JP2007172872A - Lighting system, and image display device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting system with a simple structure of a reflecting member and with excellent uniformity of light without having unevenness of luminance, and to provide an image display device using the same. <P>SOLUTION: A light-emitting diode 2 is arranged on a mounting part 14 of a wiring board 1 having a wiring layer 11 on a support substrate 13 through an insulating layer 12, and the reflecting member 3 to reflect emitted light from the light-emitting diode 2 is installed on the wiring board 1. An opening corresponding to the mounting part 14 is provided at the bottom part of a taper portion 31 of the reflecting member with uniform thickness. 4 is a transparent resin to cover the mounting part 14, and 32 is a gap between the reflecting member 3 and the wiring board 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an illumination device using a light emitting diode and an image display device using the illumination device as a backlight of a non-light emitting display panel.

  With the recent improvement in luminous efficiency of light emitting diodes, the light sources of various lighting devices have been replaced with light emitting diodes from lamps and fluorescent lamps. This is because the light emitting diode has many features such as being small, capable of being multicolored, easy to control, and having low power consumption. However, in lighting applications that require high light output, the light output of one light-emitting diode is still insufficient, and a plurality of light-emitting diodes are arranged and used as a lighting device.

  For example, in a liquid crystal display, as described in Patent Document 1 below, a plurality of packages in which light emitting diodes emitting red, green, and blue light are sealed with a transparent resin are arranged on a wiring board, and the board is white. A lighting device covered with a reflecting member is used as a backlight.

In addition, as described in Patent Document 2 below, a lighting device in which a plurality of packages in which a light emitting diode and a phosphor are sealed with a white reflective mold and a transparent resin is disposed is combined with an optical member as a backlight. Used.
JP 2004-319458 A JP 2002-162626 A

  However, when the light emitting diode is sealed with a transparent resin as in Patent Document 1, the light intensity directly above the package becomes strong, and it is difficult to obtain light uniformity. Further, when using a white package as in Patent Document 2, the uniformity of light can be improved by increasing the size of the package, but the problem of warping of the white package occurs with the increase in size of the package, It is difficult to mount light emitting diodes.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an illuminating device that has a simple structure, is suitable for upsizing, and has no luminance unevenness, and a display device using the illuminating device.

  The lighting device according to the present invention is a lighting device having a plurality of light emitting diodes, a wiring board, a transparent resin, and a reflecting member, wherein the plurality of light emitting diodes are mounted on a plurality of mounting portions of the wiring board, and the reflecting member Is a uniform thickness, has a tapered shape, has an opening at the bottom of the tapered shape, the reflective member is disposed on the wiring board, and the transparent resin is at least of the mounting portion It arrange | positions so that a part and at least one part of the said reflection member may be covered.

  The reflective member has a tapered shape formed by bending, pressing, or drilling. The reflective member is disposed on the wiring board and has a gap between the wiring board and the reflective member. Further, the transparent resin is composed of two types of transparent resin that covers the periphery of the light emitting diode and another transparent resin that covers the periphery of the transparent resin.

  The plurality of light emitting diodes include a light emitting diode that emits light in a red wavelength region, a light emitting diode that emits light in a green wavelength region, and a light emitting diode that emits light in a blue region. In addition, one or more light emitting diodes that emit light in the respective wavelength regions of red, blue, and green are mounted on each mounting portion. Further, only one of the light emitting diodes that emit light in the wavelength regions of red, blue, and green is mounted on each mounting portion. A plurality of light emitting diodes mounted on each mounting portion emit light in the blue or ultraviolet wavelength region, and a phosphor that emits light when excited at these wavelengths is disposed around the light emitting diode.

  The plurality of mounting portions are arranged in a plurality of rows in an arbitrary direction on the wiring board, and the mounting portions in each row are covered with a series of transparent resins. The wiring board is formed of a support substrate, an insulating layer, and a lead frame, the lead frame has a convex portion, and the convex portion is in contact with the reflecting member. Further, an adhesive member is provided between the reflective member and the wiring board. The reflecting member has a large number of fine cavities. Further, the thickness of the reflecting member is 0.5 mm or less, and the average reflectance is 95% or more with respect to the emission wavelength of the light emitting diode or the emission wavelength of the excited phosphor.

  The image display device according to the present invention includes a backlight having one or more illumination devices, an optical member group for controlling uniformity and directivity of light from the backlight, and a plurality of pixels. And a non-light emitting display panel that controls reflection and transmission of light.

  The backlight includes a light guide that allows light from the illumination device to enter from a side incident surface and exit to the upper surface. Further, the backlight has a plurality of sets of the lighting device and the light guide, and arranges them in a tile shape.

  As described above, the present invention can realize an illumination device with high uniformity of light without uneven brightness and an image display device using the illumination device.

  Embodiments of an illumination device according to the present invention and an image display device using the same will be described below in detail with reference to the drawings.

  FIG. 1 is a perspective view for explaining a lighting device according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line A-A ′, FIG. 3 is a top view, and FIG. In this embodiment, the wiring board 1, the plurality of light emitting diodes 2, the reflecting member 3, and the transparent resin 4 are used.

  In FIG. 2, the wiring substrate 1 includes a wiring layer 11, an insulating layer 12, and a support substrate 13, and the plurality of light emitting diodes 2 are mounted on the wiring layer 11 of the mounting portion 14. The mounting portion 14 of the wiring board 1 and a part of the surface of the reflecting member 3 (the surface of the tapered portion 31 of the reflecting member 3 in FIG. 2) are covered with the transparent resin 4. Here, the mounting portion 14 is defined on the wiring substrate 1 as the inside of the opening of the bottom surface of the tapered portion 31 of the reflecting member 3.

  In FIG. 3, four light emitting diodes 2R, 2G1, 2G2, and 2B are mounted on each mounting portion 14, and emit light in the red, green, green, and blue wavelength regions, respectively. The mounting parts are connected so that light emitting diodes of the same color are electrically connected in series in the left-right direction (the direction of FIG. 1A-A ′).

  In FIG. 4, each light emitting diode 2 can be made to emit light by applying a voltage so that a current flows in the forward direction at both ends of each column of light emitting diodes (from right to left in FIG. 4). At this time, the light emission amount of the light emitting diode 2 can be freely modulated by controlling the voltage, current, voltage application time, and the like.

  In this embodiment, each mounting portion 14 is provided with one or more light emitting diodes (two for green) each emitting light in the wavelength regions of red, green, and blue, which are the three primary colors of light. By emitting light, white light can be obtained by mixing the colors.

  Next, the manufacturing method of the illuminating device which concerns on this invention is demonstrated below using FIG. First, the plurality of light emitting diodes 2 are mounted on the mounting portion 14 of the wiring board 1. Next, a thin plate or sheet-like member is processed into a shape having a plurality of tapered portions 31 and having an opening at the bottom of the tapered portion 31 by a combination of punching, bending, pressing, or the like. And is disposed on the wiring board 1. Then, a predetermined amount of the transparent resin 4 before curing is injected into the tapered portion 31 by dispensing, potting or the like, and then the transparent resin 4 is cured. Furthermore, the lighting device according to the present invention can be manufactured by electrically connecting the control circuit to the wiring layer 11 of the wiring board 1. Further, a protection circuit using a Zener diode or the like may be incorporated in the wiring board 1 or an external control circuit in order to protect the light emitting diode 2.

  In the present embodiment, a part of the light emitted from the light emitting diode 2 directly reaches the surface of the transparent resin 4, and some light reaches the surface of the transparent resin 4 after being reflected by the reflecting member 3. The light reaching the surface of the transparent resin 4 may be emitted to the air layer depending on the incident angle, or may be reflected and returned to the tapered portion 31 of the reflecting member 3. Light having a large incident angle is repeatedly reflected by the reflecting member 3 and the surface of the transparent resin 4, reaches the outer periphery of the transparent resin 4 farther away from the light emitting diode 2, and can be emitted from there to the air layer. is there. Therefore, a portion substantially sealed by the transparent resin 4 can be regarded as one surface light source, and an illumination device that can uniformly illuminate the in-plane light intensity at a position closer to the illumination device can be realized. .

  In the present embodiment, the reflective member 3 can be manufactured by combining a sheet-like thin member with a combination of punching, bending, pressing, and the like, so that the arbitrarily shaped reflective member 3 can be easily formed. Is possible. Moreover, it can respond easily to the enlargement of the reflection member 3 with this processing method. Further, since the tapered portion 31 is shallow and a shape having a large opening area on the upper surface can be taken, if the mounting portion 14 and the tapered portion 31 of the reflecting member 3 are sealed with the transparent resin 4, one mounting portion is made larger. A surface light source can be used, and an illuminating device that can illuminate with a uniform in-plane light intensity at a position closer to the illuminating device can be realized.

  Furthermore, if the reflecting member 3 is manufactured by the above-described processing method, the thickness of the reflecting member 3 can be reduced by making the tapered portion 31 and the non-tapered portion equal to the thickness of the original sheet member. Even if a reflective member having a deep taper shape is manufactured, a lightweight lighting device can be obtained without increasing the weight of the reflective member.

  In this embodiment, the heat generated in the light emitting diode 2 is radiated from the support substrate 13 on the back surface of the wiring board 1 to the air, and the gap 32 between the wiring board 1 and the reflecting member 3 is used. Heat can be exhausted from the surface, and in addition to the effects described above, there is an effect of suppressing a decrease in light emission efficiency associated with a temperature rise of the light emitting diode 2 and obtaining a brighter illumination device. Furthermore, it is preferable to arrange wirings and the like required by the control circuit or the like in the gap 32 so that the wirings and the like do not hinder light emission of the lighting device.

  Next, important members and related structures among the members constituting the lighting device of the present invention will be described in detail. The wiring board 1 is a printed board or a metal base board in which glass / epoxy, copper, aluminum or the like is used as a support board 13 and a wiring layer 11 such as a copper foil is bonded through an insulating layer 12. Further, a metal wiring layer 11 is formed on a ceramic support substrate 13 such as aluminum nitride, silicon nitride, or alumina by printing or sputtering (the insulating layer 12 also serves as the support substrate 13). Also, a lead frame wiring layer 11 made of copper, copper alloy, 42 alloy or the like is bonded to a support substrate 13 such as a metal plate via an insulating layer 12.

  In addition, the wiring board 1 may be one in which a wiring having both a wiring layer 11 and an insulating layer 12 such as FPC is bonded to a support substrate 13 such as a metal plate. Further, when using a lead frame or the like for the wiring layer 11, the thickness of the mounting portion of the light-emitting diode 2 is increased, so that the so-called lead frame field is used to improve the light utilization efficiency and It is possible to improve heat dissipation. In addition, these wiring boards 1 may be constituted by one piece per lighting device, or the wiring board 1 is arranged on a tile or a strip as a base member such as a housing, and these are electrically connected. You may use as one wiring board 1 by connecting to. Further, the wiring layer 11 used in the wiring substrate 1 may be subjected to gold plating or silver plating to improve mounting reliability and light reflectance. Further, the surface of the wiring layer 11 may be covered with a protective film such as a resist. In addition, heat dissipation may be actively promoted by attaching a heat sink, heat pipe, fan, fin, or the like to the back surface of the wiring board 1.

  The light emission color of the light emitting diode 2 can be changed by the composition, structure, manufacturing method, and the like of the semiconductor layer of the light emitting diode, and an arbitrary light emission color can be selected from the entire visible light range. In addition, light emitting diodes of the respective emission colors can be combined and mixed to obtain an arbitrary emission color. For example, white can be obtained by mixing red, green, and blue light emission.

  In addition, as shown in FIG. 6, the phosphor 5 is arranged around the light emitting diode 2, and the light emission of the light emitting diode 2 and the light emission of the phosphor 5 are mixed, for example, the blue phosphor of the light emitting diode 2 It is also possible to mix the yellow of 5 to emit white light, or to mix the red, green and blue of the phosphor 5 with the ultraviolet light of the light emitting diode 2 to emit white light. These can be arbitrarily selected and combined depending on the application of the lighting device.

  In general, the efficiency of light-emitting diodes that emit green light is lower than the efficiency of light-emitting diodes that emit red and blue light. By mounting red, green, green, and blue as a set, each color can be mixed efficiently. White can be reproduced. In FIG. 6, the transparent resin 4 is disposed on the phosphor 5, but it goes without saying that only the phosphor 5 may be used.

  Further, the mounting form of the light emitting diode 2 is different depending on the arrangement of the two electrodes of the anode and the cathode, and as shown in FIG. As shown in FIG. 7C, there are an arrangement in which two electrodes, anode and cathode, are provided on the upper surface, and an arrangement in which two electrodes, anode and cathode, are provided on the lower surface, as shown in FIG. 7C. is there. Also, two or more electrodes can be used depending on the size and type of the light emitting diode 2. Hereinafter, in the description of the present invention, the embodiment shown in FIG. 7A including other examples will be described as an example. Unless otherwise specified, any of the mounting forms shown in FIGS. 7B and 7C may be used. A light emitting diode of the mounting form may be used.

  The reflecting member 3 is a sheet-like member formed by using bending, punching, deformation by pressing, or the like, and its thickness is 0.5 mm or less from the viewpoint of moldability. preferable.

  At that time, the cross-sectional shape of the reflecting member 3 needs to be composed of only a linear tapered portion and a flat non-tapered portion as shown in the schematic cross-sectional shape diagram of the reflecting member 3 shown in FIG. Alternatively, a desired light emission distribution may be obtained by combining arbitrary shapes. For example, as shown in FIG. 8B, the corners of the tapered portion and the non-tapered portion are rounded, or as shown in FIGS. 8C and 8D, a part of a curve such as a circle or a parabola is tapered. Used for condensing or diverging light, or as shown in FIGS. 8E and 8F, adjacent taper portions are connected to each other, and the upper surface opening of the taper portion is taken as wide as possible.

  Thus, the uniformity of light can be further improved by forming the reflecting member 3 in a shape combining arbitrary curves and straight lines. Moreover, the opening shape of the upper surface and the bottom surface of the tapered portion may be opened in a circular shape, an elliptical rectangular shape, or any other shape (not shown). In the following examples, a description will be given using a reflecting member combined with a straight line and a tapered portion thereof, but an illuminating device may be formed using any cross-sectional shape. The reflecting member 3 preferably has a high reflectance over the entire visible light region, heat resistance and light resistance (UV resistance), low moisture permeability, and low heat shrinkage.

  Also, a large number of minute cavities are provided inside the reflecting member 3, utilizing multiple reflection at the interface, white pigment, fine particles added to the resin, and a highly reflective metal film deposited on the surface, sputtering, printing, etc. A material with a high reflectance obtained by using the method described above, a material with a dielectric multilayer film on the surface, or the like may be used. From the viewpoint of light utilization efficiency, it is preferable that the reflectance of the reflecting member 3 is 95% or more with respect to the emission wavelength of the light emitting diode or the emission wavelength of the phosphor excited by the light emitting diode.

  In particular, when the illumination device according to the present invention is used for backlighting of an image display device, the amount of light returning from the optical member group existing between the illumination device and the display panel is large, and between the reflecting member 3 and the optical member group. And repeat the reflection many times. Therefore, the light reflectance of the reflecting member 3 greatly affects the brightness of the image display device.

  Considering this, it is preferable that the reflectivity be as high as possible. In particular, a reflective member that has a large number of minute cavities inside the reflective member and uses multiple reflection at the interface can easily obtain a high reflectivity.

  As the base material of the reflecting member 3, polyester, polypropylene, polyethylene terephthalate, polycarbonate and other various resins can be used, and the surface is coated with a function such as light resistance (UV resistance) and rust resistance. May be.

  The transparent resin 4 preferably has high transmittance, heat resistance and light resistance (UV resistance), low moisture permeability, adhesion, and no cracks. In addition, from the viewpoint of light extraction from the light emitting diode 2, a higher refractive index is preferable. The curing method of the transparent resin 4 may be any one of thermosetting, UV curing and other curing methods. In this embodiment, the transparent resin 4 serves to fix the wiring substrate 1 and the reflecting member 3 after curing. There is also. The amount and shape of the transparent resin 4 can be arbitrarily set according to various properties such as a design policy of the lighting device, resin viscosity, and thixotropy.

  For example, as shown in FIG. 9A, a small amount of sealing is performed on a part of the mounting portion, and as shown in FIG. 9B, a large amount of sealing is applied to cover the mounting portion and the tapered portion. As shown in FIG. 9 (c), the mounting portion is covered and a convex seal is formed on a part of the tapered portion, or the mounting portion is covered as shown in FIG. It can take any other shape, such as a concave sealing shape to a part, reduce the amount of resin used, make it uniform, control the directivity of light by using the lens effect, etc., and the purpose and use of the lighting device It is possible to design according to.

  Further, as shown in FIG. 10A, two or more kinds of transparent resins such as a transparent resin 41 for sealing the light emitting diode 2 and a transparent resin 42 for sealing the periphery thereof may be used. Here, after the light emitting diode 2 is sealed and cured with the transparent resin 41 by dispensing, potting or the like, the transparent resin 42 may be further sealed and cured. The transparent resin 41 may be molded in advance on the wiring board 1 using a mold or the like, and the transparent resin 42 may be enclosed and cured around the mold.

  Further, as shown in FIG. 10B, first, the transparent resin 42 is dispensed, and in an uncured state, a transparent resin 41 previously molded using a mold or the like is disposed, and the transparent resin 42 is cured. Also good. Thus, it is possible to easily form a complex transparent resin shape by using two kinds of resins.

  Incidentally, fine particles having a high refractive index are mixed in the transparent resin 4 or the transparent resin 41 to increase the refractive index, thereby improving the light extraction efficiency from the light emitting diode 2, or to the transparent resins 4, 41, 42 with a refractive index. It is also possible to improve the light uniformity by adding diffusibility by mixing different fine particles.

  FIG. 11A is a perspective view illustrating Example 2 of the lighting device according to the present invention, and FIG. 11B is a perspective view of a state before the transparent resin 4 is sealed. In this embodiment, a plurality of mounting portions 14 are arranged on the wiring board 1 in the left-right direction, and a plurality of rows (four rows in the figure) are arranged in parallel. Each mounting portion 14 is mounted with a plurality of light emitting diodes, for example, light emitting diodes emitting red, green, and blue (not shown), and the reflecting member 3 has a groove-like taper shape in the left-right direction. There is an opening in a portion corresponding to the mounting portion 14 at the bottom and is disposed on the wiring board 1.

  In this embodiment, since a plurality of mounting portions 14 arranged in a row are sealed with a series of transparent resins 4, the light emission from each portion of each mounting portion 14 is particularly along the groove-shaped taper portion. It is possible to mix colors better in the direction (left and right direction in the figure).

  Further, even when one light emitting diode emitting light of any one color of red, blue, and green is periodically mounted on each mounting portion 14 in the order of, for example, red, blue, and green (not shown). 1), since these mounting portions 14 are sealed with a series of transparent resins 4, the light emission from each portion of each mounting portion 14, in particular, the direction along the groove-shaped taper portion (left-right direction in the figure). Can be mixed well.

  In the present embodiment, the case where each row of the mounting portions 14 is straight, parallel, equally spaced, and equivalent in taper shape is shown, but the present invention is not limited to this, and the shape and application of the lighting device In accordance with the above, it may be arranged along a curved line, a square shape, etc., or may be unequally spaced, or the taper shape of the reflecting member 3 may be changed for each row. The mounting portions 14 may be arranged in two or more rows instead of one row for the series of transparent resins 4.

  FIG. 12 is a cross-sectional view for explaining a third embodiment of the lighting device according to the present invention. In this embodiment, the wiring layer of the wiring board 1 is composed of the lead frame 111, and a part of the lead frame 111 is bent so as to reach the upper surface of the reflecting member 3. In the present embodiment, the shape of the reflecting member 3 can be held by the lead frame 111, and the shape of the reflecting member 3 can be firmly held.

  13 (a) and 13 (b) are cross-sectional views illustrating Example 4 of the lighting device according to the present invention. In the present embodiment, the adhesive layer 6 is disposed between the reflective member 3 and the wiring board 1, and in FIG. 13A, the adhesive layer 6 is only on the bottom of the tapered portion of the reflective member 3. (B) is arranged on the entire back surface of the wiring member 3.

  In this embodiment, in any case, since the wiring substrate 1 and the reflecting member 3 are fixed by the adhesive layer 6, the deviation of the reflecting member 3 can be suppressed when the transparent resin 4 is sealed. Further, when the transparent resin 4 is sealed, resin leakage from the tapered portion can be suppressed. Further, in FIG. 13B, as shown in the third embodiment, when the bending process of the lead frame is applied, the reflecting member 3 can be held more firmly. Needless to say, other members may be used to hold the reflecting member 3.

  FIG. 14 is a perspective view for explaining a fifth embodiment of the illumination device used for the image display device according to the present invention. In this embodiment, an illuminating device 70 in which one or a plurality of illuminating devices described in the first to fourth embodiments are arranged, and an optical member that makes light emitted from the illuminating device 70 more uniform and controls the directivity of the light. A group 80 and a non-light emitting display panel 90 are included.

  The non-light emitting display panel 90 can display any image or character by controlling the light from the illumination device 70 on the back so as to be transmitted or blocked for each pixel. As the display mode of the non-light-emitting display panel 90, all of the liquid crystal display mode, the electrophoretic display mode, the electrochromic display mode, the electropowder fluid display mode, and other transmissive display modes that do not emit light themselves are used. Can do.

  Moreover, the optical member group 80 can obtain arbitrary directivity and light uniformity by using a diffusing plate, a reflecting plate, a light guide plate, a prism sheet, a polarizing reflecting plate diffusing sheet, etc. singly or in appropriate combination.

  In the present embodiment, one or more of the lighting devices described in the first to fourth embodiments are used as a backlight, so that the light uniformity of the lighting device 70 is high, and the lighting device 70, the optical member group 80, It is possible to provide a uniform image even if the image display device is made thinner or a part of the optical member group 80 is removed.

  In addition, since the light-emitting diode has a faster on / off response speed than a backlight using a conventional fluorescent tube, it can contribute to an improvement in image quality such as moving image characteristics and contrast of the image display device. At this time, the light emitting diodes in the illumination device 70 may be sequentially turned on for each column arranged in the horizontal direction in synchronization with the image signal of the non-light emitting display panel 90. In particular, when a display device is configured using a light emitting diode that emits red, green, and blue as a backlight, the color reproduction range is wide and very bright compared to a backlight using a conventional fluorescent tube. Can provide a simple image display. In addition, since the light emitting diode does not contain mercury, there is an advantage that it is environmentally friendly.

  FIG. 15 is a perspective view for explaining a sixth embodiment of the lighting device used in the image display device according to the present invention, in which the lighting device 70 is disposed on the side surface portion of the light guide plate 81 and light is incident on the light guide plate. It is what I did. On the back surface of the light guide plate 81, a sheet having a high reflectance is arranged, and after being reflected a plurality of times, it is emitted to the surface. Further, on the light guide plate 81, various optical member groups 80 such as a prism sheet and a polarizing reflector diffusion sheet are arranged alone or in combination as appropriate, and a non-light emitting display panel 90 is arranged thereon. In this embodiment, in particular, when a display device with a small screen size is manufactured, the use of the light guide plate 81 is preferable because the display device can be thinned.

  FIG. 16 is a cross-sectional view for explaining a seventh embodiment of the illuminating device used in the image display device according to the present invention, in which the illuminating device 70 is arranged on each side surface of a wedge-shaped light guide plate 81 arranged in a plurality of tiles. It is arranged. The way light travels from the illumination device 70 to the non-light emitting display panel 90 is the same as in the sixth embodiment. This embodiment is particularly suitable when the screen size is large. When the screen size of the display device is changed, there is an advantage that the number of light guide plates 81 and lighting devices 70 arranged in tiles can be increased or decreased. .

The perspective view of Example 1 of the illuminating device which concerns on this invention. Sectional view of FIG. Top view of FIG. Explanatory drawing of the electric circuit of Example 1 Explanatory drawing of the manufacturing process of Example 1. Sectional drawing explaining the mounting form of the light emitting diode of Example 1 Sectional drawing explaining the connection form of the light emitting diode of Example 1 The schematic diagram explaining the cross-sectional shape of the reflecting member of Example 1 Sectional drawing explaining the sealing form of the transparent resin of Example 1 Sectional drawing explaining the sealing form with two types of transparent resin of Example 1 The perspective view explaining Example 2. Sectional drawing explaining Example 3 The perspective view explaining Example 4 The perspective view explaining Example 5 The perspective view explaining Example 6. The perspective view explaining Example 7

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Wiring board, 11 ... Wiring layer, 12 ... Insulating layer, 13 ... Support substrate, 14 ... Mounting part, 111 ... Lead frame, 2R, 2G1, 2G2, 2B ... Light emitting diode, 3 ... Reflective member, 31 ... Tapered portion, 32 ... gap between reflecting member and wiring board, 4, 41, 42 ... transparent resin, 5 ... phosphor, 6 ... adhesive layer, 70 ... lighting device, 80 ... optical member group, 81 ... light guide plate, 90 ... Non-luminous display panel

Claims (16)

Light-emitting diodes arranged in a plurality of mounting portions on the wiring board, a reflecting member that reflects light emitted from the light-emitting diodes, and a transparent covering at least a part of the mounting portion or the mounting portion and at least a portion of the reflecting member In a lighting device comprising a resin,
The reflecting member has a uniform thickness and has a plurality of tapered portions, and an opening corresponding to the mounting portion is provided at the bottom of the tapered portion.   The lighting device according to claim 1, wherein the reflecting member is formed by a combination of bending, pressing, and drilling.   The lighting device according to claim 1, wherein a gap is provided between the reflecting member and the wiring board.   The said transparent resin is comprised from 2 types of transparent resin which covers the circumference | surroundings of a light emitting diode, and another transparent resin which covers the circumference | surroundings of the transparent resin, It is any one of Claim 1 thru | or 3 characterized by the above-mentioned. Lighting equipment   The plurality of light emitting diodes disposed on the wiring board is composed of a light emitting diode that emits light in a red wavelength region, a light emitting diode that emits light in a green wavelength region, and a light emitting diode that emits light in a blue region. The lighting device according to claim 1.   The lighting device according to claim 5, wherein at least one light emitting diode that emits light in each wavelength region of red, green, and blue is mounted on a mounting portion.   The lighting device according to claim 5, wherein the light emitting diode that emits light in each wavelength region of red, green, and blue is mounted on any one of the mounting portions.   The light emitting diode mounted on the mounting portion emits light in a blue or ultraviolet wavelength region, and a phosphor that emits light by being excited at these wavelengths is disposed around the light emitting diode. The lighting device according to any one of 1 to 4   The plurality of mounting portions are arranged in a plurality of rows in an arbitrary direction on the wiring board, and the mounting portions in each row are covered with a series of transparent resins. Lighting device described in   10. The wiring board according to claim 1, wherein the wiring board is formed of a support board, an insulating layer, and a lead frame, the lead frame has a convex part, and the convex part is in contact with the reflecting member. The lighting device according to any one of   The lighting device according to claim 1, further comprising an adhesive member between the reflection member and the wiring board.   The lighting device according to claim 1, wherein the reflecting member has a large number of fine cavities.   2. The reflective member according to claim 1, wherein the reflective member has a thickness of 0.5 mm or less, and an average reflectance of 95% or more with respect to a light emission wavelength of a light emitting diode or a light emission wavelength of an excited phosphor. The lighting device according to any one of 12   A backlight having one or more illumination devices according to any one of claims 1 to 13, an optical member group for controlling uniformity and directivity of light from the backlight, and a plurality of pixels, each pixel An image display device comprising a non-light emitting display panel that controls reflection and transmission of light every time   The image display device according to claim 14, wherein the backlight includes a light guide body that emits light from the illumination device from an incident surface on a side surface and emits the light to an upper surface. The image display device according to claim 15, wherein the backlight includes a plurality of sets of lighting devices and light guides, which are arranged in a tile shape.

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