CN107703678A - A kind of down straight aphototropism mode set and display device - Google Patents

A kind of down straight aphototropism mode set and display device Download PDF

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Publication number
CN107703678A
CN107703678A CN201710812123.9A CN201710812123A CN107703678A CN 107703678 A CN107703678 A CN 107703678A CN 201710812123 A CN201710812123 A CN 201710812123A CN 107703678 A CN107703678 A CN 107703678A
Authority
CN
China
Prior art keywords
light
mode set
down straight
aphototropism mode
backlight
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710812123.9A
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Chinese (zh)
Inventor
文喜平
张登印
区可坚
宋志成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Hisense Electronics Co Ltd
Original Assignee
Qingdao Hisense Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Hisense Electronics Co Ltd filed Critical Qingdao Hisense Electronics Co Ltd
Priority to CN201710812123.9A priority Critical patent/CN107703678A/en
Publication of CN107703678A publication Critical patent/CN107703678A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133605Direct backlight including specially adapted reflectors
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The invention provides a kind of down straight aphototropism mode set and display device, wherein, the down straight aphototropism mode set includes light distribution plate, forms the reflector plate of cavity and the backlight in the cavity with the light distribution plate, wherein, retroreflective regions and the transmission region in addition to the retroreflective regions are provided with the light distribution plate, the retroreflective regions are to be provided with the region of reflecting material.The embodiment of the present invention can enable light be uniformly emitted from exiting surface, and because the intensity of light distribution plate is stronger, reflecting material can be set thereon, and technique is relatively simple, and cost is relatively low.

Description

A kind of down straight aphototropism mode set and display device
Technical field
The present invention relates to display screen technology field, more particularly to a kind of down straight aphototropism mode set and display device.
Background technology
In recent years, the technology of liquid crystal display device more becomes ripe, and application is more and more extensive.With consumer preference and It is required that increase, thinner display device be easier favored by consumer.
In order to reach the purpose of thinned display device, it may be considered that each part of display device is carried out into thickness and subtracted It is thin, such as display panel, blooming piece, backlight module can be thinned respectively.Wherein, because the thickness of backlight module accounts for The larger proportion of display panel thickness, therefore backlight module turns into the main target that display device is thinned.
Backlight module can be divided into down straight aphototropism mode set and side entrance back module, side entering type according to incoming position Backlight module is that LED grain is configured in the edge of LCD screen, then light guide plate of arranging in pairs or groups, when allowing the LED backlight module to light, The light launched from screen edge is transported to center Screen region through light guide plate, but the LED grain quantity ratio used due to it It is less, and be that light is sent to picture by the mode for passing through light guide plate, this can cause the edge picture of LED television bright, Brighter than center Screen, the temperature among the fringe region meeting conversation structure of screen is high.
Down straight aphototropism mode set solves the above mentioned problem of side entrance back module appearance, down straight aphototropism mode set well Be the rear that LED luminescent grains are uniformly arranged on liquid crystal panel as light emitting source, backlight is uniformly communicated to whole screen Curtain, picture detail are more fine and smooth true to nature.
In current direct-type backlight, most of is all to realize the double optimization to light using lens, is matched somebody with somebody simultaneously Suitable light mixing distance is closed, and then realizes the homogenization of whole backlight.But for current lens design techniques, in a backlight The LED quantity used is fewer, in order that uniform light, meets the requirement of subjectivity, and the light mixing distance of backlight requires bigger.Cause This, whole LED spot size is bigger.And for the backlight with subregion, the light between adjacent sectors influences each other Smaller, effect is better, the backlight module with lens used at present, because light mixing distance is larger (generally more than 15mm), light Hot spot is larger after line passes through lens, and overlapping area is larger between two neighboring hot spot, therefore the effect after its subregion is poor.
In order to realize ultra-thin direct-type backlight, while ensure the mutual not shadow of the light between the uniform mixing of light and subregion Ring, attempting to use the mode without lens LED Yu three-dimensional reflector plate in industry at present, such as Fig. 1 backlight module cross-section structure Shown in schematic diagram, the backlight module 10 has support plate 120, the supporting construction 160 being convexly equipped on the loading end 125 of support plate, branch Support structure includes side wall 160a, top 161a, metope 162a, is located between the first diffuser plate 200 and the second diffuser plate 400 Optics regulates and controls film 300, and optics regulation and control film 300 includes reflecting surface 310 and multiple light emitting structures 330, and light emitting structures 330 can be passed through Perforation, non-through hole such as scoring structure is also can be, also have blooming piece 500 above the second diffuser plate.
However, optics regulation and control film is a kind of membrane structure used by prior art, intensity is weaker, punches or presses on film Trace is, it is necessary to operate on plate, each hole or the corresponding knife plate of impression, large number of or even up to a million due to hole or impression, Complex manufacturing technology, cost are high.
The content of the invention
The present invention provides a kind of down straight aphototropism mode set and display device, to solve existing manufacturing backlight module technique Complicated, the problem of cost is high.
In order to solve the above problems, the invention discloses a kind of down straight aphototropism mode set, including light distribution plate, with it is described Light distribution plate forms the reflector plate of cavity and the backlight in the cavity, wherein, set in the light distribution plate Retroreflective regions and the transmission region in addition to the retroreflective regions are equipped with, the retroreflective regions are to be provided with the area of reflecting material Domain.
Preferably, at least two bulge-structures are provided with the reflector plate, wherein, adjacent bulge-structure and the light Cavity is formed between line distribution plate.
Preferably, the lower section of the reflector plate has printed wiring board, and the backlight is arranged on the printed wiring board On, the backlight launches light through the reflector plate in the cavity.
Preferably, the retroreflective regions and the transmission region have multiple respectively, wherein, between adjacent transmission region Between be separated with retroreflective regions.
Preferably, multiple retroreflective regions are continuous.
Preferably, the transmission region is the region of closing, with the center of the backlight on the light distribution plate Be projected as the center of circle, in the range of pre-set radius, the size of transmission region increases with the increase of the distance with the center of circle.
Preferably, in the range of the pre-set radius in the center of circle, the size of multiple transmission regions on same circumference It is equal.
Preferably, the transmission region be shaped as it is circular and/or square.
Preferably, the reflecting material includes white reflection ink.
The embodiment of the invention also discloses a kind of display device, it is characterised in that the display device includes above-mentioned straight Type backlight module.
Compared with prior art, the present invention includes advantages below:
The down straight aphototropism mode set of the embodiment of the present invention includes light distribution plate, the reflection of cavity is formed with light distribution plate Piece and backlight within the cavity, wherein, the retroreflective regions that reflecting material is set are provided with light distribution plate and are removed Transmission region beyond the retroreflective regions, when being allocated using light distribution plate to light, for backlight in cavity The light of interior transmitting, is reflected by retroreflective regions, is emitted by transmission region, makes light from exiting surface so as to realize It can uniformly be emitted, and because the intensity of light distribution plate is stronger, reflecting material can be set thereon, technique is more simple Single, cost is relatively low.
Brief description of the drawings
Fig. 1 is a kind of cross-sectional view of the backlight module of slimming in the prior art;
Fig. 2 is a kind of cross-sectional view of down straight aphototropism mode set of the embodiment of the present invention;
Fig. 3 is a kind of transmission region of the embodiment of the present invention and the distribution schematic diagram of retroreflective regions.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real Applying mode, the present invention is further detailed explanation.
Reference picture 2, show a kind of cross-sectional view of down straight aphototropism mode set of the embodiment of the present invention, it is necessary to say Bright, some other required blooming piece such as diffusion sheet, brightness enhancement film of backlight module is not shown in fig. 2.
As shown in Fig. 2 the down straight aphototropism mode set 1 includes light distribution plate 7, forms cavity with the light distribution plate 7 Reflector plate 4 and the backlight 3 in the cavity, wherein, be provided with the light distribution plate 7 retroreflective regions 9 with And the transmission region 8 in addition to the retroreflective regions, the retroreflective regions 9 are to be provided with the region of reflecting material.
As shown in Fig. 2 in a kind of preferred embodiment of the embodiment of the present invention, the lower section of reflector plate 4 has printed wiring Plate 2, backlight 3 are arranged on printed wiring board 2, and backlight 3 can launch light through reflector plate 4 in cavity.
Specifically, backlight 3 is sending a little for the light of backlight module 1, usual backlight 3 is arranged on printed wiring board 2, With the connection on printed wiring board, to realize the power supply light emitting of backlight.
In the specific implementation, backlight 3 can select light emitting diode (LightEmitting Diode, LED) backlight Source, its caloric value and small volume, be advantageous to reduce the thickness of backlight.
In embodiments of the present invention, backlight 3 can launch light through reflector plate 4 in cavity.In a kind of embodiment party In formula, as shown in Fig. 2 at least two bulge-structures 5 are provided with reflector plate 4, wherein, adjacent bulge-structure 5 and light point Cavity is formed between matching board 7.Specifically, reflector plate 4 is located on printed wiring board 2, except being provided with least two on reflector plate 4 Beyond individual bulge-structure 5, through hole 6, the horizontal position of reflector plate 4 of the through hole 6 between two bulge-structures 5 are also provided with Place is put, the through hole 6 can pass through for backlight 3, so as to facilitate the assembling between reflector plate and printed wiring board.
In one embodiment, the bulge-structure 5 can directly be suppressed by heat pressing process on reflector plate, projection knot The manufacture craft of structure is simple, and cost is relatively low.
The effect of sheet emitting 4 in the embodiment of the present invention is the light that reflective backlight is sent, and is incident to light distribution plate 7 Place.
In one preferred embodiment of the invention, the reflector plate 4 can be three-dimensional reflector plate, and it preferably can be by optics Grade polypropylene (Polypropylene, abbreviation PP) is made so that the reflectivity of reflector plate 4 can be more than or equal to 99%.
Light distribution plate 7 in the embodiment of the present invention can be transparent.In the implementation, the light distribution plate 7 can be adopted It is made with PMMA (polymethacrylates) material, its transmitance can be 93% or so, therefore it can be effectively saturating Light.
The effect of transmission region 8 in the embodiment of the present invention is so that light can be saturating when light incides this region The region is crossed, is incided at the array base palte of display device;The effect of retroreflective regions 9 is so that when light incides this region When, light is reflected, with directive reflector plate again.The presence of retroreflective regions 9 allows the light that backlight is sent in light It is evenly distributed in the presence of line distribution plate, and adjust the light mixing distance of light so that light is reflected in the cavity of formation With outgoing, the display effect of display device is improved.
In one preferred embodiment of the invention, reflecting material can be arranged on the back side (the i.e. light of light distribution plate 7 The distribution plate one side relative with reflector plate) on, reflecting material can be arranged in retroreflective regions by the way of printing.
In one preferred embodiment of the invention, the reflecting material can select white reflection ink so that reflective areas Domain being capable of effective reflection light.
In one preferred embodiment of the invention, transmission region 8 and retroreflective regions 9 have multiple respectively, wherein, it is adjacent Transmission region 8 between be separated with retroreflective regions 9 so that light distribution back transmission region more uniformly spread, improve Light distribution plate distributes the uniformity of light.
Preferably, the figure for being shaped as circular and/or square grade more rule of transmission region 8, so that transparent area Domain is a kind of regular figure so that the uniformity of the light distribution of light distribution plate is more controllable.
Based on above-mentioned retroreflective regions 9 and transmission region 8, when light reaches light 7 lower surface of distribution plate, the biography of light Two kinds of situations can be divided into by broadcasting:A kind of is when light is in position (the i.e. reflective areas of setting white reflection ink in light distribution plate 7 Domain 9) when, light is again introduced into cavity and propagated by ink reflectance;Another is when light is in light distribution plate 7 When being not provided with position (i.e. the transmission region 8) of ink, light can be emitted directly through light guide plate.
In one preferred embodiment of the invention, a kind of transmission region of the embodiment of the present invention shown in reference picture 3 and The distribution schematic diagram of retroreflective regions, the plurality of retroreflective regions 9 be continuous, it is necessary to beam projecting position for non-printing district (i.e. Transmission region 8), the position without beam projecting is Printing Zone (i.e. retroreflective regions 9).
In a kind of preferred embodiment of the embodiment of the present invention, as shown in figure 3, region of the transmission region 8 for closing, with the back of the body The center of light source 3 is projected as the center of circle on light distribution plate 7, in the range of pre-set radius, the size of transmission region 8 with The increase of the distance in the center of circle and increase.
Specifically, being influenceed by LED itself beam angles, low-angle light is relatively more, therefore the brightness at center is high, wide-angle Light it is relatively fewer, therefore surrounding brightness is low.Therefore, center needs to carry out secondary point to light by setting reflecting material Match somebody with somebody, light is reflected and changes direction, the light of surrounding can be supplemented, so that light can be uniformly emitted from exiting surface. Based on this, the trend of transmission region is that the diaphanous spot in face LED centre position is small in the embodiment of the present invention, is gradually prolonged to edge Stretch, diaphanous spot and transmission region are increasing, so that the retroreflective regions in face LED centre position are larger, light is entered Row secondary distribution, be advantageous to improve the distributing uniformity of light.
In practice, because backlight module generally has multiple backlights, for some backlight therein, with this The center of backlight from light distribution plate projection 10 (its position with the position of transmission region 8 above it be it is overlapping, in order to Illustrate clear, the position for projecting 10 staggered with the transmission region 8 above it) it is the center of circle, in the range of pre-set radius, transmission region 8 size increases with the increase with the distance in the center of circle, and multiple transmission regions on same circumference 11 is big Small equal, the purpose so designed is so that, for each backlight targeted design transmission region 8, preferably to the back of the body The light distribution light that light source is sent, improve the uniformity of light distribution plate distribution light.
It should be noted that the projection 10 of the backlight 3 in Fig. 3 in the situation and Fig. 2 of the position consistency of transmission region 8 with carrying on the back The surface of light source 3 is that the signal of retroreflective regions 9 is inconsistent, and for two kinds of situations, the embodiment of the present invention is all feasible, Fig. 2 It is two kinds of embodiments of the embodiment of the present invention with Fig. 3, has no effect on the implementation of the embodiment of the present invention.
It should be noted that for such a situation, for different backlights, the size of pre-set radius scope can be distinguished Adjustment, when having overlapping between the circle in the range of the pre-set radius corresponding to two backlights, the transmission region 8 at lap position Size can not change according to above-mentioned rule, those skilled in the art in order to reach adjustment uniform light distribution purpose, it is right The size of transmission region 8 at these region lap positions carries out adaptation adjustment, such as the size of the transmission region of overlapping region A fixed size can be defined as, its size can be the changing rule institute of the transmission region 8 for first backlight The size A of calculating and for second backlight transmission region 8 changing rule calculate size B between average value or add Weights, this is of course not solely limited to, it is evenly distributed that those skilled in the art can also simulate light using numerical computations software Property and the distribution of transmission region 8 between relation, with find optimal transmission region light distribute back the regularity of distribution.
When certainly, for there is no overlapping between the circle in the range of the pre-set radius corresponding to two backlights, two it is round it Between the determination of size of transmission region 8 be referred to the above method, those skilled in the art can also utilize other methods to It is determined that the embodiment of the present invention is not described in detail here.
The down straight aphototropism mode set of the embodiment of the present invention includes light distribution plate, the reflection of cavity is formed with light distribution plate Piece and backlight within the cavity, wherein, the retroreflective regions that reflecting material is set are provided with light distribution plate and are removed Transmission region beyond the retroreflective regions, when being allocated using light distribution plate to light, for backlight in cavity The light of interior transmitting, is reflected by retroreflective regions, is emitted by transmission region, makes light from exiting surface so as to realize It can uniformly be emitted, and because the intensity of light distribution plate is stronger, reflecting material can be set thereon, technique is more simple Single, cost is relatively low.
In addition, the embodiment of the invention also discloses the backlight module of a kind of display device, including previous embodiment.
Each embodiment in this specification is described by the way of progressive, what each embodiment stressed be with The difference of other embodiment, between each embodiment identical similar part mutually referring to.
Finally, it is to be noted that, herein, such as first and second or the like relational terms be used merely to by One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant meaning Covering including for nonexcludability, so that process, method, commodity or equipment including a series of elements not only include that A little key elements, but also the other element including being not expressly set out, or also include for this process, method, commodity or The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged Except other identical element in the process including the key element, method, commodity or equipment being also present.
A kind of down straight aphototropism mode set provided by the present invention and display device are described in detail above, herein In apply specific case to the present invention principle and embodiment be set forth, the explanation of above example is only intended to help Assistant solves the method and its core concept of the present invention;Meanwhile for those of ordinary skill in the art, the think of according to the present invention Think, in specific embodiments and applications there will be changes, in summary, this specification content should not be construed as pair The limitation of the present invention.

Claims (10)

1. a kind of down straight aphototropism mode set, it is characterised in that form cavity including light distribution plate, with the light distribution plate Reflector plate and the backlight in the cavity, wherein, retroreflective regions are provided with the light distribution plate and except institute The transmission region beyond retroreflective regions is stated, the retroreflective regions are to be provided with the region of reflecting material.
2. down straight aphototropism mode set according to claim 1, it is characterised in that be provided with least two on the reflector plate Bulge-structure, wherein, form cavity between adjacent bulge-structure and the light distribution plate.
3. down straight aphototropism mode set according to claim 1 or 2, it is characterised in that the lower section of the reflector plate has print Wiring board processed, the backlight are arranged on the printed wiring board, and the backlight is through the reflector plate in the cavity Middle transmitting light.
4. down straight aphototropism mode set according to claim 1, it is characterised in that the retroreflective regions and the transparent area Domain have respectively it is multiple, wherein, between adjacent transmission region between be separated with retroreflective regions.
5. down straight aphototropism mode set according to claim 3, it is characterised in that multiple retroreflective regions are continuous.
6. the down straight aphototropism mode set according to claim 4 or 5, it is characterised in that the transmission region is the area of closing Domain, the center of circle is projected as on the light distribution plate with the center of the backlight, in the range of pre-set radius, transmission region Size increase with the increase of the distance with the center of circle.
7. down straight aphototropism mode set according to claim 6, it is characterised in that the pre-set radius scope in the center of circle It is interior, multiple transmission regions on same circumference it is equal in magnitude.
8. according to the down straight aphototropism mode set described in claim 1 or 4 or 5, it is characterised in that the transmission region is shaped as It is circular and/or square.
9. according to the down straight aphototropism mode set described in claim 1 or 2 or 4 or 5, it is characterised in that the reflecting material includes White reflection ink.
10. a kind of display device, it is characterised in that the display device is included under straight as described in claim any one of 1-9 Formula backlight module.
CN201710812123.9A 2017-09-11 2017-09-11 A kind of down straight aphototropism mode set and display device Pending CN107703678A (en)

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Cited By (11)

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CN108535916A (en) * 2018-04-20 2018-09-14 武汉华星光电技术有限公司 Down straight aphototropism mode set and preparation method thereof
CN108919563A (en) * 2018-03-29 2018-11-30 友达光电股份有限公司 Backlight module
CN109461376A (en) * 2018-11-23 2019-03-12 合肥京东方光电科技有限公司 A kind of backlight module and preparation method thereof and display device
CN109581743A (en) * 2018-12-24 2019-04-05 惠州市德赛西威汽车电子股份有限公司 A kind of slim high-new dynamic back lighting device
CN111708222A (en) * 2020-06-23 2020-09-25 合肥领盛电子有限公司 Back plate of liquid crystal display
US10816850B2 (en) 2018-04-20 2020-10-27 Wuhan China Star Optoelectronics Technology Co., Ltd. Direct-lit backlight module and manufacturing method thereof
CN112166371A (en) * 2018-07-13 2021-01-01 三星电子株式会社 Reflection sheet and display device having the same
CN112198713A (en) * 2020-10-21 2021-01-08 业成科技(成都)有限公司 Light source assembly, preparation method thereof, backlight module and display device
CN113031341A (en) * 2021-03-12 2021-06-25 业成科技(成都)有限公司 Light emitting diode light source assembly and reflection structure and display structure thereof
CN113126361A (en) * 2019-12-31 2021-07-16 华为技术有限公司 Backlight module, electronic equipment and lamp strip
CN114566092A (en) * 2022-03-10 2022-05-31 武汉华星光电技术有限公司 Backlight module and display device

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