduced.

  FIG. 2 is a process diagram showing an outline of the manufacturing process of the display device according to the embodiment of the present invention.

  The display device 1 according to the present embodiment is manufactured using the following steps S1 to S7 as main manufacturing processes.

Step S1:
The surface-mounted light emitting device 10 (see FIG. 3 described later) is mounted on the wiring board 20 (see FIG. 4 described later).

Step S2:
A lens array 40L (lens array module 40m; see FIG. 9 described later) is attached to the wiring board 20 (see FIG. 10 described later). The lens array module 40 m is formed in an appropriate size as an attachment unit of the frame body portion 40 and is attached to the wiring board 20.

Step S3:
The wiring board 20 is attached to the housing 50 (see FIG. 10).

Step S4:
Heat treatment is performed at 150 ° C. for 1 hour.

Step S5:
A space between the surface-mounted light emitting device 10 and the lens unit 30 is filled with a synthetic resin (see FIG. 10).

Step S6:
The filled synthetic resin is cured to form a filled resin portion 38 (see FIG. 10).

Step S7:
A frame covering portion 47 (see FIG. 11 described later) is formed.

Step S8:
The eaves part 60 (refer FIG. 12 mentioned later) is attached.

  3A and 3B are explanatory diagrams for explaining a surface-mounted light-emitting device mounted on a display device according to an embodiment of the present invention, where FIG. 3A is a plan view and FIG. 3B is a direction of arrow B in FIG. It is a see-through | perspective side view which shows the principal part of the state seen from seeing through.

  The surface-mounted light emitting device 10 has an external terminal 11 for surface mounting. The surface-mount light-emitting device 10 includes a package part 12 formed in an appropriate shape and a recess 13 formed in the package part 12. Mounted in the recess 13 are a semiconductor light emitting element 14r that emits red (R), a semiconductor light emitting element 14g that emits green (G), and a semiconductor light emitting element 14b that emits blue (B).

  In road display (especially, when it is necessary to call attention with characters), orange or red is often used as the character color from the viewpoint of visibility and attention. Usually, the orange color is generated by mixing red and green. Therefore, visibility can be improved by arranging red in the center. In the surface mount light emitting device 10 according to the present embodiment, the semiconductor light emitting element 14r is arranged in the center, and the semiconductor light emitting element 14g and the semiconductor light emitting element 14b are arranged on both sides of the semiconductor light emitting element 14r, thereby improving the visibility. I am trying.

  The semiconductor light emitting element 14r, the semiconductor light emitting element 14g, and the semiconductor light emitting element 14b are mounted on the bottom surface of the recess 13 in a chip state in which the semiconductor substrate is divided, and are connected to the external terminal 11 through, for example, wires. The concave portion 13 is filled with a translucent resin portion 15 to protect the semiconductor light emitting element 14r, the semiconductor light emitting element 14g, and the semiconductor light emitting element 14b from the external environment. Although the number of the semiconductor light emitting elements 14r, the semiconductor light emitting elements 14g, and the semiconductor light emitting elements 14b is one, it is possible to arrange a plurality of them.

  In addition, the opening shape of the recessed part 13 can give the breadth to a horizontal direction in a light emission pattern by making it rectangular shape as shown in figure. With this configuration, the spread of light emission in the lateral direction can be provided as compared with a circular shape. Further, by making the opening shape of the concave portion 13 rectangular, the light guide property to the holding portion 32 (see FIG. 5) having a rectangular shape is improved, the light intensity of the curved surface portion 31 is improved, and the light extraction efficiency is improved. be able to.

  Further, the opening shape of the concave portion 13 can be similar to the curved surface portion 31 (see FIG. 5) of the lens portion 30. That is, the loss of optical coupling between the surface-mounted light-emitting device 10 (opening shape of the concave portion 13) and the curved surface portion 31 is achieved by making the opening shape of the concave portion 13 serving as the light emission pattern face the outer peripheral shape of the curved surface portion 31. Can be reduced.

  Further, a black portion 16 is formed on the surface of the package portion 12 (outside the surface of the concave portion 13) to improve the recognizability (discriminability) of light emitted from the concave portion 13. The package unit 12 may be any shape as long as it can be surface-mounted on the wiring board 20. In FIG. 3, the surface of the package part 12 is shown as being flat. However, for example, the translucent resin part 15 may have some lens characteristics (convex shape) inside the black part 16.

  As described above, the surface-mounted light emitting device 10 mounted on the display device 1 includes a plurality of semiconductor light emitting elements 14r, semiconductor light emitting elements 14g, and semiconductor light emitting elements 14b having different emission colors. Therefore, the display device 1 can display multicolor. That is, the semiconductor light-emitting element 14r, the semiconductor light-emitting element 14g, and the semiconductor light-emitting element 14b can constitute one pixel that displays a multicolor as a set.

  FIG. 4 is a partially enlarged plan view partially showing a state where the surface-mounted light emitting device shown in FIG. 3 is mounted on a wiring board.

  Since the surface-mounted light-emitting device 10 has the external terminals 11 for surface mounting, it is placed and mounted (connected) as it is on the surface (display surface 20 d) of the wiring board 20. In FIG. 4, only the portion of the wiring board 20 (display surface 20d) (the arrangement state of the surface-mounted light emitting device 10 in the vicinity of the end of the wiring board 20) is shown in an enlarged manner for easy viewing.

  Since the surface mount light emitting device 10 is a surface mount type, the height of the surface mount light emitting device 10 on the wiring board 20 is the height of the package portion 12 of the surface mount light emitting device 10. Accordingly, it is possible to reduce the thickness of the wiring board 20 along the display surface 20d.

  The height of a bullet-type LED lamp (bullet-type light emitting device) generally employed in conventional display devices is usually 24 mm because the length of the lead needs to be taken into consideration. Therefore, when the bullet-type LED lamp is mounted on the wiring board 20, the height from the board surface is 14 mm by subtracting the lead length by 10 mm. On the other hand, the height of the surface-mounted light-emitting device 10 is, for example, 1.4 mm. Therefore, the height from the substrate surface when the surface mount light emitting device 10 is mounted on the wiring substrate 20 can be set to 1.4 mm. That is, the display device 1 can be thinned by adopting the surface mount light emitting device 10.

  Further, the weight of the bullet-type LED lamp is, for example, 0.28 g (gram), and the weight of the surface-mounted light-emitting device 10 is, for example, 0.025 g (gram). Therefore, by employing the surface mount light emitting device 10, the weight of the surface mount light emitting device 10 can be reduced to 1/10 compared to the conventional example. That is, the display device 1 can be reduced in weight by adopting the surface mount light emitting device 10. In addition, since it is possible to reduce the price, when the display device 1 is adopted as a road information display device, the construction cost related to road construction can be reduced.

  The planar shape of the wiring board 20 is a rectangle of 160 mm × 160 mm (see FIG. 1), for example, and the thickness of the wiring board 20 is, for example, 1 mm. Further, the surface-mounted light-emitting device 10 arranged on the display surface 20d in a dot matrix of 16 rows × 16 columns has a vertical arrangement pitch of 10 mm and a horizontal arrangement pitch of 10 mm. Note that the arrangement of the surface-mounted light-emitting device 10 is not limited to a dot matrix, and may be an arbitrary pattern depending on the display specifications of the display device to be applied.

  The wiring board 20 has a wiring pattern (not shown) for arranging and fixing (connecting) the surface-mounted light emitting device 10. That is, the external terminals 11 of the surface-mount light-emitting device 10 are electrically and mechanically connected to the wiring substrate 20 (wiring pattern) by a conductive member such as solder. In addition, a drive circuit 70 (see FIG. 10) that supplies power to the surface-mounted light-emitting device 10 via a wiring pattern is mounted on the back surface 20c (see FIG. 10) opposite to the display surface 20d.

  The wiring board 20 preferably has high mechanical strength and little thermal deformation. Specifically, a printed board using an insulating synthetic resin, ceramics, glass, aluminum alloy or the like, that is, a rigid board can be suitably used.

  The display surface 20 d is arranged corresponding to the display surface of the display device 1. Therefore, in order to improve contrast, moisture resistance, and insulation, the wiring board 20 is preferably formed of a black resin having moisture resistance. It is also possible to apply a black resin on the surface of the wiring board 20 (display surface 20d) in the form of solder resist or marking ink.

5A and 5B are explanatory views for explaining a basic configuration of a lens unit applied to the display device according to the embodiment of the present invention. FIG. 5A is a plan view, and FIG. 5B is an arrow B- in FIG. Sectional drawing in B, (C) is a sectional view at arrow CC in (A).

The basic configuration of the lens unit 30 according to the present embodiment is a curved surface portion 31 (curved surface portion 31 having a curved surface) that is a convex lens and has a condensing characteristic, and from the curved surface portion 31 to the frame body portion 40 (see FIG. 8). And a holding portion 32 that extends to hold the curved surface portion 31. Therefore, the display device 1 can improve the display characteristics (display accuracy) because the lens unit 30 and the frame body unit 40 can be formed with high accuracy while securing the light condensing characteristics.

  The holding portion 32 includes a skirt portion 36 that extends toward the wiring substrate 20 and contacts the frame body portion 40 (see FIG. 8). Therefore, the lens portion 30 and the frame body portion 40 can be easily and highly accurately formed, and the filling resin portion 38 (see FIG. 10) can be easily and highly accurately formed.

  Further, the skirt portion 36 is expanded outward toward the wiring substrate 20 with respect to the holding portion 32 side. That is, the surface 36 s of the bottom portion 36 is inclined so as to spread from the holding portion 32 toward the wiring substrate 20. Therefore, the frame body portion 40 and the skirt portion 36 can be easily formed. That is, when the lens portion 30 and the frame body portion 40 are integrally formed by a two-color molding method, the releasability from the injection mold can be improved. The inclination angle of the surface 36s is 2 degrees.

  The skirt portion 36 (lens portion 30) has a frame shape in consideration of the alignment with the frame body portion 40, and is appropriately chamfered (chamfered) in order to clarify the directionality. The surface-mounted light emitting device 10 is disposed inside the skirt portion 36, and further filled with a synthetic resin to form a filled resin portion 38 (see FIG. 10). The bottom portion 36 is preferably formed in all directions, but is not limited thereto. That is, the bottom portion 36 may be configured to be positioned with respect to the frame body portion 40.

  The lens material of the lens unit 30 is an ultraviolet absorber-containing polycarbonate resin, that is, a translucent polycarbonate resin. Therefore, it is possible to prevent the ultraviolet light contained in the external light from being irradiated to the surface-mounted light emitting device 10 (see FIG. 10) disposed inside the lens unit 30. In addition, phenyl salicylate was applied as an ultraviolet absorber.

  The ultraviolet absorber-containing resin is formed by blending and dispersing an ultraviolet absorber in a polycarbonate resin as a translucent resin material. As the ultraviolet absorber, various organic ultraviolet absorbers such as salicylic acid, triazine, benzophenone, and cyanoacrylate can be applied.

  As the lens material, it is possible to use a resin material that can be molded, such as acrylic or polycarbonate. Acrylic is excellent in weather resistance, but it has drawbacks in impact resistance and heat resistance, and its refractive index is 1.49, which is lower than 1.59 of polycarbonate, so that it will have the same light collecting characteristics (lens characteristics). In this case, the lens thickness is larger than that of polycarbonate.

  Polycarbonate is excellent in heat resistance and impact resistance, but is inferior in weather resistance due to problems such as a decrease in transmittance and yellowing caused by ultraviolet rays contained in sunlight. In order to improve weather resistance, there is a weather resistant type polycarbonate to which an ultraviolet absorber is added. In the present embodiment, as described above, a weather-resistant type polycarbonate is applied.

  The curved surface portion 31 had a diameter of 6 mm, a height of 5.74 mm (including the skirt portion 36), and a lens thickness of 2.9 mm. An inner side surface 31 r of the curved surface portion 31 facing the wiring board 20 is convex toward the wiring board 20.

  The holding portion 32 includes a resin injection port 34 that is applied as an injection port when filling with a synthetic resin (filled resin portion 38), and a resin discharge port 35 that is formed to face the resin injection port 34. By injecting the synthetic resin from the resin injection port 34 and discharging the excessively supplied synthetic resin from the resin discharge port 35, it becomes possible to vent the inside of the lens unit 30 (inside the resin filling portion 38 is formed). In addition, the filled resin portion 38 free from bubbles can be formed easily and with high accuracy. Therefore, it is desirable that the resin injection port 34 and the resin discharge port 35 are arranged at positions facing each other on the plane of the holding portion 32.

  The holding part 32 is preferably formed in a polygonal shape having a bowl shape in a crossing direction with respect to the optical axis of the circular curved surface part 31 in plan view and having at least four corners in plan view. By making the holding part 32 into a quadrilateral or more polygonal shape, the resin injection port 34 and the resin discharge port 35 can be arranged so as to face each other at diagonally arranged corners, and with high accuracy. Can be formed.

  If the holding portion 32 is circular in a plan view, it is difficult to make the resin injection port 34 and the resin discharge port 35 face each other with high accuracy, and even if formed, the arrangement is distorted, and the injection and discharge of the synthetic resin are performed with high accuracy. It becomes impossible to carry out. If the base portion 36 is disposed in a state where the holding portion 32 is not disposed, the resin injection port 34 and the resin discharge port 35 cannot be substantially formed.

  The resin injection port 34 has a size corresponding to the size of the nozzle of the injection machine for injecting the synthetic resin. In addition, the resin discharge port 35 has a shape that can efficiently discharge air mixed in the synthetic resin by making it wider than the width of the resin injection port 34.

  In the present embodiment, the lens portion 30 is formed by injection molding, and is disposed at an outer position where the holding portion 32 is extended, and corresponds to the gate portion 32g corresponding to the gate portion of the injection mold. A step 32s formed between the portion 32g and the holding portion 32 is provided.

  Therefore, in the display device 1, when the frame body covering portion 47 (see FIG. 11) that covers the frame body portion 40 and the holding portion 32 is formed, the resin corresponding to the mold gate portion remains in the gate corresponding portion 32 g. The flatness of the frame covering portion 47 with respect to the holding portion 32 can be ensured.

  If there is no step 32s and there is a resin residue (gate resin residue) in the gate corresponding part 32g, the frame cover 47 is formed on the gate corresponding part 32g in the region of the gate corresponding part 32g. The overlapped frame cover 47 is raised, and the surface of the frame cover 47 does not become flat, which may cause uneven contrast and display unevenness.

  By providing the step 32s, when the amount of the remaining resin protrusion of the gate corresponding portion 32g is less than the height of the step 32s, the surface of the frame covering portion 47 is maintained flat when the frame covering portion 47 is formed. Display characteristics can be improved. The step is 0.2 mm.

  The curved surface portion 31 includes an outer peripheral end surface 31 t formed in a direction intersecting the holding portion 32 at the boundary with the holding portion 32. Further, the outer peripheral end surface 31t is expanded outward on the holding portion 32 side compared to the curved surface portion 31 side. As described above, the thickness of the lens is 2.99 mm, the height of the outer peripheral end surface 31 t is 2.44 mm, and the inclination angle of the outer peripheral end surface 31 t is 5.2 degrees (the holding portion 32 side is compared with the top surface side of the curved surface portion 31. And expanded outward.)

  The operation of the outer peripheral end face 31t will be described. In the present embodiment, a frame body covering portion 47 (see FIG. 11) is formed that covers the frame body portion 40 disposed between the curved surface portions 31 and covers the space between the curved surface portions 31. Since the frame body covering portion 47 is formed of a black resin (for example, a black silicone resin) and covers the space between the curved surface portions 31, the contrast ratio and waterproofness of the display device 1 can be improved.

  When the outer peripheral end surface 31t does not exist (when the curved surface 31 is extended to the holding portion 32 with the curved surface 31 as it is), when the frame body covering portion 47 is formed, the frame body covering portion 47 (black silicone resin) becomes a curved surface portion. There is a risk of climbing to 31. Further, the boundary between the curved surface portion 31 and the frame body covering portion 47 is not clear, and it becomes difficult to control the height and surface flatness of the frame body covering portion 47. There is a possibility that the frame covering portion 47 climbs up to the curved surface portion 31 and blocks light from the inside of the lens (surface-mounted light emitting device 10).

  When the outer peripheral end surface 31t does not exist, an uneven surface is generated on the surface of the frame covering portion 47, and there is a possibility that drainage (especially drainage of rainwater when installed outdoors) cannot be sufficiently performed. Insufficient drainage not only adversely affects the drive circuit 70 and the like disposed inside the housing 50, but also may reduce visibility, such as moisture remaining on the surface of the lens portion 30 (curved surface portion 31). .

  Since display device 1 (lens unit 30) according to the present embodiment has outer peripheral end surface 31t, the above-described problems in display characteristics, reliability, and the like can be solved.

  As described above, in the display device 1 according to the present embodiment, the holding unit 32 of the lens unit 30 includes the resin injection port 34 that is applied to the filling of the synthetic resin and the resin that is formed corresponding to the resin injection port 34. And a discharge port 35. Therefore, the display device 1 can form the filling resin portion 38 easily and with high accuracy.

  Further, the curved surface portion 31 includes an outer peripheral end surface 31t formed in a direction intersecting the holding portion 32 at the boundary with the holding portion 32. Therefore, since the display device 1 regulates the frame body covering portion 47 by the outer peripheral end surface 31t, the frame body covering portion 47 is prevented from overlapping the curved surface portion 31, and the discriminability of the curved surface portion 31 by the frame body covering portion 47 is prevented. (Display accuracy) can be improved.

  In addition, the outer peripheral end surface 31 t has the holding portion 32 side expanded outward with respect to the top surface side of the curved surface portion 31. Therefore, the display device 1 can reliably define the curved surface portion 31 by regulating the frame covering portion 47 with the outer peripheral end surface 31t, thereby further improving the display accuracy. Moreover, when the lens part 30 and the frame part 40 are integrally formed by a two-color molding method, it is possible to improve the mold releasability from the injection mold.

  When injecting the synthetic resin, it is desirable to remove moisture adhering to the surface of the surface-mounted light emitting device 10 and the inner surface of the lens unit 30. This is because the remaining moisture causes bubbles to be generated after the synthetic resin is injected. Therefore, moisture can be evaporated by performing heat treatment. However, if water vapor is sealed between the lens unit 30 and the wiring board 20, moisture cannot be released to the outside, so that moisture adheres again.

  The resin injection port 34 or the resin discharge port 35 is applied to the evaporation of moisture attached to the surface mount light emitting device 10 and the lens unit 30. Therefore, moisture can be discharged to the outside from the resin inlet 34 and the resin outlet 35 before filling with the synthetic resin. That is, since moisture that causes bubbles to be generated can be removed, the bubbles in the filled resin portion 38 are further reduced. In addition, since the moisture from the synthetic resin can be evaporated by the resin injection port 34 or the resin discharge port 35, it is possible to prevent damage to the element such as peeling of the filling resin portion 38.

  After the wiring substrate 20 is attached to the housing 50, heat treatment is performed at 150 ° C. for 1 hour in order to evaporate the moisture. In addition, what is evaporated is not limited to only moisture, and for example, an organic solvent is also evaporated.

Next, based on FIG. 6 and FIG. 7, the Example of the lens part 30 shown in FIG. 5 is demonstrated.

FIGS. 6A and 6B are explanatory views for explaining the first embodiment of the lens unit, in which FIG. 6A is a plan view, FIG. 6B is a cross-sectional view taken along arrows BB in FIG. It is sectional drawing in CC of CC. 7A and 7B are explanatory views for explaining a lens unit of Example 2. FIG. 7A is a plan view, FIG. 7B is a cross-sectional view taken along arrows BB in FIG. It is sectional drawing in CC of CC.

  The holding unit 32 includes a water evaporation port 39 that is applied to evaporation of water attached to the surface mount light emitting device 10 and the lens unit 30. Therefore, before filling with the synthetic resin, moisture can be discharged from the moisture evaporation port 39 to the outside. That is, since moisture that causes bubbles to be generated can be removed, the bubbles in the filled resin portion 38 are further reduced. In addition, since moisture from the synthetic resin can be evaporated by the moisture evaporation port 39, damage to the element such as peeling of the filling resin portion 38 can be prevented.

In the first embodiment illustrated in FIG. 6, a moisture evaporation port 39 is provided between the curved surface portion 31 and the holding portion 32. The plurality of moisture evaporation ports 39 are evenly arranged along the outer periphery of the curved surface portion 31, and the curved surface portion 31 is held by the holding portions 32 between the respective moisture evaporation ports 39. The moisture evaporation port 39 is formed from the outside to the inside of the holding part 32.

  Since the inner side surface 31r is convex toward the wiring board 20, moisture tends to remain in the boundary region between the curved surface portion 31 and the holding portion 32. Therefore, by providing the moisture evaporation port 39 at a location where moisture tends to remain, the moisture can be removed more efficiently.

Moreover, in Example 2 shown in FIG. 7, the moisture evaporation port 39 is arrange | positioned at the level | step difference 32s. The moisture evaporation port 39 is formed from the outside to the inside of the holding part 32.

  Since the inner surface of the step 32s protrudes toward the wiring board 20, moisture tends to remain. Even with the arrangement as in Modification 2, moisture can be removed more efficiently.

  FIG. 8 is an enlarged explanatory view showing, in an enlarged manner, a partial state of a lens array module formed by molding two colors of a lens part and a frame part applied to the display device according to the embodiment of the present invention, (A) is a top view, (B) is sectional drawing in the arrow BB of (A).

  9A and 9B are explanatory views for explaining the entire lens array module shown in FIG. 8, wherein FIG. 9A is a plan view, and FIG. 9B is a perspective view seen from the direction of arrow B in FIG. It is a perspective side view.

  The frame body portion 40 is a lens array module 40m in which the lens portions 30 are arranged in a dot matrix of 8 rows × 8 columns, and the entire matrix constitutes the lens array module 40m. That is, the frame body portion 40 is disposed so as to surround the lens portion 30 and determines the position of the lens portion 30. Further, the lens array module 40m constitutes a lens array 40L by incorporating 64 lens portions 30. Each lens unit 30 is provided with a corresponding surface-mounted light emitting device 10 mounted on the wiring board 20 (see FIG. 10).

  The lens array module 40m is formed by a two-color molding method. Therefore, after the lens portion 30 (primary side) is molded with a translucent resin, the frame body portion 40 (secondary side) can be molded with a black resin, and a highly accurate lens array module 40m can be efficiently manufactured. Can be formed. That is, the lens unit 30 and the frame body unit 40 (lens array module 40m) can be easily formed with high accuracy, and the lens array 40L in which the lens unit 30 is arranged with high accuracy can be formed.

  In the case where the lens portion 30 and the frame body portion 40 are formed separately and the lens portion 30 is bonded to the frame body portion 40 with an adhesive, the adhesive is applied to the resin inlet 34 and the resin outlet 35. There is a risk that it will adhere and cause shape defects. Further, when the adhesive adheres to the resin injection port 34 and the resin discharge port 35, the opening is blocked, and the adhesive cannot be injected / discharged. That is, the amount of resin to be filled is insufficient and the filled resin portion 38 has a defective shape.

  Therefore, the lens array module 40m can be formed with high accuracy and high productivity by forming the lens portion 30 and the frame body portion 40 in two colors. If necessary, the lens part 30 and the frame body part 40 may be formed separately, and the lens part 30 may be fitted into the frame body part 40 and integrated.

  The frame body portion 40 includes a resin reservoir groove 41 that stores the synthetic resin discharged from the resin discharge port 35 when the filling resin portion 38 (see FIG. 10) is formed. Accordingly, the display device 1 can separate the synthetic resin overflowing from the resin discharge port 35 when the filling resin portion 38 is formed from the lens portion 30 and accommodate it in the resin reservoir groove 41. The influence on the characteristics can be prevented.

  The frame portion 40 forming the lens array module 40m has a light shielding property so as to shield the mutually adjacent surface-mounted light emitting device 10 and the filling resin portion 38 from each other, for example, black (carbon black) polycarbonate. It is made of black resin such as resin or black silicone resin. The polycarbonate resin is excellent in transparency, impact resistance, heat resistance, flame retardancy, etc., and therefore can improve weather resistance, and is particularly effective when the display device 1 is installed outdoors. is there.

  The resin reservoir groove 41 may have an optimal dimension that does not overflow the synthetic resin injected to form the filled resin portion 38. For example, the resin reservoir groove 41 has a width of 1 mm and a depth of 1 mm.

  The frame body portion 40 includes a resin reservoir hole 42 formed deeper than the resin reservoir groove 41 and connected to the resin reservoir groove 41. Therefore, even when the synthetic resin forming the filling resin portion 38 is excessively supplied, the display device 1 accommodates the synthetic resin in the resin reservoir hole 42 through the resin reservoir groove 41, so that the synthetic resin is in the lens portion 30. It can be surely prevented that the optical characteristics of (particularly the curved surface portion 31) are damaged.

  The lens array module 40m (frame body portion 40) includes an engagement protrusion 45 on the back surface side that acts as a positioning unit and an engagement unit when attached to the wiring board 20. In the present embodiment, the lens array module 40m (lens array 40L) can be attached to the wiring board 20 as a set of four. In other words, 64 × 4 = 256 surface-mounted light emitting devices 10 and lens units 30 are arranged in the entire display device 1.

  As described above, in the display device 1 according to the present embodiment, the holding unit 32 includes the skirt portion 36 that extends toward the wiring board 20 and contacts the frame body portion 40. Therefore, the display device 1 can easily form the lens portion 30 and the frame body portion 40 with high accuracy, and can easily form the filling resin portion 38 with high accuracy.

  In addition, the skirt portion 36 is expanded outward as the wiring substrate 20 is closer. Therefore, the display device 1 can form the frame body portion 40 and the skirt portion 36 with high accuracy.

  The lens array module 40m (frame body portion 40) includes screw holes 40s for attaching to the wiring board 20. That is, the lens array module 40m is attached to the wiring board 20 with the screws (M2.6).

  The lens array module 40 m (frame body portion 40) includes a through groove 40 h that penetrates the frame body portion 40. The through groove 40h is arranged so as to correspond to a wiring pattern formed on the wiring board 20 (land pattern corresponding to the through hole 21 (see FIG. 10) through which both sides of the wiring board 20 are interconnected). Yes. Therefore, since the wiring pattern formed on the wiring board 20 is recognized with high accuracy through the through groove 40h, the lens array module 40m is aligned with respect to the wiring board 20 with high accuracy.

  The synthetic resin forming the filling resin portion 38 is similarly filled in the through groove 40h to form the groove filling resin portion 38h (see FIG. 10), so that the wiring board 20 is not exposed, and there is a problem in waterproofing. Does not occur.

  FIG. 10 shows a manufacturing process of a display device according to an embodiment of the present invention, in which a wiring board to which a lens array module is attached is attached to a housing, and a synthetic resin is filled between the surface mount light emitting device and the lens portion. It is explanatory drawing explaining the state which formed the filling resin part, (A) is a typical side view which shows a side surface state typically, (B) is an expanded section which expands and shows the area | region of the code | symbol B of (A) FIG.

  First, the surface mount light emitting device 10 is mounted on the front surface (display surface 20 d) of the wiring substrate 20, and the drive circuit 70 is mounted on the back surface 20 c of the wiring substrate 20. Thereafter, the surface mount light emitting device 10 and the lens unit 30 are made to correspond to each other, and the lens array module 40m (lens array 40L) is attached to the display surface 20d.

  The frame part 40 is a lens array module 40m (lens array 40L) in which the lens parts 30 are arranged in a dot matrix, and the lens array module 40m (lens array 40L) is attached to the wiring board 20 as an attachment unit. . Therefore, the display device 1 can secure the strength of the frame body portion 40 and can secure the positional accuracy of the lens portion 30 with respect to the surface-mounted light emitting device 10 to improve the reliability and display accuracy.

  That is, since the display surface of the display device 1 is divided and attached to the wiring substrate 20 by a plurality of (for example, the above-described four-sheet set) lens array modules 40m (lens array 40L), the surface mount type light emitting device for the wiring substrate 20 is provided. 10 and the lens unit 30 can be prevented from being misaligned, position accuracy can be ensured, and display accuracy can be improved.

  As described above, the display device 1 includes the drive circuit 70 that drives the surface-mounted light-emitting device 10, and the drive circuit 70 is on the opposite side of the wiring substrate 20 from the display surface 20 d on which the surface-mounted light-emitting device 10 is disposed. It is mounted on the back surface 20c. Therefore, the display device 1 can easily mount (connect) the driving circuit 70 that drives the surface-mounted light-emitting device 10 and can improve the reliability. Note that the surface-mounted light-emitting device 10 disposed on the display surface 20d of the wiring board 20 and the drive circuit 70 disposed on the back surface 20c are connected to each other via a through hole 21 formed in the wiring board 20 in advance. The

  Since the wiring patterns on both surfaces of the wiring substrate 20 are connected via the through holes 21, the surface-mounted light emitting device 10 disposed on the display surface 20d and the drive circuit 70 disposed on the back surface 20c are compact. Connected to.

  As described above, the lens array module 40m (lens array 40L) is fixed to the wiring board 20 with screws, or is fixed by an adhesive (for example, silicone resin) applied to the wiring board 20. The lens array module 40m is screwed to the housing 50.

  A display device 1 according to the present embodiment includes a surface-mounted light-emitting device 10 that is surface-mounted on a wiring board 20, a lens unit 30 that is disposed to face the surface-mounted light-emitting device 10, and the periphery of the lens unit 30. A frame body portion 40 that is disposed around the surface portion, and a filling resin portion 38 that is formed by filling a synthetic resin between the surface-mounted light emitting device 10 and the lens portion 30. Contains a light-sensitive resin and an antifoaming agent 38p.

  Accordingly, the bubbles in the filling resin portion 38 are reduced by the antifoaming agent 38p. As a result, light scattering caused by bubbles can be prevented, and chromaticity spots and luminance spots can be suppressed. Further, since the bubbles in the filling resin portion 38 are reduced, it is possible to prevent peeling between the filling resin portion 38 and the lens portion 30 or the surface-mounted light emitting device 10 generated by the bubbles, so that the reliability of the display device can be improved. .

  In addition, the display device 1 improves the environmental resistance (reliability) of the surface-mounted light-emitting device 10, removes the air layer between the surface-mounted light-emitting device 10 and the lens unit 30, and transmits light ( The light intensity at the front of the display device 1, that is, display characteristics) can be improved. The synthetic resin supplied excessively when forming the filling resin portion 38 flows out into the resin retaining groove 41 to form the groove filling resin portion 38r.

  In the present embodiment, the synthetic resin is formed by dispersing silicone resin particles (antifoaming agent 38p) in a liquid silicone resin (translucent resin). The mixing ratio of the synthetic resin is, for example, silicone resin particles: liquid silicone resin = 60: 100 (weight ratio).

  With the antifoaming agent 38p, bubbles generated in the synthetic resin can be destabilized and broken. The antifoaming agent 38p is different from the light diffusing agent dispersed in the translucent resin. The light diffusing agent is a spherical particle that diffuses light, and has a particle diameter of 20 μm to 100 μm. The antifoaming agent 38p is not limited to a spherical shape, and a particle having a particle size smaller than that of the light diffusing agent is used.

  That is, the diameter of the antifoaming agent particles is 0.1 μm to 20 μm. Therefore, if the diameter of the particles is 0.1 μm or more, the bubbles for peeling the synthetic resin can be surely eliminated. Moreover, when the diameter of the particles is 20 μm or less, the nozzle of the injector can be prevented from being clogged when the synthetic resin is injected.

  The antifoaming agent 38p is preferably composed of particles that do not dissolve in the sealing resin 8. For example, resin particles, inorganic substance particles, or a mixed particle group thereof.

  As described above, the antifoaming agent 38p is made of resin particles. Therefore, by using resin particles that are not dissolved in the light-transmitting resin, the reliability of the display device can be improved without reducing the function of the synthetic resin.

  The above resin particles are epoxy resin particles, acrylic resin particles, imide resin particles, phenol resin particles, silicone resin particles, norbornene resin particles, polymethylpentene resin particles, amorphous nylon resin particles, polystyrene resin particles, polyarylate resin. And at least one selected from particles, polycarbonate resin particles, epoxy-modified silicone resin particles, and organic-modified silicone resin particles. Therefore, the filling resin part 38 according to the characteristic or use of the display apparatus 1 can be provided by using the resin particle optimal for an antifoamer.

  Further, the antifoaming agent 38p may be composed of inorganic particles. Therefore, by using resin particles that are not dissolved in the light-transmitting resin, the reliability of the display device can be improved without reducing the function of the synthetic resin.

  The inorganic substance particles include at least one selected from silica particles, quartz particles, glass particles, calcium carbonate particles, barium sulfate particles, and aluminum hydroxide particles. Therefore, the filling resin part 38 according to the characteristic or use of the display apparatus 1 can be provided by using the inorganic substance particle | grains optimal for an antifoamer. In particular, the inorganic particles have irregular shapes and sharp corners. Therefore, when inorganic substance particles are used as the antifoaming agent 38p, bubbles can be broken efficiently.

  Further, it is desirable that the antifoaming agent 38p and the translucent resin have substantially the same refractive index. Therefore, since the light transmittance in the filling resin portion 38 can be improved, the light extraction efficiency from the surface mount light emitting device 10 can be increased. Although the refractive index of the material used for this Embodiment was 1.43 or 1.51, it is not limited to this.

Moreover, it is desirable that the antifoaming agent and the translucent resin have substantially the same linear expansion coefficient. Therefore, peeling between the antifoaming agent and the translucent resin due to heat cycle can be prevented, and the reliability of the present invention can be improved. The linear expansion coefficient of the material used in the present embodiment was 25 * 10 ⁻⁵ / ° C., but is not limited thereto.

  Further, it is desirable that the antifoaming agent 38p and the translucent resin are made of the same synthetic resin material. Therefore, it is suitable for reducing the difference in refractive index and linear expansion coefficient between the antifoaming agent 38p and the translucent resin.

  Note that different synthetic resin materials may be used for the antifoaming agent 38p and the translucent resin. Even in such a case, a synthetic resin material to be applied to the antifoaming agent 38p and the translucent resin should be appropriately selected so that the difference in refractive index between the antifoaming agent 38p and the translucent resin becomes small. That's fine.

  As described with reference to FIG. 5, the filling resin portion 38 is formed by injecting a synthetic resin from the resin injection port 34 using an injection machine (potting). Since the resin discharge port 35 is disposed at a position facing the resin injection port 34, the synthetic resin can be filled while venting air.

  Since the synthetic resin injected from the resin injection port 34 in the injection time of about 1 second overflowed (discharged) from the resin discharge port 35, the synthetic resin injection time was set to about 1 second. The synthetic resin discharged from the resin discharge port 35 can be absorbed by the resin reservoir groove 41 and the resin reservoir hole 42. Therefore, excess synthetic resin does not adhere to the lens portion 30 (curved surface portion 31).

  The synthetic resin forming the filling resin portion 38 is required to have good adhesion to the lens portion 30, the surface mount light emitting device 10, the wiring substrate 20, and the frame body portion 40. Specifically, an epoxy resin, a silicone resin, etc. are suitable. In order to further improve the adhesion, a primer is applied to the surface of the wiring board 20 (display surface 20d), the surface of the package part 12 of the surface mount light emitting device 10, the frame part 40, etc., and then a synthetic resin is injected. Adhesion is improved.

  The synthetic resin used when the filling resin portion 38 is formed is also filled in the through groove 40 h formed in the frame body portion 40. It is injected in the same manner as the synthetic resin is injected into the resin injection port 34. Therefore, the groove filling resin portion 38h is formed in the through groove 40h.

  For example, the injected synthetic resin is allowed to stand at room temperature for 24 hours to cure the resin and remove bubbles. Then, the filling resin part 38 is formed by performing a heat treatment as a curing condition at 80 ° C. for 45 minutes to cure.

  As described above, the inner side surface 31 r (see FIG. 5) of the curved surface portion 31 facing the wiring substrate 20 is convex toward the wiring substrate 20. Therefore, bubbles remaining between the surface-mounted light emitting device 10 and the curved surface portion 31 can be further reduced.

  Although the case where the drive circuit 70 is arranged on the back surface 20c is shown, the drive circuit 70 can also be arranged on the display surface 20d if the layout is changed. At that time, it is desirable that the drive circuit 70 be arranged in only one of them.

  That is, the display device 1 according to the present invention includes a drive circuit 70 that drives the surface-mounted light-emitting device 10, and the drive circuit 70 is the display surface 20 d of the wiring board 20 on which the surface-mounted light-emitting device 10 is disposed or the opposite. It is desirable that it is mounted only on one side of the rear surface 20c on the side.

  Therefore, in the display device 1 according to the present invention, when the drive circuit 70 is disposed only on the display surface 20d of the wiring board 20, the surface mount light emitting device 10 and the driving circuit 70 can be simultaneously mounted on the wiring board 20. Thus, productivity can be improved. Further, in the display device 1 according to the present invention, when the drive circuit 70 is disposed only on the back surface 20c of the wiring substrate 20, the wiring substrate 20 is formed in accordance with the outer shape of the display device 1, and the surface mount light emitting device 10 is formed. It can be arranged in accordance with the outer shape of the display device 1.

  FIG. 11 is an explanatory diagram for explaining a state in which a frame body covering portion is formed in a manufacturing process of a display device according to an embodiment of the present invention, and (A) is a schematic side view schematically showing a side surface state. (B) is an enlarged cross-sectional view showing a region indicated by reference sign B in (A).

  After the filling resin portion 38 is formed, a frame body covering portion 47 that covers the frame body portion 40 is formed. That is, the display device 1 includes a frame body covering portion 47 that covers the frame body portion 40. Therefore, since the frame body covering portion 47 covers the frame body portion 40 in the display device 1, it is possible to cover the boundary between the lens portion 30 and the frame body portion 40. 31) The distinction between them can be clarified to improve display accuracy, and the environmental resistance (waterproofness) can be improved.

  The material applied to the frame covering portion 47 is required to have good adhesion to the lens portion 30, the frame portion 40, the housing 50, and the like. Further, in order to protect the drive circuit 70, flexibility and weather resistance are required. Therefore, for example, at least one selected from an epoxy resin, a urethane resin, and a silicone resin can be applied as the material of the frame body covering portion 47. Further, in order to improve the contrast, the resin forming the frame covering portion 47 may contain a dark coloring dye or coloring pigment such as black (carbon black). Furthermore, you may contain a heat conductive member in order to improve heat conduction. In the present embodiment, the frame cover 47 is formed of a black (carbon black) -containing silicone resin.

  Further, in the present embodiment, the frame covering portion 47 covers the holding portion 32. Therefore, in the display device 1, since the frame body covering portion 47 covers both the frame body portion 40 and the holding portion 32, the distinction between the lens portions 30 (curved surface portions 31) is further clarified and display accuracy is further increased. The environmental resistance can be further improved.

  The coating resin forming the frame body covering portion 47 is supplied between the lens portions 30 (outer peripheral end surfaces 31t) so as to cover the holding portion 32 and the frame body portion 40. After filling the coating resin between the outer peripheral end faces 31t, for example, the coating resin is cured by being left at room temperature for 24 hours. Thereafter, the frame covering portion 47 is formed by curing by heating at 80 ° C. for 45 minutes as a curing condition.

  Since the frame covering portion 47 covers the holding portion 32, it is possible to close the resin injection port 34, the resin discharge port 35, and the moisture evaporation port 39. Therefore, for example, water can be prevented from entering a pinhole or the like that is accidentally formed in the filling resin portion 38. In addition, since the filling resin portion 38 and the frame covering portion 47 are formed so as to overlap each other, accidental pinholes can be closed, so that waterproofness is improved.

  As described above, in the display device 1 according to the present embodiment, the wiring board 20 on which the surface mount light emitting device 10, the drive circuit 70, and the lens array module 40m (lens array 40L) are mounted is attached to the housing 50. .

  The casing 50 (external case) preferably has excellent adhesion to a coating resin (for example, a silicone resin) that forms the frame covering portion 47. As a material of the housing 50, polycarbonate resin, ABS resin, epoxy resin, phenol resin, and the like are preferable because of ease of molding. In the present embodiment, the housing 50 is made of polycarbonate resin.

  The housing 50 mechanically attaches the surface-mounted light emitting device 10 arranged in a matrix on the display surface 20d of the wiring board 20, the drive circuit 70 mounted on the back surface 20c of the wiring board 20, and the wiring board 20 from the outside. It is a member that protects and can be formed in a desired size.

  12A and 12B are explanatory diagrams for explaining a state in which the eaves portion is attached in the manufacturing process of the display device according to the embodiment of the present invention. FIG. 12A is a schematic side view schematically showing a side surface state. ) Is an enlarged cross-sectional view showing a region indicated by reference numeral B in FIG.

  An eaves portion 60 is arranged corresponding to each surface-mounted light emitting device 10 (lens portion 30 and frame body portion 40). The eaves part 60 is arranged corresponding to the row direction of the frame body part 40 (lens array module 40 m) and the frame body cover part 47. That is, as shown in FIG. 1, 16 eaves portions 60 are arranged corresponding to 16 rows of the surface-mounted light-emitting device 10 included in the display device 1. The eaves part 60 is arranged in the row direction in order to prevent the visibility from being lowered by irradiation light (external light) from the upper part in the vertical direction such as sunlight. In addition, it is preferable to color the eaves 60 with a black color or the like in order to improve the light shielding efficiency, and a black (carbon black) polycarbonate resin can be applied.

  The height H1 of the eaves part 60 is 10 mm, and the height H2 of the eaves part 60 arranged at the uppermost stage in the vertical direction is 12.5 mm. The height of the eaves part 60 is designed so as to secure 10 degrees as the viewing angle in the vertical direction and to suppress the direct application of sunlight directly to the surface mount light emitting device 10 as much as possible. Therefore, the display device 1 can have both visibility and light shielding properties.

  Further, the eaves part 60 is provided with a drainage part 61 having a height of 1 mm and a width of 4 mm between the casing 50 and the frame cover part 47 for draining water. The eaves portion 60 is attached to the housing 50 with screws (not shown). Specifically, the eaves portion 60 is fixed to the housing 50 with screws from the back surface 20 c side of the wiring board 20 through the frame body portion 40.

  Polycarbonate is a resin material that exhibits high physical properties in terms of transparency, impact resistance, heat resistance, flame retardancy, and the like. Moreover, it is cheaper than the superiority of physical properties, and in this embodiment, as described above, various kinds of black (carbon black) polycarbonate resin are applied to the frame body portion 40, the casing 50, the eaves portion 60, and the like. Below, the modification with respect to a polycarbonate is demonstrated.

  An ultraviolet reflector may be mixed with polycarbonate. In this case, it is possible to prevent deterioration of members (the frame body portion 40, the casing 50, the eaves portion 60, etc.) due to ultraviolet rays contained in sunlight, and the reliability of the display device 1 can be improved.

  The ultraviolet reflector-containing resin is formed by blending and dispersing an ultraviolet reflector in a polycarbonate resin or a silicone resin as a translucent resin material to form a resin. As the ultraviolet reflector, fine powder of silicon oxide and fine powder of metal oxide such as aluminum oxide, zinc oxide, titanium oxide, magnesium oxide can be applied.

An infrared reflector may be further applied to the polycarbonate. As the infrared reflective member, heating the titanium hydroxide in tetravalent in the titanium salt solution, to form a Ti0 ₂ powder by passing it through a sieve (sieve). Mixed ti0 ₂ powder in a silicone resin to obtain a slurry comprising an infrared reflecting member containing resin by stirring. An infrared reflecting member can be applied to the housing 50, the wiring substrate 20, and the eaves portion 60 except for the opening of the surface mount light emitting device 10.

DESCRIPTION OF SYMBOLS 1 Display apparatus 10 Surface mount type light-emitting device 11 External terminal 12 Package part 13 Recessed part 14b, 14g, 14r Semiconductor light emitting element 15 Translucent resin part 16 Black part 20 Wiring board 20d Display surface 20c Back surface 21 Through-hole 30 Lens part 31 Curved surface Portion 31r inner surface 31t outer peripheral end surface 32 holding portion 32g gate corresponding portion 32s step 34 resin injection port 35 resin discharge port 36 skirt portion 36s surface 38 filling resin portion 38p defoaming agent 39 moisture evaporation port 40 frame body portion 40L lens array 40m lens Array module 41 Resin reservoir groove 42 Resin reservoir hole 45 Engagement protrusion 47 Frame body cover part 50 Case 51 Engagement part 60 Eave part 61 Water drain part 70 Drive circuit

Claims (11)

A display comprising a surface-mounted light-emitting device that is surface-mounted on a wiring board, a lens unit that is disposed to face the surface-mounted light-emitting device, and a frame body that is disposed around the lens unit. A device,
Between the surface-mounted light emitting device and the lens unit, a filled resin portion formed by filling a synthetic resin,
The synthetic resin contains a translucent resin and an antifoaming agent ,
The lens portion includes a curved surface portion having a curved surface, and a holding portion that extends from the curved surface portion to the frame body portion and holds the curved surface portion,
The holding portion includes a resin injection port applied to the filling of the synthetic resin, a resin discharge port formed to face the resin injection port, and moisture attached to the surface mount light emitting device and the lens unit. A display device comprising a water evaporation port applied to evaporation of the water . The display device according to claim 1 ,
The display device, wherein the resin injection port or the resin discharge port is applied to evaporation of moisture attached to the surface-mounted light-emitting device and the lens unit. The display device according to claim 1 or 2 ,
The display device, wherein an inner side surface of the curved surface portion facing the wiring board is convex toward the wiring board. A display device according to any one of claims 1 to 3 ,
The diameter of the particle | grains of the said antifoamer is 0.1 micrometer-20 micrometers, The display apparatus characterized by these. A display device according to any one of claims 1 to 4 ,
The antifoaming agent and the translucent resin have substantially the same refractive index. A display device according to any one of claims 1 to 5 ,
The defoaming agent and the translucent resin have substantially the same linear expansion coefficient. A display device according to any one of claims 1 to 6 ,
The antifoaming agent and the translucent resin are made of a similar synthetic resin material. A display device according to any one of claims 1 to 7 ,
The display device, wherein the antifoaming agent comprises resin particles. The display device according to claim 8 ,
The resin particles are epoxy resin particles, acrylic resin particles, imide resin particles, phenol resin particles, silicone resin particles, norbornene resin particles, polymethylpentene resin particles, amorphous nylon resin particles, polystyrene resin particles, polyarylate resin particles. And at least one selected from polycarbonate resin particles, epoxy-modified silicone resin particles, and organic-modified silicone resin particles. A display device according to any one of claims 1 to 6 ,
The display device, wherein the antifoaming agent is composed of inorganic substance particles. The display device according to claim 10 ,
The display device, wherein the inorganic substance particles include at least one selected from silica particles, quartz particles, glass particles, calcium carbonate particles, barium sulfate particles, and aluminum hydroxide particles.

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