CN203784829U - LED (light emitting diode) lens for direct downward type liquid crystal display back light source, and liquid crystal display back light screen - Google Patents
LED (light emitting diode) lens for direct downward type liquid crystal display back light source, and liquid crystal display back light screen Download PDFInfo
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- CN203784829U CN203784829U CN201420035643.5U CN201420035643U CN203784829U CN 203784829 U CN203784829 U CN 203784829U CN 201420035643 U CN201420035643 U CN 201420035643U CN 203784829 U CN203784829 U CN 203784829U
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- liquid crystal
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- cylindrical hole
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 25
- 239000011248 coating agent Substances 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 14
- 230000003287 optical effect Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 4
- 230000001788 irregular Effects 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000009792 diffusion process Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 239000011295 pitch Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- Planar Illumination Modules (AREA)
Abstract
The utility model discloses an LED (light emitting diode) lens for a direct downward type liquid crystal display back light source, and a liquid crystal display back light screen. A plane second reflecting unit and a first reflecting unit of a cone concave structure are adopted, the second reflecting unit adopts the plane structure and plays the role in reflecting a part of excessive light which causes facula central light points and cannot be projected out, so that the problem that the bright points and bright rings appear on a diffusion board above an LED light source is basically solved; a greater projection angle and a larger facula range can be obtained after the light emitted by the light source passes through the lens of the structure.
Description
Technical field
The utility model relates to light emitting diode (LED, Light Emitting Diode) lens technologies field, is specifically related to directly-down liquid crystal display backlight LED lens and LCD backlight screen.
Background technology
LED light source is because its energy-conserving and environment-protective are widely used in fields such as illumination and LCD backlight screens.Particularly in LCD backlight screen, use in enormous quantities, created social value and commercial value widely.LED liquid crystal backlight mainly contains 2 kinds of arrangements:
1, side entering type, utilizes LED to coordinate LGP to realize the uniform brilliance of screen.
2, straight-down negative, utilizes LED to coordinate optical lens to realize uniform brilliance at screen rear direct irradiation screen.
At present, the refraction type optical lenses that use in straight-down negative arrangement more, this kind of lens are because refractive index and the total reflection effect of material affect, limiting under the prerequisite of LED arrangement pitches, between the screen of LED and lens combination and LCD backlight screen, must there is higher projection distance, just can on screen, obtain uniform brilliance.Obviously, the increase of projection distance can increase the cost of LCD backlight screen, and does not meet user to the gossamery requirement of liquid crystal display device.Meanwhile, easily there is the problem of bright spot and bright ring in existing LCD backlight source with LED lens.
Utility model content
The purpose of this utility model is to disclose directly-down liquid crystal display backlight LED lens and LCD backlight screen, has solved existing LCD backlight source LED lens and has easily occurred bright spot and bright ring, the problem that lens thickness is large.
For achieving the above object, the utility model adopts following technical scheme:
Directly-down liquid crystal display backlight LED lens, comprise base station, are located at the first boss on base station and are located at the second boss on this first boss; The sidewall of the sidewall of the first boss and the second boss forms exit facet, and the sidewall of the first boss is the globoidal structure of evagination; The end face of the second boss is reflecting surface, this reflecting surface is by the first reflecting surface unit and the second reflecting surface cell formation, wherein the first reflecting surface unit is cone sunk structure, and the second reflecting surface unit is planar structure, and the second reflecting surface cell rings is around the second reflecting surface unit; The bottom of base station is provided with the cylindrical hole for diode installed LED, and the surface of this cylindrical hole forms the plane of incidence; The light that LED sends is injected from the plane of incidence, and a part of light penetrates from exit facet after reflecting surface reflection, and another part light directly penetrates from exit facet.
Further, described the first reflecting surface unit and described cylindrical hole coaxial cooperation, described the second reflecting surface unit and the first reflecting surface unit coaxial cooperation, the second reflecting surface unit is annular.
Further, the cross section contour of described cone sunk structure is outwards outstanding camber line structure.
Further, the sidewall of described the second boss is conical structure.
Further, the surface of described cylindrical hole is made up of cylindrical hole side and cylindrical hole bottom surface, the cylindrical structure in cylindrical hole side, and cylindrical hole bottom surface is cone sunk structure.
Further, described base station is provided with cannelure, this cannelure be positioned at cylindrical hole outside and and cylindrical hole coaxial cooperation; The section of this cannelure surface and cylindrical hole is provided with the irregular particle shape texture with volume scattering characteristic.
Further, described base station, described the first boss and described the second boss are overall structure, and the transparent resin material that is 1.5 by refractive index is made.
Further, described base station is circular base station or square base station.
The invention also discloses LCD backlight screen, comprise direct-type backlight optical lens described in above-mentioned any one.
Further, also comprise reflectance coating and diffuser plate, described in several, direct-type backlight is located on reflectance coating with optical lens, and rectangular array distribution, and line-spacing is A, and array pitch is B; Diffuser plate is positioned at reflectance coating and a kind of direct-type backlight optical lens top, and the spacing of diffuser plate and reflectance coating is C, apart from high ratio
s is more than or equal to 4.5.
Compared with prior art, the beneficial effects of the utility model:
The utility model adopts above structure, adopt second reflector element and the first reflector element that is cone sunk structure of plane, it is the unnecessary light that reflects away a part and can cause spot center bright spot that the second reflector element adopts planar structure its effect, can not project away, thereby solve at all the problem that bright spot and bright ring appear in the diffuser plate directly over LED light source; Adopt above structure simultaneously, can make the light that light source sends after lens, have larger crevice projection angle and hot spot scope.
The utility model provides a kind of brand-new refraction-reflection optics LED lens, and light is after this lens reflection and total reflection, in closely presenting the uniform hot spot of large-scale briliancy in plane; Utilize the first principles computations secondary computer emulation technology of optics, realize and having compared under the prerequisite that LED arrangement pitches is identical with existing refraction type optical lens, projection distance has been reduced to half (realize large apart from high than) and still can obtain the object of the same briliancy uniformity.
The utility model is made exit facet after curved surface to a certain degree, and it is larger that the light that LED sends entered the light scope of launching after lens, and while using on LCD backlight screen, the backlight effect of LCD backlight screen is more even.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the front schematic perspective view one of directly-down liquid crystal display backlight LED lens embodiment one in the utility model;
Fig. 2 is embodiment illustrated in fig. 1 one back side schematic perspective view two;
Fig. 3 is embodiment illustrated in fig. 1 one generalized section;
Fig. 4 is embodiment illustrated in fig. 1 one light refraction path schematic diagram;
Fig. 5 is the structural representation of LCD backlight screen embodiment bis-in the utility model;
Fig. 6 is the scheme of installation of reflectance coating and a kind of direct-type backlight optical lens in Fig. 5;
In figure, 10-directly-down liquid crystal display backlight LED lens; 1-base station; The bottom of 11-base station; 12-cylindrical hole; 121-cylindrical hole side; 122-cylindrical hole bottom surface; 13-cannelure; 2-the first boss; The sidewall of 21-the first boss; 3-the second boss; The sidewall of 31-the second boss; 4-reflecting surface; 41-the first reflecting surface unit; 411-cross section contour; 42-the second reflecting surface unit; 20-LCD backlight screen; 201-reflectance coating; 202-diffuser plate; 203-bright enhancement film; 204-liquid crystal panel; 30-LED light source.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.
Embodiment mono-
LED lens 10 for embodiment directly-down liquid crystal display backlight, comprise base station 1, are located at the first boss 2 on base station 1 and are located at the second boss 3 on this first boss 2 as shown in Figures 1 to 4; The sidewall 21 of the first boss and the sidewall 31 of the second boss form exit facet, and the sidewall 21 of the first boss is the globoidal structure of evagination; The end face of the second boss is reflecting surface 4, this reflecting surface 4 is made up of the first reflecting surface unit 41 and the second reflecting surface unit 42, wherein the first reflecting surface unit 41 is cone sunk structure, and the second reflecting surface unit 42 is planar structure, and the second reflecting surface unit 42 is around the first reflecting surface unit 41; The bottom 11 of base station is provided with the cylindrical hole 12 for diode installed LED, and the surface of this cylindrical hole 12 forms the plane of incidence; The light that LED sends is injected from the plane of incidence, and a part of light penetrates from exit facet after reflecting surface reflection, and another part light directly penetrates from exit facet.
The first reflecting surface unit 41 and cylindrical hole 12 coaxial cooperation, the second reflecting surface unit 42 and the first reflecting surface unit 41 coaxial cooperation, the second reflecting surface unit 42 is annular.
In the present embodiment, the cross section contour 411 of cone sunk structure is outwards outstanding camber line structure.The sidewall of the second boss 3 is conical structure.The surface of cylindrical hole 12 is made up of cylindrical hole side 121 and cylindrical hole bottom surface 122, the cylindrical structure in cylindrical hole side 121, and cylindrical hole bottom surface 122 is cone sunk structure.
Base station 1 is provided with cannelure 13, this cannelure 13 be positioned at cylindrical hole 12 outside and and cylindrical hole 12 coaxial cooperation; The section of these cannelure 13 surfaces and cylindrical hole 12 is provided with the irregular particle shape texture with volume scattering characteristic.Base station 1, the first boss 2 and the second boss 3 are overall structure, and the transparent resin material that is 1.5 by refractive index is made.Base station 1 is circular base station or square base station.
Embodiment mono-directly-down liquid crystal display backlight uses other structure of LED lens referring to prior art.
Embodiment bis-
Embodiment bis-LCD backlights screens 20 as shown in Figure 5 and Figure 6, comprise shown in embodiment mono-optical lens 10 for direct-type backlight.
Embodiment bis-also comprises reflectance coating 201, diffuser plate 202, bright enhancement film 203 and liquid crystal panel 204, and several direct-type backlights are located on reflectance coating 201 with optical lens 10, and rectangular array distribution, and line-spacing is A, and array pitch is B; Diffuser plate 202 is positioned at reflectance coating 201 and direct-type backlight with optical lens 10 tops, and the spacing of diffuser plate 202 and reflectance coating 201 is C, apart from high ratio
s is more than or equal to 4.5.
Bright enhancement film 203 in the present embodiment covers on diffuser plate 202, and liquid crystal panel 204 covers on diffuser plate 202, and the quantity of bright enhancement film 203 is three layers, but is not limited to three layers, can increase and decrease according to demand.LED light source 30 is located at the plane of incidence 2 belows.
Other structure of embodiment bis-LCD backlight screens is referring to prior art.
The utility model is not limited to above-mentioned embodiment, if various changes of the present utility model or modification are not departed to spirit and scope of the present utility model, if within these changes and modification belong to claim of the present utility model and equivalent technologies scope, the utility model is also intended to comprise these changes and modification.
Claims (10)
1. directly-down liquid crystal display backlight LED lens, is characterized in that: comprise base station, be located at the first boss on base station and be located at the second boss on this first boss; The sidewall of the sidewall of the first boss and the second boss forms exit facet, and the sidewall of the first boss is the globoidal structure of evagination; The end face of the second boss is reflecting surface, this reflecting surface is by the first reflecting surface unit and the second reflecting surface cell formation, wherein the first reflecting surface unit is cone sunk structure, and the second reflecting surface unit is planar structure, and the second reflecting surface cell rings is around the first reflecting surface unit; The bottom of base station is provided with the cylindrical hole for diode installed LED, and the surface of this cylindrical hole forms the plane of incidence; The light that LED sends is injected from the plane of incidence, and a part of light penetrates from exit facet after reflecting surface reflection, and another part light directly penetrates from exit facet.
2. directly-down liquid crystal display backlight LED lens as claimed in claim 1, it is characterized in that: described the first reflecting surface unit and described cylindrical hole coaxial cooperation, described the second reflecting surface unit and the first reflecting surface unit coaxial cooperation, the second reflecting surface unit is annular.
3. directly-down liquid crystal display backlight LED lens as claimed in claim 1 or 2, is characterized in that: the cross section contour of described cone sunk structure is outwards outstanding camber line structure.
4. directly-down liquid crystal display backlight LED lens as claimed in claim 1, is characterized in that: the sidewall of described the second boss is conical structure.
5. directly-down liquid crystal display backlight LED lens as claimed in claim 1 or 2, it is characterized in that: the surface of described cylindrical hole is made up of cylindrical hole side and cylindrical hole bottom surface, the cylindrical structure in cylindrical hole side, cylindrical hole bottom surface is cone sunk structure.
6. directly-down liquid crystal display backlight LED lens as claimed in claim 5, is characterized in that: described base station is provided with cannelure, this cannelure be positioned at cylindrical hole outside and and cylindrical hole coaxial cooperation; The section of this cannelure surface and cylindrical hole is provided with the irregular particle shape texture with volume scattering characteristic.
7. directly-down liquid crystal display backlight LED lens as claimed in claim 1, is characterized in that: described base station, described the first boss and described the second boss are overall structure, and the transparent resin material that is 1.5 by refractive index is made.
8. directly-down liquid crystal display backlight LED lens as claimed in claim 1, is characterized in that: described base station is circular base station or square base station.
9. LCD backlight screen, is characterized in that: comprise direct-type backlight optical lens described in above-mentioned any one.
10. LCD backlight shields as claimed in claim 9, it is characterized in that: also comprise reflectance coating and diffuser plate, described in several, direct-type backlight is located on reflectance coating with optical lens, and rectangular array distribution, and line-spacing is A, and array pitch is B; Diffuser plate is positioned at reflectance coating and a kind of direct-type backlight optical lens top, and the spacing of diffuser plate and reflectance coating is C, apart from high ratio
s is more than or equal to 4.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420035643.5U CN203784829U (en) | 2014-01-20 | 2014-01-20 | LED (light emitting diode) lens for direct downward type liquid crystal display back light source, and liquid crystal display back light screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420035643.5U CN203784829U (en) | 2014-01-20 | 2014-01-20 | LED (light emitting diode) lens for direct downward type liquid crystal display back light source, and liquid crystal display back light screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203784829U true CN203784829U (en) | 2014-08-20 |
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ID=51321010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420035643.5U Expired - Lifetime CN203784829U (en) | 2014-01-20 | 2014-01-20 | LED (light emitting diode) lens for direct downward type liquid crystal display back light source, and liquid crystal display back light screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203784829U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017088100A1 (en) * | 2015-11-23 | 2017-06-01 | 成都派斯光学有限公司 | Short-range light mixer |
| CN107991807A (en) * | 2017-12-07 | 2018-05-04 | 苏州奥浦迪克光电技术有限公司 | The backlight module of backlight module lens and its composition |
| US11280473B2 (en) | 2019-08-07 | 2022-03-22 | Au Optronics Corporation | Optical lens, light-emitting device and backlight module |
-
2014
- 2014-01-20 CN CN201420035643.5U patent/CN203784829U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017088100A1 (en) * | 2015-11-23 | 2017-06-01 | 成都派斯光学有限公司 | Short-range light mixer |
| CN107991807A (en) * | 2017-12-07 | 2018-05-04 | 苏州奥浦迪克光电技术有限公司 | The backlight module of backlight module lens and its composition |
| US11280473B2 (en) | 2019-08-07 | 2022-03-22 | Au Optronics Corporation | Optical lens, light-emitting device and backlight module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140820 |