CN203744119U - Optical lens and backlight module using same - Google Patents
Optical lens and backlight module using same Download PDFInfo
- Publication number
- CN203744119U CN203744119U CN201320841976.2U CN201320841976U CN203744119U CN 203744119 U CN203744119 U CN 203744119U CN 201320841976 U CN201320841976 U CN 201320841976U CN 203744119 U CN203744119 U CN 203744119U
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- optical lens
- light
- inner concave
- backlight module
- concave arc
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- 230000003287 optical effect Effects 0.000 title claims abstract description 79
- 230000004308 accommodation Effects 0.000 claims description 22
- 239000000758 substrate Substances 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 11
- 238000005286 illumination Methods 0.000 description 9
- 239000004973 liquid crystal related substance Substances 0.000 description 9
- 230000012447 hatching Effects 0.000 description 6
- 230000005142 aphototropism Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The utility model relates to an optical lens and a backlight module using the optical lens. The optical lens is provided with an optical lens body, the bottom of the lens body is concavely arranged to form a containing space used for containing a luminous source, the side wall forming the containing space is an incidence face, externally convex cambered surfaces and internally concave cambered surfaces are arrayed in a staggered mode and connected end to end to form the incidence face, the number of the externally convex cambered surfaces and the number of the internally concave cambered surfaces are respectively four, the radius of the externally convex cambered surfaces is larger than that of the internally concave cambered surfaces, and light emitted by the luminous source is projected to a target projecting plane through the lens body to present a square light shape. The four externally convex cambered surfaces and the four internally concave cambered surfaces are arrayed in the staggered mode and connected end to end to form the incidence face of the optical lens, so that the light emitted by the luminous source is projected to the target projecting plane through the lens body to present the square light shape, and light uniformity and optical taste of the backlight module are improved.
Description
Technical field
The utility model relates to a kind of optical lens and uses its backlight module, especially a kind of backlight module that projects the optical lens of square light shape and use it.
Background technology
At present, because liquid crystal indicator has the advantages such as low, the compact and low voltage drive of electrical power consumed, it has been widely used in the display screen of the mobile communication product such as palmtop computer and mobile phone.Because display panels itself does not have self light emission function, therefore need install backlight module additional to provide display floater required display light source, whether the area source that thus, backlight module produces possesses enough and uniform brightness will directly affect the display quality of liquid crystal indicator.At present, backlight module can be divided into two kinds of side-light type and straight-down negatives according to its structure, wherein, down straight aphototropism mode set has the high illumination uniformity, good bright dipping visual angle, high-light-energy utilization rate, easy package assembly and can rapid fine adjustment picture area light and shade be widely used in large scale liquid crystal display significantly to promote the features such as dynamic contrast because of it.
Existing backlight module generally adopts LED as its light emitting source, and LED has that luminous efficiency is high, the life-span is long and the characteristic such as power consumption is low.The mode that known down straight aphototropism mode set is arranged by matrix is installed in a plurality of LED light sources and a plurality of optical lens on substrate, and with suitable distance, diffuser plate (Diffusion Plate) is covered on the exiting surface of those optical lenses, for the light emitted optical path of dispersed those LED light sources, after mixed light, be projected on display panels and provide brightness uniform area source.
Please refer to Fig. 1, Fig. 1 is the schematic diagram of the shape of projection light of known down straight aphototropism mode set on diffuser plate, a plurality of LED light sources are after a plurality of optical lenses of correspondence, on this diffuser plate, form respectively a plurality of circular light shapes 1, the illumination range that constitutes backlight module demand of these a plurality of circular light shapes 1.Because the adjoiner of 1 of these a plurality of circular light shape is formed with the highlights 10 that mutually occurs simultaneously field of illumination and the dark portion 11 without field of illumination, thus, interlaced highlights 10 and the dark portion 11 without field of illumination will affect the illumination uniformity of backlight module and reduce light mixing effect.In liquid crystal indicator changing pictures when bright dark areas by the GTG level of the contiguous picture area of impact and cause micro-blooming, then reduced definition and the saturation degree of picture image.
Utility model content
In order to address the above problem, the utility model proposes a kind of optical lens and use its backlight module, the light shape that the light that light emitting source sends is projected to a target projection surface after optical lens is square, thereby improves the illumination uniformity and light mixing effect.
In order to achieve the above object, this uses a kind of optical lens of novel proposition, this optical lens has lens body, the bottom Inner spill of this lens body becomes accommodation space, this accommodation space is placed in wherein for light emitting source, the sidewall that forms this accommodation space is incidence surface, this incidence surface is staggered and end to end formation by outer convex globoidal and inner concave arc surface, wherein the number of this outer convex globoidal and this inner concave arc surface is four, and the radius of this outer convex globoidal is greater than the radius of this inner concave arc surface, the light that this light emitting source sends is projected to a target projection surface and presents square light shape through this lens body.
As optional technical scheme, this outer convex globoidal is less than or equal to semicircle cambered surface; Inner concave arc surface is less than or equal to 1/4 arc surface.
As optional technical scheme, the top of this lens body is provided with exiting surface, and the centre of this exiting surface forms recess to lower recess.
As optional technical scheme, the surface at relative this top of this bottom of this lens body is provided with a plurality of micro-structurals, and these a plurality of micro-structurals are for returning the light reflection that this exiting surface is reflected back in this lens body certainly to this exiting surface.
As optional technical scheme, this accommodation space is symmetric space.
As optional technical scheme, this exiting surface is greater than this exiting surface to light intensity that should evagination cambered surface place to light intensity that should inner concave arc surface place.
As optional technical scheme, the diagonal of the corresponding square light shape of line of the center line of two this inner concave arc surfaces adjacent with same this inner concave arc surface.
As optional technical scheme, this light emitting source is arranged on substrate, and this optical lens comprises at least one holding section, and this holding section is arranged at this bottom of this lens body, and this optical lens is fixedly connected with this substrate by this holding section.
Optical lens of the present utility model, by being staggered and the incidence surface of end to end formation optical lens of four outer convex globoidals and four inner concave arc surfaces, make the light that light emitting source sends be projected to target projection surface and present square light shape through optical lens, improve the illumination uniformity and light mixing effect, improved the light uniformity and the optics taste of the backlight module that uses optical lens of the present utility model.
In addition, the utility model also proposes a kind of backlight module, this this backlight module comprises light emitting source and optical lens, this optical lens has lens body, the bottom indent of this lens body forms accommodation space, this accommodation space is placed in wherein for light emitting source, the sidewall that forms this accommodation space is incidence surface, this incidence surface is staggered and end to end formation by outer convex globoidal and inner concave arc surface, wherein the number of this outer convex globoidal and this inner concave arc surface is four, and the radius of this outer convex globoidal is greater than the radius of this inner concave arc surface, the light that this light emitting source sends is projected to a target projection surface and presents square light shape through this lens body.
As optional technical scheme, this outer convex globoidal is less than or equal to semicircle cambered surface; Inner concave arc surface is less than or equal to 1/4 arc surface.
As optional technical scheme, the top of this lens body is provided with exiting surface, and the centre of this exiting surface forms recess to lower recess.
As optional technical scheme, the surface at relative this top of this bottom of this lens body is provided with a plurality of micro-structurals, and these a plurality of micro-structurals are for returning the light reflection that this exiting surface is reflected back in this lens body certainly to this exiting surface.
As optional technical scheme, this accommodation space is symmetric space.
As optional technical scheme, this exiting surface is greater than this exiting surface to light intensity that should evagination cambered surface place to light intensity that should inner concave arc surface place.
As optional technical scheme, the diagonal of the corresponding square light shape of line of the center line of two this inner concave arc surfaces adjacent with same this inner concave arc surface.
As optional technical scheme, this light emitting source is arranged on substrate, and this optical lens comprises at least one holding section, and this holding section is arranged at this bottom of this lens body, and this optical lens is fixedly connected with this substrate by this holding section.
As optional technical scheme, this backlight module also comprises diffuser plate, and this diffuser plate is positioned on this optical lens, and the light that this light emitting source sends projects to this diffuser plate after this optical lens.
Backlight module of the present utility model, by being staggered and the incidence surface of end to end formation optical lens of four outer convex globoidals and four inner concave arc surfaces, make the light that light emitting source sends be projected to target projection surface and present square light shape through optical lens, the illumination uniformity and light mixing effect are improved, the light uniformity and the optics taste of backlight module are improved, improve the picture color saturation degree and the definition that use the liquid crystal indicator of the utility model backlight module, met the demand of consumer in video signal amusement.
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail, but not as to restriction of the present utility model.
Brief description of the drawings
Fig. 1 is the schematic diagram of the shape of projection light of known down straight aphototropism mode set on diffuser plate;
Fig. 2 A is the schematic perspective view of optical lens of the present utility model;
Fig. 2 B is the generalized section along hatching line AA in Fig. 2 A;
Fig. 2 C is the generalized section along hatching line BB in Fig. 2 A;
Fig. 2 D is the top view of optical lens in Fig. 2 A;
Fig. 3 A is the schematic perspective view that in the utility model, light is projected to a target projection face through optical lens;
The schematic diagram of the corresponding relation of square light shape and cambered surface in Fig. 3 B;
Fig. 4 A is the distribution curve flux figure of the first straight line place C face in Fig. 3 B;
Fig. 4 B is the distribution curve flux figure of the second straight line place C face in Fig. 3 B;
Fig. 5 is the sectional perspective schematic diagram of backlight module of the present utility model;
Fig. 6 is the shape of projection light schematic diagram on diffuser plate in Fig. 5;
Fig. 7 is the schematic perspective view of another embodiment of optical lens of the present utility model.
Detailed description of the invention
Please refer to Fig. 2 A, Fig. 2 B, Fig. 2 C, Fig. 2 D and Fig. 3 A, Fig. 2 A is the schematic perspective view of optical lens of the present utility model, Fig. 2 B is the generalized section along hatching line AA in Fig. 2 A, Fig. 2 C is the generalized section along hatching line BB in Fig. 2 A, Fig. 2 D is the top view of optical lens in Fig. 2 A, and Fig. 3 A is the schematic perspective view that in the utility model, light is projected to a target projection face through optical lens.
Optical lens 100 has lens body 110, bottom 160 indents of lens body 110 are to form accommodation space 130, accommodation space 130 is placed in wherein for light emitting source 200, the sidewall that forms accommodation space 130 is incidence surface 150, incidence surface 150 is by outer convex globoidal 141 and inner concave arc surface 142 is staggered and end to end formation, wherein the number of outer convex globoidal 141 and inner concave arc surface 142 is four, and the radius of outer convex globoidal 141 is greater than the radius of inner concave arc surface 142, the light that light emitting source 200 sends is projected to a target projection surface 300 and presents square light shape through lens body 110.
As shown in Figure 2 A, accommodation space 130 is positioned at the center of lens body 110 bottoms 160, and accommodation space 130 is symmetric space, in the present embodiment, accommodation space 160 is a similar cone shape space structure, and accommodation space 160 narrows to top gradually from its bottom, but the present invention is not as limit.Incidence surface 150 is formed by outer convex globoidal 141 and inner concave arc surface 142, in the present embodiment, outer convex globoidal 141 and inner concave arc surface 142 are symmetrical structure, in practical operation, outer convex globoidal 141 is generally less than or equals semicircle cambered surface, and inner concave arc surface 142 is less than or equal to 1/4 arc surface.
As shown in Fig. 2 B, Fig. 2 C and Fig. 3 A, the top 120 of lens body 110 is provided with exiting surface 121, the centre 122 of exiting surface 121 forms recess to lower recess, be projected to the light in exiting surface 121 centres by concave point reflection light emitting source 200, adjustment member opticpath is also redistributed the distribution of light of light emitting source 200, makes light emitting source 200 be projected to light on target projection surface 300 more even.
As shown in Fig. 2 D and Fig. 3 A, light emitting source 200 is arranged on substrate 400, optical lens 100 comprises three holding sections 170, the mode that holding section 170 is equidistant arrangement is arranged at the bottom 160 of lens body 110 near the position of optical lens frontside edge, and optical lens 100 is fixedly connected with substrate 400 by holding section 170.Because equidistantly arrange holding section 170, can provide optical lens 100 stable support force, make the performance of optical lens 100 more stable.In practical operation, user can select quantity and the pattern of holding section 170 voluntarily, is fixedly connected with substrate 400 as long as meet optical lens 100.
As shown in Fig. 2 B and Fig. 3 A, hatching line AA is the projection on the bottom 160 of optical lens 100 of the line of center line of two inner concave arc surfaces 142 adjacent with same inner concave arc surface 142, light L2 represents that the light that light emitting source 200 sends reflects and enters lens body 110 inside through inner concave arc surface 142, then penetrates the light of lens body 110 from exiting surface 121.
As shown in Fig. 2 C and Fig. 3 A, hatching line B B is the projection on the bottom 160 of optical lens 100 of the line of center line of two outer convex globoidals 141 adjacent with same outer convex globoidal 141, light L1 represents that the light that light emitting source 200 sends enters lens body 110 inside through outer convex globoidal 141 refractions, then penetrates the light of lens body 110 from exiting surface 121.
Comparison diagram 2B and Fig. 2 C are known, the light that incident angle is identical enters behind optical lens 100 inside from outer convex globoidal 141 and inner concave arc surface 142, after twice light refraction, penetrate again optical lens 100, wherein, compare the light L1 that enters optics inside and penetrate afterwards optical lens 100 from outer convex globoidal 141, enter optics inside from inner concave arc surface 142 and penetrate afterwards the light L2 of optical lens 100 and there is larger refraction angle; Again due to the setting of inner concave arc surface 142, make the light at the corresponding inner concave arc surface of exiting surface 121 142 places compare the light at outer convex globoidal 141 places more, therefore can project a foursquare clear zone, i.e. square light shape on target projection surface 300.
Please refer to Fig. 3 B, the schematic diagram of the corresponding relation of square light shape and cambered surface in Fig. 3 B.For convenience of description, in Fig. 3 B, only illustrated the projection on optical lens 100 bottoms 160 of square light shape 180, outer convex globoidal 141 and inner concave arc surface 142.Can be found out by Fig. 3 B, the diagonal of the corresponding square light shape of the line of centres of two inner concave arc surfaces 142 adjacent with same inner concave arc surface 142, the diagonal 181 of square light shape 180 (or being called the first straight line 181) overlaps with the line of centres of inner concave arc surface 142.The line of centres of the second straight line 182 of square light shape 180 and two the outer convex globoidals 141 adjacent with same outer convex globoidal 141 is corresponding.
Please refer to Fig. 4 A and Fig. 4 B, Fig. 4 A is the distribution curve flux figure of the first straight line place C face in Fig. 3 B; Fig. 4 B is the distribution curve flux figure of the second straight line place C face in Fig. 3 B.From Fig. 4 A and Fig. 4 B, the light intensity of the first straight line 181 place C faces is greater than the light intensity of the second straight line 182 place C faces.Due to the line of centres of inner concave arc surface 142 in the first straight line 181 corresponding diagram 3B, the line of centres of the second straight line 182 corresponding diagram 3B China and foreign countries convex globoidals 141, illustrate that the light intensity at the corresponding inner concave arc surface of exiting surface 121 142 places is greater than the light intensity at exiting surface 121 corresponding outer convex globoidal 141 places, that is, compare the length of side direction of square light shape 180, in the diagonal of square light shape 180, obtain more light.In practical operation, user can suitably adjust radius and the size of outer convex globoidal 141 and inner concave arc surface 142, except square light shape, can also obtain rectangle light shape etc., and user can adjust according to actual needs voluntarily.
In the time that optical lens 100 of the present utility model is applied in backlight module, please refer to Fig. 5 and Fig. 6.Fig. 5 is the sectional perspective schematic diagram of backlight module of the present utility model, and Fig. 6 is the shape of projection light schematic diagram on diffuser plate in Fig. 5.Backlight module 1000 can be applicable to liquid crystal indicator, thinks that liquid crystal indicator provides lighting source.Backlight module 1000 comprises a plurality of light emitting sources 200 and corresponding a plurality of optical lenses 100 with it, and a plurality of light emitting sources 200 lay respectively in the accommodation space 160 of a plurality of optical lenses 100.In the present embodiment, substrate 400 can be circuit board, light emitting source 200 can be light emitting diode, after a plurality of light emitting sources 200 are matrix form and are electrically connected on circuit board, a plurality of optical lenses 100 are placed in these a plurality of light emitting sources 200 respectively in its accommodation space 160, and a plurality of optical lens 100 is fixedly connected with circuit board.
As shown in Figure 5, backlight module 1000 also comprises diffuser plate 500, diffuser plate 500 is positioned on optical lens 100, see through the secondary optics refraction and reflection of optical lens 100, the ray cast that a plurality of light emitting sources 200 send is to diffuser plate 500, and on target projection surface 300, forms a plurality of square light shapes 180.In the present embodiment, target projection surface 300 is the surface of diffuser plate 500 towards optical lens 100.
As shown in Figure 6, a plurality of square light shape 180 sizes are identical, and mutually closely in abutting connection with being distributed on diffuser plate 500.Because square light shape 180 junctions do not exist clear zone of the prior art or dark space, make on diffuser plate 500 light everywhere even, thereby make backlight module 1000 present full frame uniform briliancy, improve the optics taste of backlight module 1000, improve picture color saturation degree and the definition of the liquid crystal indicator of applying backlight module 1000 of the present utility model, met the demand of consumer in video signal amusement.
Please refer to Fig. 7, the schematic perspective view of another embodiment that Fig. 7 is optical lens of the present utility model.In practical operation, light not only reflects at exiting surface 121 places, then from lens body 110 homed on its target projection surfaces 300, light also reflects at exiting surface 121 places, then be reflected back lens body 110 inside from exiting surface 121, in order to prevent that the light that is reflected back lens body 110 inside from penetrating lens body from the bottom 160 of lens body 110, affect the light utilization of light emitting source 200, the surface 161 at the relative top 120 of the bottom 160 of lens body 110 is provided with a plurality of micro-structurals 190, a plurality of micro-structurals 190 are for returning the light reflection in exiting surface 121 is reflected back lens body 110 to exiting surface 121.As shown in Figure 7, being reflected back the light L3 of lens body 110 inside from exiting surface 121 places will be again from exiting surface 121 homed on its target projection surface 300 after a plurality of micro-structurals 190 places are reflected.
Optical lens of the present utility model and backlight module, by being staggered and the incidence surface of end to end formation optical lens of four outer convex globoidals and four inner concave arc surfaces, make the light that light emitting source sends be projected to target projection surface and present square light shape through optical lens, the light uniformity and the optics taste of backlight module are improved, improve the picture color saturation degree and the definition that use the liquid crystal indicator of the utility model backlight module, met the demand of consumer in video signal amusement.
Certainly; the utility model also can have other various embodiments; in the situation that not deviating from the utility model spirit and essence thereof; those of ordinary skill in the art can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.
Claims (10)
1. an optical lens, this optical lens has lens body, and the bottom indent of this lens body forms accommodation space, and this accommodation space is placed in wherein for light emitting source, and the sidewall that forms this accommodation space is incidence surface, it is characterized in that:
This incidence surface is staggered and end to end formation by outer convex globoidal and inner concave arc surface, wherein the number of this outer convex globoidal and this inner concave arc surface is four, and the radius of this outer convex globoidal is greater than the radius of this inner concave arc surface, the light that this light emitting source sends is projected to a target projection surface and presents square light shape through this lens body.
2. optical lens according to claim 1, is characterized in that: this outer convex globoidal is less than or equal to semicircle cambered surface; Inner concave arc surface is less than or equal to 1/4 arc surface.
3. optical lens according to claim 1, is characterized in that: the top of this lens body is provided with exiting surface, and the centre of this exiting surface forms recess to lower recess.
4. optical lens according to claim 3, it is characterized in that: the surface at relative this top of this bottom of this lens body is provided with a plurality of micro-structurals, these a plurality of micro-structurals are for returning the light reflection that this exiting surface is reflected back in this lens body certainly to this exiting surface.
5. optical lens according to claim 1, is characterized in that: this accommodation space is symmetric space.
6. optical lens according to claim 3, is characterized in that: this exiting surface is greater than this exiting surface to light intensity that should evagination cambered surface place to light intensity that should inner concave arc surface place.
7. optical lens according to claim 1, is characterized in that: the diagonal of the corresponding square light shape of line of the center line of two this inner concave arc surfaces adjacent with same this inner concave arc surface.
8. optical lens according to claim 1, it is characterized in that: this light emitting source is arranged on substrate, this optical lens comprises at least one holding section, and this holding section is arranged at this bottom of this lens body, and this optical lens is fixedly connected with this substrate by this holding section.
9. a backlight module, this backlight module comprises light emitting source, it is characterized in that this backlight module comprises the optical lens described in any one in claim 1 to 8, and this light emitting source is positioned at this accommodation space.
10. backlight module according to claim 9, is characterized in that: this backlight module also comprises diffuser plate, and this diffuser plate is positioned on this optical lens, and the light that this light emitting source sends projects to this diffuser plate after this optical lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320841976.2U CN203744119U (en) | 2013-12-19 | 2013-12-19 | Optical lens and backlight module using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320841976.2U CN203744119U (en) | 2013-12-19 | 2013-12-19 | Optical lens and backlight module using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203744119U true CN203744119U (en) | 2014-07-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320841976.2U Expired - Lifetime CN203744119U (en) | 2013-12-19 | 2013-12-19 | Optical lens and backlight module using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203744119U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191893A (en) * | 2017-07-24 | 2017-09-22 | 深圳市华星光电技术有限公司 | A kind of LED/light source lens and display panel |
| CN108730841A (en) * | 2018-03-06 | 2018-11-02 | 达运精密工业股份有限公司 | light source device and display device using the same |
| WO2018209492A1 (en) * | 2017-05-15 | 2018-11-22 | 苏州奥浦迪克光电技术有限公司 | Backlight module lens and backlight module formed by same |
| CN113777829A (en) * | 2021-08-26 | 2021-12-10 | 惠州视维新技术有限公司 | Optical lens, backlight module and display device |
-
2013
- 2013-12-19 CN CN201320841976.2U patent/CN203744119U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018209492A1 (en) * | 2017-05-15 | 2018-11-22 | 苏州奥浦迪克光电技术有限公司 | Backlight module lens and backlight module formed by same |
| CN107191893A (en) * | 2017-07-24 | 2017-09-22 | 深圳市华星光电技术有限公司 | A kind of LED/light source lens and display panel |
| CN108730841A (en) * | 2018-03-06 | 2018-11-02 | 达运精密工业股份有限公司 | light source device and display device using the same |
| CN113777829A (en) * | 2021-08-26 | 2021-12-10 | 惠州视维新技术有限公司 | Optical lens, backlight module and display device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140730 |
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| CX01 | Expiry of patent term |