TW201812207A - Illumination device - Google Patents

Abstract

The present invention provides an illumination device with low cost and high color rendering using an LED as a light source. The lighting device of the present invention is characterized by comprising a light source substrate having an LED (1e) that emits red light, an LED (1f) that emits blue light, an LED (1c) that emits light of an incandescent lamp, and an LED.

Description

   Lighting device   

The present invention relates to a lighting device using LED (Light Emitting Diode) as a light source.

As a light source that replaces an incandescent lamp or a fluorescent lamp with a conventional light source, a lighting device using a white LED (for example, a ceiling lamp or an LED bulb) is becoming increasingly popular. Compared with conventional light sources, white LEDs have lower power consumption and longer life. On the other hand, the general white LED has insufficient radiation intensity at a wavelength of 470 nm to 500 nm and radiation at a wavelength above 610 nm in characteristics, and lacks color rendering of the characteristics of a light source that affects the color seen by an object.

Therefore, in a lighting device using an LED as a light source, the degree of color rendering of an object is low, and it is necessary to improve color rendering. As a conventional technique for this purpose, for example, a technique described in Patent Document 1 is known. Patent Document 1 discloses a case where three or more types of bulb colors and daylight colors are used as LEDs of different wavelengths to improve color rendering.

    [Prior technical literature]         [Patent Literature]    

[Patent Document 1] Japanese Patent Laid-Open No. 2013-058394

In the technology described in Patent Document 1, in order to achieve high color rendering, mounting of three or more types of bulb colors and daylight color LEDs having different wavelengths may cause a cost increase. The present invention aims to provide a lighting device with low cost and high color rendering.

The present invention is characterized by having a light source substrate including a red LED that emits red light, a blue LED that emits blue light, a bulb-color LED that emits light as a bulb, and a light source substrate that emits daylight-color LEDs that emit light. .

Furthermore, the above-mentioned LEDs of different wavelengths refer to those who emit red light with a peak wavelength of 610nm to 750nm, those who emit blue light with a peak wavelength of 470nm to 500nm, and those who emit light with a bulb wavelength of 550nm to 650nm. It is characterized by sunlight with a peak wavelength of 430 ~ 460nm.

Furthermore, the ratio of the number of LEDs emitting red light and the LEDs emitting blue light is 1: 1, and the LEDs emitting red light and the LEDs emitting blue light are arranged as a mutual arrangement. The arrangement shape is characterized by a ring shape.

In the present invention, a person having a plurality of LEDs having different wavelengths described above can provide a lighting device with low cost and high color rendering.

In addition to being mounted on general LED lighting devices, LEDs emitting light in the color of bulbs, and LEDs emitting light in the color of daylight, additional LEDs emitting red light with a peak wavelength of 610nm to 750nm, and LEDs emitting light with a peak wavelength of 470nm to 500nm LEDs with blue light make up the part of the light emission spectrum with a weak wavelength, and can improve the color rendering.

Furthermore, the ratio between the number of LEDs emitting red light and the number of LEDs emitting blue light is 1: 1, and those who arrange them alternately, the colors are mixed, and the light color irradiated through the transparent cover is not red. The light or blue light has the same color as the light emitted by the illuminating device that emits only bulb-colored light and daylight-colored light.

1‧‧‧ light source substrate

1a‧‧‧ protrusion on the outer periphery of the light source substrate

1b‧‧‧Front part of light source substrate

1c‧‧‧ Cutting part of light source substrate

1d‧‧‧bulb color LED

1e‧‧‧Daylight LED

1f‧‧‧Red LED

1g‧‧‧Blue LED

2‧‧‧LED cover

2a‧‧‧LED Cover Side

2b‧‧‧LED Cover Front

2c‧‧‧Protrusions on the side of the LED cover

2d‧‧‧feather-like protrusions

2e‧‧‧lens

3‧‧‧ transparent cover

3a‧‧‧ front of transparent cover

4‧‧‧ heat sink

4a‧‧‧ Front of heat sink

4b‧‧‧ Front part around the heat sink

4c‧‧‧ heat sink slant face

4d‧‧‧ wall-shaped protrusion of the heat sink

4e‧‧‧Screw holes on the front of the heat sink

4f‧‧‧Screw holes on the front part around the heat sink

4g‧‧‧bearing

4h‧‧‧Bearing hole

5‧‧‧Power supply board

6‧‧‧ Insulation board

6a‧‧‧ Front of insulation board

6b‧‧‧ Insulating plate cylinder

6c‧‧‧ slanted surface of insulation board

7‧‧‧ back plate

7a‧‧‧Front of back panel

7b‧‧‧ wall-shaped protrusion of the back plate

7c‧‧‧fate

8‧‧‧ adapter

9a‧‧‧ Valley of luminescence spectrum

9b‧‧‧ Inclined part of emission spectrum

FIG. 1 is a development view of a structure of a lighting device according to an embodiment of the present invention.

Fig. 2 is a perspective view of a light source substrate.

Figure 3 is a perspective view of a heat sink.

FIG. 4 is a light emission spectrum chart of a case where only a bulb color LED and a daylight color LED are irradiated.

The entire structure of the lighting device according to the present invention is shown in FIG. 1. FIG. 1 is a development view of a structure of a lighting device according to an embodiment of the present invention.

As shown in FIG. 1, a lighting device 100 according to an embodiment of the present invention includes a light source substrate 1 having a light emitting portion of an LED, and an LED cover having a lens 2 e for diffusing light emitted from the LED in another direction. 2, and a light-transmitting cover 3 for diffusing light, a heat-dissipating plate 4 for dissipating heat generated from the light source substrate 1, a power-supply substrate 5 having a control device, and an insulating plate 6 for accommodating the power-supply substrate 5, and It is configured to surround the power supply substrate 5 and the back plate 7 of the insulating plate 6.

    (Configuration)    

The light source substrate 1 is bolted as the bottom surface portion of the light source substrate 1 is in close contact with the front surface portion 4 a of the heat sink 4. The hole at the center of the back plate 7 and the cylindrical portion at the center of the insulation plate 6 are aligned with each other, and the insulation plate 6 is mounted on the back plate 7. The front face of the insulating plate 6 is used to check the slightly arc shape of the power supply substrate 5 and the slightly arc shape of the insulation plate 6, and the bottom surface side of the power substrate 5 is used to face the front face 6a of the insulation plate 6. , The power supply substrate 5 is bolted to the back plate 7 by sandwiching the insulating plate 6.

The bottom plate 7 surrounding the back plate 7 and the front surface side of the edge 7 c of the back plate 7 are anastomosed with each other, and are bolted to the heat plate 4. The LED cover 2 is a cover that covers the light source substrate 1 and is bolted to the front side of the heat sink 4. Furthermore, the light source substrate 1 and the LED cover 2 are covered, and the translucent cover 3 is mounted on the holder 4e.

    (Light source substrate)    

FIG. 2 is a perspective view of the light source substrate 1. The light source substrate 1 is formed in a substantially circular shape as shown in FIG. 2. The outer peripheral portion of the light source substrate 1 is a protrusion 1 a having a connector connection portion facing the outer peripheral side. The central portion of the light source substrate 1 has a circular hole. The LEDs are arranged on the front surface portion 1b of the light source substrate 1 in a ring shape with a certain interval. The outer peripheral portion of the circular hole in the central portion of the light source substrate 1 is located at a point of symmetry, and has two semicircular cutting portions 1c for avoiding screw holes. However, the number or position of the cutting portions 1c is not limited to this.

The LED-based bulb-color LEDs 1d, the daylight-colored LEDs 1e, the red LEDs 1f, and the blue LEDs 1g are disposed on the light source substrate. The number of the bulb-color LEDs 1d and the daylight-color LEDs 1e is arranged on the light source substrate 1 at a ratio of 1: 2, and a plurality of rows are arranged in a ring shape. In the bulb-color LED 1d and the daylight-color LED 1e, the light-emitting efficiency of the daylight-color LED is high due to the influence of the conversion efficiency of the phosphor or the relative visibility of the human eye. The number of the bulb-color LEDs 1d and the daylight-color LEDs 1e is configured by a ratio of 1: 2, which can improve the luminous efficiency of the lighting device 100. Furthermore, the LEDs arranged in a ring form a plurality of rows can efficiently diffuse the irradiated light over a wide range. In addition, the red LED 1f and the blue LED 1g are alternately arranged on the same ring, and the number ratio thereof is 1: 1. By setting the ratio of the number of red LEDs 1f and blue LEDs 1 to 1: 1, it is possible to easily mix red light and blue light with greatly different emission wavelengths, and to reduce the color of the light transmitted to the transparent cover 3. uniform.

Fig. 4 shows the light emission spectrum, the dotted line shows the case where only the bulb color LED 1d and the daylight LED 1e are lit, and the solid line shows the case where the red LED 1f and the blue LED 1g are additionally lit. As shown in FIG. 4, in the emission spectrum in which only the bulb-color LED 1d and the daylight-color LED 1e are emitted, the light intensity in the valley portion 9a and the inclined portion 9b is low, but the red LED 1f and the blue LED 1g are mounted. Alternatively, the valley portion 9a and the inclined portion 9b can be supplemented to achieve high color rendering.

    (LED cover)    

The LED cover 2 is made of transparent resin and is formed in a slightly ring shape. The LED cover 2 has a side surface portion 2a having an undisturbed height when it is coupled to the heat sink 4 and has a front surface at one end of the side surface portion 2a. The portion 2b has a structure of a space V surrounded by the side surface portion 2a and the front surface portion 2b. The central portion of the front surface portion 2b has a circular hole. A plurality of screw holes (not shown) for fixing the LED cover 2 are provided on the outer peripheral portion of the relatively hole. The side surface portion 2 a is a protrusion shape 2 c having a shape along the shape of the protrusion 1 a of the connection portion of the light source substrate 1. There are a plurality of wing-shaped protrusions 2d for screwing the heat dissipation plate 4 and the screw hole portion (not shown) of the LED cover 2 to other ends of the end portion of the side portion 2a having the front portion 2b. Plurality is arranged at equal intervals. The front portion 2b includes a plurality of lenses 2e for diffusing light from a light source in multiple directions. The lens 2e is a lens having a convex-shaped portion of a lens function for an LED light source, and can diffuse light emitted from an LED of a light source with a high directivity to multiple directions. The lens 2e is similar to the LED arrangement of the light source substrate 1, and is arranged at a certain interval in a ring shape. However, the interval between the lenses 2e is not limited to this, and may be the same as the LED arrangement.

    (Transparent cover)    

The light-transmitting cover 3 is made of a member prepared with a diffusing material, and its appearance is milky white, and its shape is balloon-shaped. There is space for the internal system. For the front part 3a, the end part on the opposite side has a slightly round hole, and for the end part facing the inside of the hole, there are a plurality of protrusions for engaging the holder 4e ( (Not shown). The light-transmitting cover 3 irradiates light from the LED and diffuses the light passing through the LED cover 2 so that it can be irradiated over a wide range.

    (Radiating plate)    

FIG. 3 is a perspective view of the heat sink 4. The heat sink 4 is a molded member of sheet metal, which is formed in a substantially ring shape, and has a circular hole in the center. In addition, there is an inclined surface portion 4c between the front surface portion 4a and the peripheral front surface portion 4b, and an end portion on the outer peripheral side of the front surface portion 4a and an inner peripheral side end of the front surface portion 4b. An end portion on the side has a wall-shaped protrusion 4d on the front surface portion 4a side along the periphery thereof. For the front part 4a, there are a plurality of screw holes 4e for bolting the light source substrate 1 or the LED cover 2, and for the surrounding front part 4b, there are screw holes 4f for the LED cover 2 and the back plate 7. With 4g holes for 4h. The heat dissipation plate 4 is a heat generated by the heat radiation from the LED and transmitted to the substrate (mainly the light source substrate 1), which cools the substrate, and can improve the light emitting efficiency of the LED. In addition, it is easy to reflect light when painted in white, which can improve light extraction efficiency.

    (Power supply board)    

The power supply board 5 has a shape of a rectangular long side, and one side has a slightly arc shape.

The power supply board 5 is a main control device when driving the lighting device, and performs power supply for the light emitting light source unit or controls light emission, such as lighting, turning off, and adjusting the current value.

    (Insulation board)    

The insulating plate 6 has a rectangular shape, and both ends have a slightly arc shape with different arc sizes. The insulation plate 6 has a front portion 6a. Along the outer periphery of the end portion of the front portion 6a, there are wall-shaped protrusions on the front portion 6a side. The circular hole portion has a cylindrical portion 6b from one end of the hole portion to the front surface portion 6a side. Furthermore, an inclined surface portion 6c is provided between the front surface portion 6a and the cylindrical portion 6b.

The insulating plate 6 is a member for accommodating the power source substrate 5, prevents contact between the back plate 7 and the power source substrate 5, and is an electrically insulating member for preventing electric shock and the like from leaking from the power source substrate 1.

    (Back panel)    

The back plate 7 is formed of a sheet metal molding member having a substantially ring shape, and has a circular hole in the central portion. In addition, it has a front surface portion 7a, an end portion of the front surface portion 7a, a wall-shaped projection 7b in the direction of the front surface portion 7a, and an edge 7c along the outer periphery of the wall-shaped projection 7b.

The back plate 7 surrounds the power supply substrate 5 and the insulating plate 6. Furthermore, a circular hole is provided in the central portion for connection with the installation surface (mainly a patio), and an adapter 8 can be installed in the hole portion on the installation surface such as a patio.

Claims (5)

    A lighting device comprising a light source substrate including a red LED that emits red light, a blue LED that emits blue light, a bulb-color LED that emits light in a bulb color, and a light source substrate that emits daylight-color LEDs in a light color. By.         For example, the lighting device described in the first item of the patent application scope, wherein the peak wavelength of the LED that emits the red light is 610 nm to 750 nm, the peak wavelength of the LED that emits the blue light is 470 nm to 500 nm, and the bulb emits the light The peak wavelength of the colored LED is 550 nm to 650 nm, and the peak wavelength of the LED that emits the aforementioned daylight colored light is 430 nm to 460 nm.         For example, the lighting device described in item 1 of the scope of the patent application, wherein the light source substrate is arranged with a red LED, a blue LED, a bulb-color LED, and a daylight-color LED in a ring shape; the red LED and the blue light LED are arranged Interactions are aligned in the same ring.         For example, the lighting device described in item 2 of the scope of patent application, wherein the light color irradiated through the transparent cover is not red light or blue light, but white light of 5,800K to 6,200K.         A lighting device characterized by being capable of toning or dimming light when a combination of currents input to each LED is used.