CN202629915U - Secondary lens with bottom surface in curved surface structure - Google Patents
Secondary lens with bottom surface in curved surface structure Download PDFInfo
- Publication number
- CN202629915U CN202629915U CN 201220317534 CN201220317534U CN202629915U CN 202629915 U CN202629915 U CN 202629915U CN 201220317534 CN201220317534 CN 201220317534 CN 201220317534 U CN201220317534 U CN 201220317534U CN 202629915 U CN202629915 U CN 202629915U
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- Prior art keywords
- secondary lens
- curved
- concave curvatures
- light
- central shaft
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Abstract
The utility model discloses a secondary lens with a bottom surface in a curved surface structure. The secondary lens is in rotational symmetry along a central axis and comprises the bottom surface and an arc light emergent surface connected with the bottom surface; the secondary lens is arranged above a point light source; and the bottom surface comprises an arc concave light incident surface in the middle and an annular concave curved surface connected with the arc concave light incident surface. The secondary lens provided by the utility model has the advantages that a continuous curved surface formed by connecting the arc concave light incident surface in the middle and the annular concave curved surface is formed on the bottom surface, and therefore, the diffusion angle of the light source is widened, the light diffusion effect is good, and light reaching a receiving board is more uniform; and the secondary lens provided by the utility model can be applied to both a backlight module and a lighting system requiring a uniform light diffusion effect.
Description
Technical field
The utility model relates to lens arrangement, relates in particular to be applied to the luminous light-emitting device of wide-angle, and particularly adopting the bottom surface in the module backlight of dot matrix backlight is the secondary lens of curved-surface structure.
Background technology
At present, employed liquid crystal module adopts TFT-LCD (TFT LCD) technology more in the flat-panel screens.TFT-LCD is the luminous demonstration of inactive mode, by white light module backlight (Backlight Module) uniform system brightness is provided usually, sees through colored filter (Color Filter) again and obtains the abundant colors demonstration.
As shown in Figure 1, existing white light down straight aphototropism mode set comprises light source and optical diaphragm group 04.Light emitting diode 03 (LED) therefore becomes one of light source of LCD backlight module use because volume is little, power consumption is few; LED03 is the lambertian distribution light source, and the hot spot directly over the light source is less, in the use of module backlight, needs more LED03.
As shown in Figure 2, having at present increases a secondary lens 05 above LED03, thereby the light that changes LED03 distributes, and increases the angle of flare of LED light, reduces mixed light intensity.The LED03 that is provided with secondary lens is applied in the down straight aphototropism mode set, increases the facula area on Film (film) material 04 surface greatly, effectively reduce the usage quantity of LED03, reduce the cost of down straight aphototropism mode set.
As shown in Figure 3; The operation principle of the down straight aphototropism mode set of band secondary lens is: when light A is incident to exiting surface 02 through incidence surface 011; Part light reflexes to bottom surface 012; By bottom surface 012 again during reflected back exiting surface 02 light towards central shaft, cause central shaft near light intensity stronger, thereby make the light skewness.
Summary of the invention
In order to overcome the deficiency of prior art, the purpose of the utility model provides that a kind of to make the bottom surface of the uniform more module spot light backlight of light that sends be the secondary lens of curved-surface structure.
For achieving the above object; The technical scheme of the utility model is: the bottom surface is the secondary lens of curved-surface structure; It is along central shaft rotation symmetry; It comprises bottom surface and the arc exiting surface that is connected with the bottom surface, and it is located at the spot light top, and said bottom surface comprises the incidence surface and the annular concave curved surface that is connected with this arcuation spill incidence surface of middle part arcuation spill.
The height of said incidence surface is greater than its bottom width, and the height of exiting surface is less than the width of its bottom surface;
When being the y axle with the central shaft, any bottom line that central shaft is crossed in the bottom surface is the x axle, when the intersection point of x axle and y axle is starting point,
Exiting surface is crossed the point coordinates of the curve in central shaft cross section, and (x y) satisfies: x
2+ y
2Value with | the increase of x| increases;
Incidence surface is crossed the point coordinates of the curve in central shaft cross section, and (x y) satisfies: x
2+ y
2Value with | the increase of x| reduces;
The bottom surface concave curvatures cross the curve in central shaft cross section point coordinates (x, y) satisfy: y earlier along with | x| increases and increases, behind the peak that increases to the bottom surface concave curvatures, y with | the increase of x| reduces.
Said exiting surface center is provided with an inner concave, plane or convex surface.According to demand, heart shape in the exiting surface is cooperated with incidence surface, because of incidence surface is the arcuation spill, when secondary lens needs the center brighter, then the exiting surface center adopts convex surface to cooperate with incidence surface; When secondary lens needs the center more secretly, then the exiting surface center adopts inner concave to cooperate with incidence surface; If no special requirement, then the exiting surface center adopts the plane to cooperate with incidence surface.
The ratio H/L < 0.176 of the concave curvatures peak of said bottom surface apart from the distance H of bottom surface and concave curvatures peak to the distance L of central shaft; Said concave curvatures peak is L1 to the vertical range of the tie point of concave curvatures and incidence surface, and H/>L1 < 0.34.
When the vertical height H of the concave curvatures peak of secondary lens bottom surface and bottom surface is higher, can obtain diffusion effect preferably, be folded to central shaft but the H excessive height can cause part light, thereby cause the light skewness, distribution curve flux has a convexity.Simultaneously; Distribute and can know by led light source, luminous angle greater than the light intensity of 160 degree near 0, promptly; < 10 ° the time, the light of being introduced by the bottom surface is little to the influence that central axis direction reflects as θ (intersection point of bottom surface and central shaft is to the straight line of concave curvatures peak and the angle of bottom surface).So the vertical range H of concave curvatures peak and bottom surface and concave curvatures peak are that < arctan10 ° is H/>L < 0.176 to H/>L apart from the ratio of the vertical range L of central shaft.
Light through bottom reflection can make light be folded to central shaft after the concave curvatures of bottom surface, and the center is brightened, and then makes the light skewness of light source receiving plane.Find through experiment, when the H/L1 value less than 0.34 the time, this part light causes that the bright excessively influence in center is less.So, through the value of adjustment H and L1, even H/L1 < 0.34.
Said incidence surface and concave curvatures are a circle horizontal plane in the junction of bottom surface, so not only are convenient to the processing of the junction of incidence surface and concave curvatures, the fixing of be more convenient for bottom surface and spot light; Said exiting surface and concave curvatures are a circle horizontal plane in the junction of bottom surface, thereby are convenient to the processing of the junction of exiting surface and concave curvatures.
Said exiting surface and bottom surface are a circle vertical plane in the junction of side, not only are convenient to process the junction of exiting surface and concave curvatures, and the side that also helps secondary lens is fixed.
The tie point of said concave curvatures and incidence surface is the minimum point of bottom surface, and the light that sends of spot light all appears through incidence surface like this, and the light source utilization rate is high.
The tie point of said concave curvatures and incidence surface is higher than the minimum point of bottom surface.
Said secondary lens is light transmittances such as PETG (PET), Merlon (PC), polymethyl methacrylate (PMMA), polystyrene (PS) or glass material products preferably.
Said secondary lens is applied in the module backlight, and this module backlight can be straight-down negative or side entering type, can effectively reduce the usage quantity of LED, thereby practices thrift cost.
The light source of said secondary lens is a spot light, like light sources such as LED lamp or laser.
The secondary lens of the utility model, the bottom surface is connected to form continuous curved surface by middle part arcuation spill incidence surface and annular concave curved surface, thereby enlarges the angle of flare of light source, makes the light diffusion effect good, and the light that arrives on the dash receiver is more even; The secondary lens of the utility model can be applicable in the module backlight, and also can be applicable to needs in the illuminator of the even diffusion effect of light.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is done further detailed explanation:
Fig. 1 is the structural representation of existing white light down straight aphototropism mode set;
Fig. 2 is the structural representation of the down straight aphototropism mode set of existing band secondary lens;
Fig. 3 is the operation principle sketch map of the down straight aphototropism mode set of existing band secondary lens;
Fig. 4 is the operation principle sketch map of the secondary lens of curved-surface structure for the utility model bottom surface;
Fig. 5 is the structural representation of embodiment 1;
Fig. 6 is the structural representation of embodiment 2;
Fig. 7 is the structural representation of the minimum point of bottom surface for the tie point of concave curvatures and incidence surface;
Fig. 8 is higher than the structural representation of the minimum point of bottom surface for the tie point of concave curvatures and incidence surface;
Fig. 9 is applied to the structural representation in the down straight aphototropism mode set for the secondary lens of the utility model.
The specific embodiment
Shown in one of Fig. 4-9; The utility model bottom surface is the secondary lens of curved-surface structure; It is along central shaft rotation symmetry; It comprises bottom surface 1 and the arc exiting surface 2 that is connected with bottom surface 1, and it is located at spot light 3 tops, and said bottom surface comprises the incidence surface 11 and the annular concave curved surface 12 that is connected with this arc spill incidence surface 11 of middle part arcuation spill.
As shown in Figure 4, adopt above structure, outwards reflect during part light b process incidence surface 11, outwards reflect once more during through exiting surface 2, reach the purpose of light diffusion.
Part light a reflects when arriving exiting surface 2, and during to concave curvatures 12, because concave curvatures 12 effect on structure, light reduces near the light intensity of lens centre axle to external reflectance, and the light near the light source receiving plane 4 of central shaft is evenly distributed.
Part during through concave curvatures 12, because concave curvatures 12 effect on structure light outwards reflect, makes the light diffusion from the light c of export-oriented concave curvatures 12 reflections of secondary lens.
As shown in Figure 7, the height H 1 of said incidence surface 11 is greater than its bottom width L2, and the height H 2 of exiting surface 2 is less than the width L3 of its bottom surface;
When being the y axle with the central shaft, any bottom line that central shaft is crossed in bottom surface 1 is the x axle, when the intersection point of x axle and y axle is starting point,
(x y) satisfies: x the point coordinates of the curve in exiting surface 2 mistake central shaft cross sections
2+ y
2Value with | the increase of x| increases;
(x y) satisfies: x the point coordinates of the curve in incidence surface 11 mistake central shaft cross sections
2+ y
2Value with | the increase of x| reduces;
Bottom surface concave curvatures 12 cross the curve in central shaft cross sections point coordinates (x, y) satisfy: y earlier along with | x| increases and increases, behind the peak that increases to bottom surface concave curvatures 12, y with | the increase of x| reduces.
Said spot light 3 is light sources such as LED lamp or laser.
Said exiting surface 2 centers are provided with an inner concave, plane or convex surface 21.According to demand, heart shape in the exiting surface 2 is cooperated with incidence surface 11, because of incidence surface 11 is the arcuation spill, when the brighter distribution in 4 demand centers of light source receiving plane, then the convex surface design can be adopted in exiting surface center 21; Darker or whole hot spot distributes uniformly when light source receiving plane 4 demand centers, and then concave surface or planar design can be adopted in exiting surface center 21.
The ratio H/L < 0.176 of concave curvatures 12 peaks of said bottom surface apart from the distance H of bottom surface and concave curvatures 12 peaks to the distance L of central shaft.
When the vertical height H of concave curvatures 12 peaks of secondary lens bottom surface and bottom surface is higher, can obtain diffusion effect preferably, be folded to central shaft but the H excessive height can cause part light, thereby cause the light skewness, distribution curve flux has a convexity.Simultaneously; Distribute and can know by led light source, luminous angle greater than the light intensity of 160 degree near 0, promptly; < 10 ° the time, the light of being introduced by the bottom surface is little to the influence that central axis direction reflects as θ (intersection point of bottom surface and central shaft is to the straight line of concave curvatures peak and the angle of bottom surface).So when spot light is a led light source, the vertical range H of concave curvatures 12 peaks and bottom surface 1 and concave curvatures 12 peaks are H/>L < arctan10 ° (arctan10 °=0.176) apart from the ratio of the vertical range L of central shaft.
Said concave curvatures 12 peaks are L1 to the vertical range of the tie point of concave curvatures 12 and incidence surface 11, and H/L1 < 0.34.The light of 1 reflection can make light be folded to central shaft after the concave curvatures 12 of bottom surface through the bottom surface, the center is brightened, and then make the light skewness of light source receiving plane 4.Find through experiment, when the H/>L1 value less than 0.34 the time, this part light causes that the bright excessively influence in center is less.So, through the value of adjustment H and L1, even H/L1 < 0.34.
Said secondary lens is light transmittances such as PETG (PET), Merlon (PC), polymethyl methacrylate (PMMA), polystyrene (PS) or glass material products preferably.
Embodiment 1
As shown in Figure 5,1 junction is a circle horizontal plane 5 in the bottom surface for said incidence surface 11 and concave curvatures 12, so not only is convenient to the processing of incidence surface 11 and the junction of concave curvatures 12, the fixing of be more convenient for bottom surface 1 and spot light 3; 1 junction is a circle horizontal plane 6 in the bottom surface for said exiting surface 2 and concave curvatures 12, thereby is convenient to the processing of exiting surface 2 and the junction of concave curvatures 12.
As shown in Figure 6, said exiting surface 2 is a circle vertical plane 7 in the junction of side with bottom surface 1, not only is convenient to process the junction of exiting surface 2 and concave curvatures 12, and the side that also helps secondary lens is fixed.
As shown in Figure 7, said concave curvatures 12 is the minimum point of bottom surface with the tie point i of incidence surface 11, and the light that sends of spot light 3 all appears light source utilization rate height through incidence surface 11 like this.
Embodiment 4
As shown in Figure 8, the tie point i of said concave curvatures 12 and incidence surface 11 is higher than the minimum point of bottom surface 1.
Embodiment 5
Said secondary lens is applied in the down straight aphototropism mode set, and this module backlight can straight-down negative or side entering type, can effectively reduce the usage quantity of LED, thereby practices thrift cost.
The secondary lens points of engagement light source of the utility model can be applicable to comprise in side entering type and the down straight aphototropism mode set in the module backlight of LCDs.As shown in Figure 9, secondary lens is applied in the down straight aphototropism mode set, and d is a reflector plate, and e is a spot light, and f is the utility model lens, and g is diffuser plate and film material, and h is TFT-LCD.Wherein light source e is a spot light, can be spot lights such as LED, laser.
Claims (9)
1. the bottom surface is the secondary lens of curved-surface structure; It is along central shaft rotation symmetry; It comprises bottom surface and the arc exiting surface that is connected with the bottom surface; It is located at the spot light top, it is characterized in that: said bottom surface comprises the incidence surface and the annular concave curved surface that is connected with this arcuation spill incidence surface of middle part arcuation spill.
2. bottom surface according to claim 1 is the secondary lens of curved-surface structure, it is characterized in that: the height of said incidence surface is greater than its bottom width, and the height of exiting surface is less than the width of its bottom surface;
When being the y axle with the central shaft, be the x axle with straight line vertical with central shaft and bottom surface minimum point excessively, when the intersection point of x axle and y axle is starting point,
Exiting surface is crossed the point coordinates of the curve in central shaft cross section, and (x y) satisfies: x
2+ y
2Value with | the increase of x| increases;
Incidence surface is crossed the point coordinates of the curve in central shaft cross section, and (x y) satisfies: x
2+ y
2Value with | the increase of x| reduces;
The bottom surface concave curvatures cross the curve in central shaft cross section point coordinates (x, y) satisfy: y earlier along with | x| increases and increases, behind the peak that increases to the bottom surface concave curvatures, y with | the increase of x| reduces.
3. bottom surface according to claim 1 is the secondary lens of curved-surface structure, it is characterized in that: said exiting surface center is provided with an inner concave, plane or convex surface.
4. bottom surface according to claim 1 is the secondary lens of curved-surface structure, it is characterized in that: the ratio H/L < 0.176 of the concave curvatures peak of said bottom surface apart from the distance H of bottom surface and concave curvatures peak to the distance L of central shaft; Said concave curvatures peak is L1 to the vertical range of the tie point of concave curvatures and incidence surface, and H/>L1 < 0.34.
5. bottom surface according to claim 1 is the secondary lens of curved-surface structure, it is characterized in that: said incidence surface and concave curvatures are a circle horizontal plane in the junction of bottom surface, and exiting surface and concave curvatures are a circle horizontal plane in the junction of bottom surface.
6. bottom surface according to claim 1 is the secondary lens of curved-surface structure, it is characterized in that: said exiting surface and bottom surface are a circle vertical plane in the junction of side.
7. bottom surface according to claim 1 is the secondary lens of curved-surface structure, it is characterized in that: the tie point of said concave curvatures and incidence surface is the minimum point of bottom surface.
8. bottom surface according to claim 1 is the secondary lens of curved-surface structure, it is characterized in that: the tie point of said concave curvatures and incidence surface is higher than the minimum point of bottom surface.
9. bottom surface according to claim 1 is the secondary lens of curved-surface structure, it is characterized in that: said secondary lens is PETG, Merlon, polymethyl methacrylate, polystyrene or glassware.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220317534 CN202629915U (en) | 2012-06-29 | 2012-06-29 | Secondary lens with bottom surface in curved surface structure |
| TW101220013U TWM446344U (en) | 2012-06-29 | 2012-10-17 | Backlight module and optical lens thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220317534 CN202629915U (en) | 2012-06-29 | 2012-06-29 | Secondary lens with bottom surface in curved surface structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202629915U true CN202629915U (en) | 2012-12-26 |
Family
ID=47383110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220317534 Expired - Lifetime CN202629915U (en) | 2012-06-29 | 2012-06-29 | Secondary lens with bottom surface in curved surface structure |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN202629915U (en) |
| TW (1) | TWM446344U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644488A (en) * | 2013-12-31 | 2014-03-19 | 东莞市亚星半导体有限公司 | Backlight module |
| CN106195916A (en) * | 2015-05-04 | 2016-12-07 | 全亿大科技（佛山）有限公司 | Lens |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI503581B (en) * | 2013-07-10 | 2015-10-11 | E Pin Optical Industry Co Ltd | Lens, light source device and direct type light source module |
-
2012
- 2012-06-29 CN CN 201220317534 patent/CN202629915U/en not_active Expired - Lifetime
- 2012-10-17 TW TW101220013U patent/TWM446344U/en unknown
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644488A (en) * | 2013-12-31 | 2014-03-19 | 东莞市亚星半导体有限公司 | Backlight module |
| CN103644488B (en) * | 2013-12-31 | 2015-11-04 | 东莞市亚星半导体有限公司 | A kind of backlight module |
| CN106195916A (en) * | 2015-05-04 | 2016-12-07 | 全亿大科技（佛山）有限公司 | Lens |
| CN106195916B (en) * | 2015-05-04 | 2019-11-01 | 全亿大科技（佛山）有限公司 | Lens |
Also Published As
| Publication number | Publication date |
|---|---|
| TWM446344U (en) | 2013-02-01 |
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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: 20121226 |