CN104806976B - Even smooth direct-light type LED backlight illumination light-distribution lens, system and a kind of TV - Google Patents
Even smooth direct-light type LED backlight illumination light-distribution lens, system and a kind of TV Download PDFInfo
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- CN104806976B CN104806976B CN201510080477.XA CN201510080477A CN104806976B CN 104806976 B CN104806976 B CN 104806976B CN 201510080477 A CN201510080477 A CN 201510080477A CN 104806976 B CN104806976 B CN 104806976B
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- 238000009826 distribution Methods 0.000 title claims abstract description 60
- 238000005286 illumination Methods 0.000 title claims abstract description 38
- 239000002131 composite material Substances 0.000 claims abstract description 160
- 230000012447 hatching Effects 0.000 claims abstract description 35
- 241001646071 Prioneris Species 0.000 claims description 31
- 150000001875 compounds Chemical group 0.000 claims description 17
- 230000007704 transition Effects 0.000 claims description 16
- 235000008429 bread Nutrition 0.000 claims description 9
- 238000000889 atomisation Methods 0.000 claims description 7
- 208000007578 phototoxic dermatitis Diseases 0.000 abstract description 13
- 230000003287 optical effect Effects 0.000 abstract description 12
- 238000009825 accumulation Methods 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 26
- 238000004519 manufacturing process Methods 0.000 description 24
- 238000000034 method Methods 0.000 description 20
- 230000000694 effects Effects 0.000 description 17
- 230000008569 process Effects 0.000 description 10
- 238000012545 processing Methods 0.000 description 10
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- 238000010586 diagram Methods 0.000 description 8
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- 238000009738 saturating Methods 0.000 description 5
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- 230000008859 change Effects 0.000 description 4
- 230000001795 light effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
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- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000009828 non-uniform distribution Methods 0.000 description 2
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- 238000011161 development Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
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Abstract
The present invention relates to backlight technology fields, refer specifically to even smooth direct-light type LED backlight illumination light-distribution lens, system and a kind of TV.The light-distribution lens include lens body, the lens body includes the plane of incidence, exit facet and bottom composite surface, wherein when lens body central axis direction is crossed on the sub- composite surface edge to be splitted, normal of any point in section and the central axis of the lens body intersect at the lower section of lens body on the hatching of sub- composite surface, the Fresnel interface reflection light reflected through the exit facet is reflected away to the direction far from lens body central axis, the accumulation for effectively reducing lens upper center zonal ray increases the even photosensitiveness of optical output field；It can be in same lighting area and under the premise of same illuminance uniformity on diffuser plate, it realizes and increases the distance between LED light source, and shorten the distance between LED light source and diffuser plate, so that the cost of direct-light type LED backlight lighting system declines, volume-diminished.
Description
Technical field
The present invention relates to backlighting technology field, refer specifically to a kind of even smooth direct-light type LED backlight illumination light-distribution lens,
System and a kind of TV.
Background technique
The LED backlight illumination of liquid crystal display television now and the back lighting mode and light structures of LED panel lamp etc. are logical
There are two types of often: a kind of side (LED light axis and light guide plate side are substantially vertical) for plurality of LEDs to be placed on to light guide plate, LED hair
Light out enters in light guide plate by light guide plate side, after multiple total reflection and refraction occur in light guide plate, final institute
The front of some light through the light guide plate transmits, can be in leaded light by accurately controlling the ratio of light guide plate reflection and refraction
Plate front forms uniform light-emitting surface；This mode is often referred to as side entering type lighting method.
Another be plurality of LEDs light source is placed on diffusion back (in this method LED light axis and diffusion back base
This is vertical), in order to which the light for issuing LED is uniformly radiated at diffusion back, need to put between each LED and diffuser plate
It sets a secondary light-distribution lens and is uniformly radiated at diffuser plate after the light that light-distribution lens issue LED carries out secondary distribution
The back side；Light is entered inside diffuser plate by diffusion back and is spread again in this way, goes out to shoot out from the front of diffuser plate,
Uniform light-emitting surface can be formed in diffuser plate front, this mode is often referred to as straight-down negative lighting method.
Above two lighting method compares, and forms same lighting area, and the light travel path of side entering type is much larger than
The light extraction efficiency of straight-down negative, side entering type is low, so its energy consumption is high, at high cost using the lighting method of side entering type.
Recently as the LED backlight illumination of display (such as flat panel television display) and LED panel lamp etc.
The further application and popularization of product.The demand of power conservation requirement and cost control to corresponding product is also more next urgent；It is such
The lower traditional side entering type lighting method of efficiency gradually replaces by straight-down negative lighting method under background.
The development trend of LED downward back optical illumination at present are as follows: as far as possible increase LED between spacing (primarily to
In same area reduce LED quantity) under the premise of reduce from LED light source to diffuser plate thickness (primarily to reduce
System bulk), while also to guarantee the uniformity of irradiation.To light-distribution lens, more stringent requirements are proposed for this.
In the prior art, in order to increase the spacing between LED, while the distance between LED and diffuser plate are compressed, such as Fig. 1
Shown, some straight-down negative systems carry out secondary distribution to the light that LED is issued using reflective lens, allow substantial portion of
The light 120 that LED110 is issued is reflected on the reflective layer 140 on system inner cavity by lens 130, is then re-reflected into diffusion
150 on plate.Although this lighting method can reduce spatial altitude, but larger to the dependence of the characteristic of reflective layer, while to saturating
The smooth depth of the surface precision and installation accuracy of mirror and reflective layer etc. is more demanding, therefore Uniform Illumination relatively difficult to achieve.
There are also straight-down negative system LED is issued using refraction type lens light progress secondary distribution, but be difficult
Uniform Illumination is realized in the case that spacing distance is greatly between LED and distance is small between LED and diffuser plate.
As shown in Fig. 2, the reason of causing illumination unevenness first is that the face shape of lens 220 plane of incidence 221 and exit facet 223
Fairly simple, the plane of incidence and exit facet of some lens are spliced using more spherical surfaces, some using simple conical surface, this
So that the light that LED light source issues is difficult to effectively be distributed in polarizers of big angle scope according to the demand of back lighting.
It, always can there is luxuriant and rich with fragrance alunites when light passes through interface when another major reason is that light is propagated in different media
The reflection of your interface, and the bigger Fresnel interface reflection effect of incident angle is more obvious.Usually close Jie from optically thinner medium to light
When matter is propagated, its Fresnel interface reflectivity will rise with the increase of incidence angle after incidence angle is greater than 60 °；And from close Jie of light
The reflection of Fresnel interface is then more significant when matter is transmitted to optically thinner medium, its Fresnel interface reflectivity after incidence angle is greater than 30 °
It will be steeply risen with the increase of incidence angle.
The light issued from LED light source enters lens body, part light when reaching exit facet after the refraction of the plane of incidence
Line reflects away through exit facet, and other part light is reflected into lens interior by interface, this part reflection light passes through lens
After the multiple reflections in multiple faces such as bottom surface or system inner cavity reflecting surface and refraction, middle section region shape can be leaned on above LED
At gathering for light (energy), the uniformity of lens optical output field has been seriously affected.
With reference in Fig. 2, reached by being located at the light 231 that the LED light source 210 below the plane of incidence is issued into lens 220
It will do it separation when exit facet 223, become refracted light 232 and Fresnel reflected rays 233.Usual refracted light 232 can be taken
The most of energy of band is directly mapped to diffuser plate 250, and Fresnel reflected rays 233 can then carry small part energy and be reflected back lens
Then inside forms secondary reflection light 234 after the object reflection under lens body bottom 222 or lens body bottom, when
Secondary reflection light 234 reflects lens as light 235, after 235 traveling a certain distance of light when encountering exit facet 223 again
Reach diffuser plate 250.It can be seen that light 235 can be above LED210 by middle section region gather by light travelling route.
Since light 231 is to enter optically thinner medium by optically denser medium when reaching exit facet 223, Fresnel interface reflection effect compared with
To be obvious, there are higher reflectivity, thus as the reflection of Fresnel interface and caused by middle part subregion is leaned on above LED210
The phenomenon that domain light (energy) gathers is more significant, eventually affects the uniformity of back lighting.
Summary of the invention
In order to overcome the problems, such as that low-angle light is accumulated near backlight lens centre in the prior art, the present invention provides one kind
Even smooth direct-light type LED backlight illumination light-distribution lens, can reduce the emergent ray due to caused by the reflection of Fresnel interface and exist
The accumulation of center light field, reasonable layout emergent ray can reduce LED backlight panel under the premise of realizing same illuminating effect
On the usage quantity of LED light source can also realize reduce thickness from LED light source to diffuser plate simultaneously, reduce the body of system
Product.
In order to realize that above-mentioned technical effect, the present invention adopt the following technical scheme that: a kind of even smooth direct-light type LED backlight illumination
With light-distribution lens, including lens body, wherein the lens body includes exit facet, the plane of incidence and bottom composite surface；The bottom
Portion's composite surface is located at the bottom of the lens body, and the side close to lens body central axis is connected with the plane of incidence bottom；
The plane of incidence is located at the bottom centre of the lens body, is recessed to lens body top-direction；
The bottom composite surface includes at least one sub- composite surface, when lens body central axis is crossed on the sub- composite surface edge
When direction is splitted, normal of any point in section intersects with the central axis of the lens body on the hatching of sub- composite surface
In the lower section of lens body；The sub- composite surface is by the reflected Fresnel interface reflection light of the exit facet towards deviation
The direction of the lens body central axis reflects away.
In use, LED light-emitting surface flushed with the bottom of the plane of incidence or higher than the plane of incidence bottom.It uses
When, the light that LED light source is issued all enters the lens body after the refraction action of the plane of incidence.
Further, a transition face has can be set close to the side of lens body central axis in the bottom composite surface,
And it is connected by the transition face with the plane of incidence bottom.
Further, height of the hatching of the transition face close to one end of sub- composite surface apart from lens body bottom is big
In the bottom of the plane of incidence to the height of lens body bottom.Transition face is presented one entirely downwards relative to lens body in this way
The shape of recess, and the bottom surface of the plane of incidence is pulled down, the light that LED light source is issued can be preferably collected, because in existing rank
The height of section LED chip is generally very low, and the design of the bottom surface drop-down of the plane of incidence can preferably guarantee the light that LED is issued
Lens body is all entered by the plane of incidence, avoids light energy losses；Moreover, the hatching of transition face is multiple close to son
Height of the one end in conjunction face apart from lens body bottom be greater than the plane of incidence bottom to lens body bottom height design
Enough spaces have been reserved for the setting of sub- composite surface.
The bottom compound bread enclosed tool composite surface of lens body in the present invention, sub- composite surface are ring-type, and overall is in lens
The angle of the top-direction protrusion of ontology, by the Fresnel interface reflection light reflected through the exit facet to deviate lens sheet
The direction of body central axis reflects away, and effectively reduces the center little Jiao due to caused by the reflection light of Fresnel interface in this way
The accumulation for spending light increases the intensity for deviateing the light field of lens centre, improves the even of -90 ° to 90 ° optical output fields on the whole
Photosensitiveness.
Further, the bottom composite surface contains at least two sub- composite surface, passes through non-work between the sub- composite surface
Make face to be connected；The sub- composite surface and non-working surface of the bottom composite surface constitute zigzag annulus；The section of the sub- composite surface
Line length is greater than the section line length of non-working surface adjacent thereto.The bottom composite surface, along the excessively described lens body center
The section of axis, splitting the hatching to be formed is zigzag；Each sawtooth includes the non-working surface and adjacent sub- composite surface
Hatching；This broached-tooth design can save space, can in lesser bottom space, the sub- composite surface of very good solution
Offering question reduces the thickness of lens, compresses the volume of lens, is realized well by Fresnel interface reflection light towards inclined
The technical effect that direction from lens body central axis reflects away.
As a preference, the angle of the non-working surface and lens base is between 75 ° to 90 °；In above-mentioned angle model
The saw-tooth ring for enclosing interior formation can guarantee the effective area of sub- composite surface to the greatest extent, while also facilitate lens body production
Demoulding in the process.
As a preference, the sawtooth root of the saw-tooth profile line of the bottom composite surface is located on the same line,
This sawtooth root is simple in the design structure of same straight line, facilitates processing and the manufacturing, reduces production cost.
Further, the sawtooth root in the bottom composite surface jagged line is located on same straight line, the straight line with
The central axis of lens body；The i.e. described lens body bottom composite surface, sub- composite surface root be located at lens body bottom
Same plane in, such structure design structure is simple, facilitates processing and the manufacturing, reduces production cost.
Preferably as one kind, the sawtooth root on the bottom composite surface saw-tooth profile line is located along the same line, should
Straight line and the central axis of the lens body tilt, and intersect at the lens body with the central axis of the lens body
Above bottom；All serrated faces are located on a big inclined surface in this way, being equivalent to, can preferably realize will be by from out
Penetrate the effect that the reflected Fresnel interface reflection light in face is reflected away to the direction for deviateing lens body central axis.
As a preference, the sawtooth root on the bottom composite surface saw-tooth profile line is located at one to lens body
On the curve of top depression；The normal of every bit and the central axis of the lens body intersect at the lens sheet on the curve
The lower section of body；There is the tilt angle of a gradual change between each sawtooth in this way, can preferably guarantee to reflect away through sawtooth
The even photosensitiveness of light, while being also beneficial to improve the intensity of high angle scattered light.
As a preference, the sub- composite surface hatching is straight line；Such sub- composite surface is equivalent to a circular conical surface,
Structure is simple, convenient for production.
As a preference, the sub- composite surface hatching be curve, curve design can according to reflection band position,
The angle of flexible modulation sub- composite surface and the lens body bottom surface, with the light-out effect being optimal.
Further, the sub- composite surface is identical as the tilt angle of the lens body bottom surface；Identical tilt angle, side
Just processing and fabricating lowers production cost.
As a preference, the tilt angle of the sub- composite surface and the lens body bottom surface, in lens body
The direction of axis is sequentially increased.The design that this tilt angle is sequentially increased can more preferably will be close to the light at lens body center
It is reflected away with deviating more from the direction of lens body central axis, is conducive to further decrease the light heap near lens axis
Product.It can be realized better even light effect.
Further, the hatching equal length of each sub- composite surface, in the bottom composite surface of the lens body
On be evenly distributed；This equally distributed sub- composite surface design, structure is simple, and easy to process and production is conducive to lower life
Produce cost.
As a preference, the section line length edge of the sub- composite surface successively increases to the direction of lens body central axis
Greatly.It is more sparse close to the distribution for crossing lens body center, and the position distribution close to lens body edge is more intensive；It is this outer close
In the tore of reflection band design dredged can reduce sub compound inboard to adjacent close lens of the non-working surface on the outside of the lens
The interference of face institute reflection light.
Further, the face type of sub- composite surface is further improved, the sub- compound bread is multiple containing at least two time
Close unit.Secondary recombiner unit on sub- composite surface is distributed in flakey, the composite surface of this flake type, by the light reflected
Light field is further divided, and the small light field after segmentation is reconfigured, under the premise of not reducing beam projecting efficiency,
Further improve the even photosensitiveness of optical output field.
As a preference, the secondary recombiner unit is plane, the design structure of plane is simple, facilitates processing and production system
It makes, reduces production cost.
As a preference, the secondary recombiner unit is curved surface, the design of curved surface, when light is by described in mutually discrete
When the compound direction away from lens body central axis of son is reflected, there is further peptizaiton to the light reflected, have
Conducive to the even photosensitiveness for improving emergent ray.
As a preference, around the central axis of the lens body to be uniformly distributed in the son compound for the secondary recombiner unit
Such to be uniformly distributed design on face, lens arrangement symmetrically, reduces manufacturing cost.
As a preference, the secondary recombiner unit is also possible to exist around the central axis non-uniform Distribution of the lens body
On corresponding sub- composite surface.
It is like along crossing lens as a preference, the alignment arrangement between secondary recombiner unit on adjacent sub- composite surface
One rule cut-off rule of body central successively will divide sub- composite surface to be formed.Such proper alignment, facilitates processing and production.
As a preference, the arrangement that is staggered between secondary recombiner unit on adjacent sub- composite surface, what segmentation was formed in this way is answered
Light combination field is more uniform.
As a preference, setting hair side for sub- composite surface to further increase the even photosensitiveness of optical output field；Or
Sub- composite surface is subjected to atomization process, no change has taken place in the direction of the light main body reflected in this way by sub- composite surface, still
It is reflected towards the direction as far as possible far from the lens body central axis, but the even photosensitiveness of reflection light is further improved.
Be conducive to improve sub- composite surface to the regular secondary reflection of exit facet and caused by it is unevenly distributed in diffuser plate glazed thread
Phenomenon.
As a preference, by sub- composite surface be arranged to depth-to-width ratio be 0.3, speciality having a size of 0.05 hair side；Join in this way
Several sub- composite surfaces realizes relatively good, even light effect.
Further, hair side will be set by non-working surface；Or non-working surface is subjected to atomization process, by non-working surface
It carries out atomization process or is set as hair side and is advantageous in that, can avoid being irradiated to non-working surface due to part reflected light as far as possible
This part light can be become diffusing reflection, weaken the main direction of this part light by caused unfavorable reflection, the design of hair side
Luminous intensity.
In order to be greatly improved the accumulation problem of low-angle light near the central axis of secondary light-distribution lens, in the present invention,
The face type of the plane of incidence and exit facet has carried out further improvement.
The exit facet of heretofore described lens body and the face type of the plane of incidence are high-order curved surface.Wherein, the plane of incidence with go out
Penetrating face face type can be by equationIt describes, wherein c is curved surface vertex curvature, and k is
Secondary aspherical coefficient, r are radial coordinate (r2=x2+y2), z is axial coordinate, αiFor i term coefficient, i 1,2,3 ... is certainly
So number.
Further, a Xiang Cizhong at least term coefficient α for exit facet face type expression formula i >=6 of lens of the present inventioni
It is not zero.
Further, a Xiang Cizhong at least term coefficient α for plane of incidence face type expression formula i >=4 of lens of the present inventioni
It is not zero.
It can be effectively controlled the distribution of positive refracted light, especially big angle with this lens for having high-order term control plane type
The distribution for spending light, can better meet the needs of back lighting.
Further, in order to guarantee the lens and LED light source installation is accurate and light-distribution lens it is easy to assembly, saturating
The bottom surface or side of mirror are provided with positioning device.
Further, in order to realize the accurate positioning of lens and the installation of LED light source panel and improve installation effectiveness, simplify
Installation process is provided with the lens positioning device and matches in LED panel corresponding with lens or the corresponding position of pcb board
Correspondence positioning device.
As a preference, the positioning device is positioning column.
As a preference, the positioning device is location hole.
As a preference, the positioning device is locating fastener.
It is locating groove as a kind of preferably positioning device.
As a preference, the positioning column, location hole, locating fastener or locating groove are uniform in the lens bottom
Distribution.
As a preference, the positioning column, location hole, locating fastener or locating groove number be whole greater than 1
It is several, such as 2,3,4,5.
Further, the positioning device is arranged in the marginal position of the lens bottom, can be and be set up directly on
The bottom margin of mirror ontology is also possible to that the position of positioning device is specially arranged in the bottom outside of the lens body.
Further, the positioning device of the lens body and the lens body are integrally formed.
As a preference, the positioning device of the lens body and the lens body pass through injection molding or hot pressing mode
It is integrally formed.
A kind of direct-light type LED backlight lighting system based on said lens, the LED light source including pcb board is arranged in are provided
And it is mounted on this direct-type backlight LED lens that secondary light-distribution is realized above LED light source.
Further, the system also includes diffuser plate, the front of the lens is arranged in the diffuser plate.The diffusion
The light that can further be issued LED light source on pcb board of application of plate is more preferable, more evenly be diffused into light-emitting surface.In this way
System may be implemented in same lighting area and under the premise of same illuminance uniformity on diffuser plate, increase LED
The distance between light source reduces LED quantity, and shortens the distance between LED light source and diffuser plate, so that direct-light type LED backlight
The cost of lighting system declines, volume-diminished.
Further, it states reflecting layer and is located at the front of the pcb board and fitted closely with the pcb board；Although using this hair
Bright middle refraction type secondary light-distribution lens are very low to the degree of dependence in reflecting layer, but the use in reflecting layer can preferably improve backlight
The optical energy utilization efficiency of lighting system reaches energy-saving effect well.
The present invention provides a kind of TV, including said lens, or including above-mentioned backlight illuminating system.
The present invention provides a kind of panel light, including said lens.
The invention has the following beneficial effects:
1, the present invention provides a kind of even smooth direct-light type LED backlight illumination light-distribution lens, can reduce due to Fresnel circle
Reflection caused emergent ray in face is realizing same illuminating effect in the accumulation of center light field, more reasonably distribution light
Under the premise of can reduce the usage quantity of LED light source on LED backlight panel while can also realize diminution from LED light source to expansion
The thickness to fall apart reduces the volume of system.
The bottom composite surface of lens of the present invention includes at least one sub- composite surface, when the sub- composite surface is along excessively saturating
When mirror body central axis direction is splitted, normal of any point in section and the lens body on the hatching of sub- composite surface
Central axis intersect at the lower section of lens body.The sub- composite surface of lens bottom is ring-type, and overall is in the top of lens body
Direction protrusion, the Fresnel interface reflection light reflected through the exit facet is anti-to the direction for deviateing lens body central axis
It is shot out, effectively reduces the accumulation of the center low-angle light due to caused by the reflection light of Fresnel interface, increase
The luminous intensity for deviateing the light field of lens centre, so that the publication of emergent ray is more reasonable.
2, a transition face has can be set close to the side of lens body central axis in bottom composite surface of the present invention, and passes through
The transition face is connected with the plane of incidence bottom.And the hatching of transition face is stated close to one end of sub- composite surface apart from lens sheet
The height of body bottom is greater than the bottom of the plane of incidence to the height of lens body bottom.Avoid light energy losses；It is multiple for son simultaneously
Enough spaces have been reserved in the setting in conjunction face.
3, when present invention composite surface comprising at least two, it is connected between the sub- composite surface of the present invention by non-working surface, and
Zigzag annulus is constituted, zigzag annulus of the present invention can save space, it is compound can solve son in lesser bottom space
The offering question in face reduces the thickness of lens, compresses the volume of lens, reaches that Fresnel interface reflection light is saturating towards deviateing
The technical effect that the direction of mirror body central axis reflects away.
4, further the sub- composite surface of the present invention is split, is formed by flake type composite surface, each recombiner unit
Between mutually it is discrete, the light field of the light reflected is further divided, the small light field after segmentation is reconfigured,
Under the premise of not reducing beam projecting efficiency, the even photosensitiveness of optical output field is further improved.
5, the face type of the exit facet and the plane of incidence of heretofore described lens body is high power curved surface, preferably realization pair
The reasonable distribution of light.
6, the bottom surface of lens and side are provided with positioning device, ensure that the lens and LED light source installation accurately with
And light-distribution lens is easy to assembly.
Lens of the present invention can more reasonably distribute light in a word, improve in the prior art, since Fresnel interface is anti-
The low-angle light accumulation problem near caused central axis is penetrated, and improves the uniformity by lens optical output field.
The usage quantity of the LED light source on LED backlight panel can be reduced under the premise of realizing same illuminating effect while can be with
It realizes the thickness reduced from LED light source to diffuser plate, reduces the volume of system.
Detailed description of the invention
Fig. 1 is reflective backlight lens system schematic diagram in the prior art.
Fig. 2 is the system schematic of refraction type backlight lens in the prior art.
Fig. 3 is this even smooth direct-light type LED backlight illumination light-distribution lens stereoscopic and half-sectional structure chart.
Fig. 4 is the bottom composite surface section partial enlargement diagram of this even smooth direct-light type LED backlight illumination light-distribution lens.
Fig. 5 is the diagrammatic cross-section of the bottom composite surface of this even smooth direct-light type LED backlight illumination light-distribution lens.
Fig. 6 is the schematic perspective view of embodiment 1.
Fig. 7 is the diagrammatic cross-section of embodiment 1.
Fig. 8 is the bottom view of embodiment 1.
Fig. 9 is the schematic perspective view of embodiment 2.
Figure 10 is the diagrammatic cross-section of embodiment 2.
Figure 11 is the bottom view of embodiment 2.
Figure 12 is the three-dimensional structure diagram of embodiment 3.
Figure 13 is the diagrammatic cross-section of embodiment 3.
Figure 14 is the schematic perspective view of embodiment 4.
Figure 15 is the diagrammatic cross-section of embodiment 4.
Figure 16 is the bottom view of embodiment 4.
Figure 17 is the three-dimensional structure diagram of embodiment 5.
Figure 18 is the diagrammatic cross-section of embodiment 5.
Figure 19 is the bottom view of embodiment 5.
Figure 20 is the stereoscopic schematic diagram of embodiment 6.
Specific embodiment
With reference to the accompanying drawings and embodiments, the technical schemes of the invention are described in detail.
The present invention provides a kind of even smooth direct-light type LED backlight illumination light-distribution lens, can reduce due to Fresnel interface
Accumulation of the caused emergent ray of reflection in center light field, reasonable layout emergent ray, before realizing same illuminating effect
It puts the usage quantity that can reduce the LED light source on LED backlight panel while can also realize diminution from LED light source to diffusion
The thickness of plate reduces the volume of system.
In order to realize that above-mentioned technical effect, the present invention adopt the following technical scheme that:
In order to solve problem above, the present invention proposes a kind of even smooth direct-light type LED backlight illumination light-distribution lens, such as Fig. 3
It is shown, including lens body 300, wherein the lens body 300 includes exit facet 302, the plane of incidence 301 and bottom composite surface
303；The exit facet 302, the plane of incidence 301 and bottom composite surface 303 are coaxial with lens body 300；
Wherein the exit facet 302 is located at the upper surface of the lens body 300, the bottom of the exit facet 300 and institute
The bottom composite surface 303 for stating lens body 300 is connected (can also be connected by side 304 with bottom composite surface 303)；
The bottom composite surface is located at the bottom of the lens body 303, close to 300 central axis of lens body side with
The plane of incidence 301 is connected；
The plane of incidence 301 is located at the bottom centre of the lens body 300, is recessed to 300 top-direction of lens body.
The exit facet 302, the plane of incidence 301 and bottom composite surface 303 are corresponding bus around Lens ontology 300
Center axis rotation and the axisymmetric shape formed.(partial enlargement diagram of the bottom composite surface 303 is as shown in Figure 4)
Further, the bottom composite surface 303 includes at least one sub- composite surface 303-1, the sub- composite surface
303-1 along the section for crossing lens body central axis, on the hatching splitted normal FF ' of any point on section with it is described
The central axis OO ' of lens body intersects at the lower section (as shown in Figure 5) of lens body；The sub- composite surface is anti-by the exit facet
The Fresnel interface reflection light come is emitted back towards to reflect away towards the direction for deviateing the lens body central axis.
In use, LED light-emitting surface flushed with the bottom of the plane of incidence or higher than the plane of incidence bottom.It uses
When, the light that LED light source is issued all enters the lens body after the refraction action of the plane of incidence.
Further, as shown in figure 4, the bottom composite surface can be set one close to the side of lens body central axis
A transition face 303-4, and be connected by the transition face 303-4 with the plane of incidence bottom.
Further, height of the hatching of the transition face close to one end of sub- composite surface apart from lens body bottom is big
In the bottom of the plane of incidence to the height of lens body bottom.Transition face is presented one entirely downwards relative to lens body in this way
The shape of recess, and the bottom surface of the plane of incidence is pulled down, the light that LED light source is issued can be preferably collected, because in existing rank
The height of section LED chip is generally very low, and the design of the bottom surface drop-down of the plane of incidence can preferably guarantee the light that LED is issued
Lens body is all entered by the plane of incidence, avoids light energy losses；Moreover, the hatching of transition face is multiple close to son
Height of the one end in conjunction face apart from lens body bottom be greater than the plane of incidence bottom to lens body bottom height design
Enough spaces have been reserved for the setting of sub- composite surface.
Further, the bottom composite surface contains at least two sub- composite surface 303-1, the compound face 303-1 of son it
Between by non-working surface 303-2 be connected；The bottom composite surface 303 is splitted by the section of the lens body central axis
The hatching of formation is zigzag (as shown in Fig. 3, Fig. 4 and Fig. 5)；This broached-tooth design can save space, can be lesser
In bottom space, the offering question of the sub- composite surface of very good solution reduces the thickness of lens, compresses the volume of lens, well
Realize the technical effect for reflecting away Fresnel interface reflection light towards the direction for deviateing lens body central axis.
As a preference, the angle (as shown in Fig. 4 label 303-3) of the non-working surface 303-2 and lens base is
Between 75 ° to 90 °；The saw-tooth ring formed in above-mentioned angular range can guarantee the significant surface of sub- composite surface to the greatest extent
Product, while also facilitating the demoulding in lens body production process.
As a preference, the sawtooth root of the saw-tooth profile line of the bottom composite surface is located on the same line,
This sawtooth root is simple in the design structure of same straight line, facilitates processing and the manufacturing, reduces production cost.
Further, the sawtooth root in the bottom composite surface jagged line is located on same straight line, the straight line with
The central axis of lens body；The i.e. described lens body bottom composite surface, sub- composite surface root be located at lens body bottom
Same plane in, such structure design structure is simple, facilitates processing and the manufacturing, reduces production cost.
Preferably as one kind, the sawtooth root on the bottom composite surface saw-tooth profile line is located along the same line, should
Straight line and the central axis of the lens body tilt, and intersect at the lens body with the central axis of the lens body
Above bottom；All serrated faces are located on a big inclined surface in this way, being equivalent to, can preferably realize will be by from out
Penetrate the effect that the reflected Fresnel interface reflection light in face is reflected away to the direction for deviateing lens body central axis.
As a preference, the sawtooth root on the bottom composite surface saw-tooth profile line is located at one to lens body
On the curve of top depression；The normal of every bit and the central axis of the lens body intersect at the lens sheet on the curve
The lower section of body；There is the tilt angle of a gradual change between each sawtooth in this way, can preferably guarantee to reflect away through sawtooth
The even photosensitiveness of light, while being also beneficial to improve the intensity of high angle scattered light.
As a preference, the sub- composite surface hatching is straight line；Such sub- composite surface is equivalent to a circular conical surface,
Structure is simple, convenient for production.
As a preference, the sub- composite surface hatching be curve, curve design can according to reflection band position,
The angle of flexible modulation sub- composite surface and the lens body bottom surface, with the light-out effect being optimal.
Further, the sub- composite surface is identical as the tilt angle of the lens body bottom surface；Identical tilt angle, side
Just processing and fabricating lowers production cost.
As a preference, the tilt angle of the sub- composite surface and the lens body bottom surface, in lens body
The direction of axis is sequentially increased.The design that this tilt angle is sequentially increased can more preferably will be close to the light at lens body center
It is reflected away with deviating more from the direction of lens body central axis, is conducive to further decrease the light heap near lens axis
Product.It can be realized better even light effect.
Further, the hatching equal length of each sub- composite surface, in the bottom composite surface of the lens body
On be evenly distributed；This equally distributed sub- composite surface design, structure is simple, and easy to process and production is conducive to lower life
Produce cost.
As a preference, the section line length edge of the sub- composite surface successively increases to the direction of lens body central axis
Greatly.It is more sparse close to the distribution for crossing lens body center, and the position distribution close to lens body edge is more intensive；It is this outer close
In the tore of reflection band design dredged can reduce sub compound inboard to adjacent close lens of the non-working surface on the outside of the lens
The interference of face institute reflection light.
Further, the face type of sub- composite surface is further improved, the sub- compound bread is multiple containing at least two time
Close unit.Secondary recombiner unit on sub- composite surface is distributed in flakey, the composite surface of this flake type, by the light reflected
Light field is further divided, and the small light field after segmentation is reconfigured, under the premise of not reducing beam projecting efficiency,
Further improve the even photosensitiveness of optical output field.
As a preference, the secondary recombiner unit is plane, the design structure of plane is simple, facilitates processing and production system
It makes, reduces production cost.
As a preference, the secondary recombiner unit is curved surface, the design of curved surface, when light is by described in mutually discrete
When the compound direction away from lens body central axis of son is reflected, there is further peptizaiton to the light reflected, have
Conducive to the even photosensitiveness for improving emergent ray.
As a preference, around the central axis of the lens body to be uniformly distributed in the son compound for the secondary recombiner unit
Such to be uniformly distributed design on face, lens arrangement symmetrically, reduces manufacturing cost.
As a preference, the secondary recombiner unit is also possible to exist around the central axis non-uniform Distribution of the lens body
On corresponding sub- composite surface.
It is like along crossing lens as a preference, the alignment arrangement between secondary recombiner unit on adjacent sub- composite surface
One rule cut-off rule of body central successively will divide sub- composite surface to be formed.Such proper alignment, facilitates processing and production.
As a preference, the arrangement that is staggered between secondary recombiner unit on adjacent sub- composite surface, what segmentation was formed in this way is answered
Light combination field is more uniform.
As a preference, setting hair side for sub- composite surface to further increase the even photosensitiveness of optical output field；Or
Sub- composite surface is subjected to atomization process, no change has taken place in the direction of the light main body reflected in this way by sub- composite surface, still
It is reflected towards the direction as far as possible far from the lens body central axis, but the even photosensitiveness of reflection light is further improved.
Facilitate the halation phenomenon of elimination emergent light light field edge.Be conducive to improve the regular secondary reflection of sub- composite surface and cause
The phenomenon that diffuser plate glazed thread is unevenly distributed.
As a preference, by sub- composite surface be arranged to depth-to-width ratio be 0.3, speciality having a size of 0.05 hair side；Join in this way
Several sub- composite surfaces realizes relatively good, even light effect.
Further, hair side will be set by non-working surface；Or non-working surface is subjected to atomization process, by non-working surface
It carries out atomization process or is set as hair side and is advantageous in that, can avoid being irradiated to non-working surface due to part reflected light as far as possible
This part light can be become diffusing reflection, weaken the main direction of this part light by caused unfavorable reflection, the design of hair side
Luminous intensity.
In order to be greatly improved the accumulation problem of low-angle light near the central axis of secondary light-distribution lens, in the present invention,
The face type of the plane of incidence and exit facet has carried out further improvement.
The exit facet of heretofore described lens body and the face type of the plane of incidence are high power curved surface.Wherein, the plane of incidence with
Exit facet face type can be by equationIt describes, wherein c is curved surface vertex curvature, k
For secondary aspherical coefficient, r is radial coordinate (r2=x2+y2), z is axial coordinate, αiFor i term coefficient, i 1,2,3 ...
Natural number.
Further, a Xiang Cizhong at least term coefficient α for exit facet face type expression formula i >=6 of lens of the present inventioni
It is not zero.
Further, a Xiang Cizhong at least term coefficient α for plane of incidence face type expression formula i >=4 of lens of the present inventioni
It is not zero.
It can be effectively controlled the distribution of positive refracted light, especially big angle with this lens for having high-order term control plane type
The distribution for spending light, can better meet the needs of back lighting.
Further, in order to guarantee the lens and LED light source installation is accurate and light-distribution lens it is easy to assembly, saturating
The bottom surface or side of mirror are provided with positioning device.
Further, in order to realize the accurate positioning of lens and the installation of LED light source panel and improve installation effectiveness, simplify
Installation process is provided with the lens positioning device and matches in LED panel corresponding with lens or the corresponding position of pcb board
Correspondence positioning device.
As a preference, the positioning device is positioning column.
As a preference, the positioning device is location hole.
As a preference, the positioning device is locating fastener.
It is locating groove as a kind of preferably positioning device.
As a preference, the positioning column, location hole, locating fastener or locating groove are uniform in the lens bottom
Distribution.
As a preference, the positioning column, location hole, locating fastener or locating groove number be whole greater than 1
It is several, such as 2,3,4,5.
Further, the positioning device is arranged in the marginal position of the lens bottom, can be and be set up directly on
The bottom margin of mirror ontology is also possible to that the position of positioning device is specially arranged in the bottom outside of the lens body.
Further, the positioning device of the lens body and the lens body are integrally formed；Its molding mode is heat
Pressure or injection molding.
A kind of direct-light type LED backlight lighting system based on said lens, the LED light source including pcb board is arranged in are provided
And it is mounted on this direct-type backlight LED lens that secondary light-distribution is realized above LED light source.
Further, the system also includes diffuser plate, the front of the lens is arranged in the diffuser plate.The diffusion
The light that can further be issued LED light source on pcb board of application of plate is more preferable, more evenly be diffused into light-emitting surface.In this way
System may be implemented in same lighting area and under the premise of same illuminance uniformity on diffuser plate, increase LED
The distance between light source reduces LED quantity, and shortens the distance between LED light source and diffuser plate, so that direct-light type LED backlight
The cost of lighting system declines, volume-diminished.
Further, the system also includes reflecting layer, the reflecting layer be located at the pcb board front and the PCB
Plate fits closely；It is very low to the degree of dependence in reflecting layer using refraction type secondary light-distribution lens in the present invention, it can not use
Efficient uniform illumination is realized in the case where reflecting layer, but the use in reflecting layer preferably improves the use of LED light source
Efficiency, although very low to the degree of dependence in reflecting layer using refraction type secondary light-distribution lens in the present invention, reflecting layer makes
With the optical energy utilization efficiency that can preferably improve backlight illuminating system, reach energy-saving effect well.
The present invention provides a kind of TV, including said lens, or including above-mentioned backlight illuminating system.
The present invention provides a kind of panel light, including said lens.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Embodiment 1
The bottom compound bread of backlight lens in the present embodiment contains a sub- composite surface, on the sub- composite surface section on
The normal at any point and the central axis of the lens body intersect at the lower section of the lens body, the lens in the present embodiment
Structure is simple, is easy to produce in enormous quantities；(wherein Fig. 6 is the schematic perspective view of the present embodiment as shown in Fig. 6, Fig. 7 and Fig. 8；
Fig. 7 is the diagrammatic cross-section of the present embodiment；Fig. 8 is the bottom view of the present embodiment).Remaining structure of the present embodiment and working principle
Identical as above-mentioned specific embodiment, details are not described herein.
Embodiment 2
The bottom compound bread that backlight lens in the present embodiment include contains 6 sub- composite surfaces, the bottom composite surface
Hatching is zigzag, and the sawtooth root of the hatching of the bottom composite surface is located along the same line, the straight line and this implementation
The example lens body it is central axial vertical；And the hatching of the sub- composite surface is linear structure, the moreover son
Composite surface is the arrangement mode denser closer to lens body edge, and (wherein Fig. 9 is this reality as shown in Fig. 9, Figure 10, Figure 11
Apply the schematic perspective view of example；Figure 10 is the diagrammatic cross-section of the present embodiment；Figure 11 is the bottom view of the present embodiment), this reality
It applies remaining structure of example and working principle is identical as above-mentioned specific embodiment, details are not described herein.
Embodiment 3
The bottom compound bread that backlight lens in the present embodiment include contains 6 sub- composite surfaces, the bottom composite surface
Hatching is zigzag, and the sawtooth root of the hatching of the bottom composite surface is located on curve, and any point is got on the curve
It is bigger close to its distance apart from lens base of lens body central axis；And the hatching of the sub- composite surface is linear structure,
Moreover the sub- composite surface is the arrangement mode denser closer to lens body edge, (its as shown in Figure 12 and Figure 13
Middle Figure 12 is the stereoscopic schematic diagram of the present embodiment, and Figure 13 is the diagrammatic cross-section of the present embodiment), remaining structure of the present embodiment and
Working principle is identical as above-mentioned specific embodiment, and details are not described herein.
Embodiment 4
The bottom compound bread that backlight lens in the present embodiment include contains 6 sub- composite surfaces, the bottom composite surface
Hatching is zigzag, and the sawtooth root of the hatching of the bottom composite surface is located on curve, and any point is got on the curve
It is bigger close to its distance apart from lens base of lens body central axis；The hatching of the sub- composite surface is linear structure, and
The sub- composite surface is the arrangement mode denser closer to lens body edge, and moreover every height in the present embodiment is multiple
Include 60 recombiner units in conjunction face, and is mutually aligned between the secondary recombiner unit on every straton composite surface.Such as Figure 14, Figure 15
With shown in Figure 16, (wherein, Figure 14 is the stereoscopic schematic diagram of the present embodiment, and Figure 15 is the diagrammatic cross-section of the present embodiment, Tu16Shi
The elevational schematic view of the present embodiment), remaining structure of the present embodiment and working principle are identical as above-mentioned specific embodiment, herein
It repeats no more.
Embodiment 5
The bottom compound bread that backlight lens in the present embodiment include contains 6 sub- composite surfaces, the bottom composite surface
Hatching is zigzag, and the sawtooth root of the hatching of the bottom composite surface is located on curve, and any point is got on the curve
It is bigger close to its distance apart from lens base of lens body central axis；The hatching of the sub- composite surface is linear structure, and
The sub- composite surface is the arrangement mode denser closer to lens body edge, and moreover every height in the present embodiment is multiple
Include 60 recombiner units in conjunction face, and is mutually staggered between the secondary recombiner unit on every straton composite surface.Such as Figure 17, Figure 18
With shown in Figure 19, (it is the cross-section structure signal of the present embodiment that wherein Figure 17, which is schematic perspective view Figure 18 of the present embodiment,
Figure, Figure 19 is the bottom view of the present embodiment), remaining structure of the present embodiment and working principle and above-mentioned specific embodiment phase
Together, details are not described herein.
Embodiment 6
As shown in figure 20, the bottom of the backlight lens in the present embodiment has positioning column D, wherein of the positioning column D
Number is 3, is evenly distributed in the bottom margin of lens, being set in special positioning column installation site in the present embodiment,
It is integrally formed with lens body in the present embodiment.Remaining structure of the present embodiment and working principle and above-mentioned specific embodiment phase
Together, details are not described herein.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (18)
1. a kind of even smooth direct-light type LED backlight illumination light-distribution lens, including lens body, wherein the lens body includes
Penetrate face, the plane of incidence and bottom composite surface；The bottom composite surface is located at the bottom of the lens body, close to lens body center
The side of axis is connected with the plane of incidence；The plane of incidence is located at the bottom centre of the lens body, to lens body top
Direction recess；It is characterized in that:
The bottom composite surface contains at least two sub- composite surface, when the sub- composite surface is cutd open along lens body central axis direction is crossed
When opening, normal of any point in section and the central axis of the lens body intersect at lens on the hatching of sub- composite surface
The lower section of ontology: the sub- composite surface is by the exit facet reflected part Fresnel interface reflection light away from institute
The direction for stating lens body central axis reflects away；
It is connected between the sub- composite surface by non-working surface；The sub- composite surface and non-working surface of the bottom composite surface constitute saw
Toothed annulus band；
The sawtooth root of the saw-tooth profile line of the bottom composite surface is located on the same line and the straight line and lens sheet
The central axis of body or the bottom top that the lens body is tilted and intersected at the central axis of lens body；Alternatively,
The sawtooth root of the saw-tooth profile line of the bottom composite surface is located on a curve to lens body top depression and institute
State the lower section that the normal of every bit and the central axis of the lens body on curve intersect at the lens body；
The bottom composite surface is provided with a transition face, the son of the bottom composite surface close to the side of lens body central axis
Composite surface is connected by the transition face with the plane of incidence bottom；
Height of the hatching of the transition face close to one end of sub- composite surface apart from lens body bottom is greater than the bottom of the plane of incidence
Height of the portion to lens body bottom.
2. even smooth direct-light type LED backlight illumination light-distribution lens as described in claim 1, characterized in that the sub- composite surface
Be arranged in the illumination of lens body bottom from peak value to the region of 10% peak value in；The sub- composite surface hatching be straight line or
For curve.
3. even smooth direct-light type LED backlight illumination light-distribution lens as described in claim 1, characterized in that the non-working surface
Angle with lens base is between 75 ° to 90 °.
4. even smooth direct-light type LED backlight illumination light-distribution lens as described in claim 1, characterized in that the sub- composite surface
Section line length be greater than non-working surface adjacent thereto section line length.
5. even smooth direct-light type LED backlight illumination light-distribution lens as described in claim 1, characterized in that the sub- composite surface
Hatching be straight line or curve.
6. even smooth direct-light type LED backlight illumination light-distribution lens as described in claim 1, characterized in that each son is multiple
Angle is formed between conjunction face and the lens body bottom surface, and each angle is identical.
7. even smooth direct-light type LED backlight illumination light-distribution lens as described in claim 1, characterized in that each son is multiple
Angle is formed between conjunction face and the lens body bottom surface, and each angle is gradually increased along the direction close to lens centre axis.
8. even smooth direct-light type LED backlight illumination light-distribution lens as described in claim 1, characterized in that each son is multiple
The hatching equal length in conjunction face.
9. even smooth direct-light type LED backlight illumination light-distribution lens as described in claim 1, characterized in that the sub- composite surface
Section line length along being sequentially increased to the direction of lens body central axis.
10. the even smooth direct-light type LED backlight illumination light-distribution lens as described in one of claim 1 to 9, characterized in that described
Sub- compound bread is containing at least two time recombiner unit.
11. even smooth direct-light type LED backlight illumination light-distribution lens as claimed in claim 10, characterized in that described time compound
Unit is plane, or is curved surface.
12. even smooth direct-light type LED backlight illumination light-distribution lens as claimed in claim 10, characterized in that adjacent son is compound
Arrangement, or the arrangement that is staggered are aligned between secondary recombiner unit on face.
13. even smooth direct-light type LED backlight illumination light-distribution lens as claimed in claim 1 or 2, characterized in that son is compound
Face is set as atomization hair side.
14. even smooth direct-light type LED backlight illumination light-distribution lens as described in claim 1, characterized in that the plane of incidence and
The face type of exit facet is by equationTo describe；Wherein, c is curved surface vertex curvature, and k is
Secondary aspherical coefficient, r are radial coordinate r2=x2+y2, z is axial coordinate, αiFor i term coefficient, i=1,2,3 ... is natural
Number；The Xiang Cizhong of an exit facet face type expression formula i >=6 at least term coefficient αiIt is not zero；The expression of plane of incidence face type
The Xiang Cizhong of a formula i >=4 at least term coefficient αiIt is not zero.
15. even smooth direct-light type LED backlight illumination light-distribution lens as claimed in claim 1 or 2, characterized in that the lens
Bottom surface or side be provided with positioning device.
16. even smooth direct-light type LED backlight illumination light-distribution lens as claimed in claim 15, characterized in that the positioning dress
It is set to positioning column, location hole, locating fastener or locating groove.
17. a kind of direct-light type LED backlight lighting system, characterized in that straight comprising the even light as described in one of claim 1 to 16
Light-distribution lens are used in light type LED backlight illumination.
18. a kind of TV, including backlight illuminating system, the backlight illuminating system include be arranged in pcb board LED light source and
It is mounted on the direct-type backlight LED lens that secondary light-distribution is realized above LED light source, characterized in that the lens are wanted for right
Even smooth direct-light type LED backlight illumination light-distribution lens described in asking one of 1 to 16.
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| CN201510080477.XA CN104806976B (en) | 2015-02-14 | 2015-02-14 | Even smooth direct-light type LED backlight illumination light-distribution lens, system and a kind of TV |
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| CN201510080477.XA CN104806976B (en) | 2015-02-14 | 2015-02-14 | Even smooth direct-light type LED backlight illumination light-distribution lens, system and a kind of TV |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465689A (en) * | 2016-01-05 | 2016-04-06 | 成都恒坤光电科技有限公司 | Backlight illumination structure, backlight illumination system and display device |
| CN106217776A (en) * | 2016-08-03 | 2016-12-14 | 乐视控股（北京）有限公司 | Fresnel Lenses, for manufacturing mould and the production method thereof of Fresnel Lenses |
| CN109387890A (en) * | 2017-08-07 | 2019-02-26 | 双莹科技股份有限公司 | Fresnel lens and method for manufacturing same |
| WO2019119710A1 (en) * | 2017-12-19 | 2019-06-27 | 深圳市利科达光电有限公司 | Lens structure for led television backlight source |
| CN108105644A (en) * | 2017-12-19 | 2018-06-01 | 深圳市利科达光电有限公司 | A kind of lens arrangement for LED television backlight |
| CN112578483B (en) * | 2019-09-30 | 2022-08-05 | 瑞识科技（深圳）有限公司 | VCSEL beam expanding lens and VCSEL device |
| CN112825414A (en) * | 2019-11-20 | 2021-05-21 | 瑞识科技（深圳）有限公司 | VCSEL laser device and manufacturing method thereof |
| CN112505967B (en) * | 2020-12-09 | 2023-06-02 | 宁波视睿迪光电有限公司 | Optical lens, light supplementing device and liquid crystal display module |
| WO2022242772A1 (en) * | 2021-05-20 | 2022-11-24 | 苏州欧普照明有限公司 | Light source module and lighting lamp |
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