CN105402640B - Backlight module - Google Patents
Backlight module Download PDFInfo
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- CN105402640B CN105402640B CN201410468628.4A CN201410468628A CN105402640B CN 105402640 B CN105402640 B CN 105402640B CN 201410468628 A CN201410468628 A CN 201410468628A CN 105402640 B CN105402640 B CN 105402640B
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Abstract
A kind of backlight module, includes an at least light emitting diode, a light guide plate, conversion medium of the same colour, a reflector plate and a yellow medium.Light emitting diode is used to send a blue light, and light guide plate has an at least incidence surface, the bottom surface for connecting incidence surface and the light-emitting surface for connecting incidence surface, and bottom surface is oppositely arranged with light-emitting surface, and light emitting diode is adjacent to incidence surface.Color conversion medium is arranged on the bang path of blue light to convert blue light into white light.Reflector plate is positioned adjacent at basal surface position and has multiple sides, and the intermediate region that reflector plate has a peripheral edge margin of adjacent side and surrounded by peripheral edge margin.Yellow medium is arranged at least part peripheral edge margin of reflector plate.Backlight module provided by the invention has improvement frame oil blackeite effect.
Description
Technical field
The present invention relates to a kind of backlight module.
Background technology
Figure 1A is the partial cutaway schematic of a known backlit module.As shown in Figure 1A, the light source of backlight module 100 is to adopt
With blue light-emitting diode 102, when backlight module 100 arranges in pairs or groups the display module design of narrow frame, because the width of glue frame 104 becomes
It is relatively narrow, some blue light IB that blue light-emitting diode 102 is sent easily reflected by 106 edge of light guide plate or reflector plate 108 and
Leak out, make the easy blue bright dizzy region 110 formed as shown in Figure 1B in four edges of backlight module 100.This frame oil blackeite
Problem significantly affects the visual experience of user.
TaiWan, China patent discloses No. TW201231856A and discloses a kind of lighting module, includes an at least light-emitting diodes
Pipe, light guide plate and colour temperature conversion medium.Colour temperature conversion medium include a fluorescence glue material and fluorescence glue material can utilize coating, printing or
Spray film mode is formed on reflector plate.Fluorescence glue material can adjust concentration or thickness distribution according to different zones, realize required colour temperature
Variation effect.TaiWan, China patent discloses No. TW201033542A and discloses a kind of backlight of light-emitting device as liquid crystal display
Illumination uses, and wherein blue light-emitting diode is arranged on the side of light guide plate, and the light-emitting surface of light guide plate is equipped with phosphor-containing piece,
Color conversion is can perform when blue light travels across phosphor-containing piece.TaiWan, China patent discloses No. TW200700834A exposure
A kind of backlight module with light guide plate, the light-emitting surface of light guide plate formed with a light-permeable ink layer, ink layer include ink with
Colour cast particle, colour cast particle is blue pigment particle or other small molecule dyes particles, for absorbing a small amount of feux rouges and green light,
Realize the control of opponent-color coordinates.TaiWan, China patent announcement the TWI335477th discloses a kind of backlight module, wherein light guide plate side
Face is equipped with pigmented reflective structure, and the light beam that light source is sent is transformed into the light beam of predetermined colour system after being reflected via pigmented reflective structure.
No. TWM417366 exposure of TaiWan, China patent announcement may be disposed at light source die gluing component in the block, and gluing component mainly wraps
Fluorescent powder, colloid, the first outer layer and the second outer layer are included, colloid is between the first outer layer, the second outer layer, and fluorescent powder is equably
It is distributed in colloid.Colloid can add quantum dot (quantum dots) material at the same time, use adjustment light penetration frequency spectrum.
The content of the invention
The present invention provides a kind of backlight module for having and improving frame oil blackeite effect.
Other objects and advantages of the present invention can from disclosed herein technical characteristic in be further understood.
It is to realize one of above-mentioned or part or all of purpose or other purposes, one embodiment of the invention provides a kind of back of the body
Optical module includes an at least light emitting diode, a light guide plate, conversion medium of the same colour, a reflector plate and a yellow medium.Shine
Diode is used to send a blue light, and light guide plate has an at least incidence surface, the bottom surface for connecting incidence surface and connection incidence surface
A light-emitting surface, bottom surface is oppositely arranged with light-emitting surface, and light emitting diode is adjacent to incidence surface.Color conversion medium is arranged at blue light
To convert blue light into white light on bang path.Reflector plate is positioned adjacent at basal surface position and has multiple sides, and reflects
The intermediate region that piece has a peripheral edge margin of adjacent side and surrounded by peripheral edge margin.Yellow medium is arranged at reflector plate
At least part peripheral edge margin.
In one embodiment, the peripheral edge margin of reflector plate, which can cover by each side, inside contracts one centimeter of model towards intermediate region
Enclose.
In one embodiment, yellow medium can be yellow adhesive tape, and yellow adhesive tape can have in the diverse location of peripheral edge margin
There is different thickness.
In one embodiment, yellow medium can be Yellow ink, and Yellow ink can have in the diverse location of peripheral edge margin
There is different concentration.
In one embodiment, color conversion medium can include fluorescent material or quanta point material, and color conversion medium can be set
In on the light-emitting surface of light guide plate.
In one embodiment, color conversion medium can include a quanta point material piece, and quanta point material piece is stacked and placed on light guide plate
Light-emitting surface on to convert blue light into white light, and quanta point material piece has at least a side.
In one embodiment, at least an optical diaphragm is arranged on light guide plate, and quanta point material piece can be located at optical film
Between piece and light guide plate.
In one embodiment, the side of the peripheral edge margin overlapping quantum dot material piece of reflector plate.
It is up to one of above-mentioned or part or all of purpose or other purposes, another embodiment of the present invention provides a kind of back of the body
Optical module, includes an at least light emitting diode, a light guide plate, conversion medium of the same colour, a reflector plate and a yellow medium.Shine
Diode is used to send a blue light, and light guide plate has an at least incidence surface, and connects incidence surface and the bottom surface being oppositely arranged
And a light-emitting surface, and light emitting diode is adjacent to incidence surface.Color conversion medium is arranged on the bang path of blue light so that blue light to be turned
It is changed to white light.Reflector plate is positioned adjacent at basal surface position, and the position of reflector plate substantially overlaps light guide plate, and reflector plate has extremely
One intermediate region of few a side, a peripheral edge margin of adjacent side and adjacent peripheral edge margin.Yellow medium is arranged at reflection
At least part peripheral edge margin of piece.
By the design of above-mentioned each embodiment, because yellow medium is distributed with the peripheral edge margin of reflector plate, work as light guide plate
The blue bright dizzy region (because blue light leak causes) of periphery and the yellow area (by setting yellow medium to be formed) of reflector plate that
When this is overlapping, it can make one to arrive white soon by the color blending effect of blueness and yellow, can so improve or avoid blue light leak from leading
Cause the effect of frame oil blackeite.Furthermore yellow medium can have difference in the diverse location of reflector plate peripheral edge margin or different sections
Distribution mode, so can make the color blending effect of whole peripheral edge margin evenly.In addition, if backlight module is by quantum dot material
Tablet converts blue light into white light, is formed since quanta point material piece is usually cut by a larger-size master slice, therefore quantum dot
Material piece surrounding cut side easily by aqueous vapor influenced to make the periphery of quanta point material piece formed can not carry out light conversion or
The low failure area of light conversion efficiency, causes the phenomenon of surrounding oil blackeite.Yellow matchmaker is distributed in reflector plate periphery by above-described embodiment
The design of Jie, can equally provide color blending effect and form white light, to improve because the failure of quanta point material piece periphery causes frame oil blackeite
Phenomenon.
Other objects and advantages of the present invention can from disclosed herein technical characteristic in be further understood.
For above and other objects of the present invention, feature and advantage can be become apparent, special embodiment below simultaneously coordinates attached drawing, makees
Describe in detail as follows.
Brief description of the drawings
Figure 1A is the partial cutaway schematic of a known backlit module.
Figure 1B is a schematic diagram, shows the distribution in the blue bright dizzy region of known design.
Fig. 2 is the partial cutaway schematic of the backlight module of one embodiment of the invention.
Fig. 3 is that display yellow medium is in the schematic diagram of the distribution mode of reflector plate periphery according to one embodiment of the invention.
Fig. 4 is that display yellow medium is in the schematic diagram of the distribution mode of reflector plate periphery according to another embodiment of the present invention.
Fig. 5 is according to another embodiment of the present invention, and display quantum dot material piece is shown in the distribution mode of reflector plate periphery
It is intended to.
Fig. 6 is according to another embodiment of the present invention, and display quantum dot material piece is shown in the distribution mode of reflector plate periphery
It is intended to.
Embodiment
For the present invention foregoing and other technology contents, feature and effects, it is following cooperation attached drawing embodiment it is detailed
Describe in detail it is bright in, can clearly present.The direction term being previously mentioned in following embodiments, such as：It is upper and lower, left and right, front or rear
Deng, be only refer to the attached drawing direction.Therefore, the direction term used is intended to be illustrative and not intended to limit the present invention.
Fig. 2 is the partial cutaway schematic of the backlight module of one embodiment of the invention.A kind of as shown in Fig. 2, backlight module
10 include an at least light emitting diode 12, light guide plate 14, conversion medium of the same colour 16, a reflector plate 18 and a yellow medium 22.
Light guide plate 14 has a light extraction of an at least incidence surface 14a, a bottom surface 14b of connection incidence surface 14a and connection incidence surface 14a
Face 14c, and bottom surface 14b and light-emitting surface 14c is oppositely arranged.Light emitting diode 12 is adjacent to incidence surface 14a and sends a blue light IB.Color
Conversion medium 16 is arranged on the bang path of blue light IB so that blue light IB is converted to white light IW.In one embodiment, color is changed
Medium 16 may be, for example, fluorescent material or quanta point material, and for example be disposed on the light-emitting surface 14a of light guide plate 14.It is real one
Apply in example, color conversion medium 16 may be, for example, a quanta point material piece (Quantum Dot Films, QDEF) 16a or a fluorescence
Layer 16b, quanta point material piece 16a or fluorescence coating 16b can be stacked or be formed on the light-emitting surface 14c of light guide plate 14 with by blue light IB
Be converted to white light IW.In the present embodiment, backlight module 10 is also comprising an at least optical diaphragm (such as diffusion sheet 32, blast piece
34), optical diaphragm is arranged on light guide plate 14, and color conversion medium 16 can be located at optical diaphragm (such as diffusion sheet 32, blast piece
34) between light guide plate 14 but do not limit.Reflector plate 18 may be disposed between backboard 42 and light guide plate 14 and neighbouring light guide plate bottom
At the 14b positions of face, reflector plate 18 has at least a side and distributing position can substantially overlap light guide plate 14.
As shown in figure 3, reflector plate 18 can for example correspond to 14 external form of light guide plate and have multiple sides 181, reflector plate 18 has
The intermediate region for having the peripheral edge margin 18a and adjacent peripheral edge margin 18a of adjacent side 181 and being surrounded by peripheral edge margin 18a
18b.In one embodiment, peripheral edge margin 18a can for example cover by each side 181 towards intermediate region 18b inside contract one centimeter away from
From scope (distance d=1cm), but do not limit.Yellow medium 22 is arranged at least part of peripheral edge margin 18a so that human eye 36
Yellow light IY is perceived, yellow medium 22 does not limit in the set-up mode on reflector plate 18, may be, for example, and be attached at reflector plate 18 weeks
The yellow adhesive tape of edge region 18a or the Yellow ink for being formed at 18 peripheral edge margin 18a of reflector plate.Fig. 2 is refer again to, is implemented one
In example, when the narrower width of glue frame 44, some blue light IB that light emitting diode 12 is sent easily is leaked by the edge of backlight module 10
Go out, however, because yellow medium 22 is distributed with the peripheral edge margin 18a of the reflector plate 18 of the present embodiment, when 14 periphery of light guide plate
The yellow area (by setting yellow medium 22 to be formed) of the bright dizzy region (because blue light IB light leaks cause) of blueness and reflector plate 18 that
When this is overlapping, by the color blending effect of blueness and yellow human eye 36 can be made to see white, can so improve or avoid blue light leak
Cause the effect of frame oil blackeite.In one embodiment, using the design for attaching yellow adhesive tape, the script phase of backlight module 10 can be made
To central point, partially blue chromaticity coordinates 0.34-0.39 is changed to partially white chromaticity coordinates 0.41-0.42, that is, the design of above-described embodiment
Really can obtain and allow blueness and the light of yellow while enter human eye 36, generation mixed color effect and human eye is felt the effect to bleach
Fruit.
In general, the blue light IB of the incidence surface 14a of close light guide plate 14 is relatively by force and apart from the incidence surface 14a of light guide plate 14
Local blue light IB farther out is weaker.Therefore, please refer to Fig.4, in one embodiment, yellow medium 22 is in 18 peripheral edge margin of reflector plate
The diverse location of 18a or different sections can have different distribution modes.For example, as shown in figure 4, closer incidence surface
The section P of 14a be able to can so make whole with deeper yellow further away from the section Q of incidence surface 14a with shallower yellow
The color blending effect of a peripheral edge margin 18a is evenly.Certainly, the mode for adjusting the yellow depth does not limit, such as when yellow medium
22 when being yellow adhesive tape, can have relatively thick tape thickness in section P, that is, the tape thickness of section P is more than section Q's
Tape thickness.When yellow medium 22 is Yellow ink, there can be a relatively dense printing ink concentration in section P, that is, section P
Printing ink concentration is more than the printing ink concentration of section Q.
Furthermore if backlight module 10 is that blue light IB is converted into white light IW by quantum dot material piece 16a, due to quantum dot
Material piece 16a is usually cut by a larger-size master slice and formed, thus quanta point material piece 16a surroundings cut side easily by
The influence of aqueous vapor, which forms the periphery of quanta point material piece 16a, can not carry out light conversion or the low failure area of light conversion efficiency, make
Into the phenomenon of surrounding oil blackeite.Therefore, setting for yellow medium 22 is distributed in 18 peripheral edge margin 18a of reflector plate by above-described embodiment
Meter, can equally provide color blending effect and form white light, to improve because the failure of quanta point material piece 16a peripheries causes showing for frame oil blackeite
As.
In one embodiment, quanta point material piece 16a has at least a side and distributing position can substantially overlap light guide plate
14 with reflector plate 18.Fig. 5 is refer to, in one embodiment, quanta point material piece 16a can for example correspond to 14 external form of light guide plate and have
There are multiple sides 161.The side 161 of the peripheral edge margin 18a overlapping quantum dot material pieces 16a of reflector plate 18.In one embodiment,
The area of quanta point material piece 16a is less than the area of reflector plate 18, so the side 161 of quanta point material piece 16a is positioned at reflection
It is in the peripheral edge margin 18a of piece 18 and misaligned with the side 181 of reflector plate 18, and the side 161 of quanta point material piece 16a is located at
In yellow medium 22.In addition, Fig. 6 is refer to, and in one embodiment, the area of quanta point material piece 16a and the face of reflector plate 18
Product is roughly equal, so the side 161 of quanta point material piece 16a is located in the peripheral edge margin 18a of reflector plate 18, and quantum dot material
The side 161 of tablet 16a is completely superposed with the side 181 of reflector plate 18.
In conclusion the embodiment of the present invention at least has the advantages that following one of, pass through above-mentioned each embodiment
Design, because yellow medium is distributed with the peripheral edge margin of reflector plate, when the blue bright dizzy region of light guide plate periphery is (because of blue light leak
Cause) when overlapping each other with the yellow area of reflector plate (by setting yellow medium to be formed), pass through the colour mixture of blueness and yellow
Effect can make one to arrive white soon, the effect that can so improve or avoid blue light leak from causing frame oil blackeite.Furthermore yellow medium
There can be different distribution modes in the diverse location of reflector plate peripheral edge margin or different sections, can so make whole peripheral edge margin
Color blending effect evenly.In addition, if backlight module is to convert blue light into white light by quantum dot material piece, due to quantum dot
Material piece is usually cut by a larger-size master slice and formed, therefore quanta point material piece surrounding cuts side easily by aqueous vapor
Influencing, which forms the periphery of quanta point material piece, can not carry out light conversion or the low failure area of light conversion efficiency, cause surrounding oil blackeite
Phenomenon.By above-described embodiment in reflector plate periphery be distributed yellow medium design, can equally provide color blending effect formed it is white
Light, to improve because the failure of quanta point material piece periphery causes the phenomenon of frame oil blackeite.
The above, is merely a preferred embodiment of the present invention, it is impossible to the scope of the invention implemented is limited with this, i.e., it is all
It is the simple equivalence changes and modification that claims and description are made according to the present invention, all still falls within of the invention special
The scope of profit covering.In addition, the present invention any embodiment or claim be not necessary to realize disclosed herein whole purposes
Or advantage or feature.It is used in addition, summary part and denomination of invention are intended merely to auxiliary patent document retrieval, is not used for limiting
The interest field of the present invention.
Symbol description
10 backlight modules
12 light emitting diodes
14 light guide plates
14a incidence surfaces
14b bottom surfaces
14c light-emitting surfaces
16 color conversion mediums
161 sides
16a quanta point material pieces
16b fluorescence coatings
18 reflector plates
181 sides
18a peripheral edge margins
18b intermediate regions
22 yellow media
32 diffusion sheets
34 blast pieces
36 human eyes
42 backboards
44 glue frames
100 backlight modules
102 blue light-emitting diodes
104 glue frames
106 light guide plates
108 reflector plates
The 110 bright dizzy regions of blueness
D distances
P, Q sections
IB blue lights
IW white lights
IY yellow lights
Claims (14)
1. a kind of backlight module, includes an at least light emitting diode, a light guide plate, conversion medium of the same colour, a reflector plate and one
Yellow medium, wherein
An at least light emitting diode is used to send a blue light,
The light guide plate has the one of an at least incidence surface, a bottom surface of the connection incidence surface and the connection incidence surface to go out
Smooth surface, the bottom surface are oppositely arranged with the light-emitting surface, and the light emitting diode is adjacent to the incidence surface,
The color conversion medium is arranged at the blue light is converted to white light on the bang path of the blue light,
The reflector plate is positioned adjacent at the basal surface position and has multiple sides, wherein the reflector plate, which has, abuts this
One peripheral edge margin of a little sides and the intermediate region surrounded by the peripheral edge margin,
The yellow medium is between the light guide plate and the reflector plate and is arranged at least partly peripheral edge margin, institute
State yellow medium and include yellow adhesive tape or Yellow ink, and the yellow medium will not change the wavelength of the blue light.
2. backlight module as claimed in claim 1, it is characterised in that the peripheral edge margin covers by each side towards described
Intermediate region inside contracts one centimeter of scope.
3. backlight module as claimed in claim 1, it is characterised in that the yellow adhesive tape is in the different positions of the peripheral edge margin
Put with different thickness.
4. backlight module as claimed in claim 1, it is characterised in that the Yellow ink is in the different positions of the peripheral edge margin
Put with different concentration.
5. backlight module as claimed in claim 1, it is characterised in that the color conversion medium includes fluorescent material or quantum dot
Material.
6. backlight module as claimed in claim 1, it is characterised in that the color conversion medium is arranged at the institute of the light guide plate
State on light-emitting surface.
7. backlight module as claimed in claim 1, it is characterised in that the color conversion medium includes
One quanta point material piece, is stacked and placed on the blue light is converted to white light on the light-emitting surface of the light guide plate, wherein
The quanta point material piece has at least a side.
8. backlight module as claimed in claim 7, it is characterised in that the peripheral edge margin covers by each side towards described
Intermediate region inside contracts one centimeter of scope.
9. backlight module as claimed in claim 7, it is characterised in that the yellow adhesive tape is in the different positions of the peripheral edge margin
Put with different thickness.
10. backlight module as claimed in claim 7, it is characterised in that the Yellow ink is in the different positions of the peripheral edge margin
Put with different concentration.
11. backlight module as claimed in claim 7, it is characterised in that also include：
An at least optical diaphragm, is arranged on the light guide plate, and the quanta point material piece is located at the optical diaphragm and institute
State between light guide plate.
12. backlight module as claimed in claim 7, it is characterised in that the peripheral edge margin of the reflector plate overlaps the amount
The side of son point material piece.
13. a kind of backlight module, includes an at least light emitting diode, a light guide plate, conversion medium of the same colour, a reflector plate and one
Yellow medium, wherein
An at least light emitting diode is used to send a blue light,
The light guide plate has an at least incidence surface, and the connection incidence surface and the bottom surface being oppositely arranged and a light extraction
Face, and the light emitting diode is adjacent to the incidence surface,
The color conversion medium is arranged at the blue light is converted to white light on the bang path of the blue light,
The reflector plate is positioned adjacent at the basal surface position and the position of the reflector plate overlaps the light guide plate, wherein institute
Stating reflector plate has a middle area of at least a side, a peripheral edge margin of the adjacent side and the adjacent peripheral edge margin
Domain,
The yellow medium is between the light guide plate and the reflector plate and is arranged at least partly peripheral edge margin, institute
State yellow medium and include yellow adhesive tape or Yellow ink, and the yellow medium will not change the wavelength of the blue light.
14. backlight module as claimed in claim 13, it is characterised in that the color conversion medium is arranged at the light guide plate
On the light-emitting surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410468628.4A CN105402640B (en) | 2014-09-15 | 2014-09-15 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410468628.4A CN105402640B (en) | 2014-09-15 | 2014-09-15 | Backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105402640A CN105402640A (en) | 2016-03-16 |
| CN105402640B true CN105402640B (en) | 2018-04-24 |
Family
ID=55468297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410468628.4A Active CN105402640B (en) | 2014-09-15 | 2014-09-15 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105402640B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759504B (en) * | 2016-05-12 | 2019-06-28 | 青岛海信电器股份有限公司 | Backlight module and liquid crystal display device |
| JP6715946B2 (en) | 2016-11-07 | 2020-07-01 | 富士フイルム株式会社 | Film containing light absorber and backlight unit |
| CN106526963A (en) * | 2016-11-30 | 2017-03-22 | 厦门天马微电子有限公司 | Liquid crystal display device |
| CN107608136B (en) * | 2017-10-12 | 2020-12-04 | 海信视像科技股份有限公司 | Backlight module and display device |
| CN208041696U (en) | 2018-04-16 | 2018-11-02 | 京东方科技集团股份有限公司 | Backlight, backlight module and display device |
| CN110262130B (en) * | 2018-11-26 | 2021-12-21 | 友达光电股份有限公司 | Backlight module |
| CN112147813B (en) * | 2019-06-26 | 2024-03-19 | 中强光电股份有限公司 | Light source module and display device |
| CN112578591A (en) * | 2019-09-29 | 2021-03-30 | 高创(苏州)电子有限公司 | Reflector plate and backlight module |
| US20230408868A1 (en) * | 2020-11-17 | 2023-12-21 | K-Tronics (Suzhou) Technology Co., Ltd. | Backlight module and display device |
| CN112363351B (en) * | 2020-11-24 | 2023-06-20 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN114326205A (en) * | 2021-12-07 | 2022-04-12 | 广东中强精英电子科技有限公司 | Backlight module and display device |
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| TWI428672B (en) * | 2010-10-15 | 2014-03-01 | Young Lighting Technology Corp | Backlight module |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105402640A (en) | 2016-03-16 |
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