WO2009084379A1 - Dispositif de source de lumière et dispositif d'affichage à cristaux liquides - Google Patents

Dispositif de source de lumière et dispositif d'affichage à cristaux liquides Download PDF

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Publication number
WO2009084379A1
WO2009084379A1 PCT/JP2008/072258 JP2008072258W WO2009084379A1 WO 2009084379 A1 WO2009084379 A1 WO 2009084379A1 JP 2008072258 W JP2008072258 W JP 2008072258W WO 2009084379 A1 WO2009084379 A1 WO 2009084379A1
Authority
WO
WIPO (PCT)
Prior art keywords
light source
housing
guide plate
light
optical
Prior art date
Application number
PCT/JP2008/072258
Other languages
English (en)
Japanese (ja)
Inventor
Masanori Mori
Mamoru Yabe
Original Assignee
Omron Corporation
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 Omron Corporation filed Critical Omron Corporation
Priority to KR1020107002172A priority Critical patent/KR101121599B1/ko
Priority to CN2008801030401A priority patent/CN101779074B/zh
Publication of WO2009084379A1 publication Critical patent/WO2009084379A1/fr

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0277—Bendability or stretchability details
    • H05K1/028—Bending or folding regions of flexible printed circuits
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • G02F1/1345—Conductors connecting electrodes to cell terminals
    • G02F1/13452—Conductors connecting driver circuitry and terminals of panels
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • 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
    • G02F2201/50—Protective arrangements
    • G02F2201/503—Arrangements improving the resistance to shock
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/11—Printed elements for providing electric connections to or between printed circuits
    • H05K1/117—Pads along the edge of rigid circuit boards, e.g. for pluggable connectors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • H05K1/147—Structural association of two or more printed circuits at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H05K1/189—Printed circuits structurally associated with non-printed electric components characterised by the use of a flexible or folded printed circuit
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10106—Light emitting diode [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10189—Non-printed connector
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/20—Details of printed circuits not provided for in H05K2201/01 - H05K2201/10
    • H05K2201/2027—Guiding means, e.g. for guiding flexible circuits

Definitions

  • the present invention relates to a light source device used as a backlight device disposed behind a liquid crystal panel, for example, and a liquid crystal display device in which the light source device and a liquid crystal panel are combined.
  • Patent Document 1 discloses a liquid crystal display device in which a liquid crystal panel and a light source device (backlight device) are combined.
  • the light source device includes a housing having a planar opening (planar light emitting unit) facing the liquid crystal panel.
  • the housing accommodates a reflective sheet, a light guide plate, and a plurality of optical sheets in order from the opposite side (bottom plate side) of the planar opening.
  • One side surface of the light guide plate (the end surface connecting the front surface and the back surface in contact with the reflection sheet and the optical sheet) is used as a light incident surface, and a plurality of light sources are arranged facing the light incident surface.
  • the plurality of light sources are fixed to a flexible printed circuit board and are electrically connected to a circuit provided on the wiring board.
  • the flexible printed circuit board is led out to the outside through a wiring lead-out part (opening part) formed on the side part of the housing.
  • the flexible printed circuit board is usually electrically connected to the power circuit of the circuit board mounted on the back surface (the surface opposite to the liquid crystal panel) of the housing. For this reason, the flexible printed circuit board led out from the side of the housing is usually bent once at a location protruding from the side of the housing, and then bent again at the corner that connects the side and back of the housing. Arranged along.
  • the flexible printed circuit board has a structure in which a conductive foil (thickness: about 10-50 ⁇ m) is formed on a thin insulating film (thickness: about 10-50 ⁇ m), it is damaged by external force. Easy to do. Therefore, when the housing is configured by combining an upper housing part (chassis on the side of the liquid crystal panel) and a lower housing (chassis on the side opposite to the liquid crystal panel), the flexible print that protrudes from the housing when these two housing parts are combined. There is a problem that the substrate is damaged, and a problem that the insulating film of the flexible printed circuit board is damaged due to contact with the edge of the housing forming the wiring lead-out portion.
  • Patent Document 2 discloses a technique for covering and protecting a flexible printed circuit board derived from a housing.
  • the technique of Patent Document 2 uses an independent protective member, there is a problem that the number of parts increases.
  • the present invention provides a technique for protecting a flexible printed circuit board that electrically connects a light source and a light source driving circuit in a light source device and a liquid crystal display device without increasing the number of components.
  • a light guide plate, a light source, and at least one optical sheet are housed in an optical element housing space formed by a housing, and light incident on the light guide plate from the light source is received.
  • the wire lead-out unit includes a wiring lead-out part formed in the housing and an electric circuit connected to the light source
  • a wiring protection part is provided.
  • the flexible printed circuit board since the circuit connection portion led out from the housing is covered with the optical sheet and protected, the flexible printed circuit board includes the housing and the circuit connection portion. There is no direct contact with the edge of the board. Therefore, the flexible printed circuit board is not damaged during manufacture or use of the light source device.
  • FIG. 1 is a rear perspective view of a liquid crystal display device according to the present invention.
  • FIG. 4 is a development view of the optical sheet (reflective sheet) shown in FIGS. 2 and 3.
  • the perspective view which shows the procedure which protects a wiring board using the wiring protection part formed in the reflective sheet of FIG.
  • FIG. 8 is a development view of the wiring protection unit shown in FIG. 7.
  • FIG. 10 is a development view of the wiring protection unit shown in FIG. 9.
  • FIG. 1 is a view of the liquid crystal display device as viewed from behind.
  • the illustrated liquid crystal display device 10 includes a liquid crystal panel 12, a light source device (backlight device) 14 disposed behind the liquid crystal panel 12, and a drive circuit 16 disposed behind the light source device 14.
  • the drive circuit 16 has a printed wiring board 18.
  • the printed wiring board 18 includes, for example, a plurality of driving electronic components 20 on a surface located on the opposite side of the light source device 14, and is connected to the liquid crystal panel 12 by a flexible printed circuit board 22 disposed beyond the side surface of the light source device 14.
  • the light source device 14 is electrically connected and is electrically connected to the light source device 14 (a light source to be described later) by a flexible printed board 24 drawn to the back from one side of the back surface of the light source device 14.
  • the light source device 14 has a housing 26 that forms a rectangular space for accommodating a plurality of optical components described later.
  • the housing 26 includes a housing part (lower housing part 28, which appears upward in FIG. 1) located on the drive circuit side, and a housing part (upper housing part 30, which appears on the lower side in FIG. 1). Have). 2 to 4 and particularly FIG. 4, the lower housing portion 28 has a rectangular bottom plate 32 and side plates 34 rising vertically from four sides thereof, and is formed, for example, by bending a single metal plate. Yes.
  • the upper housing portion 30 includes a rectangular frame (not shown) that forms a planar light emitting portion (opening), and a frame side plate 36 (see FIG. 1) that rises vertically from the four sides of the frame.
  • the lower housing portion 28 and the upper housing portion 30 are combined so that the frame side plate 36 of the upper housing portion 30 is positioned outside the side plate 34 of the lower housing 28, and the optical element accommodating space 38 is disposed inside the combined housing 26. (See FIG. 4) is formed.
  • the light source unit 40 is disposed on the inner surface of one of the long side direction side plates 34 (34a).
  • the light source unit 40 includes a strip-shaped flexible printed circuit board 24 having a lateral width that is equal to or slightly smaller than the height of the side plate 34a.
  • An electric circuit is integrally formed on the flexible printed circuit board 24.
  • a plurality of light sources 42 are fixed to one side of one end of the flexible printed circuit board 24 at a predetermined interval, and they are electrically connected to a power supply circuit formed on the flexible printed circuit board 24.
  • the flexible printed circuit board 24 having such a configuration is fixed to the inner surface of the side plate 34a by appropriate fixing means (for example, double-sided tape) with the plurality of light sources 42 facing the inside of the accommodation space 38.
  • the circuit connecting portion 44 on the other end side of the flexible printed circuit board 24 is an opening formed by cutting out a part of the side plate 34b in the short side direction adjacent to the side plate 34a. It is led out from the wiring lead-out part 46 of the part.
  • a reflection sheet 48 that is one of optical sheets is accommodated in the accommodation space 38.
  • the reflection sheet 48 has a bottom portion 50 that faces the bottom plate 32 and a side portion 52 that faces the four side plates 34.
  • the side portion 52 a facing the side plate 34 a to which the light source unit 40 is attached has an opening 54 formed by notching a portion corresponding to the light source 42, and the light source 42 is exposed from these openings 54.
  • the reflection sheet 48 is integrally formed with a wiring protection part 60 for protecting the circuit connection part 44 led out from the housing 26 of the flexible printed circuit board 24 described above.
  • a light guide plate 56 is accommodated inside the space surrounded by the reflection sheet 48.
  • the light guide plate 56 is a substantially rectangular plate made of a translucent material having a thickness close to the height of the accommodation space 38 of the lower housing portion 28, and one longitudinal side surface (light incident surface) is opposed to the plurality of light sources 42. It is held in the state.
  • One or a plurality of optical sheets 58 are placed on the light exit surface 57 of the light guide plate 56.
  • the optical sheet 58 includes optical films such as a diffusion sheet and a prism sheet.
  • the upper housing portion 30 is disposed on the lower housing portion 28 in which the reflection sheet 48, the light guide plate 56, and the optical sheet 58 are accommodated.
  • the side plate 34 of the lower housing portion 28 is covered with the corresponding side plate 36 of the upper housing portion 30.
  • the wiring protection unit 60 will be described. As shown in FIG. 5, the wiring protector 60 is in the vicinity of the first extended portion 62 extending the long side end portion in the vicinity of the wiring lead-out portion 46 of the bottom portion 50 and the wiring lead-out portion 46 in the bottom portion 50. It has the 2nd expansion
  • the first extension portion 62 is a connecting portion (first bent portion) between the first extension portion 62 and the bottom 50 when the reflection sheet 48 is attached to the lower housing portion 28. 66) and is disposed along the lower housing side plate 34a.
  • the first extending portion 62 extends from the vicinity of the light source 42 arranged at the right end portion of the drawing to the end portion of the side plate 34 (right end portion of the drawing), and a circuit existing behind the first extending portion 62. It is preferable to cover the connecting portion 44.
  • the first extending portion 62 includes a first covering portion 68 that covers the inner surface of the side plate 34a and a second covering portion 70 that extends outward from the side plate 34a.
  • the second covering portion 70 and the second covering portion 70 are connected to the second covering portion 70 as shown in FIG. It is bent at the second bent portion 72 between the covering portions 70, and the second covering portion 70 covers the light guide plate side surface portion 74 located at the wiring lead-out portion 46.
  • the end portion of the second covering portion 70 extends downward in the drawing in a state where the second covering portion 70 is disposed on the side surface portion 74 of the light guide plate 56, and a part of the wiring lead-out portion 46 (the circuit later)
  • the second extending portion 64 has the slot 80 formed at the location where the third covering portion 78 passes. Therefore, the third covering portion 78 can project downward in the figure through the slot 80 without interfering with the second extending portion 64 (see FIG. 6D).
  • the circuit connecting portion 44 of the flexible printed circuit board 24 is bent at the first fold 82 corresponding to the second bent portion 72, and the second It arrange
  • circuit connecting portion 44 is folded along a second fold line 84 that crosses the circuit connecting portion 44 obliquely (with an angle of about 45 degrees) in the vicinity of the third covering portion 78, Along the portion 78, it is pulled out downward through the slot 80. Thereafter, the second extending portion 64 is bent at the connecting portion (the fourth bent portion 86 (see FIG. 6B)) between the second extending portion 64 and the bottom portion 50, and the second covering portion 70. Is overlaid on the circuit connection 44 located above (see FIG. 6E).
  • extension part 64 is upward from the surface of the light-guide plate 56, as shown in FIG.6 (e). It has a fifth covering portion 92 that protrudes and is bent at the fifth bent portion 90 and disposed on the light guide plate 56.
  • the fifth cover portion 92 is fixed to the light guide plate 56 by a double-sided tape 94 provided between the fifth cover portion 92 and the light guide plate 56 while being placed on the surface of the light guide plate 56. As shown in FIGS.
  • the circuit connection portion 44 protruding from the bottom plate of the lower housing 26 is disposed along the back surface of the lower housing 26, and a terminal 96 provided at an end portion of the circuit connection portion 44 is printed wiring. It is connected to a terminal connection part 98 provided on the plate 18.
  • the flexible printed circuit board 24 supporting the plurality of light sources 42 is protected by the circuit connection portion 44 led out from the housing 26 being covered with the reflection sheet 48. ing. For this reason, the circuit connecting portion 44 does not directly touch the edge of the plate constituting the housing 26. Further, when the upper housing part 30 is mounted on the lower housing 26, the edge part of the upper housing part 30 does not directly contact the circuit connection part 44. Therefore, the flexible printed circuit board 24 is not damaged during the manufacture of the light source device 14.
  • the target configuration can be obtained by simple modification by simply changing a part of the configuration of the conventional light source device.
  • the wiring protection unit 60 not only covers and protects the flexible printed circuit board 24 but also covers the side surface of the light guide plate 56 in the vicinity of the wiring lead-out unit 46, and therefore leaks from the side surface of the light guide plate 56. Since all the light is returned to the light guide plate 56, it is possible to obtain planar light emission with uniform brightness.
  • the wiring protection unit is not limited to the above-described form.
  • the wiring protection unit 100 in the form shown in FIGS. 7 and 8 is applied to a light source device in which the light source unit 40 is disposed along the bottom plate 32 of the lower housing unit 28.
  • the wiring protection unit 100 includes an extension unit 104 provided integrally with the reflection sheet 48.
  • the extending portion 104 includes a first covering portion 106 that extends from the bottom portion 48 toward the side plate 34 a and a second covering portion 108 that further extends the first covering portion 106.
  • the first covering portion 106 protects the back surface (the surface facing the bottom plate 32) of the circuit connecting portion 44.
  • the second covering portion 108 is bent at the bent portion 110 at the boundary with the first covering portion 106 to protect the surface of the circuit connecting portion 44 (the surface on the opposite side of the bottom plate 32). As shown in FIG. 7, the size of the first covering portion 106 and the second covering portion 108 protrudes through the wiring lead-out portion 46, and the circuit connection portion 44 is directly on the housing edge 112 of the wiring lead-out portion 46. It is preferable not to contact.
  • the wiring protection portion is provided on the reflection sheet (optical sheet) 48, but may be provided on another optical sheet 58 disposed on the opposite side of the reflection sheet 48 with the light guide plate 56 interposed therebetween.
  • the wiring protector 120 is integrally formed on one optical sheet 58 that covers the surface of the light guide plate 56.
  • the wiring protection unit 120 includes an extending portion 124 that protrudes from the edge of the region 122 that contacts the surface of the light guide plate 56 toward the side plate 34 a.
  • the extension part 124 has three covering parts (a first covering part 126, a second covering part 128, and a third covering part 130) in order from the region 122 side.
  • the optical sheet 58 is bent by approximately 90 degrees at the bent portion 132 at the boundary between the first covering portion 126 and the second covering portion 128, and then The tube 136 is formed by folding at the bent portion 134 at the boundary between the second cover portion 128 and the third cover portion 130, and the circuit connection portion 46 is inserted into the tube 136. Thereafter, the region 122 of the optical sheet 58 is overlaid on the light guide plate 56.
  • the size of the wiring protection part 120 is determined so that the tube 136 formed by bending the wiring protection part 120 protrudes outside via the wiring lead-out part 46, as shown in FIG. It is preferable.
  • the wiring lead-out part is formed by cutting off a part of the side plate 34 of the lower housing part 28, but the wiring lead-out part may be formed on the bottom plate 32 of the lower housing part 28.
  • the wiring lead-out portion (opening) 140 is formed in the vicinity of the connecting portion (corner portion) between the bottom plate 32 and the side plate 34 in the lower housing 28.
  • the part 44 is drawn to the outside via the wiring lead-out part 140.
  • the wiring protection part 142 formed integrally with a part of the reflection sheet 48 (a part of the bottom part 50 or the side part 52) is pulled out via the wiring lead-out part 140, and the circuit connection part 44 is connected to the lower housing 28.
  • the edge portion 144 is not directly contacted.
  • the flexible printed circuit board is protected by the circuit connecting portion derived from the housing being covered with the optical sheet and protected.
  • the connecting portion does not directly touch the edge of the housing and the plate constituting the housing. Therefore, the flexible printed circuit board is not damaged during manufacture or use of the light source device.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

L'invention concerne un dispositif de source de lumière (14). Une plaque de guidage de lumière (56), une source de lumière (42) et au moins une feuille optique (48) sont stockées dans un espace de stockage d'élément optique (38) formé par un logement (26), et la lumière entrant dans la plaque de guidage de lumière (56) depuis la source de lumière (42) est diffusée dans la plaque de guidage de lumière (56) et est ensuite émise de façon planaire depuis une surface d'émission de lumière (57) de la plaque de guidage de lumière (56). L'invention concerne également un dispositif d'affichage à cristaux liquides (10). Le dispositif de source de lumière ou analogue comprend une section de sortie de câblage (46) formée sur le logement (26) ; une carte de circuit imprimé souple (24) introduite vers l'extérieur à partir de l'espace de stockage d'élément optique (38) à travers la section de sortie de câblage (46) et comprenant un circuit électrique connecté à la source de lumière (42) ; et une section de protection de câblage (60), qui est intégralement formée avec la feuille optique (48) et est agencée entre le logement (26) et la carte de circuit imprimé souple (24) au niveau de la section de sortie de câblage (46). Ainsi, la section de connexion du circuit n'entre pas directement en contact avec le boîtier et les bords des cartes constituant le boîtier. Par conséquent, la carte de circuit imprimé souple ne se casse pas lors de la fabrication ou de l'utilisation du dispositif de source de lumière.
PCT/JP2008/072258 2007-12-28 2008-12-08 Dispositif de source de lumière et dispositif d'affichage à cristaux liquides WO2009084379A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020107002172A KR101121599B1 (ko) 2007-12-28 2008-12-08 광원 장치 및 액정 표시 장치
CN2008801030401A CN101779074B (zh) 2007-12-28 2008-12-08 光源装置及液晶显示装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-341110 2007-12-28
JP2007341110A JP5024038B2 (ja) 2007-12-28 2007-12-28 光源装置及び液晶表示装置

Publications (1)

Publication Number Publication Date
WO2009084379A1 true WO2009084379A1 (fr) 2009-07-09

Family

ID=40824100

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/072258 WO2009084379A1 (fr) 2007-12-28 2008-12-08 Dispositif de source de lumière et dispositif d'affichage à cristaux liquides

Country Status (4)

Country Link
JP (1) JP5024038B2 (fr)
KR (1) KR101121599B1 (fr)
CN (1) CN101779074B (fr)
WO (1) WO2009084379A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012014601A1 (fr) * 2010-07-29 2012-02-02 シャープ株式会社 Appareil d'éclairage, appareil d'affichage, et appareil récepteur de télévision

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5576504B2 (ja) * 2010-12-10 2014-08-20 京セラ株式会社 光源装置及び表示装置
CN103260349A (zh) * 2012-02-15 2013-08-21 深圳市科伦特科技有限公司 软硬电路板组合式led显示屏模组
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JP2009163952A (ja) 2009-07-23
KR101121599B1 (ko) 2012-02-28

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