CN106773294A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN106773294A CN106773294A CN201611189970.6A CN201611189970A CN106773294A CN 106773294 A CN106773294 A CN 106773294A CN 201611189970 A CN201611189970 A CN 201611189970A CN 106773294 A CN106773294 A CN 106773294A
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- light
- backboard
- light source
- backlight module
- source assembly
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- 230000003287 optical effect Effects 0.000 claims description 29
- 238000000605 extraction Methods 0.000 claims description 16
- 230000007423 decrease Effects 0.000 claims description 12
- 238000005286 illumination Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000000630 rising effect Effects 0.000 description 6
- 230000005142 aphototropism Effects 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 241000254158 Lampyridae Species 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- VQLYBLABXAHUDN-UHFFFAOYSA-N bis(4-fluorophenyl)-methyl-(1,2,4-triazol-1-ylmethyl)silane;methyl n-(1h-benzimidazol-2-yl)carbamate Chemical compound C1=CC=C2NC(NC(=O)OC)=NC2=C1.C=1C=C(F)C=CC=1[Si](C=1C=CC(F)=CC=1)(C)CN1C=NC=N1 VQLYBLABXAHUDN-UHFFFAOYSA-N 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005375 photometry Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL 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
- G02F1/00—Devices 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
- G02F1/01—Devices 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
- G02F1/13—Devices 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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL 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
- G02F1/00—Devices 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
- G02F1/01—Devices 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
- G02F1/13—Devices 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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL 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
- G02F1/00—Devices 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
- G02F1/01—Devices 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
- G02F1/13—Devices 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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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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 present invention discloses a kind of backlight module,Including backboard and multiple light-emitting units spliced successively and be fixed on the backboard,Each described light-emitting units includes the light guide that light source assembly and the adjoining light source assembly are set,The light guide includes our department and extension,Described our department is fixed to the backboard,Described our department has the first reflecting surface away from the backboard,The extension is located at described our department away from one end of the light source assembly and with the second reflecting surface away from the backboard,Second reflecting surface is smoothly connected first reflecting surface to be collectively forming the upper reflecting surface of the light guide,The upper reflecting surface is used to that the light that the light source assembly sends to be reflected towards the direction away from the backboard,Receiving space is formed between the extension and the backboard,The receiving space is used to house the light source assembly of the adjacent light-emitting units.Backlight module uniform in light emission of the present invention.Invention additionally discloses a kind of display device.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of backlight module and a kind of display device.
Background technology
Current large scale and slimming are a development trends of LCD TV (LCD TV).Meanwhile, in large-sized TV
Zonal control local dimming (Local dimming) is carried out in backlight, so as to realize that high dynamic illumination renders (High-Dynamic
Range, abbreviation HDR) light is accurately controlled, it is increasingly becoming the direction of industry technology development.
Traditional LCD TV modules can be divided into down straight aphototropism mode set and side entrance back module.Down straight aphototropism mode set is received
To the influence of LED secondary lens size and rising angle, performed poor in terms of slimming.The thickness ratio of side entrance back module
Down straight aphototropism mode set is thin, but its light extraction mode is whole face light guide plate light extraction, due to the limitation of light guide panel material and intensity,
Large scale aspect is difficult, light extraction easily occurs uneven.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of backlight module of uniform in light emission.
Additionally, also providing a kind of display device of the application backlight module.
To achieve these goals, embodiment of the present invention is adopted the following technical scheme that：
On the one hand, there is provided a kind of backlight module, including backboard and multiple splice successively and be fixed on going out on the backboard
Light unit, each described light-emitting units include the light guide that light source assembly and the adjoining light source assembly are set, the leaded light
Part includes our department and extension, and described our department is fixed to the backboard, and described our department has the first reflection away from the backboard
Face, the extension is located at described our department away from one end of the light source assembly and with the second reflection away from the backboard
Face, second reflecting surface is smoothly connected first reflecting surface to be collectively forming the upper reflecting surface of the light guide, it is described on
Reflecting surface is for the light that the light source assembly sends to be reflected towards the direction away from the backboard, the extension and the back of the body
Receiving space is formed between plate, the receiving space is used to house the light source assembly of the adjacent light-emitting units.
Wherein, the light source assembly includes collimation lens and the multiple light sources being intervally arranged, and the collimation lens includes phase
To the incidence surface and exiting surface that set, the light that the multiple light source sends enters mixed in the collimation lens through the incidence surface
Projected from the exiting surface after light.
Wherein, the incidence surface is provided with to the recessed light incidence section in collimation lens inside, and the multiple light source is just right
The light incidence section is set, and the exiting surface includes raised cambered surface and the plane located at the cambered surface both sides, the collimation lens
Cross-sectional area gradually increase to the exiting surface from the incidence surface.
Wherein, the light direction of the light source assembly is parallel to the backboard, on the light direction of the light source assembly,
The upper reflecting surface includes the first raised floor, decline face and the second raised floor that are sequentially connected.
Wherein, going out for the light source assembly forms the first spacing between light center and the backboard, first raised floor
Connect and the second spacing is formed between the end in the decline face and the backboard, second raised floor is away from the decline face
Between end and the backboard formed the 3rd spacing, first spacing more than second spacing and less than the described 3rd between
Away from.
Wherein, the backlight module also includes the optical diaphragm group being oppositely arranged with the backboard and is connected to the backboard
With the frame between the optical diaphragm group, the back of the body is projected through the optical diaphragm group by the light of the upper reflective surface
Light module.
Wherein, multiple projections are interval with one end away from described our department of the extension, it is described raised for supporting
Connect the support optical diaphragm group.
Wherein, light-emitting units splicing is in a row described at least two, and reflection is provided between light-emitting units described in adjacent two row
Plate.
Wherein, gap is formed between the reflecting plate and the optical diaphragm group.
On the other hand, a kind of display device, including the as above backlight module described in any one are also provided.
Compared to prior art, the invention has the advantages that：
Can be used for the light source assembly of the light-emitting units for housing adjacent due to the receiving space, therefore in two
The light source assembly between described our department of the individual adjacent light guide can be contained in the institute of one of them light guide
State in receiving space, so that the light that the light source assembly being contained in the receiving space is sent is by the upper reflection
Face reflects the backlight module, it is to avoid the light of the light source assembly directly projected from the gap between two described our department and
Form bright line so that the light extraction for going out luminous intensity and the marginal zone for being connected other light-emitting units of the light-emitting units mesozone
Intensity is more consistent, the backlight module uniform in light emission, and the display device display quality using the backlight module is high.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, the accompanying drawing to be used needed for implementation method will be made below
Simply introduce, it should be apparent that, drawings in the following description are only some embodiments of the present invention, general for this area
For logical technical staff, on the premise of not paying creative work, other accompanying drawings can also be obtained such as these accompanying drawings.
Fig. 1 is a kind of structural representation of display device provided in an embodiment of the present invention.
Fig. 2 is a kind of structural representation of backlight module provided in an embodiment of the present invention.
Fig. 3 be III in Fig. 2 at structure enlarged diagram.
Fig. 4 is the dimensional structure diagram of the light-emitting units of backlight module shown in Fig. 2.
Fig. 5 is provided with the imagery optical analog result of the model of light-emitting units shown in two Fig. 4.
Fig. 6 is provided with the numerical value optical analog result of the model of light-emitting units shown in two Fig. 4.
Fig. 7 be VII in Fig. 4 at structure enlarged diagram.
Fig. 8 is the front view of the collimation lens of backlight module shown in Fig. 2.
Fig. 9 is the rising angle figure of the light source assembly of backlight module shown in Fig. 2.
Figure 10 is the structural representation of another light source assembly provided in an embodiment of the present invention.
Figure 11 is the front view of the light guide of backlight module shown in Fig. 2.
Figure 12 is the dimensional structure diagram of the part-structure of backlight module shown in Fig. 2.
Figure 13 is a kind of annexation schematic diagram of backlight module shown in Fig. 2.
Specific embodiment
Below in conjunction with the accompanying drawings, embodiments herein is described.
Also referring to Fig. 1 to Fig. 4, the embodiment of the present invention provides a kind of display device 100.The display device 100 is wrapped
The display panel 1 and backlight module 2 being stacked are included, the backlight module 2 is used to provide backlight for the display panel 1
Source.The display panel 1 can be with liquid crystal display panel, then the display device 100 is liquid crystal display.
The backlight module 2 includes backboard 21 and multiple light-emitting units spliced successively and be fixed on the backboard 21
22.Each described light-emitting units 22 includes the light guide 222 that light source assembly 221 and the adjoining light source assembly 221 are set.Institute
Stating light guide 222 includes our department 223 and extension 224, and described our department 223 is fixed to the backboard 21, and described our department 223 has
Away from the first reflecting surface 2231 of the backboard 21, the extension 224 is located at described our department 223 away from the light source assembly
221 one end and with the second reflecting surface 2241 away from the backboard 21, second reflecting surface 2241 is smoothly connected described
To be collectively forming the upper reflecting surface 2221 of the light guide 222, the upper reflecting surface 2221 is used for institute first reflecting surface 2231
State the direction that the light that light source assembly 221 sends is reflected towards away from the backboard 21.The extension 224 and the backboard 21 it
Between form receiving space 220, the receiving space 220 is used to house the light source assembly of the adjacent light-emitting units 22
221.The extension 224 can block the big angle that the light source assembly 221 being contained in the receiving space 220 is sent
Degree light.
In the present embodiment, because the receiving space 220 can be used to house described in the adjacent light-emitting units 22
Light source assembly 221, therefore in the light source assembly 221 between two described our department 223 of the adjacent light guide 222
Can be contained in the receiving space 220 of one of them light guide 222, so that being contained in the receiving space 220
The light that the interior light source assembly 221 is sent reflects the backlight module 2 by the upper reflecting surface 2221, it is to avoid described
The light of light source assembly 221 is directly projected from the gap between two described our department 223 and forms bright line so that the light extraction list
First 22 mesozones go out luminous intensity and are connected more consistent, the back of the body that luminous intensity of the marginal zone of other light-emitting units 22
The uniform in light emission of light module 2, the display quality of the display device 100 using the backlight module 2 is high.
As shown in Figure 5 and Figure 6, Fig. 5 is the light for being provided with the image format of the model of light-emitting units 22 described in two the present embodiment
Analog result is learned, intensity of illumination is represented by shade, the more deep then illumination of color is stronger, otherwise weaker.Fig. 6 is to be provided with two
The optical analog result of the numeric form of the model of light-emitting units 22 described in the present embodiment, formed song is concatenated by each numerical value
Line diagram reaches the change of intensity of illumination.Be can be seen that from Fig. 5 and Fig. 6, in vertical direction, the mesozone of the light-emitting units 22
Go out luminous intensity and be connected other light-emitting units 22 marginal zone the illumination for going out luminous intensity together degree (in illumination photometry value
Minimum value divided by maximum percentage, i.e. MIN/MAX × 100%) can reach 85%.Optical analog result shows this implementation
Example disclosure satisfy that the large scale and slimming demand of the backlight module 2, with realizability.
It should be understood that backlight module 2 described in the present embodiment is saved into using without light guide plate (Air Guide) structure
This, while firefly (Hotspot) phenomenon can be avoided the occurrence of, the optics that improve the backlight module 2 is sampled and described
The display effect of display device 100.Second reflecting surface 2241 is smoothly connected first reflecting surface 2231 to be collectively forming
The upper reflecting surface 2221 of the light guide 222 so that the whole smooth of upper reflecting surface 2221, continuous, is conducive to the backlight
The uniform light extraction of module 2.
Because multiple light-emitting units 22 are spliced successively and are fixed on the backboard 21, the multiple light-emitting units 22
Between can be fixedly secured to one another by structural member, it is easy to assembly.The splicing quantity of the light-emitting units 22 can be according to setting simultaneously
Meter increase in demand, is easy to meet the large scale demand of the display device 100." successively " refer to according to certain described in the present embodiment
Direction arrangement, do not limit erection sequence.
The light guide 222 of the light-emitting units 22 can be fixed to the backboard 21 by fastener, also can be by viscous
The mode for connecing is fixed to the backboard 21.The fastener includes but is not limited to screw, rivet etc..
In one embodiment, described our department 223 is integrally formed with the extension 224 so that the light guide 222
Processing dimension is accurate, and the reflecting effect of described upper reflecting surface 2221 of the light guide 222 is good.In other embodiments, it is described
Extension 224 also can be fixed to the body by modes such as bonding, fastener connection, threaded connection, bayonet connections.
Optionally, the light guide 222 uses white plastic material or white rubber material so that the light guide 222
Described upper reflecting surface 2221 light that the light source assembly 221 is sent can be reflected, the upper reflecting surface 2221
Reflection characteristic carry Gauss scattering angle.Certainly, in other embodiments, the light guide 222 can also use other materials
Material, institute is caused by attaching white reflective piece or coating reflectance coating on reflecting surface 2221 on described in the light guide 222
State reflecting surface 2221 and be capable of reflecting light line.
Also referring to Fig. 3, Fig. 4, Fig. 7 and Fig. 8, used as a kind of alternative embodiment, the light source assembly 221 includes standard
Straight lens 2211 and the multiple light sources 2212 being intervally arranged.The collimation lens 2211 includes the He of incidence surface 2213 being oppositely arranged
Exiting surface 2214, the light that the multiple light source 2212 sends enters mixed in the collimation lens 2211 through the incidence surface 2213
Projected from the exiting surface 2214 after light.The collimation lens 2211 is substantially in bar shaped, the cross section of the collimation lens 2211
It is in substantially bowl-shape, the multiple light source 2212 is spaced along the bearing of trend of the collimation lens 2211.
For example, the multiple light source 2212 is light emitting diode (the Light Emitting of 120 ° of Lambertian
Diode, LED), Fig. 9 be the light that sends of the multiple light source 2212 by the rising angle figure after the collimation lens 2211,
Namely the rising angle figure of the light source assembly 221.As shown in figure 9, by the light type of the light after the collimation lens 2211
It is still in vertical direction 120 ° of lighting angle, then there is focusing in the horizontal direction, lighting angle is reduced to 7 ° or so, therefore
Collimation lens 2211 described in the present embodiment has carried out focus convergence to the light that the multiple light source 2212 sends.
In the present embodiment, the collimation lens 2211 is used to restrain the light that the multiple light source 2212 sends, and is used for
Realize thinner mixed light height so that the rising angle of the light source assembly 221 is small, light extraction is concentrated, propagation distance is remote, described to lead
The regional of the described upper reflecting surface 2221 of light part 222 can fully to the light emitted by the light source assembly 221
Reflected, so that the illumination for improving the backlight module 2 is spent together, the light extraction of the backlight module 2 is more uniformly distributed.It is the multiple
Light source 2212 is uniformly projected after carrying out mixed light in the same collimation lens 2211 by the exiting surface 2214, is improve to institute
State the efficiency of light energy utilization and mixed light quality of multiple light sources 2212.On the premise of ensureing light quality, light source described in the present embodiment
Gap width (pitch) between the multiple light source 2212 that component 221 is allowed is carried on the back compared to existing traditional side entering type
It is bigger for light module 2, so as to the arrangement quantity of the multiple light source 2212 can be reduced, reduce the cost of the backlight module 2.
It should be understood that the light of the light source assembly 221 is projected from the exiting surface 2214, also as whole face light extraction,
Therefore can also be effectively prevented from firefly (Hotspot) phenomenon occur, improve the backlight module 2 optics taste and
The display effect of the display device 100.The light source assembly 221 relatively conventional down straight aphototropism mode set 2, it is to avoid lamp shadow
Taste problem, realizes thinner light mixing distance.
Optionally, the incidence surface 2213 is provided with to the recessed light incidence section 2215 in the inside of the collimation lens 2211, institute
State multiple light sources 2212 just to set the light incidence section 2215 so that the light that the multiple light source 2212 sends can be through described
Light incidence section 2215 is directly entered inside the collimation lens 2211.The interface 2218 of the light incidence section 2215 can substantially be in wave
Shape, including lug boss and the depressed part positioned at the lug boss both sides.
The exiting surface 2214 includes raised cambered surface and the plane located at the cambered surface both sides.The cambered surface is located at described
The center of exiting surface 2214, the plane symmetry ground is located at the cambered surface both sides.
The cross-sectional area of the collimation lens 2211 gradually increases from the incidence surface 2213 to the exiting surface 2214.Example
Such as, the collimation lens 2211 also includes the side 2216 being connected between the incidence surface 2213 and the exiting surface 2214,
The side 2216 is directed away from the direction protrusion of the geometric center of the collimation lens 2211 so that the collimation lens 2211
Cross section is substantially in bowl-shape.
Optionally, also referring to Fig. 3, Fig. 4 and Figure 10, the light source assembly 221 also includes lamp plate 2217, described many
The lamp plate 2217 is fixed at the interval of individual light source 2212.The multiple light source 2212 can be fixed on lamp plate 2217 by piece operation
On.The lamp plate 2217 is contained in the receiving space 220, and the lamp plate 2217 can be fixed to the institute of the light guide 222
State our department 223 towards the side of the receiving space 220.
Also referring to Fig. 3 and Figure 11, used as a kind of alternative embodiment, the light direction of the light source assembly 221 is parallel
In the backboard 21.The light direction of the light source assembly 221 refers to the center side of the light emitted by the light source assembly 221
To (direction of arrow as shown in Figure 3).On the light direction of the light source assembly 221, the upper reflecting surface 2221 include according to
First raised floor 2222 of secondary connection, the decline raised floor 2224 of face 2223 and second, namely the upper reflecting surface 2221 and institute
It is in the trend gradually increase, be gradually reduced, gradually increasing again to state the spacing between backboard 21.
In the present embodiment, because the rising angle of the light source assembly 221 is smaller, so set first raised floor
2222 are used for the light that light source assembly 221 described in direct reflecting part is projected so that the close to sources 2212 of the light-emitting units 22
Region has enough light.A mixed light area, the light are formed between the decline face 2223 and second raised floor 2224
The light major part that source component 221 is projected projects the light-emitting units 22 after mixed light in the mixed light area so that the light extraction
The region of distance light source 2212 of unit 22 has enough light and brightness uniformity.
For example, going out for the light source assembly 221 forms the first spacing between light center 2210 and the backboard 21, institute
State the first raised floor 2222 and connect and the second spacing is formed between the end in the decline face 2223 and the backboard 21, described second
Raised floor 2224 is big away from the 3rd spacing, first spacing is formed between the end in the decline face 2223 and the backboard 21
In second spacing and less than the 3rd spacing.
In the present embodiment, the upper reflecting surface 2221 substantially undulate.Between first spacing is more than described second
Away from so that the light emitted by the light source assembly 221 is most of into the mixed light area, and small part is by first raised floor
2222 directly reflect, and are conducive to the uniform in light emission of the backlight module 2.Described first is smaller than the 3rd spacing so that institute
State the light emitted by light source assembly 221 fully to be reflected, it is to avoid the light extraction to the adjacent light-emitting units 22 is interfered.
Also referring to Fig. 2 and Fig. 3, used as a kind of alternative embodiment, the backlight module 2 also includes and the backboard 21
The optical diaphragm group 23 being oppositely arranged and the frame 24 being connected between the backboard 21 and the optical diaphragm group 23, it is described
The light of the reflection of upper reflecting surface 2221 projects the backlight module 2 through the optical diaphragm group 23.Now, multiple light extraction lists
Unit 22 is located between the optical diaphragm group 23 and the backboard 21.
The optical diaphragm group 23 includes the diffuser plate (Diffusion Sheet), prismatic lens (the Len or that are stacked
Prism Sheet, also known as add lustre plate) and diffusion barrier, the diffuser plate be located at the prismatic lens and the light-emitting units 22 it
Between.The diffuser plate is used to uniformly be spread by the light that the upper reflecting surface 2221 is reflected and anaclasis can be allowed to make a reservation for
Angle.The prismatic lens by by the described careless and sloppy light of the diffuser plate, by the refraction of the prismatic lens make light vertical to
Upper injection, realizes light harvesting.The diffusion barrier is mainly used in preventing the prismatic lens to be scraped off.The diffuser plate can using PET or
PC resin material.
In one embodiment, the frame 24 abuts the optical diaphragm group 23 to realize support.
In another embodiment, it is interval with multiple on one end away from described our department 223 of the extension 224
Support protrusion (support pin), the multiple support protrusion is used to abut the support optical diaphragm group 23.The multiple branch
Supportting raised setting can reduce the thickness of the frame 24, also cause zone line and the marginal zone of the optical diaphragm group 23
Domain can effectively be supported.The multiple support protrusion interval setting, by strictly controlling the multiple support protrusion
Quantity and position so that the setting of the multiple support protrusion enters the influence of the situation of the optical diaphragm group 23 to light very
It is small, go out light quality so as to avoid having influence on the backlight module 2.The multiple support protrusion can be with the extension 224 1
It is body formed.Also can be fixed on the extension 224 by the mode such as being bonded or snapping connection.
It should be understood that the upper reflecting surface 2221 forms spacing, described between the optical diaphragm group 23 all the time
Two raised floors 2224 form a minim gap (for example away between the end in the decline face 2223 and the optical diaphragm group 23
2mm~3mm) so that hardly there is the interference of light between the adjacent light-emitting units 22, while can guarantee that enough again
Light enters the region of end of the optics module just to second raised floor 2224 away from the decline face 2223, prevents
There is concealed wire in the optical diaphragm group 23 so that the uniform in light emission of the backlight module 2.
Certainly, in other embodiments, the upper reflecting surface 2221 also can directly abut the support optical diaphragm group
23。
Optionally, it is fixed on the edge of the backboard 21, the light source assembly 221 that the neighbouring frame 24 is set
(being defined as the first light source assembly 221) can be fixed to the frame 24.Specifically, first light source assembly 221 is described
Lamp plate 2217 and the collimation lens 2211 can be fixed to the frame 24.The backlight module 2 also includes periphery reflecting plate
25, the periphery reflecting plate 25 is located at the periphery of the optical diaphragm group 23, for shutting out the light so that the backlight module 2 weeks
Side forms a light tight area.First light source assembly 221 is just set to the periphery reflecting plate 25 so that the periphery reflection
Plate 25 can block the high angle scattered light that first light source assembly 221 is sent, it is to avoid the light of first light source assembly 221
Line is directly projected and forms bright line so that the light extraction of the backlight module 2 is more uniformly distributed, and the display quality of the display device 100 is high.
Also referring to Fig. 2, Fig. 3 and Figure 12, used as a kind of alternative embodiment, light-emitting units 22 are spelled described at least two
The row of being connected into, multiple rows of light-emitting units 22 are arranged in order in a column direction, and the multiple light-emitting units 22 are arranged in matrix.Often arrange
The light guide 222 and light source assembly 221 in the light-emitting units 22 are arranged alternately (the i.e. two adjacent light guides
Light source assembly 221 is provided between 222, light guide 222 is provided between two adjacent light source assemblies 221).Adjacent two
Arrange and be provided with reflecting plate 26 between the light-emitting units 22, for each described light-emitting units 22 to be spaced so that each institute
The light for stating light-emitting units 22 is reflected inside it, will not be mapped in other adjacent described light-emitting units 22, reduces phase
Light interference between the adjacent light-emitting units 22, improves high dynamic illumination and renders (High-Dynamic Range, abbreviation HDR)
Control the accuracy of light.
Optionally, the height of the reflecting plate 26 is big with the height (not including the support protrusion) of the light guide 222
Cause identical.The reflecting plate 26 is erect and is fixed on the backboard 21, namely the reflecting plate 26 perpendicular to the backboard 21.It is described
Reflecting plate 26 can be pasted to the backboard 21 by modes such as bonding, clampings.Certainly, in other embodiments, reflecting plate is stated
26 height can also be slightly below the height (not including the support protrusion) of the light guide 222.
A minim gap (such as 2mm~3mm) is formed between the reflecting plate 26 and the optical diaphragm group 23 so that phase
Hardly there is the interference of light between the adjacent light-emitting units 22, while can guarantee that enough light enters the optics again
Module prevents concealed wire occur in the optics module so that the light extraction of the backlight module 2 is equal just to the region of the reflecting plate 26
It is even.
Figure 13 is referred to, used as a kind of alternative embodiment, the backlight module 2 also includes controller 27, the controller
The light source assemblies 221 of the 27 multiple light-emitting units 22 of electrical connection, and can independent control each light-emitting units 22 light source
Component 221.
In the present embodiment, the backlight module 2 can be rendered according to high dynamic illumination (High-Dynamic Range,
Abbreviation HDR) demand, the light extraction situation of each light-emitting units 22 is flexibly controlled, realize local dimming (Local
dimming)。
The embodiment of the present invention is described in detail above, specific case used herein to principle of the invention and
Implementation method is set forth, and the explanation of above example is only intended to help and understands the method for the present invention and its core concept；
Simultaneously for those of ordinary skill in the art, according to thought of the invention, can in specific embodiments and applications
There is change part, in sum, this specification content should not be construed as limiting the invention.
Claims (10)
1. a kind of backlight module, it is characterised in that including backboard and multiple light extractions spliced successively and be fixed on the backboard
Unit, each described light-emitting units include the light guide that light source assembly and the adjoining light source assembly are set, the light guide
Including our department and extension, described our department is fixed to the backboard, and described our department has the first reflecting surface away from the backboard,
The extension located at described our department away from one end of the light source assembly and with the second reflecting surface away from the backboard,
Second reflecting surface is smoothly connected first reflecting surface to be collectively forming the upper reflecting surface of the light guide, the upper reflection
Face is used for the direction for being reflected towards away from the backboard by the light that the light source assembly sends, the extension and the backboard it
Between form receiving space, the receiving space is used to house the light source assembly of the adjacent light-emitting units.
2. backlight module as claimed in claim 1, it is characterised in that the light source assembly includes collimation lens and is intervally arranged
Multiple light sources, the collimation lens includes the incidence surface and exiting surface that are oppositely arranged, the light warp that the multiple light source sends
The incidence surface enters in the collimation lens and is projected from the exiting surface after mixed light.
3. backlight module as claimed in claim 2, it is characterised in that the incidence surface is provided with to inside the collimation lens
Recessed light incidence section, the multiple light source is just set to the light incidence section, and the exiting surface includes the cambered surface of projection and located at institute
The plane of cambered surface both sides is stated, the cross-sectional area of the collimation lens gradually increases from the incidence surface to the exiting surface.
4. backlight module as claimed in claim 2 or claim 3, it is characterised in that the light direction of the light source assembly is parallel to institute
Backboard is stated, on the light direction of the light source assembly, the upper reflecting surface includes the first raised floor, the decline face that are sequentially connected
And second raised floor.
5. backlight module as claimed in claim 4, it is characterised in that the light source assembly go out light center and the backboard it
Between form the first spacing, first raised floor to be connected and form the second spacing between the end in the decline face and the backboard,
Second raised floor is more than away from the 3rd spacing, first spacing is formed between the end in the decline face and the backboard
Second spacing and less than the 3rd spacing.
6. backlight module as claimed in claim 1, it is characterised in that the backlight module also includes set relative with the backboard
The optical diaphragm group put and the frame being connected between the backboard and the optical diaphragm group, by the upper reflective surface
Light projects the backlight module through the optical diaphragm group.
7. backlight module as claimed in claim 6, it is characterised in that between on one end away from described our department of the extension
It is described raised for abutting the support optical diaphragm group every multiple projections are provided with.
8. backlight module as claimed in claim 6, it is characterised in that light-emitting units splicing is in a row described at least two, adjacent
Reflecting plate is provided between light-emitting units described in two rows.
9. backlight module as claimed in claim 8, it is characterised in that formed between the reflecting plate and the optical diaphragm group
Gap.
10. a kind of display device, it is characterised in that including the backlight module as described in any one of claim 1~9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611189970.6A CN106773294B (en) | 2016-12-21 | 2016-12-21 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611189970.6A CN106773294B (en) | 2016-12-21 | 2016-12-21 | Backlight module and display device |
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| CN106773294A true CN106773294A (en) | 2017-05-31 |
| CN106773294B CN106773294B (en) | 2020-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611189970.6A Active CN106773294B (en) | 2016-12-21 | 2016-12-21 | Backlight module and display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110133914A (en) * | 2019-05-29 | 2019-08-16 | 深圳市华星光电半导体显示技术有限公司 | A kind of backing structure and preparation method thereof, display device |
| CN115933255A (en) * | 2022-12-30 | 2023-04-07 | 惠科股份有限公司 | Light splitting assembly, backlight module and display module |
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| JP2005235661A (en) * | 2004-02-20 | 2005-09-02 | Citizen Electronics Co Ltd | Backlight |
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| US20100226147A1 (en) * | 2009-03-06 | 2010-09-09 | Chunghwa Picture Tubes, Ltd. | Lightweight light guide plate and backlight module thereof |
| CN105204107A (en) * | 2015-09-11 | 2015-12-30 | 深圳市华星光电技术有限公司 | Liquid crystal display device and backlight module thereof |
| CN106019709A (en) * | 2016-07-25 | 2016-10-12 | 广州创维平面显示科技有限公司 | Liquid crystal module and liquid crystal display screen |
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| JP2005235661A (en) * | 2004-02-20 | 2005-09-02 | Citizen Electronics Co Ltd | Backlight |
| CN101017281A (en) * | 2006-02-10 | 2007-08-15 | 鸿富锦精密工业（深圳）有限公司 | Back light system |
| US20100226147A1 (en) * | 2009-03-06 | 2010-09-09 | Chunghwa Picture Tubes, Ltd. | Lightweight light guide plate and backlight module thereof |
| CN105204107A (en) * | 2015-09-11 | 2015-12-30 | 深圳市华星光电技术有限公司 | Liquid crystal display device and backlight module thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110133914A (en) * | 2019-05-29 | 2019-08-16 | 深圳市华星光电半导体显示技术有限公司 | A kind of backing structure and preparation method thereof, display device |
| CN110133914B (en) * | 2019-05-29 | 2021-12-03 | 深圳市华星光电半导体显示技术有限公司 | Backlight structure, manufacturing method thereof and display device |
| CN115933255A (en) * | 2022-12-30 | 2023-04-07 | 惠科股份有限公司 | Light splitting assembly, backlight module and display module |
| CN115933255B (en) * | 2022-12-30 | 2024-06-18 | 惠科股份有限公司 | Light splitting assembly, backlight module and display module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106773294B (en) | 2020-09-04 |
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Address after: 518132 No. 9-2 Ming Avenue, Guangming New District, Guangdong, Shenzhen Patentee after: TCL China Star Optoelectronics Technology Co.,Ltd. Address before: 518132 No. 9-2 Ming Avenue, Guangming New District, Guangdong, Shenzhen Patentee before: Shenzhen China Star Optoelectronics Technology Co.,Ltd. |
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