CN111223979B - Luminaires and lamps for health lighting - Google Patents
Luminaires and lamps for health lighting Download PDFInfo
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Abstract
The invention belongs to the technical field of semiconductor lighting, and particularly relates to a light-emitting device and a lamp for health lighting. The light-emitting device for health illumination comprises a blue light chip and fluorescent powder excited by the blue light chip, wherein the blue light chip comprises a first LED chip with the peak wavelength of 450-; the first LED chip, the second LED chip and the third LED chip are connected in series. In the spectrum formed by the light-emitting device, the relative intensity of blue light is lower, the spectrum is more continuous, and the saturated red color is more abundant, so that the light-emitting device is very suitable for the application field of high-power health illumination.
Description
Technical Field
The invention belongs to the technical field of semiconductor lighting, and particularly relates to a light-emitting device and a lamp for health lighting.
Background
A Light Emitting Diode (LED) is a semiconductor Diode that converts electrical energy into Light energy. With the upgrading of LED applications, the market demand for LEDs is developing towards higher power and healthier light sources.
The full spectrum of the LED has the advantages of high color rendering index, sunlight-like property, high color reduction, color saturation, and the like, and thus has been widely paid attention to and studied in the industry. From the health illumination angle, short-wave blue light (450 nm) influencing vision and cyan light (480 nm) controlling melatonin secretion are key factors for realizing health illumination; in addition, long-wave red light (>660nm) helps to promote blood circulation, increasing saturation color richness. The current full-spectrum LED implementation scheme has the following problems: the nitrogen oxide fluorescent powder has poor quantum efficiency and stability, and is not suitable for being applied to a high-power LED; although some current technologies adopt multi-chip series-parallel combination, the cost is relatively high; in a full spectrum LED, the blue light intensity is still relatively high and the red part is not saturated enough.
Therefore, the prior art is in need of improvement.
Disclosure of Invention
The invention aims to provide a light-emitting device and a lamp for health illumination, and aims to solve the technical problems that the blue light intensity is high and the red light is unsaturated in the full spectrum of the conventional LED device.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a light-emitting device for health lighting, which comprises a blue light chip and fluorescent powder excited by the blue light chip, wherein the blue light chip comprises a first LED chip with the peak wavelength of 450-plus 460nm, a second LED chip with the peak wavelength of 460-plus 470nm and a third LED chip with the peak wavelength of 470-plus 480nm, and the fluorescent powder comprises aluminate green powder and nitride red powder; the first LED chip, the second LED chip and the third LED chip are connected in series.
In the light-emitting device for health illumination provided by the invention, the blue light chip comprises three LED chips with independent tube cores of different wave bands connected in series, the fluorescent powder comprises aluminate green powder and nitride red powder, and the aluminate green powder and the nitride red powder are excited by the group of blue light chips to emit light, so that the light-emitting device for health illumination with higher cost performance is formed.
In another aspect, the invention provides a lamp, which includes the light-emitting device of the invention.
The lamp provided by the invention comprises the special light-emitting device for health illumination, so that the relative intensity of blue light in an irradiated spectrum is lower, the spectrum is more continuous, and saturated red is more abundant, therefore, the lamp is a lamp for health illumination with higher cost performance and has a good application prospect in the field of high-power health illumination application.
Drawings
FIG. 1 is a spectrum diagram of a light emitting device according to an embodiment of the present invention;
FIG. 2 is a spectrum diagram of a light-emitting device of a comparative example of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the embodiments of the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features.
On one hand, the embodiment of the invention provides a light-emitting device for health lighting, which comprises a blue light chip and fluorescent powder excited by the blue light chip, wherein the blue light chip comprises a first LED chip with a peak wavelength of 450-; the first LED chip, the second LED chip and the third LED chip are connected in series.
In the light-emitting device for health illumination provided by the embodiment of the invention, the blue light chip comprises three LED chips with independent tube cores of different wave bands connected in series, the fluorescent powder comprises aluminate green powder and nitride red powder, and the aluminate green powder and the nitride red powder are excited by the group of blue light chips to emit light, so that the light-emitting device for health illumination with higher cost performance is formed.
Specifically, the working principle of the light-emitting device is as follows: firstly, the combination of blue light chips with various wave bands can make up the deficiency of the 460-480nm fluorescence spectrum, so that the spectrum formed by the embodiment of the invention is more continuous compared with the existing single-wave-band blue light excitation spectrum; secondly, the excitation wavelength of the fluorescent powder is continuous in a certain wavelength range, and the fluorescent powder is excited by a blue light chip with multiple wave bands together, so that the absorption effect of the fluorescent powder is better, and the intensity of the blue light can be obviously reduced; in addition, the light-emitting device provided by the embodiment of the invention adopts blue light chips with various wave bands to excite the combination of aluminate green powder and nitride red powder, so that the red light component of an LED spectrum is more full, and the richness of saturated red is increased. Finally, as shown in fig. 1, in the spectrum of the light-emitting device, the relative intensity of blue light at 450-460nm in the spectrum of the blue light chip excited phosphor is not higher than 0.7, and the color rendering index is greater than 95.
In one embodiment, the peak wavelength of the first LED chip is 455-. Further preferably, the peak wavelength of the first LED chip is 455-457.5nm, the peak wavelength of the second LED chip is 465-467.5nm, and the peak wavelength of the third LED chip is 475-477.5 nm. The optimized overall effect of the wave bands is that the color rendering index of the light-emitting device can be improved through the LED chips of the wave bands, and the three wave bands are combined and matched, so that the spectrum continuity is better; secondly, the wave band with the peak value of the third chip being 475-477.5nm can control the secretion of melatonin, thereby influencing life rhythm.
In one embodiment, the operating current densities of the first LED chip, the second LED chip and the third LED chip connected in series in the light emitting device are the same or have a difference within a range of ± 5%, and are the same as possible, and the current density with a deviation within a range of 5% can ensure the device stability of the LED chips under different current driving.
In one embodiment, the operating voltage of the first LED chip, the second LED chip and the third LED chip connected in series in the light-emitting device is 2.8-3.2V, which can be adapted to the conventional LED voltage range.
In one embodiment, the mass ratio of the aluminate green powder to the nitride red powder is (2-10): the aluminate green powder and the nitride red powder are in the proportion range, so that the color temperature of the light-emitting device is controllable and adjustable from 2700K to 6500K.
In one embodiment, the aluminate green powder is selected from Lu3Al5O12:Ce、Y3(Al,Ga)5O12:Ce、Sr2SiO4Eu and at least one of beta-SiAlON and Eu; the nitride red powder is selected from Sr2Si5N8:Eu、(Sr,Ca)AlSiN3Eu and CaAlSiN3At least one of Eu. The combination of the aluminate green powder and the nitride red powder is adopted, so that the external quantum efficiency and the stability of the fluorescent powder under the excitation of blue light are higher. Further preferably, the aluminate green powder is Lu3Al5O12Ce, the nitride red powder is (Sr, Ca) AlSiN3Eu, the combination of the two phosphors has relatively optimal stability and luminous efficiency.
In one embodiment, the luminescence wavelength of the aluminate green powder is located at 500-535nm, and the luminescence wavelength of the nitride red powder is located at 640-680 nm. By adopting the blue light chip provided by the embodiment of the invention and the fluorescent powder with the above light-emitting wavelength, the spectrum is more continuous, the color rendering index is high, and the natural light spectrum is more continuous. Further preferably, the luminescence wavelength of the aluminate green powder is located at 510-515nm, and the luminescence wavelength of the nitride red powder is located at 647-650nm and 670-680 nm. By adopting the fluorescent powder matching of the wave bands, the LED spectrum is closer to the natural light spectrum with the same color temperature, especially the red powder with the wave band of 670-680nm is adopted, so that the red light component of the LED spectrum is more full, the richness of saturated red is increased, the spectrum similarity is higher in the long-wave red light region, and the color rendering index is relatively higher.
On the other hand, the embodiment of the invention also provides a lamp, and the lamp comprises the light-emitting device provided by the embodiment of the invention.
The lamp provided by the embodiment of the invention comprises the special light-emitting device for health illumination, so that the relative intensity of blue light in an irradiated spectrum is lower, the spectrum is more continuous, and saturated red is richer, therefore, the lamp is a lamp for health illumination with higher cost performance, and has a good application prospect in the field of high-power health illumination application.
The invention is described in further detail with reference to a part of the test results, which are described in detail below with reference to specific examples.
Example 1
A light-emitting device comprises three LED chips with blue light wave bands, wherein the current density of the chips is equivalent, the voltage is 2.9-3.1V, the peak wave bands of the chips are respectively 455-460nm, 465-470nm and 475-480nm, and the adopted fluorescent powder comprises green fluorescent powder and red fluorescent powder. Wherein the green phosphor has a structural chemical formula of Lu3Al5O12Ce, emission wavelength is 512 nm; the red phosphor has a chemical structural formula of (Sr, Ca) AlSiN3Eu, emission wavelengths at 648nm and 675nm, respectively. The ratio of the green fluorescent powder to the red fluorescent powder is 7: 1. the spectrum of the light-emitting device is shown in fig. 1, and the relative intensity and spectral continuity of blue light are shown in table 1.
Example 2
A light-emitting device comprises three LED chips with blue light wave bands, wherein the current density of the chips is equivalent, the voltage is 2.9-3.1V, the peak wave bands of the chips are respectively 455-460nm, 465-470nm and 475-480nm, and the adopted fluorescent powder comprises green fluorescent powder and red fluorescent powder. The structural chemical formula of the green fluorescent powder is Y3(Al, Ga)5O12: Ce, and the emission wavelength is 512 nm; the red phosphor has a chemical structural formula of (Sr, Ca) AlSiN3Eu, emission wavelengths at 648nm and 675nm, respectively. The ratio of the green fluorescent powder to the red fluorescent powder is 7: 1. the relative intensity and spectral continuity of blue light of this light-emitting device are shown in table 1.
Example 3
A light-emitting device comprises three LED chips with blue light wave bands, wherein the current density of the chips is equivalent, the voltage is 2.9-3.1V, the peak wave bands of the chips are respectively 455-460nm, 465-470nm and 475-480nm, and the adopted fluorescent powder comprises green fluorescent powder and red fluorescent powder. Wherein the green phosphor powder has a structural chemical formula of Sr2SiO4Eu, emission wavelength is 512 nm; the red phosphor has a chemical structural formula of (Sr, Ca) AlSiN3Eu, emission wavelengths at 648nm and 675nm, respectively. The ratio of the green fluorescent powder to the red fluorescent powder is 7: 1. the blue light of the light-emitting device is opposite to that of the light-emitting deviceThe intensity and the spectrum continuity are shown in table 1.
Example 4
A light-emitting device comprises three LED chips with blue light wave bands, wherein the current density of the chips is equivalent, the voltage is 2.9-3.1V, the peak wave bands of the chips are respectively 455-460nm, 465-470nm and 475-480nm, and the adopted fluorescent powder comprises green fluorescent powder and red fluorescent powder. Wherein the green fluorescent powder has a structural chemical formula of beta-SiAlON: Eu, and the emission wavelength is 512 nm; the red phosphor has a chemical structural formula of (Sr, Ca) AlSiN3Eu, emission wavelengths at 648nm and 675nm, respectively. The ratio of the green fluorescent powder to the red fluorescent powder is 7: 1. the relative intensity and spectral continuity of blue light of this light-emitting device are shown in table 1.
Example 5
A light-emitting device comprises three LED chips with blue light bands, wherein the current density of the chips is equivalent, the voltage is 2.9-3.1V, the peak bands of the chips are respectively 450-455nm, 460-465nm and 475-480nm, and the adopted fluorescent powder comprises green fluorescent powder and red fluorescent powder. Wherein the green phosphor has a structural chemical formula of Lu3Al5O12Ce, emission wavelength is 512 nm; the red phosphor has a chemical structural formula of (Sr, Ca) AlSiN3Eu, emission wavelengths at 648nm and 675nm, respectively. The ratio of the green fluorescent powder to the red fluorescent powder is 7: 1. the relative intensity of blue light and the spectral continuity of the light-emitting device are shown in table 1.
Example 6
A light-emitting device comprises three LED chips with blue light wave bands, wherein the current density of the chips is equivalent, the voltage is 2.9-3.1V, the peak wave bands of the chips are respectively 450-455nm, 465-470nm and 475-480nm, and the adopted fluorescent powder comprises green fluorescent powder and red fluorescent powder. Wherein the green phosphor has a structural chemical formula of Lu3Al5O12Ce, emission wavelength is 512 nm; the red phosphor has a chemical structural formula of (Sr, Ca) AlSiN3Eu, emission wavelengths at 648nm and 675nm, respectively. The ratio of the green fluorescent powder to the red fluorescent powder is 7: 1. the relative intensity and spectral continuity of blue light of this light-emitting device are shown in table 1.
Example 7
Light emitting deviceThe device comprises three LED chips with blue light bands, wherein the current density of the chips is equivalent, the voltage is 2.9-3.1V, the peak bands of the chips are 455-460nm, 460-465nm and 475-480nm respectively, and the adopted fluorescent powder comprises green fluorescent powder and red fluorescent powder. Wherein the green phosphor has a structural chemical formula of Lu3Al5O12Ce, emission wavelength is 512 nm; the red phosphor has a chemical structural formula of (Sr, Ca) AlSiN3Eu, emission wavelengths at 648nm and 675nm, respectively. The ratio of the green fluorescent powder to the red fluorescent powder is 7: 1. the relative intensity and spectral continuity of blue light of this light-emitting device are shown in table 1.
Example 8
A light-emitting device comprises three LED chips with blue light wave bands, wherein the current density of the chips is equivalent, the voltage is 2.9-3.1V, the peak wave bands of the chips are respectively 455-460nm, 465-470nm and 470-475nm, and the adopted fluorescent powder comprises green fluorescent powder and red fluorescent powder. Wherein the green phosphor has a structural chemical formula of Lu3Al5O12Ce, emission wavelength is 512 nm; the red phosphor has a chemical structural formula of (Sr, Ca) AlSiN3Eu, emission wavelengths at 648nm and 675nm, respectively. The ratio of the green fluorescent powder to the red fluorescent powder is 7: 1. the relative intensity and spectral continuity of blue light of this light-emitting device are shown in table 1.
Example 9
A light-emitting device comprises three LED chips with blue light wave bands, wherein the current density of the chips is equivalent, the voltage is 2.9-3.1V, the peak wave bands of the chips are respectively 455-460nm, 465-470nm and 475-480nm, and the adopted fluorescent powder comprises green fluorescent powder and red fluorescent powder. Wherein the green phosphor has a structural chemical formula of Lu3Al5O12Ce, emission wavelength is 512 nm; the chemical formula of the red phosphor powder is Sr2Si5N8Eu, emission wavelengths at 648nm and 675nm, respectively. The ratio of the green fluorescent powder to the red fluorescent powder is 7: 1. the relative intensity and spectral continuity of blue light of this light-emitting device are shown in table 1.
Example 10
A light emitting device comprises three blue light band LED chips, wherein the current density of the chips is equivalent, and the voltage is 2.9-3.1V, the peak wave bands of the chip are 455-460nm, 465-470nm and 475-480nm respectively, and the adopted fluorescent powder comprises green fluorescent powder and red fluorescent powder. Wherein the green phosphor has a structural chemical formula of Lu3Al5O12Ce, emission wavelength is 512 nm; the chemical formula of the red phosphor powder is CaAlSiN3Eu, emission wavelengths at 648nm and 675nm, respectively. The ratio of the green fluorescent powder to the red fluorescent powder is 7: 1. the relative intensity and spectral continuity of blue light of this light-emitting device are shown in table 1.
Example 11
A light-emitting device comprises three LED chips with blue light wave bands, wherein the current density of the chips is equivalent, the voltage is 2.9-3.1V, the peak wave bands of the chips are respectively 455-460nm, 465-470nm and 475-480nm, and the adopted fluorescent powder comprises green fluorescent powder and red fluorescent powder. Wherein the green phosphor has a structural chemical formula of Lu3Al5O12Ce, emission wavelength is 512 nm; the red phosphor has a chemical structural formula of (Sr, Ca) AlSiN3Eu, emission wavelength is at 648 nm. The ratio of the green fluorescent powder to the red fluorescent powder is 7: 1. the relative intensity and spectral continuity of blue light of this light-emitting device are shown in table 1.
Example 12
A light-emitting device comprises three LED chips with blue light wave bands, wherein the current density of the chips is equivalent, the voltage is 2.9-3.1V, the peak wave bands of the chips are respectively 455-460nm, 465-470nm and 475-480nm, and the adopted fluorescent powder comprises green fluorescent powder and red fluorescent powder. Wherein the green phosphor has a structural chemical formula of Lu3Al5O12Ce, emission wavelength is 512 nm; the red phosphor has a chemical structural formula of (Sr, Ca) AlSiN3Eu, emission wavelength at 675 nm. The ratio of the green fluorescent powder to the red fluorescent powder is 7: 1. the relative intensity and spectral continuity of blue light of this light-emitting device are shown in table 1.
Example 13
A light-emitting device comprises three LED chips with blue light wave bands, wherein the current density of the chips is equivalent, the voltage is 2.9-3.1V, the peak wave bands of the chips are respectively 455-460nm, 465-470nm and 475-480nm, and the adopted fluorescent powder comprises green fluorescent powder and red fluorescent powder. It is composed ofThe structural chemical formula of the medium green phosphor is Lu3Al5O12Ce, emission wavelength is 512 nm; the red phosphor has a chemical structural formula of (Sr, Ca) AlSiN3Eu, emission wavelengths at 648nm and 675nm, respectively. The ratio of the green fluorescent powder to the red fluorescent powder is 2: 1. the relative intensity and spectral continuity of blue light of this light-emitting device are shown in table 1.
Example 14
A light-emitting device comprises three LED chips with blue light wave bands, wherein the current density of the chips is equivalent, the voltage is 2.9-3.1V, the peak wave bands of the chips are respectively 455-460nm, 465-470nm and 475-480nm, and the adopted fluorescent powder comprises green fluorescent powder and red fluorescent powder. Wherein the green phosphor has a structural chemical formula of Lu3Al5O12Ce, emission wavelength is 512 nm; the red phosphor has a chemical structural formula of (Sr, Ca) AlSiN3Eu, emission wavelengths at 648nm and 675nm, respectively. The ratio of the green fluorescent powder to the red fluorescent powder is 10: 1. the relative intensity and spectral continuity of blue light of this light-emitting device are shown in table 1.
Comparative example
A light-emitting device comprises a blue light waveband LED chip, the voltage is 2.9-3.1V, the peak waveband of the chip is 455-457.5nm, and the adopted fluorescent powder comprises green fluorescent powder and red fluorescent powder. Wherein the green phosphor has a structural chemical formula of Lu3Al5O12Ce, emission wavelength is 512 nm; the red phosphor has a chemical structural formula of (Sr, Ca) AlSiN3Eu, emission wavelengths at 648nm and 675nm, respectively. The ratio of the green fluorescent powder to the red fluorescent powder is 7: 1. the spectrum of the light-emitting device is shown in fig. 2, and the relative intensity and spectral continuity of blue light are shown in table 1.
Performance testing
The results of the performance test of the light emitting devices of the above examples and comparative examples are shown in table 1.
TABLE 1
Note: the spectrum continuity in table 1 is evaluated by poor, medium and good, and the light attenuation test conditions of the device are the aging 6000h test results under the conditions of 85 ℃ of temperature and 85% of humidity. The relative intensity of blue light referred to above is based on the blue light intensity of the comparative example at 5000K, and the blue light intensity of the other light sources is referred to herein.
From the data in table 1, it can be seen that: in the spectrum formed by the light-emitting device of the embodiment of the invention, the relative intensity of blue light is lower, the spectrum is more continuous, and the saturated red color is richer, so that the light-emitting device is very suitable for the application field of high-power healthy illumination.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A light-emitting device for health illumination comprises a blue light chip and fluorescent powder excited by the blue light chip, and is characterized in that the blue light chip comprises a first LED chip with the peak wavelength of 455-460nm, a second LED chip with the peak wavelength of 465-470nm and a third LED chip with the peak wavelength of 475-480nm, and the fluorescent powder comprises aluminate green powder and nitride red powder; the first LED chip, the second LED chip and the third LED chip are connected in series; the blue light chip excites the aluminate green powder and the nitride red powder to reduce the relative intensity of blue light and increase the richness of saturated red;
the working current densities of the first LED chip, the second LED chip and the third LED chip are the same or within a range of +/-5%, and the working voltages of the first LED chip, the second LED chip and the third LED chip are 2.8-3.2V; the mass ratio of the aluminate green powder to the nitride red powder is (2-10): 1.
2. health lighting as claimed in claim 1The luminescent device is characterized in that the aluminate green powder is selected from Lu3Al5O12:Ce、Y3(Al,Ga)5O12:Ce、Sr2SiO4Eu and at least one of beta-SiAlON and Eu; and/or the presence of a gas in the gas,
the nitride red powder is selected from Sr2Si5N8:Eu、(Sr,Ca)AlSiN3Eu and CaAlSiN3At least one of Eu.
3. The health lighting device as defined in claim 2, wherein said aluminate green powder is Lu3Al5O12Ce, the nitride red powder is (Sr, Ca) AlSiN3:Eu。
4. The light-emitting device for health illumination as defined in any one of claims 1-3, wherein the light-emitting wavelength of the aluminate green powder is located at 500-535nm, and the light-emitting wavelength of the nitride red powder is located at 640-680 nm.
5. The light-emitting device for health illumination as claimed in claim 4, wherein the wavelength of the aluminate green powder is at 510-515nm, and the wavelength of the nitride red powder is at 647-650nm and 670-680 nm.
6. A luminaire characterized in that it comprises a light-emitting device according to any one of claims 1-5.
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| CN201911227269.2A CN111223979B (en) | 2019-12-04 | 2019-12-04 | Luminaires and lamps for health lighting |
| PCT/CN2020/089161 WO2020228602A1 (en) | 2019-12-04 | 2020-05-08 | Light-emitting device for healthy lighting, and lamp |
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| CN201911227269.2A CN111223979B (en) | 2019-12-04 | 2019-12-04 | Luminaires and lamps for health lighting |
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| CN115377274B (en) * | 2022-09-14 | 2023-05-26 | 旭宇光电（深圳）股份有限公司 | Full spectrum LED light source and lamp |
| CN116230832A (en) * | 2023-02-27 | 2023-06-06 | 广州市巨宏光电有限公司 | Healthy lighting lamp |
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| US8143777B2 (en) * | 2007-08-23 | 2012-03-27 | Stanley Electric Co., Ltd. | LED lighting unit with LEDs and phosphor materials |
| CN102427075B (en) * | 2010-10-12 | 2013-08-21 | 友达光电股份有限公司 | Light emitting diode device and field sequence display |
| DE102012219460A1 (en) * | 2012-10-24 | 2014-04-24 | Osram Gmbh | LEDS MODULE |
| CN106449626A (en) * | 2016-12-13 | 2017-02-22 | 易美芯光（北京）科技有限公司 | Double-chip blue-light healthful LED light source |
| CN109119411A (en) * | 2018-09-04 | 2019-01-01 | 易美芯光（北京）科技有限公司 | A kind of LED light source of multi-wavelength chip portfolio excitation |
| CN110137164B (en) * | 2019-04-10 | 2021-05-28 | 厦门立达信照明有限公司 | A method and white light LED for realizing solar-like spectrum white light with low blue light hazard |
| CN209561408U (en) * | 2019-04-11 | 2019-10-29 | 中山市立体光电科技有限公司 | A kind of full-color LED packaging of microminiature |
| CN110504348A (en) * | 2019-08-23 | 2019-11-26 | 旭宇光电（深圳）股份有限公司 | Luminaires for white LED and health lighting |
| CN111081852A (en) * | 2019-12-31 | 2020-04-28 | 广州硅能照明有限公司 | Full-spectrum LED light source and LED lamp |
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Denomination of invention: Luminous devices and lamps for health lighting Effective date of registration: 20231007 Granted publication date: 20210416 Pledgee: Shenzhen high tech investment and financing Company limited by guarantee Pledgor: XUYU OPTOELECTRONICS (SHENZHEN) Co.,Ltd. Registration number: Y2023980060032 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20210416 Pledgee: Shenzhen high tech investment and financing Company limited by guarantee Pledgor: XUYU OPTOELECTRONICS (SHENZHEN) Co.,Ltd. Registration number: Y2023980060032 |