EP3583826A1 - Led lamp consisting of light emitting diodes (led) with circadian adjustable mode of radiated light providing for its health safety - Google Patents
Led lamp consisting of light emitting diodes (led) with circadian adjustable mode of radiated light providing for its health safetyInfo
- Publication number
- EP3583826A1 EP3583826A1 EP18722195.7A EP18722195A EP3583826A1 EP 3583826 A1 EP3583826 A1 EP 3583826A1 EP 18722195 A EP18722195 A EP 18722195A EP 3583826 A1 EP3583826 A1 EP 3583826A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- led
- light
- chain
- led lamp
- chains
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/20—Controlling the colour of the light
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/40—Details of LED load circuits
- H05B45/44—Details of LED load circuits with an active control inside an LED matrix
- H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/175—Controlling the light source by remote control
- H05B47/185—Controlling the light source by remote control via power line carrier transmission
Definitions
- LED lamp consisting of light emitting diodes (LED) with circadian adjustable mode of radiated light providing for its health safety
- LED lamps with variable selection of light level and possible elimination of blue wavelengths according to modes to day and night.
- the first bulbs' filaments were formed by charred bamboo strings or threads giving light equal to fire light, i.e. red monochromatic light without the blue wavelength.
- tungsten began to be used as the most suitable material and it's still used to date.
- Light emitted by a tungsten source already contains the blue wavelength.
- LED sources are the latest ones which use a blue LED to emit light in the shorter wavelength spectrum or create the white light using RGB chips, i.e. by mixing three basic colors.
- LED TV sets, mobile phones, tablets etc. appeared progressively in the market. They emit blue light in the eyes all day, even after the sunset.
- Narrow-band amber LED extends the orange-yellow wavelengths with the green one and they are not so safe. So called PC amber LED covers all the green wavelength range.
- the LED activity principle is based on radiating energy in form of photons while electric current is passing through a semiconductor junction formed by semiconductor material, typically GaN or InGaN. Overview of application of semiconductors in current colour LEDs:
- GaAs gallium arsenide
- AlGaAs aluminium gallium arsenide
- AlGaAs aluminium gallium arsenide Red - 610 ⁇ ⁇ ⁇ 760 nm
- aluminium gallium arsenide (AlGaAs) gallium arsenide phosphide
- GaAsP gallium arsenide phosphide
- AlGalnP aluminium gallium indium phosphide
- GaP gallium phosphide
- GaAsP gallium arsenide phosphide
- AlGalnP aluminium gallium indium phosphide
- GaP gallium phosphide
- AlGalnP aluminium gallium indium phosphide
- GaP gallium phosphide
- AlGa aluminium gallium
- AlGa aluminium gallium
- A1P aluminium phosphide
- LEDs Any LED emits colour spectrum according to the applied semiconductor. LEDs, however, cannot emit white light because white light is a mixture of all colours. Photoluminescence is used to produce white light. Luminescence occurs when an atom is excited through action of other radiation, electrons and the like, and then the atom returns in its ground state and a photon is emitted. The substances where the luminescence occurs are called luminophores. LEDs are fitted with a thin layer of luminophore embedded in a silicone mixture, it is favourable to use a mixture of several different luminophores according to the required resulting colour spectrum.
- Chromaticity temperature is given in kelvins and it represents the colour rendering of light. The more kelvins a Led has, the more the artificial light resembles day sun light. Classic bulbs have this value around 3000 K, white cold LED has about 5000 K which is close to day bright light. Chromaticity temperature of household lamps should differ according to their application (higher chromaticity temperature in kitchen than in bedroom).
- CRI colour rendering index
- the ideal value is 100 which corresponds to the day sunlight, most frequently used LED lamps have CRI about 80.
- White light without using luminophores is used through a so called RGB LED where blue, green and red chips are switched together.
- melatonin The key function of melatonin in a man is regulation of the circadian regime of an organism. Melatonin is therefore primarily a chrono-biotic substance (Illnerova, H. 2008). If we spend a day in a cyclic manner, we have the day divided, without always realising this precisely, into a subjective day and a subjective night. When our subjective night is approaching, we begin to feel sleepy. Hormone melatonin starts to create in epiphysis situated in brain and it starts to discharge in blood.
- throughoutMelatonin expands vessels in our limbs, our warm escapes in environment and body temperature drops. Generation of melatonin drops or stops completely early in the morning and temperature rises.
- a quite new lamp has been developed that concentrates on harmonisation of circadian rhythms of men and animals, thus of all beings affected by the modern way of life concerning light pollution. It has shifted the effect required of light to conform to the day rhythm of a man, thus of circadian rhythms on a day and, on the other hand, it has suppressed undesirable imbalance of these rhythms at night when we need to see and to make light.
- LED lighting consists of two, at least, extreme light sources, namely for the day mode and for the night mode.
- the night lighting mode is provided just with the red and amber light with parameters like a fire has, and the day mode is provided with blue LEDs covered with luminophores with parameters similar to sunlight on a bright day.
- the night lighting mode emits monochromatic red and amber light with wavelength about 580 to 680 nm only.
- the night mode light emitted from a LED chip monochromatic with maximum at 590 nm for amber light and maximum at 628 nm for red light.
- the unusual direct red and amber light without any excitation in blue wavelengths has been used in the night mode to be completely sure that light radiation from these LED chips contains no blue and green light which would imbalance an organism and wake it from the night mode.
- the LED light in the night mode for easy short-term use, for example when one awakes and needs to go to the bathroom or for all the night when nursing a baby without the user being harmed by feeling of sleeplessness, even in the short term.
- a LED lamp is connected in such a way that the first switch always starts the night mode under the manual control. So a sleepy user need not solve what and how to switch at night without risking being exposed to the daylight by mistake. The day lighting mode would only occur within further switching. Amber light is satisfactory for safe not-waking lighting but addition of red light would cause a more pleasant feeling.
- the day lighting mode is provided by blue LED chips covered with luminophores emitting continuous band spectrum of visible light with wavelength 380 nm to 700 nm and chromaticity temperature CCT 3500 to 4200 K, it is favourable to have the CRI 90 value or more which provides for high fidelity of colour rendering and the light spectrum is similar to that of a bright day. Under such lighting an organism is more excited and a brain is stimulated to higher cognitive performance. The difference against common bulbs is similar to light on a rainy or a sunny day when a man is a bit more alert than in rain.
- a LED lamp consists of light emitting diodes (LED) with circadian regulable mode of radiated light providing for its health safety because is contains two, at least, switchable chains of LED chips.
- I. chain for the night mode and III. chain for the day mode and the I. chain contains one, at least, LED chip emitting amber light in range of wavelength 580 nm to 610 nm and one, at least, LED chip emitting red light in range of wavelength 610 nm to 700 nm
- III. chain contains one, at least, LED chip covered with luminophore emitting continuous band spectrum of visible light of wavelength 440 nm to 700 nm and chromaticity temperature CCT 3800 to 4200 K. It is favourable, if the emitted visible spectrum of the III. chain consists of relative share of 25 to 33% of blue colour, 22 to 35% of green colour and 38 to 45% of red colour.
- a LED lamp also contains an evening lighting mode which emits continuous band spectrum of visible light with wavelength 380 nm to 750 nm and chromaticity temperature CCT 2500 to 2800 K and it is favourable if its colour rendering index CRI has value of 80, at least.
- the evening lighting mode serves for preparation for sleep and for relaxation, the emitted light contains low share of blue colour and it is similar to day light 45 minutes before sunset.
- the evening lighting mode js provided either with a II. chain of LED chips which contains one, at least, blue LED chip covered with luminophore with chromaticity temperature of CCT 2500 to 2800 K or it is mixed through switching the I. and the III. chain together with the possibility to apply variable intensity of each chain and continuous or gradual transition into the night lighting mode and lighting of only the I. chain. It is favourable if the gradual or continuous transition between the lighting modes is provided by insertion of a dimmer between the chains.
- the evening lighting mode emits visible spectrum consisting of relative share of 7 to 19%) of blue colour, 27 to 31% of green colour and 50 to 65% of red colour.
- the spectral maxima of light intensity according to light wavelength were used to determine the ratios among the represented spectrum colours as follows: blue spectrum colour - maximum at 455 nm, green colour - maximum at 555 nm and red colour - maximum at 628 nm.
- a LED chip consists of compound semiconductors.
- a characteristic semiconductor applicable for a blue LED is :
- Indium gallium nitride InGaN which is used for shorter wavelengths, i.e. for the light connected to daily activities and we consider this alloy to be fully unwanted for the relaxation/sleep mode.
- Gallium is a necessary element for application in band about 580 nm and higher. Other elements can be added to modify the band emitted.
- AlGalnP Aluminium gallium indium phosphide
- Gallium arsenide is a typical material for pure red light on the edge of the visible spectrum, thus being quite safe even for the night sleep mode.
- Blue LEDs are coated with luminophores. It is favourable to use luminophores with commercial name ZYP630G3, emitting maximum light at wavelength of 628 nm and ZYP555G3, emitting maximum light at wavelength of 555 nm that have been dispersed in a silicone bed that was applied over the blue LED.
- the bed for the LED can be of various shape, it is favourable to have a wall of the LED bed inclined by 20° against level.
- the II. chain (evening mode) has been designed in such a way that the outgoing light which passes from a LED through luminophore consists of 30% blue, 20% green and 50% red colour of the light spectrum.
- the III. chain (night mode) of lighting has been designed in such a way that the outgoing light which passes from a LED through luminophore consists of 50% blue, 20% green and 30% red colour of the light spectrum.
- the night mode completely eliminates light blue wavelength the action of which harm human organism at night. It is advisable to switch on this light everywhere after 9 p.m., and to use it till sunrise.
- the evening mode has blue wavelength and it is advisable to use it in the afternoon and for reading.
- the day mode represents the full day sunlight and it should only be used during a day from sunrise till dark, both home and in offices, and possibly in circumstances where vigilance and performance are required.
- the manual switching of chains is set so that after lights are switched off and on again, first the I. chain is switched on with monochromatic amber and red colours, thus no effect on circadian rhythm and sleep quality would occur after each wake and switching light on.
- the switching works in such a way that a filtering capacitor is charged to 5 V, and it starts discharging after the light is off or power supply is off. If voltage drops under 2 V, on the next light switching-on the I. chain with monochromatic amber and red colours switches on, this occurs after some 10 seconds. If the light is switched in shorter time, the capacitor is discharged to, say, only 4 V, the system will not switch automatically into the I. chain but into the next chain.
- Values of colour rendering index are for the II. and III. chains 80 or more, thus they almost correspond to the natural sunlight.
- a light source with switch into the "safe" light mode for an observer a) critical blue band - typically 440 - 470nm
- the proposed conception of a light source assumes that at least one of the operating modes will be quite free of energy in the critical blue band a) or attenuated by several orders of magnitude with respect to the major band c) or d). Switching or gradual transition to the safe mode for relaxation/sleep may happen in several manners:
- this concept assumes that the "safe mode" should be the first one in which the source begins to light after being enabled from the off state.
- the source In the time from dusk, which for example occurs in December around 4 p.m., till evening, the source operates in the Day Mode and it completely emits short wave photons, like the sun during a day in summer. Evening, the source switches automatically or manually into the Evening Mode where it emits markedly less short wave photons and more long wave ones which simulates a situation before sunset. Then, at 9 p.m., thus 90 minutes before the usual time for going to bed (when traffic drops), the DEN source switches into the Night Mode, where it emits light completely without short wavelengths and thus it does not disturb the circadian rhythms.
- Option 1 switching between channels is performed directly by switching off and on in a certain sequence, the circuit selecting between lighting modes with own supply assesses switch-off of line supply itself. When the time for switch-off is exceeded the timing circuit for switch between lighting modes is reset.
- Option 2 switching between channels is performed directly by switching off and on in a certain sequence, the circuit selecting between lighting modes assesses switch-off of line supply independently. When the time for switch-off is exceeded the timing circuit for switch between lighting modes is reset.
- Option 3 switching between channels is performed using a control circuit that uses external control signals for each channel. In this case, reset is not necessary under standard circumstances.
- Option 4 switching between channels is performed using a programmed control system pre-programmed for certain light scenes or a radio-communication module transmitting control orders from a superior system. In this case, reset is not necessary under standard circumstances.
- the electric circuit of a LED lamp consists of an input protection circuit consisting of Rl resistor providing for overcurrent protection, varistor VI providing for overvoltage protection, further there are a rectifier bridge with filter CI providing for supply of a current source consisting of circuit Ul, supplied through resistors R2 and R3 with filter C2 and resistor R5 and diode D2 connected to winding of transformer Tl together with parallel combination of resistors R6 and R7, further resistor R4 and C6 providing for circuit timing, output winding of transformer Tl is connected through diode D3 to filtration capacitor C3 and resistor R9 which forms operating voltage +VLED for the sections of LED lamps, and then filtration capacitor C4 is supplied through resistor R8 and C5 providing for right time constant for "Option 1" with parallel Zener diode D4 setting operating voltage for control circuit U2 controlling shine of the relevant LED group
- An outside lamp is designed just of two chains.
- the I. chain switches on the light with chromaticity temperature 3800-4500 K first. It is advised to switch on this chain approximately from 4:30 p.m. to 8:00 p.m. in winter. Within this time range, people come from work, children from school and traffic is often heavy, and thus it is necessary to extend day light, particularly for safety. From 8.00 p.m. the traffic is not so heavy and people are home, ready to relax and prepare for bed. In this time the I. chain switches automatically into the III. chain which provides light with chromaticity temperature about 2500-2700 K. In summer when good visibility keeps even after 7.00 p.m., it is advisable to switch on the III. chain automatically in public lighting e.g. from 8.00 p.m.
- the source for outside lamp can be designed as follows:
- White chips with luminophore, red chips and amber chips can be inserted into a ceramic plate and it is favourable if ratio between amber and red chips is 4:5.
- Fig. 1 Comparison of representative light sources and their spectra according to the state of the art: a) low pressure sodium lamp, b) monochromatic LED with semiconductor AlInGaP with wavelength 590 nm to 595 nm, c) high pressure sodium lamp, d) PC amber, e) filtered warm white LED, f) cold white LED with chromaticity temperature of 4100 K, g) cold white LED with chromaticity temperature of 5100 K
- Fig. 2 Sensitivity to light wavelength: spectre of common white LED with colour temperature 4800K (above). The left curve in the lower figure shows sensitivity of melatonin and the middle curve shows sensitivity of human eye in standard day vision.
- Fig. 4 Commercial LED bulb 4034 K with low CRI value
- Fig. 5 I. chain of LED lamp : amber: red 4:5
- Fig. 10 Outside lamp - combination of I. and III. chain
- Fig. 11 Outside lamp spectrum - 1, chain, amber : red 3 :7
- Fig. 12 Schematic drawing of inside LED lamp with manual switch
- Fig. 13 Ceramic plate with chips for an outside lamp
- Fig. 14 Circuit diagram of LED lamp for DEN
- Fig. 15 Circuit diagram of I. and III. chain of outside lamp
- Fig. 20 Spectrum of luminophore with blue LED for 2700 K - II. chain, produced according to Example 2b).
- Fig. 21 Spectrum of luminophore with blue LED for 4000 K - III. chain, produced according to Example 3b.
- Fig. 22 Properties of light sources - state of the art
- Fig. 23 Time schedule of lighting of public space using LED lamps
- the luminophore originated from Na 2 C0 3 and Lu0 3 in a chemical reaction in H 2 S atmosphere.
- a mixture of oxides was placed in an alumina tray into an alumina tube and the mixture was slowly heated in an electric resistance furnace to temperature 1200°C under argon atmosphere. Then the mixture was annealed in H 2 S atmosphere for 80 minutes and then slowly cooled approximately by 1°C per minute. After room temperature was achieved, the resulting product was decanted in water and then in alcohol and then stored in argon atmosphere. The formed crystals were small plates 0.3 mm thin. The small plates were glued to a blue chip with InGaN composition. Finally, the chip covered with luminophore was coated with silicone binding agent.
- the mixture of oxides was ground in a ball grinder for 8 hours and then dried and sieved. Then the mixture of oxides was calcited in air at 600°C for 4 hours. Calcited powder was created, it was compacted to form a ceramic body with diameter 18 mm using uniaxial press with force 5 MPa and cold isostatic press with force 250 MPa. The body was sintered at 1700 °C for 20 hours in vacuum atmosphere.
- the generated luminophore had composition Y3AL 5 0i2:Ce and thickness 0.2 mm. This way prepared luminophore was glued to a blue LED chip of InGaN composition. Finally, the chip with luminophore was coated with silicone binding agent.
- a LED lamp manufactured according to Example 3a) can be switched into three chains using any switch.
- a switch on the lamp or a switch on a wall can be used.
- the light of the I. chain is on and the only active chips were amber and red ones and radiated monochromatic light had wavelength of 580 nm.
- Switch-over had activated the II. chain and the only active chips were those positioned in the middle ring with luminophore according to Example la), and blue light was emitted and a part of light was transformed by luminophore to yellow light. Mixing of these colours created warm white light with wavelengths in range 380-750 nm.
- the III. chain was activated and the only active chips were those positioned in the outer ring with luminophore according to Example 2a), and blue light was emitted and a part of light was transformed by luminophore to yellow light. Mixing of these colours created warm white light with wavelengths in range 380-680 nm. Switching-off and repeated switching-on after a period exceeding 10 s caused always activation of lights of the I. chain only with monochromatic amber and red LEDs.
- the bulb Having been switched, the bulb will light with monochromatic amber and red, suitable for night vision which does not disturb the circadian rhythms.
- the third stroke switches on day white colour that has the same parameters as mid-day sun.
- the day mode is suitable for work, it keeps a man alert.
- a LED lamp manufactured according to Example 3b) can be switched into three chains using any switch.
- a switch on the lamp or a switch on a wall can be used.
- the light of the I. chain is on, and the only active chips were red and amber ones and radiated monochromatic light had wavelength of 595 nm.
- Switchover had activated II. chain the only active chips were those positioned in the middle ring with luminophore according to Example lb), and blue light was emitted and a part of light was transformed by luminophore to yellow light. Mixing of these colours created warm white light with wavelengths in range 380-750 nm.
- the III. chain was activated and the only active chips were those positioned in the outer ring with luminophore according to Example 2b), and blue light was emitted and a part of light was transformed by luminophore to yellow light. Mixing of these colours created warm white light with wavelengths in range 380-680 nm.
- the bulb Having been switched, the bulb will light with monochromatic amber, suitable for night vision, which does not disturb the circadian rhythms.
- the second stroke switches on warm white colour simulating light 90 minutes before sunset
- the third stroke switches on day white colour that has the same parameters as mid-day sun.
- the day mode is suitable for work, it keeps a man alert.
- Blue chips with luminophores were prepared according to Example la).
- a LED lamp manufactured according to Example 6 can be switched into two modes automatically.
- the LED lamp is switched automatically or manually into three or two modes with CCT and spectral composition suitable for the corresponding part of the day:
- Mode Day white day light similar to sun during a day, with marked share of shortwave photons (supports cognitive performance of brain).
- the switch over is carried out through repeated stroke on the switch in interval less than 10 s.
- Automatically switched LED lighting is suitable for public lighting.
- the control system switches colour and/or chromaticity temperature CCT through detection of current loss.
- a big capacitor is used to keep the system in the previous state.
- the control system switches colour and/or chromaticity temperature CCT through detection of current loss.
- a big capacitor is used to keep the control circuit in the previous state. This practice can achieve shorter time in OFF state notwithstanding a change stored in the capacitor in an AC/DC converter.
- the control system switches colour and/or chromaticity temperature CCT using a control wire.
- the control wire switches colour LED and/or chromaticity temperature CCT directly without sequencing.
- the control circuit carries out filtering and transmits voltage from the control wire to a LED chain.
- the control system switches colour and/or chromaticity temperature CCT through request to PLC (Power-line) and/or a wireless communication module.
- PLC and/or a wireless communication module switches directly between a LED colour and/or chromaticity temperature CCT without sequencing.
- the source of supply voltage is connected through connection of the protective resistor (Rl) for overcurrent protection and the varistor (VI) for overvoltage protection to input of the block (1) of the constant current source with the isolation transformer consisting of the rectifying circuit (Dl), and its positive voltage output is connected with the positive electrode to the first filtration capacitor (CI) with the earthed negative electrode, and with the serial combination consisting of the resistors (R2, R3) and the second filtration capacitor (C2) earthed on its other end with its negative electrode where the common point of the third resistor (R3) and the positive electrode of the second capacitor (C2) of this serial combination is connected to input of supply to the current source (Ul) where the third input of the isolation transformer winding (Tl) together with the earthed serial combination of the sixth and seventh resistors (R6, R7) is connected through the fifth resistor (R5) and the second diode (D2) in direction cathode-anode, and where the fourth input of the isolation transformer (Tl) is earthed, and the earthed
- the source of supply voltage is connected through connection of the protective resistor (Rl) for overcurrent protection and the varistor (VI) for overvoltage protection to input of the block (1) of the constant current source with the isolation transformer consisting of the rectifying circuit (Dl), and its positive voltage output is connected with the positive electrode to the first filtration capacitor (CI) with the earthed negative electrode, and with the serial combination consisting of the resistors (R2, R3) and the second filtration capacitor (C2) earthed on its other end with its negative electrode where the common point of the third resistor (R3) and the positive electrode of the second capacitor (C2) of this serial combination is connected to input of supply to the current source (Ul) where the third input of the isolation transformer winding (Tl) is connected through the fifth resistor (R5) and the second diode (D2) in direction cathode-anode together with the earthed serial combination of the sixth and seventh resistors (R6, R7) where the fourth input of the isolation transformer (Tl) is earthed, and the earthed fourth resist
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CZ2017-90A CZ201790A3 (en) | 2017-02-15 | 2017-02-15 | A LED DEN source |
PCT/IB2018/050913 WO2018150342A1 (en) | 2017-02-15 | 2018-02-14 | Led lamp consisting of light emitting diodes (led) with circadian adjustable mode of radiated light providing for its health safety |
Publications (2)
Publication Number | Publication Date |
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EP3583826A1 true EP3583826A1 (en) | 2019-12-25 |
EP3583826B1 EP3583826B1 (en) | 2022-07-06 |
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Application Number | Title | Priority Date | Filing Date |
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EP18722195.7A Active EP3583826B1 (en) | 2017-02-15 | 2018-02-14 | Led lamp consisting of light emitting diodes (led) with circadian adjustable mode of radiated light providing for its health safety |
Country Status (4)
Country | Link |
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EP (1) | EP3583826B1 (en) |
CZ (1) | CZ201790A3 (en) |
DK (1) | DK3583826T3 (en) |
PL (1) | PL3583826T3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115119355A (en) * | 2022-08-29 | 2022-09-27 | 南昌硅基半导体科技有限公司 | High-speed LED device with positioning and lighting functions and manufacturing method thereof |
-
2017
- 2017-02-15 CZ CZ2017-90A patent/CZ201790A3/en unknown
-
2018
- 2018-02-14 DK DK18722195.7T patent/DK3583826T3/en active
- 2018-02-14 EP EP18722195.7A patent/EP3583826B1/en active Active
- 2018-02-14 PL PL18722195.7T patent/PL3583826T3/en unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115119355A (en) * | 2022-08-29 | 2022-09-27 | 南昌硅基半导体科技有限公司 | High-speed LED device with positioning and lighting functions and manufacturing method thereof |
CN115119355B (en) * | 2022-08-29 | 2022-12-27 | 南昌硅基半导体科技有限公司 | High-speed LED device with positioning and lighting functions and manufacturing method thereof |
Also Published As
Publication number | Publication date |
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PL3583826T3 (en) | 2022-11-14 |
CZ201790A3 (en) | 2018-09-19 |
DK3583826T3 (en) | 2022-10-10 |
EP3583826B1 (en) | 2022-07-06 |
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