CN100451770C - Back light module - Google Patents
Back light module Download PDFInfo
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- CN100451770C CN100451770C CNB2007100973716A CN200710097371A CN100451770C CN 100451770 C CN100451770 C CN 100451770C CN B2007100973716 A CNB2007100973716 A CN B2007100973716A CN 200710097371 A CN200710097371 A CN 200710097371A CN 100451770 C CN100451770 C CN 100451770C
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- light emitting
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- guide plate
- emitting diode
- emitting diodes
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Abstract
A back light plate is prepared for setting light source set with light guide plate on reflection plate, setting a numbers of the first LED being set in adjacent to and faces on the first side of light guide plate on light source, setting a numbers of the second LED to be upwards to external side of the first LED or to the second side of light guide plate and arranging optical film on light source set.
Description
Technical field
The present invention relates to a kind of backlight module, particularly relating to a kind of is the backlight module of light source with the light emitting diode.
Background technology
Backlight module can be divided into side-light type light inlet (edge lighting) and two kinds of straight-down negative light inlets (bottom lighting) according to the difference of light source incoming position, generally speaking mainly is made up of three parts: lampshade, blooming piece and light source.Be used in various information, communication, consumer products at present, LCD (Liquid Crystal Display, LCD) area source of the said goods is provided.
The normal light source that uses of known backlight module is in respect of cathode fluorescent tube (Cold CathodeFluorescent Lamp; CCFL) and thermal cathode fluorescent tube, light emitting diode (Light-EmittingDiode, LED), electroluminescence sheet (Electro-Luminescence, EL) etc., because the volume of line sources such as cathode fluorescent tube and hot-cathode fluorescent lamp is bigger, therefore general hand-held electronic product just adopts the idiopathic light source of pointolites such as the less light emitting diode of volume, electroluminescence sheet as LCD.
The good light electrical characteristics such as coloured light that light emitting diode has low power consumption, lower calorific value, operation lifetime length, impact resistance, volume is little, reaction velocity is fast and can send wavelength stabilization often are applied to the pilot lamp of household electrical appliances, instrument, the using light source and the photoelectric communication field of photovoltaic.And, therefore come into one's own gradually with the backlight module of light emitting diode as light source because comparatively power consumption of cold cathode fluorescent tube adds and has cold-starting and is difficult for and environmental pollution problems.
With the straight-down negative light-emitting diode (LED) backlight module of light emitting diode as light source, please refer to Fig. 1, be a kind of large-size direct following formula light-emitting diode (LED) backlight module the Lights section diagrammatic cross-section according to known technology illustrated.Owing to, need at least two light guide plate could effectively contain all parts of display panel for being applicable to the backlight of large scale display panel.The light-emitting diode component 106,108 that the LED backlight light source comprises light guide plate 102,104 and is positioned at the light guide plate both sides, blooming 110 is arranged on the light-emitting diode component 106,108.But,, therefore, inevitably can be created in two light- emitting diode components 106 and 108 generation one idle spaces (Dead Space) 112, shown in dashed circle because 102,104 need of light guide plate are provided with light-emitting diode component 106 and 108.Because the existence of idle space 112, the display panels of the straight-down negative light-emitting diode (LED) backlight module framework that tool is traditional can produce concealed wire (Line-Mura) phenomenon.Please refer to Fig. 2, be the view of display panel with concealed wire phenomenon, show in traditional straight-down negative light-emitting diode (LED) backlight module the distance between the light guide plate formed laterally with vertical concealed wire.Need to reduce the spacing between light emitting diode, improve the density of light emitting diode, but the light emitting diode number is significantly risen, obviously increase cost.
Summary of the invention
The object of the present invention is to provide a kind of light-emitting diode (LED) backlight module, solve the problem that known light-emitting diode (LED) backlight module can produce the concealed wire phenomenon.
To achieve these goals, the invention provides a kind of backlight module, comprise a reflecting plate, a light sources and a blooming.Light sources comprises light guide plate and the light source that is positioned on the reflecting plate, and light source can be several light emitting diodes.Wherein light emitting diode can be divided into two groups, and first group has several first light emitting diodes, is arranged at the opposite side of light guide plate in the mode towards the top; Second group has several second light emitting diodes, with towards and the mode that is close to light guide plate be arranged at a side.And blooming then is to be arranged on the light sources.The brightness of first light emitting diode can be identical with second light emitting diode, also can be darker than second light emitting diode.Blooming can be diffusion barrier, brightness enhancement film or both combinations.
To achieve these goals, the invention provides a kind of backlight module, comprise a reflecting plate, a light sources and a blooming.Light sources comprises first light guide plate, second light guide plate and the light source that is positioned on the reflecting plate, and light source can be several light emitting diodes.Wherein two light guide plate adjacent parallel are provided with.Light emitting diode can be divided into three groups, and first group has several first light emitting diodes, is arranged between first light guide plate and second light guide plate in the mode towards the top; Second group has several second light emitting diodes, towards and be close to the first side setting of first light guide plate; The 3rd group has several the 3rd light emitting diodes, towards and be close to the second side setting of second light guide plate.Wherein, first side of first light guide plate and second side of second light guide plate identical bits that can be positioned at light guide plate to or mutually dystopy to.The identical bits that can be positioned at light guide plate when second side of first side of first light guide plate and second light guide plate to the time, can comprise that also one has the four group group of several the 4th light emitting diodes.The 4th light emitting diode can be disposed immediately in first light guide plate first side the offside or the offside of second side of second light guide plate or be disposed immediately in simultaneously on above-mentioned two positions.And blooming then is to be arranged on the light sources.The brightness of first light emitting diode can be identical with second light emitting diode, also can be brighter than second light emitting diode.Blooming can be diffusion barrier, brightness enhancement film or both combinations.First light emitting diode can be identical with the brightness of second light emitting diode, also can be darker than second light emitting diode.In general the brightness of second light emitting diode and the 3rd light emitting diode and the 4th light emitting diode are suitable.Blooming can be diffusion barrier, brightness enhancement film or both combinations.
First light emitting diode that is added in embodiments of the present invention can compensate because of light guide plate side idle space (Dead Space) makes display panels and produce the problem of concealed wire.In addition, solve the quantity of the employed light emitting diode of concealed wire problem compares with the display panels of traditional straight-down negative light-emitting diode (LED) backlight module framework, backlight module provided by the present invention only need use 50% to 75% light emitting diode can solve the problem of concealed wire, can significantly reduce cost.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is a kind of large-size direct following formula light-emitting diode (LED) backlight module the Lights section diagrammatic cross-section according to known technology illustrated;
Fig. 2 is the view with display panel of concealed wire phenomenon;
Fig. 3 A to Fig. 3 C is a kind of backlight module diagrammatic cross-section according to a preferred embodiment of the present invention;
Fig. 4 A to Fig. 4 E is a kind of backlight module diagrammatic cross-section according to another preferred embodiment of the present invention.
Wherein, Reference numeral:
102,104,308,408,410: light guide plate
106,108,310a, 310b, 310c, 412a, 412b, 412c, 412d, 412e: light-emitting diode component
110,306,406: blooming
112: idle space
300: backlight module
302,402: reflecting plate
304,404: light sources
310,412: light source
Embodiment
In order to make feature of the present invention more clear, various embodiment of the present invention below will be described, the embodiment of various features for example, and described specific components with only arrange to simplifying this case explanation, be not in order to limit the present invention.In addition, this case may be reused reference number and literal in various embodiments, and the purpose of repetition is to simplify and clearly demonstrate, and is not in order to specify the relation between various embodiment and/or the described framework.
Please refer to Fig. 3 A to Fig. 3 C, be a kind of backlight module diagrammatic cross-section according to a preferred embodiment of the present invention.As shown in Figure 3A, the backlight module 300 that one embodiment of the invention provided comprises a reflecting plate 302, a light sources 304 and a blooming 306.Light sources 304 comprises light guide plate 308 and the light source 310 that is positioned on the reflecting plate 302, and light source can be several light emitting diodes.Wherein light emitting diode can be divided into two groups, and first group has several light emitting diodes 310a, is arranged at a side of light guide plate in the mode towards the top; Second group has several light emitting diodes 310b, with towards and be close to the mode of light guide plate 308 and the homonymy that light emitting diode 310a is arranged at light guide plate 308, this side of light guide plate 308 is an incidence surface.And blooming 306 then is to be arranged on the light sources 304.The brightness of light emitting diode 310a can be identical with light emitting diode 310b, also can be darker than light emitting diode 310b.Blooming 306 can be diffusion barrier, brightness enhancement film or both combinations.
Fig. 3 B is identical with Fig. 3 A haply, also provide a backlight module 300 with a reflecting plate 302, a light sources 304 and a blooming 306, and its difference is in light sources 304 and except the side in light guide plate 308 light emitting diode 310a and light emitting diode 310b is set, also the opposite side of light guide plate 308 with towards and the mode that is close to light guide plate 308 light emitting diode 310c is set.
Fig. 3 C is identical with Fig. 3 B haply, also provide a backlight module 300 with a reflecting plate 302, a light sources 304 and a blooming 306, and its difference is in light sources 304 and in a side of light guide plate 308 light emitting diode 310a only is set, and the opposite side of light guide plate 308 with towards and the mode that is close to light guide plate 308 light emitting diode 310c is set.
The present invention a side of light guide plate with towards above mode set up light emitting diode 310a, can compensate because of light guide plate side idle space (Dead Space) and make display panels can produce the problem of concealed wire.
In general, light emitting diode 310a to 310c in the present embodiment can have similar brightness, but it is brighter than light emitting diode 310a to be preferably light emitting diode 310b and 310c, and the brightness of light emitting diode 310a is preferably 1/3 to 2/3 of light emitting diode 310b and 310c brightness, more preferably is 50%.The light sources 304 that Fig. 3 A to Fig. 3 C is illustrated is that a unit is formed substantially, also can use several light sources 304 combinations afterwards as Backlight For Liquid Crystal Display Panels in practice.Have, all light emitting diodes also can be arranged at three sides of light guide plate or whole sides again.
Being used as Backlight For Liquid Crystal Display Panels about how making up several light sources 304, the invention provides another embodiment, is that example is illustrated with two groups of light sources 304.Fig. 4 A to Fig. 4 E is a kind of backlight module diagrammatic cross-section according to another preferred embodiment of the present invention.Shown in Fig. 4 A, the backlight module 400 that one embodiment of the invention provided comprises a reflecting plate 402, a light sources 404 and a blooming 406.Light sources 404 comprises two light guide plate 408,410 and the light sources 412 that are positioned on the reflecting plate 402, and light source 412 can be several light emitting diodes.Wherein light emitting diode can be divided into three groups, and first group has several light emitting diodes 412a, is arranged between two light guide plate 408,410 in the mode towards the top; Second group has several light emitting diodes 412b, with towards and the mode that is close to light guide plate 408 left sides be provided with, the left surface of light guide plate 408 is an incidence surface.The 3rd group has several light emitting diodes 412c, with towards and the mode that is close to light guide plate 410 right sides be provided with, the right flank of light guide plate 410 is an incidence surface.And blooming 406 then is to be arranged on the light sources 404.The brightness of light emitting diode 412a can be identical with light emitting diode 412b and light emitting diode 412c, also can be darker than light emitting diode 412b and light emitting diode 412c.Blooming 406 can be diffusion barrier, brightness enhancement film or both combinations.
Fig. 4 B is identical with Fig. 4 A haply, also provide a backlight module 400 with a reflecting plate 402, a light sources 404 and a blooming 406, and its difference to be in light sources 404 be that light emitting diode 412d is provided with in the mode on right side of next-door neighbour's light guide plate 408, and light emitting diode 412e is provided with to constitute light source 412 in the mode in the left side of next-door neighbour's light guide plate 410, the left surface of the right flank of light guide plate 408 and light guide plate 410 is incidence surface.So, light emitting diode 412a will be between light emitting diode 412d and light emitting diode 412e.The brightness of light emitting diode 412a can be identical with light emitting diode 412d and light emitting diode 412e, also can be darker than light emitting diode 412d and light emitting diode 412e.Blooming 406 can be diffusion barrier, brightness enhancement film or both combinations.
Fig. 4 C is identical with Fig. 4 B haply, also provide a backlight module 400 with a reflecting plate 402, a light sources 404 and a blooming 406, and its difference is in light sources 404 except with being provided with light emitting diode 412a, light emitting diode 412d and the light emitting diode 412e shown in Fig. 4 B, also light emitting diode 412c is provided with to constitute light source 412 in the mode on the right side of next-door neighbour's light guide plate 410, the left surface and the right flank of the left surface of light guide plate 408 and light guide plate 410 are incidence surface.So, light emitting diode 412a is still between light emitting diode 412d and light emitting diode 412e.Light emitting diode 412a can be identical with the brightness of light emitting diode 412c, light emitting diode 412d and light emitting diode 412e, also can be darker than light emitting diode 412c, light emitting diode 412d and light emitting diode 412e.Blooming 406 can be diffusion barrier, brightness enhancement film or both combinations.
Fig. 4 D is identical with Fig. 4 A haply, also provide a backlight module 400 with a reflecting plate 402, a light sources 404 and a blooming 406, its difference is in light sources 404 except with setting shown in Fig. 4 A and light source 412, light source 412 comprises outside light emitting diode 412a, light emitting diode 412b and the light emitting diode 412c, also light emitting diode 412d is provided with in the mode on the right side of next-door neighbour's light guide plate 408, the left surface of the left surface of light guide plate 408 and right flank and light guide plate 410 is incidence surface.Light emitting diode 412a can be identical with the brightness of light emitting diode 412b, light emitting diode 412c and light emitting diode 412d, also can be darker than light emitting diode 412b, light emitting diode 412c and light emitting diode 412d.Blooming 406 can be diffusion barrier, brightness enhancement film or both combinations.
Fig. 4 E also provides a backlight module 400 with a reflecting plate 402, a light sources 404 and a blooming 406.Light sources 404 has two light guide plate 408,410 and light sources 412, light source 412 comprises light emitting diode 412a, be arranged between two light guide plate 408,410 in the mode towards the top, light emitting diode 412b, light emitting diode 412c, light emitting diode 412d and light emitting diode 412e are provided with in the mode of left and right side of next-door neighbour's light guide plate 408,410 respectively.The left and right side of light guide plate 408,410 is incidence surface.Light emitting diode 412a can have suitable brightness with other light emitting diode, or darker than other light emitting diode.Same, blooming 406 can be diffusion barrier, brightness enhancement film or both combinations.
In general, light emitting diode 412a to 412e in the present embodiment can have similar brightness, but it is brighter than light emitting diode 412a to be preferably light emitting diode 412b to 412e, and the brightness of light emitting diode 412a is preferably 1/3 to 2/3 of light emitting diode 412b to 412e brightness, more preferably is 50%.
By the invention described above preferred embodiment as can be known, the invention provides a backlight module, can be applicable on the LCD.First light emitting diode that is added in embodiments of the present invention can compensate because of light guide plate side idle space (Dead Space) and makes display panels can produce the problem of concealed wire.In addition, compare for the quantity of the light emitting diode that solves the concealed wire problem and use with the display panels of traditional straight-down negative light-emitting diode (LED) backlight module framework, backlight module provided by the present invention only need use 50% to 75% light emitting diode can solve the problem of concealed wire, can significantly reduce cost.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (18)
1, a kind of backlight module is characterized in that, comprising:
One reflecting plate;
One light sources comprises: a light guide plate is positioned on this reflecting plate; One light source, be arranged on this reflecting plate, this light source comprises again: several second light emitting diodes, be arranged at towards and be close to first side of this light guide plate, and several first light emitting diodes, be arranged at the outside of these second light emitting diodes or second side of this light guide plate towards the top, the brightness of described second light emitting diode is more than or equal to the brightness of described first light emitting diode;
One blooming is arranged on this light sources.
2, backlight module according to claim 1 is characterized in that, the brightness of these first light emitting diodes be these second light emitting diodes brightness 1/3 to 2/3.
3, backlight module according to claim 1 is characterized in that, the brightness of these first light emitting diodes is half of brightness of these second light emitting diodes.
4, backlight module according to claim 3 is characterized in that, also comprises several the 3rd light emitting diodes, closely towards this second side setting of this light guide plate.
5, backlight module according to claim 4 is characterized in that, the brightness of these the 3rd light emitting diodes and these second light emitting diodes is close.
6, a kind of backlight module is characterized in that, comprises at least:
One reflecting plate;
One light sources comprises: one first light guide plate is positioned on this reflecting plate; One second light guide plate is positioned on this reflecting plate, and is provided with this first light guide plate adjacent parallel; An and light source, be arranged on this reflecting plate, this light source comprises again: several first light emitting diodes, be arranged between this first light guide plate and this second light guide plate towards the top, several second light emitting diodes, towards the first side setting of this first light guide plate, and several the 3rd light emitting diodes, towards the second side setting of this second light guide plate, the brightness of described second light emitting diode is more than or equal to the brightness of described first light emitting diode;
One blooming is arranged on this light sources.
7, backlight module according to claim 6 is characterized in that, the brightness of these the 3rd light emitting diodes and these second light emitting diodes is close.
8, backlight module according to claim 6 is characterized in that, the brightness of these first light emitting diodes be these second light emitting diodes brightness 1/3 to 2/3.
9, backlight module according to claim 6 is characterized in that, the brightness of these first light emitting diodes is half of brightness of these second light emitting diodes.
10, backlight module according to claim 6 is characterized in that, this first side of this first light guide plate and this second side of this second light guide plate are the light inlet side.
11, backlight module according to claim 6 is characterized in that, this first side of this this second light guide plate of second side of this first light guide plate is the light inlet side.
12, backlight module according to claim 10 is characterized in that, this first side is adjacent with this second side.
13, backlight module according to claim 10 is characterized in that, also comprises several the 4th light emitting diodes, closely towards the couple positioned opposite of this first side of this first light guide plate.
14, backlight module according to claim 11 is characterized in that, also comprises several the 4th light emitting diodes, closely towards the couple positioned opposite of this first side of this first light guide plate.
15, backlight module according to claim 10 is characterized in that, also comprises several the 4th light emitting diodes, closely towards the couple positioned opposite of this second side of the opposite side of this first side of this first light guide plate and this second light guide plate.
16, backlight module according to claim 11 is characterized in that, also comprises several the 4th light emitting diodes, closely towards the couple positioned opposite of this second side of the opposite side of this first side of this first light guide plate and this second light guide plate.
According to claim 13,14,15 or 16 described backlight modules, it is characterized in that 17, the brightness of the brightness of these the 4th light emitting diodes and these second light emitting diodes is close.
18, according to claim 11,12,13 or 14 described backlight modules, it is characterized in that the brightness of these the 4th light emitting diodes is higher than the brightness of these first light emitting diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100973716A CN100451770C (en) | 2007-05-11 | 2007-05-11 | Back light module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100973716A CN100451770C (en) | 2007-05-11 | 2007-05-11 | Back light module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101051153A CN101051153A (en) | 2007-10-10 |
| CN100451770C true CN100451770C (en) | 2009-01-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100973716A Expired - Fee Related CN100451770C (en) | 2007-05-11 | 2007-05-11 | Back light module |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963306A (en) * | 2009-07-24 | 2011-02-02 | 康佳集团股份有限公司 | Ultrathin LED backlight module and liquid crystal television |
| CN102128398B (en) * | 2011-03-21 | 2013-05-01 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN202165943U (en) | 2011-07-21 | 2012-03-14 | 北京京东方光电科技有限公司 | Backlight and display device |
| TWI533058B (en) * | 2011-11-07 | 2016-05-11 | 友達光電股份有限公司 | Backlight module |
| JP5634647B1 (en) * | 2012-12-03 | 2014-12-03 | シチズンホールディングス株式会社 | LED module |
| CN110221479B (en) * | 2019-07-19 | 2022-05-17 | 武汉天马微电子有限公司 | Backlight module and display device |
| CN111367122A (en) * | 2020-04-03 | 2020-07-03 | 深圳市隆利科技股份有限公司 | Light guide LED lamp panel |
| CN111487810A (en) * | 2020-04-21 | 2020-08-04 | 深圳市隆利科技股份有限公司 | Area light source backlight module |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040190308A1 (en) * | 2003-03-31 | 2004-09-30 | Che-Chih Chang | Backlight module |
| CN1558283A (en) * | 2004-01-30 | 2004-12-29 | 友达光电股份有限公司 | Backlight module |
| US20060098441A1 (en) * | 2004-11-05 | 2006-05-11 | Au Optronics Corp. | Backlight module |
| EP1701204A1 (en) * | 2005-03-08 | 2006-09-13 | Sony Corporation | Backlight device and liquid crystal display apparatus |
-
2007
- 2007-05-11 CN CNB2007100973716A patent/CN100451770C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040190308A1 (en) * | 2003-03-31 | 2004-09-30 | Che-Chih Chang | Backlight module |
| CN1558283A (en) * | 2004-01-30 | 2004-12-29 | 友达光电股份有限公司 | Backlight module |
| US20060098441A1 (en) * | 2004-11-05 | 2006-05-11 | Au Optronics Corp. | Backlight module |
| EP1701204A1 (en) * | 2005-03-08 | 2006-09-13 | Sony Corporation | Backlight device and liquid crystal display apparatus |
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| CN101051153A (en) | 2007-10-10 |
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