WO2013065558A1 - Illumination device and display apparatus provided with same - Google Patents

Illumination device and display apparatus provided with same Download PDF

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Publication number
WO2013065558A1
WO2013065558A1 PCT/JP2012/077533 JP2012077533W WO2013065558A1 WO 2013065558 A1 WO2013065558 A1 WO 2013065558A1 JP 2012077533 W JP2012077533 W JP 2012077533W WO 2013065558 A1 WO2013065558 A1 WO 2013065558A1
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WO
WIPO (PCT)
Prior art keywords
light emitting
mounting substrate
mounting
inclined surfaces
emitting element
Prior art date
Application number
PCT/JP2012/077533
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French (fr)
Japanese (ja)
Inventor
貴博 吉川
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シャープ株式会社
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Publication of WO2013065558A1 publication Critical patent/WO2013065558A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs

Definitions

  • the present invention relates to a lighting device and a display device including the same, and more particularly to a lighting device including a plurality of light emitting elements and a display device including the same.
  • the display panel is a non-light emitting type liquid crystal display device (display device)
  • a backlight device illumination device that irradiates light to the display panel is usually mounted.
  • a direct type backlight device having a plurality of LEDs (light emitting elements) is known.
  • FIG. 9 is a cross-sectional view showing an example of a conventional direct type backlight device having a plurality of LEDs.
  • the backlight device 1001 includes a plurality of LEDs 1002, a diffusing lens 1003 disposed so as to cover the LEDs 1002, and a chassis 1004 for housing these.
  • a portion directly above the LED becomes bright on the screen (illuminated member), and uneven brightness tends to occur on a display panel (not shown). Therefore, in the conventional backlight device 1001, uneven luminance of the display panel is suppressed by providing a diffusion lens 1003 that diffuses light from the LED 1002 and transmits the light to the display panel side.
  • FIG. 10 is a cross-sectional view schematically showing the structure of the backlight device of Patent Document 1.
  • the backlight device 1101 of Patent Document 1 includes a plurality of LEDs 1102, a pedestal 1103 on which the plurality of LEDs 1102 are arranged, and an outer case (chassis) 1104 that stores them.
  • the pedestal 1103 has two inclined surfaces 1103a that are inclined with respect to a liquid crystal display panel (illuminated member) (not shown).
  • the plurality of LEDs 1102 are provided on the two inclined surfaces 1103a of the pedestal 1103, and the LEDs 1102 are arranged to be inclined with respect to the liquid crystal display panel.
  • the backlight device 1001 provided with the diffusing lens 1003 it is necessary to attach the diffusing lens 1003 for each LED 1002, and there is a problem that the assembling work becomes complicated. Further, since the diffusing lens 1003 is expensive, there is a problem that the cost of the backlight device 1001 increases.
  • Patent Document 1 does not disclose how to attach a plurality of LEDs 1102 to the two inclined surfaces 1103a of the pedestal 1103.
  • the present invention has been made to solve the above-described problems, and an object of the present invention is to provide an illuminating device capable of suppressing luminance unevenness of an illumination target member without using a diffusion lens, and It is to provide a display device including the same.
  • an illumination device of the present invention is an illumination device that illuminates a member to be illuminated, and includes a plurality of light emitting elements and a mounting substrate on which the plurality of light emitting elements are mounted. Has a plurality of first inclined surfaces inclined with respect to the illuminated member, and the light emitting element is mounted on at least two first inclined surfaces of the mounting substrate.
  • the mounting substrate has a plurality of first inclined surfaces inclined with respect to the illumination target member, and the light emitting element is mounted on the first inclined surface of the mounting substrate.
  • the mounting substrate has a plurality of first inclined surfaces inclined with respect to the illumination target member, and the light emitting element is mounted on at least two first inclined surfaces of the mounting substrate.
  • the mounting substrate having at least two first inclined surfaces on which the light emitting elements are mounted, it is possible to easily realize the luminance unevenness of the illumination target member without using the diffusion lens.
  • the mounting substrate is preferably formed by bending. If comprised in this way, the mounting board
  • the mounting substrate preferably includes a metal substrate, an insulating layer formed on the metal substrate, and a wiring pattern formed on the insulating layer.
  • the mounting substrate on which a plurality of light emitting elements are mounted can be easily bent.
  • heat generated in the light-emitting element can be radiated from the mounting substrate, heat dissipation of the lighting device can be improved. Further, the bent state can be easily held.
  • a white resist is provided on the insulating layer of the mounting substrate. If comprised in this way, since the reflectance of the light in the surface of a mounting board
  • the plurality of light emitting elements are mounted on the mounting substrate in a plurality of rows. If comprised in this way, many light emitting elements can be mounted on the two 1st inclined surfaces of a mounting substrate so that it may extend in a predetermined direction. Thereby, a light emitting element can be arranged along the longitudinal direction or short direction of an illuminating device.
  • the lighting device preferably includes a mounting portion having a plurality of second inclined surfaces that are inclined with respect to the member to be illuminated, and the mounting substrate is attached to the plurality of second inclined surfaces of the mounting portion. If comprised in this way, a light emitting element can be installed according to the inclination-angle of a 2nd inclined surface.
  • the mounting portion is preferably made of metal. If comprised in this way, since the heat
  • the lighting device including the mounting portion preferably includes a chassis that houses the light emitting element and the mounting substrate, and the mounting portion is formed of the chassis. If comprised in this way, a number of parts can be reduced.
  • the mounting portion is preferably formed in a triangular prism shape. If comprised in this way, since an attaching part can be formed in the elongate shape extended in a predetermined direction, a mounting board
  • the display device of the present invention includes the illumination device having the above-described configuration and a display panel illuminated by the illumination device. If comprised in this way, the display apparatus which can implement
  • an illuminating device capable of suppressing luminance unevenness of a member to be illuminated and a display device including the same without using a diffusing lens.
  • FIG. 1 It is sectional drawing which showed the structure of the display apparatus of 1st Embodiment of this invention. It is the perspective view which showed the structure of the attachment member of 1st Embodiment of this invention shown in FIG. It is the expanded sectional view which showed the structure of the light emitting element and mounting board
  • the display device 1 is used in, for example, a television receiver.
  • the display device 1 includes a display panel 2 (illuminated member) and a lighting device 10 that is disposed on the back side of the display panel 2 and illuminates the display panel 2.
  • the “back side (lower side in FIG. 1)” of the “back side of the display panel 2” is an orientation concept that is also applied to other components.
  • the display panel 2 is composed of a liquid crystal display panel, and has two glass substrates that sandwich a liquid crystal layer (not shown).
  • the display panel 2 displays an image by being illuminated by the illumination device 10.
  • the lighting device 10 is a direct type backlight device.
  • the lighting device 10 covers the light emitting elements 11, a plurality of mounting boards 12 on which the plurality of light emitting elements 11 are mounted, an attachment member 13 (attachment portion) to which the mounting board 12 is attached, and the light emitting elements 11.
  • Diffusing plate 14 arranged in this manner, a plurality of optical sheets 15 arranged on the front surface (the surface on the display panel 2 side) of the diffusing plate 14, and a metal chassis 16 that houses the light emitting element 11 and the mounting substrate 12. Including.
  • the mounting member 13 is made of a metal such as aluminum, aluminum alloy, iron, or copper, and functions as a heat conducting member. As shown in FIG. 2, the attachment member 13 is formed in an elongated triangular prism shape, and includes a bottom surface 13a (see FIG. 1) and two inclined surfaces 13b (second inclined surfaces).
  • the mounting member 13 is disposed so as to extend along the longitudinal direction (or short direction) of the chassis 16 as shown in FIG.
  • the plurality of attachment members 13 are arranged at a predetermined interval in the short direction (or longitudinal direction) of the chassis 16.
  • the attachment members 13 are arranged in two rows, but the attachment members 13 may be arranged in three or more rows in the short side direction (or longitudinal direction) of the chassis 16.
  • the attachment member 13 is fixed to the bottom surface portion of the chassis 16 with screws or double-sided tape.
  • the two inclined surfaces 13b are formed so that the inclination angles with respect to the bottom surface 13a are equal, and are inclined with respect to the back surface of the display panel 2.
  • An angle (base angle) formed by the bottom surface 13a and the inclined surface 13b is set to, for example, 10 degrees to 60 degrees.
  • the attachment member 13 may be solid or hollow. When the mounting member 13 is solid, it is possible to improve thermal conductivity, and when the mounting member 13 is hollow, it is possible to reduce the weight.
  • the attachment member 13 may not have the bottom surface 13a. That is, the attachment member 13 may be formed in an L-shaped cross-sectional shape having two inclined surfaces 13b.
  • the mounting substrate 12 is formed by bending, and has an L-shaped cross-sectional shape having two inclined surfaces 12a (first inclined surfaces). Further, the mounting substrate 12 is formed in an elongated shape like the mounting member 13. The two inclined surfaces 12 a are formed at the same inclination angle as the two inclined surfaces 13 b of the mounting member 13, and are inclined with respect to the back surface of the display panel 2.
  • the mounting board 12 is fixed to the two inclined surfaces 13b of the mounting member 13 with screws or double-sided tape so that the two inclined surfaces 12a are positioned on the two inclined surfaces 13b of the mounting member 13, respectively.
  • the mounting substrate 12 includes a metal substrate 120, an insulating layer 121 formed on the surface of the metal substrate 120, a wiring pattern 122 and a white resist 123 formed on the surface of the insulating layer 121.
  • the metal substrate 120 is made of a metal such as aluminum, an aluminum alloy, or copper, and functions as a heat conducting member.
  • the insulating layer 121 and the white resist 123 are made of, for example, an insulating resin.
  • the wiring pattern 122 is formed of a metal layer made of copper or the like.
  • the light emitting element 11 is mounted at a predetermined position of the wiring pattern 122 using a solder layer or the like (not shown).
  • the light emitting element 11 is mounted at a predetermined position of the flat mounting substrate 12 as shown in FIGS. Then, the mounting board 12 is bent at a predetermined position (center line of the mounting board 12) L1. As a result, as shown in FIG. 3, the mounting substrate 12 having two inclined surfaces 12 a on which the light emitting elements 11 are mounted is obtained. Then, after the mounting substrate 12 is attached to the attachment member 13, the attachment member 13 is fixed to the chassis 16. The mounting board 12 may be attached to the attachment member 13 after the attachment member 13 is fixed to the chassis 16.
  • the light emitting element 11 is composed of an LED, for example, and emits white light.
  • the plurality of light emitting elements 11 are mounted in a row on each of the inclined surfaces 12 a of the mounting substrate 12. That is, the plurality of light emitting elements 11 are mounted on the mounting substrate 12 in two rows.
  • the plurality of light emitting elements 11 are installed on the mounting substrate 12 so as to be inclined with respect to the back surface of the display panel 2. That is, the light emitting axis direction of the light emitting element 11 (the direction in which the intensity of light emitted from the light emitting element 11 is highest) is inclined with respect to the back surface of the display panel 2.
  • the diffusion plate 14 is made of a resin plate-like member, and closes the opening of the chassis 16 on the display panel 2 side. That is, the diffusion plate 14 is disposed so as to cover the light emitting element 11. Further, the diffusion plate 14 has a function of diffusing light from the light emitting element 11 and transmitting it to the display panel 2 side.
  • the plurality of optical sheets 15 are made of a resin sheet-like member thinner than the diffusion plate 14 and are arranged on the display panel 2 side of the diffusion plate 14.
  • the optical sheet 15 diffuses or collects light transmitted through the diffusion plate 14. Note that the type of the optical sheet 15 to be used can be changed according to the application.
  • the mounting substrate 12 has a plurality of inclined surfaces 12 a inclined with respect to the display panel 2, and the light emitting element 11 is mounted on the inclined surface 12 a of the mounting substrate 12.
  • the light emitting element 11 is disposed to be inclined with respect to the display panel 2, and the light emission axis direction of the light emitting element 11 is inclined with respect to the back surface of the display panel 2.
  • light easily reaches not only the portion directly above the light emitting element 11 but also other portions (such as a portion between the light emitting elements 11).
  • FIG. Therefore, it is not necessary to provide a diffusion lens that diffuses light from the light emitting element 11. As a result, since the operation
  • the mounting substrate 12 having the two inclined surfaces 12a on which the light emitting elements 11 are mounted it is possible to easily realize the suppression of luminance unevenness of the display panel 2 without using a diffusion lens. Can do.
  • the mounting substrate 12 having the light emitting elements 11 mounted on the two inclined surfaces 12a can be easily obtained by bending the mounting substrate 12 after mounting the plurality of light emitting elements 11 on the flat mounting substrate 12. Obtainable. That is, since it is not necessary to mount the light emitting element 11 on the inclined surface, the light emitting element 11 can be easily mounted on the mounting substrate 12.
  • the mounting substrate 12 includes the metal substrate 120, the insulating layer 121 formed on the metal substrate 120, and the wiring pattern 122 formed on the insulating layer 121.
  • the mounting substrate 12 on which the plurality of light emitting elements 11 are mounted can be easily bent.
  • the heat generated in the light emitting element 11 can be dissipated from the mounting substrate 12, the heat dissipation of the lighting device 10 can be improved. Further, the bent state can be easily held.
  • the white resist 123 is provided on the insulating layer 121 of the mounting substrate 12.
  • the plurality of light emitting elements 11 are mounted on the mounting substrate 12 in two rows. Thereby, a large number of light emitting elements 11 can be mounted on the two inclined surfaces 12a of the mounting substrate 12 so as to extend in a predetermined direction. Thereby, the light emitting elements 11 can be arranged along the longitudinal direction or the lateral direction of the lighting device 10 (the longitudinal direction or the lateral direction of the chassis 16).
  • the mounting member 13 having the two inclined surfaces 13 b inclined with respect to the display panel 2 is provided, and the mounting substrate 12 is attached to the two inclined surfaces 13 b of the mounting member 13.
  • the light emitting element 11 can be installed according to the inclination angle of the inclined surface 13b.
  • the attachment member 13 is made of metal. Therefore, since the heat generated in the light emitting element 11 can be radiated to the mounting member 13 via the mounting substrate 12, the heat dissipation of the lighting device 10 can be further improved. Furthermore, since heat can be radiated from the mounting member 13 to the chassis 16 as well, the heat dissipation of the lighting device 10 can be further improved.
  • the attachment member 13 is formed in a triangular prism shape.
  • the attachment member 13 can be formed in an elongated shape extending in a predetermined direction, so that the mounting substrate 12 can be formed in an elongated shape extending in a predetermined direction, and a large number of light emitting elements 11 can be formed on one mounting substrate 12.
  • the attachment member 13 can be arrange
  • the attachment portion 16 a is integrally provided on the chassis 16 by pressing the bottom surface portion of the chassis 16. Similar to the attachment member 13 of the first embodiment, the attachment portion 16a is formed with two inclined surfaces 16b (second inclined surfaces) that are inclined with respect to the back surface of the display panel 2. The mounting board 12 is attached to the two inclined surfaces 16b.
  • the mounting portion 16a to which the mounting substrate 12 is attached is formed by the chassis 16. Thereby, the number of parts can be reduced.
  • the plurality of light emitting elements 11 are alternately arranged on the mounting substrate 12. That is, the plurality of light emitting elements 11 are arranged in two rows in a staggered pattern on the mounting substrate 12.
  • the number of the light emitting elements 11 can be reduced by alternately arranging the plurality of light emitting elements 11 on the mounting substrate 12 as described above.
  • the present invention is not limited thereto, and may be applied to a display panel other than the liquid crystal display panel.
  • the backlight apparatus which illuminates a display panel was demonstrated as an example of an illuminating device, this invention is applicable not only to this but the illuminating device which illuminates to-be-illuminated members other than a display panel. is there.
  • the mounting member 16 may be formed in a pyramid shape (quadrangular pyramid shape), and the mounting substrate 12 may be formed in a shape corresponding thereto. That is, the mounting member 16 is formed to have four inclined surfaces 13b, and the mounting board 12 is formed to have four inclined surfaces 12a. Also in this case, the mounting substrate 12 can be easily formed so as to have four inclined surfaces 12a by bending the flat mounting substrate 12.
  • the mounting member 16 may be formed in a pyramid shape (quadrangular pyramid shape), and the mounting substrate 12 may be formed in a shape corresponding thereto. That is, the mounting member 16 is formed to have four inclined surfaces 13b, and the mounting board 12 is formed to have four inclined surfaces 12a. Also in this case, the mounting substrate 12 can be easily formed so as to have four inclined surfaces 12a by bending the flat mounting substrate 12.
  • the light emitting elements 11 are mounted on all four inclined surfaces 12a, but the light emitting elements 11 may be mounted on only two or three of the four inclined surfaces 12a.
  • the attachment member may be formed in a triangular pyramid shape, a pentagonal pyramid shape, or other shapes instead of the pyramid shape.
  • the mounting substrate may be attached to the chassis without providing the attachment member 13 or the attachment portion 16a.
  • the present invention is not limited to this, and the light emitting devices may be mounted on the mounting substrate in three or more rows.
  • the description has been made by omitting the reflective sheet that is normally disposed inside the chassis, but it is preferable to provide the reflective sheet inside the chassis. If comprised in this way, the utilization efficiency of light can be improved easily.
  • Display device 2 Display panel (illuminated member) DESCRIPTION OF SYMBOLS 10 Illuminating device 11 Light emitting element 12 Mounting board 12a Inclined surface (1st inclined surface) 13 Mounting member (Mounting part) 13b inclined surface (second inclined surface) 16 Chassis 16a Mounting portion 16b Inclined surface (second inclined surface) 120 Metal substrate 121 Insulating layer 122 Wiring pattern 123 White resist

Abstract

Provided is an illumination device making it possible to curb unevenness in the brightness of an illuminated member, without the use of a diffusing lens. This illumination device (10) is provided with a plurality of light-emitting elements (11), and a mounting board (12) onto which the plurality of light-emitting elements are mounted. The mounting board has a plurality of inclined surfaces (12a) inclined with respect to a display panel (2), and the light-emitting elements are mounted onto two inclined surfaces of the mounting board.

Description

照明装置およびそれを備えた表示装置LIGHTING DEVICE AND DISPLAY DEVICE HAVING THE SAME
　この発明は、照明装置およびそれを備えた表示装置に関し、特に、複数の発光素子を含む照明装置およびそれを備えた表示装置に関する。 The present invention relates to a lighting device and a display device including the same, and more particularly to a lighting device including a plurality of light emitting elements and a display device including the same.
　液晶表示装置（表示装置）は、表示パネル（被照明部材）が非発光型なので、通常、表示パネルに対して光を照射するバックライト装置（照明装置）が搭載される。このようなバックライト装置として、複数のＬＥＤ（発光素子）を備えた直下型のバックライト装置が知られている。 Since the display panel (illuminated member) is a non-light emitting type liquid crystal display device (display device), a backlight device (illumination device) that irradiates light to the display panel is usually mounted. As such a backlight device, a direct type backlight device having a plurality of LEDs (light emitting elements) is known.
　図９は、複数のＬＥＤを備えた従来の直下型のバックライト装置の一例を示した断面図である。バックライト装置１００１は図９に示すように、複数のＬＥＤ１００２と、ＬＥＤ１００２を覆うように配置された拡散レンズ１００３と、これらを収納するシャーシ１００４とを備えている。一般的にＬＥＤから出射する光は指向性が高いので、ＬＥＤの真上部分が画面（被照明部材）上で明るくなり、表示パネル（図示せず）に輝度ムラが発生しやすい。そこで、従来のバックライト装置１００１では、ＬＥＤ１００２からの光を拡散して表示パネル側に透過する拡散レンズ１００３を設けることにより、表示パネルの輝度ムラを抑制している。 FIG. 9 is a cross-sectional view showing an example of a conventional direct type backlight device having a plurality of LEDs. As shown in FIG. 9, the backlight device 1001 includes a plurality of LEDs 1002, a diffusing lens 1003 disposed so as to cover the LEDs 1002, and a chassis 1004 for housing these. In general, since light emitted from an LED has high directivity, a portion directly above the LED becomes bright on the screen (illuminated member), and uneven brightness tends to occur on a display panel (not shown). Therefore, in the conventional backlight device 1001, uneven luminance of the display panel is suppressed by providing a diffusion lens 1003 that diffuses light from the LED 1002 and transmits the light to the display panel side.
　また、従来、表示パネルに対して傾斜するように発光素子を配置したバックライト装置が提案されている（例えば特許文献１参照）。図１０は、上記特許文献１のバックライト装置の構造を概略的に示した断面図である。上記特許文献１のバックライト装置１１０１は図１０に示すように、複数のＬＥＤ１１０２と、複数のＬＥＤ１１０２が配置される台座１１０３と、これらを収納する外装ケース（シャーシ）１１０４とを備える。台座１１０３は図示しない液晶表示パネル（被照明部材）に対して傾斜する２つの傾斜面１１０３ａを有する。複数のＬＥＤ１１０２は台座１１０３の２つの傾斜面１１０３ａに設けられており、ＬＥＤ１１０２は液晶表示パネルに対して傾斜して配置される。 Further, conventionally, a backlight device in which light emitting elements are arranged so as to be inclined with respect to the display panel has been proposed (see, for example, Patent Document 1). FIG. 10 is a cross-sectional view schematically showing the structure of the backlight device of Patent Document 1. As shown in FIG. 10, the backlight device 1101 of Patent Document 1 includes a plurality of LEDs 1102, a pedestal 1103 on which the plurality of LEDs 1102 are arranged, and an outer case (chassis) 1104 that stores them. The pedestal 1103 has two inclined surfaces 1103a that are inclined with respect to a liquid crystal display panel (illuminated member) (not shown). The plurality of LEDs 1102 are provided on the two inclined surfaces 1103a of the pedestal 1103, and the LEDs 1102 are arranged to be inclined with respect to the liquid crystal display panel.
特開２００８－９６７６５号公報JP 2008-96765 A
　しかしながら、拡散レンズ１００３を備えたバックライト装置１００１では、ＬＥＤ１００２毎に拡散レンズ１００３を取り付ける必要があり、組立作業が煩雑になるという問題点がある。また、拡散レンズ１００３は高価なので、バックライト装置１００１のコストが高くなるという問題点もある。 However, in the backlight device 1001 provided with the diffusing lens 1003, it is necessary to attach the diffusing lens 1003 for each LED 1002, and there is a problem that the assembling work becomes complicated. Further, since the diffusing lens 1003 is expensive, there is a problem that the cost of the backlight device 1001 increases.
　また、上記特許文献１では、台座１１０３の２つの傾斜面１１０３ａに対して複数のＬＥＤ１１０２をどのように取り付けるのかが開示されていない。 Further, the above-mentioned Patent Document 1 does not disclose how to attach a plurality of LEDs 1102 to the two inclined surfaces 1103a of the pedestal 1103.
　この発明は、上記のような課題を解決するためになされたものであり、この発明の目的は、拡散レンズを用いることなく、被照明部材の輝度ムラを抑制することが実現可能な照明装置およびそれを備えた表示装置を提供することである。 The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an illuminating device capable of suppressing luminance unevenness of an illumination target member without using a diffusion lens, and It is to provide a display device including the same.
　上記目的を達成するために、この発明の照明装置は、被照明部材を照明する照明装置であって、複数の発光素子と、複数の発光素子が実装される実装基板と、を備え、実装基板は被照明部材に対して傾斜する複数の第１傾斜面を有し、実装基板の少なくとも２つの第１傾斜面に、発光素子が実装されている。 In order to achieve the above object, an illumination device of the present invention is an illumination device that illuminates a member to be illuminated, and includes a plurality of light emitting elements and a mounting substrate on which the plurality of light emitting elements are mounted. Has a plurality of first inclined surfaces inclined with respect to the illuminated member, and the light emitting element is mounted on at least two first inclined surfaces of the mounting substrate.
　この照明装置では、上記のように、実装基板は被照明部材に対して傾斜する複数の第１傾斜面を有し、実装基板の第１傾斜面に発光素子が実装されている。これにより、発光素子が被照明部材に対して傾斜して配置されるので、発光素子の真上部分だけでなく、他の部分にも光が到達しやすくなる。このため、発光素子の真上部分が他の部分に比べて明るくなるのを抑制することができるので、被照明部材に輝度ムラが発生するのを抑制することができる。したがって、発光素子からの光を拡散する拡散レンズを設ける必要がなくなる。その結果、発光素子毎に拡散レンズを取り付ける作業が必要なくなるので、照明装置の組立作業が煩雑になるのを抑制することができる。また、高価な拡散レンズを設ける必要がないので、照明装置のコストを低くすることができる。 In this lighting device, as described above, the mounting substrate has a plurality of first inclined surfaces inclined with respect to the illumination target member, and the light emitting element is mounted on the first inclined surface of the mounting substrate. Thereby, since the light emitting element is disposed to be inclined with respect to the member to be illuminated, light easily reaches not only the portion directly above the light emitting element but also other portions. For this reason, since it can suppress that the part right above a light emitting element becomes bright compared with another part, it can suppress that a brightness nonuniformity generate | occur | produces in a to-be-illuminated member. Therefore, it is not necessary to provide a diffusion lens that diffuses light from the light emitting element. As a result, it is not necessary to attach a diffusing lens for each light emitting element, so that the assembly work of the lighting device can be prevented from being complicated. Moreover, since it is not necessary to provide an expensive diffuser lens, the cost of the lighting device can be reduced.
　また、上記のように、実装基板は被照明部材に対して傾斜する複数の第１傾斜面を有し、実装基板の少なくとも２つの第１傾斜面に、発光素子が実装されている。このように、発光素子が実装される少なくとも２つの第１傾斜面を有する実装基板を設けることによって、拡散レンズを用いることなく、被照明部材の輝度ムラの抑制を容易に実現することができる。 Further, as described above, the mounting substrate has a plurality of first inclined surfaces inclined with respect to the illumination target member, and the light emitting element is mounted on at least two first inclined surfaces of the mounting substrate. As described above, by providing the mounting substrate having at least two first inclined surfaces on which the light emitting elements are mounted, it is possible to easily realize the luminance unevenness of the illumination target member without using the diffusion lens.
　上記照明装置において、好ましくは、実装基板は折り曲げることにより形成されている。このように構成すれば、平板状の実装基板に複数の発光素子を実装した後に実装基板を折り曲げることにより、少なくとも２つの第１傾斜面に発光素子が実装された実装基板を容易に得ることができる。すなわち、傾斜した面に発光素子を実装する必要がないので、発光素子を実装基板に容易に実装することができる。 In the above lighting device, the mounting substrate is preferably formed by bending. If comprised in this way, the mounting board | substrate with which the light emitting element was mounted in the at least 2 1st inclined surface can be easily obtained by bending a mounting board | substrate after mounting a several light emitting element in the flat mounting board. it can. That is, since it is not necessary to mount the light emitting element on the inclined surface, the light emitting element can be easily mounted on the mounting substrate.
　上記実装基板が折り曲げることにより形成されている照明装置において、好ましくは、実装基板は、金属基板と、金属基板上に形成された絶縁層と、絶縁層上に形成された配線パターンとを含む。このように、金属基板を用いて実装基板を形成することによって、複数の発光素子が実装された実装基板を容易に折り曲げることができる。また、発光素子で発生する熱を実装基板から放熱させることができるので、照明装置の放熱性を向上させることができる。また、折り曲げた状態を容易に保持することができる。 In the lighting device formed by bending the mounting substrate, the mounting substrate preferably includes a metal substrate, an insulating layer formed on the metal substrate, and a wiring pattern formed on the insulating layer. Thus, by forming a mounting substrate using a metal substrate, the mounting substrate on which a plurality of light emitting elements are mounted can be easily bent. In addition, since heat generated in the light-emitting element can be radiated from the mounting substrate, heat dissipation of the lighting device can be improved. Further, the bent state can be easily held.
　この場合、好ましくは、実装基板の絶縁層上には白色レジストが設けられている。このように構成すれば、実装基板の表面での光の反射率を向上させることができるので、発光素子から出射した光の利用効率を向上させることができる。 In this case, preferably, a white resist is provided on the insulating layer of the mounting substrate. If comprised in this way, since the reflectance of the light in the surface of a mounting board | substrate can be improved, the utilization efficiency of the light radiate | emitted from the light emitting element can be improved.
　上記照明装置において、好ましくは、複数の発光素子は、実装基板に複数の列状に実装されている。このように構成すれば、実装基板の２つの第１傾斜面に、多数の発光素子を所定方向に延びるように実装することができる。これにより、照明装置の長手方向または短手方向に沿って発光素子を配列することができる。 In the illumination device, preferably, the plurality of light emitting elements are mounted on the mounting substrate in a plurality of rows. If comprised in this way, many light emitting elements can be mounted on the two 1st inclined surfaces of a mounting substrate so that it may extend in a predetermined direction. Thereby, a light emitting element can be arranged along the longitudinal direction or short direction of an illuminating device.
　上記照明装置において、好ましくは、被照明部材に対して傾斜する複数の第２傾斜面を有する取付部を備え、実装基板は取付部の複数の第２傾斜面に取り付けられている。このように構成すれば、第２傾斜面の傾斜角度に合わせて発光素子を設置することができる。 The lighting device preferably includes a mounting portion having a plurality of second inclined surfaces that are inclined with respect to the member to be illuminated, and the mounting substrate is attached to the plurality of second inclined surfaces of the mounting portion. If comprised in this way, a light emitting element can be installed according to the inclination-angle of a 2nd inclined surface.
　上記取付部を備える照明装置において、好ましくは、取付部は金属製である。このように構成すれば、発光素子で発生する熱を実装基板を介して取付部に放熱させることができるので、照明装置の放熱性を向上させることができる。 In the lighting device including the mounting portion, the mounting portion is preferably made of metal. If comprised in this way, since the heat | fever generate | occur | produced with a light emitting element can be radiated | emitted to an attaching part via a mounting board | substrate, the heat dissipation of an illuminating device can be improved.
　上記取付部を備える照明装置において、好ましくは、発光素子および実装基板を収納するシャーシを備え、取付部はシャーシにより形成されている。このように構成すれば、部品点数を削減することができる。 The lighting device including the mounting portion preferably includes a chassis that houses the light emitting element and the mounting substrate, and the mounting portion is formed of the chassis. If comprised in this way, a number of parts can be reduced.
　上記取付部を備える照明装置において、好ましくは、取付部は三角柱形状に形成されている。このように構成すれば、取付部を所定方向に延びる細長形状に形成することができるので、実装基板を所定方向に延びる細長形状に形成することができ、１つの実装基板に多数の発光素子を実装することができる。また、照明装置の長手方向または短手方向に沿って延びるように取付部および発光素子を配置することができる。 In the lighting device including the mounting portion, the mounting portion is preferably formed in a triangular prism shape. If comprised in this way, since an attaching part can be formed in the elongate shape extended in a predetermined direction, a mounting board | substrate can be formed in the elongate shape extended in a predetermined direction, and many light emitting elements can be formed in one mounting board | substrate. Can be implemented. Further, the attachment portion and the light emitting element can be arranged so as to extend along the longitudinal direction or the lateral direction of the lighting device.
　この発明の表示装置は、上記の構成の照明装置と、照明装置に照明される表示パネルとを備える。このように構成すれば、拡散レンズを用いることなく、被照明部材の輝度ムラを抑制することが実現可能な表示装置を得ることができる。 The display device of the present invention includes the illumination device having the above-described configuration and a display panel illuminated by the illumination device. If comprised in this way, the display apparatus which can implement | achieve the brightness nonuniformity of a to-be-illuminated member can be obtained, without using a diffuser lens.
　以上のように、本発明によれば、拡散レンズを用いることなく、被照明部材の輝度ムラを抑制することが実現可能な照明装置およびそれを備えた表示装置を容易に得ることができる。 As described above, according to the present invention, it is possible to easily obtain an illuminating device capable of suppressing luminance unevenness of a member to be illuminated and a display device including the same without using a diffusing lens.
本発明の第１実施形態の表示装置の構造を示した断面図である。It is sectional drawing which showed the structure of the display apparatus of 1st Embodiment of this invention. 図１に示した本発明の第１実施形態の取付部材の構造を示した斜視図である。It is the perspective view which showed the structure of the attachment member of 1st Embodiment of this invention shown in FIG. 図１に示した本発明の第１実施形態の発光素子および実装基板の構造を示した拡大断面図である。It is the expanded sectional view which showed the structure of the light emitting element and mounting board | substrate of 1st Embodiment of this invention shown in FIG. 図１に示した本発明の第１実施形態の折り曲げ前の実装基板に発光素子を実装した状態を示した断面図である。It is sectional drawing which showed the state which mounted the light emitting element in the mounting board | substrate before bending of 1st Embodiment of this invention shown in FIG. 図１に示した本発明の第１実施形態の折り曲げ前の実装基板に発光素子を実装した状態を示した平面図である。It is the top view which showed the state which mounted the light emitting element in the mounting board | substrate before the bending of 1st Embodiment of this invention shown in FIG. 本発明の第２実施形態の表示装置の構造を示した断面図である。It is sectional drawing which showed the structure of the display apparatus of 2nd Embodiment of this invention. 本発明の第３実施形態の実装基板に発光素子を実装した状態を示した平面図である。It is the top view which showed the state which mounted the light emitting element on the mounting board | substrate of 3rd Embodiment of this invention. 本発明の変形例の実装基板および取付部材を示した分解斜視図である。It is the disassembled perspective view which showed the mounting substrate and attachment member of the modification of this invention. 複数のＬＥＤを備えた従来の直下型のバックライト装置の一例を示した断面図である。It is sectional drawing which showed an example of the conventional direct type | mold backlight apparatus provided with several LED. 上記特許文献１のバックライト装置の構造を概略的に示した断面図である。It is sectional drawing which showed the structure of the backlight apparatus of the said patent document 1 roughly.
　以下、本発明の実施形態について図面を参照して説明する。なお、理解を容易にするために、断面図であってもハッチングを施さない場合がある。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In order to facilitate understanding, even a cross-sectional view may not be hatched.
　本発明の第１実施形態による表示装置１は例えばテレビジョン受像機などに用いられるものである。また、表示装置１は図１に示すように、表示パネル２（被照明部材）と、表示パネル２の背面側に配置され、表示パネル２を照明する照明装置１０とを備えている。なお、「表示パネル２の背面側」の「背面側（図１では下側）」は、他の構成要素にも適用される方位概念である。 The display device 1 according to the first embodiment of the present invention is used in, for example, a television receiver. As shown in FIG. 1, the display device 1 includes a display panel 2 (illuminated member) and a lighting device 10 that is disposed on the back side of the display panel 2 and illuminates the display panel 2. Note that the “back side (lower side in FIG. 1)” of the “back side of the display panel 2” is an orientation concept that is also applied to other components.
　表示パネル２は液晶表示パネルからなり、図示しない液晶層を挟み込む２枚のガラス基板を有する。また、表示パネル２は照明装置１０に照明されることにより画像を表示する。 The display panel 2 is composed of a liquid crystal display panel, and has two glass substrates that sandwich a liquid crystal layer (not shown). The display panel 2 displays an image by being illuminated by the illumination device 10.
　照明装置１０は直下型のバックライト装置である。また、照明装置１０は、複数の発光素子１１と、複数の発光素子１１が実装された複数の実装基板１２と、実装基板１２が取り付けられる取付部材１３（取付部）と、発光素子１１を覆うように配置される拡散板１４と、拡散板１４の前面（表示パネル２側の面）上に配置される複数の光学シート１５と、発光素子１１や実装基板１２を収納する金属製のシャーシ１６とを含んでいる。 The lighting device 10 is a direct type backlight device. The lighting device 10 covers the light emitting elements 11, a plurality of mounting boards 12 on which the plurality of light emitting elements 11 are mounted, an attachment member 13 (attachment portion) to which the mounting board 12 is attached, and the light emitting elements 11. Diffusing plate 14 arranged in this manner, a plurality of optical sheets 15 arranged on the front surface (the surface on the display panel 2 side) of the diffusing plate 14, and a metal chassis 16 that houses the light emitting element 11 and the mounting substrate 12. Including.
　取付部材１３は例えばアルミニウム、アルミニウム合金、鉄または銅などの金属により形成されており、熱伝導部材として機能する。取付部材１３は図２に示すように、細長い三角柱形状に形成されており、底面１３ａ（図１参照）と２つの傾斜面１３ｂ（第２傾斜面）とを含んでいる。 The mounting member 13 is made of a metal such as aluminum, aluminum alloy, iron, or copper, and functions as a heat conducting member. As shown in FIG. 2, the attachment member 13 is formed in an elongated triangular prism shape, and includes a bottom surface 13a (see FIG. 1) and two inclined surfaces 13b (second inclined surfaces).
　取付部材１３は図１に示すように、シャーシ１６の長手方向（または短手方向）に沿って延びるように配置されている。複数の取付部材１３はシャーシ１６の短手方向（または長手方向）に互いに所定間隔を隔てて配置されている。なお、図１では、取付部材１３が２列状に配置されているが、取付部材１３はシャーシ１６の短手方向（または長手方向）に３列以上配置されていてもよい。取付部材１３はビスや両面テープなどによって、シャーシ１６の底面部に固定されている。 The mounting member 13 is disposed so as to extend along the longitudinal direction (or short direction) of the chassis 16 as shown in FIG. The plurality of attachment members 13 are arranged at a predetermined interval in the short direction (or longitudinal direction) of the chassis 16. In FIG. 1, the attachment members 13 are arranged in two rows, but the attachment members 13 may be arranged in three or more rows in the short side direction (or longitudinal direction) of the chassis 16. The attachment member 13 is fixed to the bottom surface portion of the chassis 16 with screws or double-sided tape.
　２つの傾斜面１３ｂは底面１３ａに対する傾斜角度が等しくなるように形成されているとともに、表示パネル２の背面に対して傾斜している。底面１３ａと傾斜面１３ｂとのなす角（底角）は、例えば１０度～６０度に設定されている。取付部材１３は中実であってもよいし、中空であってもよい。取付部材１３が中実の場合、熱伝導性を向上させることが可能であり、取付部材１３が中空の場合、軽量化することが可能である。また、取付部材１３は底面１３ａが無くてもよい。すなわち、取付部材１３は２つの傾斜面１３ｂを有するＬ字状の断面形状に形成されていてもよい。 The two inclined surfaces 13b are formed so that the inclination angles with respect to the bottom surface 13a are equal, and are inclined with respect to the back surface of the display panel 2. An angle (base angle) formed by the bottom surface 13a and the inclined surface 13b is set to, for example, 10 degrees to 60 degrees. The attachment member 13 may be solid or hollow. When the mounting member 13 is solid, it is possible to improve thermal conductivity, and when the mounting member 13 is hollow, it is possible to reduce the weight. The attachment member 13 may not have the bottom surface 13a. That is, the attachment member 13 may be formed in an L-shaped cross-sectional shape having two inclined surfaces 13b.
　実装基板１２は折り曲げることにより形成されており、２つの傾斜面１２ａ（第１傾斜面）を有するＬ字状の断面形状に形成されている。また、実装基板１２は取付部材１３と同様、細長形状に形成されている。２つの傾斜面１２ａは取付部材１３の２つの傾斜面１３ｂと同じ傾斜角度に形成されており、表示パネル２の背面に対して傾斜している。そして、２つの傾斜面１２ａが取付部材１３の２つの傾斜面１３ｂ上にそれぞれ位置するように、実装基板１２はビスや両面テープなどによって取付部材１３の２つの傾斜面１３ｂに固定されている。 The mounting substrate 12 is formed by bending, and has an L-shaped cross-sectional shape having two inclined surfaces 12a (first inclined surfaces). Further, the mounting substrate 12 is formed in an elongated shape like the mounting member 13. The two inclined surfaces 12 a are formed at the same inclination angle as the two inclined surfaces 13 b of the mounting member 13, and are inclined with respect to the back surface of the display panel 2. The mounting board 12 is fixed to the two inclined surfaces 13b of the mounting member 13 with screws or double-sided tape so that the two inclined surfaces 12a are positioned on the two inclined surfaces 13b of the mounting member 13, respectively.
　実装基板１２は図３に示すように、金属基板１２０と、金属基板１２０の表面上に形成された絶縁層１２１と、絶縁層１２１の表面上に形成された配線パターン１２２および白色レジスト１２３とを含んでいる。金属基板１２０はアルミニウム、アルミニウム合金または銅などの金属により形成されており、熱伝導部材として機能する。絶縁層１２１および白色レジスト１２３は例えば絶縁性樹脂により形成されている。配線パターン１２２は銅などからなる金属層により形成されている。配線パターン１２２の所定の位置には、半田層など（図示せず）を用いて発光素子１１が実装されている。 As shown in FIG. 3, the mounting substrate 12 includes a metal substrate 120, an insulating layer 121 formed on the surface of the metal substrate 120, a wiring pattern 122 and a white resist 123 formed on the surface of the insulating layer 121. Contains. The metal substrate 120 is made of a metal such as aluminum, an aluminum alloy, or copper, and functions as a heat conducting member. The insulating layer 121 and the white resist 123 are made of, for example, an insulating resin. The wiring pattern 122 is formed of a metal layer made of copper or the like. The light emitting element 11 is mounted at a predetermined position of the wiring pattern 122 using a solder layer or the like (not shown).
　２つの傾斜面１２ａを有する実装基板１２を製造する場合は図４および図５に示すように、平板状の実装基板１２の所定の位置に発光素子１１を実装する。そして、実装基板１２を所定の位置（実装基板１２の中心線）Ｌ１で折り曲げる。これにより、図３に示すように、発光素子１１が実装された２つの傾斜面１２ａを有する実装基板１２が得られる。そして、実装基板１２が取付部材１３に取り付けられた後、取付部材１３がシャーシ１６に固定される。なお、シャーシ１６に取付部材１３が固定された後に、実装基板１２が取付部材１３に取り付けられてもよい。 When manufacturing the mounting substrate 12 having two inclined surfaces 12a, the light emitting element 11 is mounted at a predetermined position of the flat mounting substrate 12 as shown in FIGS. Then, the mounting board 12 is bent at a predetermined position (center line of the mounting board 12) L1. As a result, as shown in FIG. 3, the mounting substrate 12 having two inclined surfaces 12 a on which the light emitting elements 11 are mounted is obtained. Then, after the mounting substrate 12 is attached to the attachment member 13, the attachment member 13 is fixed to the chassis 16. The mounting board 12 may be attached to the attachment member 13 after the attachment member 13 is fixed to the chassis 16.
　発光素子１１は例えばＬＥＤにより構成されており、白色光を出射する。複数の発光素子１１は実装基板１２の傾斜面１２ａの各々に１列状に実装されている。すなわち、複数の発光素子１１は実装基板１２に２列状に実装されている。また、複数の発光素子１１は実装基板１２に実装された状態で、表示パネル２の背面に対して傾斜して設置されている。すなわち、発光素子１１の光出射軸方向（発光素子１１から出射した光の強度が最も高い方向）は、表示パネル２の背面に対して傾斜している。 The light emitting element 11 is composed of an LED, for example, and emits white light. The plurality of light emitting elements 11 are mounted in a row on each of the inclined surfaces 12 a of the mounting substrate 12. That is, the plurality of light emitting elements 11 are mounted on the mounting substrate 12 in two rows. The plurality of light emitting elements 11 are installed on the mounting substrate 12 so as to be inclined with respect to the back surface of the display panel 2. That is, the light emitting axis direction of the light emitting element 11 (the direction in which the intensity of light emitted from the light emitting element 11 is highest) is inclined with respect to the back surface of the display panel 2.
　図１に示すように、拡散板１４は樹脂製の板状部材からなっているとともに、シャーシ１６の表示パネル２側の開口を塞いでいる。すなわち、拡散板１４は発光素子１１を覆うように配置されている。また、拡散板１４は発光素子１１からの光を拡散して表示パネル２側に透過する機能を有する。 As shown in FIG. 1, the diffusion plate 14 is made of a resin plate-like member, and closes the opening of the chassis 16 on the display panel 2 side. That is, the diffusion plate 14 is disposed so as to cover the light emitting element 11. Further, the diffusion plate 14 has a function of diffusing light from the light emitting element 11 and transmitting it to the display panel 2 side.
　複数の光学シート１５は拡散板１４よりも薄い樹脂製のシート状部材からなっており、拡散板１４の表示パネル２側に配置されている。光学シート１５は拡散板１４を透過した光の拡散や集光などを行う。なお、使用する光学シート１５の種類は用途に応じて変更可能である。 The plurality of optical sheets 15 are made of a resin sheet-like member thinner than the diffusion plate 14 and are arranged on the display panel 2 side of the diffusion plate 14. The optical sheet 15 diffuses or collects light transmitted through the diffusion plate 14. Note that the type of the optical sheet 15 to be used can be changed according to the application.
　本実施形態では、上記のように、実装基板１２は表示パネル２に対して傾斜する複数の傾斜面１２ａを有し、実装基板１２の傾斜面１２ａに発光素子１１が実装されている。これにより、発光素子１１が表示パネル２に対して傾斜して配置されるとともに、発光素子１１の光出射軸方向は表示パネル２の背面に対して傾斜する。このため、発光素子１１の真上部分だけでなく、他の部分（発光素子１１同士の間の部分など）にも光が到達しやすくなる。これにより、発光素子１１の真上部分が他の部分に比べて明るくなるのを抑制することができるので、表示パネル２に輝度ムラが発生するのを抑制することができる。したがって、発光素子１１からの光を拡散する拡散レンズを設ける必要がなくなる。その結果、発光素子１１毎に拡散レンズを取り付ける作業が必要なくなるので、照明装置１０の組立作業が煩雑になるのを抑制することができる。また、高価な拡散レンズを設ける必要がないので、照明装置１０のコストを低くすることができる。 In the present embodiment, as described above, the mounting substrate 12 has a plurality of inclined surfaces 12 a inclined with respect to the display panel 2, and the light emitting element 11 is mounted on the inclined surface 12 a of the mounting substrate 12. Thereby, the light emitting element 11 is disposed to be inclined with respect to the display panel 2, and the light emission axis direction of the light emitting element 11 is inclined with respect to the back surface of the display panel 2. For this reason, light easily reaches not only the portion directly above the light emitting element 11 but also other portions (such as a portion between the light emitting elements 11). Thereby, since it can suppress that the part right above the light emitting element 11 becomes bright compared with another part, it can suppress that a brightness | luminance nonuniformity generate | occur | produces in the display panel 2. FIG. Therefore, it is not necessary to provide a diffusion lens that diffuses light from the light emitting element 11. As a result, since the operation | work which attaches a diffusion lens for every light emitting element 11 becomes unnecessary, it can suppress that the assembly operation | work of the illuminating device 10 becomes complicated. Moreover, since it is not necessary to provide an expensive diffuser lens, the cost of the illumination device 10 can be reduced.
　また、上記のように、発光素子１１が実装される２つの傾斜面１２ａを有する実装基板１２を設けることによって、拡散レンズを用いることなく、表示パネル２の輝度ムラの抑制を容易に実現することができる。 Further, as described above, by providing the mounting substrate 12 having the two inclined surfaces 12a on which the light emitting elements 11 are mounted, it is possible to easily realize the suppression of luminance unevenness of the display panel 2 without using a diffusion lens. Can do.
　また、上記のように、平板状の実装基板１２に複数の発光素子１１を実装した後に実装基板１２を折り曲げることによって、２つの傾斜面１２ａに発光素子１１が実装された実装基板１２を容易に得ることができる。すなわち、傾斜した面に発光素子１１を実装する必要がないので、発光素子１１を実装基板１２に容易に実装することができる。 Further, as described above, the mounting substrate 12 having the light emitting elements 11 mounted on the two inclined surfaces 12a can be easily obtained by bending the mounting substrate 12 after mounting the plurality of light emitting elements 11 on the flat mounting substrate 12. Obtainable. That is, since it is not necessary to mount the light emitting element 11 on the inclined surface, the light emitting element 11 can be easily mounted on the mounting substrate 12.
　また、上記のように、実装基板１２は、金属基板１２０と、金属基板１２０上に形成された絶縁層１２１と、絶縁層１２１上に形成された配線パターン１２２とを含む。このように、金属基板１２０を用いて実装基板１２を形成することによって、複数の発光素子１１が実装された実装基板１２を容易に折り曲げることができる。また、発光素子１１で発生する熱を実装基板１２から放熱させることができるので、照明装置１０の放熱性を向上させることができる。また、折り曲げた状態を容易に保持することができる。 As described above, the mounting substrate 12 includes the metal substrate 120, the insulating layer 121 formed on the metal substrate 120, and the wiring pattern 122 formed on the insulating layer 121. Thus, by forming the mounting substrate 12 using the metal substrate 120, the mounting substrate 12 on which the plurality of light emitting elements 11 are mounted can be easily bent. Moreover, since the heat generated in the light emitting element 11 can be dissipated from the mounting substrate 12, the heat dissipation of the lighting device 10 can be improved. Further, the bent state can be easily held.
　また、上記のように、実装基板１２の絶縁層１２１上には白色レジスト１２３が設けられている。これにより、実装基板１２の表面での光の反射率を向上させることができるので、発光素子１１から出射した光の利用効率を向上させることができる。 Further, as described above, the white resist 123 is provided on the insulating layer 121 of the mounting substrate 12. Thereby, since the reflectance of the light on the surface of the mounting substrate 12 can be improved, the utilization efficiency of the light emitted from the light emitting element 11 can be improved.
　また、上記のように、複数の発光素子１１は、実装基板１２に２列状に実装されている。これにより、実装基板１２の２つの傾斜面１２ａに、多数の発光素子１１を所定方向に延びるように実装することができる。これにより、照明装置１０の長手方向または短手方向（シャーシ１６の長手方向または短手方向）に沿って発光素子１１を配列することができる。 Further, as described above, the plurality of light emitting elements 11 are mounted on the mounting substrate 12 in two rows. Thereby, a large number of light emitting elements 11 can be mounted on the two inclined surfaces 12a of the mounting substrate 12 so as to extend in a predetermined direction. Thereby, the light emitting elements 11 can be arranged along the longitudinal direction or the lateral direction of the lighting device 10 (the longitudinal direction or the lateral direction of the chassis 16).
　また、上記のように、表示パネル２に対して傾斜する２つの傾斜面１３ｂを有する取付部材１３を設け、実装基板１２を取付部材１３の２つの傾斜面１３ｂに取り付ける。これにより、傾斜面１３ｂの傾斜角度に合わせて発光素子１１を設置することができる。 Further, as described above, the mounting member 13 having the two inclined surfaces 13 b inclined with respect to the display panel 2 is provided, and the mounting substrate 12 is attached to the two inclined surfaces 13 b of the mounting member 13. Thereby, the light emitting element 11 can be installed according to the inclination angle of the inclined surface 13b.
　また、上記のように、取付部材１３は金属製である。これにより、発光素子１１で発生する熱を実装基板１２を介して取付部材１３に放熱させることができるので、照明装置１０の放熱性をより向上させることができる。さらに、取付部材１３からシャーシ１６にも放熱させることができるので、照明装置１０の放熱性をさらに向上させることができる。 Further, as described above, the attachment member 13 is made of metal. Thereby, since the heat generated in the light emitting element 11 can be radiated to the mounting member 13 via the mounting substrate 12, the heat dissipation of the lighting device 10 can be further improved. Furthermore, since heat can be radiated from the mounting member 13 to the chassis 16 as well, the heat dissipation of the lighting device 10 can be further improved.
　また、上記のように、取付部材１３は三角柱形状に形成されている。これにより、取付部材１３を所定方向に延びる細長形状に形成することができるので、実装基板１２を所定方向に延びる細長形状に形成することができ、１つの実装基板１２に多数の発光素子１１を実装することができる。また、照明装置１０の長手方向または短手方向（シャーシ１６の長手方向または短手方向）に沿って延びるように取付部材１３を配置することができる。 Also, as described above, the attachment member 13 is formed in a triangular prism shape. As a result, the attachment member 13 can be formed in an elongated shape extending in a predetermined direction, so that the mounting substrate 12 can be formed in an elongated shape extending in a predetermined direction, and a large number of light emitting elements 11 can be formed on one mounting substrate 12. Can be implemented. Moreover, the attachment member 13 can be arrange | positioned so that it may extend along the longitudinal direction or transversal direction of the illuminating device 10 (longitudinal direction or transversal direction of the chassis 16).
（第２実施形態）
　本発明の第２実施形態の表示装置１では図６に示すように、取付部材１３に替えてシャーシ１６に取付部１６ａが形成されている。取付部１６ａはシャーシ１６の底面部をプレス加工することにより、シャーシ１６に一体的に設けられている。この取付部１６ａには、上記第１実施形態の取付部材１３と同様、表示パネル２の背面に対して傾斜する２つの傾斜面１６ｂ（第２傾斜面）が形成されている。そして、２つの傾斜面１６ｂに実装基板１２が取り付けられている。 (Second Embodiment)
In the display apparatus 1 according to the second embodiment of the present invention, as shown in FIG. The attachment portion 16 a is integrally provided on the chassis 16 by pressing the bottom surface portion of the chassis 16. Similar to the attachment member 13 of the first embodiment, the attachment portion 16a is formed with two inclined surfaces 16b (second inclined surfaces) that are inclined with respect to the back surface of the display panel 2. The mounting board 12 is attached to the two inclined surfaces 16b.
　第２実施形態のその他の構造は、上記第１実施形態と同様である。 Other structures of the second embodiment are the same as those of the first embodiment.
　本実施形態では、上記のように、実装基板１２が取り付けられる取付部１６ａを、シャーシ１６により形成している。これにより、部品点数を削減することができる。 In the present embodiment, as described above, the mounting portion 16a to which the mounting substrate 12 is attached is formed by the chassis 16. Thereby, the number of parts can be reduced.
　第２実施形態のその他の効果は、上記第１実施形態と同様である。 Other effects of the second embodiment are the same as those of the first embodiment.
（第３実施形態）
　本発明の第３実施形態の表示装置１では図７に示すように、複数の発光素子１１は実装基板１２に交互に配置されている。すなわち、複数の発光素子１１は実装基板１２に２列の千鳥状に配置されている。 (Third embodiment)
In the display device 1 according to the third embodiment of the present invention, as shown in FIG. 7, the plurality of light emitting elements 11 are alternately arranged on the mounting substrate 12. That is, the plurality of light emitting elements 11 are arranged in two rows in a staggered pattern on the mounting substrate 12.
　第３実施形態のその他の構造は、上記第１および第２実施形態と同様である。 Other structures of the third embodiment are the same as those of the first and second embodiments.
　本実施形態では、上記のように、複数の発光素子１１を実装基板１２に交互に配置することによって、発光素子１１の数を削減することができる。 In the present embodiment, the number of the light emitting elements 11 can be reduced by alternately arranging the plurality of light emitting elements 11 on the mounting substrate 12 as described above.
　第３実施形態のその他の効果は、上記第１および第２実施形態と同様である。 Other effects of the third embodiment are the same as those of the first and second embodiments.
　なお、今回開示された実施形態は、すべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記した実施形態の説明ではなく請求の範囲によって示され、さらに請求の範囲と均等の意味および範囲内でのすべての変更が含まれる。 In addition, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims, and further includes meanings equivalent to the scope of claims and all modifications within the scope.
　例えば、上記実施形態では、表示パネルを液晶表示パネルに適用した例について示したが、本発明はこれに限らず、液晶表示パネル以外の表示パネルに適用してもよい。 For example, in the above-described embodiment, an example in which the display panel is applied to a liquid crystal display panel has been described. However, the present invention is not limited thereto, and may be applied to a display panel other than the liquid crystal display panel.
　また、上記実施形態では、照明装置の一例として表示パネルを照明するバックライト装置について説明したが、本発明はこれに限らず、表示パネル以外の被照明部材を照明する照明装置にも適用可能である。 Moreover, in the said embodiment, although the backlight apparatus which illuminates a display panel was demonstrated as an example of an illuminating device, this invention is applicable not only to this but the illuminating device which illuminates to-be-illuminated members other than a display panel. is there.
　また、上記実施形態では、取付部材（取付部）を三角柱形状に形成し、実装基板をＬ字状の断面を有するように形成した例について説明したが、本発明はこれに限らない。例えば図８に示した本発明の変形例のように、取付部材１６をピラミッド状（四角錐形状）に形成し、実装基板１２をそれに合った形状に形成してもよい。すなわち、取付部材１６を４つの傾斜面１３ｂを有するように形成し、実装基板１２を４つの傾斜面１２ａを有するように形成する。この場合も、平板状の実装基板１２を折り曲げることにより、４つの傾斜面１２ａを有するように実装基板１２を容易に形成することができる。なお、図８では４つの傾斜面１２ａの全てに発光素子１１を実装しているが、４つの傾斜面１２ａのうちの２つまたは３つだけに発光素子１１を実装してもよい。また、取付部材はピラミッド状でなく、例えば三角錐形状、五角錐形状やその他の形状に形成されていてもよい。 In the above embodiment, the example in which the mounting member (mounting portion) is formed in a triangular prism shape and the mounting substrate is formed to have an L-shaped cross section has been described, but the present invention is not limited to this. For example, as in the modification of the present invention shown in FIG. 8, the mounting member 16 may be formed in a pyramid shape (quadrangular pyramid shape), and the mounting substrate 12 may be formed in a shape corresponding thereto. That is, the mounting member 16 is formed to have four inclined surfaces 13b, and the mounting board 12 is formed to have four inclined surfaces 12a. Also in this case, the mounting substrate 12 can be easily formed so as to have four inclined surfaces 12a by bending the flat mounting substrate 12. In FIG. 8, the light emitting elements 11 are mounted on all four inclined surfaces 12a, but the light emitting elements 11 may be mounted on only two or three of the four inclined surfaces 12a. Further, the attachment member may be formed in a triangular pyramid shape, a pentagonal pyramid shape, or other shapes instead of the pyramid shape.
　また、上記実施形態では、実装基板を取り付けるための取付部材１３や取付部１６ａを設けた例について説明したが、本発明はこれに限らない。取付部材１３や取付部１６ａを設けずに、実装基板をシャーシに取り付けてもよい。 In the above-described embodiment, the example in which the mounting member 13 and the mounting portion 16a for mounting the mounting board are provided has been described, but the present invention is not limited thereto. The mounting substrate may be attached to the chassis without providing the attachment member 13 or the attachment portion 16a.
　また、上記実施形態では、発光素子を実装基板に２列状に実装した例について説明したが、本発明はこれに限らず、発光素子を実装基板に３列以上実装してもよい。 In the above embodiment, an example in which the light emitting elements are mounted in two rows on the mounting substrate has been described. However, the present invention is not limited to this, and the light emitting devices may be mounted on the mounting substrate in three or more rows.
　また、上記実施形態では、シャーシの内側に通常配置される反射シートを省略して説明したが、シャーシの内側に反射シートを設けることが好ましい。このように構成すれば、光の利用効率を容易に向上させることができる。 In the above embodiment, the description has been made by omitting the reflective sheet that is normally disposed inside the chassis, but it is preferable to provide the reflective sheet inside the chassis. If comprised in this way, the utilization efficiency of light can be improved easily.
　また、上述した実施形態および変形例の構成を適宜組み合わせて得られる構成についても、本発明の技術的範囲に含まれる。 Further, a configuration obtained by appropriately combining the configurations of the above-described embodiments and modifications is also included in the technical scope of the present invention.
　１　表示装置
　２　表示パネル（被照明部材）
　１０　照明装置
　１１　発光素子
　１２　実装基板
　１２ａ　傾斜面（第１傾斜面）
　１３　取付部材（取付部）
　１３ｂ　傾斜面（第２傾斜面）
　１６　シャーシ
　１６ａ　取付部
　１６ｂ　傾斜面（第２傾斜面）
　１２０　金属基板
　１２１　絶縁層
　１２２　配線パターン
　１２３　白色レジスト 1 Display device 2 Display panel (illuminated member)
DESCRIPTION OF SYMBOLS 10 Illuminating device 11 Light emitting element 12 Mounting board 12a Inclined surface (1st inclined surface)
13 Mounting member (Mounting part)
13b inclined surface (second inclined surface)
16 Chassis 16a Mounting portion 16b Inclined surface (second inclined surface)
120 Metal substrate 121 Insulating layer 122 Wiring pattern 123 White resist

Claims (10)

  1. 　被照明部材を照明する照明装置であって、
    　複数の発光素子と、
    　前記複数の発光素子が実装される実装基板と、
    　を備え、
    　前記実装基板は前記被照明部材に対して傾斜する複数の第１傾斜面を有し、
    　前記実装基板の少なくとも２つの前記第１傾斜面に、前記発光素子が実装されていることを特徴とする照明装置。     An illumination device for illuminating a member to be illuminated,
    A plurality of light emitting elements;
    A mounting substrate on which the plurality of light emitting elements are mounted;
    With
    The mounting substrate has a plurality of first inclined surfaces that are inclined with respect to the illuminated member;
    The lighting device, wherein the light emitting element is mounted on at least two of the first inclined surfaces of the mounting substrate.
  2. 　前記実装基板は折り曲げることにより形成されていることを特徴とする請求項１に記載の照明装置。 The lighting device according to claim 1, wherein the mounting substrate is formed by bending.
  3. 　前記実装基板は、金属基板と、前記金属基板上に形成された絶縁層と、前記絶縁層上に形成された配線パターンとを含むことを特徴とする請求項１または２に記載の照明装置。 The lighting device according to claim 1 or 2, wherein the mounting substrate includes a metal substrate, an insulating layer formed on the metal substrate, and a wiring pattern formed on the insulating layer.
  4. 　前記実装基板の前記絶縁層上には白色レジストが設けられていることを特徴とする請求項３に記載の照明装置。 4. The illumination device according to claim 3, wherein a white resist is provided on the insulating layer of the mounting substrate.
  5. 　前記複数の発光素子は、前記実装基板に複数の列状に実装されていることを特徴とする請求項１～４のいずれか１項に記載の照明装置。 The lighting device according to any one of claims 1 to 4, wherein the plurality of light emitting elements are mounted on the mounting substrate in a plurality of rows.
  6. 　前記被照明部材に対して傾斜する複数の第２傾斜面を有する取付部を備え、
    　前記実装基板は前記取付部の複数の第２傾斜面に取り付けられていることを特徴とする請求項１～５のいずれか１項に記載の照明装置。     A mounting portion having a plurality of second inclined surfaces inclined with respect to the illuminated member;
    The lighting device according to any one of claims 1 to 5, wherein the mounting substrate is attached to a plurality of second inclined surfaces of the attachment portion.
  7. 　前記取付部は金属製であることを特徴とする請求項６に記載の照明装置。 The lighting device according to claim 6, wherein the mounting portion is made of metal.
  8. 　前記発光素子および前記実装基板を収納するシャーシを備え、
    　前記取付部は前記シャーシにより形成されていることを特徴とする請求項６または７に記載の照明装置。     A chassis for housing the light emitting element and the mounting substrate;
    The lighting device according to claim 6, wherein the attachment portion is formed by the chassis.
  9. 　前記取付部は三角柱形状に形成されていることを特徴とする請求項６～８のいずれか１項に記載の照明装置。 The lighting device according to any one of claims 6 to 8, wherein the mounting portion is formed in a triangular prism shape.
  10. 　請求項１～９のいずれか１項に記載の照明装置と、
    　前記照明装置に照明される表示パネルとを備えることを特徴とする表示装置。     The lighting device according to any one of claims 1 to 9,
    A display device comprising a display panel illuminated by the illumination device.
PCT/JP2012/077533 2011-11-01 2012-10-25 Illumination device and display apparatus provided with same WO2013065558A1 (en)

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