KR20130111858A - Light emitting diode illumination apparatus - Google Patents

Abstract

PURPOSE: A light emitting diode lighting device is provided to enhance the energy efficiency by making the device turn on or off depending on the external brightness. CONSTITUTION: A first sensor unit (120) senses the first light. A second sensor unit (125) senses the second light. The first and second sensor units are placed on a substrate. At least one light emitting diode radiates the third light. A lens integrated diffuser (130) is arranged on the substrate. [Reference numerals] (120) Illumination sensor; (125) Infrared sensor; (140) Voltage regulator; (145) Controller

Description

Light emitting diode illumination apparatus

The present invention relates to a lighting device, and more particularly to a lighting device using a light emitting diode.

In order to increase and save energy efficiency, an energy-efficient lighting system that flashes automatically according to external brightness is used. The lighting system includes an illumination sensor for detecting ambient brightness and an infrared sensor for detecting human body heat. Ambient light sensor can detect the brightness of visible light of the external environment and control the blinking of the lighting system accordingly, and infrared sensor can control the blinking of the lighting system by detecting infrared light emitted from an object that emits heat such as a human body. .

However, in such a lighting system, a lighting device, an illuminance sensor, and an infrared sensor using a light emitting diode (LED) are provided as separate products to constitute a lighting system, thereby limiting the miniaturization and further integration of the lighting system. .

The present invention has been made to solve various problems including the above problems, and an object of the present invention is to provide a light emitting diode lighting device that can be integrated or miniaturized. However, these problems are exemplary and do not limit the scope of the present invention.

A light emitting diode lighting device according to an aspect of the present invention is provided. A substrate is provided, and a first sensor portion for sensing a first light having a first wavelength is provided on the substrate. A second sensor portion is provided on the substrate to sense a second light having a second wavelength longer than the first wavelength. At least one light emitting diode is provided on the substrate to emit a third light having a third wavelength shorter than the second wavelength. A lens coupling diffuser unit is disposed on the substrate to surround the at least one light emitting diode, the first sensor unit, and the second sensor unit, and has a lens function for condensing the second light and a diffuser function for dispersing the third light. Perform simultaneously.

In the LED lighting device, the first light may include visible light or near infrared light, and the second light may include mid-infrared light or far infrared light. In addition, the first sensor unit may include an illumination sensor, and the second sensor unit may include a human body sensor.

In the light emitting diode lighting device, the lens coupling diffuser may include polyethylene as a material for transmitting the second light.

In the light emitting diode illuminator, the lens coupling diffuser may include a Fresnel lens portion for collecting the second light on an inner surface thereof.

The LED lighting apparatus may further include a controller for controlling the first sensor unit and the second sensor unit, and further include a constant voltage regulator for controlling the voltage applied to the controller and the light emitting diode in common. .

The LED lighting device may further include a housing surrounding the controller and the constant voltage device, and the lens-linked diffuser unit may be coupled to the housing in a bulb shape.

In the light emitting diode lighting device, the at least one light emitting diode, the first sensor unit and the second sensor unit may be disposed on one surface of the substrate, and the controller and the constant voltage group may be disposed on the other surface of the substrate. have.

The LED lighting apparatus may further include a temperature sensor on the substrate for sensing a temperature.

The light emitting diode lighting device according to the embodiment of the present invention made as described above may have an integrated structure, and thus may have a smaller volume than a conventional lighting device. These effects are exemplarily described, and the scope of the present invention is not limited by these effects.

1 is a schematic cross-sectional view showing a light emitting diode lighting apparatus according to an embodiment of the present invention.
2 is a schematic perspective view illustrating a lens coupling diffuser in light emitting diode lighting apparatuses according to embodiments of the present invention.
3 is a schematic cross-sectional view showing a light emitting diode lighting apparatus according to another embodiment of the present invention.
Figure 4 is a schematic cross-sectional view showing a light emitting diode lighting device according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, Is provided to fully inform the user. Also, for convenience of explanation, the components may be exaggerated or reduced in size.

1 is a schematic cross-sectional view showing a light emitting diode lighting apparatus according to an embodiment of the present invention.

Referring to FIG. 1, a substrate 105 may be provided, and at least one light emitting diode (LED) 110, a first sensor unit 120, and a second sensor unit 125 may be provided thereon. For example, the substrate 105 may include a wiring pattern for connecting a power supply to the light emitting diode 110, the first sensor unit 120, and the second sensor unit 125, and further, an active or passive element may be coupled. The printed circuit board may include a printed circuit pattern. Such a substrate 105 may include various types such as rigid substrates, flexible substrates, tape substrates, and the like.

The first sensor unit 120 may be provided on the substrate 105 to sense the first light L1 having the first wavelength. For example, the first light L1 may include visible light in the wavelength range of about 380 nm to 650 nm and / or near infrared ray (NIR) in the wavelength range of about 780 nm to about 1400 nm. For example, the first sensor unit 120 may include an illuminance sensor that can measure the brightness of the surroundings using the first light L1. With such an illuminance sensor, the first sensor unit 120 may include a solar sensor such as a photovoltaic sensor or a photoconductive sensor.

The second sensor unit 125 may be provided on the substrate 105 to detect the second light L2 having the second wavelength. The second light L2 may comprise mid-infrared (MIR) in the wavelength range of about 1400 nm to 3500 nm longer than the first wavelength and / or far infrared (FIR) in the wavelength range of about 1400 nm to 14 μm. For example, the second sensor unit 125 may include an infrared sensor for detecting human body heat using the second light L2.

As such an infrared sensor, the second sensor unit 120 may include various infrared sensors, such as a thermopile sensor, a bolometer sensor, or a pyrometer sensor. The thermopile sensor generates thermal energy as an electrical signal by the Seebeck effect, the bolometer sensor generates an electrical signal as a resistance change with temperature, and the pyrometer sensor uses a pyroelectric phenomenon Radiation can be generated as an electrical signal.

The at least one light emitting diode 110 may be used as a light source of an illumination device or an electronic device as an element that receives an electric signal and emits a third light L3. For example, the light emitting diode 110 may be composed of a diode of a compound semiconductor, and the light emitting diode 110 may emit light of various colors according to the material of the compound semiconductor. For example, the wavelength of the third light L3 may include visible light and / or near infrared light, in which the second light L2 is shorter than the wavelength. One light emitting diode 110 may be provided on the substrate 105 or a plurality of light emitting diodes 110 may be provided on the substrate 105. For example, the light emitting diodes 110 may be provided to the light emitting diode package 115 through a packaging process, as shown in FIG. 3.

The lens integrated diffuser 130 may be disposed on the substrate 105 to surround the light emitting diode 110, the first sensor unit 120, and the second sensor unit 125. For example, the lens coupling diffuser 130 emits the third light L3 emitted from the light emitting diode 110 and is incident to the first sensor 120 and the second sensor 125. It may have a light transmitting material or structure so as to pass through (L1) and the second light (L2). For example, the lens coupling diffuser 130 may include a polymer material capable of transmitting visible light and infrared light, for example, polyethylene (PE) material.

The lens coupling diffuser 130 has a diffuser function for dispersing the third light L3 emitted from the light emitting diode 110 and a lens function for condensing the second light L2 incident on the second sensor unit 125. You can have it at the same time. That is, the third light L3 is dispersed while passing through the lens coupling diffuser portion 130 so that it can be uniformly spread around the lens to reduce glare, and the second light L2 passes through the lens coupling diffuser portion 130. The light may be collected and incident on the second sensor unit 125 to be detected. Accordingly, the light emitting diode 110, the first sensor unit 120, and the second sensor unit 125 using light having different wavelengths may be integrally coupled in the lens coupling diffuser unit 130.

The controller 145 may be provided to control the first sensor unit 120, the second sensor unit 125, and / or the light emitting diode 110. For example, the controller 145 measures the ambient illuminance from the intensity of the electrical signal generated by the first sensor unit 120 and determines whether a person is near from the intensity of the electrical signal generated by the second sensor unit 125. In operation, the operation of the light emitting diodes 110 may be controlled.

The constant voltage generator 140 may be commonly connected to the first sensor unit 120, the second sensor unit 125, and the light emitting diode 110 so as to control the voltages applied in common. The constant voltage generator 140 may perform a function of lowering or applying a voltage applied to the first sensor unit 120, the second sensor unit 125, and the light emitting diode 110, or a direct current converter. (DC converter) may be included. Compared to the arrangement of the LED lighting device, the light sensor part, and the human body sensor part separately in the conventional lighting device, in this embodiment, the light emitting diode 110, the first sensor part 120, and the second sensor part 125 are used. ) May share a single voltage regulator 140 to simplify the overall structure.

The first sensor unit 120, the second sensor unit 125, and the light emitting diode 110 are disposed on one surface of the substrate 105, and the controller 145 and the voltage regulator 140 are opposite to the substrate 105. Disposed on the other surface of the substrate) and may be electrically connected to the first and second sensor units 120 and 125 through an internal circuit of the substrate 105. However, such an arrangement is illustrated as an example, and the controller 145, the constant voltage generator 140, and the first and second sensor units 120 and 125 may be disposed on the same surface of the substrate 105.

According to the light emitting diode lighting device, all of the light emitting diode 110, the first sensor unit 120 and the second sensor unit 125 can be combined in one lighting device. In the conventional light emitting diode lighting system, the LED lighting device, the illuminance sensor unit, and the human body sensor unit are all provided separately and electrically connected to each other. Both the sensor unit 120 and the second sensor unit 125 may be combined. Accordingly, the light emitting diode lighting apparatus according to this embodiment may have an integrated structure, and thus may have a smaller volume than a conventional lighting apparatus.

Hereinafter, an example of using the lighting device will be described.

The first sensor unit 120 may detect illuminance, and the second sensor unit 125 may detect a movement of an object that emits heat. In a bright environment, such as during the day, the first electrical signal generated from the first sensor unit 120 may exceed a set reference, so that the controller 145 may provide an off signal to the light emitting diode 110. Can be. In this case, the magnitude of the second electrical signal generated from the second sensor unit 125 may not be considered.

In a dark environment such as at night, the first electrical signal may not reach the set reference. In this case, the controller 145 controls the lighting device according to the second electrical signal. For example, if there is no living body and no infrared light is generated, the second electrical signal is not generated, and thus the controller 145 provides an off signal to the light emitting diode 110, thereby illuminating the lighting device. Does not turn on. On the other hand, when there is a living body around, a second electrical signal is generated from the second sensor unit 125 by infrared rays generated from the living body, the controller 145 provides an on signal to the light emitting diode 110, The luminaire is thereby turned on.

2 is a schematic perspective view illustrating a lens coupling diffuser unit 130a in light emitting diode lighting devices according to embodiments of the present invention.

Referring to FIG. 2, the lens coupling diffuser 130a may include a Fresnel lens 132 for condensing infrared light. The Fresnel lens unit 132 is a lens obtained by dividing the lens into a plurality of bands and may be used to reduce the overall thickness. For example, the Fresnel lens portion 132 may be included on the inner surface of the lens coupling diffuser portion 130a. The lens coupling diffuser 130a may be integrally manufactured by processing the Fresnel lens 132 inside the polyethylene processing unit.

The Fresnel lens portion 132 may be formed on a part or all of the inner side of the lens coupling diffuser portion 130a, and is formed to be limited to the inner center of the lens coupling diffuser portion 130a as shown in FIG. 2, for example. Can be. The second light L2, for example, infrared light, which has passed through the Fresnel lens unit 132 may be collected and incident on the second sensor unit 125. Accordingly, the light emitting diode 110, the first sensor unit 120, and the light are transmitted through the Fresnel lens unit 132 and the visible light and infrared rays are made of polyethylene, and condensed through the Fresnel lens unit 132. By combining all of the second sensor unit 125, it is possible to form an integrated structure lighting device.

3 is a schematic cross-sectional view showing a light emitting diode lighting apparatus according to another embodiment of the present invention. The luminaire according to this embodiment corresponds to the addition or modification of some configurations in the configurations of the above-described FIG. 1 and FIG.

Referring to FIG. 3, the light emitting diode lighting apparatus according to this embodiment may be provided as a lighting bulb. The lens coupling diffuser 130a may be coupled to the housing 150 in a bulb shape. Accordingly, the light emitting diode package 115, the first sensor unit 120, the second sensor unit 125, the constant voltage generator 140, and the controller 145 may be combined in the bulb shape. For example, the housing 150 is disposed to surround the voltage regulator 140 and the controller 145, and the light emitting diode 110, the first sensor unit 120, and the second sensor in the lens coupling diffuser unit 130a. The unit 125 may be disposed. The constant voltage generator 140 may be coupled to an external socket through a screw connection portion 155 coupled to an end of the housing 150 to be connected to an external power source.

Figure 4 is a schematic cross-sectional view showing a light emitting diode lighting device according to another embodiment of the present invention. The luminaire according to this embodiment corresponds to the addition or modification of some components in the above-described configurations of the luminaires of FIGS. 1 to 3, and thus redundant descriptions between them are omitted.

Referring to FIG. 4, the lighting apparatus may further include a temperature sensor 127. For example, the temperature sensor 127 may be coupled onto a substrate (see 105 in FIG. 1) to measure the internal temperature of the luminaire. When the second sensor unit 125 is an infrared sensor such as a thermopile or a bolometer, since the temperature can be measured through the second sensor unit 125, the temperature sensor 127 may be omitted, but the second sensor unit 125 may be omitted. If it is difficult to measure the temperature through the temperature sensor 127 can be measured inside the temperature separately.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

105: substrate 110: light emitting diode
115: light emitting diode package 120: first sensor unit
125: second sensor unit 130, 130a: lens coupling diffuser unit
132: Fresnel lens unit 140: constant voltage
145: controller

Claims (8)

Board;
A first sensor unit on the substrate for sensing a first light having a first wavelength;
A second sensor unit on the substrate for sensing second light having a second wavelength longer than the first wavelength;
At least one light emitting diode on said substrate, emitting at least a third light having a third wavelength shorter than said second wavelength;
Disposed on the substrate to surround the at least one light emitting diode, the first sensor unit, and the second sensor unit, and simultaneously performing a lens function for condensing the second light and a diffuser function for dispersing the third light A light emitting diode illuminator comprising a lens coupling diffuser. The method of claim 1, wherein the first light comprises visible light or near infrared light and the second light comprises mid-infrared light or far infrared light,
The first sensor unit comprises an illuminance sensor, the second sensor unit includes an infrared sensor for detecting human body heat, LED lighting device. The light emitting diode illuminator of claim 2, wherein the lens coupling diffuser part comprises polyethylene as a material for transmitting the second light. The light emitting diode illuminator of claim 2, wherein the lens-coupled diffuser portion comprises a Fresnel lens portion on the inner surface for collecting the second light. The method of claim 1,
A controller for controlling the first sensor unit and the second sensor unit; And
And a constant voltage regulator for controlling the voltage applied to the controller and the light emitting diode in common. The light emitting diode illuminator of claim 5, further comprising a housing surrounding the controller and the constant voltage regulator, wherein the lens coupling diffuser portion is coupled to the housing in a bulb shape. The light emitting diode of claim 5, wherein the at least one light emitting diode, the first sensor portion, and the second sensor portion are disposed on one surface of the substrate, and the controller and the constant voltage group are disposed on the other surface of the substrate. Lighting equipment. The light emitting diode illuminator of claim 1, further comprising a temperature sensor on the substrate for sensing a temperature.

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