WO2005096081A1 - Ensemble retro-eclairage a conception d'amortisseur - Google Patents

Ensemble retro-eclairage a conception d'amortisseur Download PDF

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Publication number
WO2005096081A1
WO2005096081A1 PCT/CN2004/000293 CN2004000293W WO2005096081A1 WO 2005096081 A1 WO2005096081 A1 WO 2005096081A1 CN 2004000293 W CN2004000293 W CN 2004000293W WO 2005096081 A1 WO2005096081 A1 WO 2005096081A1
Authority
WO
WIPO (PCT)
Prior art keywords
backlight module
light guide
guide plate
module according
opening
Prior art date
Application number
PCT/CN2004/000293
Other languages
English (en)
Chinese (zh)
Inventor
Dengkun Xiao
Original Assignee
Quanta Display Inc.
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 Quanta Display Inc. filed Critical Quanta Display Inc.
Priority to PCT/CN2004/000293 priority Critical patent/WO2005096081A1/fr
Publication of WO2005096081A1 publication Critical patent/WO2005096081A1/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
    • G02F1/1335—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
    • 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
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • 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
    • 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 backlight module for a liquid crystal display, and in particular, a buffer structure is designed on a frame of the module, which can absorb shock energy to protect a lamp tube or a light guide plate of the backlight module Important parts. Background technique
  • FIG. 1 is a top view of some components of a conventional LCD backlight module
  • FIG. 2 is a magnified A-A cross-sectional view of FIG. 1.
  • a liquid crystal display requires an additional backlight module to provide a light source.
  • the main method is to use the light guide plate 11 to convert the light generated by the light tube 12 into a uniform surface light source, and each element is fixed by a frame 10.
  • a shock test is one of the important test items. After the impact test, the structure of the backlight module must not have serious structural deformation, or there must be no damage to components such as the light guide plate 11 or the lamp tube 12, especially no damage to the lamp tube 12.
  • the internal tube containing mercury vapor because of damage if compromised, would cause substantial pollution of the environment and the user, so the environmental protection intended ii 3, and customer safety first Under the requirements, the conditions of the impact test are getting more and more severe.
  • the light guide plate 11 may hit the lamp tube 12 due to inertia or transmission of vibration energy. Therefore, the light guide plate 11 must be properly fixed.
  • the frame 10 Under the trend of short and thin information products, there are not many structures that the frame 10 can be used for fixing the light guide plate. In addition, more and more driving ICs are being used. In the case, the frame 10 must reserve space for arranging its cables, so the space for the frame 10 with other designs can be reduced even more.
  • the light guide plate 11 must provide a uniform surface light source, and its light guide effect and optical transmission path have undergone precise simulation and experiments. Therefore, any irregular protruding or concave structure will cause uneven local light guide effects.
  • the light incident side of the light guide plate 11 is likely to collide with the lamp tube, but the light incident side is also the light receiving side of the lamp tube 10. Considering the consideration of display brightness, it is not possible to design any blocking structure between the light incident side and the lamp tube to prevent the light guide plate 11 m from hitting the lamp tube 12.
  • Japanese Patent Laid-Open No. JP2003-66420 discloses a light guide plate fixing design related to the above problems, please refer to FIG. 3.
  • the lamp tube mounting groove 22 is used to house a lamp tube (not shown), wherein a recess 24 is provided in the frame 21, and the light guide plate has a protrusion (not shown) corresponding to the recess 24, so that the light guide plate can be fixed.
  • a slit 23 is provided adjacent to the notch 24 to form a buffer structure 25.
  • this design has the following problems in practice:
  • the space occupied by the implementation of the buffer structure is large:
  • the patent forms a buffer structure similar to a cantilever beam in the form of a slit, which occupies a large space; however, in the trend of short and thin information products, and high resolution needs more For the driving chip, the frame must reserve space for its wiring, so it is difficult to apply this design.
  • the root is easy to break: The design of the cantilever root 26 is too weak, so when the impact is severe!
  • the cantilever root 26 is easy to break and the design fails.
  • the mold must be constantly modified during this process, however the design disclosed in the patent Molds are not easy to modify and are time consuming to verify.
  • the mold structure is more complicated: Whether it is the verification stage before the mold opening or the mass production design change after the mold opening, the structure is complex and the time required is longer, which affects the development process.
  • Taiwan Patent Bulletin No. 525791 discloses another related design for fixing the light guide plate of the backlight module.
  • the frame 31 has an opening 34
  • the light guide plate 32 has a lug 33
  • the lug 33 is engaged with the recess 34 to fix the light guide plate 32.
  • the lug turning point 35 is usually designed with rounded corners to avoid stress concentration.
  • the reference amount of the space available for the frame 31 (the width W of the lug 33) is usually very small (less than about 5 mm), if the rounded corners are redesigned, the linear engaging portion 36 will be small.
  • An object of the present invention is to provide a flat display backlight module with an impact resistance test. Another object of the present invention is to provide a flat display backlight module which is easy to verify the design effect and has an impact test.
  • the present invention provides a backlight module including a light guide plate, and a peripheral edge of a side edge of at least one side of the light guide plate includes at least one lug; and a frame, at least one side of the frame
  • the inner edge of the side includes at least one recessed notch, and the recessed notch and the lug of the light guide plate are engaged with each other to fix the guide plate, wherein the recessed notch is provided with at least one opening at an adjacent frame structure.
  • the opening and its adjacent structure form a buffer structure portion.
  • ⁇ absorbs the energy transmitted from the ear of the light guide plate through the buffer structure portion, avoiding: Damage caused by complete absorption by the ears.
  • the present invention also provides a backlight module, which includes a light guide plate, and a peripheral edge of at least one side of the light guide plate includes at least one recessed notch; and a frame, wherein an inner edge of the side edge of at least one side of the frame includes at least one A protrusion, which is engaged with the recessed notch of the light guide plate to fix the light guide plate, wherein the protrusion is provided with at least one opening at an adjacent frame structure, and the opening and the adjacent structure form a buffer structure portion . Therefore, compared with the prior art, the design of the present invention can be summarized as having the following advantages ⁇
  • the space occupied by the buffer structure is small. Not only is it easy to implement, it also leaves enough room for other components.
  • the buffer structure is stable. It can effectively absorb the energy of shock and vibration, and it is not easy to cause structural failure such as root fracture, which will cause the design to fail, that is, it can pass the impact test of more severe conditions.
  • the frame buffer structure has the function of absorbing impact energy, the curvature of the fillet at the turning point of the light guide plate can be reduced, or even at a right angle, so the contact area of the straight line engagement is greatly increased to avoid the light guide plate from detaching and colliding. Lamp tube, causing module lamp failure.
  • FIG. 1 is a schematic diagram of some structural elements of a backlight module in the prior art.
  • FIG. 2 is a schematic cross-sectional view of some structural elements of a backlight module in the prior art.
  • Fig. 3 is a drawing in a patent document in the prior art.
  • FIG. 4 is a drawing in another patent document in the prior art.
  • FIG. 5 is a schematic diagram of some structural elements of the backlight module of the present invention.
  • FIG. 6 is an enlarged view of a backlight module structure of the present invention.
  • FIG. 7 is a modified example of the embodiment of the present invention.
  • Fig. 8 is a modified example of the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION The above and other objects of the present invention will become more apparent through the following preferred embodiments and detailed description in conjunction with the accompanying drawings.
  • the backlight module has a frame 100, which can accommodate the light guide plate 200 and a lamp tube 300; the light guide plate 200 has a lug 210 at a suitable position on the left and right peripheral edges 220, Frame 100 corresponds to light guide
  • the lug 210 of the plate 200 has a recessed notch 110, and the light guide plate 200 can be fixed in the frame 100 by engaging the recessed notch 110 with the lug 210.
  • An opening 120 is provided on the frame 100 near the lower edge of the lug 210 and faces the lamp tube 300, and its function is: the opening 120 can weaken the structural strength of the adjacent frame 100, and can be adjacent to the opening 120.
  • the area forms an impact buffer 130.
  • the lug 210 of the light guide plate 200 hits the recessed gap 110 of the frame 100, the energy of the shock or vibration can be effectively impact Absorbed by the buffer portion 130 makes it difficult for the lugs 210 of the light guide plate 200 to break, especially the connection turning point 230 where the lugs 210 and the peripheral edge 220 are connected.
  • it is easy to break here due to stress concentration. In order to reduce the effect of stress concentration, it is generally rounded here. The larger the curvature of the fillet, the better the effect of reducing the stress concentration.
  • this approach has its limitations and can cause another serious problem.
  • the lug 210 can be used to engage with the notch engagement linear segment 140 of the frame 100.
  • the lug engagement linear segment 240 will become smaller and smaller, coupled with the problem of manufacturing tolerances. It is easy to cause the light guide plate 200 to escape the restriction of the frame 100 and hit the lamp tube.
  • the design of the impact buffer portion 130 reduces the curvature of the rounded corners of the connection turning point 230, and can even be designed to be a right angle, not only can the design reliability be further improved, but the manufacturing tolerance range does not need to be set too harshly. As a result, mold processing costs increase.
  • the upper half connecting edge 250 of the lug 210 connected to the upper half periphery 220 can also be designed as a beveled edge, which is considered in the case where only one lamp is configured, that is, if When no light tube is arranged above the light guide plate 200, because there is no concern that the light guide plate hits the upper tube, a simple beveled edge design can appropriately disperse the impact force and reduce the stress concentration phenomenon.
  • the shape of the opening 120 is not It is limited to the rectangle shown in FIG. 5, and may also be a circle or other polygons.
  • the depth of the opening 120 may be a through hole or a blind hole.
  • the openings 120 are not limited to being disposed on the lower edge of the lug 210, but may also be disposed on the upper edge thereof, or may be provided as a pair, and located on the lower and upper edges of the lug 210, as shown in the opening in FIG. 121 and 122; and the frame 101 is engaged with the lug 211 to fix the light guide plate.
  • the light guide plate 400 of the backlight module has a recessed notch 410 at appropriate peripheral edges of left and right sides, and an inner edge of the frame 500 is provided with a protrusion 510 corresponding to the recessed notch 410.
  • the engagement of 510 and the recessed notch 410 allows the frame 500 to fix the light guide plate 400; the frame 500 is provided with an opening 530 near the protruding portion 510 to weaken the adjacent structure and form an impact buffer portion 520.
  • the shock buffering portion 520 also has the function of absorbing shock vibration energy to protect the lamp tube and the light guide plate 400.

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

Abstract

L'invention concerne un ensemble rétro-éclairage pour afficheurs à cristaux liquides, plus précisément un ensemble rétro-éclairage présentant une structure d'amortisseur entourant son cadre aux fins d'absorber l'énergie de vibrations et de chocs et de protéger les éléments importants dudit ensemble rétro-éclairage, par exemple le tube d'éclairage ou le panneau de guidage de lumière (200) et analogue. L'ensemble rétro-éclairage comprend un panneau de guidage (200) de lumière, dont au moins un côté présente une périphérie comprenant au moins une saillie (210); et un cadre (100), dont au moins un côté présente une périphérie comprenant au moins une rainure (110), ladite rainure et la saillie étant en prise l'une avec l'autre pour fixer ledit panneau de guidage (200). Au moins une ouverture (120) est prévue sur le cadre (100) jouxtant la rainure (110), ladite ouverture et la structure adjacente formant une structure d'amortisseur.
PCT/CN2004/000293 2004-03-31 2004-03-31 Ensemble retro-eclairage a conception d'amortisseur WO2005096081A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2004/000293 WO2005096081A1 (fr) 2004-03-31 2004-03-31 Ensemble retro-eclairage a conception d'amortisseur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2004/000293 WO2005096081A1 (fr) 2004-03-31 2004-03-31 Ensemble retro-eclairage a conception d'amortisseur

Publications (1)

Publication Number Publication Date
WO2005096081A1 true WO2005096081A1 (fr) 2005-10-13

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1022665A (ja) * 1996-07-02 1998-01-23 Oki Electric Ind Co Ltd Ｌｃｄ表示器のｌｃｄモジュール構造
US6046785A (en) * 1997-08-30 2000-04-04 Lg Electronics Inc. Attachment structure of light guide to frame for liquid crystal display device
CN1349126A (zh) * 2000-10-13 2002-05-15 三星电子株式会社 用于液晶显示装置的背光组件
WO2003014617A1 (fr) * 2001-08-02 2003-02-20 Matsushita Electric Industrial Co.,Ltd Dispositif d'eclairage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1022665A (ja) * 1996-07-02 1998-01-23 Oki Electric Ind Co Ltd Ｌｃｄ表示器のｌｃｄモジュール構造
US6046785A (en) * 1997-08-30 2000-04-04 Lg Electronics Inc. Attachment structure of light guide to frame for liquid crystal display device
CN1349126A (zh) * 2000-10-13 2002-05-15 三星电子株式会社 用于液晶显示装置的背光组件
WO2003014617A1 (fr) * 2001-08-02 2003-02-20 Matsushita Electric Industrial Co.,Ltd Dispositif d'eclairage

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