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WO2012063676A1 - Dispositif d'éclairage, dispositif d'affichage, et dispositif de réception de télévision - Google Patents

Dispositif d'éclairage, dispositif d'affichage, et dispositif de réception de télévision Download PDF

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Publication number
WO2012063676A1
WO2012063676A1 PCT/JP2011/075145 JP2011075145W WO2012063676A1 WO 2012063676 A1 WO2012063676 A1 WO 2012063676A1 JP 2011075145 W JP2011075145 W JP 2011075145W WO 2012063676 A1 WO2012063676 A1 WO 2012063676A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheet
light source
fixing member
reflection sheet
substrate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2011/075145
Other languages
English (en)
Japanese (ja)
Inventor
敬治 清水
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Publication of WO2012063676A1 publication Critical patent/WO2012063676A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/54—Arrangements for reducing warping-twist

Definitions

  • the present invention relates to a lighting device, a display device, and a television receiver.
  • the liquid crystal display panel that displays images does not emit light, so an illumination device is installed on the back side of the liquid crystal display panel (the side opposite to the display surface side of the liquid crystal display panel)
  • the liquid crystal display panel is illuminated with light from the illumination device.
  • the illuminating device installed in the back surface side of a liquid crystal display panel is called the backlight unit etc., for example.
  • a cold cathode fluorescent lamp in which mercury or xenon is enclosed in a fluorescent tube is known.
  • the cold cathode fluorescent lamp is used as the light source of the backlight unit, there are disadvantages that the light emission luminance and life are insufficient, and that the luminance on the low-pressure side is low, making it difficult to obtain a uniform light emission. It was. Therefore, in order to eliminate such inconvenience, various backlight units using an LED (light emitting diode) package as a light source have been proposed in place of the cold cathode fluorescent lamp.
  • the backlight unit is roughly classified into two types, an edge light type and a direct type.
  • An edge-light type backlight unit has a light guide plate arranged directly under a liquid crystal display panel (a region facing the back surface of the liquid crystal display panel), and a light source arranged so as to face a predetermined side end surface of the light guide plate. It is.
  • the edge light type backlight unit when light is emitted from the light source, the light from the light source is introduced into the light guide plate through a predetermined side end surface of the light guide plate. Then, the light introduced into the light guide plate is emitted from the front surface of the light guide plate (the surface directed to the liquid crystal display panel side) to illuminate the liquid crystal display panel.
  • the direct type backlight unit has a light source arranged directly under the liquid crystal display panel.
  • Such a direct type backlight unit is advantageous for illuminating a large area with high output, and is often used for a large-sized liquid crystal display device.
  • a portion where light is absorbed is generally covered with a reflection sheet. Is.
  • the reflection sheet 103 is disposed on the mounting surface of the substrate 102.
  • an exposure hole 103a is formed in the reflection sheet 103, and the LED package 101 is exposed to the liquid crystal display panel 110 side from the exposure hole 103a of the reflection sheet 103 ( Protruding).
  • the portion 103b where the exposed hole 103a of the reflection sheet 103 is formed is recessed from the other portion 103c, thereby The LED package 101 exposed from the exposure hole 103a of the reflective sheet 103 may be surrounded by a reflective surface.
  • the reflection sheet 103 as shown in FIG. 10 is disclosed in, for example, Patent Document 1.
  • the reflection sheet 103 is securely held because the portion 103 c of the reflection sheet 103 is separated from the substrate 102. Therefore, as shown in FIG. 11, the reflection sheet 103 is lifted (warped) in some places. When the reflection sheet 103 is lifted in this way, light emitted from the LED package 101 goes around between the reflection sheet 103 and the substrate 102. As a result, there arises a disadvantage that the luminance is lowered or luminance unevenness occurs.
  • the present invention has been made to solve the above-described problems, and an object of the present invention is to provide an illumination device, a display device, and a television receiver capable of suppressing a decrease in luminance and occurrence of luminance unevenness.
  • an illumination device includes a light source, a light source substrate having a mounting surface on which the light source is mounted, an exposure hole for exposing the light source, and an exposure hole. And a reflection sheet disposed on the mounting surface of the light source substrate so that the light source is exposed. Further, if the portion of the reflective sheet in which the exposed hole is formed is the first portion and the peripheral portion of the first portion of the reflective sheet is the second portion, the reflective sheet is formed with respect to the first portion of the reflective sheet. Since the second portion protrudes in a direction away from the light source substrate, a gap is generated between the second portion of the reflection sheet and the light source substrate. A sheet fixing member is disposed in the gap between the second portion of the reflection sheet and the light source substrate, and the second portion of the reflection sheet is attached and fixed to the sheet fixing member.
  • the second part of the reflection sheet protrudes in the direction away from the light source substrate with respect to the first part of the reflection sheet, which means that the first part of the reflection sheet is in relation to the second part of the reflection sheet. That is, it is recessed in a direction approaching the light source substrate. For this reason, when the reflection sheet is arranged on the mounting surface of the light source substrate, the second portion of the reflection sheet is separated from the mounting surface of the light source substrate, while the first portion of the reflection sheet is on the mounting surface of the light source substrate. Closely.
  • the second portion of the reflective sheet (the periphery of the first portion) with respect to the first portion of the reflective sheet (the portion where the exposure hole for exposing the light source is formed).
  • a sheet fixing member is disposed in the gap between the second portion of the reflection sheet and the light source substrate, and the second portion of the reflection sheet is disposed on the sheet fixing member. Since the peripheral portion of the exposure hole in the reflection sheet is fixed by attaching and fixing, the floating of the peripheral portion of the exposure hole in the reflection sheet is reduced (or the exposure of the reflection sheet) The floating around the hole is eliminated).
  • the sheet fixing member is arranged in the gap between the second portion of the reflection sheet and the light source substrate, thereby providing a space for arranging the sheet fixing member. There is no need to secure it separately.
  • the sheet fixing member has a function as a spacer, and the interval between the second portion of the reflection sheet and the light source substrate is held by the sheet fixing member. If comprised in this way, it will become unnecessary to prepare the spacer for maintaining the space
  • an engagement hole is formed in the second portion of the reflective sheet, and at least a part of the sheet fixing member is engaged with the engagement hole, whereby the sheet fixing member
  • the second portion of the reflection sheet is in a state of being attached and fixed. If comprised in this way, the 2nd part of a reflective sheet can be attached and fixed to a sheet
  • the reflection sheet has to be removed for some reason by attaching and fixing the second portion of the reflection sheet to the sheet fixing member in this way, the second sheet of the reflection sheet can be easily removed from the sheet fixing member. The part can be removed.
  • an engagement protrusion that engages with the engagement hole is provided in the sheet fixing member. It may be done. If comprised in this way, at least one part (engagement protrusion) of a sheet
  • the second portion of the reflection sheet is sandwiched between the main body and the main body disposed in the gap between the second portion of the reflection sheet and the light source substrate.
  • a member including an attachment body attached to the main body is a sheet fixing member, and an engagement protrusion is provided on one of the main body and the attachment body, and on the other of the main body and the attachment body
  • a fixing hole into which the engaging protrusion is inserted and fixed may be formed, and the engaging protrusion may be inserted and fixed into the fixing hole in a state where the engaging protrusion is inserted and engaged with the engaging hole. If comprised in this way, it can suppress that the 2nd part of a reflective sheet remove
  • the sheet fixing member is a pin-shaped member, and the sheet fixing member
  • the pin-shaped member may be formed in a tapered shape in a direction away from the light source substrate. If comprised in this way, when the pin-shaped member as a sheet
  • the sheet fixing member (pin-shaped member) when the sheet fixing member (pin-shaped member) is inserted into the engagement hole, the second portion of the reflective sheet is stopped halfway without falling to the base of the sheet fixing member (pin-shaped member). Therefore, the interval between the second portion of the reflection sheet and the light source substrate is held by the sheet fixing member (pin-shaped member). That is, the sheet fixing member (pin-shaped member) can have a function as a spacer for maintaining a gap between the second portion of the reflection sheet and the light source substrate. For this reason, it is not necessary to separately prepare a spacer for maintaining a distance between the second portion of the reflection sheet and the light source substrate, and the number of parts is reduced.
  • the illumination device further includes a housing to which the light source substrate is mounted, a fastening portion for fastening and fixing the housing and the light source substrate is provided on the sheet fixing member.
  • a fastening portion for fastening and fixing the housing and the light source substrate is provided on the sheet fixing member. Is preferred. If comprised in this way, it will become unnecessary to prepare the fastening member for fastening and fixing a housing
  • the display device includes the illumination device according to the first aspect and a display panel illuminated with light from the illumination device.
  • the television receiver according to the third aspect of the present invention includes the display device according to the second aspect.
  • the television receiver configured in this way, it is possible to suppress a decrease in luminance and occurrence of luminance unevenness.
  • an illuminating device As described above, according to the present invention, it is possible to obtain an illuminating device, a display device, and a television receiver capable of suppressing a decrease in luminance and occurrence of luminance unevenness.
  • FIG. 2 is an enlarged cross-sectional view of the periphery of a sheet fixing member of the backlight unit shown in FIG. 1. It is a figure for demonstrating the fixing method of the reflective sheet by the sheet
  • This display device is a liquid crystal display device, and as shown in FIG. 1, is installed on a liquid crystal display panel (illuminated body) 10 for displaying an image and a back surface side opposite to the display surface side of the liquid crystal display panel 10.
  • the backlight unit 20 is provided at least.
  • the liquid crystal display panel 10 is an example of the “display panel” in the present invention
  • the backlight unit 20 is an example of the “illuminating device” in the present invention.
  • the liquid crystal display panel 10 has a display area where an image is actually displayed and a non-display area which is an outer edge area of the display area. A plurality of pixels arranged in a matrix are formed in the display area of the liquid crystal display panel 10.
  • Each of the plurality of pixels is driven by a switching element, a pixel electrode, a common electrode, and the like. Note that the switching element, the pixel electrode, and the common electrode are not shown in order to make the drawing easy to see, and wirings that are electrically connected to them are not shown.
  • the switching element is made of a TFT (thin film transistor), the gate of the switching element is connected to a gate line (scanning line), and the source of the switching element is connected to a source line (data line).
  • a pixel electrode is connected to the drain of the switching element, a common electrode is disposed so as to face the pixel electrode, and a liquid crystal (not shown) is sandwiched between the pixel electrode and the common electrode.
  • the switching elements are individually provided for each pixel, and the pixel electrodes are also individually provided for each pixel.
  • the common electrode is common to each pixel.
  • the backlight unit 20 employs a direct type system, emits white backlight light in a planar shape, and uniformly illuminates the back surface of the liquid crystal display panel 10 with the backlight light. ing.
  • the optical property (light transmittance) of the liquid crystal is changed for each pixel based on the video signal. Specifically, in each pixel, an electric field is generated between the pixel electrode and the common electrode by supplying predetermined power to the pixel electrode via the switching element. The orientation of the liquid crystal, that is, the transmittance of light transmitted through the liquid crystal is changed by the electric field generated between the pixel electrode and the common electrode.
  • the liquid crystal display panel 10 includes at least two transparent substrates 11 and 12.
  • One transparent substrate 11 is referred to as an active matrix substrate, and the other transparent substrate 12 may be referred to as a counter substrate because it is disposed opposite to the transparent substrate 11, or a color filter.
  • a switching element and a pixel electrode are formed, and a gate line (scanning line) and a source line (data line) electrically connected to them are also formed.
  • a common electrode is formed on a predetermined surface of the other transparent substrate 12.
  • a color filter is further formed on the predetermined surface of the other transparent substrate 12 as necessary.
  • Each predetermined surface of the two transparent substrates 11 and 12 is covered with an alignment film (not shown) capable of aligning the liquid crystal in a specific direction.
  • the two transparent substrates 11 and 12 are bonded to each other via a seal material (not shown) so that their predetermined surfaces face each other.
  • a liquid crystal is sealed between the two transparent substrates 11 and 12.
  • the liquid crystal is sandwiched between the pixel electrode and the common electrode (between the alignment film covering a predetermined surface of one transparent substrate 11 and the alignment film covering a predetermined surface of the other transparent substrate 12). ing.
  • the outer sizes of the two transparent substrates 11 and 12 are different from each other, and the outer size of the transparent substrate 11 is larger than the outer size of the transparent substrate 12. Accordingly, the two transparent substrates 11 and 12 are bonded to each other, but the predetermined ends of the transparent substrates 11 and 12 do not match each other, and a part of the predetermined surface of the transparent substrate 11 is separated from the transparent substrate 12. Exposed. The exposed portion of the predetermined surface of the transparent substrate 11 is a region of a non-display area, and is used for electrically connecting a driver (not shown) to the transparent substrate 11.
  • one polarizing sheet that transmits only light waves in a specific vibration direction is provided on each of the surfaces opposite to the predetermined surface (the liquid crystal side surface) of the two transparent substrates 11 and 12. It is affixed. The transmission axis directions of the two polarizing sheets are shifted from each other by about 90 °.
  • the backlight unit 20 installed on the back side of the liquid crystal display panel 10 includes at least a back chassis 21, a light emitting module 22, a reflection sheet 23, a diffusion plate 24, and an optical sheet 25.
  • the back chassis 21 is an example of the “housing” in the present invention.
  • the back chassis 21 is formed in a substantially box shape with the liquid crystal display panel 10 side opened. That is, the back chassis 21 has a bottom portion 21a that is a portion opposite to the opening side, and a side portion 21b that stands on the outer peripheral end of the bottom portion 21a. And the area
  • the light emitting module 22 is for generating light that is the basis of backlight light, and is housed in the housing area of the back chassis 21.
  • the light emitting module 22 is fixed in the housing area of the back chassis 21 by attaching the light emitting module 22 to the bottom 21 a of the back chassis 21.
  • the light emitting module 22 is mounted and fixed on the bottom surface (surface on the accommodation area side) of the bottom 21a of the back chassis 21. Therefore, in a state where the backlight unit 20 is installed on the back side of the liquid crystal display panel 10, the light emitting module 22 is disposed directly below the liquid crystal display panel 10 (a region facing the back side of the liquid crystal display panel 10).
  • the light emitting module 22 includes an LED package 26 as a light source (point light source) and an LED substrate 27 having a mounting surface on which the LED package 26 is mounted. Then, the LED package 26 mounted on the mounting surface of the LED substrate 27 actually generates the light that is the basis of the backlight light.
  • the LED package 26 is an example of the “light source” in the present invention
  • the LED substrate 27 is an example of the “substrate” in the present invention.
  • the structure of the LED package 26 is not particularly limited.
  • the LED package 26 is a combination of a phosphor that converts blue light into yellow and a blue LED element. Or you may combine the fluorescent substance and blue LED element which each convert blue light into green and red, and may combine three types of LED elements, a blue LED element, a green LED element, and a red LED element.
  • the LED packages 26 are mounted in a plurality, and the plurality of LED packages 26 are arranged in a matrix when viewed in plan from the opening side of the back chassis 21, although not shown. It has become.
  • the number of LED packages 26 to be mounted is not particularly limited, and can be changed as appropriate according to the application.
  • the reflection sheet 23 is for reflecting the light emitted from the LED package 26 toward the opening side (the liquid crystal display panel 10 side) of the back chassis 21, and in the accommodation area of the back chassis 21 together with the light emitting module 22. Contained. As a shape of this reflection sheet 23, it has the bottom part 23a and the diagonally inclined side part 23b standingly arranged in the outer peripheral end of the bottom part 23a.
  • the bottom 23 a of the reflection sheet 23 is placed on the bottom surface of the bottom 21 a of the back chassis 21 with the LED substrate 27 interposed therebetween. That is, the bottom 23 a of the reflection sheet 23 covers the mounting surface of the LED substrate 27.
  • the LED package 26 mounted on the LED substrate 27 is also covered with the bottom portion 23 a of the reflection sheet 23. Therefore, the same number of exposure holes 23c as the LED packages 26 are formed in the bottom 23a of the reflection sheet 23 in order to expose the LED packages 26 to the opening side (the liquid crystal display panel 10 side) of the back chassis 21. Then, one LED package 26 is exposed (projected) to the opening side of the back chassis 21 from each of the exposed holes 23 c of the reflection sheet 23.
  • the bottom 23a of the reflection sheet 23 is not flat, but is uneven. Specifically, if the portion of the bottom 23a of the reflection sheet 23 where the exposed hole 23c is formed is a light source exposed portion 23d, and the peripheral portion of the light source exposed portion 23d is a light source peripheral portion 23e, the light source exposed portion
  • the light source peripheral portion 23e of the reflection sheet 23 is convex because the light source peripheral portion 23e protrudes in a direction away from the LED substrate 27 (a direction toward the opening side of the back chassis 21) with respect to 23d. .
  • the light source exposed portion 23d of the reflective sheet 23 is recessed in the direction closer to the LED substrate 27 with respect to the light source peripheral portion 23e, so that the light source exposed portion 23d of the reflective sheet 23 is concave. Therefore, when the bottom 23 a of the reflection sheet 23 is disposed on the mounting surface of the LED substrate 27, the light source exposed portion 23 d of the reflection sheet 23 is brought into close contact with the mounting surface of the LED substrate 27. On the other hand, the light source peripheral portion 23 e of the reflection sheet 23 is separated from the mounting surface of the LED substrate 27. That is, a gap is generated between the light source peripheral portion 23 e of the reflection sheet 23 and the LED substrate 27.
  • the light source exposed portion 23d is a portion corresponding to the “first portion” of the present invention
  • the light source peripheral portion 23e is a portion corresponding to the “second portion” of the present invention.
  • surroundings of the LED package 26 will be in the state surrounded by the reflective surface. Therefore, the light emitted from the LED package 26 is efficiently advanced toward the opening side (the liquid crystal display panel 10 side) of the back chassis 21.
  • the diffusion plate 24 is for introducing light emitted from the LED package 26 and diffusing and emitting the light toward the liquid crystal display panel 10 side, and is arranged so as to close the opening of the back chassis 21. .
  • the LED package 26 is covered by the diffusion plate 24 from the opening side (the liquid crystal display panel 10 side) of the back chassis 21. Thereby, when light is emitted from the LED package 26, the light is introduced into the diffusion plate 24.
  • the optical sheet 25 is a sheet group including a diffusion sheet, a prism sheet, and the like, and is disposed on the diffusion plate 24. For this reason, when light is emitted from the diffusion plate 24, the optical sheet 25 diffuses or collects the light. Note that the type and the number of sheets used of the optical sheet 25 are appropriately changed according to the application.
  • the backlight unit 20 is further provided with a sheet fixing member 28 as shown in FIGS. Then, the light source peripheral portion 23e of the reflection sheet 23 is fixed using the sheet fixing member 28.
  • the sheet fixing member 28 for fixing the light source peripheral portion 23e of the reflection sheet 23 is made of a highly reflective material (for example, polycarbonate resin containing titanium oxide or barium sulfate), and can be attached to the main body 28a and the main body 28a. And a mounting member 28b.
  • the light source peripheral portion 23e of the reflection sheet 23 is fixed by the sheet fixing member 28 by the main body 28a and the attachment body 28b.
  • a fixing hole (non-through hole) 28c is formed in the main body 28a, and an engaging protrusion (protrusion having a barb at the tip) 28d inserted and fixed in the fixing hole 28c of the main body 28a.
  • an engagement hole 23f into which the engagement protrusion 28d of the attachment body 28b is inserted and engaged is formed at the apex of the light source peripheral portion 23e of the reflection sheet 23.
  • the light source peripheral portion 23e of the reflection sheet 23 is sandwiched between the main body 28a and the attachment body 28b, and the engagement protrusions 28d of the attachment body 28b are inserted and engaged in the engagement holes 23f of the reflection sheet 23.
  • the engaging projection 28d of the mounting body 28b is inserted and fixed in the fixing hole 28c of the main body 28a. Thereby, the light source peripheral portion 23e of the reflection sheet 23 is attached and fixed to the sheet fixing member 28.
  • the main body 28a or the attachment body 28b is connected to the light source peripheral portion 23e of the reflection sheet 23 and the LED. It must be placed in the gap between the substrate 27. Therefore, in this embodiment, the main body 28 a is arranged in the gap between the light source peripheral portion 23 e of the reflection sheet 23 and the LED substrate 27.
  • the main body 28a functions as a spacer for maintaining a space between the light source peripheral portion 23e of the reflection sheet 23 and the LED substrate 27. Become. In the first embodiment, the main body 28a actually functions as a spacer.
  • a fastening portion (a portion having a barb at the tip) 28e is integrally provided on a portion of the main body 28a opposite to the portion where the fixing hole 28c is formed.
  • the bottom portion 21a of the back chassis 21 and the LED substrate 27 are fastened and fixed by the fastening portion 28e of the main body 28a.
  • the bottom portion 21a of the back chassis 21 and the LED substrate 27 are fastened and fixed by the fastening portion 28e of the main body 28a, so that the main body 28a itself is fixed to the LED substrate 27 (the bottom portion 21a of the back chassis 21). It is in a state. That is, the light source peripheral portion 23e of the reflection sheet 23 is fixed to the LED substrate 27 (the bottom portion 21a of the back chassis 21).
  • the structure of the television receiver to which the liquid crystal display device of the first embodiment (the liquid crystal display panel 10 and the backlight unit 20) is attached is as shown in FIG.
  • a liquid crystal display device including the liquid crystal display panel 10 and the backlight unit 20 described above is connected to the power source 1 and the tuner 2.
  • the liquid crystal display device including the liquid crystal display panel 10 and the backlight unit 20 is sandwiched between the front cabinet 3 and the back cabinet 4 with the power source 1 and the tuner 2 connected thereto, and is attached to the back cabinet 4.
  • the stand 5 is held.
  • the light source peripheral portion 23e of the reflective sheet 23 is used in the configuration in which the light source peripheral portion 23e protrudes in the direction away from the LED substrate 27 with respect to the light source exposed portion 23d of the reflective sheet 23, the light source peripheral portion 23e of the reflective sheet 23 is used.
  • the sheet fixing member 28 is disposed in the gap between the LED substrate 27 and the light source peripheral portion 23e of the reflection sheet 23 is attached and fixed to the sheet fixing member 28, so that the periphery of the exposure hole 23c in the reflection sheet 23 is fixed. Since the portion is in a fixed state, the floating portion around the exposed hole 23c in the reflective sheet 23 becomes small (or the floating portion around the exposed hole 23c in the reflective sheet 23 does not float).
  • the sheet fixing member 28 is disposed in the gap between the light source peripheral portion 23e of the reflection sheet 23 and the LED substrate 27, thereby disposing the sheet fixing member 28. There is no need to secure a separate space.
  • the sheet fixing member 28 by providing the sheet fixing member 28 with a function as a spacer, the distance between the light source peripheral portion 23e of the reflection sheet 23 and the LED substrate 27 is maintained. Since it is not necessary to prepare a spacer separately, the number of parts can be reduced.
  • the engagement hole 23f in the light source peripheral portion 23e of the reflection sheet 23 a part of the sheet fixing member 28 is attached to the engagement hole 23f of the reflection sheet 23. If engaged, the light source peripheral portion 23e of the reflection sheet 23 can be easily attached and fixed to the sheet fixing member 28.
  • the sheet fixing member 28 by attaching and fixing the light source peripheral portion 23e of the reflection sheet 23 to the sheet fixing member 28 by such a method, when the reflection sheet 23 has to be removed for some reason, the sheet fixing member is easily obtained.
  • the light source peripheral portion 23e of the reflection sheet 23 can be removed from the reflection sheet.
  • the sheet fixing member 28 with an engagement protrusion 28d that engages with the engagement hole 23f of the reflection sheet 23 a part of the sheet fixation member 28 (engagement) can be easily formed in the engagement hole 23f of the reflection sheet 23.
  • the mating protrusions 28d) can be engaged.
  • the light source peripheral portion 23e of the reflection sheet 23 is sandwiched between the main body (a member disposed in the gap between the light source peripheral portion 23e of the reflection sheet 23 and the LED substrate 27) 28a and the attachment body (the main body 28a).
  • a member including a member 28b, which is disposed and attached to the main body 28a, is used as the sheet fixing member 28, and a fixing hole 28c into which the engaging protrusion 28d is inserted and fixed is formed in the main body 28a, and the engaging protrusion is formed in the attaching body 28b.
  • the engaging projection 28d of the mounting body 28b is inserted into the fixing hole 28c of the main body 28a in a state where the engaging projection 28d of the mounting body 28b is inserted and engaged with the engaging hole 23f of the reflection sheet 23. If fixed, it is possible to prevent the light source peripheral portion 23e of the reflection sheet 23 from being detached from the sheet fixing member 28. Thereby, the light source peripheral portion 23e of the reflection sheet 23 is more reliably fixed by the sheet fixing member 28.
  • the fastening portion 28e for fastening and fixing the bottom portion 21a of the back chassis 21 and the LED substrate 27 is provided on the seat fixing member 28 (main body 28a), thereby the back chassis 21. There is no need to separately prepare a fastening member for fastening and fixing the bottom 21a of the LED and the LED board 27, and the number of parts is reduced.
  • the fastening portion 28e for fastening and fixing the bottom portion 21a of the back chassis 21 and the LED substrate 27 may not be provided in the sheet fixing member 28 (main body 28a). That is, as shown in FIG. 5, the sheet fixing member 28 (main body 28 a) may be attached only to the LED board 27. However, in this case, it is necessary to separately prepare a fastening member for fastening and fixing the bottom portion 21a of the back chassis 21 and the LED substrate 27.
  • an engagement protrusion 28d may be provided in the main body 28a, and a fixing hole 28c into which the engagement protrusion 28d of the main body 28a is inserted and fixed may be formed in the attachment body 28b.
  • the light source peripheral portion 23e of the reflection sheet 23 is fixed by the sheet fixing member 38 as shown in FIGS.
  • the sheet fixing member 38 of the second embodiment is made up of one member (a member corresponding to the main body 28a of the first embodiment) having a highly reflective material as a constituent material.
  • the sheet fixing member 38 itself is arranged in the gap between the light source peripheral portion 23e of the reflection sheet 23 and the LED substrate 27, and the interval between the light source peripheral portion 23e of the reflection sheet 23 and the LED substrate 27 is set. It functions as a spacer for holding.
  • an engagement protrusion 38 a is integrally provided on the sheet fixing member 38, and the engagement protrusion 38 a of the sheet fixing member 38 is inserted and engaged with the engagement hole 23 f of the reflection sheet 23.
  • the light source peripheral portion 23e of the reflection sheet 23 is attached and fixed to the sheet fixing member 38.
  • a fastening portion 38b for fastening and fixing the bottom portion 21a of the back chassis 21 and the LED board 27 is integrally formed on a portion of the seat fixing member 38 opposite to the portion provided with the engagement protrusion 38a. Is provided.
  • the bottom 21a of the back chassis 21 and the LED board 27 are fastened and fixed by the fastening part 38b of the sheet fixing member 38, so that the sheet fixing member 38 itself is attached to the LED board 27 (the bottom 21a of the back chassis 21). Is fixed. Thereby, the light source peripheral portion 23e of the reflection sheet 23 is fixed to the LED substrate 27 (the bottom portion 21a of the back chassis 21).
  • the other configuration of the second embodiment is the same as the configuration of the first embodiment, and a detailed description thereof will be omitted.
  • the light source peripheral portion 23e of the reflection sheet 23 is not sandwiched by the sheet fixing member 38, and thus the light source peripheral portion 23e of the reflection sheet 23 is easily detached from the sheet fixing member 38. End up.
  • the reflection sheet 23 has to be removed for some reason, the effect of removing the reflection sheet 23 becomes easier.
  • the sheet fixing member 38 is made of one member, the number of parts can be reduced accordingly.
  • the light source peripheral portion 23e of the reflection sheet 23 is fixed by the sheet fixing member 48 as shown in FIGS.
  • the sheet fixing member 48 of the third embodiment is made of a highly reflective material as a constituent material, and is composed of a pin-shaped member that tapers in a direction away from the LED substrate 27.
  • the sheet fixing member (pin-shaped member) 48 is inserted into and engaged with the engagement hole 23 f of the reflection sheet 23.
  • the pin-like member as the sheet fixing member 48 is used as the engagement hole 23f of the reflection sheet 23.
  • the light source surrounding portion (the portion where the engagement hole 23 f is formed) 23 e of the reflection sheet 23 is stopped and locked halfway without falling down to the base of the sheet fixing member (pin-shaped member) 48. That is, the light source peripheral portion 23e of the reflection sheet 23 is attached and fixed to the sheet fixing member (pin-shaped member) 48.
  • the floating portion around the exposed hole 23c in the reflective sheet 23 becomes less lifted (or the lifted portion around the exposed hole 23c in the reflective sheet 23 disappears), so that the LED The wraparound of the light emitted from the package 26 between the reflection sheet 23 and the LED substrate 27 is avoided, and the decrease in luminance and the occurrence of luminance unevenness are suppressed.
  • the sheet fixing member (pin-shaped member) 48 when the sheet fixing member (pin-shaped member) 48 is inserted into the engagement hole 23f of the reflection sheet 23, the light source peripheral portion 23e of the reflection sheet 23 is replaced with the sheet fixing member ( The pin-like member) 48 is stopped and stopped halfway without falling to the base of the sheet 48, so that the interval between the light source peripheral portion 23 e of the reflection sheet 23 and the LED substrate 27 is maintained. Will be done by. That is, the sheet fixing member (pin-shaped member) 48 can have a function as a spacer for maintaining a distance between the light source peripheral portion 23e of the reflection sheet 23 and the LED substrate 27. For this reason, it is not necessary to separately prepare a spacer for maintaining the space between the light source peripheral portion 23e of the reflection sheet 23 and the LED substrate 27, and the number of parts is reduced.
  • the sheet fixing member (pin-shaped member) 48 is formed of one member, the number of parts can be further reduced accordingly.
  • the sheet fixing member (pin-shaped member) 48 is simply inserted into the engagement hole 23f of the reflection sheet 23. Therefore, the reflection sheet 23 is removed for some reason. When it is necessary, the work of removing the reflection sheet 23 is further facilitated.
  • a fastening portion for fastening and fixing the bottom portion 21a of the back chassis 21 and the LED substrate 27 may be provided in the sheet fixing member 48. That is, a fastening portion similar to the fastening portion 28e provided on the seat fixing member 28 of the first embodiment may be provided on the seat fixing member 48 of the third embodiment.
  • the present invention is not limited thereto, and the lighting device installed in a display device other than the liquid crystal display device is used.
  • the present invention may be applied.
  • Liquid crystal display panel (display panel) 20 Backlight unit (lighting device) 21 Back chassis (housing) 23 Reflective sheet 23c Exposed hole 23d Light source exposed part (first part) 23e Light source surrounding part (second part) 23f engagement hole 26 LED package (light source) 27 LED substrate (substrate) 28, 38, 48 Seat fixing member 28a Main body 28b Mounting body 28c Fixing hole 28d, 38a Engaging projection 28e, 38b Fastening portion

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

L'invention concerne un dispositif d'éclairage permettant de limiter les baisses de luminance ainsi que l'apparition d'irrégularités de luminance. Ce dispositif d'éclairage est équipé d'une feuille de réflexion (23) qui possède un trou d'exposition (23c), et qui est disposée sur un substrat de DEL (27) de manière à ce qu'un boîtier de DEL (26) soit exposé par le trou d'exposition (23c). D'autre part, une section périphérique source de lumière (23e) fait saillie dans une direction s'éloignant du substrat de DEL (27) par rapport à une section d'exposition de source de lumière (23d) située sur la feuille de réflexion (23); un matériau de fixation de feuille (28) est disposé dans un intervalle formé entre la section périphérique source de lumière (23e) et le substrat de DEL (27); et la section périphérique source de lumière (23e) est installée et fixée sur ce matériau de fixation de feuille (28).
PCT/JP2011/075145 2010-11-08 2011-11-01 Dispositif d'éclairage, dispositif d'affichage, et dispositif de réception de télévision Ceased WO2012063676A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-249748 2010-11-08
JP2010249748 2010-11-08

Publications (1)

Publication Number Publication Date
WO2012063676A1 true WO2012063676A1 (fr) 2012-05-18

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PCT/JP2011/075145 Ceased WO2012063676A1 (fr) 2010-11-08 2011-11-01 Dispositif d'éclairage, dispositif d'affichage, et dispositif de réception de télévision

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103511991A (zh) * 2013-08-15 2014-01-15 厦门华侨电子股份有限公司 一种led背光模组中反射片的固定结构
EP2690488B1 (fr) * 2012-07-24 2016-11-23 Boe Technology Group Co. Ltd. Unité de rétroéclairage et dispositif d'affichage
JP2017502492A (ja) * 2014-11-11 2017-01-19 ウルト エレクトロニク アイソス ゲーエムベーハー ウント コンパニー カーゲー 回路基板取り付け用取り付け部材並びに当該取り付け部材で複数の回路基板を隔置接続する取り付け装置及び方法
JP2017037832A (ja) * 2015-08-11 2017-02-16 キヤノン株式会社 発光装置および画像表示装置
EP3764155A4 (fr) * 2018-03-07 2021-12-08 LG Electronics Inc. Dispositif d'affichage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0660187U (ja) * 1993-01-12 1994-08-19 日新電機株式会社 平行板固定装置
JP2003249775A (ja) * 2002-02-26 2003-09-05 Yazaki Corp 計器の基板固定構造
JP2005293994A (ja) * 2004-03-31 2005-10-20 Sankyo Kobunshi Kk 照明灯具
JP2007157451A (ja) * 2005-12-02 2007-06-21 Sharp Corp 拡散板支持部材、バックライト装置、及び表示装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0660187U (ja) * 1993-01-12 1994-08-19 日新電機株式会社 平行板固定装置
JP2003249775A (ja) * 2002-02-26 2003-09-05 Yazaki Corp 計器の基板固定構造
JP2005293994A (ja) * 2004-03-31 2005-10-20 Sankyo Kobunshi Kk 照明灯具
JP2007157451A (ja) * 2005-12-02 2007-06-21 Sharp Corp 拡散板支持部材、バックライト装置、及び表示装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2690488B1 (fr) * 2012-07-24 2016-11-23 Boe Technology Group Co. Ltd. Unité de rétroéclairage et dispositif d'affichage
CN103511991A (zh) * 2013-08-15 2014-01-15 厦门华侨电子股份有限公司 一种led背光模组中反射片的固定结构
JP2017502492A (ja) * 2014-11-11 2017-01-19 ウルト エレクトロニク アイソス ゲーエムベーハー ウント コンパニー カーゲー 回路基板取り付け用取り付け部材並びに当該取り付け部材で複数の回路基板を隔置接続する取り付け装置及び方法
JP2017037832A (ja) * 2015-08-11 2017-02-16 キヤノン株式会社 発光装置および画像表示装置
EP3764155A4 (fr) * 2018-03-07 2021-12-08 LG Electronics Inc. Dispositif d'affichage

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