CN105402640A - Backlight module - Google Patents
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- CN105402640A CN105402640A CN201410468628.4A CN201410468628A CN105402640A CN 105402640 A CN105402640 A CN 105402640A CN 201410468628 A CN201410468628 A CN 201410468628A CN 105402640 A CN105402640 A CN 105402640A
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Abstract
The invention discloses a backlight module. The backlight module comprises at least one light emitting diode, a light guide plate, a color conversion medium, a reflector plate and a yellow medium. The light emitting diodes are used for emitting blue light. The light guide plate is provided with at least one light inlet face, a bottom face connected with the light inlet faces and a light outlet face connected with the light inlet faces. The bottom face and the light outlet face are oppositely arranged, and the light emitting diodes are close to the light inlet faces. The color conversion medium is arranged on the transmission path of the blue light so as to convert the blue light into white light. The reflector plate is arranged in the position close to the bottom face and provided with a plurality of side edges. In addition, the reflector plate is provided with a peripheral area adjacent to the side edges and a middle area surrounded by the peripheral area. The yellow medium is arranged in at least part of the peripheral area of the reflector plate. The backlight module is capable of improving the frame bluing 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 adopts blue light-emitting diode 102, when backlight module 100 arrange in pairs or groups narrow frame display module design time, width because of glue frame 104 becomes narrower, the some blue light IB that blue light-emitting diode 102 sends easily is reflected by light guide plate 106 edge or reflector plate 108 and spills, and makes four of backlight module 100 edges easily form the bright dizzy region 110 of blueness as shown in Figure 1B.This frame oil blackeite problem obviously affects the visual experience of user.
TaiWan, China patent discloses No. TW201231856A and discloses a kind of lighting module, comprises at least one light emitting diode, light guide plate and colour temperature conversion medium.Colour temperature conversion medium comprises a fluorescent glue material and fluorescent glue material can utilize coating, printing or spray film mode to be formed on reflector plate.Fluorescent glue material can adjust concentration or thickness distribution according to zones of different, the colour temperature variation effect needed for realization.TaiWan, China patent discloses No. TW201033542A and discloses a kind of light-emitting device and use as the back lighting of liquid crystal display, wherein blue light-emitting diode is arranged on the side of light guide plate, and the exiting surface of light guide plate is provided with phosphor-containing sheet, color conversion can be performed when blue light travels across phosphor-containing sheet.TaiWan, China patent discloses No. TW200700834A and discloses a kind of backlight module with light guide plate, the exiting surface of light guide plate is formed with a light-permeable ink layer, ink layer comprises ink and colour cast particle, colour cast particle is blue pigment particle or other small molecule dyes particle, for absorbing a small amount of ruddiness and green glow, realize the control of opponent-color coordinates.No. TWI335477th, TaiWan, China patent announcement discloses a kind of backlight module, and wherein light guide plate side is provided with pigmented reflective structure, and the light beam that light source sends is via the light beam being transformed into predetermined colour system after pigmented reflective structure reflects.TaiWan, China patent announcement TWM417366 exposure can be arranged at the gluing component in light source module, gluing component mainly comprises fluorescent material, colloid, first outer and the second skin, colloid is between the first skin, the second skin, and fluorescent material is evenly distributed in colloid.Colloid can add quantum dot (quantumdots) material simultaneously, uses adjustment light penetration frequency spectrum.
Summary of the invention
The invention provides and a kind of there is the backlight module improving frame oil blackeite effect.
Other object of the present invention and advantage can be further understood from the technical characteristic disclosed by the present invention.
For realizing one of above-mentioned or partly or entirely object or other object, one embodiment of the invention provide a kind of backlight module to comprise at least one 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 for sending a blue light, and light guide plate has at least one incidence surface, connects a bottom surface of incidence surface and connects an exiting surface of incidence surface, and bottom surface and exiting surface are oppositely arranged, and the contiguous incidence surface of light emitting diode.So that blue light is converted to white light on the bang path that look conversion medium is arranged at blue light.Reflector plate is arranged at adjacent floor position and has multiple side, and reflector plate have adjacent side a peripheral edge margin and by peripheral edge margin around a zone line.Yellow medium is arranged at least part of peripheral edge margin of reflector plate.
In one embodiment, the peripheral edge margin of reflector plate can contain the scope being inside contracted a centimeter by each side towards zone line.
In one embodiment, yellow medium can be yellow adhesive tape, and yellow adhesive tape can have different thickness at the diverse location of peripheral edge margin.
In one embodiment, yellow medium can be Yellow ink, and Yellow ink can have different concentration at the diverse location of peripheral edge margin.
In one embodiment, look conversion medium can comprise fluorescent material or quanta point material, and look conversion medium can be arranged on the exiting surface of light guide plate.
In one embodiment, look conversion medium can comprise a quanta point material sheet, and so that blue light is converted to white light on the exiting surface that quanta point material sheet is stacked and placed on light guide plate, and quanta point material sheet has at least one side.
In one embodiment, at least one blooming piece is arranged on light guide plate, and quanta point material sheet can between blooming piece and light guide plate.
In one embodiment, the side of the superimposed quantum dot material piece of the peripheral edge margin of reflector plate.
For reaching one of above-mentioned or partly or entirely object or other object, another embodiment of the present invention provides a kind of backlight module, comprises at least one 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 for sending a blue light, and light guide plate has at least one incidence surface, and connects incidence surface and the bottom surface be oppositely arranged and an exiting surface, and the contiguous incidence surface of light emitting diode.So that blue light is converted to white light on the bang path that look conversion medium is arranged at blue light.Reflector plate is arranged at adjacent floor position, the position essence coincidence light guide plate of reflector plate, and reflector plate has at least one side, an adjacent peripheral edge margin of side and a zone line of adjacent peripheral edge margin.Yellow medium is arranged at least part of peripheral edge margin of reflector plate.
By the design of each embodiment above-mentioned, because the peripheral edge margin of reflector plate is distributed with yellow medium, when the bright dizzy region of blueness (because blue light leak causes) of light guide plate periphery overlaps each other with the yellow area (being formed by arranging yellow medium) of reflector plate, human eye can be made by blue to see white with yellow color blending effect, so can improve or avoid blue light leak to cause the effect of frame oil blackeite.Moreover yellow medium can have different distribution modes in the diverse location of reflector plate peripheral edge margin or different section, so can make the color blending effect of whole peripheral edge margin evenly.In addition, if backlight module converts blue light to white light by quantum dot material piece, form because quanta point material sheet is cut by a larger-size master slice usually, therefore the side that cuts of quanta point material sheet surrounding easily makes the periphery of quanta point material sheet be formed cannot to carry out light conversion or the low inefficacy district of light conversion efficiency by the impact of aqueous vapor, causes the phenomenon of surrounding oil blackeite.Distributed in reflector plate periphery by above-described embodiment the design of yellow medium, and color blending effect can be provided equally to form white light, caused the phenomenon of frame oil blackeite to improve because quanta point material sheet periphery loses efficacy.
Other object of the present invention and advantage can be further understood from the technical characteristic disclosed by the present invention.For above and other objects of the present invention, feature and advantage can be become apparent, special embodiment below also coordinates accompanying drawing, is described in detail below.
Accompanying drawing explanation
Figure 1A is the partial cutaway schematic of a known backlit module.
Figure 1B is a schematic diagram, the distribution in the bright dizzy region of blueness of display known design.
Fig. 2 is the partial cutaway schematic of the backlight module of one embodiment of the invention.
Fig. 3 is according to one embodiment of the invention, shows yellow medium in the schematic diagram of the distribution mode of reflector plate periphery.
Fig. 4 is according to another embodiment of the present invention, shows yellow medium in the schematic diagram of the distribution mode of reflector plate periphery.
Fig. 5 is according to another embodiment of the present invention, and display quantum dot material piece is in the schematic diagram of the distribution mode of reflector plate periphery.
Fig. 6 is according to another embodiment of the present invention, and display quantum dot material piece is in the schematic diagram of the distribution mode of reflector plate periphery.
Detailed description of the invention
Aforementioned and other technology contents, feature and effect for the present invention, in the detailed description of the embodiment of following cooperation accompanying drawing, can clearly present.The direction term mentioned in following examples such as: upper and lower, left and right, front or rear etc., is only the direction with reference to accompanying drawing.Therefore, the direction term of use is used to illustrate and is not used for limiting the present invention.
Fig. 2 is the partial cutaway schematic of the backlight module of one embodiment of the invention.As shown in Figure 2, a kind of backlight module 10 comprises at least one light emitting diode 12, light guide plate 14, conversion medium of the same colour 16, reflector plate 18 and a yellow medium 22.Light guide plate 14 has at least one incidence surface 14a, connects a bottom surface 14b of incidence surface 14a and connects an exiting surface 14c of incidence surface 14a, and bottom surface 14b and exiting surface 14c is oppositely arranged.Light emitting diode 12 is close to incidence surface 14a and sends a blue light IB.So that blue light IB is converted to white light IW on the bang path that look conversion medium 16 is arranged at blue light IB.In one embodiment, look conversion medium 16 such as can be fluorescent material or quanta point material, and is such as be arranged on the exiting surface 14a of light guide plate 14.In one embodiment, look conversion medium 16 such as can be a quanta point material sheet (QuantumDotFilms, QDEF) 16a or a fluorescence coating 16b, quanta point material sheet 16a or fluorescence coating 16b can stacked or be formed at light guide plate 14 exiting surface 14c on so that blue light IB is converted to white light IW.In the present embodiment, backlight module 10 also comprises at least one blooming piece (such as diffusion sheet 32, blast sheet 34), blooming piece is arranged on light guide plate 14, and look conversion medium 16 can be positioned between blooming piece (such as diffusion sheet 32, blast sheet 34) and light guide plate 14 but not to limit.Reflector plate 18 can be arranged between backboard 42 and light guide plate 14 and contiguous bottom surface of light guide plate 14b position, and reflector plate 18 has at least one side and distributing position can essence coincidence light guide plate 14.
As shown in Figure 3, reflector plate 18 such as may correspond to light guide plate 14 external form and has multiple side 181, reflector plate 18 there is a peripheral edge margin 18a of adjacent side 181 and adjacent peripheral edge margin 18a and by peripheral edge margin 18a around a zone line 18b.In one embodiment, peripheral edge margin 18a such as can contain the scope (distance d=1cm) being inside contracted one centimeter of distance by each side 181 towards zone line 18b, but does not limit.Yellow medium 22 is arranged at least part of peripheral edge margin 18a to make human eye 36 perception gold-tinted IY, the set-up mode of yellow medium 22 on reflector plate 18 does not limit, such as, can be the yellow adhesive tape being attached at reflector plate 18 peripheral edge margin 18a or the Yellow ink being formed at reflector plate 18 peripheral edge margin 18a.Refer again to Fig. 2, in one embodiment, when the width of glue frame 44 is narrower, the some blue light IB that light emitting diode 12 sends easily is spilt by the edge of backlight module 10, but, because the peripheral edge margin 18a of the reflector plate of the present embodiment 18 is distributed with yellow medium 22, when the bright dizzy region of blueness (because blue light IB light leak causes) of light guide plate 14 periphery overlaps each other with the yellow area (being formed by arranging yellow medium 22) of reflector plate 18, human eye 36 can be made by blue to see white with yellow color blending effect, so can improve or avoid blue light leak to cause the effect of frame oil blackeite.In one embodiment, utilize the design attaching yellow adhesive tape, the partially blue chromaticity coordinates 0.34-0.39 of the script relative centre point of backlight module 10 can be made to be changed to partially white chromaticity coordinates 0.41-0.42, that is the design of above-described embodiment really can obtain to allow and blue enters human eye 36 with yellow light simultaneously, produce mixed color effect and effect that human eye perceives is bleached.
Generally speaking, more weak near the local blue light IB that the blue light IB of the incidence surface 14a of light guide plate 14 is comparatively strong and far away apart from the incidence surface 14a of light guide plate 14.Therefore, please refer to Fig. 4, in one embodiment, yellow medium 22 can have different distribution modes in the diverse location of reflector plate 18 peripheral edge margin 18a or different section.For example, as shown in Figure 4, the section P of closer incidence surface 14a can have darker yellow and can have more shallow yellow compared with the section Q away from incidence surface 14a, so can make the color blending effect of whole peripheral edge margin 18a evenly.Certainly, the mode adjusting the yellow depth does not limit, and such as, when yellow medium 22 is yellow adhesive tape, can have relatively thick tape thickness, that is the tape thickness of section P is greater than the tape thickness of section Q in section P.When yellow medium 22 is Yellow ink, relatively dense printing ink concentration can be had in section P, that is the printing ink concentration of section P is greater than the printing ink concentration of section Q.
Moreover, if backlight module 10 converts blue light IB to white light IW by quantum dot material piece 16a, form because quanta point material sheet 16a is cut by a larger-size master slice usually, therefore the side that cuts of quanta point material sheet 16a surrounding easily makes the periphery of quanta point material sheet 16a be formed cannot to carry out light conversion or the low inefficacy district of light conversion efficiency by the impact of aqueous vapor, causes the phenomenon of surrounding oil blackeite.Therefore, the design of the yellow medium 22 that distributed at reflector plate 18 peripheral edge margin 18a by above-described embodiment, can provide color blending effect to form white light equally, causes the phenomenon of frame oil blackeite to improve because quanta point material sheet 16a periphery loses efficacy.
In one embodiment, quanta point material sheet 16a has at least one side and distributing position can essence coincidence light guide plate 14 and reflector plate 18.Please refer to Fig. 5, in one embodiment, quanta point material sheet 16a such as may correspond to light guide plate 14 external form and has multiple side 161.The side 161 of the superimposed quantum dot material piece 16a of peripheral edge margin 18a of reflector plate 18.In one embodiment, the area of quanta point material sheet 16a is less than the area of reflector plate 18, so the side 161 of quanta point material sheet 16a is positioned at the peripheral edge margin 18a of reflector plate 18 and does not overlap with the side 181 of reflector plate 18, and the side 161 of quanta point material sheet 16a is positioned at yellow medium 22.In addition, please refer to Fig. 6, in one embodiment, the area of quanta point material sheet 16a and the area of reflector plate 18 roughly equal, so the side 161 of quanta point material sheet 16a is positioned at the peripheral edge margin 18a of reflector plate 18, and the side 161 of quanta point material sheet 16a overlaps completely with the side 181 of reflector plate 18.
In sum, embodiments of the invention at least have one of them advantage following, by the design of each embodiment above-mentioned, because the peripheral edge margin of reflector plate is distributed with yellow medium, when the bright dizzy region of blueness (because blue light leak causes) of light guide plate periphery overlaps each other with the yellow area (being formed by arranging yellow medium) of reflector plate, human eye can be made by blue to see white with yellow color blending effect, so can improve or avoid blue light leak to cause the effect of frame oil blackeite.Moreover yellow medium can have different distribution modes in the diverse location of reflector plate peripheral edge margin or different section, so can make the color blending effect of whole peripheral edge margin evenly.In addition, if backlight module converts blue light to white light by quantum dot material piece, form because quanta point material sheet is cut by a larger-size master slice usually, therefore the side that cuts of quanta point material sheet surrounding easily makes the periphery of quanta point material sheet be formed cannot to carry out light conversion or the low inefficacy district of light conversion efficiency by the impact of aqueous vapor, causes the phenomenon of surrounding oil blackeite.Distributed in reflector plate periphery by above-described embodiment the design of yellow medium, and color blending effect can be provided equally to form white light, caused the phenomenon of frame oil blackeite to improve because quanta point material sheet periphery loses efficacy.
The above, be only the preferred embodiments of the present invention, can not limit scope of the invention process with this, namely every simple equivalence done according to claims of the present invention and description changes and amendment, all still belongs to the scope that patent of the present invention covers.In addition, any embodiment of the present invention or claim must not realize whole object disclosed by the present invention or advantage or feature.In addition, summary part and denomination of invention are only used to the use of auxiliary patent document retrieval, are not used for limiting interest field of the present invention.
Symbol description
10 backlight modules
12 light emitting diodes
14 light guide plates
14a incidence surface
14b bottom surface
14c exiting surface
16 look conversion medium
161 sides
16a quanta point material sheet
16b fluorescence coating
18 reflector plates
181 sides
18a peripheral edge margin
18b zone line
22 yellow media
32 diffusion sheets
34 blast sheets
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
110 blue bright dizzy regions
D distance
P, Q section
IB blue light
IW white light
IY gold-tinted
Claims (18)
1. a backlight module, comprises at least one light emitting diode, a light guide plate, conversion medium of the same colour, a reflector plate and a yellow medium, wherein
Described at least one light emitting diode is used for sending a blue light,
Described light guide plate has at least one incidence surface, connects a bottom surface of described incidence surface and connects an exiting surface of described incidence surface, and described bottom surface and described exiting surface are oppositely arranged, and the contiguous described incidence surface of described light emitting diode,
So that described blue light is converted to white light on the bang path that described look conversion medium is arranged at described blue light,
Described reflector plate is arranged at contiguous described basal surface position place and has multiple side, wherein said reflector plate have these sides adjacent a peripheral edge margin and by described peripheral edge margin around a zone line,
Described yellow medium is arranged at least part of described peripheral edge margin.
2. backlight module as claimed in claim 1, is characterized in that described peripheral edge margin contains the scope being inside contracted a centimeter by each described side towards described zone line.
3. backlight module as claimed in claim 1, is characterized in that described yellow medium is yellow adhesive tape.
4. backlight module as claimed in claim 3, is characterized in that described yellow adhesive tape has different thickness in the diverse location of described peripheral edge margin.
5. backlight module as claimed in claim 1, is characterized in that described yellow medium is Yellow ink.
6. backlight module as claimed in claim 5, is characterized in that described Yellow ink has different concentration in the diverse location of described peripheral edge margin.
7. backlight module as claimed in claim 1, is characterized in that described look conversion medium comprises fluorescent material or quanta point material.
8. backlight module as claimed in claim 1, is characterized in that described look conversion medium is arranged on the described exiting surface of described light guide plate.
9. backlight module as claimed in claim 1, is characterized in that described look conversion medium comprises
One quanta point material sheet, so that described blue light is converted to white light on the described exiting surface being stacked and placed on described light guide plate, wherein said quanta point material sheet has at least one side.
10. backlight module as claimed in claim 9, is characterized in that described peripheral edge margin contains the scope being inside contracted a centimeter by each described side towards described zone line.
11. backlight modules as claimed in claim 9, is characterized in that described yellow medium is yellow adhesive tape.
12. backlight modules as claimed in claim 11, is characterized in that described yellow adhesive tape has different thickness in the diverse location of described peripheral edge margin.
13. backlight modules as claimed in claim 9, is characterized in that described yellow medium is Yellow ink.
14. backlight modules as claimed in claim 13, is characterized in that described Yellow ink has different concentration in the diverse location of described peripheral edge margin.
15. backlight modules as claimed in claim 9, is characterized in that, also comprise:
At least one blooming piece, is arranged on described light guide plate, and described quanta point material sheet is between described blooming piece and described light guide plate.
16. backlight modules as claimed in claim 9, is characterized in that the described side of the superimposed described quanta point material sheet of the described peripheral edge margin of described reflector plate.
17. 1 kinds of backlight modules, comprise at least one light emitting diode, a light guide plate, conversion medium of the same colour, a reflector plate and a yellow medium, wherein
Described at least one light emitting diode is used for sending a blue light,
Described light guide plate has at least one incidence surface, and connects described incidence surface and the bottom surface be oppositely arranged and an exiting surface, and the contiguous described incidence surface of described light emitting diode,
So that described blue light is converted to white light on the bang path that described look conversion medium is arranged at described blue light,
Described reflector plate be arranged at contiguous described basal surface position place and the position of described reflector plate overlaps described light guide plate, wherein said reflector plate has at least one side, a peripheral edge margin of adjacent described side and a zone line of adjacent described peripheral edge margin,
Described yellow medium is arranged at least part of described peripheral edge margin.
18. backlight modules as claimed in claim 17, is characterized in that described look conversion medium is arranged on the described exiting surface of described light guide plate.
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| CN201410468628.4A CN105402640B (en) | 2014-09-15 | 2014-09-15 | Backlight module |
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| CN201410468628.4A CN105402640B (en) | 2014-09-15 | 2014-09-15 | Backlight module |
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| CN105402640A true CN105402640A (en) | 2016-03-16 |
| CN105402640B CN105402640B (en) | 2018-04-24 |
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| CN201410468628.4A Active CN105402640B (en) | 2014-09-15 | 2014-09-15 | Backlight module |
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| CN112147813A (en) * | 2019-06-26 | 2020-12-29 | 中强光电股份有限公司 | Light source module and display device |
| CN112305803A (en) * | 2019-07-29 | 2021-02-02 | 瑞仪光电(南京)有限公司 | Light modulation diaphragm, backlight module and display device |
| CN112363351A (en) * | 2020-11-24 | 2021-02-12 | 京东方科技集团股份有限公司 | Backlight module and display device |
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| 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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| CN112147813A (en) * | 2019-06-26 | 2020-12-29 | 中强光电股份有限公司 | Light source module and display device |
| CN112147813B (en) * | 2019-06-26 | 2024-03-19 | 中强光电股份有限公司 | Light source module and display device |
| CN112305803A (en) * | 2019-07-29 | 2021-02-02 | 瑞仪光电(南京)有限公司 | Light modulation diaphragm, backlight 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 |
| CN112578591B (en) * | 2019-09-29 | 2024-06-04 | 高创(苏州)电子有限公司 | Reflecting sheet and backlight module |
| WO2022104554A1 (en) * | 2020-11-17 | 2022-05-27 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN114830021A (en) * | 2020-11-17 | 2022-07-29 | 京东方科技集团股份有限公司 | Backlight module and display device |
| US12038647B2 (en) | 2020-11-17 | 2024-07-16 | K-Tronics (Suzhou) Technology Co., Ltd. | Backlight module and display device |
| CN112363351A (en) * | 2020-11-24 | 2021-02-12 | 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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|---|---|
| CN105402640B (en) | 2018-04-24 |
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Effective date of registration: 20190219 Address after: Hsinchu Science Park, Taiwan, China Patentee after: Zhongqiang Photoelectric Co., Ltd. Address before: Hsinchu Science Park, Taiwan, China Patentee before: YOUNG Lighting Technology Inc |