CN103982855B - lens and light-emitting device - Google Patents
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- CN103982855B CN103982855B CN201310050243.1A CN201310050243A CN103982855B CN 103982855 B CN103982855 B CN 103982855B CN 201310050243 A CN201310050243 A CN 201310050243A CN 103982855 B CN103982855 B CN 103982855B
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Abstract
The invention provides a lens and a light-emitting device. The lens comprises a first lens body, a second lens body and a reflective film. The first lens body is provided with a bottom surface, an incident surface and a circumferential side surface, and the circumferential side surface is a first emergent surface; the incident surface is arranged in the middle, and the second lens body is connected with the top surface of the first lens body; the top surface is a total reflection surface which is in a smooth curved surface shape, and the circumferential side surface is a second emergent surface which is in a smooth curved surface shape; the reflective film is arranged at a central area of the total reflection surface and is used for covering hot spots. Incident light beams are divided into two parts to be emitted, a first part is emitted by the first emergent surface to form a plurality of first emergent light beams, and a second part is reflected by the second lens body, the reflective film and the total reflection surface and then is emitted by the second emergent surface to form a plurality of second emergent light beams; the plurality of first emergent light beams respectively tilt upwards relative to the bottom surface, and the plurality of second emergent light beams respectively tilt downwards relative to the bottom surface. The light-emitting device comprises the lens and an LED (Light Emitting Diode) plane light source.
Description
Technical field
The present invention relates to a kind of lens and light-emitting device, particularly one are applicable to ultra-thin large-size direct following formula
The lens of backlight module and light-emitting device.
Background technology
The backlight module of display panels is divided into side direction type backlight module and downward back according to light-source structure
Optical module.The structure of side direction type backlight module is that LED is placed in panel side, and utilizes the leaded light of wedge type
Plate and reflector plate by ray guidance upwards, then pass through the optical system of diffusion sheet and rhombus lens combination by light
Homogenization.Direct type backlight module is then to be placed directly within below diffuser plate by LED array, utilizes light straight
The mode penetrated passes through liquid crystal shutter.Two kinds of designs are respectively arranged with pluses and minuses, and in side light type back light module, backlight is subject to
It is limited to LED quantity, brightness and briliancy poor, but the thinner thickness of structure, it is adaptable to need slimming
Liquid crystal panel application, such as the monitor panel of small size or low cost.Direct type backlight module is because of can
Use the lamp source of more group, therefore higher brightness and briliancy can be provided, but relative operation temperature is higher,
It is usually used in large-size liquid crystal television the most in the past.But, prevailing along with full HD agitation, liquid crystal panel
Size, specification requirement more and more higher, such as colour gamut, brightness, contrast, angle of visibility etc..Adapting to
Under the trend that liquid crystal panel maximizes, direct-light type LED backlight module has become the developing focus of present stage.
Use LED as the challenge of direct-light-type backlight, essentially consist in conventional lenses and cause owing to shape is single
Light-emitting uniformity is poor, luminous efficiency is low, it is desirable to light mixing distance is big and there is the defects such as focus, it is difficult to be suitable for
To direct type backlight module, the most ultra-thin large-size direct backlight module.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, it is provided that a kind of uniform in light emission, and suitable
Lens and light-emitting device for ultra-thin large-size direct backlight module.
For achieving the above object, the present invention adopts the following technical scheme that
The present invention provides a kind of lens, including the first lens body, the second lens body and reflectance coating.Its
In the first lens body there is bottom surface and the incidence surface of smooth surface shape concaved by described bottom surface, week
Side surface is the first exiting surface, and described incidence surface is centrally located;Second lens body is bar shape, even
Being connected to the end face of described first lens body, the end face of this second lens body is the complete of smooth surface shape
Reflecting surface, all side surfaces are the second exiting surface of smooth surface shape, and the center of described fully reflecting surface is corresponding
Center in described incidence surface;Reflectance coating, is located at the central area of described fully reflecting surface, is used for covering heat
Point.The incident ray being injected described lens by described incidence surface is divided into two parts outgoing, and Part I is by institute
State the first exiting surface injection and form some the first emergent raies;Part II is through the second lens body, institute
Some the second outgoing are formed by described second exiting surface injection after stating reflectance coating and the reflection of described fully reflecting surface
Light, described some the first emergent raies are respectively relative to this bottom surface and are inclined upwardly 0 ° ~ 60 °, described
Some the second emergent ray is respectively relative to downward-sloping 0 ° ~ 80 ° of this bottom surface.
According to an embodiment of the present invention, described some the first emergent raies are respectively relative to this end
Face is inclined upwardly 0 ° ~ 10 °.
According to an embodiment of the present invention, described some the second emergent raies are respectively relative to this end
Face down inclination 0 ° ~ 20 °.
According to an embodiment of the present invention, in the bottom surface along described first lens body to end face side
To, the distance between the central point of described incidence surface to described first exiting surface each point tapers into.
According to an embodiment of the present invention, the top edge of described first lens body and described second
The top edge of lens body is on the cone cylinder sidewall as summit of the same center with described incidence surface.
According to an embodiment of the present invention, described cone cylinder is taper cone barrel, and its cone angle is 30 ° ~ 160
°, in the range of described Part II incident ray is distributed in this cone angle, described Part I incident ray
In the range of being distributed between the sidewall of described taper cone barrel and the bottom surface of described first lens body, preferably
It it is 80 ° ~ 130 °.
According to an embodiment of the present invention, described reflectance coating is in the throwing of the bottom surface of described first lens body
Shadow area is 1 ~ 10 times of the described incidence surface projected area in described first lens body bottom surface, preferably
It it is 2 ~ 5 times.
According to an embodiment of the present invention, described first lens body and the material of described second lens body
Matter is identical, and is structure as a whole.
According to an embodiment of the present invention, described first lens body has with described second lens body
Common centre symmetry line.
According to an embodiment of the present invention, described reflectance coating is aluminizer or silver-plated film.
According to an embodiment of the present invention, described fully reflecting surface is provided with several ripples, adjacent two ripples
Spike is intersected to form between stricture of vagina.
According to an embodiment of the present invention, described incidence surface is spherical shape.
According to an embodiment of the present invention, the circular in cross-section of described second exiting surface or ellipse;
The longitudinal section rectangular and trapezoidal shapes of described second exiting surface.
According to an embodiment of the present invention, described second exiting surface is relative to described second lens body
Centrage inwardly concaves or outwardly.
According to an embodiment of the present invention, top half and/or the latter half of described second exiting surface has
Have a plurality of annular corrugated.
The present invention provides a kind of light-emitting device, including lens and light source.Wherein said lens are institutes of the present invention
The lens stated, described light source is LED luminescence chip area source.
As shown from the above technical solution, advantages of the present invention and have the active effect that lens include two parts
Body, and there is fully reflecting surface.The incident ray entering lens is divided into two parts respectively from the first lens originally
First exiting surface of body side surface and the second exiting surface injection of the second lens body side.And two parts go out
Penetrate light alignment direction placed in the middle to tilt, i.e. the emergent ray by the first exiting surface is downward-sloping, and second goes out light
The emergent ray in face is inclined upwardly.Therefore after the lens luminous intensity distribution of the present invention, it is distributed in lens uniform light
Side.Particularly, the present invention is provided with reflectance coating owing to being easily formed hotspot location in fully reflecting surface central authorities,
Focus is avoided to occur, significant increase light-emitting uniformity, it is ensured that the quality of lens.The present invention comprehensively transports
The wave characteristic used up and particle properties, by incidence surface, the first exiting surface, the second exiting surface and complete
The modular design of reflecting surface, it is achieved that in the shortest coupling distance, it is provided that go out light uniformly, particularly suitable
In ultra-thin large-size direct backlight module.Meanwhile, in the lens of the present invention, uniformly go out light in guarantee
On the basis of, farthest decrease the refraction of light, order of reflection, and then decrease lens body pair
The loss of energy.
The lens of the present invention are particularly well-suited to area source, such as LED luminescence chip area source, therefore by this
The light-emitting device that bright lens and LED luminescence chip area source are constituted has uniform in light emission and energy equally
High feature.
By description of a preferred embodiment referring to the drawings, above-mentioned and other purpose of the present invention,
Feature and advantage will be apparent from.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of lens of the present invention;
Fig. 2 is the part A enlarged drawing in Fig. 1;
Fig. 3 is the enlarged drawing of the fully reflecting surface of part A in Fig. 1, represents in the fully reflecting surface in the present invention
The true form of centre part and the schematic diagram of design shape difference;
Fig. 4 a to Fig. 4 g represents the schematic diagram that the second exiting surface in the present invention is variously-shaped;
Fig. 5 represents the partial enlarged drawing of fully reflecting surface in the present invention;
Fig. 6 represents the luminous intensity distribution schematic diagram of the lens of the present invention;
Fig. 7 represents that the lens of the present invention simulate lines for the illumination of ultra-thin large-size direct backlight module
Figure;
Fig. 8 represents the lens of the present invention photograph when ultra-thin large-size direct backlight module directly over lens
Degree simulation raster pattern.
The specific embodiment of the present invention is described more fully below.It should be noted that, the embodiments described herein is only
For illustrating, it is not limited to the present invention.
Detailed description of the invention
See Fig. 1.The lens of the present invention, including first lens body the 1, second lens body 2 and reflection
Film 3.
First lens body 1 has bottom surface 10 end face relative with bottom surface 10 and connects end face and the end
All side surfaces in face.Middle position, bottom surface 10 is recessed to the first lens body 1 and forms smooth surface shape
The incidence surface 11 of shape, all side surfaces are the first exiting surface 12, and the first exiting surface 12 is smooth surface shape.
Preferably, incidence surface 11 is spherical shape, but is not limited.
Second lens body 2 is in bar shape, it is preferable that its radial dimension more than axial dimension 3~6 times,
Form flat cylinder body shape, the most oblate cylinder body shape.This second lens body 2 have end face,
The bottom surface 23 relative with end face and connect end face and all side surfaces of bottom surface 23.Second lens body 2
Bottom surface 23 area more than 1.5~5 times of top surface area of the first lens body 1, and the second lens this
The bottom surface 23 of body 2 is connected to the end face of the first lens body 1 in middle position, and the two can be by same material
One-body molded make, and there is common centre symmetry line.In the bottom surface 10 along the first lens body 1
To end face direction, the distance between central point O to first exiting surface 12 each point of incidence surface 11 gradually becomes
Little.
See Fig. 1 and Fig. 4 a to Fig. 4 g.The end face of the second lens body 2 is fully reflecting surface 21, is all-trans
Penetrating face 21 is free form surface, and light arrives this face and can be totally reflected.The center of fully reflecting surface 21 is corresponding
Center O in incidence surface 11.The shape of fully reflecting surface 21 can be similar to the circular cone that bus slightly concaves
Face, is not limited certainly, as long as other smooth surface shape that can form fully reflecting surface is also feasible.
All side surfaces of the second lens body 2 are the second exiting surface 22.The cross section of the second exiting surface 22 is (flat
Row is in the plane of bottom surface 23) rounded, oval or other smooth, curvilinear shape.Second exiting surface 22
Longitudinal section rectangular (seeing Fig. 1) or trapezoidal (seeing Fig. 4 a, Fig. 4 b);Or the second exiting surface
22 inwardly concave (seeing Fig. 4 d) relative to the centrage of the second lens body 2 or outwardly (see
Fig. 4 c);Further, the top half of the second exiting surface 22 has and a plurality of annular corrugated (sees figure
4f), or the latter half has a plurality of annular corrugated (seeing Fig. 4 g), or the second exiting surface 22 is overall
There is a plurality of annular corrugated (seeing Fig. 4 e).In a word, the shape of the second exiting surface 22 can be varied.
See Fig. 1, Fig. 2 and Fig. 3.Reflectance coating 3 is covered on fully reflecting surface 21 by modes such as Vacuum Depositions
Central area.The reflectance coating 3 projected area in the bottom surface 10 of the first lens body 1 is incidence surface 11
In the projected area of the first lens body 1 bottom surface 10 1 ~ 10 times.Preferably, reflectance coating 3 is first
The projected area of the bottom surface 10 of lens body 1 is the incidence surface 11 throwing in the first lens body 1 bottom surface 10
2 ~ 5 times of shadow area.Reflectance coating 3 can be aluminizer or silver-plated film or its there is the diaphragm of reflection function.
Being used for of reflectance coating 3 is to cover focus.
See Fig. 2 and Fig. 3.In design, in the fully reflecting surface central authorities (position that i.e. distance incidence surface 11 is nearest
Put) there is cusp M, 21 ' is fully reflecting surface shape in theory, as shown in double dot dash line in Fig. 3.Enter
Penetrate light to be reflected by this theoretic fully reflecting surface 21 ', as shown in phantom in Figure 3.But, due to thoroughly
The reasons such as mirror processing and Shooting Technique, have no idea to accomplish that practical structures keeps one with the ideal structure of design
Causing, the actual lens processed, at fully reflecting surface, central authorities are curved, i.e. actual fully reflecting surface 21
Be shaped as arc.Therefore, according to the fully reflecting surface shape of Design Theory, all of incident ray all can
It is reflected, and is difficult to through fully reflecting surface;In practical structures, small fraction of incident light can be there is,
The incident illumination of particularly LED central authorities is through fully reflecting surface, as shown in fine line in Fig. 3, and LED central authorities
Light intensity is maximum, thus the light of this fractional transmission defines central authorities' focus.At fully reflecting surface in the present invention
This middle section arranges reflectance coating 3, thus has covered focus.
See Fig. 6.AB is LED luminescence chip area source, the light incident illumination that it sends, incident ray
Being divided into two parts outgoing after being injected lens by incidence surface 11, Part I is penetrated shape by the first exiting surface 12
Become some the first emergent raies;Part II is through the second lens body 2, reflectance coating 3 and fully reflecting surface
Penetrated by the second exiting surface 22 after 21 reflections and form some the second emergent raies.The most some first
Emergent ray is respectively relative to this bottom surface 10 and is inclined upwardly 0 ° ~ 60 °, is preferably, and some first go out
Penetrate light to be respectively relative to this bottom surface 10 and be inclined upwardly 0 ° ~ 10 °, more preferably, 0 ° ~ 5 °.
Some the second emergent ray is respectively relative to downward-sloping 0 ° ~ 80 ° of this bottom surface 10, is preferably, if
Dry bar the second emergent ray is respectively relative to downward-sloping 0 ° ~ 20 ° of this bottom surface 10, more preferably,
0°~10°。
See Fig. 6.The top edge of the first lens body 1 exists with the top edge of the second lens body 2
On the same center O with the incidence surface 11 cone cylinder sidewall as summit, it is preferable that cone cylinder is taper cone barrel,
And its cone angle beta is 30 ° ~ 160 °, preferred cone angle beta is 80 ° ~ 130 °, Part II incident illumination
In the range of line is distributed in this cone angle beta, Part I incident ray is distributed in the sidewall of taper cone barrel and first saturating
In the range of between the bottom surface 10 of mirror body 1.
The light-emitting device of the present invention, lens and the LED with certain light-emitting area including the present invention are luminous
Chip area source.
Referring back to Fig. 6.LED luminescence chip area source AB has certain area.Use boundary light
Line principle, designs lens for expansion light source.The light sent from B, is totally reflected through fully reflecting surface 21
The most parallel, parallel after the first exiting surface 12 refraction;The light sent from O is complete through fully reflecting surface 21
After reflection and the refraction of the second exiting surface 22, penetrate with the angle of-θ 1, after the first exiting surface 12 refraction
Penetrate with the angle of+θ 3;The light sent from A, through fully reflecting surface 21 total reflection and the second exiting surface
After 22 refractions, penetrate with the angle of-θ 2, penetrate with the angle of+θ 4 after the first exiting surface 12 refraction.
θ 1, θ 2, θ 3 and θ 4 big I by LED luminescence chip size, the first exiting surface 12, lens
Fully reflecting surface 21 and the second exiting surface 22 specifically determine.Design for expansion light source so that all of
Light is all after lens, side sends.
See Fig. 5 and Fig. 6.The actual fully reflecting surface 21 processed objectively is unlikely to be one definitely
Smooth perfect curved surface, as shown in Figure 5.Fully reflecting surface 21 is provided with several ripples, adjacent two ripples
Between intersect to form spike, this be processing fully reflecting surface 21 time formed knife mark, these knife marks define one
Individual similar many seam diffraction curved surface gratings, d is grating constant.Whole curved surface is divided into N number of by grating constant
Part, each part becomes a single seam Fraunhofer diffraction.Owing to being relevant between single slit diffraction field,
Therefore the complex amplitude of many seam fraunhofers is the superposition of all single seams.The determination of grating constant is by designing song
Line amount of feeding of cutter when this tangent line put and cutting determines.If P be before lens a bit, at P point
Light intensity be:
I0=|A|2I0=|A|2It is singly to be sewn on P0The light intensity that point produces.Above formula contains two factors: single
Seam diffraction factorWith the multiple-beam interference factorIllustrate that stitch fraunhofer spreads out more
Penetrate is diffraction and two kinds of coefficient results of effect of interference.Factor of diffraction by a single slit and the character of single seam itself
Relevant, wide so that its amplitude caused and phase place change including seam.And multiple-beam interference Factor Source is in narrow
The periodic arrangement of seam.Therefore, the intensity distributions of their Fraunhofer diffraction pattern, as long as single
The diffraction factor of diffraction ring is obtained, then is multiplied by the multiple-beam interference factor and can be obtained by.
The lens of the present invention are that the side of the wave characteristic design of a utilization light goes out formula secondary lens, these lens
It is particularly well-suited to ultra-thin large-size direct backlight module, can be formed uniform under the shortest coupling distance
Shadow surface.
Such as: the lens of the present invention are used for ultra-thin large-size direct backlight module, wherein lens height
Vertical dimension between the top end face of bottom surface 10 to the second lens body 2 of the i.e. first lens body 1 is
7.5mm, the vertical dimension of lens end face (referring to the second lens body 2 end face) to diffuser plate lower surface,
I.e. coupling distance is 5.5mm, and the gross thickness of the most ultra-thin large-size direct backlight module is 13mm.
The light that Lambertion LED luminescence chip area source sends, its spatial light intensity is distributed as:
Iθ=INcosθ
INFor forward light-emitting area in the luminous intensity of normal direction, i.e. at largest light intensity.Its brightness is respectively
Individual direction is identical, and the luminous flux sent in the spatial angle range that plane angular aperture is U is:
Through COMPREHENSIVE CALCULATING Fraunhofer diffraction and total reflection luminous intensity distribution, LED luminescence chip area source send
Cone angle beta is that the light in the range of the cone cylinder of 124 ° reflects through fully reflecting surface 21, by the second exiting surface 22
Outgoing;Remaining incident ray is penetrated by the first exiting surface 12.Adding tool radius in man-hour is
0.1mm~0.5mm, rotating speed is 1500rpm~2000rpm.Analog result is shown in such as Fig. 7 and Fig. 8,
The uniformity is more than 80%.
See Fig. 7 and Fig. 8.Fig. 7 and Fig. 8 is the illumination simulation design sketch of above-mentioned example.In Fig. 7,
Light color lines represent horizontal direction illumination, and dark strokes represents vertical direction illumination.Can from Fig. 7
Go out: no matter be horizontally oriented uniformity of illuminance (minimal illumination value and the maximal illumination value being also vertically oriented
Ratio) both greater than 80%.Fig. 8 represents the diffuser plate following table at ultra-thin large-size direct backlight module
The illumination simulation raster pattern in face.The area of left side figure is roughly the same with the area of diffuser plate, uses gray scale in figure
Represent the distribution of its illumination;The figure on the right represents the brightness value that different gray scale is corresponding.Whole Fig. 8 is straight
Demonstrate that the Illumination Distribution at diffuser plate lower surface is highly uniform with seeing.
Although exemplary embodiment describing the present invention with reference to several, it is to be understood that, term used is
Illustrate and exemplary and nonrestrictive term.Owing to the present invention can be embodied as in a variety of forms
Without departing from invention spirit or essence, it should therefore be appreciated that above-described embodiment be not limited to any aforesaid carefully
Joint, and should explain widely in the spirit and scope that appended claims are limited, therefore fall into right
Whole changes and remodeling in requirement or its equivalent scope all should be appended claims and contained.
Claims (19)
1. lens, it is characterised in that including:
First lens body (1), it has bottom surface (10) and by putting down that described bottom surface (10) concave
The incidence surface (11) of sliding curve form, all side surfaces are the first exiting surface (12), and described incidence surface
(11) it is centrally located;
Second lens body (2), in bar shape, is connected to the end face of described first lens body (1),
The fully reflecting surface that end face is smooth surface shape (21) of this second lens body (2), all side surfaces are
Second exiting surface (22) of smooth surface shape, the center of described fully reflecting surface (21) is corresponding to described
The center (O) of incidence surface (11);
Reflectance coating (3), is only located at the central area of described fully reflecting surface (21), is used for covering focus,
And it is not provided with reflectance coating (3) in other regions except described central area of described fully reflecting surface (21);
Injected the incident ray of described lens by described incidence surface (11) and be divided into two parts outgoing, first
Divide and formed some the first emergent raies by the injection of described first exiting surface (12);Part II is through second
By described second after lens body (2), described reflectance coating (3) and described fully reflecting surface (21) reflection
Exiting surface (22) injection forms some the second emergent raies, and described some the first emergent raies are respectively
Being inclined upwardly 0 °~60 ° relative to this bottom surface (10), described some the second emergent raies are the most relatively
In this bottom surface (10) downward-sloping 0 °~80 °.
2. lens as claimed in claim 1, it is characterised in that described some the first emergent lights
Line is respectively relative to this bottom surface (10) and is inclined upwardly 0 °~10 °.
3. lens as claimed in claim 1, it is characterised in that described some the second emergent lights
Line is respectively relative to downward-sloping 0 °~20 ° of this bottom surface (10).
4. lens as claimed in claim 1, it is characterised in that along described first lens originally
The bottom surface (10) of body (1) is to end face direction, and the central point (O) of described incidence surface (11) arrives
Distance between described first exiting surface (12) each point tapers into.
5. lens as claimed in claim 4, it is characterised in that described first lens body (1)
The top edge of top edge and described second lens body (2) same with described incidence surface
(11) center (O) is on the cone cylinder sidewall on summit.
6. lens as claimed in claim 5, it is characterised in that described cone cylinder is taper cone barrel, and
Its cone angle (β) is 30 °~160 °, and described Part II incident ray is distributed in this cone angle (β)
In the range of, described Part I incident ray is distributed in the sidewall of described taper cone barrel and described first lens
In the range of between the bottom surface (10) of body (1).
7. lens as claimed in claim 6, it is characterised in that described cone angle (β) is 80 °
~130 °.
8. the lens as described in any one in claim 1-7, it is characterised in that described reflectance coating (3)
Projected area in the bottom surface (10) of described first lens body (1) is that described incidence surface (11) is in institute
State 1~10 times of projected area of the first lens body (1) bottom surface (10).
9. lens as claimed in claim 8, it is characterised in that described reflectance coating (3) is described the
The projected area of the bottom surface (10) of one lens body (1) is described incidence surface (11) described first saturating
2~5 times of the projected area of mirror body (1) bottom surface (10).
10. lens as claimed in claim 1, it is characterised in that described first lens body (1) with
The material of described second lens body (2) is identical, and is structure as a whole.
11. lens as claimed in claim 1, it is characterised in that described first lens body (1) with
Described second lens body (2) has common centre symmetry line.
12. lens as claimed in claim 1, it is characterised in that described reflectance coating (3) is aluminizer
Or silver-plated film.
13. lens as claimed in claim 1, it is characterised in that described fully reflecting surface (21) is provided with
Several ripples, intersect to form spike between adjacent two ripples.
14. lens as claimed in claim 1, it is characterised in that described incidence surface (11) is sphere
Shape.
15. lens as claimed in claim 1, it is characterised in that described second exiting surface (22)
Circular in cross-section or ellipse.
16. lens as claimed in claim 1, it is characterised in that described second exiting surface (22)
Longitudinal section rectangular and trapezoidal shapes.
17. lens as claimed in claim 1, it is characterised in that described second exiting surface (22) phase
Centrage for described second lens body (2) inwardly concaves or outwardly.
18. lens as claimed in claim 1, it is characterised in that described second exiting surface (22)
Top half and/or the latter half have a plurality of annular corrugated.
19. 1 kinds of light-emitting devices, including lens and light source, it is characterised in that described lens are such as right
Requiring the lens according to any one of 1-18, described light source is LED luminescence chip area source.
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CN104964246A (en) * | 2015-05-22 | 2015-10-07 | 上海理鑫光学科技有限公司 | Optical lens capable of generating 360-degree annular collimated beams |
CN106681052B (en) * | 2016-11-16 | 2019-11-15 | 京东方科技集团股份有限公司 | A kind of backlight module and display device |
JP6316494B1 (en) * | 2017-09-26 | 2018-04-25 | 株式会社エンプラス | Surface light source device and display device |
US10985145B1 (en) * | 2020-01-06 | 2021-04-20 | Coretronic Corporation | Light source module |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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EP1255132A1 (en) * | 2001-05-04 | 2002-11-06 | LumiLeds Lighting U.S., LLC | Lens for light-emitting devices |
CN2829098Y (en) * | 2005-03-04 | 2006-10-18 | 东贝光电科技股份有限公司 | Improved structure of side solid semiconductor light-emitting element |
TW200827617A (en) * | 2006-12-20 | 2008-07-01 | Ind Tech Res Inst | Lens cap and light emitting diode package using the same |
CN102102847A (en) * | 2009-12-21 | 2011-06-22 | 金芃 | LED (light emitting diode) area light source lens |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
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TWI346820B (en) * | 2006-11-06 | 2011-08-11 | Au Optronics Corp | Lens and backlight module of display utilizing the same |
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2013
- 2013-02-08 CN CN201310050243.1A patent/CN103982855B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1255132A1 (en) * | 2001-05-04 | 2002-11-06 | LumiLeds Lighting U.S., LLC | Lens for light-emitting devices |
CN2829098Y (en) * | 2005-03-04 | 2006-10-18 | 东贝光电科技股份有限公司 | Improved structure of side solid semiconductor light-emitting element |
TW200827617A (en) * | 2006-12-20 | 2008-07-01 | Ind Tech Res Inst | Lens cap and light emitting diode package using the same |
CN102102847A (en) * | 2009-12-21 | 2011-06-22 | 金芃 | LED (light emitting diode) area light source lens |
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CN103982855A (en) | 2014-08-13 |
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Effective date of registration: 20161221 Address after: China Hung Hom Kowloon Hongkong Applicant after: Hongkang Univ. of Science and Engineering Address before: Kowloon, Hongkong Special Administrative Region Applicant before: Hongkang Univ. of Science and Engineering Applicant before: Beijing-Hongkong Li great Science and Technology Ltd. |