CN205208443U - Lens, backlight unit who has these lens and display device - Google Patents
Lens, backlight unit who has these lens and display device Download PDFInfo
- Publication number
- CN205208443U CN205208443U CN201520965305.6U CN201520965305U CN205208443U CN 205208443 U CN205208443 U CN 205208443U CN 201520965305 U CN201520965305 U CN 201520965305U CN 205208443 U CN205208443 U CN 205208443U
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- Prior art keywords
- lens
- connecting portion
- light
- utility
- reflection
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Abstract
The utility model provides a lens, it has a center pin, lens round center pin rotational symmetry, it includes lower surface, upper surface and side surface, and the lower surface has the incident surface, and the light that LED sent passes through the incident surface gets into lens, the transversal toper shape of personally submitting the intermediate position undercut of upper surface, upper surface include a plane of reflection and lie in the connecting portion on plane of reflection top, the connecting portion transmission is through incident surface entering lens then directly incide the light of connecting portion, the plane of reflection reflection is through incident surface entering lens then directly incide the light of plane of reflection, the side surface will the lower surface is connected to the upper surface, and the side surface will directly be followed the incident surface gets into lens then directly incide the light and the follow of side surface the smooth outgoing of upper surface reflection. The utility model discloses can improve the regional phenomenon dark partially of the epaxial side of lens center, adjustable differential of the arc size is in order to adjust the bright dark of central point simultaneously.
Description
Technical field
The utility model relates to lighting field, particularly relates to a kind of lens, has the backlight module of these lens and display device.
Background technology
Along with the development of big screen LCD, slimming and uniform light efficiency become its development trend.Therefore, in the LED-backlit module of straight-down negative, a kind of can to carry out the application of the lens of secondary distribution to light extensive all the more.
Refer to Fig. 1, it is the structural representation of prior art lens.As shown in Figure 1, the upper surface 11 of lens 1 is the conical reflecting surface of a centre position to lower recess, and its conical apex angle is generally within 90 degree.Light is incident from the lower surface 12 of lens 1, is then totally reflected at upper surface 11, finally 13 injections from the side.
The light of the overwhelming majority is totally reflected at the upper surface of lens, and particularly at central shaft near zone, another also have a fraction of light, can go out from the direct transmission of this upper surface.When the angle of the conical apex angle of lens is within 30 degree, at the summit place of taper surface, the ratio that light is gone out in this direct transmission, only less than 5%, so it is on the low side easily to cause lens centre axle 14 upper area to obtain light, thus makes the light efficiency of backlight module in this region partially dark.
Therefore, be necessary to provide a kind of new technical scheme.
Utility model content
In order to overcome above-mentioned defect, the utility model provides a kind of lens, and it can improve the partially dark phenomenon in axis of lens overcentre region.
According to an aspect of the present utility model, the utility model provides a kind of lens, and it has a central shaft, and described lens are around described central shaft Rotational Symmetry, and described lens comprise lower surface, upper surface and side surface,
Described lower surface has incidence surface, and the light that LED sends enters described lens through described incidence surface;
The cross section of described upper surface is the conical by its shape of centre position to lower recess, described upper surface comprises a reflecting surface and is positioned at the connecting portion on described reflecting surface top, described connecting portion is transmitted through incidence surface and enters the light that then described lens are directly incident on described connecting portion, and described reflective surface enters through incidence surface the light that then described lens are directly incident on described reflecting surface;
Described lower surface is connected to upper surface by described side surface, and described side surface enters the light that then described lens are directly incident on described side surface and the light outgoing of reflecting from described upper surface by direct from described incidence surface.
As the utility model one preferred embodiment, described connecting portion is cambered surface.
As the utility model one preferred embodiment, the arc radius of described cambered surface is 5-50 μm.
As the utility model one preferred embodiment, described connecting portion is curve form.
As the utility model one preferred embodiment, the top of described connecting portion is in the distance on the direction of vertical described central shaft is 5-50 μm.
According to another aspect of the present utility model, the utility model provides a kind of backlight module with these lens, and it comprises:
LED light source;
Lens described above, described LED lens are positioned over above described LED light source.
According to another aspect of the present utility model, the utility model provides a kind of display unit, and it comprises:
LED light source;
Lens described above, described LED lens are positioned over above described LED light source.
The beneficial effects of the utility model: compared with prior art, the utility model tool has the following advantages:
Improve the phenomenon that lens centre axle upper area is partially dark.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.Wherein:
Fig. 1 is the structural representation of lens in prior art;
Fig. 2 is the utility model lens structural representations in a specific embodiment;
Fig. 3 is the close-up schematic view of upper surface in Fig. 2.
Detailed description of the invention
For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in further detail the utility model below in conjunction with the drawings and specific embodiments.
Alleged herein " embodiment " or " embodiment " refers to special characteristic, structure or the characteristic that can be contained at least one implementation of the utility model.Different local in this manual " in one embodiment " occurred not all refers to same embodiment, neither be independent or optionally mutually exclusive with other embodiments embodiment.
Refer to Fig. 2 and Fig. 3.Fig. 2 is the structural representation of the utility model lens; Fig. 3 is the structural representation of upper surface in Fig. 2.As shown in Figures 2 and 3, described lens 100 are around central shaft 107 Rotational Symmetry, and it comprises lower surface 101, upper surface and side surface 103.
Described lower surface 101 has incidence surface 105, and the light 108 sent enters described lens through described incidence surface 105.
The cross section of described upper surface is the conical by its shape of centre position to lower recess, described upper surface comprises a reflecting surface 102 and is positioned at the connecting portion 104 on described reflecting surface 102 top, described connecting portion 104 is transmitted through incidence surface 105 and enters the part light 108 that then described lens are directly incident on described connecting portion 104, and described reflecting surface 102 reflects and enters through incidence surface 105 light that then described lens are directly incident on described reflecting surface 102.Reflecting surface 102 of the present utility model can be arcwall face.
Described lower surface 101 is connected to upper surface by described side surface 103, and described side surface 103 enters the light that then described lens are directly incident on described side surface 103 and the light outgoing of reflecting from described upper surface by direct from described incidence surface 105.
In this embodiment, described connecting portion 104 is cambered surface, and the arc radius of described cambered surface is 5-50 μm.In one embodiment, described arc radius is 5 μm.In another embodiment, described arc radius is 50 μm.
In another embodiment, described connecting portion 104 can be arbitrary curve form.
The top distance be on the direction of vertical described central shaft of the described connecting portion 104 of the utility model lens is 5-50 μm
The utility model, under the situation not changing the main direction of advance of original light, ensure that and is equipped with a certain proportion of beam projecting in the interposition of lens, thus the phenomenon that the central shaft upper area improving lens is partially dark.
Described lower surface 101 also offers the groove 106 for holding LED lamp source.
In another embodiment, the utility model provides a kind of backlight module, and it comprises LED light source (not shown) and said lens, and described lens are positioned over above described LED light source.
In a further embodiment, the utility model provides a kind of display unit, and it comprises LED light source and said lens, and described lens are positioned over above described LED light source.
The utility model tool has the following advantages:
Improve the phenomenon that lens centre axle upper area is partially dark.
Above-mentioned explanation fully discloses detailed description of the invention of the present utility model.It is pointed out that the scope be familiar with person skilled in art and any change that detailed description of the invention of the present utility model is done all do not departed to claims of the present utility model.Correspondingly, the scope of claim of the present utility model is also not limited only to previous embodiment.
Claims (7)
1. lens, it has a central shaft, and described lens, around described central shaft Rotational Symmetry, is characterized in that: it comprises lower surface, upper surface and side surface,
Described lower surface has incidence surface, and the light that LED sends enters described lens through described incidence surface;
The cross section of described upper surface is the conical by its shape of centre position to lower recess, described upper surface comprises a reflecting surface and is positioned at the connecting portion on described reflecting surface top, described connecting portion is transmitted through incidence surface and enters the light that then described lens are directly incident on described connecting portion, and described reflective surface enters through incidence surface the light that then described lens are directly incident on described reflecting surface;
Described lower surface is connected to upper surface by described side surface, and described side surface enters the light that then described lens are directly incident on described side surface and the light outgoing of reflecting from described upper surface by direct from described incidence surface.
2. lens as claimed in claim 1, is characterized in that: described connecting portion is cambered surface.
3. lens as claimed in claim 2, is characterized in that: the arc radius of described cambered surface is 5-50 μm.
4. lens as claimed in claim 1, is characterized in that: described connecting portion is curve form.
5. lens as claimed in claim 1, is characterized in that: the top distance be on the direction of vertical described central shaft of described connecting portion is 5-50 μm.
6. there is a backlight module for these lens, it is characterized in that: it comprises:
LED light source;
Lens as described in as arbitrary in claim 1-5, described lens are positioned over above described LED light source.
7. a display unit, is characterized in that: it comprises:
LED light source;
Lens as described in as arbitrary in claim 1-5, described lens are positioned over above described LED light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520965305.6U CN205208443U (en) | 2015-11-30 | 2015-11-30 | Lens, backlight unit who has these lens and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520965305.6U CN205208443U (en) | 2015-11-30 | 2015-11-30 | Lens, backlight unit who has these lens and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205208443U true CN205208443U (en) | 2016-05-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520965305.6U Expired - Fee Related CN205208443U (en) | 2015-11-30 | 2015-11-30 | Lens, backlight unit who has these lens and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205208443U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105371234A (en) * | 2015-11-30 | 2016-03-02 | 苏州东山精密制造股份有限公司 | Lens, backlight module with lens and display equipment |
| 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 |
-
2015
- 2015-11-30 CN CN201520965305.6U patent/CN205208443U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105371234A (en) * | 2015-11-30 | 2016-03-02 | 苏州东山精密制造股份有限公司 | Lens, backlight module with lens and display equipment |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170503 Address after: Dongguan City, Guangdong province 523000 Gaobu Town Zhu Hom Industrial Zone Patentee after: DONGGUAN DONGSHAN PRECISION MANUFACTURING CO., LTD. Address before: 215107 No. 8 Stone Hill Road, Dongshan Industrial Park, Jiangsu, Suzhou Patentee before: Suzhou Dongshan Precision Manufacturing Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160504 Termination date: 20201130 |