JP2003036706A - Lighting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting apparatus capable of keeping installed space bright as a night-light using a light source which is reduced in power consumption and not burn out, harmonious and presentable with the interior, emitting blue, green and orange colors of lights as well as white color, without glare. SOLUTION: A plurality of LEDs of different color 14a-d are placed so as to incline the center δ of light emission spreading radially from the lens of LED by about 3-40 deg.. A front diffusion cover 3 shaped approximate hemisphere is interspaced from the LEDs so that the center of light emission occupies the vicinity of the center of curvature, enclosing the LEDs from the front. Ellipsoidal diffusion of the lights emitted by the LEDs at the front diffusion cover looks like ellipsoidal light rings of different color for an observer who observes the light from the outside of the front diffusion cover.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device which is installed on a wall mounting surface of a corridor or stairs in a room and illuminates the installation space to a brightness that does not interfere with human walking at night.

[0002]

2. Description of the Related Art Heretofore, there has been known a light source using a light bulb such as a jujube bulb as a light source, as shown in Registered Utility Model Publication No. 3009070 as a foot light. Further, JP-A-10-208521 describes a light source that generates less heat than a light bulb, saves energy, and uses an LED as a light source that does not burn out.

[0003]

Since the jujube bulb is a light bulb, it is limited to the method of passing a colored film to change the color, harmony with the room, and directivity, and the brightness and saturation are limited. There is. On the other hand, the LED is good as an energy-saving, light source with no out-of-bulb, and blue, green, orange, etc. appearing in addition to white as the light emission color. In the method, it feels dazzling indoors, especially as a night light, and is not suitable for use. Further, even if a plurality of LEDs are arranged side by side, the effect of a lighting fixture with excellent decoration is not obtained if the light bulb is replaced by an LED.

The present invention has been made in view of the above circumstances.
Its purpose is as a light source with low power consumption and no bulb breakage,
In addition to the white color, in addition to white, blue, green, orange, etc. have been added to the interior and harmony with the room. It is to provide a lighting fixture to keep.

[0005]

In order to achieve the above object, a plurality of LEDs having different emission colors are provided side by side, and the emission center radially extending from the LED lens portion is approximately 3-40 with the mounting surface.
A plurality of substantially hemispherical front diffusion covers, which are provided at an inclination to the LED side and have a radius of curvature on the LED side, are combined through a space so as to wrap from the front of the LED, and the emission center that radiates from the LED lens portion is radius of curvature. Provided near the center point. As a result, the light emitted from the plurality of LEDs is diffused into an elliptical shape by the front diffusion cover, so that an observer from the outside of the front diffusion cover emits an oval-shaped ring of different colors. appear. Adjacent elliptical rings can be arranged so as to overlap each other depending on the combination of the shape of the front diffusion cover having a radius of curvature on the LED side, the LED arrangement, the angle, and the distance. As a result, the effect of visualizing the light-emitting bodies that are optically overlapped can be obtained. Further, due to the shape of the front diffusion cover having a radius of curvature on the LED side, the reflected light is diffused except for the oval-shaped ring of the front diffusion cover, and the interior space of the front diffusion cover also seems to be entirely emitting light. Therefore, even if it is used as a night light, there is no glare, and the brightness of the installation space can be maintained as necessary and sufficient.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the luminaire of the present invention will be described below with reference to the drawings of FIGS. The lighting fixture of the present invention is mainly used as a night light, and is used by inserting a plug portion into an outlet provided in a corridor, stairs, or the like. The external appearance is composed of a main body case 1, a case cover 2, a front diffusion cover 3 and a lower surface cover 4 shown in FIGS. 1 and 2, and a plug 5 protruding from the main body case 1 is inserted into an outlet at the time of installation.
The built-in LED illuminator turns on automatically when it gets dark,
Turns off automatically when it becomes bright.

As shown in FIGS. 3 to 7, the main body case 1,
A power supply board 6 and a sensor board 7 are arranged in the case cover 2. The power supply board 6 is composed of a voltage conversion circuit for supplying an appropriate power supply to an LED (light emitting diode) as a light emitting body. LED is DC3.6V
This is an electronic device that emits light at a DC low voltage of about a degree, and its electrical connection is shown in the circuit diagram of FIG. The voltage conversion circuit mainly includes a step-down transformer 8 and a DC conversion element 9. As the step-down transformer 8, either a normal transformer type or a switching transformer type can be selected. The sensor board 7 is an ON / OFF control board using the light sensor 10 and the electronic switching element 11. Turning on / off by the light sensor means detecting the resistance change of the light sensor, usually the CDS cell, as shown in FIG. 8, and turning on the load circuit by the electronic switching element 11, for example, SCR.
/ OFF. As shown in FIG. 5, the light sensor 10 is arranged on the transparent light sensor cover 12 of the lower cover 4 so that the light receiving surface can be seen.

As shown in FIG. 7, the LED substrate 13 is provided with a plurality of LEDs 14a to 14d having different emission colors, and as shown in FIG. 6, the LED light emitting center δ radially spreading from the LED lens portion is mounted on a wall. It is provided at an angle of approximately 3 to 40 ° with respect to the surface. Further, a substantially hemispherical front diffusion cover 3 is assembled through a space so as to wrap the plurality of LEDs inclined at about 3 to 40 ° from the front. FIG. 9 shows details of the light emission of the present invention.
~ It demonstrates in FIG. The front diffusion cover 3 is made of polypropylene, acrylic, opal diffused glass, which has a light diffusion property,
It is made of frosted glass or the like and has a radius of curvature on the LED side to form a substantially semi-spherical shape. Further, a light emission center P radially extending from the LED lens portion is provided in the vicinity of the center point Q of the radius of curvature. Providing in the vicinity means that one LED lens portion P is separated from Q in the vertical direction, as shown in FIGS. 11 and 12, and is ⅔ H of the height H in the front direction.
Those that approach the degree are effective. To be effective means that the light emitted from a plurality of LEDs is diffused into a substantially elliptical shape by the front diffusion cover 3, and for a person who sees from the outside of the front diffusion cover,
This means that different colored elliptical rings appear to be emitting light. Explaining the light diffusion in detail, first, light is emitted radially toward the emission center by the lens effect of the LED. This light is projected on the front diffusion cover 3, and due to its diffusivity, the front diffusion cover forms a substantially elliptical shape, and the wheels of different elliptical colors are emitting light. Adjacent elliptical rings can be arranged so as to overlap each other depending on the combination of the shape of the front diffusion cover having a radius of curvature on the LED side, the LED arrangement, the angle, and the distance. Although it is not possible to stack actual light emitters, according to the present invention, for a person looking from the outside of the front diffusion cover,
The oval-shaped ring of the front diffusion cover appears to be emitting light, and the effect of visualizing the optically overlapping luminous bodies is obtained. Due to the shape of the front diffusion cover having a radius of curvature on the LED side, the reflected light is diffused also in the area other than the elliptical color ring of the front diffusion cover, and the front diffusion cover also supplements light from a portion other than the elliptical color ring. And it seems to be emitting light as a whole. The transmitted light that has passed through the light emission path has no glare even when used as a night light, changes in color, harmony with the room,
It is possible to improve the performance and keep the brightness of the installation space sufficient. The shape of the front diffusion cover 3 having the radius of curvature on the LED side is not limited to one radius of curvature. Rather, by adopting a plurality of radii of curvature, it is possible to provide a highly practical decorative lamp suitable for the season and the place of use by changing the elliptical color ring of the diffusion cover. The shape having the radius of curvature means a circular shape, an elliptical shape, a radial shape, or the like. Moreover, although the uniform shape is described with respect to the thickness of the front diffusion cover 3, it is related to the above-described radius of curvature in terms of whether uniform diffusivity is emphasized or whether diffusiveness rich in changes is used. The effect of the present invention can be further enhanced by changing the thickness. A plurality of front diffusion covers 3 can be prepared depending on the difference in radius of curvature and the difference in thickness, and changes can be incorporated by exchanging them even at the same mounting location.

In FIG. 7, the light emission center δ of the LED is tilted by approximately 3 to 40 ° with respect to the wall mounting surface, so the LED lead is tilted with respect to the LED substrate 13, but the main purpose of the present invention is shown in FIG. Therefore, even if the LED substrate 13 is tilted without bending the LED leads, the same effect is obtained. Also, a plurality of LEDs 14a
7 is described in a substantially straight line shape when the ˜14d are installed side by side, the main aim of the present invention is, as shown in FIG. The configuration is such that the rings of the elliptical shape act as if they are emitting light, and they appear as optically overlapping light emitters.
Within the range that meets this purpose, the position of the ring is changed by changing the vertical position of the LED as shown in FIG.

As shown in the circuit diagram of FIG. 8, the changeover switch 15 shown in FIG.
When replaced by d, 14b and 14c are always connected, 1
4a and 14d are circuits for selecting the one selected by the changeover switch 15. As a result, for example, 14b
It is possible to select a cool color of blue for 14a and a warm color of orange for 14d, based on white for 14c and 14c, and to switch and use a plurality of combinations of LED emission colors according to the season. According to the circuit diagram of the present invention, LEDs having different rated voltages can be used by resistance adjustment or combination of series and parallel. The change-over switch 15 may be of a volume type in which the resistance changes for a while, or a structure in which the switch is connected to the switch when the inclination of the front diffusion cover 3 is changed. (Not shown)

FIG. 13 shows another embodiment of the present invention. L
The end portion of the diffusion tube 16 is inserted into the outer circumference of the lens portion of the ED. As the material of the diffusion tube, polypropylene, acrylic, opal diffused glass, frosted plate diffused glass and the like having light diffusivity are suitable. Light that radiates from the lens portion of the LED is diffused and transmitted by the thickness of the tube 16 and the curvature of the inner circumference, and the tube itself appears to be shining. As a result, although a small projected area is usually felt even when the lens portion of the LED is viewed from the side, an effect of changing the LED lens portion to an enlarged size as if the tube itself is shining is produced. In the effect that keeps the brightness of the installation space to be necessary and sufficient,
More effective.

[0012]

According to the present invention, the LE of a plurality of LEDs is
Radiation that spreads radially from the D lens portion is diffused into an elliptical shape by the front diffusion cover, and acts on the person who sees from the outside of the front diffusion cover as if a ring of different elliptical color is emitting light. To do. Adjacent elliptical rings are LE
Shape of front diffusion cover having radius of curvature on D side, LED
It is possible to arrange them so as to overlap each other by a combination of arrangement, angle, and distance. Due to the shape of the front diffuser cover having a radius of curvature on the LED side, the reflected light can cause the front diffuser cover to appear as if it emits light other than an oval colored ring of different colors. In addition to white, the emission color is blue,
It is possible to provide a lighting fixture that adds harmony with the room, such as green and orange, and that has the advantage of directivity, yet does not cause glare even when used as a night light and that keeps the brightness of the installation space sufficient and sufficient. . The circuit can be selected by the changeover switch, and the LED emission colors can be switched and used in a plurality of combinations depending on the season.

[0013]

[Brief description of drawings]

FIG. 1 is a front perspective view showing a first embodiment of a lighting fixture of the present invention.

FIG. 2 is a rear perspective view of the above.

FIG. 3 is a front view of the above.

4 is a cross-sectional view taken along the line A-B-B-A in FIG.

5 is a sectional view taken along the line A-C-C-A in FIG.

FIG. 6 is an explanatory diagram in which the LED emission center is tilted.

FIG. 7 is an explanatory diagram of an LED substrate.

FIG. 8 is a circuit diagram of the luminaire of the present invention.

FIG. 9 is an explanatory diagram showing an effect of the present invention when an LED is turned on.

FIG. 10 is a front view of the above.

11 is a cross-sectional view taken along the line DD of FIG.

12 is a sectional view taken along line EE of FIG.

13 is a sectional view of the same portion as FIG. 4 showing another embodiment of the present invention.

[Explanation of symbols]

1 body case 2 case cover 3 Front diffusion cover 4 Bottom cover 5 plugs 6 power board 7 sensor board 8 step-down transformer 9 DC converter 10 Light sensor 11 Electronic switching element 12 Light sensor cover 13 LED board 14a LED 14b LED 14c LED 14d LED 15 Changeover switch 16 diffusion tube

Claims (4)

[Claims] 1. A luminaire which is used by inserting a plug protruding from a main body case into an outlet at the time of installation,
A plurality of LEDs having different emission colors are provided side by side, a light emission center that spreads radially from the LED lens portion is provided at an angle of approximately 3 to 40 ° with respect to the mounting surface, and a substantially hemispherical front diffusion cover having a radius of curvature on the LED side A plurality of LED's are combined through a space so as to be wrapped from the front of the LED, and a light emitting angle center radially radiating from the LED lens portion is provided in the vicinity of the center point of the radius of curvature. 2. A luminaire characterized in that light emitted from a plurality of LEDs is projected onto a front diffusion cover to form a ring of a substantially elliptical color different in color and arranged so as to overlap each other. 3. A plurality of LEDs having different emission colors are provided side by side,
A luminaire comprising a selection circuit capable of switching and using a plurality of combinations of LED emission colors. 4. An end portion of a diffusion tube is inserted into the outer circumference of a lens portion of a plurality of LEDs, and light that spreads radially from the LED lens portion is diffused and transmitted by the thickness and curvature and length of the inner circumference of the tube. Lighting equipment that is characterized.