JP2003086006A - Led lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce thickness of LED lighting system for reducing projection downward from a ceiling surface and not deteriorating appearance of the ceiling part when the LED lighting system is directly attached on a ceiling surface of an indoor passage as a lighting system for lightening. SOLUTION: The LED lighting system is provided with plural LEDs 4 and a lighting device 3 controlling LED 4 lighting, the LEDs 4 are arranged in a roughly same plane with the lighting device 3 and around the lighting device 3. Accordingly, the lighting device 3 and the LEDs 4 are in an arrangement condition that the lighting device 3 and LEDs 4 don't overlap in a vertical direction of a direction of light emission from the LEDs 4 and thickness of the LED lighting system is reduced. Accordingly, when the LED lighting system is attached on the ceiling surface of the indoor passage or the like for lightening, dimension of downward projection is reduced even if the same is directly attached on the ceiling surface, appearance of the ceiling part is not deteriorated.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an LED as a light source.
The present invention relates to an LED lighting device.

[0002]

2. Description of the Related Art Conventionally, a lighting device for lighting is provided on a ceiling surface of an indoor passage such as a hotel or an office building. When such an illuminating device is directly attached to the ceiling surface, the illuminating device is arranged so as to project downward from the ceiling surface, and the appearance of the ceiling portion is spoiled.

Therefore, as a lighting device for lighting to be mounted on the ceiling surface of an indoor passage, a downlight of a type in which a hole is formed in the ceiling surface and embedded in the hole is widely used. According to this downlight, there is almost no member protruding from the ceiling surface, or the size of the member protruding downward from the ceiling surface is extremely small, and the appearance of the ceiling portion is not spoiled.

[0004]

However, when the downlight is used, a large hole for embedding the downlight in the ceiling surface must be formed, and the drilling work is troublesome.

An object of the present invention is a lighting device mounted on a ceiling surface of an indoor passage or the like for lighting, which can be directly mounted on the ceiling surface without making a large hole in the ceiling surface, and moreover, faces downward from the ceiling surface. An object of the present invention is to provide an LED lighting device that can reduce the size of protrusions to the outside.

[0006]

L of the invention according to claim 1
The ED lighting device includes a plurality of LEDs and a lighting device that controls lighting of the LEDs, and the LEDs are arranged substantially in the same plane as the lighting device and around the lighting device.

In the present invention and the following inventions,
The lighting device is a rectifier circuit that converts alternating current into direct current,
It means a device including a capacitor or a resistor as a protection element.

Therefore, the lighting device and the LED are
This LED lighting device is thinned because the LED lighting device does not overlap in the vertical direction, which is the emission direction of light from D. For this reason, when this LED lighting device is mounted on a ceiling surface such as an indoor passage and used for lighting, even if it is directly mounted on the ceiling surface, the size protruding downward is small, and the appearance of the ceiling portion is not spoiled. Further, it is only necessary to make a small hole in the ceiling surface through which a power supply line for power feeding or the like is passed, and it is possible to easily perform the drilling processing on the ceiling surface without any trouble.

The LED lighting device according to the invention of claim 2 is
A plurality of LEDs; and a lighting device for controlling the lighting of the LEDs; the lighting device is arranged substantially in the same plane as the LEDs and around the LEDs.

Therefore, the lighting device and the LED are
This LED lighting device is thinned because the LED lighting device does not overlap in the vertical direction, which is the emission direction of light from D. For this reason, when this LED lighting device is mounted on a ceiling surface such as an indoor passage and used for lighting, even if it is directly mounted on the ceiling surface, the size protruding downward is small, and the appearance of the ceiling portion is not spoiled. Further, it is only necessary to make a small hole in the ceiling surface through which a power supply line for power feeding or the like is passed, and it is possible to easily perform the drilling processing on the ceiling surface without any trouble.

According to a third aspect of the present invention, in the LED lighting device according to the first or second aspect, a hook sealing cap having a hook blade is provided as a portion for receiving power from a power source.

Therefore, this LED lighting device can be easily mounted on the ceiling surface by fitting the hook blade into the hook blade receiving hole of the ceiling ceiling body mounted on the ceiling surface. Since this LED lighting device is made thin, the LE mounted on the ceiling surface even in the power feeding structure using the hooking sealing cap.
The dimension of the D illuminator that projects downward from the ceiling surface is reduced, and the aesthetic appearance of the ceiling portion is not impaired.

The invention according to claim 4 is the invention according to claims 1 to 3.
In the LED lighting device according to any one of items 1 to 3,
The light distribution control member is disposed on the side where the light from D is emitted.

Here, in the present invention and the following inventions,
The light distribution control member includes a Fresnel lens, a prism sheet and the like. The Fresnel lens can be used for narrow-angle light distribution for converging light or for wide-angle light distribution for diffusing light by making the lens upside down. Moreover, since the Fresnel lens can reduce the focal length, this Fresnel lens is
The LED lighting device can be arranged close to the ED, and a thin LED lighting device equipped with a Fresnel lens as a light distribution control member can be achieved. The prism sheet can change the direction of light that strikes the prism sheet. In addition, by stacking two or more prism sheets and changing the stacking angle, the number of LEDs when looking up from below can be increased to the number of LEDs actually present or more. It is possible to increase the illuminance just below the lighting device.

Therefore, by using such a light distribution control member, various light distribution control can be performed on the light emitted from the LED.

The invention according to claim 5 is the L according to claim 4.
In the ED lighting device, the LEDs are intermittently arranged in a ring shape, and a narrow-angle light distribution portion and a wide-angle light distribution portion are alternately formed on the light distribution control member along the arrangement direction of the LEDs. The light distribution control member is rotatably switchable between a position where the narrow-angle light distribution unit faces the LED and a position where the wide-angle light distribution unit faces the LED.

Here, the narrow-angle light distribution unit has a function of condensing the light emitted from the LED, and the wide-angle light distribution unit includes the LED.
It has the function of diffusing the light emitted from.

Therefore, the light distribution control member is rotationally switched,
By arranging the narrow-angle light distribution unit so as to face the LED, the light emitted from the LED can be condensed directly downward, and the wide-angle light distribution unit is positioned so as to face the LED. Thereby, the light emitted from the LED can be diffused, and one light distribution control member can be selectively used for condensing and for diffusing.

The present invention as defined in claim 6 is any one of claims 1 to 5.
In the LED lighting device according to any one of items 1 to 3,
D is a large current type LED.

Here, the large-current type LED has an area of a semiconductor chip expanded by introducing a new packaging technology as compared with the conventional type LED. For this reason,
As compared with the conventional type LED, it can pass a large current and emit high-luminance light. In particular,
While the conventional type LED has passed a current of 20 to 30 mA in the range of DC applied voltage of 2 to 4 V, it can pass a large current of 200 to 250 mA in the range of DC applied voltage of 2 to 4 V. In addition, since the conventional type LED emits a small amount of light, the directivity is provided by condensing the emission angle in the range of 5 to 30 °, while the large current type LE is used.
In D, a current of about 10 times that of a conventional type LED can flow, and the amount of light also increases by about 10 times. Therefore, a wide-angle light distribution with an emission angle of about 120 ° can be achieved.

Therefore, by using such a large current type LED, it is possible to secure a sufficient amount of light even when the number of large current type LEDs used is reduced.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first embodiment of the present invention.
Or, it demonstrates based on FIG. Figure 1 LE on the ceiling
2 is an exploded perspective view showing a mounting state of the D lighting device, FIG. 2 is an exploded perspective view, FIG. 3 is a perspective view seen from the back side, and FIG. 4 is a vertical front view illustrating light distribution control by a light distribution control member.

In this LED lighting device, a power feeding portion 2 is attached to a substantially central portion of one surface of a disk-shaped base plate 1, and a lighting device 3 is attached to a substantially central portion of the other surface of the base plate 1. ing. Further, on the other surface of the base plate 1, a large-current type LED which is a plurality of LEDs which are substantially in the same plane as the lighting device 3 and which are intermittently positioned around the lighting device 3 at equal intervals.
4 are arranged. The power supply unit 2 is a portion to which the power supply line 5 is connected and which is supplied with electric power necessary for lighting the large current type LED 4, and the lighting device 3 is provided with the large current type LED 4.
It includes circuits and elements necessary to light up, for example, a rectifying circuit that converts an alternating current into a direct current, a capacitor and a resistor as a protective element, and the like. Further, both the power feeding unit 2 and the lighting device 3 have a cylindrical outer shape, and the diameter of the power feeding unit 2 is formed smaller than the diameter of the lighting device 3.

The large current type LED 4 is a conventional type LED.
In comparison, the area of semiconductor chips has been expanded by the introduction of new packaging technology. Therefore, as compared with the conventional type LED, it is possible to pass a large current and emit high-luminance light. Specifically, the conventional type LED has a DC applied voltage of 20 to 30 in the range of 2 to 4V.
While a current of mA was applied, the applied DC voltage was 2 to
A large current of 200 to 250 mA can be passed in the range of 4V. Further, since the conventional type LED emits a small amount of light, the directivity is provided by condensing the radiation angle within the range of 5 to 30 °, whereas the large current type LED 4 has a directivity. The current can flow about 10 times, and the amount of light also increases about 10 times.
Wide-angle light distribution of 20 ° is possible.

Power supply unit 2, lighting device 3, large current type LED 4
The base plate 1 to which is attached is screwed to the ceiling surface 7 by attaching screws 6 as shown in FIG.

A screw portion 8 is formed on the outer peripheral portion of the base plate 1, and a light distribution control member 9 arranged on the radiation side of the light from the large current type LED 4 is fitted and attached to the screw portion 8. ing. The light distribution control member 9 includes a lighting device 3 and a large current type L.
It is formed in a cap shape that covers the ED 4, and in a portion of the light distribution control member 9 facing the large current type LED 4,
Narrow-angle light distribution sections 9a and wide-angle light distribution sections 9b are formed alternately in the same number as the large-current type LEDs 4 along the arrangement direction of the large-current type LEDs 4. The narrow-angle light distribution unit 9a is a large-current LE
The wide-angle light distribution unit 9b has a function of concentrating the light emitted from D4 toward the bottom, and the wide-angle light distribution unit 9b has a function of diffusing the light emitted from the large-current type LED 4, and the narrow-angle light distribution unit 9a.
And the wide-angle light distribution unit 9b are both upside down using Fresnel lenses.

The light distribution control member 9 can be rotated in the forward and reverse directions while maintaining the fitting state with the screw portion 8.
By this rotation operation, the light distribution control member 9 is moved to the narrow-angle light distribution portion 9a.
And the wide-angle light distribution section 9b
Can be switched to a position facing the large current type LED 4.

Further, this LED lighting device is directly mounted on the ceiling surface 7 as shown in FIG. 1, and the insertion hole 1 into which the power feeding unit 2 is inserted is mounted on the ceiling surface 7.
0 is formed. Power feeding unit 2 inserted in insertion hole 10
A power supply line 5 for power supply is connected to the.

In such a structure, the LED lighting device is provided with a plurality of large current type LEDs 4 on the same surface as the lighting device 3 and around the lighting device 3, and the lighting device 3 and the large current type LED 4 are arranged in the vertical direction. It will be in an arrangement state that does not overlap with
It has been made thinner. Therefore, when this LED lighting device is attached to the ceiling surface 7 of an indoor passage or the like and used for lighting, even if it is directly attached to the ceiling surface 7, the size protruding downward is small, and the appearance of the ceiling portion may be impaired. Absent.

Further, it suffices to form a small-diameter insertion hole 10 into which the power feeding portion 2 is inserted in the ceiling surface 7, and it is possible to easily perform the drilling processing on the ceiling surface 7 without any trouble. Moreover, the insertion hole 10 is a portion which is covered by the LED lighting device mounted on the ceiling surface 7 and cannot be seen from the lower side, and thus finishing work for improving the aesthetic appearance is unnecessary.

Further, this LED lighting device is provided with a light distribution control member 9 having a narrow-angle light distribution portion 9a and a wide-angle light distribution portion 9b, and the light distribution control member 9 can be rotated and switched. As a result, as shown in FIG. 4 (a), the narrow-angle light distribution section 9a is opposed to the large-current type LED 4 to perform downward concentrated light illumination, and as shown in FIG. It is possible to switch to a state in which the portion 9b is opposed to the large current type LED 4 and diffused illumination is performed. As a result, it is possible to perform optimal illumination as needed. Moreover, the switching operation can be performed by a simple operation of turning the light distribution control member 9 at a slight angle.

Next, a second embodiment of the present invention will be described with reference to FIG.
It will be described based on. The same parts as those described in FIGS. 1 to 4 are designated by the same reference numerals, and the description thereof will be omitted (the same applies to the following embodiments). LE of the present embodiment
The basic structure of the D lighting device is the same as that of the LED lighting device of the first embodiment, except that the lighting device 3 and a plurality of large current type LEDs 4 mounted on the other surface of the base plate 1 are different. And the arrangement state. In the present embodiment, the large-current type LED 4 is arranged near the center, and the lighting device 3 is arranged around it. Correspondingly, the positions of the narrow-angle light distribution portion 9a and the wide-angle light distribution portion (not shown) formed on the light distribution control member 9 and facing the large-current type LED 4 are also located near the center. has been changed.

With such a structure, in the LED lighting device of the present embodiment, the lighting device 3 includes a plurality of large current type L lamps.
The lighting device 3 and the large current LED 4 are arranged in the same plane as the ED 4 and around the large current LED 4, and the lighting device 3 and the large current LED 4 do not overlap each other in the vertical direction. For this reason, this LED lighting device is installed on a ceiling surface 7 such as an indoor passage.
When it is mounted on the ceiling surface 7 and used for lighting, the size protruding downward is small even if it is directly mounted on the ceiling surface 7, and the appearance of the ceiling portion is not spoiled.

Further, it suffices to form a small-diameter insertion hole 10 into which the power feeding portion 2 is inserted in the ceiling surface 7, and it is possible to easily perform the drilling processing on the ceiling surface 7 without any trouble. Moreover, the insertion hole 10 is a portion which is covered by the LED lighting device mounted on the ceiling surface 7 and cannot be seen from the lower side, and thus finishing work for improving the aesthetic appearance is unnecessary.

Next, a third embodiment of the present invention will be described with reference to FIG.
It will be described based on. In this embodiment, a hook sealing cap 12 having hook blades 11 is provided on one surface of the base plate 1 as a portion for receiving power from a power source. On the other surface of the base plate 1, as in the first or second embodiment, a lighting device and a large-current type LED (neither shown) are attached.

With such a configuration, in the LED lighting device of the present embodiment, the hooking blade 11 is provided in the hooking blade receiving hole (not shown) of the hooking sealing body (not shown) attached to the ceiling surface 7. The fitting to the ceiling surface 7 is performed. And this LED lighting device is the first
Alternatively, since the thinning is achieved as in the second embodiment, even in the power feeding structure using the hooking sealing cap 12, the LED lighting device mounted on the ceiling surface 7 faces downward from the ceiling surface 7. The protruding size is reduced, and the LED lighting device can be directly attached to the ceiling surface 7 without impairing the appearance of the ceiling portion.

Next, a fourth embodiment of the present invention will be described with reference to FIG.
It will be described based on. In this embodiment, two prism sheets 13 are used as a light distribution control member. Two prism sheets 13 are large current type L
The prism sheet 13 is arranged on the radiation side of the light from the ED 4, one prism sheet 13 is fixedly attached, and the other prism sheet 13 is attached so that its rotation is adjustable.

In such a structure, the number of visible large current type LEDs 4 is actually present by rotationally adjusting the freely adjustable prism sheet 13 and adjusting the overlapping angle of the two prism sheets 13. Large current type LED
It is possible to increase the number to 4 or more and adjust the illuminance.

FIG. 7A shows a state in which the prism sheet 13 is not attached, and the actual number of large current type LEDs 4 are visible. FIG. 7B shows a state in which the two prism sheets 13 are arranged on the radiation side of the light from the large current type LED 4 and the rotation angles of the two prism sheets 13 are set to a certain angle. The number of high-current type LEDs 4 is doubled. FIG. 7C shows a state in which the rotation angles of the two prism sheets 13 are changed, the number of large current type LEDs 4 is seen to be four times, and the illuminance of the portion directly below the LED lighting device is shown in FIG.
It is up compared with (b).

[0040]

According to the LED lighting device of the first aspect of the invention, since the plurality of LEDs are arranged substantially in the same plane as the lighting device and arranged around the lighting device, the lighting device and the LED
And LED are arranged so that they do not overlap each other in the vertical direction, which is the direction of emission of light from the LEDs, and this LED lighting device is made thin, so this LED lighting device is mounted on the ceiling surface of an indoor passage or the like and used for lighting. In this case, even if it is directly attached to the ceiling surface, the size protruding downward will be small, and the appearance of the ceiling part will not be impaired.
All you have to do is to make a small hole through which the power supply line for power feeding etc. passes, and you can easily make a hole in the ceiling surface without trouble.

According to the LED lighting device of the second aspect of the present invention, since the lighting device is arranged substantially in the same plane as the plurality of LEDs and arranged around the LEDs, the lighting device and the LEDs are separated from each other. This LED lighting device is made thin because it does not overlap in the vertical direction, which is the direction of light emission, and therefore, when this LED lighting device is mounted on a ceiling surface such as an indoor passage and used for lighting, the ceiling surface Even if it is directly attached to the, the size that protrudes downward becomes small, it does not spoil the aesthetics of the ceiling part, and only needs to make a small hole on the ceiling surface for passing the power supply line for power supply,
Drilling on the ceiling surface can be easily done without much effort.

According to the third aspect of the present invention, in the LED lighting device according to the first or second aspect, a hook ceiling cap having a hook blade is provided as a portion for receiving power from the power source. The device can be easily installed on the ceiling surface by fitting the hook blade into the hook blade receiving hole of the hook sealing body attached to the ceiling surface. L attached to the ceiling surface even with a structure
Since the size of the ED lighting device that projects downward from the ceiling surface is small, the appearance of the ceiling portion is not impaired.

According to the invention described in claim 4, in the LED lighting device according to any one of claims 1 to 3, L
Since the light distribution control member arranged on the emission side of the light from the ED is provided, various light distribution control can be performed on the light emitted from the LED by using such a light distribution control member. Therefore, it is possible to increase the illuminance of the portion directly below the LED lighting device and to widen the illumination range of the LED lighting device.

According to a fifth aspect of the invention, in the LED lighting device according to the fourth aspect, the LEDs are intermittently arranged in a ring shape, and the light distribution control member is arranged along the arrangement direction of the LEDs. Narrow-angle light distribution portions and wide-angle light distribution portions are alternately formed, and in the light distribution control member, the narrow-angle light distribution portions are the LEs.
Since the wide-angle light distribution unit is rotatably switchable between the position facing D and the position facing the LED, the narrow-angle light distribution unit faces the LED by rotating and switching the light distribution control member. The light radiated from the LED can be condensed directly downward by arranging it so that the light radiated from the LED is diffused by arranging the wide-angle light distribution portion so as to face the LED. Thus, one light distribution control member can be selectively used for light collection and diffusion.

According to the invention described in claim 6, in the LED lighting device according to any one of claims 1 to 5, since the LED is a large current type LED, such a large current type LED is used. Large current type LE to use
Even when the number of D is reduced, it is possible to sufficiently secure the necessary light amount.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing a mounting state of an LED lighting device according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing an LED lighting device.

FIG. 3 is a perspective view of the LED lighting device as viewed from the back side.

FIG. 4 is a vertical cross-sectional front view illustrating light distribution control by a light distribution control member, FIG. 4A is a light distribution state by a narrow-angle light distribution unit,
(B) is a light distribution state by the wide-angle light distribution unit.

FIG. 5 is a vertical cross-sectional front view showing a mounting state of the LED lighting device according to the second embodiment of the present invention.

FIG. 6 is a perspective view of an LED lighting device according to a third embodiment of the present invention as viewed from the back surface side.

FIG. 7 is a bottom view showing how LEDs are viewed by switching the prism sheet in the LED lighting device according to the fourth embodiment of the present invention.

[Explanation of symbols]

3: Lighting device 4: LED, high current type LED 9: Light distribution control member 9a: Narrow angle light distribution unit 9b: Wide-angle light distribution unit 11: Hooking blade 12: Hook ceiling cap

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F21V 23/02 F21Y 101: 02 // F21Y 101: 02 F21S 1/02 GB (72) Inventor Mitsuru Moriyama Higashi Shinagawa-ku, Tokyo 4-3-1 Higashi-Shinagawa, Toshiba Toshiba Tech (72) Inventor Kozo Ogawa 4-3-1, Higashi-Shinagawa, Shinagawa-ku, Tokyo F-Term (reference) 3K014 AA01 DA05 EA04

Claims (6)

[Claims] 1. An LED provided with a plurality of LEDs; and a lighting device for controlling lighting of the LED, wherein the LEDs are arranged substantially in the same plane as the lighting device and around the lighting device. Lighting equipment. 2. A plurality of LEDs; and a lighting device for controlling lighting of the LEDs, the lighting device being in substantially the same plane as the LEDs and having the L
LED lighting device arranged around the ED. 3. The LED lighting device according to claim 1, further comprising a hook sealing cap having a hook blade as a portion for receiving power from a power source. 4. The LED lighting device according to claim 1, further comprising a light distribution control member arranged on a side of emitting light from the LED. 5. The LEDs are intermittently arranged in a ring shape, and a narrow-angle light distribution portion and a wide-angle light distribution portion are alternately formed on the light distribution control member along an arrangement direction of the LEDs. The LED lighting device according to claim 4, wherein the light distribution control member is provided so as to be rotatable and switchable between a position where the narrow-angle light distribution unit faces the LED and a position where the wide-angle light distribution unit faces the LED. . 6. The LED lighting device according to claim 1, wherein the LED is a large current type LED.