JP4565307B2 - LED lighting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an LED lighting device using LEDs as light sources.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a lighting device for lighting is provided on the ceiling surface of an indoor passage such as a hotel or office building. When such an illuminating device is directly attached to the ceiling surface, the illuminating device is arranged to protrude downward from the ceiling surface, which impairs the beauty of the ceiling portion.
[0003]
Therefore, as a lighting device for lighting that is attached to a ceiling surface or the like 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 are almost no members protruding from the ceiling surface, or the dimensions of the members protruding downward from the ceiling surface are very small, so that the appearance of the ceiling portion is not impaired.
[0004]
[Problems to be solved by the invention]
However, when a downlight is used, it is necessary to form a large hole for embedding the downlight in the ceiling surface, and the drilling work is troublesome.
[0005]
An object of the present invention is a lighting device that is attached to a ceiling surface of an indoor passage or the like for light removal, and can be directly attached to the ceiling surface without making a large hole in the ceiling surface, and protrudes downward from the ceiling surface. It is providing the LED illuminating device which can make a dimension small.
[0006]
[Means for Solving the Problems]
The LED lighting device according to claim 1 is a plurality of LEDs intermittently arranged in a ring shape ; a lighting device that controls lighting of the LEDs ; and a light emission side of the LEDs, A narrow-angle light distribution part and a wide-angle light distribution part alternately formed along the arrangement direction of the LEDs, the position where the narrow-angle light distribution part faces the LED and the wide-angle light distribution part on the LED And a light distribution control member provided so as to be able to rotate and switch to an opposing position .
[0007]
Here, in the present invention and the following invention, the lighting device means a device including a rectifier circuit that converts an alternating current into a direct current, a capacitor, a resistor, and the like as protective elements. Further, the narrow-angle light distribution unit has a function of condensing light emitted from the LED, and the wide-angle light distribution unit has a function of diffusing light emitted from the LED. The light distribution control member includes a Fresnel lens. The Fresnel lens can be used for narrow-angle light distribution for condensing light or wide-angle light distribution for diffusing light by turning the lens upside down. In addition, since the focal length of the Fresnel lens can be reduced, the Fresnel lens can be disposed close to the LED, and the LED lighting device having the Fresnel lens attached as a light distribution control member can be made thinner.
Therefore, by rotating the light distribution control member and positioning 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 By positioning the light distribution portion so as to face the LED, the light emitted from the LED can be diffused, and one light distribution control member can be selectively used for condensing and diffusing.
[0009]
The LED lighting device according to a second aspect of the present invention is the LED lighting device according to the first aspect, wherein the LEDs are arranged in the same plane as the lighting device and around the lighting device. The LED lighting device according to a third aspect of the present invention is the LED lighting device according to the first aspect, wherein the lighting device is disposed substantially in the same plane as the LED and around the LED.
[0010]
Therefore, the lighting device and the LED are arranged so as not to overlap each other in the vertical direction that is the radiation direction of the light from the LED, and the LED lighting device is thinned. For this reason, when this LED lighting device is mounted on a ceiling surface such as an indoor passage and used for light removal, even if it is directly mounted on the ceiling surface, the dimension protruding downward is reduced, and the aesthetic appearance of the ceiling portion is not impaired. In addition, it is only necessary to make a small hole through the ceiling surface to pass a power line for power supply, and the hole can be easily drilled in the ceiling surface without any trouble.
[0019]
According to a fourth aspect of the present invention, in the LED illumination device according to any one of the first to third aspects, the LED is a large current type LED.
[0020]
Here, the high-current type LED is obtained by expanding the area of the semiconductor chip by introducing a new packaging technology as compared with the conventional type LED. For this reason, compared with a conventional type LED, a large current can be passed, and high-luminance light can be emitted. Specifically, the conventional type LED passed a current of 20 to 30 mA with a DC applied voltage in the range of 2 to 4 V, whereas a large current of 200 to 250 mA with a DC applied voltage of 2 to 4 V was applied. It can flow. In addition, since the amount of light emitted from the conventional type LED is small, the radiation angle is condensed in the range of 5 to 30 °, and the directivity is given to the large current type LED. About 10 times as much current and the amount of light increases about 10 times, so that a wide-angle light distribution with a radiation angle of about 120 ° can be achieved.
[0021]
Therefore, by using such a large current type LED, even when the number of large current type LEDs to be used is reduced, a sufficient amount of light can be secured.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment will be described with reference to FIGS. FIG. 1 is a longitudinal front view showing an LED lighting device mounted on a ceiling surface, FIG. 2 is an exploded perspective view, FIG. 3 is a perspective view seen from the back side, and FIG. 4 explains light distribution control by a light distribution control member. FIG.
[0023]
In this LED lighting device, a power feeding unit 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. Further, on the other surface of the base plate 1, a large current type LED 4, which is a plurality of LEDs that are substantially in the same plane as the lighting device 3 and are intermittently positioned around the lighting device 3 at equal intervals, is disposed. ing. The power supply unit 2 is a portion to which power necessary for turning on the large current LED 4 is supplied by connecting the power line 5, and the lighting device 3 has a circuit or a circuit necessary for lighting the large current LED 4. An element, for example, a rectifier circuit that converts an alternating current into a direct current, a capacitor or a resistor as a protective element, and the like are included.
In addition, both of the power supply unit 2 and the lighting device 3 have a cylindrical outer shape, and the diameter of the power supply unit 2 is smaller than the diameter of the lighting device 3.
[0024]
The large current type LED 4 has a larger semiconductor chip area than the conventional type LED due to the introduction of a new packaging technology. For this reason, compared with a conventional type LED, a large current can be passed, and high-luminance light can be emitted. Specifically, the conventional type LED passed a current of 20 to 30 mA with a DC applied voltage in the range of 2 to 4 V, whereas a large current of 200 to 250 mA with a DC applied voltage of 2 to 4 V was applied. It can flow. In addition, since the conventional type LED emits less light, the radiation angle is condensed in the range of 5 to 30 ° to provide directivity, whereas the large current type LED 4 has a directivity compared to the conventional type LED. About 10 times as much current and the amount of light increases about 10 times, so that a wide-angle light distribution with a radiation angle of about 120 ° can be achieved.
[0025]
The base plate 1 to which the power feeding unit 2, the lighting device 3, and the large current type LED 4 are attached is screwed to the ceiling surface 7 with attachment screws 6 as shown in FIG.
[0026]
A screw portion 8 is formed on the outer peripheral portion of the base plate 1, and a light distribution control member 9 disposed on the light emission side from the large current type LED 4 is fitted and attached to the screw portion 8. The light distribution control member 9 is formed in a cap shape that covers the lighting device 3 and the large current type LED 4, and the portion of the light distribution control member 9 facing the large current type LED 4 is arranged with the arrangement of the large current type LEDs 4. Narrow-angle light distribution portions 9a and wide-angle light distribution portions 9b are alternately formed in the same number as the number of large current LEDs 4 along the direction. The narrow-angle light distribution unit 9a has a function of condensing the light emitted from the large current type LED 4 so as to be directly below, and the wide angle light distribution unit 9b has a function of diffusing the light emitted from the large current type LED 4. The narrow-angle light distribution unit 9a and the wide-angle light distribution unit 9b are both made upside down using Fresnel lenses.
[0027]
Further, 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, and the narrow angle light distribution portion 9 a causes the light distribution control member 9 to be rotated by this turning operation. The position can be switched between a position facing the large current LED 4 and a position where the wide-angle light distribution unit 9 b faces the large current LED 4.
[0028]
Further, the LED lighting device is directly attached to the ceiling surface 7 as shown in FIG. 1, and an insertion hole 10 into which the power feeding unit 2 is inserted is formed in the ceiling surface 7 on which the LED lighting device is attached. A power supply power line 5 is connected to the power feeding unit 2 inserted into the insertion hole 10.
[0029]
In such a configuration, the LED lighting device is provided with a plurality of large current LEDs 4 on the same surface as the lighting device 3 and around the same, and the lighting device 3 and the large current LEDs 4 are not overlapped in the vertical direction. It is in an arrangement state and is thinned. For this reason, when this LED lighting device is attached to the ceiling surface 7 such as an indoor passage and used for light removal, the size of the downward projecting portion is reduced even if it is directly attached to the ceiling surface 7, and the appearance of the ceiling portion may be impaired. Absent.
[0030]
Moreover, it is only necessary to make a small-diameter insertion hole 10 for inserting the power feeding unit 2 in the ceiling surface 7, and the hole making process to the ceiling surface 7 can be easily performed. In addition, the insertion hole 10 is a portion that is covered by the LED lighting device attached to the ceiling surface 7 and cannot be seen from the lower side, so that a finishing process for improving the aesthetic appearance is unnecessary.
[0031]
In addition, the LED illumination device is provided with a light distribution control member 9 including a narrow-angle light distribution unit 9a and a wide-angle light distribution unit 9b. As shown in FIG. 4 (a), the narrow-angle light distribution unit 9a is opposed to the high-current LED 4 to perform downward focused illumination, and as shown in FIG. 4 (b), the wide-angle light distribution unit 9b is It is possible to switch to a state in which diffuse illumination is performed facing the large current type LED 4. Thereby, the optimal illumination according to need can be performed. Moreover, the switching operation can be performed by a simple operation of turning the light distribution control member 9 by a slight angle.
[0032]
Next, a description will be given of a second embodiment in FIG. The same parts as those described in FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof is also omitted (the same applies to the following embodiments). The basic structure of the LED lighting device according to the present embodiment is the same as that of the LED lighting device according to the first embodiment, and a different part is a plurality of lighting devices 3 attached to the other surface of the base plate 1. This is an arrangement state with the large current type LED 4. In the present embodiment, the large current type LED 4 is disposed at a position closer to the center, and the lighting device 3 is disposed around the large current type LED 4. Correspondingly, the positions of the narrow-angle light distribution part 9a and the wide-angle light distribution part (not shown) formed on the light distribution control member 9 and facing the large current type LED 4 are also located closer to the center. has been edited.
[0033]
In such a configuration, in the LED lighting device according to the present embodiment, the lighting device 3 is disposed in the same plane as the plurality of large current LEDs 4 and around the large current LEDs 4. The current type LED 4 is arranged so as not to overlap in the vertical direction, and is thinned. For this reason, when this LED lighting device is attached to the ceiling surface 7 such as an indoor passage and used for light removal, the size of the downward projecting portion is reduced even if it is directly attached to the ceiling surface 7, and the appearance of the ceiling portion may be impaired. Absent.
[0034]
Moreover, it is only necessary to make a small-diameter insertion hole 10 for inserting the power feeding unit 2 in the ceiling surface 7, and the hole making process to the ceiling surface 7 can be easily performed. In addition, the insertion hole 10 is a portion that is covered by the LED lighting device attached to the ceiling surface 7 and cannot be seen from the lower side, so that a finishing process for improving the aesthetic appearance is unnecessary.
[0035]
The following will describe a third embodiment in FIG. In the present embodiment, a hooking sealing cap 12 including a hooking blade 11 is provided on one surface side of the base plate 1 as a portion that receives power from a power source. As in the first or second embodiment, a lighting device and a large current type LED (both not shown) are attached to the other surface of the base plate 1.
[0036]
In such a configuration, the LED lighting device of the present embodiment causes the hooking blade 11 to be fitted into the hooking blade receiving hole (not shown) of the hooking sealing body (not shown) attached to the ceiling surface 7. Thus, the attachment to the ceiling surface 7 is performed. Since the LED lighting device is thinned as in the first or second embodiment, the LED mounted on the ceiling surface 7 even with the power feeding structure using the hooking sealing cap 12. The dimension which protrudes downward from the ceiling surface 7 of an illuminating device becomes small, and an LED illuminating device can be directly attached to the ceiling surface 7 without impairing the beauty | look of a ceiling part.
[0037]
Next, a description will be given of a fourth embodiment in FIG. In the present embodiment, two prism sheets 13 are used as a light distribution control member. The two prism sheets 13 are arranged on the radiation side of the light from the large current type LED 4 in a superposed state, one prism sheet 13 is fixedly mounted, and the other prism sheet 13 is freely adjustable. Installed on.
[0038]
In such a configuration, the number of visible high-current LEDs 4 actually exists by adjusting the rotation of the prism sheet 13 that can be rotated and adjusting the overlapping angle of the two prism sheets 13. The number of LEDs 4 can be increased to the number of LEDs 4 or more, and the illuminance can be adjusted.
[0039]
FIG. 7A shows a state in which the prism sheet 13 is not attached, and an actual number of large current LEDs 4 can be seen. FIG. 7B shows a state in which two prism sheets 13 are arranged on the radiation side of the light from the large-current LED 4 and the rotation angle of the two prism sheets 13 is set to a certain angle. The number of high-current 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 LEDs 4 appears to be four times, and the illuminance directly below the LED illumination device is as shown in FIG. ) Is up compared to.
[0040]
【The invention's effect】
According to the LED lighting device of the first aspect of the invention, by using the light distribution control member, it is possible to perform various light distribution controls on the light emitted from the LED, and in the portion directly below the LED lighting device. Illuminance can be increased and the illumination range by the LED illumination device can be expanded. In other words, by rotating the light distribution control member and positioning 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 distribution is also possible. By positioning the light portion so as to face the LED, the light emitted from the LED can be diffused, and one light distribution control member can be selectively used for condensing and diffusing.
Further, according to the LED lighting device of the second and third aspects of the invention, the lighting device and the LED are arranged so as not to overlap each other in the vertical direction that is the radiation direction of the light from the LED, and the LED lighting device is thinned. Therefore, when this LED lighting device is mounted on a ceiling surface of an indoor passage or the like and used for lighting, the dimension protruding downward is reduced even if it is directly mounted on the ceiling surface, and the appearance of the ceiling portion is not impaired. In addition, it is only necessary to make a small hole through the power supply line for power supply on the ceiling surface, and it is possible to easily make a hole in the ceiling surface without any trouble.
[0045]
According to a fourth aspect of the present invention, in the LED lighting device according to any one of the first to third aspects, the LED is a large current type LED. Even when the number of large current LEDs to be reduced is reduced, a sufficient amount of light can be secured.
[Brief description of the drawings]
FIG 1 is a longitudinal front view showing a mounting state of the LED lighting device of the first embodiment.
FIG. 2 is an exploded perspective view showing an LED lighting device.
FIG. 3 is a perspective view of the LED lighting device as seen from the back side.
4A and 4B are longitudinal front views for explaining light distribution control by a light distribution control member. FIG. 4A is a light distribution state by a narrow-angle light distribution unit, and FIG. 4B is a light distribution state by a wide-angle light distribution unit.
FIG. 5 is a longitudinal sectional front view showing a mounting state of the LED lighting device of the second embodiment.
6 is a perspective view of the LED lighting device of the third embodiment from the back side.
FIG. 7 is a bottom view showing how an LED is seen by switching prism sheets in the LED lighting device of the fourth embodiment.
[Explanation of symbols]
3: Lighting device 4: LED, high-current LED
9: Light distribution control member 9a: Narrow angle light distribution unit 9b: Wide angle light distribution unit 11: Hook blade 12: Hook sealing cap

Claims (4)

A plurality of LEDs arranged intermittently in a ring shape ;
A lighting device for controlling lighting of the LED;
The LED has a narrow-angle light distribution part and a wide-angle light distribution part that are arranged on the light emission side of the LED and are alternately formed along the arrangement direction of the LEDs, and the narrow-angle light distribution part is attached to the LED. A light distribution control member provided so as to be able to rotate and switch between a facing position and a position where the wide-angle light distribution section faces the LED;
LED lighting device comprises a. The LED lighting device according to claim 1, wherein the LED is disposed in a substantially same plane as the lighting device and around the lighting device. Before SL lighting device, the LED and is disposed around the LED be substantially the same plane, LED lighting apparatus according to claim 1. The LED illumination device according to any one of claims 1 to 3 , wherein the LED is a large current type LED.

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