JP3167861U - Lighting device - Google Patents

Abstract

An illumination device capable of obtaining a sufficient amount of light and obtaining good color rendering at low cost is provided. An illumination apparatus A includes a light source 1, a reflecting member 2 disposed behind the light source 1, and reflecting incident light from the light source 1 toward the front, and direct light from the light source 1 and the reflecting member 2. A lens cover 3 that diffuses the reflected light forward, a colored filter 4 that is disposed in front of the lens cover 3 and is colored so as to adjust the emission color of the light source 1, and the light source 1 are electrically connected. And a base 5. The light source 1 is configured by mounting a plurality of LEDs 1b on a circuit board 1a. [Selection] Figure 1

Description

  The present invention relates to a lighting device, and more particularly, to a lighting device using a light source such as a light emitting diode (hereinafter referred to as LED (Light Emitting Diode)).

  In recent years, various lighting devices that take advantage of the long life and low power consumption characteristics of LEDs have been developed.

  In the illuminating device using LED, there existed a problem that color rendering property was low compared with other existing illuminating devices (for example, an incandescent lamp). For example, in the method of creating a pseudo white color by applying a yellow phosphor to a blue LED chip, the average color rendering index Ra is as low as 80 or less.

  Therefore, various techniques have been proposed in the past in order to improve the color rendering properties of LEDs.

  For example, it is possible to raise the average color rendering index Ra to about 95 by applying a special phosphor (for example, a red phosphor and a green phosphor) on the surface of a blue LED chip. Is referred to as Conventional Example 1).

Patent Document 1 proposes an illumination device that improves color rendering by adding a red LED to a white LED (hereinafter, this technique is referred to as Conventional Example 2).
JP 2004-363055 A

  In the prior art example 1, since a special phosphor is applied on the surface of the blue LED chip, there is a problem in that the light emission luminance of the LED is greatly reduced and a sufficient amount of light cannot be obtained.

  In the conventional example 2, a power supply circuit is required for each of the white LED and the red LED, which increases the cost, and further, due to a difference in the amount of light reduction due to the decrease in luminous flux of each of the white LED and the red LED. There has been a problem that the color rendering properties change over time.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an illumination device that can obtain a sufficient amount of light and can obtain good color rendering at low cost.

The lighting device of the present invention is
A light source;
A lens cover that diffuses light emitted from the light source forward;
A colored filter disposed in front of the lens cover and colored to adjust the emission color of the light source;
It is characterized by having.

  The light source may be an LED.

  The colored filter may be made of plastic.

According to the present invention, the light emitted from the light source is diffused by the lens cover, and the light emitted from the lens cover is emitted to the outside through the colored filter.
Thereby, since the colored filter is colored so as to adjust the emission color of the light emitted from the light source, it is possible to provide an illuminating device that exhibits high color rendering with a sufficient amount of light and an illuminating device suitable for the application.
Moreover, since only a colored filter is used, manufacturing cost can be reduced.

It is sectional drawing which shows the illuminating device which concerns on the embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a lighting device according to an embodiment of the present invention.

  As shown in FIG. 1, the illuminating device A which concerns on the 1st Example of this invention is arrange | positioned around the light source 1 and the light source 1, and the reflection member which reflects the incident light from the light source 1 toward the front. 2, a lens cover 3 for diffusing the direct light from the light source 1 and the reflected light from the reflecting member 2 forward, and disposed in front of the lens cover 3 and colored so as to adjust the emission color of the light source 1 A colored filter 4 and a base 5 electrically connected to the light source 1 are included.

  The light source 1 is configured by mounting a plurality of LEDs 1b on a circuit board 1a.

  Each LED 1b includes, for example, a blue LED chip such as GaN that emits blue light, and a color conversion unit in which particulate yellow phosphors that are excited by the light of the blue LED chip to emit light are dispersed in a resin or the like. The white light (white light emission spectrum) which consists of the synthetic | combination light of the light from a blue LED chip and the light from a color conversion part is obtained.

  The colored filter 4 is colored, for example, red, blue, green, yellow, or the like, and may be shaded and made of a synthetic resin such as plastic.

  The colored filter 4 is colored so as to adjust the emission color of the light emitted from the light source 1. For example, by using a colored filter colored in red, a high color rendering property with an average color rendering index Ra of 95 or more. It is possible to provide an illumination device A that achieves the following.

  Also, for example, by emphasizing red for meat, green for vegetables, warm colors in winter, and cool colors in summer, the colors can be colored according to the application. Can be adjusted.

According to the illumination device A according to the embodiment of the present invention, the light emitted from the light source 1 is diffused by the lens cover 3, and the light emitted from the lens cover 3 passes through the colored filter 4 to the outside. Radiated.
Thereby, since the colored filter 4 is colored so as to adjust the emission color of the light emitted from the light source, it is possible to provide an illuminating device that exhibits high color rendering with a sufficient amount of light and an illuminating device suitable for the application.
Further, since only the colored filter 4 is used, the manufacturing cost can be reduced.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical matters described in the claims for utility model registration.

  For example, a white light bulb may be used as the light source 1. In that case, the colored filter 4 is preferably made of a heat-resistant material that can withstand high temperatures.

  The present invention is used in an illumination device using a light source such as an LED.

A: Lighting device 1: Light source 1a: Circuit board 1b: LED
2: Reflecting member 3: Lens cover 4: Colored filter 5: Base

Claims (3)

A light source;
A lens cover that diffuses light emitted from the light source forward;
A colored filter disposed in front of the lens cover and colored to adjust the emission color of the light source;
A lighting device comprising:   The lighting device according to claim 1, wherein the light source is an LED.   The lighting device according to claim 1, wherein the colored filter is made of plastic.

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