BACKGROUND OF THE INVENTION
Field of the Invention
[0001] The present invention relates to a lighting device, and in particular to an LED light
bulb.
THE PRIOR ARTS
[0002] In recent years, LED has been widely utilized as a light source in various sectors
of our daily life, due to its low energy consumption and long service life. As an
example, LED light bulb that can be placed directly on an ordinary light bulb socket
is developed to replace the conventional light bulb, such as a tungsten filament light
bulb.
[0003] Presently, a Hi-Power LED (hereinafter referred to as a HP LED) light bulb available
on the market includes: a copper head, a hood, an aluminum substrate, and a HP LED
installed thereon. The bottom of the aluminum substrate is fixed onto an aluminum
alloy heat dissipation device, the copper head is fixed onto the bottom of aluminum
alloy heat dissipation device, and the copper head is connected electrically to the
HP LED. The hood is installed and fixed onto the top end of the aluminum substrate
to cover over the HP LED. When the HP LED is activated for illumination, light produced
by HP LED can be emitted to outside through the hood, in achieving the purpose of
illumination. However, in the operation of the HP LED light bulb, the HP LED generates
large amount of heat, and that can only be dissipated through the aluminum alloy heat
dissipation device provided at the bottom of the aluminum substrate, so as to maintain
the normal operation of HP LED; otherwise, the heat thus generated could result in
shortening the service life of HP LED, or even burn-out of the HP LED light bulb.
Therefore, presently, for the HP LED light bulb, the HP LED is installed and fixed
onto an aluminum substrate, and a fin-shaped aluminum alloy heat dissipation device
is provided to dissipate heat. However, the weights of aluminum substrate and the
fin-shaped aluminum alloy heat dissipation device are rather heavy, and it occupies
a certain volume of the HP LED light bulb, thus making the existing HP LED light bulb
to have the shortcomings of heavy weight, large volume, and high production cost.
Furthermore, when utilized outdoors, it has the problems that the fin-shaped aluminum
alloy heat dissipation device can not be fitted tightly with the copper head, thus
it can not provide waterproof function.
[0004] Therefore, presently, the design and performance of the LED light bulb of the prior
art is not quite satisfactory, and it has much room for improvement.
SUMMARY OF THE INVENTION
[0005] In view of the problems and shortcomings of the prior art, the present invention
provides an LED light bulb, so as to overcome the problems of the prior art.
[0006] A major objective of the present invention is to provide an LED light bulb, wherein,
tiny and minute indent-protrusion texture structures are formed on the inner and outer
surfaces of a heat dissipation cup through sand-blasting and anodic treatments, thus
increasing the surface area of the cup to dissipate speedily the heat generated by
the LED, without the need to use an additional heat dissipation fin device of the
prior art.
[0007] Another objective of the present invention is to provide an LED light bulb, having
the advantages of small volume, light weight, simple structure, and low production
cost.
[0008] A yet another objective of the present invention is to provide an LED light bulb,
wherein. inner and outer surfaces of the heat dissipation cup are processed by anodic
treatment, thus being able to withstand the erosion of weather.
[0009] A further objective of the present invention is to provide an LED light bulb, such
that there is no need to provide a reflective element in the rear of LED circuit board,
hereby preventing the occurrence of halo.
[0010] A yet another objective of the present invention is to provide an LED light bulb,
having the advantages of good heat dissipation, water proof, aesthetical appearance,
and its cup glass will not break even when in contact with water at high temperature.
[0011] In order to achieve the above-mentioned objective, the present invention provides
an LED light bulb, comprising: a head portion; an insulation tube, with its bottom
screw-locked onto the head portion, and its inside is provided with a driver-circuit-board
component, one end of this component is connected electrically to the head portion;
a heat dissipation cup, disposed on said insulation tube, the inner and outer surfaces
of the heat dissipation cup are provided with indent-protrusion texture structures,
and its bottom is provided with at least two conduction-wire through- holes, on the
bottom surface of the cup is provided with an LED circuit board, and at least an HP
LED is provided thereon, the LED circuit board is connected electrically to the other
end of the driver-circuit-board component through the conduction-wire through-holes;
and a hood, provided on the top end of the heat dissipation cup.
[0012] Further scope of the applicability of the present invention will become apparent
from the detailed description given hereinafter. However, it should be understood
that the detailed description and specific examples, while indicating preferred embodiments
of the present invention, are given by way of illustration only, since various changes
and modifications within the spirit and scope of the present invention will become
apparent to those skilled in the art from this detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The related drawings in connection with the detailed description of the present invention
to be made later are described briefly as follows, in which:
[0014] Fig. 1 is a perspective view of the LED light bulb according to an embodiment of
the present invention;
[0015] Fig. 2 is a perspective view of the LED light bulb according to an embodiment of
the present invention after the convex lens is removed;
[0016] Fig. 3 is an exploded view of elements of the LED light bulb according to an embodiment
of the present invention as viewed from top;
[0017] Fig. 4 is an exploded view of elements of the LED light bulb according to an embodiment
of the present invention as viewed from bottom;
[0018] Fig. 5 is a cross section view of the LED light bulb according to an embodiment of
the present invention;
[0019] Fig. 6 is a perspective view of the LED light bulb according to another embodiment
of the present invention;
[0020] Fig. 7 is a side view of the LED light bulb according to another embodiment of the
present invention; and
[0021] Fig. 8 is an exploded view of elements of the LED light bulb according to another
embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0022] The purpose, construction, features, functions and advantages of the present invention
can be appreciated and understood more thoroughly through the following detailed descriptions
with reference to the attached drawings.
[0023] Refer respectively to Fig. 1 for a perspective view of the LED light bulb according
to an embodiment of the present invention; Fig. 2 for a perspective view of the LED
light bulb according to an embodiment of the present invention after the convex lens
is removed; Fig. 3 for an exploded view of elements of the LED light bulb according
to an embodiment of the present invention as viewed from top; Fig. 4 for an exploded
view of elements of the LED light bulb according to an embodiment of the present invention
as viewed from bottom; and Fig. 5 for a cross section view of the LED light bulb according
to an embodiment of the present invention.
[0024] As shown in Figs. 1 to 5, the LED light bulb 10 includes: a head portion 14, which
is made of copper and is provided with the first screw thread 12 on its inner surface;
an insulation tube 16, with its bottom end formed with the second screw thread 18
corresponding to the first screw thread 12, so that the insulation tube 16 can be
screw-locked onto the head portion 14, and two lock-and-fix holes 19 are formed on
the top end of the insulation tube 16; a driver-circuit-board component 20 disposed
inside the insulation tube 16 and with its one end connected electrically to the head
portion 14; a heat dissipation cup 22, provided on the top end of the insulation tube
16, the inner and outer surfaces of the cup are provided with indent-protrusion texture
structures 21 formed through sand-blasting and anodic treatments, and the bottom surface
23 of the heat dissipation cup 22 is provided with at least two conduction-wire through-holes
24 and two positioning holes 25; an LED circuit board 27, having at least a Hi-power
LED 26 disposed thereon, and it is glued on the bottom surface 23 of the heat dissipation
cup 22, with its size smaller than that of the bottom surface 23 of the cup 22, the
conduction wires 28 connects the LED circuit board 27 electrically to the other end
of driver-circuit-board component 20 through the conduction-wire through-holes 24,
two opposite side rims of LED circuit board 27 are provided with two positioning slots
29, such that two lock-and-fix pieces 31 can pass through the positioning slots 29
and positioning holes 25 and are locked and fixed onto the lock-and-fix holes 19,
so as to position the LED circuit board 27 onto the bottom surface 23 of the cup 22,
and lock and fix the heat dissipation cup 22 onto the insulation tube 16; and a convex
lens 30 placed on the top end of the heat dissipation cup 22.
[0025] The LED light bulb of the present invention further includes a ring-shape decoration
plate 32, having its bottom surface provided with two positioning columns 33. The
decoration plate positioning holes 34 corresponding to the positioning columns 33
are formed on the bottom surface 23 of the heat dissipation cup 22, for allowing the
ring-shape decoration plates 32 to be placed onto the LED circuit board 27, and then
being pressed to fasten and fix onto the bottom surface 23 of the cup 22 through the
positioning columns 33, hereby shielding the lock-and-fix piece 31 and the circuits
connected electrically to LED circuit board 27, and giving an aesthetical appearance.
[0026] Moreover, a first heat resistance water-proof plastic ring 36 is disposed between
the insulation tube 16 and the heat dissipation cup 22, and a second heat resistance
water-proof plastic ring 38 is disposed between the convex lens 30 and the heat dissipation
cup 2, hereby preventing moisture from seeping into inside the LED light bulb 10.
[0027] In the present invention, tiny and minute indent-protrusion texture structures are
formed on the inner and outer surfaces of a heat dissipation cup through sand-blasting
and anodic treatments, thus increasing the surface area of the cup to dissipate speedily
the heat generated by the HP-LED, without the need to use an additional heat dissipation
fin device of the prior art, thus reducing the overall volume, weight, and production
cost of the LED light bulb. In addition, the inner and outer surfaces of the heat
dissipation cup are processed by anodic treatment, so it can withstand the erosion
of weather. Furthermore, since the inner and outer surfaces of the heat dissipation
cup are processed by anodic treatment, so there is no need to provide a reflective
element in the rear of LED circuit board, hereby preventing the occurrence of halo.
[0028] Summing up the above, the present invention provides an LED light bulb, having the
advantages of light weight, water proof, good heat dissipation, aesthetical appearance,
no halo in the emitted light, and its cup glass will not break when in contact with
water at high temperature.
[0029] Moreover, refer to Fig. 6 for a perspective view of the LED light bulb according
to another embodiment of the present invention; Fig. 7 for a side view of the LED
light bulb according to another embodiment of the present invention; and Fig. 8 for
an exploded view of elements of the LED light bulb according to another embodiment
of the present invention respectively. The difference of this embodiment and the previous
embodiment is that, in the present embodiment, a semi-hemispherical hood 40 is used
to replace the convex lens, thus changing the illumination shape of the LED light
bulb.
[0030] The above detailed description of the preferred embodiment is intended to describe
more clearly the characteristics and spirit of the present invention. However, the
preferred embodiments disclosed above are not intended to be any restrictions to the
scope of the present invention. Conversely, its purpose is to include the various
changes and equivalent arrangements which are within the scope of the appended claims.
1. An LED light bulb, comprising:
a head portion;
an insulation tube, with its bottom end screw-locked onto said head portion;
a driver-circuit-board component, provided in said insulation tube, one end of said
driver-circuit-board component is connected electrically to said head portion;
a heat dissipation cup, disposed on said insulation tube, inner and outer surfaces
of
said heat dissipation cup are provided with indent-protrusion texture structures,
and a bottom surface of said heat dissipation cup is provided with at least two conduction-wire
through-holes;
an LED circuit board, on its surface is provided with at least a Hi-Power LED,
said LED circuit board is provided on said bottom surface of said heat dissipation
cup, and it is connected electrically to an other end of said driver-circuit-board
component through said conduction-wire through-holes; and
a hood, provided on top end of said heat dissipation cup.
2. The LED light bulb as claimed in claim 1, wherein said head portion is made of copper.
3. The LED light bulb as claimed in claim 1, further comprising:
a decoration plate, having its bottom surface provided with two positioning columns,
and decoration plate positioning holes corresponding to said positioning columns are
formed on said bottom surface of said heat dissipation cup, for placing said decoration
plate onto said LED circuit board, and then pressing to fasten and fix it onto said
bottom surface of said heat dissipation cup through said positioning columns.
4. The LED light bulb as claimed in claim 1, wherein two lock-and-fix holes are provided
on a front end of said insulation tube, two positioning holes are provided on said
bottom surface of said heat dissipation cup, and two positioning slots are provided
on said LED circuit board, such that two lock-and-fix pieces can pass through said
positioning slots and said positioning holes to lock and fix onto said lock-and-fix
holes, so as to position said LED circuit board onto said bottom surface of said heat
dissipation cup , and lock and fix said heat dissipation cup onto said insulation
tube.
5. The LED light bulb as claimed in claim 1, further comprising:
a first heat resistance water-proof plastic ring is disposed between said insulation
tube and said heat dissipation cup, hereby preventing moisture from seeping into inside
said LED light bulb.
6. The LED light bulb as claimed in claims 1 or 5, further comprising:
a second heat resistance water-proof plastic ring is disposed between said hood and
the heat dissipation cup, hereby preventing moisture from seeping into inside said
LED light bulb.
7. The LED light bulb as claimed in claim 1, wherein said hood is a convex lens.
8. The LED light bulb as claimed in claim 1, wherein said hood is of a semi-hemisphere
shape.
9. The LED light bulb as claimed in claim 1, wherein said indent-protrusion texture structures
are formed through sand-blasting and anodic treatments.