CN103851415B - Light back light unit and liquid crystal indicator is entered for the side of liquid crystal indicator - Google Patents
Light back light unit and liquid crystal indicator is entered for the side of liquid crystal indicator Download PDFInfo
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- CN103851415B CN103851415B CN201210513272.2A CN201210513272A CN103851415B CN 103851415 B CN103851415 B CN 103851415B CN 201210513272 A CN201210513272 A CN 201210513272A CN 103851415 B CN103851415 B CN 103851415B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 32
- 238000009792 diffusion process Methods 0.000 claims abstract description 8
- 238000004020 luminiscence type Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000005755 formation reaction Methods 0.000 claims description 4
- 230000002708 enhancing Effects 0.000 abstract description 3
- 230000000875 corresponding Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000003287 optical Effects 0.000 description 2
- 230000001105 regulatory Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The invention discloses a kind of side for liquid crystal indicator and enter light back light unit and corresponding liquid crystal indicator.Described side enters light backlight module and includes light guide plate, is arranged at the reflecting plate bottom light guide plate, is arranged at the light source module of light guide plate sidepiece and is arranged at diffusion layer and the layers of prisms at light guide plate top；Described light source module includes and light guide plate sidepiece is oppositely arranged reflecting assembly and the multiple light-emitting diode components being disposed side by side between reflecting assembly and light guide plate sidepiece；Described light-emitting diode component includes at least one luminous end the first light emitting diode towards described light guide plate sidepiece and at least one luminous end the second Light-Emitting Diode towards described reflecting assembly；Wherein, described reflecting assembly for reflexing to the first light emitting diode in described light guide plate sidepiece forms dark space by the light of described second light emitting diode.Invention enhances the illuminance distribution of back light unit, optimize the performance of liquid crystal indicator.
Description
Technical field
The present invention relates to liquid crystal display manufacturing technology field, particularly relate to a kind of for liquid crystal indicator
Side enters light back light unit and liquid crystal indicator.
Background technology
Liquid crystal molecule in liquid crystal indicator is the most luminous, but by liquid crystal molecule turn to extent control
By the light intensity of pixel region thus realize display function.The light source of liquid crystal indicator is mounted in liquid crystal
Display floater back light unit below, back light unit is used for as the well-off brightness of display panels and divides
The uniform light source of cloth so that it is can normal show image.Back light unit arranges position can be divided into according to light source
The end, enters light type and side enters light type.The end, enters the light source of light back light unit and is arranged on the bottom of light guide plate of backlight unit,
And side enters the light source of light back light unit and is arranged on the side of light guide plate.Side enters light back light unit
Existing back light unit generally uses cold-cathode tube (CCFL) or external-electrode fluorescent lamp (EEFL) etc. glimmering
Light pipe is as the light source of back light unit.Recently, light emitting diode (LED) as back light unit light source gradually
Become main flow.Light emitting diode, compared with conventional fluorescent tube, has the life-span long, low cost, energy consumption be low,
The advantages such as color reducibility is good.
But, use light emitting diode, as the back light unit of light source, Lampyridea phenomenon easily occurs.Fig. 1 is
Existing side enters the structural representation of light back light unit.As it is shown in figure 1, back light unit 10 includes light-emitting diodes
Pipe 11 and light guide plate 12.Because light emitting diode 11 is as point source, its light-emitting zone is taper, so
In the incident side of light guide plate 12, two lumination of light emitting diode zone boundary intersection location, easily occur dark
District (dark space), similarly, in the center in lumination of light emitting diode region, brightness is maximum, institute
So that clear zone (brightness space) easily to occur.The existence of clear zone and dark space can destroy sending out of back light unit
Optical uniformity, affects the performance of liquid crystal indicator.
Although, prior art US7350959B2 uses the mode at light guide plate incident side composition sunk structure to try
Figure improves brightness uniformity, but, use the back light unit of this structure to appoint so and there is obvious dark space and clear zone.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of side for liquid crystal indicator and enters light back light unit
And liquid crystal indicator, the light distributing homogeneity improving back light unit optimizes the performance of liquid crystal indicator.
The invention discloses a kind of side for liquid crystal indicator and enter light back light unit, including light guide plate, if
It is placed in the reflecting plate bottom light guide plate, is arranged at the light source module of light guide plate sidepiece and is arranged at light guide plate top
The diffusion layer in portion and layers of prisms；
Described light source module includes the reflecting assembly being oppositely arranged with light guide plate sidepiece and is disposed side by side on reflective
Multiple light-emitting diode components between assembly and light guide plate sidepiece；
Described light-emitting diode component includes the first luminescence towards described light guide plate sidepiece of at least one luminous end
Diode and at least one luminous end are towards the second Light-Emitting Diode of described reflecting assembly；
Wherein, described reflecting assembly is for reflexing to the first luminescence two by the light of described second light emitting diode
Pole pipe is in described light guide plate sidepiece forms dark space.
Preferably, described reflecting assembly is plane or the curved surface of reflectorized material formation.
Preferably, described reflecting assembly is provided with projection knot in the position relative with described second light emitting diode
Structure.
Preferably, described raised structures is pyramid, cone or prismatic table shape.
Preferably, described first light emitting diode and described second light emitting diode are set up in parallel；Or
The described first non-luminous end of light emitting diode and described second light emitting diode non-luminous end phase
To setting.
The invention also discloses a kind of liquid crystal indicator, enter light back light unit and display panels including side,
Wherein said side enters light back light unit and includes light guide plate, is arranged at the reflecting plate bottom light guide plate, is arranged at and leads
The light source module of tabula rasa sidepiece and be arranged at diffusion layer and the layers of prisms at light guide plate top；
Described light source module includes the reflecting assembly being oppositely arranged with light guide plate sidepiece and is disposed side by side on reflective
Multiple light-emitting diode components between assembly and light guide plate sidepiece；
Described light-emitting diode component includes the first luminescence towards described light guide plate sidepiece of at least one luminous end
Diode and at least one luminous end are towards the second Light-Emitting Diode of described reflecting assembly；
Wherein, described reflecting assembly is for reflexing to the first luminescence two by the light of described second light emitting diode
Pole pipe is in described light guide plate sidepiece forms dark space.
Preferably, described reflecting assembly is plane or the curved surface of reflectorized material formation.
Preferably, described reflecting assembly is provided with projection knot in the position relative with described second light emitting diode
Structure.
Preferably, described raised structures is pyramid, cone or prismatic table shape.
Preferably, described first light emitting diode and described second light emitting diode are set up in parallel；Or
The described first non-luminous end of light emitting diode and described second light emitting diode non-luminous end phase
To setting.
The present invention passes through to arrange reflecting assembly and the light emitting diode in the face of reflecting assembly in back light unit,
The dark space formed towards the light of the light emitting diode of light guide plate in back light unit is compensated, thus increases
The strong illuminance distribution of back light unit, optimizes the performance of liquid crystal indicator.
Accompanying drawing explanation
Fig. 1 is the structural representation that existing side enters light back light unit；
Fig. 2 is the end face schematic diagram that the side of first embodiment of the invention enters light back light unit；
Fig. 3 is the schematic cross-section along A-A ' that the side of first embodiment of the invention enters light back light unit；
Fig. 4 is that the side of first embodiment of the invention enters light back light unit reflecting assembly and is set to the cross section of curved surface and shows
It is intended to；
Fig. 5 is the end face schematic diagram that the side of second embodiment of the invention enters light back light unit；
Fig. 6 is that the side of second embodiment of the invention enters the light back light unit schematic cross-section along B-B '；
Fig. 7 is that the Luminance Distribution of the back light unit of second embodiment of the invention the present embodiment that emulation obtains is with existing
There is the comparison diagram of the Luminance Distribution of the back light unit of technology；
Fig. 8 is the end face schematic diagram that the side of third embodiment of the invention enters light back light unit；
Fig. 9 is the schematic cross-section of the liquid crystal indicator of fourth embodiment of the invention.
Detailed description of the invention
Further illustrate technical scheme below in conjunction with the accompanying drawings and by detailed description of the invention.
Fig. 2 is the end face schematic diagram that the side of first embodiment of the invention enters light back light unit.Fig. 3 is the present invention
The side of first embodiment enters the schematic cross-section along A-A ' of light back light unit.As shown in Figures 2 and 3, side
Enter light back light unit 20 and include light guide plate 21, be arranged at the reflecting plate 22 bottom light guide plate, be arranged at leaded light
The light source module 23 of plate sidepiece and be arranged at diffusion layer 24 and the layers of prisms 25 at light guide plate top；
Light source module 23 includes the reflecting assembly 231 being oppositely arranged with light guide plate sidepiece 211 and is arranged side by side
Multiple light-emitting diode components 232 between reflecting assembly and light guide plate sidepiece；
Light-emitting diode component 232 includes that at least one luminous end is towards the first of described light guide plate sidepiece 211
Light emitting diode 232a and at least one luminous end are towards the second Light-Emitting Diode 232b of reflecting assembly 231.
During back light unit work, the light that the first light emitting diode 232a sends is at light guide plate sidepiece 211, also
The i.e. incident side of light guide plate can form dark space and clear zone, but, by arranging the second light emitting diode with luminous
The distance of inter-module and/or the shape of reflecting assembly, so that the light that the second light emitting diode 232b sends
Line reflects rear portion through reflecting assembly 231 and enters light guide plate from dark space, thus safety has been carried out brightness benefit
Repay so that the brightness uniformity of incident side improves, and and then the brightness uniformity of whole back light unit is carried
High.
Illustrate only each light-emitting diode component 232 in figs. 2 and 3 and include two luminescences of a positive and a negative
Diode, it will be recognized to those skilled in the art that for the intensity and the effect that regulate compensation, Ke Yigen
According to needs, multiple first Light-Emitting Diode and/or multiple second light emitting diode are set.
Meanwhile, light-emitting diode component 232 is along the straight line parallel with the limit of incident side also in figs. 2 and 3
Row is spaced, but, it will be understood by those skilled in the art that the side that can also use other as required
Formula, such as, point two between-line spacing arrangements, or be spaced by curve.
Light-emitting diode component 232 can be installed fixing by printed circuit board or alternate manner.
Reflecting assembly 231 can be provided with the planar shaped that reflectorized material is formed as shown in Figures 2 and 3.
In another preferred implementation of the present embodiment, reflecting assembly 231 is it can also be provided that as shown in Figure 4
Curved surface.
The present embodiment makes in back light unit by arranging reflecting assembly and the Light-Emitting Diode in the face of reflecting assembly
The dark space formed towards the light of the light emitting diode of light guide plate is compensated, thus enhances back light unit
Illuminance distribution.
Fig. 5 is the end face schematic diagram that the side of second embodiment of the invention enters light back light unit.Fig. 6 is the present invention
The side of the second embodiment enters the light back light unit schematic cross-section along B-B '.As shown in Figure 5 and Figure 6, side enters
Light back light unit 50 includes light guide plate 51, is arranged at the reflecting plate 52 bottom light guide plate, is arranged at light guide plate
The light source module 53 of sidepiece and be arranged at diffusion layer 54 and the layers of prisms 55 at light guide plate top；
Light source module 53 includes the reflecting assembly 531 being oppositely arranged with light guide plate sidepiece 511 and is arranged side by side
Multiple light-emitting diode components 532 between reflecting assembly and light guide plate sidepiece；
Light-emitting diode component 532 includes that at least one luminous end is towards the first of described light guide plate sidepiece 511
Light emitting diode 532a and at least one luminous end are towards the second Light-Emitting Diode 532b of reflecting assembly 531.
Wherein, reflecting assembly 531 has raised structures in the position relative for light emitting diode 532b with second,
To change the reflection characteristic of this position, such that it is able to fix at light emitting diode 532b and reflection subassembly distance
In the case of adjust reflection light circuit so that reflecting assembly reflection reflection light can be accurately to incident side
Dark space compensates.In the preferred implementation shown in Fig. 5 and Fig. 6, described raised structures is by for pyramid
Shape, it light path as illustrated can reflect the light that the second light emitting diode is launched.Similarly, raised structures
It is not limited to above-mentioned pyramid, as long as the raised structures of reflected light path can be adjusted, such as cone,
Prismatic table shape etc. all can be applicable to the present embodiment.
Fig. 7 is that emulation obtains the Luminance Distribution of the back light unit of the present embodiment and the back light unit of prior art
The comparison diagram of Luminance Distribution.Gray scale in figure identifies optical power density corresponding to this region (namely brightness), root
The backlight module of prior art it is much stronger than according to the brightness uniformity of the backlight module of the present embodiment knowable to Fig. 7.
Illustrate only each light-emitting diode component 532 in fig. 5 and fig. and include two luminescences of a positive and a negative
Diode, it will be recognized to those skilled in the art that for the intensity and the effect that regulate compensation, Ke Yigen
According to needs, multiple first Light-Emitting Diode and/or multiple second light emitting diode are set.
Meanwhile, light-emitting diode component 532 is along the straight line parallel with the limit of incident side also in fig. 5 and fig.
Row is spaced, but, it will be understood by those skilled in the art that the side that can also use other as required
Formula, such as, point two between-line spacing arrangements, or be spaced by curve.
Light-emitting diode component 532 can be installed fixing by printed circuit board or alternate manner.
Similarly, in another preferred implementation of the present embodiment, reflecting assembly 531 can also be arranged
For curved surface.
The present embodiment by arranging raised structures further, can reflecting assembly and the second light emitting diode away from
Reflected light path can not be adjusted by raised structures in the case of regulating, it is achieved for catheter plate from less or distance
The compensation of incident side dark space, accurately regulates the Luminance Distribution of light guide plate.
Fig. 8 is the end face schematic diagram that the side of third embodiment of the invention enters light back light unit.As shown in Figure 8,
3rd embodiment and above-described embodiment difference are the first light emitting diode of light-emitting diode component 832
832a and the second light emitting diode 832b is arranged in the way of luminous end is not relative, namely with " back-to-back "
Mode is arranged.Although the width that such set-up mode makes light source module 83 increases, but relative to first
The mode that in embodiment and the second embodiment, light emitting diode is set up in parallel, owing to light emitting diode is as a light
Source is in identical position in the projection of light guide plate 81 lateral plane, and the second light emitting diode 832b sends
The reflection path of light is more controllable, and the precision of the luminance compensation of its light guide plate 81 is higher.
The present embodiment, by making the first light emitting diode and the second light emitting diode " back-to-back " arrange, carries
The high controllability of reflection pipeline, improves the precision of dark space luminance compensation
Fig. 9 is the schematic cross-section of the liquid crystal indicator of fourth embodiment of the invention.As it is shown in figure 9, liquid
Crystal device 90 includes that side enters light back light unit 92 and display panels 91, and wherein side enters light backlight list
Unit 92 includes light guide plate 921, is arranged at the reflecting plate 922 bottom light guide plate, is arranged at light guide plate sidepiece
Light source module 923 and be arranged at diffusion layer 924 and the layers of prisms 925 at light guide plate top.
Light source module 23 includes the reflecting assembly 9231 being oppositely arranged with light guide plate sidepiece 9211 and sets side by side
Put the multiple light-emitting diode components 9232 between reflecting assembly and light guide plate sidepiece.
Light-emitting diode component 9232 includes at least one luminous end towards described light guide plate sidepiece 9211
One light emitting diode and at least one luminous end are towards the second Light-Emitting Diode of reflecting assembly 9231.
Wherein, reflecting assembly 9231 is for reflexing to the first luminescence two by the light of described second light emitting diode
Pole pipe is in described light guide plate sidepiece forms dark space.
In a preferred implementation of the present embodiment, the plane that reflecting assembly 9231 is formed for reflectorized material.
In another preferred implementation of the present embodiment, reflecting assembly 9231 forms curved surface for reflectorized material.
In another preferred implementation of the present embodiment, reflecting assembly 9231 with the second light emitting diode
Relative position is provided with the raised structures for regulating reflected light path, and described raised structures can be formed as rib
Taper, cone or prismatic table shape.Certainly, it will be understood by those skilled in the art that can also as required by
Raised structures is formed as other shape.This embodiment can reduce width and the volume of light source module, full
The requirement of foot miniaturization.
In another preferred implementation of the present embodiment, the first light emitting diode and the second light emitting diode
In the way of luminous end is not relative, can arrange to improve the controllability of light path, improves luminance compensation precision.
The present embodiment makes in back light unit by arranging reflecting assembly and the Light-Emitting Diode in the face of reflecting assembly
The dark space formed towards the light of the light emitting diode of light guide plate is compensated, thus enhances back light unit
Illuminance distribution, optimizes the performance of liquid crystal indicator.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for this area skill
For art personnel, the present invention can have various change and change.All institutes within spirit and principles of the present invention
Any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (6)
1. the side for liquid crystal indicator enters a light back light unit, including light guide plate, is arranged at light guide plate
The reflecting plate of bottom, is arranged at the light source module of light guide plate sidepiece and is arranged at the diffusion layer at light guide plate top
And layers of prisms；
Described light source module includes the reflecting assembly being oppositely arranged with light guide plate sidepiece and is disposed side by side on reflective
Multiple light-emitting diode components between assembly and light guide plate sidepiece；
Described light-emitting diode component includes the first luminescence towards described light guide plate sidepiece of at least one luminous end
Diode and at least one luminous end are towards the second Light-Emitting Diode of described reflecting assembly；
Wherein, described reflecting assembly is for reflexing to the first luminescence two by the light of described second light emitting diode
Pole pipe is in described light guide plate sidepiece forms dark space；
Described reflecting assembly is plane or the curved surface of reflectorized material formation；
Described reflecting assembly is provided with raised structures in the position relative with described second light emitting diode.
Side for liquid crystal indicator the most according to claim 1 enters light back light unit, and its feature exists
In, described raised structures is pyramid, cone or prismatic table shape.
Side for liquid crystal indicator the most according to claim 1 enters light back light unit, and its feature exists
In, described first light emitting diode and described second light emitting diode are set up in parallel；Or
The described first non-luminous end of light emitting diode and described second light emitting diode non-luminous end phase
To setting.
4. a liquid crystal indicator, enters light back light unit and display panels, wherein said side including side
Enter light back light unit and include light guide plate, be arranged at the reflecting plate bottom light guide plate, be arranged at light guide plate sidepiece
Light source module and be arranged at diffusion layer and the layers of prisms at light guide plate top；
Described light source module includes the reflecting assembly being oppositely arranged with light guide plate sidepiece and is disposed side by side on reflective
Multiple light-emitting diode components between assembly and light guide plate sidepiece；
Described light-emitting diode component includes the first luminescence towards described light guide plate sidepiece of at least one luminous end
Diode and at least one luminous end are towards the second Light-Emitting Diode of described reflecting assembly；
Wherein, described reflecting assembly is for reflexing to the first luminescence two by the light of described second light emitting diode
Pole pipe is in described light guide plate sidepiece forms dark space；
Described reflecting assembly is plane or the curved surface of reflectorized material formation；
Described reflecting assembly is provided with raised structures in the position relative with described second light emitting diode.
Liquid crystal indicator the most according to claim 4, it is characterised in that described raised structures is rib
Taper, cone or prismatic table shape.
Liquid crystal indicator the most according to claim 4, it is characterised in that described first light-emitting diodes
Pipe and described second light emitting diode are set up in parallel；Or
The described first non-luminous end of light emitting diode and described second light emitting diode non-luminous end phase
To setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210513272.2A CN103851415B (en) | 2012-12-04 | Light back light unit and liquid crystal indicator is entered for the side of liquid crystal indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210513272.2A CN103851415B (en) | 2012-12-04 | Light back light unit and liquid crystal indicator is entered for the side of liquid crystal indicator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103851415A CN103851415A (en) | 2014-06-11 |
| CN103851415B true CN103851415B (en) | 2016-11-30 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1900794A (en) * | 2006-07-27 | 2007-01-24 | 友达光电股份有限公司 | Light emitting unit and back light module |
| CN101346729A (en) * | 2005-10-24 | 2009-01-14 | 科格内克斯科技和投资公司 | Integrated illumination assembly for symbology reader |
| CN201555153U (en) * | 2009-12-01 | 2010-08-18 | 深圳帝光电子有限公司 | Uniform high-brightness side-light type backlight source |
| CN102705763A (en) * | 2012-06-27 | 2012-10-03 | 南京大学（苏州）高新技术研究院 | Sidelight type LED dynamic backlight display device |
| WO2012131249A2 (en) * | 2011-03-30 | 2012-10-04 | Gb Developpement | Lighting module having improved lighting uniformity |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101346729A (en) * | 2005-10-24 | 2009-01-14 | 科格内克斯科技和投资公司 | Integrated illumination assembly for symbology reader |
| CN1900794A (en) * | 2006-07-27 | 2007-01-24 | 友达光电股份有限公司 | Light emitting unit and back light module |
| CN201555153U (en) * | 2009-12-01 | 2010-08-18 | 深圳帝光电子有限公司 | Uniform high-brightness side-light type backlight source |
| WO2012131249A2 (en) * | 2011-03-30 | 2012-10-04 | Gb Developpement | Lighting module having improved lighting uniformity |
| CN102705763A (en) * | 2012-06-27 | 2012-10-03 | 南京大学（苏州）高新技术研究院 | Sidelight type LED dynamic backlight display device |
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