KR20170101711A - Light emitting device for preventing sleep disturbance - Google Patents

Abstract

Disclosed is a light emitting element for preventing sleep disorder. The light emitting element for preventing sleep disorder comprises: a first light emitting diode chip having a first peak wavelength in a range of 410 to 435 nm; and a second light emitting diode chip having a second peak wavelength within a range of 440 to 470 nm, wherein the first light emitting diode chip and the second light emitting diode chip can be independently driven.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a light-

The present invention relates to a light emitting device suitable for preventing sleeping disorder.

In modern society, people's nighttime activities are increasing due to the development of industry. Accordingly, the frequency with which a person uses a color display device such as a mobile phone or a TV at night is gradually increasing. However, the blue light among the light emitted from the display device greatly inhibits the secretion of melatonin, which is a hormone involved in the biological rhythm, to cause a sleeping disorder.

In order to solve this problem caused by inhibition of melatonin secretion by blue light, a blue color removal filter can be used to remove blue light emitted from a display device. By using the filter, it is possible to reduce the intensity of the blue light and prevent melatonin secretion inhibition. However, as the intensity of the blue light is weakened, the displayed color is yellowed and it is difficult to realize an accurate color.

Accordingly, development of a light emitting device capable of solving the above problems is required.

A problem to be solved by the present invention is to provide a light-emitting element for preventing sleep disorder with less inhibition of melatonin secretion while preventing yellowing.

Another problem to be solved by the present invention is to provide a backlight light source for preventing sleep disorder with less inhibition of melatonin secretion while preventing yellowing.

Another object of the present invention is to provide a driving system for a light-emitting element for preventing sleep disturbance.

According to an aspect of the present invention, there is provided a light emitting device for preventing sleep disorder, comprising: a first light emitting diode chip having a first peak wavelength within a range of 410 to 435 nm; And a second light emitting diode chip having a second peak wavelength within a range of 440 to 470 nm, wherein the first light emitting diode chip and the second light emitting diode chip are independently drivable.

According to another aspect of the present invention, there is provided a backlight light emitting module for preventing sleep disturbance, comprising: a first light emitting diode chip having a first peak wavelength within a range of 410 to 435 nm; And a second light emitting diode chip having a second peak wavelength within a range of 440 to 470 nm, wherein the first light emitting diode chip and the second light emitting diode chip are independently drivable.

According to another aspect of the present invention, there is provided a light emitting device driving system for preventing sleep disturbance, comprising: a first light emitting diode chip having a first peak wavelength within a range of 410 to 435 nm; And a second light emitting diode chip having a second peak wavelength within a range of 440 to 470 nm, wherein the first light emitting diode chip and the second light emitting diode chip are independently drivable.

According to the present invention, a second light emitting diode chip having a strong inhibition of melatonin secretion and a first light emitting diode chip having a weak melatonin secretion inhibition can be used together, and they can be independently driven. Therefore, It is possible to provide a light emitting device for preventing sleep disorder that can reduce the melatonin secretion inhibiting effect as needed. Further, by using the light emitting element as a backlight source, it is possible to prevent a sleeping disorder caused by a display device such as a cellular phone or a TV. Furthermore, it is possible to provide a light emitting device driving system for preventing sleep disorder, which can reduce the melatonin secretion suppressing effect while preventing the yellowing by independently driving the first and second LED chips.

FIG. 1 is a graph showing the relative magnitude of inhibition of melatonin secretion according to the wavelength of light.
2 is a schematic cross-sectional view for explaining a light-emitting element for preventing sleeping disorder according to an embodiment of the present invention.
3 is a schematic cross-sectional view illustrating a light-emitting device for preventing sleeping disorder according to another embodiment of the present invention.
4 is a schematic cross-sectional view illustrating a backlight light emitting module for preventing sleeping disorder according to an embodiment of the present invention.
5 is a schematic block diagram for explaining a driving system of a light emitting device for preventing sleeping disorder according to an embodiment of the present invention.
6 is a spectrum of light emitted from a light-emitting element for preventing sleeping disorder according to another embodiment of the present invention.
7 is a spectrum obtained by transmitting light emitted from a light-emitting element for preventing sleep disturbance according to another embodiment of the present invention to a display color filter.
FIG. 8 is a graph showing the spectrum showing the relative magnitude of the melatonin secretion inhibiting effect and the spectrum of the light source according to the peak wavelength.

According to an aspect of the present invention, there is provided a light emitting device for preventing sleep disorder, comprising: a first light emitting diode chip having a first peak wavelength within a range of 410 to 435 nm; And a second light emitting diode chip having a second peak wavelength within a range of 440 to 470 nm, wherein the first light emitting diode chip and the second light emitting diode chip are independently drivable.

The first light emitting diode chip having the first peak wavelength and the second light emitting diode chip having the second peak wavelength can be independently driven. Therefore, if necessary, the second light emitting diode chip is turned off to prevent the melatonin secretion suppression And the first light emitting diode chip can be used. Accordingly, it is possible to provide a light emitting device for preventing sleep disorder with less melatonin secretion inhibition while preventing yellowing and realizing accurate color.

The first light emitting diode chip may have a first peak wavelength in a range of 420 to 430 nm. Accordingly, it is possible to reduce the relative value of the melatonin secretion inhibiting effect to 0.6 or less and to provide the blue light component that replaces the blue light emitted from the second LED chip.

The light emitting device for preventing sleep disorder further includes a green light emitting body and a red light emitting body, wherein the green light emitting body emits green light by the light emitted from the first or second light emitting diode chip, 2 Red light can be emitted by the light emitted from the light emitting diode chip. Accordingly, color and white light of various colors can be realized.

The green light emitting body includes a first green light emitting body emitting green light by the light emitted from the first light emitting diode chip; And a second green light emitting body for emitting green light by the light emitted from the second light emitting diode chip, wherein the red light emitting body comprises: a first red light emitting body emitting red light by light emitted from the first light emitting diode chip; And a second red light emitting unit emitting red light by the light emitted from the second light emitting diode chip. Accordingly, it is possible to adopt a light emitting body capable of efficiently changing the wavelength by the light emitted from each light emitting diode chip.

The green light emitter may have a peak wavelength between 515 nm and 555 nm. Also,

The red light emitter may have a peak wavelength between 620 nm and 660 nm. Accordingly, colors of various colors can be realized.

The green light emitting body and the red light emitting body may include at least one of a sulfide, a silicate, an Aluminite, a Fluoride, a nitride, and a Quantum Dot. These phosphors and quantum dots exhibit high light intensity in a relatively narrow wavelength range and are therefore suitable for a backlight source of a display.

The light emitting device for preventing sleep disorder may further include a body portion having a cavity, and the first light emitting diode chip, the second light emitting diode chip, the green light emitting body, and the red light emitting body may be located in the cavity of the body portion. Accordingly, the first light emitting diode chip, the second light emitting diode chip, the green light emitting body, and the red light emitting body can be stably arranged.

Furthermore, the body portion may include a first cavity; And a second cavity, wherein the green light emitter comprises: a first green light emitter emitting green light by light emitted from the first light emitting diode chip; And a second green light emitting body for emitting green light by the light emitted from the second light emitting diode chip, wherein the red light emitting body comprises: a first red light emitting body emitting red light by light emitted from the first light emitting diode chip; And a second red light emitting unit emitting red light by the light emitted from the second light emitting diode chip. The first light emitting diode chip, the first green light emitting body, and the first red light emitting body are disposed in the first cavity, and the second light emitting diode chip, the second green light emitting body, 2 < / RTI > cavities. Accordingly, mutual interference between the first light emitting diode chip and the second light emitting diode chip can be reduced, thereby reducing optical loss.

The light-emitting element for preventing sleep disturbance described above can be used as an illumination or backlight light source according to various embodiments. In particular, the light emitting device may be a backlight source, thereby providing a display capable of realizing color without yellowing while preventing inhibition of melatonin secretion.

According to another aspect of the present invention, there is provided a backlight light emitting module for preventing sleep disturbance, comprising: a first light emitting diode chip having a first peak wavelength within a range of 410 to 435 nm; And a second light emitting diode chip having a second peak wavelength within a range of 440 to 470 nm, wherein the first light emitting diode chip and the second light emitting diode chip are independently drivable. Accordingly, it is possible to provide a backlight light emitting module capable of independently preventing the sleeping by driving the first light emitting diode chip and the second light emitting diode chip independently.

The first light emitting diode chip may have a first peak wavelength in a range of 420 to 430 nm. Accordingly, it is possible to reduce the relative value of the melatonin secretion inhibiting effect to 0.6 or less and to provide the blue light component that replaces the blue light emitted from the second LED chip.

The backlight unit may further include a first light emitting device and a second light emitting device, wherein the first light emitting diode chip is disposed in the first light emitting device, and the second light emitting diode chip is disposed in the second light emitting device Device. Accordingly, mutual interference between the first light emitting diode chip and the second light emitting diode chip can be reduced, thereby reducing optical loss.

According to another aspect of the present invention, there is provided a light emitting device driving system for preventing sleep disturbance, comprising: a first light emitting diode chip having a first peak wavelength within a range of 410 to 435 nm; And a second light emitting diode chip having a second peak wavelength within a range of 440 to 470 nm, wherein the first light emitting diode chip and the second light emitting diode chip are independently drivable. Accordingly, it is possible to provide a light emitting device driving system capable of independently preventing the sleeping by driving the first light emitting diode chip and the second light emitting diode chip independently.

The first light emitting diode chip may have a first peak wavelength in a range of 420 to 430 nm. Accordingly, it is possible to reduce the relative value of the melatonin secretion inhibiting effect to 0.6 or less and to provide the blue light component that replaces the blue light emitted from the second LED chip.

The light emitting device driving system for preventing sleep disorder further includes a first light emitting device and a second light emitting device, wherein the first light emitting diode chip is disposed in the first light emitting device, and the second light emitting diode chip is disposed in the second light emitting device Device.

Further, in the light-emitting element driving system for preventing sleep disorder, only the second light emitting element is driven in the daytime, or the first light emitting element and the second light emitting element are simultaneously driven, and only the first light emitting element can be driven at night. Accordingly, white light or various colors can be realized without inducing yellowing not only at daytime but also at night, and it is possible to reduce melatonin secretion inhibiting effect at night.

The light emitting device driving system may further include a timer for independently controlling a driving time of the first light emitting diode chip and the second light emitting diode chip. Accordingly, the first light emitting diode chip and the second light emitting diode chip can be driven simultaneously or individually in accordance with the set time, and the suppression of melatonin secretion can be reduced at a specific time.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided by way of example so that those skilled in the art can sufficiently convey the spirit of the present invention. Therefore, the present invention is not limited to the embodiments described below, but may be embodied in other forms. In the drawings, the width, length, thickness, etc. of components may be exaggerated for convenience. It is also to be understood that when an element is referred to as being "above" or "above" another element, But also includes the case where another component is interposed between the two. Like reference numerals designate like elements throughout the specification.

First, FIG. 1 is a graph showing the relative degree of melatonin suppression according to the wavelength of light.

Referring to FIG. 1, the melatonin secretion inhibition is the largest in the vicinity of 450 nm of the light wavelength, and the melatonin secretion inhibition is monotonously decreased gradually as the light wavelength is increased or decreased from 450 nm. That is, when a commonly used blue light emitting diode chip is used as a light emitting source, the effect of suppressing melatonin secretion is significant. On the other hand, it can be seen that the relative value of the melatonin secretion inhibiting effect is relatively small, i.e., 0.6 or less, in the purple light of about 425 nm. Embodiments of the present invention make use of the fact that the first light emitting diode chip having the first peak wavelength within the range of 410 to 435 nm can realize various colors by combining with the phosphors, while exploiting the difference in the melatonin release suppression effect according to the wavelength. Hereinafter, embodiments of the present invention will be described in more detail.

2 is a schematic cross-sectional view for explaining a light-emitting element for preventing sleeping disorder according to an embodiment of the present invention.

2, the light-emitting element for preventing sleep disorder includes a body 101, a first light-emitting diode chip 103, a second light-emitting diode chip 105, a sealing material 107, a green light-emitting body 109, (111).

The body part 101 may be made of a general plastic including a polymer or the like, acrylonitrile butadiene styrene (ABS), liquid crystalline polymer (LCP), polyamide (PA), polyphenylene sulfide (IPS), polycyclic phthalate (PCT) ), A silicone molding compound (SMC), a thermoplastic elastomer (TPE), or the like, or may be formed of metal or ceramic. However, the material forming the body 101 is not limited thereto. The body portion 101 also includes leads (not shown). The body portion 101 may have a cavity 113.

The structures of the first light emitting diode chip 103 and the second light emitting diode chip 105 may be various types such as a horizontal type, a vertical type, a flip chip type, and the like. For example, the first and second light emitting diode chips 103 and 105 may be flip chips including upper and lower surfaces and electrode pads (not shown) positioned on the lower surface. The first light emitting diode chip 103 and the second light emitting diode chip 105 include the electrode pads located on the lower surface so that the first and second light emitting diode chips 103 and 105 can be electrically connected to the body portion (Not shown). For example, the first light emitting diode chip 103 and the second light emitting diode chip 105 may be mounted in the mounting region of the body portion 101, for example, the cavity 113 through solder or a conductive paste.

In the present invention, the first light emitting diode chip 103 may emit light having a first peak wavelength located within a wavelength range of 410 to 435 nm. Furthermore, the first light emitting diode chip 103 may emit light having a first peak wavelength located within a wavelength range of 410 to 430 nm, more specifically 420 to 430 nm. 1, the purple light emitted from the first light emitting diode chip 103 has a relative value of the melatonin secretion suppressing effect within the upper wavelength range of 0.6 or less, and at the same time, the second light emitting diode chip 105 It can be used as a light source for providing a blue light component in place of the emitted blue light, thereby preventing yellowing of the light emitting element.

Similarly, the second light emitting diode chip 105 may emit light having a second peak wavelength located within a wavelength range of 440 to 470 nm. Referring to FIG. 1, the blue light emitted from the second LED chip 105 has a wavelength range of 440 to 470 nm, where the relative value of the melatonin secretion inhibiting effect is 0.95 or more.

The first and second light emitting diode chips 103 and 105 may be made of, for example, a GaN-based III-nitride compound semiconductor.

The encapsulant 107 may be formed of a material including at least one of silicone, epoxy, polymethyl methacrylate (PSMA), polyethylene (PE), and polystyrene (PS) The encapsulant 107 can be formed through a dispensing process using a mixture of the above-described materials and the green light emitting body 109 and the red light emitting bodies 111. [ Alternatively, the sealing material 107 may be formed using a separate mold, and then pressurized or heat-treated. The sealing material 107 can be formed in various shapes such as a convex lens shape, a flat plate shape (not shown), and a shape having a predetermined unevenness on the surface. Although the light emitting device according to the present invention discloses a sealing material 107 having a flat plate shape, the shape of the sealing material 107 is not limited thereto. The sealing material 107 may cover at least a part of the first light emitting diode chip 103 and the second light emitting diode chip 105.

The green light emitting body 109 is excited to emit green light and the red light emitting body 111 is excited to emit red light through the light emitted from the first light emitting diode chip 103 and the second light emitting diode chip 105. The peak wavelength of the green light emitted by the green light emitting body 109 may be located within the wavelength range of 515 nm and 555 nm. The peak wavelength of the red light emitted by the red light emitting body 111 may be located within the wavelength range of 620 nm and 660 nm. The green light emitting body 109 and the red light emitting body 111 may include at least one of a sulfide, a silicate, an Aluminite, a Fluoride, a nitride, and a Quantum Dot. .

The first light emitting diode chip 103 and the second light emitting diode chip 105 can be independently driven and thus the first and second light emitting diode chips 103 and 105 can be driven simultaneously And may be driven separately. For example, in the daytime, only the second light emitting diode chip 105 or the first and second light emitting diode chips 103 and 105 can be driven at the same time, and in order to reduce the melatonin secretion suppressing effect at night, 105 may be turned off and only the first light emitting diode chip 103 may be driven.

According to the embodiments of the present invention, by adopting the first light emitting diode chip 103 in the violet region and the second light emitting diode chip 105 in the blue region together, it is possible to solve the problem of yellowing while suppressing the melatonin secretion It is possible to provide a light emitting device for preventing sleep disorder.

3 is a schematic cross-sectional view illustrating a light-emitting device for preventing sleeping disorder according to another embodiment of the present invention. Hereinafter, the light emitting device of the present embodiment will be described, and the detailed description of the same configuration as that of the above-described embodiment will be omitted in order to avoid duplication.

3, the light emitting device for preventing sleep disorder includes a body 121, a first light emitting diode chip 123, a second light emitting diode chip 125, a sealing material 127, a first green light emitting body 129a, A second green light emitting body 129b, a first red light emitting body 131a, and a second red light emitting body 131b.

In this embodiment, the body portion 121 includes a first cavity 133 and a second cavity 135. [ The first cavity 133 and the second cavity 135 may be disposed apart from each other.

The first light emitting diode chip 123 is inserted into the first cavity 133 of the body part 121 and the second light emitting diode chip 125 is inserted into the second cavity 135 of the body part 121 with solder, Lt; / RTI >

The first green light emitting body 129a is excited to emit green light and the first red light emitting body 131a to emit red light through the light emitted from the first light emitting diode chip 123. [ Similarly, the second green light emitting body 129b may be excited to emit green light and the second red light emitting body 131b may be excited to emit red light through the light emitted from the second light emitting diode chip 125.

The first green light emitting body 129a and the first red light emitting body 131a may be selected from a phosphor having a high conversion efficiency with respect to the purple light emitted from the first LED chip 123, And the second red light emitting unit 131b may be selected as a light emitting unit having a high conversion efficiency with respect to the blue light emitted from the second light emitting diode chip 125. [

The first light emitting diode chip 123 of the purple region is disposed in the first cavity 133 and the second light emitting diode chip 125 in the blue region is disposed in the second cavity 135 It is possible to separately arrange the light emitters capable of converting the wavelength by the light emitted from each light emitting diode chip and to reduce mutual interference between the first light emitting diode chip and the second light emitting diode chip, The optical loss can be reduced.

4 is a schematic cross-sectional view illustrating a backlight light emitting module for preventing sleeping disorder according to an embodiment of the present invention.

Referring to FIG. 4, the back surface light emitting module for preventing sleep disturbance has a first light emitting device 122a and a second light emitting device 122b physically spaced from each other. The first light emitting diode chip 123 is disposed in the first cavity 133 of the first light emitting device 122a and the second light emitting diode chip 125 is disposed in the second cavity 135 of the second light emitting device 122b, Or a conductive paste or the like.

The first light emitting device 122a and the second light emitting device 122b may be mounted on the same printed circuit board or may be mounted on different printed circuit boards, respectively.

The light emitting mechanism of the first light emitting diode chip 123 and the second light emitting diode chip 125 is the same as the light emitting mechanism of the other embodiment.

According to embodiments of the present invention, the sleep-disorder prevention backlit light emitting module may include a first light emitting diode chip 123 in the purple region, a second light emitting diode chip 125 in the blue region, Emitting elements 122b can be separated from the second light emitting device 122b by the light emitted from each of the light emitting diode chips, 2 mutual interference between the light emitting diode chips can be reduced, so that the optical loss can be reduced.

5 is a schematic block diagram for explaining a driving system of a light emitting device for preventing sleeping disorder according to an embodiment of the present invention.

5, the light emitting device driving system 200 for preventing sleep disorder includes a control unit 205, a power supply unit 210, a light emitting unit 215, a first light emitting diode power supply unit 220, a first light emitting diode chip 225 A second light emitting diode power supply unit 230, a second light emitting diode chip 235, and a timer 240.

The control unit 205 controls the power supply unit 210 to drive the light emitting unit 215 according to the time set in the timer 240. The control unit 205 may drive the first light emitting diode power supply unit 220 and the second light emitting diode power supply unit 230 of the power supply unit 210 simultaneously or at different times.

The power supply unit 210 includes a first light emitting diode power supply unit 220 and a second light emitting diode power supply unit 230. The first light emitting diode power supply unit 220 and / And supplies power to the light emitting unit 215 through the power supply unit 230.

The light emitting unit 215 includes a first light emitting diode chip 225 and a second light emitting diode chip 235. The first light emitting diode chip 225 and the second light emitting diode chip 235 It emits light independently. The light emitting unit 215 may be a light emitting device or a backlight emitting module. For example, the first light emitting diode chip 225 and the second light emitting diode chip 235 may be disposed in one light emitting device, as described with reference to FIG. 2 or 3, Or may be disposed in different light emitting devices.

The timer 240 may be preset with a time. For example, the time for reducing the melatonin secretion inhibition may be set in the timer 240. The timer 205 transmits the set time to the control unit 205. [

Accordingly, it is possible to provide a light emitting device driving system for preventing sleeping disorder that simultaneously or individually drives the first light emitting diode chip and the second light emitting diode chip according to the set time.

Furthermore, the driving system of the light-emitting element for preventing sleep disturbance according to an embodiment of the present invention can be applied to a smart display such as a smart phone or a pad. In this case, the second light emitting diode power supply unit 230 and the first light emitting diode power supply unit 220 can be selectively driven through a smart display application capable of controlling the daylight function and the nightlight function. Alternatively, only the second light emitting diode power supply unit 230 may be driven during the day, or the first light emitting diode power supply unit 220 and the second light emitting diode power supply unit 230 may be simultaneously driven in synchronization with the own display in the smart display, Only the light emitting diode power supply unit 220 can be driven.

6 is a spectrum of light emitted from a light-emitting element for preventing sleeping disorder according to another embodiment of the present invention.

The spectrum 134 of the first white light realized from the first cavity 133 and the spectrum 136 of the second white light realized from the second cavity 135 are shown by solid lines and the transmission spectrum 137, The transmission spectrum 139 of the green filter and the transmission spectrum 141 of the red filter are shown by dotted lines.

6, the maximum peak wavelength of the spectrum 134 of the first white light realized from the first cavity 133 is 426 nm and the maximum peak wavelength of the spectrum 136 of the second white light implemented from the second cavity 135 is 426 nm. The peak wavelength is 450 nm, and the peak wavelengths of the transmission spectra 137, 139, and 141 of the color filter are within the range of the typical three-primary-color light.

7 is a spectrum obtained by transmitting light emitted from a light-emitting element for preventing sleep disturbance according to another embodiment of the present invention to a display color filter.

A spectrum 143a in which the first white light is transmitted through the blue filter, a spectrum 143b in which the first white light is transmitted through the green filter and a spectrum 143c in which the first white light is transmitted through the red filter are shown by solid lines, A spectrum 145b transmitted through a blue filter, a spectrum 145b transmitted through a second green filter, and a spectrum 145c transmitted through a red filter are shown by dotted lines.

Referring to FIG. 7, a spectrum 143b transmitting the first white light to the green filter, a spectrum 145b transmitting the second white light to the green filter, a spectrum 143c transmitting the first white light to the red filter, The spectrum 145c transmitted through the red filter is almost the same and only the peak wavelength of the spectrum 143a transmitting the first white light through the blue filter and the peak wavelength of the spectrum 145a transmitting the second white light through the blue filter 426nm and 450nm.

However, even if the peak wavelength of the spectrum 145a transmitted through the blue filter is different between 426 nm and 450 nm, the degree to which the first white light implements the display is similar to the degree that the second white light implements the display. Therefore, even if the first white light is used, since the color can be realized to the same degree as the second white light, the second white light can be sufficiently substituted while suppressing melatonin secretion suppression.

FIG. 8 is a graph showing the spectrum showing the relative magnitude of the melatonin secretion inhibiting effect and the spectrum of the light source according to the peak wavelength.

 8, a first light emitting diode chip having a peak wavelength of 426 nm, a green light emitting body, a red light emitting body emission spectrum 151, a chip having a peak wavelength of 430 nm and a green light emitting body, an emission spectrum 153 of a red light emitting body, The spectrum 155 of the second light emitting diode chip and the YAG fluorescent substance having the wavelength of 450 nm is shown by the solid line and the spectrum 157 showing the relative ratio of the melatonin secretion inhibiting effect is shown by the dotted line. Table 1 below shows the relative values of total amount of inhibition of melatonin secretion obtained by integrating the emission spectrum and the melatonin secretion inhibition effect by wavelength for each chip.

426 nm 430nm 450 nm Total amount of melatonin secretion inhibition 78% 81% 100%

Referring to Table 1, by using a first light emitting diode chip having a peak wavelength of 426 nm, a green light emitting body and a red light emitting body in place of the second light emitting diode chip having a peak wavelength of 450 nm and the YAG fluorescent substance, the melatonin secretion inhibiting effect is reduced by 22% do.

CIE _x CIE _y FLUX (lm) NTSC DCI 426 nm 0.262 0.237 70.7 81.0 84.3 430nm 0.262 0.238 64.1 85.8 89.3 452.5 nm 0.262 0.239 67.4 82.4 85.8

Referring to Table 2, even if the first light emitting diode chip having a peak wavelength of 426 nm, the green light emitting body, and the red light emitting body are used in place of the second light emitting diode chip having a peak wavelength of 450 nm and the YAG fluorescent substance, But the emission intensity is rather strong. Thus, it can be seen that it is possible to provide a light emitting device for preventing sleep disorder which can realize accurate color and has a small effect of suppressing melatonin secretion.

The present invention is not limited to the above-described various embodiments and features, and various modifications and changes may be made without departing from the technical idea of the present invention.

101 and 121:
103, 123: first light emitting diode
105, 125: second light emitting diode chip
107, 127: encapsulating material
109: green light emitter
111: Red phosphor
113: cavity
122a: a first light emitting element
122b: a second light emitting element
129a: first green light emitter
129b: second green light emitter
131a: first red phosphor
131b: second red phosphor
133: First cavity
134: spectrum of first white light
135: Second cavity
136: spectrum of the second white light
137: Transmission spectrum of blue filter
139: Transmission spectrum of green filter
141: Transmission spectrum of red filter
143a: a spectrum transmitted through the blue filter of the first white light
143b: a spectrum transmitted through the green filter of the first white light
143c: a spectrum transmitted through the red filter of the first white light
145a: a spectrum transmitted through the blue filter of the second white light
145b: a spectrum transmitted through the green filter of the second white light
145c: a spectrum transmitted through the red filter of the second white light
151: emission spectrum of a first light emitting diode chip having a peak wavelength of 426 nm, a green light emitting body, and a red light emitting body
153: emission spectrum of a chip having a peak wavelength of 430 nm, a green light emitting body, and a red light emitting body
155: spectrum of the second light emitting diode chip having the peak wavelength of 450 nm and the YAG fluorescent substance
157: Graph showing relative size of melatonin secretion inhibitory effect
200: Light-emitting element driving system for preventing sleeping disorder
205:
210:
215:
220: a first light emitting diode power source
225: first light emitting diode chip
230: a second light emitting diode power source
235: second light emitting diode chip
240: Timer

Claims (20)

A first light emitting diode chip having a first peak wavelength within a range of 410 to 435 nm; And
And a second light emitting diode chip having a second peak wavelength within a range of 440 to 470 nm,
Wherein the first light emitting diode chip and the second light emitting diode chip can be independently driven. The method according to claim 1,
Wherein the first light emitting diode chip has a first peak wavelength within a range of 420 to 430 nm. The method of claim 2,
Further comprising a green light emitter and a red light emitter,
The green light emitter emits green light by the light emitted from the first or second light emitting diode chip,
Wherein the red light emitting body emits red light by the light emitted from the first or second light emitting diode chip. The method of claim 3,
The green light-
A first green light emitter emitting green light by the light emitted from the first LED chip; And
And a second green light emitter for emitting green light by the light emitted from the second light emitting diode chip,
The red light-
A first red light emitting unit emitting red light by the light emitted from the first light emitting diode chip; And
And a second red light emitting unit emitting red light by the light emitted from the second light emitting diode chip. The method of claim 3,
Wherein the green light emitting body has a peak wavelength between 515 nm and 555 nm. The method of claim 3,
Wherein the red light emitting body has a peak wavelength between 620 nm and 660 nm. The method of claim 3,
The green light emitting body and the red light emitting body may include at least one of a sulfide, a silicate, an aluminum oxide, a fluoride, a nitride phosphor, and a quantum dot. Light emitting element. The method of claim 3,
Further comprising a body portion having a cavity,
Wherein the first light emitting diode chip, the second light emitting diode chip, the green light emitting body, and the red light emitting body are disposed in the cavity. The method of claim 8,
The body portion including a first cavity; And a second cavity,
The green light-
A first green light emitter emitting green light by the light emitted from the first LED chip; And
And a second green light emitter for emitting green light by the light emitted from the second light emitting diode chip,
The red light-
A first red light emitting unit emitting red light by the light emitted from the first light emitting diode chip; And
And a second red light emitting unit emitting red light by the light emitted from the second light emitting diode chip,
Wherein the first light emitting diode chip, the first green light emitting body, and the first red light emitting body are disposed in the first cavity,
And the second light emitting diode chip, the second green light emitting body, and the second red light emitting body are disposed in the second cavity. The method according to any one of claims 1 to 9,
Wherein the light emitting element is a backlight light source. A backlight light emitting module for preventing sleep disorder comprising the light emitting element for preventing sleeping disorder according to any one of claims 1 to 9. A first light emitting diode chip having a first peak wavelength within a range of 410 to 435 nm; And
And a second light emitting diode chip having a second peak wavelength within a range of 440 to 470 nm,
Wherein the first light emitting diode chip and the second light emitting diode chip are independently driven. The method of claim 12,
Wherein the first light emitting diode chip has a first peak wavelength within a range of 420 to 430 nm. 14. The method of claim 13,
The first light emitting device and the second light emitting device,
Wherein the first light emitting diode chip is disposed in the first light emitting device and the second light emitting diode chip is disposed in the second light emitting diode device. A first light emitting diode chip having a first peak wavelength within a range of 410 to 435 nm; And
And a second light emitting diode chip having a second peak wavelength within a range of 440 to 470 nm,
Wherein the first light emitting diode chip and the second light emitting diode chip can be independently driven. 16. The method of claim 15,
Wherein the first light emitting diode chip has a first peak wavelength within a range of 420 to 430 nm. 18. The method of claim 16,
Wherein only the second light emitting diode chip is driven during the day or the first light emitting diode chip and the second light emitting diode chip are simultaneously driven and only the first light emitting diode chip is driven at night. 18. The method of claim 16,
The first light emitting device and the second light emitting device,
Wherein the first light emitting diode chip is disposed in the first light emitting device and the second light emitting diode chip is disposed in the second light emitting device. 19. The method of claim 18,
Wherein the first light emitting element and the second light emitting element are driven simultaneously, and only the first light emitting element is driven at night. 18. The method of claim 16,
Further comprising a timer for independently controlling a driving time of the first light emitting diode chip and the second light emitting diode chip.

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