CN107966856A - A kind of down straight aphototropism mode set and its liquid crystal display device - Google Patents
A kind of down straight aphototropism mode set and its liquid crystal display device Download PDFInfo
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- CN107966856A CN107966856A CN201711250075.5A CN201711250075A CN107966856A CN 107966856 A CN107966856 A CN 107966856A CN 201711250075 A CN201711250075 A CN 201711250075A CN 107966856 A CN107966856 A CN 107966856A
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- Prior art keywords
- light
- mode set
- down straight
- straight aphototropism
- aphototropism mode
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- 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
- G02F1/133603—Direct backlight with LEDs
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
-
- 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
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- 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
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The present invention provides a kind of down straight aphototropism mode set, down straight aphototropism mode set includes light guide plate, light guide plate includes the incidence surface of neighbouring LED light and the light-emitting surface opposite with incidence surface, in the conical socket and light-emitting surface that the incidence surface of light guide plate is set with LED light is correspondingly arranged, back taper connected in star corresponding with conical socket is set, the mating reaction of two sides upper groove realizes the uniform to LED light institute isolychn, compared with correlation technique, without setting lens in LED light in down straight aphototropism mode set in the present invention, it is the uniform that can be achieved to source light also without light mixing distance, so, in the case where ensuring abundant mixed light, the thickness of down straight aphototropism mode set is reduced in vertical direction, be conducive to down straight aphototropism mode set and realize slimming design.
Description
Technical field
This application involves display technology field, more particularly to a kind of down straight aphototropism mode set and its liquid crystal display device.
Background technology
At present, liquid crystal display device is the mainstream of flat display field, since liquid crystal display does not shine in itself, the back of the body
Optical mode group is one of key part and component of liquid crystal display device, and the function of backlight module is just to provide enough brightness and is evenly distributed
Light source, display device is normally shown image.Therefore liquid crystal display device mainly includes backlight module and panel, wherein, the back of the body
The thickness of optical mode group directly determines the thickness of liquid crystal display device, to realize extra-thin liquid crystal display device, it is necessary to subtract
The thickness of few backlight module.
Position according to where light source, backlight module can be divided into sidelight type backlight module and down straight aphototropism mode set.Such as Fig. 1
It is shown, it is the structure diagram of correlation technique down straight aphototropism mode set, according to Fig. 1, down straight aphototropism mode set 100 includes diffuser plate
110th, the light source 120 below diffuser plate, be provided with light source lens 130, the bottom reflector plate 140 positioned at light source side and
Optical diaphragm 150 above diffuser plate.The light that light source is sent is reflexed in diffuser plate through reflector plate, light through diffuser plate and
Panel is sent to after the diffusion of light source diaphragm and atomizing.In backlight module, diffuser plate generally use is PS particles, diffusion
After agent particle and other additives stir evenly, put into extrusion shaping machine and be molded, need at this time by certain light mixing distance and
Realize that emergent light is uniform using scattering process of the diffusant in diffuser plate to light, due to needing certain light mixing distance, then
Certain space is occupied plus light source and lens, causes the thickness of down straight aphototropism mode set larger.For down straight aphototropism mode set
For, light source is located at below diffuser plate, and light source utilization rate is high, suitable for the higher large scale liquid crystal display device of brightness, meanwhile,
Since direct-type backlight, to improve bright dark contrast, the stereovision of picture, can realize good color by Local Dimming
Color effect.Therefore the thickness for reducing down straight aphototropism mode set is the problem of complying with display device slimming development trend urgent need to resolve.
The content of the invention
The present invention is intended to provide a kind of down straight aphototropism mode set and liquid crystal display device, reduce down straight aphototropism mode set
Thickness, realizes the slimming of display device.
To achieve these goals, first aspect present invention provides a kind of down straight aphototropism mode set, including backboard, is located at
Multiple LED light on backboard, light guide plate, the light guide plate include the neighbouring LED light incidence surface and with the incidence surface phase
To light-emitting surface, it is characterised in that：Conical socket corresponding with the LED light is equipped with the incidence surface of the light guide plate,
The light-emitting surface of the light guide plate is equipped with the back taper connected in star being correspondingly arranged with the conical socket.
The down straight aphototropism mode set of the present invention uses the incidence surface in light guide plate to set the taper being correspondingly arranged with LED light recessed
Back taper connected in star corresponding with conical socket is set on groove and light-emitting surface, and the mating reaction of two sides upper groove is realized to LED light
The uniform of institute's isolychn, compared with correlation technique, without being set in LED light in the down straight aphototropism mode set in the present invention
Lens, it is not required that light mixing distance is the uniform that can be achieved to source light, in this way, ensuring the situation of abundant mixed light
Under, the thickness of down straight aphototropism mode set is reduced in vertical direction, is conducive to down straight aphototropism mode set and is realized slimming design.
Brief description of the drawings
Fig. 1 is the structure diagram of the down straight aphototropism mode set in correlation technique；
Fig. 2 is the structure diagram of down straight aphototropism mode set provided by the invention；
Fig. 3 is the part-structure schematic diagram of structure shown in Fig. 2；
Fig. 4 is propagation schematic diagram of the light in light guide plate in down straight aphototropism mode set provided by the invention；
Fig. 5 is the structure diagram of light guide plate used in one embodiment of the invention；
Fig. 6 is site or cavity disperse characteristic schematic diagram on light guide plate in Fig. 5；
Fig. 7 is the structure diagram of light guide plate used in another embodiment of the present invention.
Embodiment
It should be understood that the specific embodiments described herein are used only for explaining the present invention, it is not used to limit this hair
It is bright.
Based in correlation technique, down straight aphototropism mode set at work, need to pass through the refraction of certain light mixing distance, lens
Effect and realize that emergent light is uniform using scattering process of the diffusant in diffuser plate to light, therefore light mixing distance, light source and thoroughly
The space that mirror occupies, causes the thickness of down straight aphototropism mode set larger, is unfavorable for the slimming usage trend of display device.
Therefore, present applicant proposes a kind of down straight aphototropism mode set, light guide plate is used in the module, by light guide plate
Incidence surface is set with setting back taper connected in star corresponding with conical socket on the conical socket and light-emitting surface that LED light is correspondingly arranged,
Make the light that LED light is sent that total reflection occur in light guide plate to propagate, so as to fulfill the uniform to light, two sides upper groove
Mating reaction make in the down straight aphototropism mode set of the present invention without setting lens in LED light, it is not required that light mixing distance
The uniform to source light can be achieved, in this way, in the case where ensuring abundant mixed light, reduce in vertical direction straight
The thickness of type backlight module, slimming design is realized beneficial to down straight aphototropism mode set.
The down straight aphototropism mode set of the present invention will be described in detail by specific embodiment below.
Fig. 2 and Fig. 3 are referred to, Fig. 2 is the structure diagram of down straight aphototropism mode set provided by the invention, and Fig. 3 is Fig. 2 institutes
Show the part-structure schematic diagram of structure.As shown in Fig. 2, down straight aphototropism mode set 200 includes backboard 210；LED on backboard
Lamp bar 220, LED light bar include circuit board 221 and multiple LED light 222 on circuit board；In the top of circuit board, LED light
The reflector plate 230 of lower section；Be arranged on the light guide plate 240 of circuit board, light guide plate 240 include neighbouring LED light incidence surface and
The light-emitting surface opposite with incidence surface, is equipped with conical socket 241 on the incidence surface of light guide plate, and conical socket 241 is corresponding with LED light
Set, the back taper connected in star 242 being correspondingly arranged with conical socket is equipped with the light-emitting surface of light guide plate；And on light guide plate
The optical diaphragm 250 of side.Certainly, in addition, the down straight aphototropism mode set may also include miscellaneous part, such as：For propping up
Support or the glue frame of fixed diaphragm, optical diaphragm may include diffusion barrier and brightness enhancement film etc., and above-mentioned component is those skilled in the art institute
The well known prior art, details are not described herein by the present invention.
The light that LED light 222 used is sent in the present invention is white light, but not limited to this, can be monochromatic light, such as blue light or purple
Outer light etc..The structure and operation principle of LED light are using technology well-known to those skilled in the art in the prior art.
The setting of reflector plate 230 is used to reflect the incidence surface of the light that LED light is sent towards light guide plate 240, improves light
The light utilization in source.
In the down straight aphototropism mode set of the present invention, the diffuser plate that light guide plate is substituted in correlation technique works, according to this
The technological know-how of field technology personnel is understood, it can be achieved that the material that light guide plate 240 acts on is that the present invention is claimed, such as
PMMA, makrolon（PC）, polystyrene（PS）, glass etc..Illustrated below by taking the light guide plate of PMMA materials as an example.
In the present embodiment, as shown in figure 3, being equipped with conical socket corresponding with LED light on the incidence surface of light guide plate
241, and the back taper connected in star 242 being correspondingly arranged on the light-emitting surface of light guide plate with conical socket.Illustratively, conical socket
241st, back taper connected in star 242 can be the profile of inverted conical groove or chamfered edge conical socket, conical socket or back taper connected in star
Inner wall line be curve and/or broken line.The inner wall line that the profile of conical socket 241 is illustrated that in Fig. 3 is meander line, back taper
The inner wall line of 242 profile of connected in star is curve, because including the different point of slope on curve and/or broken line, by adjusting slope
The refraction angle of incident ray can be adjusted, and then realize total reflection, above-mentioned enumerates for one, not limited to this, curve or folding
The shape of line can specifically be set according to being actually needed.
Fig. 4 is propagation schematic diagram of the light in light guide plate in backlight module shown in the embodiment of the present invention, can from Fig. 4
To find out, the light that LED light is sent is irradiated on the inner wall of the conical socket for the light guide plate incidence surface being correspondingly arranged with LED light,
Light is refracted into light guide plate, and the light after refraction is irradiated to the back taper connected in star that is correspondingly arranged with conical socket
On inner wall, light reflects again, and the light after refraction is retained in light guide plate, and light is sent out in light guide plate after reflecting again
Raw total reflection, makes light propagate in the horizontal direction, the equalizing light rays for being emitted light source.In the downward back of the embodiment of the present invention
In optical mode group, two grooves of incidence surface and light-emitting surface realize lensing, change the direction of propagation of light, therefore nothing of the present invention
Lens need to be used, and light occurs total reflection and propagated, it is no longer necessary to which the light mixing distance in traditional down straight aphototropism mode set is come
The irradiated area of increasing light, therefore the general thickness of down straight aphototropism mode set can be reduced, realize the slim of down straight aphototropism mode set
Change, meet slim straight-down negative growth requirement.The gross thickness of down straight aphototropism mode set can be controlled in 10mm in embodiments of the present invention
It is interior.
Conical socket is correspondingly arranged with LED light, in order to ensure that the most light of LED transmittings incides conical socket
Inner wall, the dimension of conical socket are more than the size of LED.LED light may be selected to be placed in conical socket, also may be selected to be positioned over cone
Outside connected in star, therefore the minimum distance of LED light and conical socket is maintained at 0.8 ~ 1.5mm in the present invention, to prevent light guide plate from existing
LED is collided in assembling and ensures the incident efficiency of LED transmitting light.
0.5 ~ 0.6 times of the depth selected as light guide plate of back taper connected in star, between two grooves being oppositely arranged away from
From 0.5mm need to be more than, to ensure light guide plate injection moldable in a mold, too small " lacking material " phenomenon brought of distance is avoided.
For the light guide plate of PMMA materials, PMMA refractive index is 1.49, and light is totally reflected critical in PMMA
Incidence angle is 42.2 °, according to the refractive index and the law of refraction of material, sets corresponding conical socket and back taper connected in star can
Realize total reflection of the light in light guide plate, and then realize the homogenization of light.
Light guide plate used in the present invention can be made by the way of injection molding in a mold.
In addition, as shown in figure 5, in an embodiment of the present invention, it is additionally provided with the incidence surface of light guide plate beneficial to light
The lattice point structure or micro-structure 243 of scattering.Here, lattice point structure can be formed by modes such as ink for screen printing, laser dottings, site
Shape be chosen as round dot, the generation type and dot shape not limited to this of site, can be selected other that use in the prior art
Site form or site generation type.Micro-structure can be formed by the way of hot-forming or direct injection molding, and micro-structure can
For structures such as grooves, similarly, the generation type of micro-structure and the shape of micro-structure are also not necessarily limited to this, can be selected in the prior art
Other microstructure form or micro-structure generation type used.
As shown in figure 5, site or the micro-structure on incidence surface, reflected light are encountered when the light that propagation is totally reflected in light guide plate
Line can be scattered toward all angles, so as to destroy the condition of total reflection, light is projected from the light-emitting surface of light guide plate.Site or micro- knot
The distributional pattern of structure affects the injection distribution of light, in embodiments of the present invention, site as shown in Figure 6 or cavity disperse characteristic
Shown, circular ring shape distribution is presented in site or micro-structure on incidence surface centered on conical socket, and the trend being distributed is more to connect
Nearly center dot density is lower, higher further away from center density, so that emergent ray is uniform.Skilled person will appreciate that,
The distribution of site or micro-structure can be adjusted according to actual effect.
Further, in another embodiment, pyramid, prismatic table shape, circular cone are also formed with the light-emitting surface of light guide plate
Shape or truncated cone-shaped micro-structure, so that emergent ray evenly, further lifts backlight illumination.Fig. 7 is illustrated that going out for light guide plate
The structure diagram of rectangular pyramid micro-structure is formed in smooth surface, as shown in fig. 7, being evenly distributed with tetragonous on the light-emitting surface of light guide plate
Micro-structure 244 is bored, in practical applications, distribution mode is not limited to be uniformly distributed, and can use the regular distribution with regular shape,
Random distribution can be used.Microstructure design on light-emitting surface is conducive to carry out the light extraction from light-emitting surface again mixed light and gathers
Light, and then improve brightness and the uniformity of emergent light.
It the above is only the embodiment of the present invention, it is noted that come for those skilled in the art
Say, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (10)
1. a kind of down straight aphototropism mode set, including backboard, multiple LED light on backboard, light guide plate, the light guide plate include
The incidence surface and the light-emitting surface opposite with the incidence surface of the neighbouring LED light, it is characterised in that：Enter light in the light guide plate
Face is equipped with conical socket corresponding with the LED light, is equipped with and the conical socket pair on the light-emitting surface of the light guide plate
The back taper connected in star that should be set.
2. down straight aphototropism mode set as claimed in claim 1, it is characterised in that the conical socket is cone-shaped groove, is fallen
Conical socket is inverted conical groove.
3. down straight aphototropism mode set as claimed in claim 1 or 2, it is characterised in that conical socket or the back taper connected in star
The inner wall line of profile be curve or broken line.
4. down straight aphototropism mode set as claimed in claim 1, it is characterised in that be provided with to go out for light on the incidence surface
The site penetrated or micro-structure.
5. down straight aphototropism mode set as claimed in claim 4, it is characterised in that the site or micro-structure are recessed with the taper
Circular ring shape distribution is presented centered on groove.
6. down straight aphototropism mode set as claimed in claim 5, it is characterised in that the density of the site or micro-structure is with center
Outwards increase.
7. down straight aphototropism mode set as claimed in claim 1, it is characterised in that pyramid, rib are provided with the light-emitting surface
Platform shape, cone or truncated cone-shaped micro-structure.
8. down straight aphototropism mode set as claimed in claim 1, it is characterised in that the line of conical socket and the back taper connected in star
Size of the degree more than the LED.
9. down straight aphototropism mode set as claimed in claim 1, it is characterised in that material used in the light guide plate is PMMA.
10. a kind of display device, it is characterised in that the display device includes panel and claim 1-9 any one of them
Down straight aphototropism mode set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711250075.5A CN107966856A (en) | 2017-12-01 | 2017-12-01 | A kind of down straight aphototropism mode set and its liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711250075.5A CN107966856A (en) | 2017-12-01 | 2017-12-01 | A kind of down straight aphototropism mode set and its liquid crystal display device |
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| CN107966856A true CN107966856A (en) | 2018-04-27 |
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| CN201711250075.5A Withdrawn CN107966856A (en) | 2017-12-01 | 2017-12-01 | A kind of down straight aphototropism mode set and its liquid crystal display device |
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Cited By (13)
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| CN109031510A (en) * | 2018-08-24 | 2018-12-18 | 京东方科技集团股份有限公司 | A kind of light guide plate and preparation method thereof, backlight module and display device |
| CN109613642A (en) * | 2018-11-30 | 2019-04-12 | 合肥泰沃达智能装备有限公司 | A kind of half-reflection and half-transmission light guide plate |
| CN111768694A (en) * | 2020-06-25 | 2020-10-13 | 博讯光电科技(合肥)有限公司 | Ultra-thin straight following formula backlight unit |
| CN113820887A (en) * | 2021-09-06 | 2021-12-21 | 苏州天禄光科技股份有限公司 | Straight following formula even worn-out fur of mini LED and including backlight unit of this even worn-out fur |
| US11280473B2 (en) | 2019-08-07 | 2022-03-22 | Au Optronics Corporation | Optical lens, light-emitting device and backlight module |
| US11536435B2 (en) * | 2020-06-30 | 2022-12-27 | Boe Technology Group Co., Ltd. | Light homogenizing film, backlight module and display device |
| CN115576134A (en) * | 2022-09-14 | 2023-01-06 | 惠科股份有限公司 | Display module and display device |
| CN115755460A (en) * | 2022-08-12 | 2023-03-07 | 苏州华星光电技术有限公司 | Backlight module and display device |
| US11655957B2 (en) | 2018-01-30 | 2023-05-23 | Brightview Technologies, Inc. | Microstructures for transforming light having Lambertian distribution into batwing distributions |
| US11822158B2 (en) | 2019-09-11 | 2023-11-21 | Brightview Technologies, Inc. | Back light unit for backlit displays |
| US11906842B2 (en) | 2020-01-24 | 2024-02-20 | Brightview Technologies, Inc. | Optical film for back light unit and back light unit including same |
| US12032242B1 (en) | 2023-05-22 | 2024-07-09 | Brightview Technologies, Inc. | Back light unit for backlit displays |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11280473B2 (en) | 2019-08-07 | 2022-03-22 | Au Optronics Corporation | Optical lens, light-emitting device and backlight module |
| US11822158B2 (en) | 2019-09-11 | 2023-11-21 | Brightview Technologies, Inc. | Back light unit for backlit displays |
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| US11536435B2 (en) * | 2020-06-30 | 2022-12-27 | Boe Technology Group Co., Ltd. | Light homogenizing film, backlight module and display device |
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