WO2003014816A1 - Dispositif d'affichage a cristaux liquides - Google Patents

Dispositif d'affichage a cristaux liquides Download PDF

Info

Publication number
WO2003014816A1
WO2003014816A1 PCT/JP2002/007886 JP0207886W WO03014816A1 WO 2003014816 A1 WO2003014816 A1 WO 2003014816A1 JP 0207886 W JP0207886 W JP 0207886W WO 03014816 A1 WO03014816 A1 WO 03014816A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid crystal
crystal display
locking portion
display panel
display device
Prior art date
Application number
PCT/JP2002/007886
Other languages
English (en)
Japanese (ja)
Inventor
Hirofumi Ouchida
Original Assignee
Matsushita Electric Industrial Co.,Ltd
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 Matsushita Electric Industrial Co.,Ltd filed Critical Matsushita Electric Industrial Co.,Ltd
Publication of WO2003014816A1 publication Critical patent/WO2003014816A1/fr

Links

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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • 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
    • G02F2201/46—Fixing elements
    • 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

Definitions

  • the present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device that prevents local fluctuation of a liquid crystal display panel caused by vibration.
  • Liquid crystal display devices are becoming more and more used, taking advantage of their features of lightness, thinness, and low power consumption. Also, as a recent trend, there has been a demand for lighter and thinner LCD screens as well as large LCD screens for displaying images. Furthermore, in order to take advantage of the portability features of notebook personal computers, improved durability against shock and vibration is required.
  • FIG. 7 and FIG. 8 are diagrams showing the structure of a conventional liquid crystal liquid crystal display device.
  • Reference numeral 1 denotes an outer frame, which is constituted by a box covering the lighting unit BL and the liquid crystal display panel 2, and has a front opening 1 a corresponding to a display range of the liquid crystal display panel 2.
  • the lighting unit (also called a backlight) BL is equipped with a light source (fluorescent lamp), a light guide plate that guides the light from the light source, and a reflection sheet disposed on the back surface. Have been done.
  • the lighting unit BL and the outer peripheral frame L 1 are provided with a first locking portion and a second locking portion, respectively.
  • a claw 1 t for caulking is formed on the side surface portion 1 b of the outer peripheral frame 1 as a second locking portion. Further, the resin case 3 is formed with a concave locking portion 3 a as a first locking portion into which the crimping claw 1 t enters in the crimping step. Normally, the caulking claw 1 t provided on the outer peripheral frame 1 is formed so as to bend slightly inward. When attached to BL, The caulking claw 1t is locked by a caulking structure that elastically enters the concave locking portion 3a.
  • the outer frame 1 that holds the conventional liquid crystal display panel 2 and the lighting unit BL has a claw 1 t for caulking, and a concave portion 3 a of the resin case 3.
  • the crimping claw 1 t has elasticity like a leaf spring due to its shape, when the liquid crystal display device is vibrated, the outer peripheral frame 1 t Vibration is locally applied to the lighting unit BL through the corner portion 3b from the crimping claw 1t force, and as a result, the liquid crystal display panel 2 is shaken, causing display unevenness called so-called liquid crystal fluctuation. Had problems.
  • an object of the present invention is to provide a liquid crystal display device that prevents local fluctuation of a liquid crystal display panel caused by vibration. Disclosure of the invention
  • a liquid crystal display device comprising: a liquid crystal display panel having a pair of substrates for holding a liquid crystal; and a lighting unit having an outer periphery with a first locking portion for illuminating the liquid crystal display panel.
  • a part of the corner of the first or second locking portion has elasticity. It is characterized in that a chamfered part is formed so that the other holding part held by it does not contact.
  • the liquid crystal display device can be vibrated. Even so, the movement is prevented from being transmitted from the outer peripheral frame to the lighting unit through the first or second locking portion.
  • the liquid crystal display device has a pair of substrates for holding the liquid crystal.
  • a liquid crystal display panel a lighting unit having a first locking portion on the outer periphery to illuminate the liquid crystal display panel, a front opening formed on the display surface side of the liquid crystal display panel, and a second locking portion on the outer circumference.
  • a peripheral frame for holding the lighting unit together with the liquid crystal display panel.
  • One of the first locking portion and the second locking portion has elasticity, and one of them has elasticity on the other.
  • a buffer member is provided at a corner portion of the first or second locking portion.
  • the buffer member since the buffer member is provided at the corner of the first or second locking portion, the buffer member absorbs vibration even when the liquid crystal display device is vibrated. Alternatively, the transmission of the vibration from the outer peripheral frame to the lighting unit through the second locking portion is suppressed.
  • FIG. 1 is an exploded perspective view of the liquid crystal display device according to the first embodiment.
  • FIG. 2 is a cross-sectional view of the liquid crystal display device of the first embodiment.
  • FIG. 3 is a perspective view of a locking portion of the lighting unit according to the first embodiment.
  • ? 1 8 4 is a rear view of the locking portion of the illumination Yunitto in the first embodiment.
  • FIG. 5 is a rear view showing an example of the locking portion of the lighting unit according to the first embodiment.
  • FIG. 6 is a rear view of the locking unit of the lighting unit according to the second embodiment.
  • FIG. 7 is an exploded perspective view of a conventional liquid crystal display device.
  • F i g 8 is a rear view of the locking portion of the illumination Yuni' Bok that put in a conventional liquid crystal display device.
  • FIG. 9 is a back view showing another example of the locking portion.
  • FIG. 1 is an exploded perspective view of the liquid crystal display device of the present embodiment, and FIG. FIG.
  • the liquid crystal display device of the present embodiment includes a liquid crystal display panel 2, a lighting unit BL, and an outer peripheral frame 1 that holds them.
  • the liquid crystal display panel 2 sandwiches liquid crystal between a pair of substrates and is driven by an LSI or the like arranged around the substrates.
  • the outer frame 1 is a frame-shaped frame made of metal or resin, and has a front opening 1a opened along the display surface of the liquid crystal display panel 2 on the front side, and an outer periphery of the liquid crystal display panel 2 and the lighting unit BL. And a side portion 1b for holding the side, and the bottom portion is open.
  • the lighting unit BL includes a light source (fluorescent lamp) 7, a light guide plate 5 for guiding light from the light source 7, a resin film 4 disposed on the surface thereof, a reflection sheet 6 disposed on the back surface thereof, and the like. These are housed in the resin case 3.
  • the lighting unit BL and the outer peripheral frame 1 are provided with a first locking portion and a second locking portion, respectively.
  • the side surface 1b of the outer peripheral frame 1 is provided with two caulking claws 1t as right and left as second locking portions, and the caulking claw 1t serving as the second locking portion is slightly It is bent toward ⁇ .
  • a concave locking portion 3a is formed as a first locking portion.
  • the crimping claw 1 t of the outer peripheral frame 1 enters the concave locking portion 3 a and the tip is locked, but the corner part 3 b of the concave locking portion 3 a is , FIG. 3 and FIG. 4 are chamfered.
  • the angle 01 of the chamfered portion in the present embodiment is about 40 degrees, which is almost the same as the bending angle ⁇ 2 of the claw 1 t for caulking of the outer peripheral frame 1.
  • the caulking claw 1 t of the outer peripheral frame 1 should not contact the corner portion 3 b of the concave locking portion 3 a ( So that it does not come into contact with anything other than the upper surface of the nail). Note that the present invention is not limited to the above angle.
  • a corner portion 3 b of the concave engaging portion 3 a may also be rounded (R) are formed, or, in F ig 5 (b)
  • R rounded
  • a chamfered portion having a step may be used.
  • a concave chamfered portion may be used.
  • the caulking claw 1 t of the outer frame 1 does not contact the inner corner part 3 b of the concave locking portion 3 a (although it does not contact except at the tip end), At this angle (approximately 40 degrees), the claw 1t for caulking of the outer frame 1 bent at the same angle can be easily manufactured, and the outer frame 1 is attached to the corner 3b of the concave locking portion 3a.
  • the configuration is such that the crimping claw 1 t is difficult to contact.
  • the crimping claw 1 t becomes concave. It has a caulking structure that elastically enters the locking portion 3a. At this time, since the corner portion 3b of the concave locking portion 3a has a chamfer, a round (R) or a step, the claw 1t for crimping of the outer peripheral frame 1 is bent. Even if the liquid crystal display device is vibrated without contacting the bent parts, the conventional local vibration is prevented from being transmitted from the outer peripheral frame 1 to the lighting unit B through the caulking claw 1 t. The Rukoto. As a result, the liquid crystal display panel 2 is not shaken, and the occurrence of display unevenness called liquid crystal fluctuation is prevented.
  • FIG. 6 is a rear view of the caulked portion of the present embodiment.
  • Lighting Interview of this embodiment - in Tsu in preparative BL of the first concave engagement portion 3 a is a locking portion corner portion 3, the buffer member 9 is provided.
  • a resin material such as thin rubber or tape is suitable.
  • the concave engaging portion 3a of the conventional lighting unit BL is provided at the corner 3b of the concave engaging portion 3a, but the concave engaging portion 3a in the first embodiment is provided. It may be provided at the corner of 3a, 3b, chamfer, radius (R), or step.
  • the cushioning member 9 is provided on the corner portion 3b of the concave locking portion 3a of the lighting unit BL, so that even if the liquid crystal display device is vibrated, Since the member 9 absorbs the vibration, it is possible to suppress the conventional transmission of the local vibration from the outer peripheral frame 1 to the lighting unit BL through the caulking claw 1 t serving as the second locking portion. Becomes That is, the vibration of the outer peripheral frame 1 is absorbed by the cushioning member 9, and it is possible to prevent the liquid crystal display panel from swaying due to vibration due to transportation, dropping, and the like.
  • the force in which a concave locking portion 3a as a first locking portion and one or two crimping claws as a second locking portion are provided. Is not limited to this, and may be provided at three or more locations.
  • a caulking claw 1 t is provided on the side surface portion 1 b of the outer peripheral frame 1 as a second locking portion, and a concave locking portion is formed as the first locking portion.
  • the locking portion 3a is provided on the outer periphery of the resin case 3 has been described, the present invention is not limited to these shapes. For example, as shown in FIG.
  • a convex locking portion 3c is provided on the outer periphery of the resin case 3 as a first locking portion, and is bent outward as a second locking portion.
  • the claw-shaped locking portion 1X provided may be provided on the side surface portion 1b of the outer peripheral frame 1 so that the convex locking portion 3c enters the claw-shaped locking portion 1X having elasticity.
  • the corners 3 d of the convex locking portions 3 c provided on the resin case 3 are chamfered, rounded (R) or stepped, and the buffer member 9 is appropriately provided.
  • the convex locking portion 3 e formed so as to be slightly bent connexion suited to perimeter frame 1 as a shape of the nail 1 t for the caulking
  • a round (R) or the like may be provided at a corner 1 z of the concave locking portion 1 y provided on the outer peripheral frame 1.
  • a part of the corner of the first or second locking portion is formed with a chamfered portion so that the other retaining portion having elasticity does not contact. Therefore, even if the liquid crystal display device is vibrated, This prevents the vibration from being transmitted locally. Therefore, it is possible to prevent local fluctuation of the liquid crystal display panel caused by twisting, and to prevent display unevenness called so-called liquid crystal fluctuation.
  • the buffer member is provided at a part of the corner of the first or second locking portion, even if the liquid crystal display device is vibrated.
  • the cushioning member absorbs the vibration, which suppresses the local transmission of the vibration from the outer peripheral frame to the lighting unit, prevents local vibration of the liquid crystal display panel caused by the vibration, and causes display unevenness called so-called liquid crystal fluctuation. Can be prevented.

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

L'oscillation locale d'un panneau d'affichage à cristaux liquides produite par excitation est empêchée. Une partie de coin (3b) d'une partie de blocage évidée (3a) formant une première partie de blocage ménagée sur un coffret en résine (3) est chanfreinée, et une patte de fermeture (1t) formant une seconde partie de blocage est maintenue hors de contact d'avec le coffret en résine (3). Ainsi on peut empêcher la transmission d'oscillations vers une unité d'illumination (BL) et un panneau à cristaux liquides (2) depuis un cadre extérieur périphérique (1) par la patte de fermeture (1t).
PCT/JP2002/007886 2001-08-02 2002-08-02 Dispositif d'affichage a cristaux liquides WO2003014816A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001-234337 2001-08-02
JP2001234337 2001-08-02

Publications (1)

Publication Number Publication Date
WO2003014816A1 true WO2003014816A1 (fr) 2003-02-20

Family

ID=19065961

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2002/007886 WO2003014816A1 (fr) 2001-08-02 2002-08-02 Dispositif d'affichage a cristaux liquides

Country Status (1)

Country Link
WO (1) WO2003014816A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1510853A1 (fr) 2003-08-27 2005-03-02 NEC Corporation Module d'affichage à cristaux liquides, dispositif de communication mobile, et méthode de montage d'un module d'affichage à cristaux liquides

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0580334A (ja) * 1991-09-20 1993-04-02 Rohm Co Ltd 液晶表示装置のバツクライト保持構造
JPH09114393A (ja) * 1995-10-24 1997-05-02 Fujitsu Ltd 表示ユニット

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0580334A (ja) * 1991-09-20 1993-04-02 Rohm Co Ltd 液晶表示装置のバツクライト保持構造
JPH09114393A (ja) * 1995-10-24 1997-05-02 Fujitsu Ltd 表示ユニット

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1510853A1 (fr) 2003-08-27 2005-03-02 NEC Corporation Module d'affichage à cristaux liquides, dispositif de communication mobile, et méthode de montage d'un module d'affichage à cristaux liquides
JP2005070569A (ja) * 2003-08-27 2005-03-17 Nec Corp 移動体通信機及びそれに用いるｌｃｄモジュール実装方法
CN1298191C (zh) * 2003-08-27 2007-01-31 日本电气株式会社 液晶显示器模块、移动通信装置及安装液晶显示器模块的方法
US7403242B2 (en) 2003-08-27 2008-07-22 Nec Corporation Liquid crystal display module, mobile communication device, and method of mounting liquid crystal display module

Similar Documents

Publication Publication Date Title
US7377682B2 (en) Backlight module and liquid crystal display device using the same
TWI399589B (zh) 背光組件及具有該背光組件之顯示裝置
EP1440717B1 (fr) Machine de jeu
JP5582677B2 (ja) 液晶表示装置
US7724317B2 (en) Liquid crystal display device with a main support frame having slide groove portions therein and a first upper cover having slide protrusions therein inserted into the slide groove portions, and method of fabricating thereof
JP4121952B2 (ja) 平面ユニット構造体
US20100128197A1 (en) Liquid crystal display module
US20060126362A1 (en) Backlight module with urged light guide plate and liquid crystal display having same
US7413338B2 (en) Backlight module with noise damping protrusion and liquid crystal display with same
JP2001249324A (ja) 液晶表示装置
US7004614B2 (en) Backlight module
EP1903382A1 (fr) Affichage à cristaux liquides
US7808574B2 (en) Liquid crystal display device having integral receiving box and assembly method for same
US20060262570A1 (en) Backlight assembly and display device having the same
JP3792498B2 (ja) 面光源装置及び画像表示装置
US20080062352A1 (en) Light guide plate having light emitting unit receptacles and backlight module and liquid crystal display using the same
JP2003162232A (ja) 液晶表示装置
JP6025423B2 (ja) 表示装置
WO2003014816A1 (fr) Dispositif d'affichage a cristaux liquides
JP2004109734A (ja) 液晶表示装置
KR100493616B1 (ko) 액정표시장치
JP2008047144A (ja) 平面ユニット構造体
JP2002184230A (ja) 平面表示装置
JP2006004751A (ja) 光学シート、バックライトユニット及びフラットパネル型表示装置
JP4534552B2 (ja) 液晶表示装置

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BY BZ CA CH CN CO CR CU CZ DE DM DZ EC EE ES FI GB GD GE GH HR HU ID IL IN IS JP KE KG KP KR LC LK LR LS LT LU LV MA MD MG MN MW MX MZ NO NZ OM PH PL PT RU SD SE SG SI SK SL TJ TM TN TR TZ UA UG US UZ VN YU ZA ZM

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG US UZ VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ UG ZM ZW AM AZ BY KG KZ RU TJ TM AT BE BG CH CY CZ DK EE ES FI FR GB GR IE IT LU MC PT SE SK TR BF BJ CF CG CI GA GN GQ GW ML MR NE SN TD TG

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LU MC NL PT SE SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP