U.S. patent application number 14/929382 was filed with the patent office on 2017-05-04 for concentrating lens of a light emitting diode lamp.
The applicant listed for this patent is ARTLED TECHNOLOGY CORP.. Invention is credited to Chan-Ching Lin.
Application Number | 20170125652 14/929382 |
Document ID | / |
Family ID | 58615793 |
Filed Date | 2017-05-04 |
United States Patent
Application |
20170125652 |
Kind Code |
A1 |
Lin; Chan-Ching |
May 4, 2017 |
CONCENTRATING LENS OF A LIGHT EMITTING DIODE LAMP
Abstract
Provided is a concentrating lens of a light emitting diode lamp
comprising a lens body. The lens body comprises a top portion, a
bottom portion opposite the top portion, a light output surface
positioned on the top portion, an optical surface formed concavely
on the light output surface, and a light input surface concavely
formed on the bottom portion and towards the top portion. The light
input surface is disposed on a same axis with the optical surface.
The light input surface comprises a light input side plane and a
light input concave plane connected with the light input side
plane. The concentrating lens is capable of distributing the light
of LED to positions on each of the side walls of a light box close
to and distal from the LED, and allowing the light emitted from the
LED to lighten the light box uniformly.
Inventors: |
Lin; Chan-Ching; (New Taipei
City, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
ARTLED TECHNOLOGY CORP. |
New Taipei City |
|
TW |
|
|
Family ID: |
58615793 |
Appl. No.: |
14/929382 |
Filed: |
November 1, 2015 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F21Y 2115/10 20160801;
F21V 5/04 20130101; F21Y 2103/10 20160801; G02B 17/00 20130101;
H01L 33/58 20130101; G02B 19/0061 20130101; G02B 5/0215 20130101;
G02B 19/0028 20130101; F21V 7/0091 20130101 |
International
Class: |
H01L 33/58 20060101
H01L033/58; F21V 5/04 20060101 F21V005/04 |
Claims
1. (canceled)
2. A concentrating lens of a light emitting diode lamp comprising:
a lens body comprising: a top portion; a bottom portion opposite
the top portion; a light output surface positioned on the top
portion; an optical surface formed concavely on the light output
surface; a light input surface concavely formed on the bottom
portion and towards the top portion, wherein the light input
surface is positioned on a same axis with the optical surface and
comprises: a light input side plane; and a light input concave
plane connected with the light input side plane; and a top recess
surrounded by the optical surface and comprising: a top opening
connected with the light output surface; a recess base opposite the
top opening; and a width decreasing gradually from the top opening
to the recess base.
3. The concentrating lens as claimed in claim 2, wherein a ratio of
a width of the top opening to a width of the recess base ranges
from 1:2 to 1:3.5.
4. The concentrating lens as claimed in claim 2, wherein a distance
between the light input concave plane and the recess base ranges
from 1 mm to 3 mm.
5. The concentrating lens as claimed in claim 3, wherein a distance
between the light input concave plane and the recess base ranges
from 1 mm to 3 mm.
6. (canceled)
7. The concentrating lens as claimed in claim 5, wherein the light
input side plane comprises: an inner end connected with the light
input concave plane; and an outer end opposite the inner end; and
the lens body further comprises a bottom groove surrounded by the
light input side plane and comprising: a bottom opening surrounded
by the outer end; an end opening surrounded by the inner end; and a
width decreasing gradually from the bottom opening to the end
opening
8. (canceled)
9. The concentrating lens as claimed in claim 7, wherein a ratio of
a width of the end opening to a width of the bottom opening ranges
from 1:1.1 to 1:2.
10. The concentrating lens as claimed in claim 2, wherein the
optical surface is a conical surface.
11. The concentrating lens as claimed in claim 9, wherein the
optical surface is a conical surface.
12. The concentrating lens as claimed in claim 2, wherein the light
input concave plane is a circular concave plane.
13. The concentrating lens as claimed in claim 11, wherein the
light input concave plane is a circular concave plane.
14. The concentrating lens as claimed in claim 2, wherein the light
output surface comprises a wavy structure.
15. The concentrating lens as claimed in claim 13, wherein the
light output surface comprises a wavy structure.
16. The concentrating lens as claimed in claim 2, wherein a width
of the top portion is larger than a width of the bottom portion,
the lens body further comprises a body side surface connected
between the top portion and the bottom portion, and the body side
surface is a slanting surface.
17. The concentrating lens as claimed in claim 15, wherein a width
of the top portion is larger than a width of the bottom portion,
the lens body further comprises a body side surface connected
between the top portion and the bottom portion, and the body side
surface is a slanting surface.
18. The concentrating lens as claimed in claim 2, wherein the
concentrating lens further comprises a supporting wall disposed
around the lens body, the supporting wall comprises a connecting
portion connected with the top portion of the lens body, and the
connecting portion is spaced from the bottom portion.
19. The concentrating lens as claimed in claim 17, wherein the
concentrating lens further comprises a supporting wall disposed
around the lens body, the supporting wall comprises a connecting
portion connected with the top portion of the lens body, and the
connecting portion is spaced from the bottom portion and the body
side surface.
20. The concentrating lens as claimed in claim 19, wherein the
supporting wall and the lens body are formed as one piece, and the
supporting wall is translucent.
Description
BACKGROUND
[0001] 1. Technical Field
[0002] The present invention relates to a concentrating lens of a
light emitting diode (LED) lamp.
[0003] 2. Description of the Prior Art(s)
[0004] As an LED is high in luminous efficiency, durable in service
life, and has no toxic substances, the LED lamp replaces the
conventional fluorescent lamp to be the light source of the light
box.
[0005] With reference to FIGS. 9 to 12, to project the light
emitted from an LED 70 to the two opposite side walls 61 of the
light box 60, the LED lamp comprises a concentrating lens 50. The
concentrating lens 50 comprises a top 51, a bottom 52, a light
output surface 53 disposed on the top 51, a light input surface 54
disposed on the bottom 52, and a recess 55. The light input surface
54 comprises a convex plane 541 and a surrounding plane 542
connected with the convex plane 541. The recess 55 is formed
concavely on the bottom 52 and towards the top 51. The recess 55 is
surrounded by the light input surface 54. The recess 55 comprises a
bottom opening 551 surrounded by the surrounding plane 542.
[0006] As shown in FIGS. 9, and 11 to 13, the LED 70 and the
concentrating lens 50 are mounted on an end wall of the light box
60. The LED 70 faces the light input surface 54. After the light
emitted by the LED 70 enters the concentrating lens 50 via the
light input surface 54, the light departs from the concentrating
lens 50 via the light output surface 55 and is distributed on the
side walls 61 of the light box 60 for lighting up the light box
60.
[0007] However, the concentrating lens 50 concentrates the light
emitted by the LED 70 only to the position on each of the side
walls 61 distal from the LED 70; the concentrating lens 50 hardly
distributes the light to the position on each of the side walls 61
close to the LED 70. Therefore, the concentrating lens 50 is
incapable of allowing the light emitted from the LED 70 to light up
the light box 60 uniformly.
[0008] To overcome the shortcomings, the present invention provides
a concentrating lens of a light emitting diode lamp to mitigate or
obviate the aforementioned problems.
SUMMARY
[0009] The objective of the present invention is to provide a
concentrating lens of a light emitting diode lamp. The
concentrating lens is capable of distributing the light emitted by
the LED to the positions on each of the side walls of a light box
close to and distal from the LED simultaneously, and allowing the
light emitted from the LED to light up the light box uniformly.
[0010] The concentrating lens of a light emitting diode lamp in
accordance with the present invention comprises a lens body. The
lens body comprises a top portion; a bottom portion opposite the
top portion; a light output surface positioned on the top portion;
an optical surface formed concavely on the light output surface;
and a light input surface concavely formed on the bottom portion
and towards the top portion. The light input surface is positioned
on a same axis with the optical surface. The light input surface
comprises a light input side plane and a light input concave plane
connected with the light input side plane.
[0011] Preferably, the lens body comprises a top recess surrounded
by the optical surface. The top recess comprises a top opening
connected with the light output surface, a recess base opposite the
top opening, and a width decreasing gradually from the top opening
to the recess base.
[0012] More preferably, a ratio of a width of the top opening to a
width of the recess base ranges from 1:2 to 1:3.5.
[0013] More preferably, a distance between the light input concave
plane and the recess base ranges from 1 mm to 3 mm.
[0014] Preferably, the light input side plane comprises an inner
end connected with the light input concave plane and an outer end
opposite the inner end. The lens body further comprises a bottom
groove surrounded by the light input side plane. The bottom groove
comprises a bottom opening surrounded by the outer end, an end
opening surrounded by the inner end, and a width decreasing
gradually from the bottom opening to the end opening
[0015] More preferably, a ratio of a width of the end opening to a
width of the bottom opening ranges from 1:1.1 to 1:2.
[0016] Preferably, a width of the top portion is larger than a
width of the bottom portion, the lens body further comprises a body
side surface connected between the top portion and the bottom
portion, and the body side surface is a slanting surface.
[0017] Preferably, the concentrating lens further comprises a
supporting wall disposed around the lens body, the supporting wall
comprises a connecting portion connected with the top portion of
the lens body, and the connecting portion is spaced from the bottom
portion and the body side surface.
[0018] More preferably, the supporting wall and the lens body are
formed as one piece, and the supporting wall is translucent.
[0019] Preferably, the optical surface is a conical surface and the
light input concave plane is a circular concave plane.
[0020] By the light input concave plane of the light input surface
and the optical surface, the concentrating lens effectively
distributes the light emitted by the LED to the positions on each
of the side walls of a light box not only distal from, but also
close to the LED, thereby allowing the LED to light up the light
box uniformly.
[0021] Other objectives, advantages, and novel features of the
invention will become more apparent from the following detailed
description when taken in conjunction with the accompanying
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] FIG. 1 is a perspective view of a concentrating lens of a
light emitting diode lamp in accordance with the present
invention;
[0023] FIG. 2 is a cross sectional side view of the concentrating
lens in FIG. 1;
[0024] FIG. 3 is a partial cross sectional side view of the
concentrating lens in FIG. 1;
[0025] FIG. 4 is a schematic view showing an operational state of
the concentrating lens in FIG. 1;
[0026] FIG. 5 is a schematic view showing an operational state of
the concentrating lens in FIG. 1;
[0027] FIG. 6 is an enlarged view of an encircled area I in FIG.
5;
[0028] FIG. 7 is a schematic view showing an operational state of
the concentrating lens in FIG. 1;
[0029] FIG. 8 is a schematic view showing an operational state of
the concentrating lens in FIG. 1;
[0030] FIG. 9 is a perspective view of a concentrating lens in
accordance with the prior art;
[0031] FIG. 10 is a cross sectional side view of the concentrating
lens in FIG. 9;
[0032] FIG. 11 is a schematic view showing an operational state of
the concentrating lens in FIG. 9;
[0033] FIG. 12 is an enlarged view of an encircled area II in FIG.
11; and
[0034] FIG. 13 is a schematic view showing an operational state of
the concentrating lens in FIG. 9.
DETAILED DESCRIPTION
[0035] With reference to FIG. 1, a concentrating lens 1 of a light
emitting diode lamp in accordance with the present invention
comprises a lens body 10 and a supporting wall 20.
[0036] With reference to FIGS. 1 and 2, the lens body 10 is
translucent. The lens body 10 comprises a top portion 11, a bottom
portion 12 opposite the top portion 11, a body side surface 13, a
light output surface 14 positioned on the top portion 11, an
optical surface 15, a top recess 16, a light input surface 17, and
a bottom groove 18. The width of the top portion 11 is larger than
the width of the bottom portion 12. The body side surface 13 is
connected between the top portion 11 and the bottom portion 12. The
body side surface 13 is a slanting surface. The light output
surface 14 comprises a wavy structure 141.
[0037] With reference to FIGS. 1 to 3, the optical surface 15 is
formed concavely at the center of the light output surface 14 and
towards the bottom portion 12. The top recess 16 is surrounded by
the optical surface 15. The top recess 16 comprises a top opening
161 connected with the light output surface 14 and a recess base
162 opposite the top opening 161. The top recess 16 has a width
decreasing gradually from the top opening 161 to the recess base
162. Further, the optical surface 15 is a pyramidal surface or a
conical surface, and the top recess 16 is an inverted pyramidal
recess or an inverted conical recess. In an embodiment, as shown in
FIGS. 1 to 3, the optical surface 15 is a conical surface and the
top recess 16 is an inverted conical recess. The top opening 161
has a width A of 2.58 mm. The top recess 16 has a depth B of 7.18
mm. The ratio of the width A of the top opening 161 to the depth B
of the top recess 16 is 1:2.783.
[0038] With reference to FIGS. 2 and 3, the light input surface 17
is concavely formed on the bottom portion 12 and towards the top
portion 11. The light input surface 17 and the light output surface
14 are coaxial. The light input surface 17 comprises a light input
side plane 171 and a light input concave plane 172. The light input
side plane 171 comprises an inner end and an outer end opposite the
inner end. The light input concave plane 172 is connected with the
inner end. In an embodiment, the light input concave plane 172 is a
circular concave plane. A distance C between the light input
concave plane 172 and the recess base 162 is 1.6 mm.
[0039] With reference to FIGS. 2 and 3, the bottom groove 18 is
surrounded by the light input side plane 171. The bottom groove 18
comprises a bottom opening 181 surrounded by the outer end of the
light input side plane 171 and an end opening 182 surrounded by the
inner end of the light input side plane 171. The bottom groove 18
has a width decreasing gradually from the bottom opening 181 to the
end opening 182. In an embodiment, a width D of the end opening 182
is 5.21 mm and a width E of the bottom opening 181 is 7.20 mm. The
ratio of the width D of the end opening 182 and the width E of the
bottom opening 181 is 1:1.382. The bottom groove 18 is a circular
groove.
[0040] With reference to FIGS. 1 and 2, the supporting wall 20 is
disposed around the lens body 10. The supporting wall 20 comprises
a connecting portion 21 connected with the top portion 11 of the
lens body 10. The connecting portion 21 is spaced from the bottom
portion 12 of the lens body 10 and the body side surface 13 of the
same. With reference to FIG. 2, in an embodiment, the supporting
wall 20 and the lens body 10 are formed as one piece. The
supporting wall 20 is translucent.
[0041] With reference to FIGS. 4 to 7, multiple said concentrating
lenses 1 are disposed on an end or two ends of a light box 30, and
the concentrating lenses 1 are spaced from each other. With
reference to FIGS. 2, 4, to 6, and 8, multiple LEDs 40 are disposed
at the bottom openings 181 of the concentrating lenses 1
respectively. Each of the LEDs 40 faces a corresponding light input
concave plane 172. After entering each of the concentrating lenses
1 via the light input concave plane 172 and guided in the direction
to the two sides of each of the concentrating lenses, the light
emitted by each of the LEDs 40 departs from each of the
concentrating lenses 1 via the wavy structure 141 of the light
output surface 14. Then the light emitted by each of the LEDs 40
illuminates the positions on each of the side walls 31 of the light
box 30 distal from each of the LEDs 40, and the positions on each
the side walls 31 of the light box 30 close to each of the LEDs 40
also. In short, the light emitted by each of the LEDs 40 is
distributed on the side walls 31 of the light box 30 uniformly, and
the light box 30 is lighted uniformly.
[0042] Further, light emitted by each of the LEDs 40, entering each
of the concentrating lenses 1 via the light input concave plane
172, and arriving at the optical surface 15 is allowed to be
reflected by the optical surface 15. After reflection, the light
illuminates position on each of the side walls 31 of the light box
30 distal from each of the LEDs 40, and the position on each of the
side walls 31 of the light box 30 close to each of the LEDs 40
also, thereby the lighting uniformity of the light box 30 is
enhanced.
[0043] To sum up, the concentrating lens 1 distributes the light of
the LED 40 to the positions on each of the side walls 31 of a light
box 30 close to and distal from the LED 40 simultaneously, and
allows the light to illuminate the light box 30 uniformly.
[0044] Even though numerous characteristics and advantages of the
present invention have been set forth in the foregoing description,
together with details of the structure and features of the
invention, the disclosure is illustrative only. Changes may be made
in the details, especially in matters of shape, size, and
arrangement of parts within the principles of the invention to the
full extent indicated by the broad general meaning of the terms in
which the appended claims are expressed.
* * * * *