CN109725463A - Optical fiber light guide liquid crystal backlight module - Google Patents
Optical fiber light guide liquid crystal backlight module Download PDFInfo
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- CN109725463A CN109725463A CN201910191542.4A CN201910191542A CN109725463A CN 109725463 A CN109725463 A CN 109725463A CN 201910191542 A CN201910191542 A CN 201910191542A CN 109725463 A CN109725463 A CN 109725463A
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Abstract
The invention discloses an optical fiber light guide liquid crystal backlight module, which is characterized in that a light guide optical fiber is arranged corresponding to each sub-pixel row of a liquid crystal panel, and each sub-pixel row comprises a plurality of sub-pixels with the same color; the light guide optical fiber extends along the extending direction of the sub-pixel column; the diameter of the light guide optical fiber is equal to the width of the sub-pixel, one end of the light guide optical fiber is packaged with an LED chip, and the color of the light emitted by the LED chip is the same as the color of the sub-pixel in the sub-pixel row corresponding to the light guide optical fiber; the LED chip is any one of a red LED chip, a green LED chip or a blue LED chip. According to the optical fiber light guide liquid crystal backlight module, the LED chip is packaged at one end of the optical fiber, coupling is not needed, and the efficiency is far higher than that of other coupling methods. The number of packaged LED chips is large, but the packaged LED chips are relatively dispersed, and each LED chip has small power and is easy to dissipate heat. The whole design does not need a light guide plate and a reflector plate, and the structure is compact and simple. The backlight module has no obvious light loss and the lighting effect is far higher than that of a common backlight module.
Description
Technical field
The invention belongs to field of display technology, and in particular to a kind of optical fiber light-guiding LCD backlight mould group.
Background technique
Since liquid crystal display panel itself does not have the characteristics of luminescence, it is therefore necessary to add a light emitting source on liquid crystal display panel,
Display effect can be reached.Backlight module monomer is not a simple single spare part, but by multiple part multiple materials
The combined optical device of composition.
Presently used CCFL fluorescent tube or LED backlight do not have the characteristic of area source, it is therefore desirable to light guide plate, diffusion
The component of piece etc makes linear or point source of light light uniformly arrive entire surface, in order to allow in liquid crystal display panel entire surface not
It is identical with the luminous intensity of point, but be actually subjected to accomplish that perfect condition is extremely difficult, it can only be to try to reduce the inhomogeneities of brightness,
This has very big test to the design and craft of back light system.
Traditional backlight light source must use the optical thin film of reflectance coating, diffusion barrier etc., to reach light source average optical transmission
Purpose, but often light consume the phenomenon that will therefore and generate, root is it was found that the light emitted from traditional backlight light source
If being 100%, after the optical thin film by reflectance coating, diffusion barrier etc., the light for only having about 60% passes through backlight module
Light polarizing film is entered, liquid crystal layer is finally passed through, is only left 4% light out.
Summary of the invention
The purpose of the present invention is to provide a kind of optical fiber light-guiding LCD backlight mould group schemes, solve backlight mould in the prior art
The group technical problem that structure is complicated, light efficiency is low.
To solve the above-mentioned problems, the present invention adopts the following technical scheme:
A kind of optical fiber light-guiding LCD backlight mould group, every sub-pixel column for corresponding to liquid crystal display panel are provided with a leaded light
Optical fiber, every sub-pixel column include several sub-pixels with same color；The light-conductive optic fibre is along the extension side of sub-pixel column
To extension；The diameter of light-conductive optic fibre and the width of sub-pixel are equal, are packaged with LED chip in one end of light-conductive optic fibre, the LED core
The color that piece shines is identical as the color of sub-pixel in sub-pixel column corresponding to the light-conductive optic fibre of place；The LED chip
For any one of red LED chips, green LED chip or blue LED die.
The optical fiber light-guiding LCD backlight mould group, is encapsulated in optical fiber one end for LED chip, and without coupling, efficiency is much higher than it
His coupling process.Packaging LED chips quantity is more, but relative distribution, and each LED chip power is smaller, is easy to radiate.Whole design
Without light guide plate, reflector plate is compact-sized, simply.Without apparent light loss, light efficiency is much higher than common backlight module.Optical fiber
Design corresponding with pixel, allows LED chip to share the circuit of liquid crystal pixel, reduces circuit design.
The corresponding three sub-pixels column of three color light-conductive optic fibres, without color film, it is possible to reduce light loss 60% or so.Simultaneously because
LED light source color saturation is high, can significantly expand the display colour gamut of liquid crystal.
Further, reflection covering is enclosed on the end face at the outer peripheral surface of light-conductive optic fibre and both ends, reflection covering with
Transmission window is offered on the opposite region of sub-pixel, light can be through the corresponding sub-pixel of transmission window directive.Preferably,
The thermal coefficient for reflecting covering is greater than 200 (W/mK), light reflectivity >=90%.Specifically, reflection covering is silverskin.
Optical fiber side and both ends package reflection covering, reduce the light loss generated by refraction.It prevents in different optical fiber simultaneously
Crosstalk between coloured light improves the saturation degree and brightness of display color；Reflection covering has good heating conduction, can be effective
It radiates.
Each liquid crystal pixel is aligned with a serrated face, and non-transparent zone is corresponding without serrated face between pixel, can reduce
Light loss.
Further, the surface in the region corresponding to transmission window of light-conductive optic fibre is formed as serrated face；There is company in serrated face
Continuous symmetrical broached-tooth design.Preferably, symmetrical broached-tooth design has several sawtooth, and the apex angle of sawtooth is 90 °, and the depth of sawtooth is
The 4.5-5.5% of fibre diameter.The design of optical fiber side sawtooth is similar to the prismatic lens in backlight module, has enhancing frontal luminance
Effect, improve light utilization.
Serrated face is other than the function for the light that opens a window out, moreover it is possible to which outgoing light direction is concentrated on 70 ° of ranges of light-emitting surface normal direction
It is interior, light source can be made full use of, light loss is reduced, improves the illuminance of pixel.Since light-conductive optic fibre serrated face has prism
The effect of piece, therefore it is without the use of prismatic lens in backlight module.
To make the pixel of different location obtain uniform luminous flux, further, along the extending direction of light-conductive optic fibre, two phases
It is big compared with the area apart from the closer serrated face of LED chip apart from the farther away serrated face of LED chip in adjacent transmission window.Due to
Inside of optical fibre is strong by illumination at close to sources, and weak far from illumination at light source, therefore may be implemented often by the design of serrated face size
A transmission window luminous flux is roughly the same.The uniformity that pixel illumination is realized by changing serrated face size, in technique be compared with
It is simple.
Detailed description of the invention
Structural schematic diagram of the Fig. 1 between simple optical fiber and pixel column of the same colour.
Fig. 2 is the partial structural diagram of optical fiber light-guiding LCD backlight mould group.
Specific embodiment
For a better understanding of the present invention, the contents of the present invention are further illustrated below with reference to embodiment.
Please referring initially to Fig. 1 and Fig. 2, illustrate by taking blue led light-conductive optic fibre as an example first single light-conductive optic fibre structure and
Its relationship between corresponding blue subpixel column, the LED light-conductive optic fibre structure of other colors and the son with corresponding color
Relationship between pixel column is identical.
Fig. 1 is simple optical fiber structural schematic diagram, and the blue subpixel column 103 corresponding to liquid crystal display panel is provided with a blue
LED light-conductive optic fibre 113, every column of blue subpixels 103 include several sub-pixels with same color, which leads
Light optical fiber 113 extends along the extending direction of blue subpixel column 103, and in Fig. 1, the direction of arrow M indicates blue subpixel column
103 extending direction, i.e. blue led light-conductive optic fibre 113 extend along the direction of also arrow M.In Fig. 1, it is illustratively provided with 5
A blue subpixels, 5 blue subpixels are sequentially followed successively by the first blue subpixels 21, the second blue subpixels 22, third
Blue subpixels 23, the 4th blue subpixels 24 and the 5th blue subpixels 25.
The diameter D of blue led light-conductive optic fibre 113 with its for the width H5 of blue subpixels 103 it is equal.The blue
One end of the ontology 30 of LED light-conductive optic fibre 113 is packaged with blue LED die 1, and the color which shines is indigo plant
Color is identical as the color of sub-pixel in blue subpixels 103.
In the present embodiment, in order to guarantee the light utilization of blue led light-conductive optic fibre 113, in blue led light-conductive optic fibre
Outer peripheral surface 31 and both ends end face 32 on be enclosed with reflection covering 50, on reflection covering 50 region opposite with sub-pixel
Transmission window is offered, light can be through the corresponding sub-pixel of transmission window directive.It is each to transmit corresponding to each blue subpixels
Window is respectively the first transmission window 341, the second transmission window 342, third transmission window 343, the 4th transmission window 344 and
Five transmission windows 345 correspond respectively to the first blue subpixels 21, the second blue subpixels 22, third blue subpixels 23,
Four blue subpixels 24 and the 5th blue subpixels 25.
Covering is reflected to be made of silverskin.It is appreciated that in other embodiments, can also be made of other materials
Reflect covering, it is only necessary to the thermal coefficient for reflecting covering be made to be greater than 200 (W/mK), light reflectivity >=90%.It is set above-mentioned
It sets down, it, can also heat radiation performance while reducing light loss of the light in communication process.
The surface in the region corresponding to transmission window of blue led light-conductive optic fibre is formed as serrated face；It is right in the present embodiment
It should be respectively the first serrated face 331, the second serrated face 332, the saw of third serrated face the 333, the 4th in the serrated face of 5 transmission windows
The flank of tooth 334 and the 5th serrated face 335 correspond respectively to the first transmission window 341, the second transmission window 342, third transmission window
343, the 4th transmission window 344 and the 5th transmission window 345.
There is continuous symmetrical broached-tooth design in each serrated face, the apex angle α of sawtooth is 90 °, and the depth H 6 of sawtooth is optical fiber
The 5% of diameter D.It is appreciated that in other embodiments, the depth H 6 of sawtooth can also for fibre diameter D 4.5%,
4.8%, 5.2% or 5.4%, naturally it is also possible to other any numbers between 4.5-5.5%.
Decaying on the way is being propagated to reduce light, and is influencing the illumination uniformity to each sub-pixel, along prolonging for light-conductive optic fibre
Direction is stretched, in two adjacent transmission windows, apart from the farther away serrated face of LED chip compared with apart from the closer serrated face of LED chip
Area it is big.Referring to Fig. 1, the length H3 of third transmission window 343 is compared with the second transmission window along the extending direction of light-conductive optic fibre
342 length H2 long, length H1 long of the length H2 compared with the first transmission window 341 of the second transmission window 342, other transmission windows
Property having the same, in the present embodiment, each transmission window it is of same size.
In Fig. 2, assorted light-conductive optic fibre 110 is corresponding with the sub-pixel column of corresponding color on liquid crystal board 100, wherein red
LED light-conductive optic fibre 111 corresponds to red liquid crystal sub-pixel column 101, and green LED light-conductive optic fibre 112 corresponds to green liquid crystal picture
Plain column 102, blue led light-conductive optic fibre 113 correspond to blue liquid crystal sub-pixel column 103.Wherein, 111 envelope of red LED light-conductive optic fibre
Equipped with red LED chips, green LED light-conductive optic fibre 112 is packaged with green LED chip.
Claims (7)
1. a kind of optical fiber light-guiding LCD backlight mould group, which is characterized in that every sub-pixel column corresponding to liquid crystal display panel is respectively provided with
There is a light-conductive optic fibre, every sub-pixel column includes several sub-pixels with same color；The light-conductive optic fibre is along sub-pixel column
Extending direction extend；The diameter of light-conductive optic fibre and the width of sub-pixel are equal, are packaged with LED core in one end of light-conductive optic fibre
Piece, the color which shines are identical as the color of sub-pixel in sub-pixel column corresponding to the light-conductive optic fibre of place；Institute
Stating LED chip is any one of red LED chips, green LED chip or blue LED die.
2. optical fiber light-guiding LCD backlight mould group according to claim 1, which is characterized in that light-conductive optic fibre outer peripheral surface and
It is enclosed with reflection covering on the end face at both ends, offers transmission window, light on the reflection covering region opposite with sub-pixel
It can be through the corresponding sub-pixel of transmission window directive.
3. optical fiber light-guiding LCD backlight mould group according to claim 1, which is characterized in that the thermal coefficient for reflecting covering is big
In 200 (W/mK), light reflectivity >=90%.
4. optical fiber light-guiding LCD backlight mould group according to claim 1, which is characterized in that
Reflection covering is silverskin.
5. optical fiber light-guiding LCD backlight mould group according to claim 1-4, which is characterized in that
The surface in the region corresponding to transmission window of light-conductive optic fibre is formed as serrated face；There is continuous symmetrical sawtooth in serrated face
Structure.
6. optical fiber light-guiding LCD backlight mould group according to claim 5, which is characterized in that
Symmetrical broached-tooth design has several sawtooth, and the apex angle of sawtooth is 90 °, and the depth of sawtooth is the 4.5-5.5% of fibre diameter.
7. optical fiber light-guiding LCD backlight mould group according to claim 5, which is characterized in that
Along the extending direction of light-conductive optic fibre, in two adjacent transmission windows, apart from the farther away serrated face of LED chip compared with distance
The area of the closer serrated face of LED chip is big.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910191542.4A CN109725463A (en) | 2019-03-14 | 2019-03-14 | Optical fiber light guide liquid crystal backlight module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910191542.4A CN109725463A (en) | 2019-03-14 | 2019-03-14 | Optical fiber light guide liquid crystal backlight module |
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| CN109725463A true CN109725463A (en) | 2019-05-07 |
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| CN201910191542.4A Pending CN109725463A (en) | 2019-03-14 | 2019-03-14 | Optical fiber light guide liquid crystal backlight module |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133797A (en) * | 2019-05-30 | 2019-08-16 | 山东光韵智能科技有限公司 | A visible light three-layer wave-lined colorful optical fiber and its manufacturing method |
| CN110187435A (en) * | 2019-05-30 | 2019-08-30 | 山东光韵智能科技有限公司 | A multi-node optical fiber for long-distance lighting and its manufacturing method |
| CN114879411A (en) * | 2022-06-27 | 2022-08-09 | 深圳康佳电子科技有限公司 | Backlight module based on coreless optical fiber |
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| CN102253530A (en) * | 2011-08-12 | 2011-11-23 | 冠捷显示科技（厦门）有限公司 | Novel full-color liquid crystal display (LCD) device |
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| CN104676387A (en) * | 2015-03-24 | 2015-06-03 | 深圳市华星光电技术有限公司 | Optical fiber backlight module and liquid crystal display |
| CN205563029U (en) * | 2016-04-28 | 2016-09-07 | 广州尚丰智能科技有限公司 | Light conducting fiber liquid crystal display equipment |
| CN108490687A (en) * | 2018-03-30 | 2018-09-04 | 京东方科技集团股份有限公司 | A kind of backlight source module and display device |
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| CN101592821A (en) * | 2008-05-29 | 2009-12-02 | 北京中视中科光电技术有限公司 | a backlight |
| CN102062331A (en) * | 2010-09-30 | 2011-05-18 | 彭竞原 | Laser backlight module and liquid crystal display with same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133797A (en) * | 2019-05-30 | 2019-08-16 | 山东光韵智能科技有限公司 | A visible light three-layer wave-lined colorful optical fiber and its manufacturing method |
| CN110187435A (en) * | 2019-05-30 | 2019-08-30 | 山东光韵智能科技有限公司 | A multi-node optical fiber for long-distance lighting and its manufacturing method |
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| CN114879411A (en) * | 2022-06-27 | 2022-08-09 | 深圳康佳电子科技有限公司 | Backlight module based on coreless optical fiber |
| CN114879411B (en) * | 2022-06-27 | 2023-10-20 | 深圳康佳电子科技有限公司 | Backlight module based on coreless optical fiber |
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Application publication date: 20190507 |