CN103982855A - Lens and light-emitting device - Google Patents
Lens and light-emitting device Download PDFInfo
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- CN103982855A CN103982855A CN201310050243.1A CN201310050243A CN103982855A CN 103982855 A CN103982855 A CN 103982855A CN 201310050243 A CN201310050243 A CN 201310050243A CN 103982855 A CN103982855 A CN 103982855A
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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 a kind of lens and light-emitting device that is applicable to ultra-thin large-size direct backlight module.
Background technology
The backlight module of display panels can be divided into side direction type backlight module and direct type backlight module according to light-source structure.The structure of side direction type backlight module is that LED is placed in to panel side, and utilizes the LGP of wedge type and reflector plate that ray guidance is made progress, then the optical system that sees through diffusion sheet and rhombus lens combination is by equalizing light rays.Direct type backlight module is that LED array is directly placed in to diffuser plate below, utilizes the mode of light direct projection to pass through liquid crystal shutter.Two kinds of designs respectively have pluses and minuses, and in side light type back light module, backlight is limited to LED quantity, and brightness and briliancy are poor, but the thinner thickness of structure is applicable to need the liquid crystal panel application of slimming, as small size or monitor panel cheaply.Direct type backlight module, because adopting the lamp source of more group, therefore can provide higher brightness and briliancy, but relative operating temperature is higher, so used is for large scale liquid crystal TV.Yet, prevailing along with full HD agitation, size, the specification requirement of liquid crystal panel are also more and more higher, as colour gamut, brightness, contrast, angle of visibility etc.Adapting under the trend of liquid crystal panel maximization, direct-light type LED backlight module has become the developing focus of present stage.Adopt LED as the challenge of direct-light-type backlight, mainly be that conventional lenses causes because shape is single that light-emitting uniformity is poor, luminous efficiency is low, requirement light mixing distance is large and have the defects such as focus, is difficult to be adapted to direct type backlight module, particularly ultra-thin large-size direct backlight module.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, provide a kind of bright dipping even, and be applicable to lens and the light-emitting device of ultra-thin large-size direct backlight module.
For achieving the above object, the present invention adopts following technical scheme:
The invention provides a kind of lens, comprise first lens body, the second lens body and reflectance coating.Wherein first lens body has bottom surface and the incidence surface of the smooth surface shape that concaved by described bottom surface, and all side surfaces are the first exiting surface, and described incidence surface arranges between two parties; The second lens body is bar shape, be connected in the end face of described first lens body, the end face of this second lens body is the fully reflecting surface of smooth surface shape, and all side surfaces are the second exiting surface of smooth surface shape, and the center of described fully reflecting surface is corresponding to the center of described incidence surface; Reflectance coating, is located at the central area of described fully reflecting surface, for covering focus.The incident ray of being injected described lens by described incidence surface is divided into two parts outgoing, and first is penetrated and formed some the first emergent raies by described the first exiting surface; Second portion is penetrated and is formed some the second emergent raies by described the second exiting surface after the second lens body, described reflectance coating and the reflection of described fully reflecting surface, described some the first emergent raies are inclined upwardly 0 ° ~ 60 ° with respect to this bottom surface respectively, with respect to this bottom surface downward-sloping 0 ° ~ 80 ° respectively of described some the second emergent raies.
According to an embodiment of the present invention, described some the first emergent raies are inclined upwardly 0 ° ~ 10 ° with respect to this bottom surface respectively.
According to an embodiment of the present invention, described some the second emergent raies are with respect to this bottom surface downward-sloping 0 ° ~ 20 ° respectively.
According to an embodiment of the present invention, in the bottom surface along described first lens body, to end face direction, the central point of described incidence surface diminishes gradually to the distance between described the first exiting surface each point.
According to an embodiment of the present invention, on the cone cylinder sidewall that the top edge of the top edge of described first lens body and described the second lens body is summit at same center of take 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 °, described second portion incident ray is distributed within the scope of this cone angle, described first incident ray is distributed in the scope between the sidewall of described taper cone barrel and the bottom surface of described first lens body, is preferably 80 ° ~ 130 °.
According to an embodiment of the present invention, the projected area of described reflectance coating in the bottom surface of described first lens body is described incidence surface 1 ~ 10 times of the projected area of described first lens body bottom surface, is preferably 2 ~ 5 times.
According to an embodiment of the present invention, described first lens body is identical with the material of described the second lens body, and is structure as a whole.
According to an embodiment of the present invention, described first lens body and described the second lens body have 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, between adjacent two ripples, intersects to form spike.
According to an embodiment of the present invention, described incidence surface is spherical shape.
According to an embodiment of the present invention, the cross section of described the second exiting surface is rounded or oval; The longitudinal section of described the second exiting surface is rectangular or trapezoidal.
According to an embodiment of the present invention, described the second exiting surface inwardly concaves with respect to the center line of described the second lens body or is outwardly.
According to an embodiment of the present invention, the first half of described the second exiting surface and/or the latter half have many annular corrugated.
The invention provides a kind of light-emitting device, comprise lens and light source.Wherein said lens are lens of the present invention, and described light source is LED luminescence chip area source.
As shown from the above technical solution, advantage of the present invention and good effect are: lens comprise two parts body, and have fully reflecting surface.The incident ray that enters lens is divided into two parts and from the first exiting surface of first lens body side and the second exiting surface of the second lens body side, penetrates respectively.And two parts emergent ray tilts to direction placed in the middle, downward-sloping by the emergent ray of the first exiting surface, the emergent ray of the second exiting surface is inclined upwardly.Therefore after lens luminous intensity distribution of the present invention, light is distributed in lens side equably.Particularly, in the present invention, owing to easily forming hotspot location in fully reflecting surface central authorities, be provided with reflectance coating, avoid focus to occur, greatly promoted light-emitting uniformity, guaranteed the quality of lens.The wave characteristic of integrated use light of the present invention and particle properties, by the Combination Design of incidence surface, the first exiting surface, the second exiting surface and fully reflecting surface, realized in very short coupling distance, uniform bright dipping is provided, be specially adapted to ultra-thin large-size direct backlight module.Meanwhile, in lens of the present invention, on the basis of the even bright dipping of assurance, farthest reduced refraction, the order of reflection of light, and then reduced the loss of lens body to energy.
Lens of the present invention are specially adapted to area source, and as LED luminescence chip area source, the light-emitting device therefore consisting of lens of the present invention and LED luminescence chip area source has the feature that bright dipping is even and energy is high equally.
By referring to accompanying drawing description of a preferred embodiment, above-mentioned and other objects, features and advantages of the present invention will be more obvious.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of lens of the present invention;
Fig. 2 is the A part enlarged drawing in Fig. 1;
Fig. 3 is the enlarged drawing of the fully reflecting surface of A part in Fig. 1, represents the true form of fully reflecting surface middle body and the schematic diagram of design shape difference in the present invention;
Fig. 4 a to Fig. 4 g represents the schematic diagram of the various shapes of the second exiting surface in the present invention;
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 lens of the present invention;
Fig. 7 represents that lens of the present invention are for the illumination simulation string diagram of ultra-thin large-size direct backlight module;
Illumination simulation raster pattern when Fig. 8 represents lens of the present invention for ultra-thin large-size direct backlight module directly over lens.
To describe specific embodiments of the invention in detail below.It should be noted that the embodiments described herein, only for illustrating, is not limited to the present invention.
The specific embodiment
Referring to Fig. 1.Lens of the present invention, comprise first lens body 1, the second lens body 2 and reflectance coating 3.
First lens body 1 has bottom surface 10, the end face relative with bottom surface 10 and all side surfaces that connect end face and bottom surface.Bottom surface 10 middle positions are recessed and form the incidence surface 11 of smooth surface shape to first lens body 1, and all side surfaces are that the first exiting surface 12, the first exiting surfaces 12 are smooth surface shape.Preferably, incidence surface 11 is spherical shape, but not as limit.
The second lens body 2 is bar shape, and preferably, its radial dimension is greater than 3～6 times of axial dimensions, forms flat cylinder body shape, is particularly preferably oblate cylinder body shape.This second lens body 2 has end face, the bottom surface 23 relative with end face and all side surfaces that connect end face and bottom surface 23.Bottom surface 23 areas of the second lens body 2 are greater than 1.5～5 times of top surface area of first lens body 1, and the bottom surface 23 of the second lens body 2 is connected in the end face of first lens body 1 at middle position, the two can be made by same material is one-body molded, and has common centre symmetry line.In the bottom surface 10 along first lens body 1, to end face direction, the central point O of incidence surface 11 diminishes gradually to the distance between the first exiting surface 12 each points.
Referring to Fig. 1 and Fig. 4 a to Fig. 4 g.The end face of the second lens body 2 is fully reflecting surface 21, and fully reflecting surface 21 is free form surface, and light arrives this face, and total reflection can occur.Fully reflecting surface 21 center is corresponding to the center O of incidence surface 11.The shape of fully reflecting surface 21 can be similar to the taper seat that bus slightly concaves, and certainly not as limit, as long as can form other smooth surface shape of 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 (plane that is parallel to bottom surface 23) is rounded, oval or other smooth, curvilinear shape.The longitudinal section rectangular (referring to Fig. 1) of the second exiting surface 22 or trapezoidal (referring to Fig. 4 a, Fig. 4 b); Or the second exiting surface 22 inwardly concaves (referring to Fig. 4 d) or outwardly (referring to Fig. 4 c) with respect to the center line of the second lens body 2; Further, the first half of the second exiting surface 22 has many annular corrugated (referring to Fig. 4 f), or the latter half has many annular corrugated (referring to Fig. 4 g), or the second exiting surface 22 integral body have many annular corrugated (referring to Fig. 4 e).In a word, the shape of the second exiting surface 22 can be varied.
Referring to Fig. 1, Fig. 2 and Fig. 3.Reflectance coating 3 is covered on the central area of fully reflecting surface 21 by modes such as Vacuum Depositions.The projected area of reflectance coating 3 in the bottom surface 10 of first lens body 1 is incidence surface 11 1 ~ 10 times of the projected area of first lens body 1 bottom surface 10.Preferably, the projected area of reflectance coating 3 in the bottom surface 10 of first lens body 1 is incidence surface 11 2 ~ 5 times of the projected area of first lens body 1 bottom surface 10.Reflectance coating 3 can be that aluminizer or silver-plated film or its have the diaphragm of reflection function.Reflectance coating 3 for being to cover focus.
Referring to Fig. 2 and Fig. 3.In design, in fully reflecting surface central authorities (i.e. the position nearest apart from incidence surface 11), there is cusp M, in theory 21 ' be fully reflecting surface shape, as shown in double dot dash line in Fig. 3.Incident ray is by this theoretic fully reflecting surface 21 ' reflection, as shown in phantom in Figure 3.But, due to reasons such as lens processing and Shooting Techniques, have no idea to accomplish that the ideal structure of practical structures and design is consistent, the actual lens that process, curved in fully reflecting surface central authorities, the fully reflecting surface 21 of reality is shaped as arc.Therefore, according to the fully reflecting surface shape of Theoretical Design, all incident raies all can be reflected away, and are difficult for through fully reflecting surface; In practical structures, can have sub-fraction incident light, particularly the incident light of LED central authorities sees through fully reflecting surface, and as shown in fine line in Fig. 3, LED central authorities light intensity is maximum, thereby the light of this part transmission has formed central focus.This middle section at fully reflecting surface in the present invention arranges reflectance coating 3, thereby has covered focus.
Referring to Fig. 6.AB is LED luminescence chip area source, the light incident light that it sends, and incident ray is divided into two parts outgoing after injecting lens by incidence surface 11, and first is penetrated and is formed some the first emergent raies by the first exiting surface 12; Second portion is penetrated and is formed some the second emergent raies by the second exiting surface 22 after the second lens body 2, reflectance coating 3 and fully reflecting surface 21 reflections.Wherein some the first emergent raies are inclined upwardly 0 ° ~ 60 ° with respect to this bottom surface 10 respectively, are preferably, and some the first emergent raies are inclined upwardly 0 ° ~ 10 ° with respect to this bottom surface 10 respectively, more preferably, and 0 ° ~ 5 °.With respect to this bottom surface 10 downward-sloping 0 ° ~ 80 ° respectively of some the second emergent raies, are preferably, with respect to this bottom surface 10 downward-sloping 0 ° ~ 20 ° respectively of some the second emergent raies, more preferably, 0 ° ~ 10 °.
Referring to Fig. 6.On the cone cylinder sidewall that the top edge of the top edge of first lens body 1 and the second lens body 2 is summit in same center O of take incidence surface 11, preferably, cone cylinder is taper cone barrel, and its cone angle beta is 30 ° ~ 160 °, preferred cone angle beta is 80 ° ~ 130 °, second portion incident ray is distributed within the scope of this cone angle beta, and first's incident ray is distributed in the scope between the sidewall of taper cone barrel and the bottom surface 10 of first lens body 1.
Light-emitting device of the present invention, comprises lens of the present invention and the LED luminescence chip area source with certain light-emitting area.
Again referring to Fig. 6.LED luminescence chip area source AB has certain area.Use boundary rays principle, for expansion light source design lens.The light sending from B, parallel after fully reflecting surface 21 total reflections, parallel after the first exiting surface 12 refractions; The light sending from O, after fully reflecting surface 21 total reflections and the refraction of the second exiting surface 22, penetrates with the angle of-θ 1, and the angle with+θ 3 after the first exiting surface 12 refractions penetrates; The light sending from A, after fully reflecting surface 21 total reflections and the refraction of the second exiting surface 22, penetrates with the angle of-θ 2, and the angle with+θ 4 after the first exiting surface 12 refractions penetrates.The large I of θ 1, θ 2, θ 3 and θ 4 is specifically determined by LED luminescence chip size, the first exiting surface 12, lens fully reflecting surface 21 and the second exiting surface 22.For the design of expansion light source, making all light is all after lens, by side, is sent.
Referring to Fig. 5 and Fig. 6.The actual fully reflecting surface processing 21 can not be objectively a definitely level and smooth perfectly curved surface, as shown in Figure 5.Fully reflecting surface 21 is provided with several ripples, between adjacent two ripples, intersects to form spike, the knife mark that this forms while being processing fully reflecting surface 21, and these knife marks have formed similar many seam diffraction curved surface gratings, and d is grating constant.Whole curved surface is divided into N part by grating constant, and each part becomes a single seam Fraunhofer diffraction.Owing to being concerned with between single slit diffraction field, therefore the complex amplitude of many seam fraunhofers is stacks of all single seams.Determining by design curve amount of feeding of cutter when the tangent line of this point and the cutting of grating constant determined.If P is a bit before lens, the light intensity of ordering at P is:
I
0=| A|
2i
0=| A|
2singly to be sewn on P
0the light intensity that point produces.Two factors in above formula, have been comprised: factor of diffraction by a single slit
with the multiple-beam interference factor
illustrated that many seams Fraunhofer diffraction is diffraction and interferes two kinds of coefficient results of effect.Factor of diffraction by a single slit is relevant with the character of single seam itself, comprises that seam is wide so that it causes amplitude and phase place change.And the multiple-beam interference factor derives from the periodic arrangement of slit.Therefore, the intensity distributions of their Fraunhofer diffraction pattern, as long as the diffraction factor of single diffraction ring is obtained, then is multiplied by the multiple-beam interference factor and just can have obtained.
Lens of the present invention are that the side of the wave characteristic design of a utilization light goes out formula secondary lens, and these lens are specially adapted to ultra-thin large-size direct backlight module, can under very short coupling distance, form uniform shadow surface.
For example: lens of the present invention are used for to ultra-thin large-size direct backlight module, wherein lens height is that the vertical range between the top end face of bottom surface 10 to second lens body 2 of first lens body 1 is 7.5mm, lens end face (referring to the second lens body 2 end faces) is to the vertical range of diffuser plate lower surface, be that coupling distance is 5.5mm, the gross thickness of 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:
I
θ=I
Ncosθ
I
nfor the luminous intensity of forward light-emitting area in normal direction, i.e. largest light intensity place.Its brightness is identical in all directions, and the luminous flux sending within the scope of the solid angle that is U in plane angular aperture is:
Through COMPREHENSIVE CALCULATING Fraunhofer diffraction and total reflection luminous intensity distribution, what LED luminescence chip area source sent is that light within the scope of the cone cylinder of 124 ° is through fully reflecting surface 21 reflections, by the second exiting surface 22 outgoing in cone angle beta; All the other incident raies are penetrated by the first exiting surface 12.Adding man-hour tool radius is 0.1mm～0.5mm, and rotating speed is 1500rpm～2000rpm.Analog result is shown in that the uniformity is greater than 80% as Fig. 7 and Fig. 8.
Referring to Fig. 7 and Fig. 8.Fig. 7 and Fig. 8 are the illumination simulate effect figure of above-mentioned example.In Fig. 7, light lines represent horizontal direction illumination, and dark strokes represents vertical direction illumination.As can be seen from Figure 7: no matter be that horizontal direction or the uniformity of illuminance of vertical direction (ratio of minimal illumination value and maximal illumination value) are all greater than 80%.Fig. 8 is illustrated in the illumination simulation raster pattern of the diffuser plate lower surface of ultra-thin large-size direct backlight module.The area of left side figure and the area of diffuser plate are roughly suitable, represent the distribution of its illumination in figure by gray scale; The figure on the right represents the brightness value that different gray scales are corresponding.Whole Fig. 8 demonstrates in the Illumination Distribution of diffuser plate lower surface very even intuitively.
Although described the present invention with reference to several exemplary embodiments, should be appreciated that term used is explanation and exemplary and nonrestrictive term.The spirit or the essence that because the present invention can specifically implement in a variety of forms, do not depart from invention, so be to be understood that, above-described embodiment is not limited to any aforesaid details, and explain widely in the spirit and scope that should limit in the claim of enclosing, therefore fall into whole variations in claim or its equivalent scope and remodeling and all should be the claim of enclosing and contain.
Claims (19)
1. lens, is characterized in that, comprising:
First lens body (1), it has bottom surface (10) and the incidence surface (11) of the smooth surface shape that concaved by described bottom surface (10), and all side surfaces are the first exiting surface (12), and described incidence surface (11) arranges between two parties;
The second lens body (2), be bar shape, be connected in the end face of described first lens body (1), the end face of this second lens body (2) is the fully reflecting surface (21) of smooth surface shape, week, side surface was second exiting surface (22) of smooth surface shape, and the center of described fully reflecting surface (21) is corresponding to the center (O) of described incidence surface (11);
Reflectance coating (3), is located at the central area of described fully reflecting surface (21), for covering focus;
The incident ray of being injected described lens by described incidence surface (11) is divided into two parts outgoing, and first is penetrated and formed some the first emergent raies by described the first exiting surface (12); Second portion is penetrated and is formed some the second emergent raies by described the second exiting surface (22) after the second lens body (2), described reflectance coating (3) and described fully reflecting surface (21) reflection, described some the first emergent raies are inclined upwardly 0 ° ~ 60 ° with respect to this bottom surface (10) respectively, with respect to this bottom surface (10) downward-sloping 0 ° ~ 80 ° respectively of described some the second emergent raies.
2. lens as claimed in claim 1, is characterized in that, described some the first emergent raies are inclined upwardly 0 ° ~ 10 ° with respect to this bottom surface (10) respectively.
3. lens as claimed in claim 1, is characterized in that, with respect to this bottom surface (10) downward-sloping 0 ° ~ 20 ° respectively of described some the second emergent raies.
4. lens as claimed in claim 1, it is characterized in that, in the bottom surface (10) along described first lens body (1), to end face direction, the central point (O) of described incidence surface (11) diminishes gradually to the distance between described the first exiting surface (12) each point.
5. lens as claimed in claim 4, is characterized in that, on the cone cylinder sidewall that the top edge of the top edge of described first lens body (1) and described the second lens body (2) is summit at same center (O) of take described incidence surface (11).
6. lens as claimed in claim 5, it is characterized in that, described cone cylinder is taper cone barrel, and its cone angle (β) is 30 ° ~ 160 °, described second portion incident ray is distributed in this cone angle (β) scope, and described first incident ray is distributed in the scope between the sidewall of described taper cone barrel and the bottom surface (10) of described first lens body (1).
7. lens as claimed in claim 6, is characterized in that, described cone angle (β) is 80 ° ~ 130 °.
8. lens as described in any one in claim 1-7, it is characterized in that, the projected area of described reflectance coating (3) in the bottom surface (10) of described first lens body (1) is described incidence surface (11) 1 ~ 10 times of the projected area of described first lens body (1) bottom surface (10).
9. lens as claimed in claim 8, it is characterized in that, the projected area of described reflectance coating (3) in the bottom surface (10) of described first lens body (1) is described incidence surface (11) 2 ~ 5 times of the projected area of described first lens body (1) bottom surface (10).
10. lens as claimed in claim 1, is characterized in that, described first lens body (1) is identical with the material of described the second lens body (2), and is structure as a whole.
11. lens as claimed in claim 1, is characterized in that, described first lens body (1) has common centre symmetry line with described the second lens body (2).
12. lens as claimed in claim 1, is characterized in that, described reflectance coating (3) is aluminizer or silver-plated film.
13. lens as claimed in claim 1, is characterized in that, described fully reflecting surface (21) is provided with several ripples, between adjacent two ripples, intersect to form spike.
14. lens as claimed in claim 1, is characterized in that, described incidence surface (11) is spherical shape.
15. lens as claimed in claim 1, is characterized in that, the cross section of described the second exiting surface (22) is rounded or oval.
16. lens as claimed in claim 1, is characterized in that, the longitudinal section of described the second exiting surface (22) is rectangular or trapezoidal.
17. lens as claimed in claim 1, is characterized in that, described the second exiting surface (22) inwardly concaves with respect to the center line of described the second lens body (2) or be outwardly.
18. lens as claimed in claim 1, is characterized in that, the first half of described the second exiting surface (22) and/or the latter half have many annular corrugated.
19. 1 kinds of light-emitting devices, comprise lens and light source, it is characterized in that, described lens are the lens as described in any one in claim 1-18, and described light source is LED luminescence chip area source.
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| CN201310050243.1A CN103982855B (en) | 2013-02-08 | 2013-02-08 | lens and light-emitting device |
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| CN104392618A (en) * | 2014-10-16 | 2015-03-04 | 杭州意博高科电器有限公司 | Design method of anti-dazzle LED lamp |
| 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 |
| CN104392618B (en) * | 2014-10-16 | 2017-01-04 | 杭州意博高科电器有限公司 | A kind of method for designing of glare prevention LED lamp |
| CN106681052A (en) * | 2016-11-16 | 2017-05-17 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN109557716A (en) * | 2017-09-26 | 2019-04-02 | 恩普乐股份有限公司 | Planar light source device and display device |
| CN113075815A (en) * | 2020-01-06 | 2021-07-06 | 中强光电股份有限公司 | Light source module |
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| CN109557716A (en) * | 2017-09-26 | 2019-04-02 | 恩普乐股份有限公司 | Planar light source device and display device |
| CN113075815A (en) * | 2020-01-06 | 2021-07-06 | 中强光电股份有限公司 | Light source module |
| CN113075815B (en) * | 2020-01-06 | 2024-02-02 | 中强光电股份有限公司 | Light source module |
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| CN103982855B (en) | 2017-01-11 |
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