KR20200114421A - Led lighting device with blue light and color rendering control function - Google Patents

Abstract

The present invention relates to an LED lighting device and, more specifically, to an LED lighting device with a blue light and color rendering control function. An objective of the present invention is to increase color rendering while reducing the blue component of the LED lighting device and maintain luminous flux. The present invention has an effect of maintaining luminous flux by controlling the brightness of the entire light generated by a compensation light LED and a white light LED to maintain the brightness at preset luminous flux. The present invention also has an effect of increasing color rendering by compensating light in the remaining band excluding a blue band in a white light spectrum generated by a white light LED through a compensation light LED. The present invention also has an effect of reducing manufacturing costs by having the number of compensation LEDs smaller than the number of white light LEDs in comparison to the LED lighting device using dedicated LED components with high color rendering to increase color rendering. The present invention also has an effect of increasing the action efficiency of a user by providing various lighting modes based on time information.

Description

LED lighting device with blue light and color rendering control function {LED LIGHTING DEVICE WITH BLUE LIGHT AND COLOR RENDERING CONTROL FUNCTION}

The present invention relates to an LED lighting device, and more particularly, to an LED lighting device having a function of adjusting blue light and color rendering.

In general, in order to emit white light, LED lighting devices combine multiple light source devices that emit light of different colors (Red, Green, and Blue) through the principle of light synthesis, or to a single blue light source device. White light is emitted by applying a phosphor having a complementary color relationship.

However, the white light emitted from the LED lighting device contains a blue light component, and because blue light has higher energy than other lights, it is not absorbed by the cornea or lens of the eye, but reaches the retina, causing fatigue in the eyeball. In addition, blue light causes eye diseases such as dry eye syndrome, decreased vision, astigmatism, and, in severe cases, cataracts and macular degeneration, and has a fatal adverse effect on the eyes of infants with less developed lens.

In order to solve this problem, the LED lighting device industry recently attenuates blue light by providing a blue light blocking member such as a separate film and filter in the LED lighting device to block blue light or by increasing the proportion of phosphors of a specific color.

However, the conventional LED lighting apparatus has a problem in that a blocking member such as a separate film and a filter for blocking blue light is provided in a portion from which light is emitted, thereby causing loss of light energy by the blocking member, resulting in a decrease in light efficiency.

In addition, by increasing the ratio of phosphors of a specific color to attenuate blue light, there is a problem that the color rendering index is relatively low in some wavelengths of light corresponding to a specific color, and light extraction efficiency is lowered, resulting in lower color rendering and energy efficiency. .

1. Korean Patent Registration No. 10-1866959 (announced on 14 June 2018) 2. Korean Patent Registration No. 10-1638322 (announced on July 11, 2016)

The present invention is to solve the above problems, it is an object to reduce the blue light component of the LED lighting device, increase the color rendering property, and maintain the luminous flux.

The LED lighting device having a function of adjusting blue light and color rendering according to a preferred embodiment of the present invention for achieving the above object includes a substrate including a first surface formed with a predetermined area, and the entire first surface of the substrate It is provided and is provided in a number of white light LEDs arranged in a predetermined first arrangement method, a number less than the number of white LEDs, and at least one compensation light LED arranged in a second arrangement method, the white light LED, and the compensation light It characterized in that it comprises a control module for controlling the white light LED and the compensation light LED so that the brightness of the entire light generated by the LED is maintained at a preset light flux.

In addition, the compensation light LED is characterized in that it generates a compensation light for compensating the light in a band other than the blue band in the white light spectrum generated by the white light LED.

In addition, the compensation light LED is characterized in that the red light LED.

In addition, the compensation light LED is characterized in that the green light or cyan light LED.

In addition, when the white light flux of the white light LED is varied according to a preset illumination mode, the control module controls the compensation light LED to compensate for a difference value between the preset light flux and the white light flux.

As described above, the present invention has the effect of maintaining the light flux by controlling the brightness of the entire light generated by the white light LED and the compensation light LED to be maintained at a preset light flux.

In addition, by compensating for light in a band other than the blue band in the white light spectrum in which the white light LED is generated through the compensation light LED, there is an effect of improving color rendering.

In addition, in order to increase color rendering, the number of compensating light LEDs is less than the number of white light LEDs compared to an LED lighting device using a dedicated LED component having a high color rendering property, thereby reducing manufacturing cost.

In addition, by providing various lighting modes based on time information, there is an effect of increasing the behavioral efficiency of the user.

1 is a schematic diagram of a system to which an LED lighting device having a function of adjusting blue light and color rendering is applied according to a preferred embodiment of the present invention.
2 is a plan view of an LED lighting device having a function of adjusting blue light and color rendering according to a preferred embodiment of the present invention.
3 is a view for explaining a method of compensating the light of the band other than the blue band of the compensation light LED according to the present invention.
4 is a functional block diagram of the compensation light LED of FIG. 1.
5 is a functional block diagram of the control module of FIG. 1.
6 is a view for explaining a method of controlling the light flux in the morning time of the control module according to the present invention.
7 is a view for explaining a method of controlling the light flux in the afternoon time of the control module according to the present invention.
8 is a view for explaining a method of controlling the light flux in the evening time of the control module according to the present invention.

In the present invention, various modifications may be made and various embodiments may be provided, and specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to a specific embodiment, it is to be understood to include all changes, equivalents, or substitutes included in the spirit and scope of the present invention.

In describing each drawing, similar reference numerals have been used for similar elements. In describing the present invention, when it is determined that a detailed description of a related known technology may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

Terms such as first and second may be used to describe various elements, but the elements should not be limited by the terms. These terms are used only for the purpose of distinguishing one component from another component.

For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

The term and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

The terms used in the present application are used only to describe specific embodiments, and are not intended to limit the present invention.

Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs.

Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

Hereinafter, an LED lighting device having a function of adjusting blue light and color rendering according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. 1 is a schematic diagram of a system to which an LED lighting device having a function of adjusting blue light and color rendering is applied according to a preferred embodiment of the present invention. 2 is a plan view of an LED lighting device having a function of adjusting blue light and color rendering according to a preferred embodiment of the present invention. 3 is a view for explaining a method of compensating the light of the band other than the blue band of the compensation light LED according to the present invention. 4 is a functional block diagram of the compensation light LED of FIG. 1. 5 is a functional block diagram of the control module of FIG. 1. 6 is a view for explaining a method of controlling the light flux in the morning time of the control module according to the present invention. 7 is a view for explaining a method of controlling the light flux in the afternoon time of the control module according to the present invention. 8 is a view for explaining a method of controlling the light flux in the evening time of the control module according to the present invention. Hereinafter, descriptions of conventionally known matters are omitted or simplified to clarify the subject matter of the present invention.

Referring to FIG. 1, a system to which an LED lighting device having a function of adjusting blue light and color rendering is applied (1) can control blue light by controlling the white light flux generated from the white light LED 100, and the compensation light LED 200 By controlling the compensation luminous flux generated from the color rendering property, it is possible to maintain a preset luminous flux. The system 1 to which an LED lighting device having a function of adjusting blue light and color rendering is applied may include a white light LED 100, a compensation light LED 200, and a control module 300.

2 to 3, the white light LED 100 may be provided over the entire first surface 11 of the substrate 10, and may be arranged in a predetermined first arrangement method. In addition, the white light LED 100 may generate white light having a wavelength range of 380 nm to 740 nm under the control of the white light control unit 350. Here, the white light may mainly include a blue light component having a wavelength range of 450 nm to 485 nm.

The substrate 10 may include a first surface 11 formed with a predetermined area, and is formed of a material such as a PCB and a ceramic, such as a white light LED 110, a red light LED 210, and a green light LED 220. Electronic components can be fixed, and power supply and operation control signals (PWM) can be applied by electrically connecting the fixed electronic components. Here, the first surface 11 formed with a predetermined area is described as a square, but if the electronic component is fixed and the electronic component to be fixed can be electrically connected, it can be replaced with various shapes according to the installation environment.

The preset first arrangement method may be an arrangement method to evenly provide appropriate illuminance to the user according to the installation environment, and may be a method uniformly arranged at regular intervals according to the area of the first surface 11. .

The compensating light LEDs 200 may be provided in a smaller number than the number of white light LEDs 100, and may be arranged in a preset second arrangement method. In addition, the compensation light LED 200 may be provided in at least one number, and the light in the remaining bands except the blue band in the white light spectrum generated by the white light LED 100 is compensated by the control of the compensation light control unit 370 It may generate a compensating light. The compensation light LED 200 may include a red light LED 210 and a green light LED 220.

The second preset arrangement is an arrangement for inducing the synthesis of light between the white light and the compensation light by overlapping the compensation light irradiation area 230 of the compensation light LED 200 on the white light irradiation area 110 of the white light LED 100 The method may be a method, and the color rendering property may be increased by synthesis of light, and a method may be arranged in a minimum number capable of maintaining a preset light flux. In addition, the preset second arrangement method is partially concentrated in the center of the first surface 11 due to the shape of the lens unit (not shown) that may be provided on the emission surface of the white light LED 100 and the compensation light LED 200. It may be arranged in a way.

The lens unit may be provided on the light emitting surface of the white light LED 100 and the compensation light LED 200, and may be formed in a curved shape to cover and seal the white light LED 100 and the compensation light LED 200. In addition, the lens unit may be formed of a material having excellent light transmittance and heat resistance such as silicon, epoxy, glass, and plastic, and a fluorescent material is coated on a surface to improve light extraction efficiency of light incident by the fluorescent material. Here, the lens unit is described as a curved shape, but may be replaced with a shape capable of improving light extraction efficiency of incident light.

The red light LED 210 may generate red light having a wavelength range of 625 nm to 740 nm under the control of the compensation light control unit 370, and compensate the light in the red band in the white light spectrum of the white light LED 100. have. Here, the red light LED 210 is described as red light having a wavelength range of 625 nm to 740 nm, but is replaced with light of another color capable of compensating for light in the rest of the band except the blue band in the white light spectrum through the light synthesis principle. Can be.

The green light LED 220 may generate green light having a wavelength range of 485 nm to 565 nm under the control of the compensation light control unit 370, and compensate for light in the green band in the white light spectrum of the white light LED 100. have. Here, the green LED 220 is described as green light having a wavelength range of 485 nm to 565 nm, but cyan light (Cyan) capable of compensating for light in the remaining bands except the blue band in the white light spectrum through the light synthesis principle It can be replaced with light of the same other color.

4 to 5, the control module 300 includes a white light LED 100 and a compensation light LED to maintain the brightness of the entire light generated by the white light LED 100 and the compensation light LED 200 at a preset light flux. 200 can be controlled, and when the white light flux of the white light LED 100 is varied according to a preset lighting mode, the compensation light LED 200 may be controlled to compensate for a difference value between the preset light flux and the white light flux. . The control module 300 includes a control signal receiving unit 310, a luminous flux setting unit 320, a time information unit 330, an illumination mode setting unit 340, a white light control unit 350, a luminous flux comparison unit 360, and a compensation light control unit. It may include 370.

The control signal receiving unit 310 may receive a control signal from a user by wire or wirelessly, and may provide the input control signal to the light flux setting unit 320. Here, the control signal may be a first signal for turning on the LED lighting device and a second signal for turning off, and may further include a third signal for setting a required luminous flux according to a user's selection.

6 to 8, the luminous flux setting unit 320 may receive a control signal from the control signal receiving unit 310 to determine a preset luminous flux, and may provide the determined luminous flux value to the time information unit 330. . When the first signal is input, the luminous flux setting unit 320 may determine a preset luminous flux as 100% to provide a general illuminance that does not interfere with a person's behavior, and when the second signal is input, the illuminance is not provided. In order not to do so, the preset luminous flux can be determined as 0%. In addition, when a third signal is input, the luminous flux setting unit 320 may determine a preset luminous flux as 0 to 100% according to a user's selection.

The time information unit 330 may receive the determined luminous flux value from the luminous flux setting unit 320 to detect the current time, and may provide the detected time information to the illumination mode setting unit 340.

The illumination mode setting unit 340 may receive time information from the time information unit 330 to determine a preset illumination mode, and provide a white light flux value according to the determined illumination mode to the white light control unit 350.

The preset lighting mode may be determined based on time information, and a white light flux suitable for a user's behavior may be determined by dividing it into morning time, afternoon time, and evening time.

In the case of the morning time, a white light flux of white light mainly including a blue light component that helps to see an object clearly and increases concentration may be determined as a preset first light flux value. Here, the preset first luminous flux value is described as 60%, but may be experimentally varied according to the performance of the white light LED 100 and the installation environment.

In the case of the afternoon time, a white light flux of white light mainly including a blue light component may be determined as a preset second light flux value so that the user can feel comfortable. Here, the preset second luminous flux value is described as 40%, but may be experimentally varied according to the performance of the white light LED 100 and the installation environment.

In the case of evening time, a white light flux of white light mainly including a blue light component may be determined as a preset third value for rest and comfort of the user. Here, the preset second luminous flux value is described as 20%, but may be experimentally varied according to the performance of the white light LED 100 and the installation environment.

The white light control unit 350 may receive a white light flux value from the illumination mode setting unit 340 and control the white light flux of the white light LED 100. Here, the control method may be a method of controlling the white light flux of the white light LED 100 by changing a voltage applied to the white light LED 100 through PWM control.

The luminous flux comparison unit 360 may detect a difference value between a preset luminous flux determined by the luminous flux setting unit 320 and a white luminous flux determined by the illumination mode setting unit 340, and compensate for the detected difference value. 370). Here, the detection method may be a value corresponding to a difference between a voltage value measured through an experiment to provide a preset light flux and a voltage applied to the white light LED 100, and the light flux difference between a preset light flux and a variable white light flux is determined. The method is not limited as long as it can be detected.

The compensation light control unit 370 may receive a difference value detected from the light flux comparison unit 360 and control the compensation light flux of the compensation light LED 200. Here, the control method may be a method of controlling the compensation light flux of the compensation light LED 200 by changing a voltage applied to the compensation light LED 200 through PWM control.

The present invention is not limited to the specific preferred embodiments described above, and anyone of ordinary skill in the technical field to which the present invention pertains without departing from the gist of the present invention claimed in the claims can implement various modifications Of course, such changes are within the scope of the claims.

1: A system to which an LED lighting device with blue light and color rendering control function
2: LED lighting device with blue light and color rendering control function
10: substrate
11: first side
100: white light LED
110: white light irradiation area
200: compensation light LED
210: red light LED
220: Green light LED
230: compensation light irradiation area
300: control module
310: control signal receiver
320: luminous flux setting unit
330: Time Information Department
340: lighting mode setting unit
350: white light control unit
360: light flux comparison unit
370: compensation light control unit

Claims (5)

A substrate including a first surface formed with a predetermined area;
A white light LED provided over the entire first surface of the substrate and arranged in a first arrangement manner;
At least one compensating light LED provided in a number less than the number of white light LEDs and arranged in a predetermined second arrangement method;
LED having a function of adjusting blue light and color rendering, comprising a control module for controlling the white light LED and the compensation light LED so that the brightness of the entire light generated by the white light LED and the compensation light LED is maintained at a preset light flux. Lighting device. The method of claim 1,
The compensation light LED is an LED lighting device having a function of adjusting blue light and color rendering, characterized in that for generating a compensation light for compensating the light of the band other than the blue band in the white light spectrum generated by the white light LED. The method of claim 1,
The compensation light LED is an LED lighting device having a function of adjusting blue light and color rendering, characterized in that the red light LED. The method of claim 3,
The compensation light LED is an LED lighting device having a function of adjusting blue light and color rendering, characterized in that the green light or cyan light LED. The method of claim 1,
The control module controls the compensation light LED to compensate for a difference value between the preset light flux and the white light flux when the white light flux of the white light LED is varied according to a preset illumination mode. LED lighting device with.

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