CN213459730U - LED light-emitting device - Google Patents
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- CN213459730U CN213459730U CN202022317588.7U CN202022317588U CN213459730U CN 213459730 U CN213459730 U CN 213459730U CN 202022317588 U CN202022317588 U CN 202022317588U CN 213459730 U CN213459730 U CN 213459730U
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Abstract
The application is applicable to the technical field of light-emitting devices, and provides an LED light-emitting device which comprises a substrate with a light source surface, a first light source group and a second light source group which are connected with the light source surface, and a decoding module connected with the substrate; the first light source group can output blue light with high color temperature, and the second light source group can output white light with medium color temperature; the decoding module is used for decoding the video or image signal or the picture signal into a row and column scanning signal and respectively controlling the brightness of the first light source group and the second light source group according to the row and column scanning signal. Simulating the dynamic color effect of blue sky and white cloud in clear sky by controlling the brightness time sequence change of the blue light of the first light source group and the white light of the second light source group; the first light source group and the second light source group have the characteristics of rich and continuous spectrum after light mixing, no obvious loss in a visible light range, high luminous efficiency, better color rendering property and higher saturation, and can better restore the real color of an article illuminated by the light-emitting device.
Description
Technical Field
The application relates to the technical field of light-emitting devices, in particular to an LED light-emitting device.
Background
With the continuous maturity and development of lighting technology, LED (Light Emitting Diode) Light sources are widely used in the fields of lighting, display and the like, and not only have the advantages of small volume, low heat productivity, energy saving and the like, but also can normally work in various working environments, and have a wide application range. The light emitting principle of the LED is that under the forward voltage of the diode, minority carriers and majority carriers are compounded to emit light, so that the LED light source is endowed with the characteristic of strong monochromaticity.
In the conventional scheme, in order to realize dynamic daylight illumination or simulate a dynamic color effect in clear sky, a scheme of mounting a display on a ceiling is often adopted. Because the RGB LEDs (red light chip LED, blue light chip LED, white light chip LED) used in the display are all packaged by single color LED chips, their own light emitting efficiency is low, and the light emitting spectra of the three LEDs are all narrow band spectra, and cannot constitute a continuous spectrum. Although the sky illumination effect can be dynamically fitted, the technical problems of poor spectral continuity, poor color rendering and low luminous efficiency exist, and the high-quality illumination effect cannot be realized.
SUMMERY OF THE UTILITY MODEL
An object of the application is to provide an LED light emitting device, which aims to solve the technical problem that the traditional light emitting device for simulating dynamic sky lighting effect has poor spectrum continuity.
The LED light-emitting device comprises a substrate with a light source surface, a first light source group connected with the light source surface, a second light source group connected with the light source surface, and a decoding module connected with the substrate; the first light source group can output blue light with a color temperature larger than or equal to 20000K, and the second light source group can output white light with a color temperature of 3800K-7800K; the decoding module is used for decoding a video or image signal into a row and column scanning signal and respectively controlling the brightness of the first light source group and the second light source group according to the row and column scanning signal.
In one embodiment of the present application, the LED lighting device further includes a third light source group connected to the light source surface, and the third light source group is capable of outputting yellow light with a color temperature of 1900K-3800K.
In one embodiment of the present application, the first light source group comprises N first light sources, the second light source group comprises N second light sources, and the third light source group comprises N third light sources; one of the first light sources, one of the second light sources, and one of the third light sources constitute one pixel display unit.
In one embodiment of the present application, the first light source group comprises N first light sources, the second light source group comprises 2N second light sources, and the third light source group comprises N third light sources; one of the first light sources, two of the second light sources, and one of the third light sources constitute one pixel display unit.
In one embodiment of the present application, the LED lighting device further includes a fourth light source group connected to the light source surface, and the fourth light source group is capable of outputting green light.
In one embodiment of the present application, the first light source group comprises N first light sources, the second light source group comprises N second light sources, the third light source group comprises N third light sources, and the fourth light source group comprises N fourth light sources; one of the first light sources, one of the second light sources, one of the third light sources, and one of the fourth light sources constitute one pixel display unit.
In one embodiment of the present application, the LED lighting device further includes a light-adjusting member disposed opposite to the light source surface, and the haze of the light-adjusting member is greater than or equal to 50%.
In one embodiment of the present application, the light transmittance of the light-adjusting member ranges from 48% to 96%.
In one embodiment of the present application, the first light source group employs continuous spectrum blue LEDs and the second light source group employs continuous spectrum white LEDs.
In one embodiment of the present application, the light source face is coated with a light absorbing layer.
The LED light-emitting device provided by any embodiment of the application has at least the following beneficial effects:
according to the LED light-emitting device provided by each embodiment of the application, a video or image signal is decoded into a row-column scanning signal through the decoding module, and the brightness time sequence change of the first light source group and the second light source group arranged on the light source surface of the substrate is controlled accordingly, so that the dynamic color effect of blue sky and white cloud in clear sky can be simulated; the first light source group is used for blue light illumination of high color temperature, the second light source group is used for white light illumination of medium color temperature, the light of the first light source group and the light of the second light source group are mixed to be rich and continuous in spectrum, the characteristic of no obvious deficiency exists in a visible light range, the light emitting efficiency is high, the better color rendering property and the higher light saturation are achieved, and the real color of an article illuminated by the LED light emitting device can be better restored.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an LED lighting device according to a first embodiment of the present application;
fig. 2 is a schematic structural diagram of an LED lighting device according to a second embodiment of the present application;
fig. 3 is a schematic structural diagram of an LED lighting device according to a third embodiment of the present application;
fig. 4 is a schematic structural diagram of an LED lighting device according to a fourth embodiment of the present application;
fig. 5 is a schematic structural diagram of an LED lighting device provided in a second embodiment of the present application from another viewing angle.
Reference numerals referred to in the above figures are detailed below:
1-a substrate; 11-a light source surface; 21-a first light source group; 22-a second light source group; 23-a third light source group; 24-a fourth light source group; 3-a decoding module; 4-light modulation member.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.
In order to explain the technical solutions of the present application, the following detailed descriptions are made with reference to specific drawings and examples.
Referring to fig. 1 to 3, an embodiment of the present application provides an LED lighting device, including a substrate 1 having a light source surface 11, a first light source group 21 connected to the light source surface 11, a second light source group 22 connected to the light source surface 11, and a decoding module 3 connected to the substrate 1; the first light source group 21 can output blue light with a color temperature greater than or equal to 20000K, and the second light source group 22 can output white light with a color temperature of 3800K-7800K; the decoding module 3 is used for decoding the video or image signal into a row and column scanning signal and controlling the brightness of the first light source group 21 and the second light source group 22 according to the row and column scanning signal.
In this embodiment, the first light source group 21 includes a plurality of first light sources, the second light source group 22 includes a plurality of second light sources, and one first light source and one second light source group 22 constitute one pixel display unit. The first light source group 21 can emit blue light with high color temperature, and is used for simulating the color effect of a blue sky in a clear sky; the second light source group 22 is capable of emitting white light rays of a medium color temperature for simulating the color effect of a white cloud in clear sky. The decoding module 3 decodes the video or image signal input to the LED lighting device into a row and column scanning signal according to a preset logic, and controls the brightness of the first light source group 21 and the second light source group 22 to change according to a time rule according to the row and column scanning signal, so as to simulate a dynamic color effect of a blue-sky white cloud in a clear sky on the LED lighting device. Moreover, the high color temperature blue light emitted from the first light source group 21 and the medium color temperature white light emitted from the second light source group 22 can simulate the daylight illumination effect.
The LED light-emitting device provided by the embodiment can at least achieve the following beneficial technical effects:
in the LED lighting device provided in this embodiment, the decoding module 3 decodes the video or image signal into a row-column scanning signal, and accordingly controls the timing sequence change of the brightness of the first light source and the second light source arranged on the light source surface 11 of the substrate 1, so as to simulate the dynamic color effect of the blue sky and the white cloud in the clear sky; the first light source group 21 is used for blue light illumination of high color temperature, the second light source group 22 is used for white light illumination of medium color temperature, light of the first light source group 21 and light of the second light source group 22 are mixed to be rich and continuous in spectrum, the characteristic of no obvious deficiency exists in a visible light range, the light emitting efficiency is high, the better color rendering property and the higher light saturation are achieved, and the real color of an article illuminated by the LED light emitting device can be better restored by the LED light emitting device.
In one embodiment of the present application, the first light source group 21 includes 2N first light sources, and the second light source group 22 includes N second light sources; two first light sources and one second light source constitute one pixel display unit. This has the advantage that it is ensured that the intensity of the blue light in the light emitted by the LED lighting device is sufficiently high to better simulate the dynamic effect of a blue sky cloudiness in a clear sky.
Referring to fig. 1 to 3, in an embodiment of the present application, the LED lighting device further includes a third light source group 23 connected to the light source surface 11, and the third light source group 23 is capable of outputting yellow light with a color temperature of 1900K-3800K.
More specifically, in the present embodiment, the first light source group 21 includes a plurality of first light sources, the second light source group 22 includes a plurality of second light sources, and the third light source group 23 includes a plurality of third light sources; the decoding module 3 decodes the video or image signal into a row-column scanning signal, and controls the brightness time sequence change of the first light source, the second light source and the third light source arranged on the light source surface 11 of the substrate 1 according to the row-column scanning signal, so that the dynamic color effect of blue sky and white cloud in clear sky can be simulated, and the dynamic color effect of sky in dusk time division can also be simulated.
The first light source group 21 is used for blue light illumination of high color temperature, the second light source group 22 is used for white light illumination of medium color temperature, the third light source group 23 is used for yellow light illumination of low color temperature, the first light source group 21, the second light source group 22 and the third light source group 23 all have continuous spectrum characteristics, the light energy utilization rate is high, the continuity of light emitting spectrums is better, better color rendering performance and higher light saturation are achieved, and the LED light-emitting device can better restore the real color of an article illuminated by the light-emitting device.
Referring to fig. 1 and fig. 2, in an embodiment of the present application, the first light source group 21 includes N first light sources, the second light source group 22 includes N second light sources, and the third light source group 23 includes N third light sources; a first light source, a second light source and a third light source constitute a pixel display unit.
For example, referring to fig. 2, as an alternative of this embodiment, the first light source, the second light source and the third light source are arranged on the light source surface 11 to form a plurality of light source bands parallel to each other, and the first light source, the second light source and the third light source on the same light source band are arranged alternately and equidistantly in a circulating manner; also, referring to fig. 1, the connecting lines among the first light source, the second light source and the third light source form an equilateral triangle, and the pixel display units are arranged vertically and horizontally and are laid on the light source surface 11.
Referring to fig. 3, in an embodiment of the present application, the first light source group 21 includes N first light sources, the second light source group 22 includes 2N second light sources, and the third light source group 23 includes N third light sources; a first light source, two second light sources and a third light source constitute a pixel display unit.
For example, as an alternative of this embodiment, the first light sources and the second light sources are alternately and equidistantly arranged on the light source surface 11 to form a plurality of first light source bands parallel to each other, the second light sources and the third light sources are alternately and equidistantly arranged on the light source surface 11 to form a plurality of second light source bands parallel to each other, and the first light source bands and the second light source bands are parallel, alternately and equidistantly arranged; or the second light sources form a plurality of mutually parallel first light source zones on the light source surface 11, the first light sources and the third light sources are alternately arranged at equal intervals on the light source surface 11 to form a plurality of mutually parallel second light source zones, the first light source zones and the second light source zones are alternately arranged at equal intervals, and the number of the light sources of the first light source zones is equal to that of the light sources of the second light source zones; it is also possible that a line connecting one first light source, two second light sources and one third light source forms a square, and the pixel display units are arranged in a vertical and horizontal direction and laid on the light source face 11.
In the embodiment, by setting the number ratio of the first light source, the second light source and the third light source to 1:2:1, the number of the light sources contained in each pixel display unit can be four, which is more beneficial to the arrangement and the planar dense paving of the pixel display units, and the arrangement of the control circuit on the substrate 1 is more convenient; meanwhile, the additional second light source can play a role in light supplement, so that the LED light-emitting device is higher in brightness and has a better illumination effect on the premise of not influencing the continuous spectral performance and color authenticity of illumination, and the visual effect of the color of an object under clear sunlight can be better restored.
Referring to fig. 4, in an embodiment of the present application, the LED lighting device further includes a fourth light source group 24 connected to the light source surface 11, and the fourth light source group 24 is capable of outputting green light.
More specifically, in the present embodiment, the first light source group 21 includes a plurality of first light sources, the second light source group 22 includes a plurality of second light sources, the third light source group 23 includes a plurality of third light sources, and the fourth light source group 24 includes a plurality of fourth light sources; the decoding module 3 decodes the video or image signal into a row-column scanning signal, and sequentially controls the brightness timing sequence change of the first light source, the second light source, the third light source and the fourth light source arranged on the light source surface 11 of the substrate 1, so that the dynamic color effect of blue sky, white cloud and green leaves in clear sky can be simulated, and the dynamic color effect of sky in dusk time division can also be simulated.
The first light source group 21 is used for blue light illumination of high color temperature, the second light source group 22 is used for white light illumination of medium color temperature, the third light source group 23 is used for yellow light illumination of low color temperature, the fourth light source group 24 is used for green light illumination, the first light source group 21, the second light source group 22 and the fourth light source group 24 all have continuous spectrum characteristics, the light energy utilization rate is high, the light emitting spectrum continuity is better, better color rendering property and higher light saturation are achieved, and the LED light-emitting device can better restore the real color of an article illuminated by the light-emitting device.
Referring to fig. 4, in an embodiment of the present application, the first light source group 21 includes N first light sources, the second light source group 22 includes N second light sources, the third light source group 23 includes N third light sources, and the fourth light source group 24 includes N fourth light sources; a first light source, a second light source, a third light source and a fourth light source group 24 constitute a pixel display unit.
For example, referring to fig. 4, as an alternative of this embodiment, the first light sources and the second light sources are alternately and equidistantly arranged on the light source surface 11 to form a plurality of first light source bands parallel to each other, the third light sources and the fourth light sources are alternately and equidistantly arranged on the light source surface 11 to form a plurality of second light source bands parallel to each other, and the first light source bands and the second light source bands are parallel, alternately and equidistantly arranged; it is also feasible that the connecting lines among the first light source, the second light source, the third light source and the fourth light source form a square, and the pixel display units are arranged in a vertical and horizontal manner and are laid on the light source surface 11.
In one embodiment of the present application, the first light source group 21 includes N first light sources, the second light source group 22 includes N second light sources, and the fourth light source group 24 includes N fourth light sources; a first light source, a second light source and a fourth light source group 24 constitute a pixel display unit.
In one embodiment of the present application, the first light source group 21 includes N first light sources, the second light source group 22 includes 2N second light sources, and the fourth light source group 24 includes N fourth light sources; one first light source, two second light sources and one fourth light source group 24 constitute one pixel display unit.
The two embodiments can also simulate the dynamic color effect of blue sky white clouds and green leaves in clear sky. The quantity ratios and the arrangement manners of the first light source, the second light source, and the fourth light source may refer to the quantity ratios and the arrangement manners of the first light source, the second light source, and the third light source in the previous embodiment, and the technical effects are similar to or the same as those in the previous embodiment, which is not described herein again.
Referring to fig. 5, in an embodiment of the present application, the LED lighting device further includes a light adjusting member 4 disposed opposite to the light source surface 11, and a haze of the light adjusting member 4 is greater than or equal to 50%. More specifically, the light adjusting member 4 may be a light adjusting film or a light adjusting plate having a predetermined haze and a predetermined transmittance; the haze of the light-adjusting member 4 ranges from 95% to 98%. In the embodiment, too high haze of the light adjusting member 4 may cause too low definition of the blue sky and white cloud image displayed by the LED lighting device, or even completely blurred, so that the LED lighting device can only achieve the lighting effect and lose its decoration; the excessively low haze of the light modulation member 4 can make each of the first light source, the second light source, the third light source and the fourth light source in the LED light emitting device easily observed by human eyes, thereby affecting the display effect of the LED light emitting device.
In one embodiment of the present application, the haze of the light adjusting member 4 is 95% or 98%.
In one embodiment of the present application, the light transmittance of the light adjusting member 4 ranges from 48% to 96%. In this embodiment, too low transmittance of the light-adjusting member 4 may cause too low definition of the blue sky and white cloud image displayed by the LED lighting device, or even completely blurred, so that the LED lighting device can only achieve the lighting effect and lose its decoration; the too high luminousness of light-adjusting part 4 makes each first light source, second light source, third light source and fourth light source among the LED illuminator easily be observed by human eyes direct observation, influences LED illuminator's display effect. As a specific aspect of the present embodiment, the light transmittance of the light adjusting member 4 is 67%.
In one embodiment of the present application, the light adjusting member 4 is disposed parallel to the light source surface 11, and the distance between the light adjusting member 4 and the light source surface 11 ranges from 4mm to 70 mm. In the embodiment, an excessively large distance between the light-adjusting member 4 and the light source surface 11 may result in an excessively large thickness of the LED light-emitting device, which is not favorable for the installation and use of the LED light-emitting device; the small distance between the light adjusting member 4 and the light source surface 11 can make each of the first light source, the second light source, the third light source and the fourth light source in the LED light emitting device easily observed by human eyes, which affects the display effect of the LED light emitting device. As a specific solution of this embodiment, the distance between the light adjusting member 4 and the light source surface 11 is 30 mm.
It should be understood that the haze and the light transmittance of the light modulation member 4 should depend on the sizes of the LED lamp beads adopted by the first light source, the second light source, the third light source and the fourth light source; when the first light source, the second light source, the third light source and the fourth light source adopt smaller LED lamp beads, the haze of the light adjusting part 4 can be properly reduced, and the light transmittance of the light adjusting part 4 is improved, so that the definition of the image of the blue sky and white cloud presented by the LED light emitting device is improved as much as possible on the premise that each LED lamp bead cannot be directly observed by human eyes, and the utilization rate of light energy is improved.
In one embodiment of the present application, the pixel display units are arranged on the light source surface 11 at intervals of less than or equal to 25mm, and the distance between the center points of the pixel display units is less than or equal to 40 mm.
In one embodiment of the present application, the first light source group 21 employs continuous spectrum blue LEDs, and the second light source group 22 employs continuous spectrum white LEDs. More specifically, the third light source group 23 employs continuous spectrum yellow LEDs, and the fourth light source group 24 employs continuous spectrum green LEDs. By adopting the continuous spectrum blue light LED, the continuous spectrum white light LED, the continuous spectrum yellow light LED and the continuous spectrum green light LED, the spectrum continuity of light emitted by the LED light-emitting device can be further improved, so that the LED light-emitting device has better color rendering and higher light saturation, and further can better restore the color of an article.
As a specific scheme of the embodiment, the first light source adopts a high color temperature blue LED with an X color coordinate range of 0.18-0.25 and a Y color coordinate range of 0.18-0.25, the second light source adopts a medium color temperature white LED with an X color coordinate range of 0.30-0.34 and a Y color coordinate range of 0.31-0.36, and the third light source adopts a low color temperature yellow LED with an X color coordinate range of 0.41-0.49 and a Y color coordinate range of 0.38-0.45. The advantage of this is that it is better able to restore the blue of the sky at noon, the white of the cloud under clear sky and the yellow of the sky at dusk, and thus it is possible to highly restore the dynamic color effect of the blue sky and white cloud in clear sky and the dynamic color effect of the sky at dusk.
As a specific solution of this embodiment, the powers of the single continuous spectrum blue LED, the continuous spectrum white LED, the continuous spectrum yellow LED and the continuous spectrum green LED are all less than or equal to 0.2 watt, and more specifically, the powers of the single continuous spectrum blue LED, the continuous spectrum white LED, the continuous spectrum yellow LED and the continuous spectrum green LED are all 0.06 watt. By properly reducing the luminous power of a single LED lamp bead, the spectrum of mixed light emitted by the LED light-emitting device is rich and continuous, no obvious loss exists in a visible light range, and the LED light-emitting device has better color rendering property and higher light saturation, so that the LED light-emitting device can better restore the real color of an article illuminated by the light-emitting device; meanwhile, the phenomenon that the LED light-emitting device is heated too fast due to high-power light emission is avoided, and the LED light-emitting device can stably work for a long time.
In one embodiment of the present application, the light source face 11 is coated with a light absorbing layer. In this embodiment, the light absorbing layer is coated and attached on the surface of the substrate 1, and the light absorbing layer is disposed to avoid the first light source group 21, the second light source group 22, the third light source group 23, and the fourth light source group 24 on the light source surface 11.
After irradiating the substrate 1, part of light emitted by the LED light-emitting device is reflected in the direction opposite to the light source surface 11 and observed by human eyes, and the light absorption layer is coated on the light source surface 11, so that the influence of the color of the substrate 1 on the light-emitting effect of the LED light-emitting device can be avoided.
As a specific aspect of this embodiment, the light source surface 11 is coated with a black light absorbing layer. After the LED light emitting device is used for a long time, due to reasons such as heating, oxidation, and absorption of electromagnetic waves with specific wavelengths, the light absorbing layer paint is often discolored, which affects the light emitting effect of the LED light emitting device; by coating the black light absorption layer on the light source surface 11, the color change of the light absorption layer after the LED light-emitting device is used for a long time can be greatly reduced, and the influence of the color change of the light absorption layer on the light-emitting effect of the LED light-emitting device is reduced.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. An LED light-emitting device is characterized by comprising a substrate with a light source surface, a first light source group connected with the light source surface, a second light source group connected with the light source surface, and a decoding module connected with the substrate; the first light source group can output blue light with a color temperature larger than or equal to 20000K, and the second light source group can output white light with a color temperature of 3800K-7800K; the decoding module is used for decoding a video or image signal into a row and column scanning signal and respectively controlling the brightness of the first light source group and the second light source group according to the row and column scanning signal.
2. The LED luminescent device of claim 1, further comprising a third light source group coupled to the light source face, the third light source group capable of outputting yellow light having a color temperature of 1900K-3800K.
3. The LED luminescent apparatus of claim 2, wherein the first light source bank comprises N first light sources, the second light source bank comprises N second light sources, and the third light source bank comprises N third light sources; one of the first light sources, one of the second light sources, and one of the third light sources constitute one pixel display unit.
4. The LED luminescent apparatus of claim 2, wherein the first light source bank comprises N first light sources, the second light source bank comprises 2N second light sources, and the third light source bank comprises N third light sources; one of the first light sources, two of the second light sources, and one of the third light sources constitute one pixel display unit.
5. The LED luminescent device of claim 2, further comprising a fourth light source group coupled to the light source face, the fourth light source group capable of outputting green light.
6. The LED lighting apparatus of claim 5 wherein the first light source bank comprises N first light sources, the second light source bank comprises N second light sources, the third light source bank comprises N third light sources, and the fourth light source bank comprises N fourth light sources; one of the first light sources, one of the second light sources, one of the third light sources, and one of the fourth light sources constitute one pixel display unit.
7. The LED lighting device according to any one of claims 1 to 6, further comprising a light adjusting member disposed opposite the light source face, wherein the light adjusting member has a haze of 50% or more.
8. The LED luminescent device of claim 7, wherein the light transmittance of the light conditioner is in the range of 48% to 96%.
9. The LED lighting device of any one of claims 1-6 wherein the first light source bank is continuous spectrum blue LEDs and the second light source bank is continuous spectrum white LEDs.
10. The LED lighting device as defined in any one of claims 1-6, wherein said light source face is coated with a light absorbing layer.
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| CN112216685A (en) * | 2020-10-16 | 2021-01-12 | 深圳市一窗科技有限责任公司 | LED light-emitting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112216685A (en) * | 2020-10-16 | 2021-01-12 | 深圳市一窗科技有限责任公司 | LED light-emitting device |
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