CN100365481C - Back light module - Google Patents
Back light module Download PDFInfo
- Publication number
- CN100365481C CN100365481C CNB02150332XA CN02150332A CN100365481C CN 100365481 C CN100365481 C CN 100365481C CN B02150332X A CNB02150332X A CN B02150332XA CN 02150332 A CN02150332 A CN 02150332A CN 100365481 C CN100365481 C CN 100365481C
- Authority
- CN
- China
- Prior art keywords
- fluorescent tube
- guide plate
- light guide
- circular arc
- backlight module
- 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.)
- Expired - Lifetime
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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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
The present invention provides a back light module in a liquid crystal display device. The structural design of an illuminating lamp group in a back light module and the arrangement mode of illuminating lamp tubes are improved, the thickness and the weight of the back light module are effectively reduced consideration to the brightness (illuminating brightness) of the liquid crystal display device, and the liquid crystal display device is thin and light.
Description
Technical field
The present invention relates to a kind of backlight module, the particularly a kind of thickness of liquid crystal indicator and backlight module that weight more reduces of making.
Background technology
See also Fig. 1, the backlight module 1 in the liquid crystal indicator in the past is made of a face glass 2, a light guide plate 4 and disymmetrical side formula lighting lamp group 6.Above face glass 2, also be provided with assemblies such as diffusion sheet and brightening piece, and below light guide plate 4, also be provided with assembly such as reflector plate, in this figure, then omit and show.Lighting lamp group 6 includes two illuminating lamp tube 6a, 6b arranged side by side up and down and a reflex housing 6c, the light that two illuminating lamp tube 6a, 6b are sent is except that can directly injecting the light guide plate 4, also can reflex in the light guide plate 4, and can absorb and scattering through a plurality of optics site (not shown) that is positioned at light guide plate 4 bottoms through reflex housing 6c.
General two illuminating lamp tube 6a, the 6b diameter that is adopted is 2.4mm.Simultaneously, necessary certain at interval distance between two illuminating lamp tube 6a, the 6b, to avoid light or luminous energy to be absorbed mutually by two illuminating lamp tube 6a, 6b, and the brightness of illumination of injecting in the light guide plate 4 is had a greatly reduced quality, and two illuminating lamp tube 6a, 6b also must keep certain distance with reflex housing 6c, to guarantee the reflecting effect of light.Therefore, in backlight module 1 in the past, the thickness t 1 of light guide plate 4 is generally 8mm.
In order to reduce the thickness of light guide plate, see also Fig. 2, other has a kind of backlight module 10 in the past can solve the excessive problem of light guide plate.At this, identical assembly all indicates with identical symbol.Backlight module 10 has a face glass 2, light guide plate 4 and disymmetrical side formula lighting lamp group 6 ' equally.Lighting lamp group 6 ' then includes illuminating lamp tube 6a, the 6b that two inclineds are arranged.Diameter at two illuminating lamp tube 6a, 6b still is under the situation of 2.4mm, just under the condition that the optical characteristics of two illuminating lamp tube 6a, 6b remains unchanged, and the brightness of illumination of injecting in the light guide plate 4 is remained unchanged down, have at this kind among the lighting lamp group 6 ' of two inclineds arrangement illuminating lamp tube 6a, 6b, the thickness of its reflex housing 6 ' c can reduce, and also can make the thickness t 2 of the light guide plate 4 of backlight module 10 reduce to become 6mm.
Yet,, except should reaching liquid crystal indicator required optical brightness and mechanism characteristics, more need further be improved the design on thickness and weight for slimming and light-weighted demand in response to present liquid crystal indicator.But at aforesaid two kinds in the past in the backlight module of liquid crystal indicator, though can reach enough brightness of illuminations, and can't effectively overcome the excessive problem of its thickness.
Summary of the invention
In view of this, the objective of the invention is to provide a kind of backlight module, structural design by the lighting lamp group of improvement in the backlight module with and the set-up mode of illuminating lamp tube, and taking into account under the briliancy of liquid crystal indicator (brightness of illumination) situation, really reduce the thickness and the weight of backlight module effectively, and then make liquid crystal indicator slimming and lightweight effectively.
The present invention adopts as detailed below feature with in order to solve the above problems basically.That is to say that the present invention is applicable in the liquid crystal indicator, and comprises face glass; Light guide plate is the below that is arranged at this face glass, and has the binding side; And lighting lamp group, it is this binding side that is arranged at this light guide plate, and has reflex housing, first fluorescent tube and second fluorescent tube, this first fluorescent tube and this second fluorescent tube are coated by this reflex housing, wherein, this first fluorescent tube to the vertical range of this binding side of this light guide plate is greater than the vertical range of this second fluorescent tube to this binding side of this light guide plate, and this reflex housing is linked together by multiple camber and forms, be to reflex in this light guide plate in order to light with this first fluorescent tube and this second fluorescent tube, this reflex housing is in regular turn by oval calotte, first circular arc camber, second circular arc camber, three-arc curved surface and plane link and form, this first fluorescent tube is positioned at this first circular arc camber, and this second fluorescent tube is positioned at this three-arc curved surface.Therefore, this light guide plate and this lighting lamp group have the thickness of slimming.
Again, in the present invention, this oval calotte and this plane are this binding sides that is connected in this light guide plate.
Again, in the present invention, this first circular arc camber, this second circular arc camber and this three-arc curved surface are made up of a plurality of little circular arc camber especially.
Again, in the present invention, the bottom of this light guide plate has more a plurality of optics site, is in order to absorb and scattering enters light in this light guide plate.
Again, in the present invention, this reflex housing is made by stainless steel material.
Again, in the present invention, also comprising blooming piece, is the below that is arranged at this light guide plate.
Again, in the present invention, also comprising diffusion sheet, is the top that is arranged at this face glass.
Again, in the present invention, also comprising brightening piece, is the top that is arranged at this diffusion sheet.
Again, in the present invention, this light guide plate is made by propylene material.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly also cooperates appended graphic elaborating.
The accompanying drawing simple declaration
Fig. 1 is the schematic perspective view that shows backlight module in the past.
Fig. 2 is the front-view schematic diagram that shows another backlight module in the past.
Fig. 3 is the front-view schematic diagram that shows backlight module of the present invention.
Fig. 4 is the front-view schematic diagram that shows according to the lighting lamp group of Fig. 3.
Fig. 5 is presented in the lighting lamp group of the present invention, the relative position relation model of each inter-module.
Symbol description
1～in the past backlight module; 2～face glass; 4～light guide plate;
6～in the past lighting lamp group; 6 '～in the past lighting lamp group; 6a, 6b～illuminating lamp tube;
6a ', 6b '～illuminating lamp tube; 6c～reflex housing; 6c '～reflex housing;
10～in the past backlight module; 100～backlight module of the present invention;
110～face glass; 120～light guide plate; 122～binding side;
130～lighting lamp group of the present invention; 132～reflex housing; 134～the first fluorescent tubes;
136～the second fluorescent tubes; 1301～oval calotte; 1302～the first circular arc cambers;
1303～the second circular arc cambers; 1304～the three-arc curved surfaces; 1305～plane;
T1, t2, t3～light guide plate.
Concrete embodiment
In conjunction with graphic explanation preferred embodiment of the present invention.
Through experiment and test, backlight module in the liquid crystal indicator of the present invention has the structure as shown in Fig. 3 and Fig. 4, so could be under the briliancy that does not influence backlight module (brightness of illumination) condition, make the thickness of backlight module and weight reduce, and then reach and make liquid crystal indicator slimming and light-weighted purpose.
See also Fig. 3, backlight module 100 of the present invention mainly comprises a face glass 110, light guide plate 120 and two lighting lamp group 130.Light guide plate 120 is the belows that are arranged at face glass 110, and has two binding sides 122, and wherein, this two bindings side 122 is to be positioned on the relative side of light guide plate 120.Two lighting lamp group 130 are to be arranged at this two bindings side 122 respectively.
The principal character of backlight module 100 of the present invention be improvement lighting lamp group 130 structural design with and the set-up mode of illuminating lamp tube so that the thickness of light guide plate 120 reduces thereupon.
Please cooperate and consult Fig. 4, lighting lamp group 130 has reflex housing 132, first fluorescent tube 134 and second fluorescent tube 136, and wherein, first fluorescent tube 134 and second fluorescent tube 136 are the illuminating lamp tubes for diameter 2.4mm.First fluorescent tube 134 and second fluorescent tube 136 are 132 coatings of cover that are reflected.First fluorescent tube 134 to the vertical range of the binding side 122 of light guide plate 120 is greater than the vertical range of second fluorescent tube 136 to the binding side 122 of light guide plate 120.Reflex housing 132 is linked together by multiple camber and forms, and is to reflex in the light guide plate 120 in order to the light that first fluorescent tube 134 and second fluorescent tube 136 are sent.
Still see also Fig. 4, in the present embodiment, reflex housing 132 is to be linked and formed by oval calotte 1301, first circular arc camber 1302, second circular arc camber 1303, three-arc curved surface 1304 and plane 1305 in regular turn, wherein, oval calotte 1301 and plane 1305 are the binding sides 122 that are connected in light guide plate 120.As shown in Figure 4, first fluorescent tube 134 is positioned at first circular arc camber 1302, and second fluorescent tube 136 is positioned at three-arc curved surface 1304.
In the present embodiment, first circular arc camber 1302, second circular arc camber 1303 and three-arc curved surface 1304 that it should be noted that reflex housing 132 are made up of a plurality of little circular arc camber (not shown)s especially, to promote light reflecting effect more from first fluorescent tube 134 and second fluorescent tube 136, simultaneously, adopting the purpose of oval calotte 1301 also is in order to strengthen the light reflecting effect.Reflex housing 132 of the present invention is made by stainless steel material (SUS304), therefore can the processed easily or as above institute's structure detailed that is shaped.Therefore, adopt the structure of the reflex housing 132 that is as above described in detail, brightness of illumination in the light guide plate 120 can not reduced, and the relative position relation and the set-up mode of arrange in pairs or groups first fluorescent tube 134 and second fluorescent tube 136 can make the thickness of lighting lamp group 130 and the thickness t 3 of light guide plate 120 reduce again.
See also Fig. 5, C
1, C
2The home position of representing first fluorescent tube 134 and second fluorescent tube 136 respectively, Ψ
1, Ψ
2The diameter of representing first fluorescent tube 134 and second fluorescent tube 136 respectively, and Ψ
1=Ψ
2=2.4mm, then following for passing through experimental measurement and calculating in backlight module 100 relative position relation of each inter-module:
C＝2.86～2.88mm；
b＝1.0～1.2mm；
A
1＝2.71～2.75mm；
A
2＝0.91～0.95mm；
A
3＝1.0～1.5mm；
As for t3 then is 4mm, little more than in the past t1 (8mm), t2 (6mm), and through experimental measurement, the brightness of illumination in the light guide plate 120 can't reduce, therefore adopt lighting lamp group 130 of the present invention can make light guide plate 120 slimmings really as can be known, and then make the liquid crystal indicator slimming effectively.
Design of the present invention is for making the backlight module slimming, and reach purpose of thinness, and under the situation of the optics briliancy that does not influence backlight module, remove side by side the shortcoming up and down of two fluorescent tubes in the lighting lamp group in the past, and change the mode that two fluorescent tube inclineds are arranged of adopting, must accurately try to achieve simultaneously the relative position relation and the size distance of each inter-module, can obtain slimming and have the liquid crystal indicator product of high briliancy concurrently.
Though the present invention is disclosed in preferred embodiment; but it is not in order to limit the present invention; any skilled person; in not breaking away from design of the present invention and scope; should do a little change and retouching, so protection scope of the present invention is when looking being as the criterion that the accompanying Claim scope defined.
Claims (6)
1. backlight module is applicable to comprise in the liquid crystal indicator:
One face glass;
One light guide plate is the below that is arranged at this face glass, and has a binding side; And
One lighting lamp group, it is this binding side that is arranged at this light guide plate, and has a reflex housing, one first fluorescent tube and one second fluorescent tube, this first fluorescent tube and this second fluorescent tube are coated by this reflex housing, wherein, this first fluorescent tube to the vertical range of this binding side of this light guide plate is greater than the vertical range of this second fluorescent tube to this binding side of this light guide plate, and this reflex housing is linked together by multiple camber and forms, be to reflex in this light guide plate in order to light with this first fluorescent tube and this second fluorescent tube, and, this reflex housing is in regular turn by an oval calotte, one first circular arc camber, one second circular arc camber, an one three-arc curved surface and a plane link and form
This first fluorescent tube is to be positioned at this first circular arc camber, and this second fluorescent tube is to be positioned at this three-arc curved surface.
2. backlight module as claimed in claim 1, wherein, this oval calotte and this plane are this binding sides that is connected in this light guide plate, and this first circular arc camber, this second circular arc camber and this three-arc curved surface are made up of a plurality of little circular arc camber especially.
3. backlight module as claimed in claim 1, wherein, this reflex housing is made by a stainless steel material.
4. backlight module as claimed in claim 1 also comprises: be arranged at the below blooming piece of this light guide plate, the brightening piece that is arranged at the diffusion sheet of this face glass top and is arranged at this diffusion sheet top.
5. backlight module as claimed in claim 1, wherein, this light guide plate is made by propylene material.
6. a backlight module is applicable to comprise in the liquid crystal indicator: a face glass;
One light guide plate is arranged at the below of this face glass, and has a binding side; And
At least one lighting lamp group is arranged at this binding side of this light guide plate, and this lighting lamp group includes an at least one fluorescent tube and a reflex housing, and this reflex housing is coated on this fluorescent tube outside; Wherein, this reflex housing is to be linked by multiple camber, so that the light of this fluorescent tube reflexes in this light guide plate, and, this reflex housing is to be linked and formed by an oval calotte, one first circular arc camber, one second circular arc camber, a three-arc curved surface and a plane in regular turn, this oval calotte and this plane are this binding sides that is connected in this light guide plate
This lighting lamp group also comprises: have and be located at one first fluorescent tube in this first circular arc camber and be located at one second interior fluorescent tube of this three-arc curved surface.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB02150332XA CN100365481C (en) | 2002-11-01 | 2002-11-01 | Back light module |
| PCT/CN2003/000009 WO2004040362A1 (en) | 2002-11-01 | 2003-01-08 | A backlight modular |
| AU2003301699A AU2003301699A1 (en) | 2002-11-01 | 2003-01-08 | A backlight modular |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB02150332XA CN100365481C (en) | 2002-11-01 | 2002-11-01 | Back light module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1493902A CN1493902A (en) | 2004-05-05 |
| CN100365481C true CN100365481C (en) | 2008-01-30 |
Family
ID=32182027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB02150332XA Expired - Lifetime CN100365481C (en) | 2002-11-01 | 2002-11-01 | Back light module |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN100365481C (en) |
| AU (1) | AU2003301699A1 (en) |
| WO (1) | WO2004040362A1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0990135A (en) * | 1995-09-26 | 1997-04-04 | Buraito Kenkyusho:Kk | Backlight for liquid crystal display |
| EP0854318A1 (en) * | 1997-01-15 | 1998-07-22 | Siemens Aktiengesellschaft | Flat panel display |
| CN1285525A (en) * | 1999-08-20 | 2001-02-28 | 国际商业机器公司 | Liquid cyrstal display, background light unit, and fluorescent tube for background light unit |
| WO2001044715A1 (en) * | 1999-12-17 | 2001-06-21 | Koninklijke Philips Electronics N.V. | Backlight for lcd's |
| JP2001216826A (en) * | 2000-02-03 | 2001-08-10 | Ichikoh Ind Ltd | Backlight for color liquid crystal display |
| US20010052955A1 (en) * | 2000-06-08 | 2001-12-20 | Fujitsu Limited | Backlight unit and liquid crystal device using backlight units |
| CN2877307Y (en) * | 2006-04-29 | 2007-03-14 | 昆明市三机通用设备厂 | Machine for cooking noodle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000010096A (en) * | 1998-06-23 | 2000-01-14 | Hitachi Ltd | Liquid crystal display device |
-
2002
- 2002-11-01 CN CNB02150332XA patent/CN100365481C/en not_active Expired - Lifetime
-
2003
- 2003-01-08 WO PCT/CN2003/000009 patent/WO2004040362A1/en not_active Application Discontinuation
- 2003-01-08 AU AU2003301699A patent/AU2003301699A1/en not_active Abandoned
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0990135A (en) * | 1995-09-26 | 1997-04-04 | Buraito Kenkyusho:Kk | Backlight for liquid crystal display |
| EP0854318A1 (en) * | 1997-01-15 | 1998-07-22 | Siemens Aktiengesellschaft | Flat panel display |
| CN1285525A (en) * | 1999-08-20 | 2001-02-28 | 国际商业机器公司 | Liquid cyrstal display, background light unit, and fluorescent tube for background light unit |
| WO2001044715A1 (en) * | 1999-12-17 | 2001-06-21 | Koninklijke Philips Electronics N.V. | Backlight for lcd's |
| JP2001216826A (en) * | 2000-02-03 | 2001-08-10 | Ichikoh Ind Ltd | Backlight for color liquid crystal display |
| US20010052955A1 (en) * | 2000-06-08 | 2001-12-20 | Fujitsu Limited | Backlight unit and liquid crystal device using backlight units |
| CN2877307Y (en) * | 2006-04-29 | 2007-03-14 | 昆明市三机通用设备厂 | Machine for cooking noodle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1493902A (en) | 2004-05-05 |
| WO2004040362A1 (en) | 2004-05-13 |
| AU2003301699A8 (en) | 2004-05-25 |
| AU2003301699A1 (en) | 2004-05-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: YOUDA PHOTOELECTRIC CO., LTD. Free format text: FORMER NAME OR ADDRESS: GUANGHUI ELECTRONIC CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Hsinchu, Taiwan, China Patentee after: AU OPTRONICS Corp. Address before: Taiwan, China Patentee before: QUANTA DISPLAY INCORPORATION |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080130 |