[Field of the Invention]
[0001] The present invention relates to an illumination device using an LED light source
and an illumination fixture using the illumination device.
[Background Art]
[0002] An illumination device using an LED light source has been conventionally known (refer
to, for example, Non-Patent Document 1).
An illumination fixture described in Non-Patent Document 1 is a round ceiling light,
and includes one power source block that converts commercial power into a DC output
and four LED units as illumination devices in which an LED is mounted on a printed
circuit substrate.
[0003] The LED units are fan-shaped and the four LED units are combined with one another
to form a circle as a whole. The LED units include two types of LED units. A first
type of LED unit is an LED unit provided with a connector for connecting the LED as
a light source to the adjacent LED unit. A second type of LED unit is an LED unit
provided with a connector for receiving power from the power source block in the first
LED unit.
Each illumination fixture includes the three first type of LED units and the one second
type of LED unit.
[Conventional Technique Document]
[Non-Patent Document]
[Disclosure of the Invention]
[Problems to be solved by the Invention]
[0005] However, the above-mentioned conventional illumination fixture adopts the two types
of LED units, and the LED units need to be separately manufactured according to the
type. Further, plural product numbers are managed, disadvantageously leading to an
increase in manufacturing and management costs.
[0006] The present invention is made to solve the conventional problems, and its object
is to reduce manufacturing and management costs of an illumination device including
an LED light source to provide inexpensive illumination device and illumination fixture.
[Means adapted to solve the Problems]
[0007] An illumination device according to the present invention includes at least one LED
light source, a first terminal part electrically connected to an anode side of the
LED light source, a second terminal part electrically connected to an cathode side
of the LED light source, and an LED substrate on which the LED light source, the first
terminal part, and the second terminal part are mounted, and the first terminal part
is different from the second terminal part in external appearance.
[0008] An illumination device according to the present invention includes at least one LED
light source, a first terminal part electrically connected to an anode side of the
LED light source, a second terminal part electrically connected to an cathode side
of the LED light source, and an LED substrate on which the LED light source, the first
terminal part, and the second terminal part are mounted, the first terminal part and
the second terminal part adopts the same connector, and a pin number of the connector
connected to the anode side of the LED light source is different from a pin number
of the connector connected to the cathode side of the LED light source.
[0009] In the illumination device of the present invention, the first terminal part is different
from the second terminal part in external appearance color.
[0010] In the illumination device of the present invention, the two or more LED light sources
are provided.
[0011] In the illumination device of the present invention, two or more types of the LED
light sources are provided.
[0012] The illumination fixture of the present invention uses the above-mentioned illumination
device.
[Effect of the Invention]
[0013] According to the present invention, since the first terminal part electrically connected
to the anode side of the LED light source is different from the second terminal part
electrically connected to the cathode side of the LED light source, wrong connection
at assembling can be prevented. As a result, it is possible to provide the illumination
device and the illumination fixture, in which the type of the illumination device
can be made uniform, thereby reducing manufacturing and management costs.
[Brief Description of the Drawings]
[0014]
[Fig. 1] An exploded perspective view of an illumination fixture according to a first
embodiment of the present invention when viewed from below.
[Fig. 2] A sectional view taken along the center of the illumination fixture according
to the first embodiment of the present invention.
[Fig. 3] A circuit diagram of an LED unit according to the first embodiment of the
present invention.
[Fig. 4] A component arrangement view of the LED unit according to the first embodiment
of the present invention.
[Fig. 5] A connection view in the illumination fixture according to the first embodiment
of the present invention.
[Fig. 6] A circuit diagram of an LED unit according to a second embodiment of the
present invention.
[Fig. 7] A connection view in the illumination fixture according to the second embodiment
of the present invention.
[Best Mode for Carrying Out the Invention]
(First Embodiment)
[0015] An illumination device and an illumination fixture according to a first embodiment
of the present invention will be described below with reference to figures.
A case where the illumination fixture is attached to a ceiling surface as an attached
surface and illuminates downward will be described below. Unless expressly stated
otherwise, upper (upward, upper side, and the like) means the side of the ceiling
surface, lower (downward, lower side, and the like) means the side of a floor surface.
[0016] As shown in Fig. 1, an illumination fixture 10 according to the first embodiment
of the present invention is suited to be attached to a ceiling surface 11 and the
like as the attached surface to mainly illuminate downward.
As shown in Fig. 2, the illumination fixture 10 has, for example, a round fixture
body 20 to be attached to the ceiling surface 11. A hook ceiling 12 is attached to
the ceiling surface 11, and the fixture body 20 has a power feeding part 21 to be
attached to the hook ceiling 12 at its center.
[0017] A power source part 22 connected to the power feeding part 21 is provide on an upper
surface (that is, on the side of the ceiling surface 11) of the fixture body 20. Accordingly,
the power feeding part 21 receives electric power (AC) from a commercial power source
and feeds the power to the power source part 22, and the power source part 22 converts
the AC power into a DC output and feeds the DC output to LED units 30.
The four LED units 30 as fan-like illumination devices are arranged on the underside
(that is, on the side of an illuminating direction) of the fixture body 20 to form
a circle. A translucent lens 23 for effectively extracting light from LED light sources
31 (refer to Fig. 3) mounted on the each LED unit 30 are attached in front of (that
is, in Fig. 2, below) the LED unit 30. A cover 24 for diffusing received light is
attached in front of the lens 23.
[0018] Next, the LED unit 30 as the illumination device will be described.
As shown in Fig. 3, the LED unit 30 has two or more types of the LED light sources
31. Here, white LED light sources 311 and warm white LED light sources 312 are used.
The white LED light sources 311 and the warm white LED light sources 312 may be collectively
referred to as "LED light sources 31".
[0019] Fig. 3 is a circuit diagram of each of the LED units 30. In each of the LED units
30, four sets of the six serially-connected LED light sources 31 are connected to
one another in parallel. An anode side of the LED light sources 31 (left side in Fig.
3) is connected to an anode-side connector 321 as a first terminal part. A cathode
side (right side in Fig. 3) is connected to a cathode-side connector 322 as a second
terminal part. The white LED light sources 311 are connected to the warm white LED
light sources 312 by means of another circuit.
[0020] The anode-side connector 321 and the cathode-side connector 322 are different from
each other in external appearance.
That is, the anode-side connector 321 is a 4-pin connector, and a first pin is connected
to the anode side of the warm white LED light sources 312. A fourth pin is connected
to the anode side of the white LED light sources 311.
The cathode-side connector 322 is a 3-pin connector, and a third pin is connected
to the cathode side of the warm white LED light sources 312, and a first pin is connected
to the cathode side of the white LED light sources 311.
It is desired that the anode-side connector 321 and the cathode-side connector 322
have different external appearance color.
[0021] As shown in Fig. 4, each of the LED units 30 includes the white LED light sources
311, the warm white LED light sources 312, the anode-side connector 321, and the cathode-side
connector 322, all of which are mounted on a printed circuit substrate 33 as an LED
substrate.
The printed circuit substrate 33 is made of, for example, resin or metal such as aluminum,
is shaped like a fan, and has a thickness of about 1.0 mm.
Although the one LED unit 30 is described as a illumination device herein, the plurality
of LED units 30 are combined to constitute one illumination device.
[0022] The white LED light sources 311 and the warm white LED light sources 312 are arranged
in an inner row and an outer row along an arc of the printed circuit substrate 33
such that both the rows are substantially parallel to each other.
The 26 LED light sources 31 in the outer row and the 22 LED light sources 31 in the
inner row, that is, the 48 LED light sources 31 in total are arranged. The white LED
light source 311 and the warm white LED light source 312 are alternately arranged.
[0023] By arranging the LED light sources in this manner, a distance between the LED light
sources 31 of the same color becomes substantially uniform, thereby preventing light
irregularity.
The anode-side connector 321 and the cathode-side connector 322 are arranged at respective
ends of the printed circuit substrate 33.
Accordingly, the length of an electric wire used for connection between the adjacent
LED units 30 can be decreased.
[0024] Fig. 5 is a connection view in a case where the four LED units 30 are used in the
illumination fixture 10 (refer to Fig. 1).
As shown in Fig. 5, LED units 30A, 30B, 30C, 30D are connected to the power source
part 22. The power source part 22 has two lines of DC output.
One of the lines is an output from a first connector 221, which serves to light the
white LED light sources 311 mounted in the LED unit 30A, 30B, 30C, 30D. The other
line is an output from a second connector 222, which serves to light the warm white
LED light sources 312 mounted in the LED unit 30A, 30B, 30C, 30D.
[0025] Next, connection of the white LED light source 311 will be described.
As shown in Fig. 5, a fourth pin of an anode-side connector 321A of the LED unit 30A
is connected to an anode terminal 221A of the first connector 221 of the power source
part 22.
Next, a first pin of a cathode-side connector 322A of the LED unit 30A is connected
to a fourth pin of a anode-side connector 321B of the LED unit 30B.
[0026] Similarly, the LED units 30B, 30C, 30D are connected.
The LED units 30A, 30B, 30C, 30D are connected with one another with use of a harness
34.
Finally, a first pin of a cathode-side connector 322D of the LED unit 30D is connected
to a cathode terminal 221K of the first connector 221 of the power source part 22.
[0027] As shown in Fig. 5, to connect the warm white LED light sources 312, first an anode
terminal 222A of the second connector 222 of the power source part 22 is connected
to a first pin of the anode-side connector 321A of the LED unit 30A.
Next, a third pin of the cathode-side connector 322A of the LED unit 30A is connected
to a first pin of the anode-side connector 321B of the LED unit 30B.
[0028] Similarly, the LED unit 30B is connected to the LED unit 30C, and the LED unit 30C
is connected to the LED unit 30D.
The LED units 30A, 30B, 30C, 30D are connected to one another with use of the harness
34.
Finally, a third pin of the cathode-side connector 322D of the LED unit 30D is connected
to a cathode terminal 222K of the second connector 222 of the power source part 22.
[0029] In the LED unit 30 as the illumination device and the illumination fixture 10 in
the first embodiment, although the 4-pin anode-side connector 321 and the 3-pin cathode-side
connector 322 are adopted as connectors 32 used in each LED unit 30, the connectors
32 are not limited to these and may be other connectors that are different from each
other in the number of pins.
[0030] Connectors that are same as each other in the number of pins but are different from
each other in manufacturer or type can be adopted as the connectors 32.
Alternatively, the anode-side connector 321 and the cathode-side connector 322 that
have different colors can be adopted as the connectors 32.
[0031] In the above-mentioned LED unit 30 according to the first embodiment of the present
invention, the anode-side connector 321 electrically connected to the anode side of
the LED light sources 31 is different from the cathode-side connector 322 electrically
connected to the cathode side of the LED light sources 31.
For this reason, since wrong connection at assembling can be prevented and the type
of the LED units 30 can be made uniform, manufacturing and management costs can be
reduced.
[0032] The color of the anode-side connector 321 electrically connected to the anode side
of the LED light sources 31 is different from that of the cathode-side connector 322
as the second terminal part electrically connected to the cathode side of the LED
light sources 31.
This can prevent wrong connection at assembling.
[0033] Since the two or more LED units 30 are provided, illumination having a sufficient
brightness can be achieved.
[0034] Since the two or more types of LED light sources 31 are used, various light distributions
can be achieved.
[0035] Further, in the illumination fixture 10 according to the first embodiment of the
present invention, since the above-mentioned LED units 30 are used, the type of the
LED units 30 can be made uniform, thereby manufacturing and management costs can be
reduced.
(Second Embodiment)
[0036] Next, an illumination device and an illumination fixture according to a second embodiment
of the present invention will be described with reference to figures.
The same sections as those in the illumination device (LED unit) 30 and the illumination
fixture 10 according to the first embodiment are given the same reference numerals
and description thereof is omitted.
[0037] The illumination fixture 10B according to the second embodiment has the same configuration
as the illumination fixture 10 described with reference to Fig. 1 and Fig. 2. Although
an LED unit 40 is similar to the LED unit shown in the component arrangement view
of Fig. 4, connectors 41 are different from the connectors 32 in the first embodiment
and thus, the connectors 41 will be mainly described. The other configuration is the
same as the configuration of the LED unit 30.
[0038] As shown in Fig. 6, in the LED unit 40 according to the second embodiment, the same
connectors 41 are used as an anode-side connector 411 and a cathode-side connector
412.
The anode-side connector 411 has four pins, and a first pin is connected to the anode
side of the warm white LED light sources 312. A fourth pin is connected to the anode
side of the white LED light sources 311.
The cathode-side connector 412 also has four pins, and a third pin is connected to
the cathode side of the warm white LED light sources 312. A second pin is connected
to the cathode side of the white LED light sources 311.
[0039] Fig. 7 is a connection view in a state where the four LED units 40 are used in the
illumination fixture 10B (refer to Fig. 1).
As shown in Fig. 7, the LED units 40A, 40B, 40C, 40D are connected to the power source
part 22. The power source part 22 has two lines of DC output.
[0040] One of the lines is an output from the first connector 221, which serves to light
the white LED light sources 311 mounted in the LED units 40A, 40B, 40C, 40D.
The other line is an output from the second connector 222, which serves to light the
warm white LED light sources 312 mounted in the LED units 40A, 40B, 40C, 40D.
[0041] Next, connection of the white LED light sources 311 will be described.
As shown in Fig. 7, a fourth pin of a anode-side connector 411A of the LED unit 40A
is connected to the anode terminal 221A of the first connector 221 of the power source
part 22.
Next, a second pin of a cathode-side connector 412A of the LED unit 40A is connected
to a fourth pin of a anode-side connector 411B of the LED unit 40B.
That is, the anode-side connector 411 and the cathode-side connector 412 adopt the
same connector 41, but use the pins of different numbers (positions).
[0042] Similarly, the LED units 40B, 40C, 40D are connected.
The LED units 40A, 40B, 40C, 40D are connected to one another with use of the harness
34.
Finally, a second pin of a cathode-side connector 412D of the LED unit 40D is connected
to the cathode terminal 221K of the first connector 221 of the power source part 22.
[0043] As shown in Fig. 7, to connect the warm white LED light sources 312, first, a first
pin of the anode-side connector 411A of the LED unit 40A is connected to the anode
terminal 222A of the second connector 222 of the power source part 22.
Next, a third pin of the cathode-side connector 412A of the LED unit 40A is connected
to a first pin of the anode-side connector 411B of the LED unit 40B.
[0044] Similarly, the LED units 40B, 40C, 40D are connected.
The LED units 40A, 40B, 40C, 40D are connected to one another with use of the harness
34.
Finally, a third pin of the cathode-side connector 412D of the LED unit 40D is connected
to the cathode terminal 222K of the second connector 222 of the power source part
22.
[0045] In the LED units 40 and the illumination fixture 10B according to the second embodiment
of the present invention, the same connectors are used as the anode-side connector
411 and the cathode-side connector 412. Since the anode-side connector 411 and the
cathode-side connector 412 use the pins of different numbers, wrong connection at
assembling can be prevented.
As a result, the type of the LED units 40 can be made uniform, thereby reducing manufacturing
and management costs.
By making the color of the anode-side connector 411 different from the color cathode-side
connector 412, wrong connection can be further prevented.
[0046] The LED units 30, 40 and the illumination fixtures 10, 10B of the present invention
are not limited to the above-mentioned embodiments, and may be appropriately modified
and improved.
[Description of Reference Numerals]
[0047]
- 10
- Illumination fixture
- 30
- LED unit (illumination device)
- 31
- LED light source
- 32
- Connector
- 321
- Anode-side connector (first terminal part)
- 322
- Cathode-side connector (second terminal part)
- 33
- Printed circuit substrate (LED substrate)