Patent Grant
10784428
The present invention relates to lighting fields, and more particularly to an LED filament and an LED light bulb having the LED filament.
LEDs have the advantages of environmental protection, energy saving, high efficiency, and long lifespan. Therefore, it has been generally valued in recent years and gradually replaced the position of traditional lighting fixtures. However, the lighting of the traditional LEDs is directional, and unlike traditional lighting fixtures, which can make a wide-angle illumination. Therefore, applying LEDs to traditional lighting fixtures, depending on the types of the lighting fixtures, still has challenges.
In recent years, an LED filament that can make an LED light source resemble a traditional tungsten filament bulb and achieve 360° full-angle lighting has received increasing attention from the industry. This kind of LED filament is made by fixing a plurality of LED chips in series on a narrow and slender glass substrate, and then wrapping the entire glass substrate with silica gel doped with a phosphor or phosphors, and then forming electrical connection. In addition, there is one kind of LED soft filament, which is similar to the structure of the above-mentioned LED filament and is employed a flexible printed circuit substrate (hereinafter referred to FPC) instead of the glass substrate to enable the LED filament having a certain degree of bending. However, the soft filaments made by FPC have disadvantages. For example, since the FPC's thermal expansion coefficient is different from that of the silicone-covered filament, long-term use will cause the LED chip to displacement or even degumming; furthermore, the FPC may not beneficial to flexible adjustment of the process conditions and the like.
The applicant has previously disclosed a soft filament, for example, in some of the embodiments of Chinese Patent Publication No. CN106468405A, which provides a soft filament structure without a carrier substrate, and in the application, the traditional structure that needs the chip to be mounted on the substrate before coating phosphor or packaging is replaced by a flexible fluorescent package with a wavelength conversion effect. However, some of the filament structures have challenges related to the stability of metal wiring between the chips while they are being bent. If the arrangement of chips in the filament is dense, since the stress is too concentrated on a specific part of the filament upon the filament is in a bent configuration, when adjacent LED chips are connected by metal wiring, the metal wire connected to the LED chips would be damaged or even broken easily. Therefore, some embodiments in the application still have room for improvement in quality.
Most LED lights known to the inventor(s) use a combination of blue LED chips and yellow phosphors to emit white light, but the emission spectrum of LED lights in the red light region is weaker, and the color rendering index is lower. Therefore, it is difficult for the traditional LED lights to achieve a low color temperature. To increase the color rendering index, generally a certain amount of green phosphor and red phosphor is added; however, the relative conversion rate of red phosphor is lower, leading to a reduction in the overall luminous flux of the LED lights. That is, a decrease in light efficiency.
This application further optimizes the aforementioned applications to fit various kinds of processes and product requirements.
Furthermore, the LED filament is generally disposed inside the LED light bulb, and in order to present the aesthetic appearance and to make the illumination of the LED filament more uniform and widespread, the LED filament is bent to have a plurality of curves. However, since the LED chips are arranged in the LED filaments, and the LED chips are relatively harder objects, the LED filaments can hardly be bent into a desired shape. Moreover, the LED filament is also prone to have cracks due to stress concentration during bending.
It is noted that the present disclosure includes one or more inventive solutions currently claimed or not claimed, and in order to avoid confusion between the illustration of these embodiments in the specification, a number of possible inventive aspects herein may be collectively referred to “present/the invention.”
A number of embodiments are described herein with respect to “the invention.” However, the word “the invention” is used merely to describe certain embodiments disclosed in this specification, whether or not in the claims, is not a complete description of all possible embodiments. Some embodiments of various features or aspects described below as “the invention” may be combined in various ways to form an LED light bulb or a portion thereof.
It is an object of the claimed invention to provide an LED filament, including:
a conductive section, including a conductor;
at least two LED sections connected to each other by the conductive section, and each of the LED sections comprising at least two LED chips electrically connected to each other through a wire;
two electrodes electrically connected to the LED section; and
a light conversion layer with a top layer and a base layer covering the at least two LED sections, the conductive section and the two electrodes, and a part of each of the two electrodes is exposed respectively; wherein the LED filament is supplied with electric power no more than 8 W, when the LED filament is lit, at least 4 lm of white light is emitted per millimeter of filament length of the LED filament.
In accordance with an embodiment with the present invention, the top layer includes a phosphor composition that includes a first phosphor, a second phosphor, a third phosphor, and a fourth phosphor, where the weight percentage of each phosphor in the phosphor composition is as follow: the first phosphor is 5.45-5.55%, the second phosphor is 70-88%, the third phosphor is 0.6-7%, and the fourth phosphor is the rest amount of the phosphor.
In accordance with an embodiment with the present invention, the top layer includes a glue where a weight ratio of the phosphor composition to the glue in the top layer is from 0.2:1 to 0.3:1.
In accordance with an embodiment with the present invention, a peak wavelength of the first phosphor under an excitation of blue light is 490-500 nm, and an full width at half maximum (FWHM) is 29-32 nm; while a peak wavelength of the second phosphor under the excitation of blue light is 520-540 nm, and an FWHM is 110-115 nm.
In accordance with an embodiment with the present invention, each millimeter of filament length includes at least two LED chips, and in a 25° C. ambient environment, a temperature of the LED filament is no greater than a junction temperature after the LED filament is lit for 15,000 hours.
In accordance with an embodiment with the present invention, the LED filament includes a plurality of the LED sections, and each of the LED sections includes a plurality of the LED chips, a shortest distance between two LED chips of the LED chips located respectively in two adjacent LED sections is greater than a distance between two adjacent LED chips of the LED chips in the same LED section.
In accordance with an embodiment with the present invention, a length of the wire is shorter than a length of the conductor.
It is another object of the claimed invention to provide an LED light bulb, comprising:
a lamp housing, filled with gas including nitrogen and oxygen, where the oxygen content is 1% to 5% of the volume of the lamp housing;
a bulb base connected to the lamp housing;
a stem connected to the bulb base and located in the lamp housing; and
a single LED filament, disposed in the lamp housing and the LED filament comprising:
a conductive section, comprising a conductor;
at least two LED sections connected to each other by the conductive section, and each of the LED sections comprising at least two LED chips electrically connected to each other through a wire;
two electrodes, electrically connected to the LED section; and
a light conversion layer with a top layer and a base layer, covering the at least two LED sections, the conductive section and the two electrodes, and a part of each of the two electrodes is exposed respectively; wherein the LED filament is supplied with electric power no more than 8 W, when the LED filament is lit, at least 4 lm of white light is emitted per millimeter of filament length;
a Cartesian coordinate system having a x-axis, a y-axis and a-z-axis is oriented for the LED light bulb, where the z-axis is parallel to the stem, wherein R1 is the diameter of the bulb base, R2 is the maximum diameter of the lamp housing or the maximum horizontal distance between the lamp housing in the Y-Z plane, and R3 is the maximum width of the LED filament in the y-axis direction on the Y-Z plane or the maximum width in the x-axis direction on the X-Z plane, where R1<R3<R2.
In accordance with an embodiment with the present invention, the LED filament has at least two first bending points and at least one second bending point when the LED filament is bent. In accordance with an embodiment with the present invention, the at least two first bending points and the at least one second bending point are arranged alternately.
In accordance with an embodiment with the present invention, a height of any one of the at least two first bending points on the Z-axis is greater than a height of any one of the at least one second bending point.
In accordance with an embodiment with the present invention, the LED filament has a plurality of the first bending points, distances between any of two adjacent first bending points of the first bending points on the Y-axis are equal or distances between any of two adjacent first bending points of the first bending points on the Z-axis are equal.
In accordance with an embodiment with the present invention, the LED filament has a plurality of the first bending points, a distance between two adjacent first bending points of the first bending points on the Y-axis has a maximum value D1 and a minimum value D2, or a distance between two adjacent first bending points of the first bending points on the X-axis has the maximum value D1 and the minimum value D2, wherein the range of D2 is from 0.5 D1 to 0.9 D1.
In accordance with an embodiment with the present invention, the LED filament include one conductor section and two LED sections, where a bending point of each of the two LED sections and each of the two electrodes are located substantially on a circumference of a circle taking the conductor section as a center.
In accordance with an embodiment with the present invention, the LED filament includes a plurality of the LED sections, and each of the LED sections includes a plurality of the LED chips, a shortest distance between two LED chips of the LED chips located respectively in two adjacent LED sections is greater than a distance between two adjacent LED chips of the LED chips in the same LED section.
In accordance with an embodiment with the present invention, a length of the wire is shorter than a length of the conductor.
In accordance with an embodiment with the present invention, an impurity is attached to the inner wall of the lamp housing, where the average thickness of the impurity deposited per square centimeter of an inner wall area of the lamp housing is 0.01 to 2 mm.
In accordance with an embodiment with the present invention, a spectral distribution of the light bulb is between wavelength range of about 400 nm to 800 nm, and three peak wavelengths P1, P2, P3 are appeared in the wavelength ranges corresponding to light emitted by the light bulb, the wavelength of the peak P1 is between 430 nm and 480 nm, the wavelength of the peak P2 is between 580 nm and 620 nm, and the wavelength of the peak P3 is between 680 nm and 750 nm, wherein a light intensity of the peak P1 is less than that of the peak P2, and the light intensity of the peak P2 is less than that of the peak P3.
The disclosure will become more fully understood from the detailed description given herein below for illustration only, and thus not limitative of the disclosure, wherein:
In order to make the abovementioned objects, features, and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The phosphor composition that serves as a part of the top layer 420b includes a first phosphor, a second phosphor, a third phosphor, and a fourth phosphor. The peak wavelength of the first phosphor under the excitation of blue light is 490-500 nm, and the full width at half maximum (FWHM) is 29-32 nm. The peak wavelength of the second phosphor under the excitation of blue light is 520-540 nm, and the FWHM is 110-115 nm. The peak wavelength of the third phosphor under the blue light excitation is 660-672 nm, and the FWHM is 15-18 nm. The peak wavelength of the fourth phosphor under the excitation of blue light is 600-612 nm, and the FWHM is 72-75 nm; alternatively, the peak wavelength of the fourth phosphor under the excitation of blue light is 620-628 nm, and the FWHM is 16-18 nm; or, the peak wavelength of the fourth phosphor under the excitation of blue light is 640-650 nm, and the FWHM is 85-90 nm. The center particle diameter (D50) of any one of the group of the first phosphor, the second phosphor, the third phosphor, and the fourth phosphor ranges from 15 μm to 20 μm. Preferably, in one embodiment, the range of the D50 of the second phosphor and the third phosphor is from 15 to 16 μm, and the range of D50 of the first phosphor and the fourth phosphor is from 16 to 20 μm. When the blue light excites the phosphor, the different thickness of the top layer with consistent phosphor concentration will affect the full width at half maximum of the phosphor. In this embodiment, the thickness of the top layer 420b is 80-100 μm. The weight percentage of each phosphor in the phosphor composition is as follow: the first phosphor is 5.45-5.55%, the second phosphor is 70-88%, the third phosphor is 0.6-7%, and the fourth phosphor is the rest amount of the phosphor. The top layer is prepared at a certain ratio of phosphors to glue, phosphors with different peak wavelengths are selected, and the light performance is measured under the condition using a blue LED chip with a peak wavelength of 451 nm and a FWHM of 16.3 nm and utilizing a current of 30 mA. The results of light performance of different phosphor compositions are shown in Table 1 as below:
It can be known from top layers No. 1 to No. 4 in Table 1 that, the content of the third phosphor and the fourth phosphor in the phosphor composition will affect the light effect (Eff), the average color rendering index (Ra), and the saturated red color (R9). It can be known from compositions No. 1 and No. 2 that, when the content of the fourth phosphor with a peak wavelength of 670 nm increases, the Eff will increase, but Ra and R9 will decrease. As can be seen from No. 3 and No. 4 in Table 1, when the content of the fourth phosphor having a peak wavelength of 670 nm increases, the Eff will decrease, but Ra and R9 will increase. Therefore, when the fourth phosphor with different wavelength peaks is selected according to actual demands, the amounts of the third phosphor and the fourth phosphor may be adjusted to obtain better luminous performance.
Ratio Between Phosphors and Glue
Using the same phosphor, the ratio of the phosphor composition to the glue is adjusted and as shown in Table 2. As shown in Table 2, when the ratio of the phosphor composition to the glue is different, the Eff, the Ra, the R9, and the Correlated Color Temperature (CCT) will be different as well. When the ratio of the phosphor composition to the glue is more, the Eff, the Ra, and the CCT will decrease, and the R9 decreases first and then increases. Moreover, when utilizing the phosphor composition accompanied with a glue (such as silica gel) to form the top layer of the LED filament, since the specific weight of the phosphor composition is greater than that of the silica gel, apparent precipitation of the phosphor will occur during the manufacturing process of the top layer, causing the white LED color temperature to drift. The more ratio of the phosphor composition to the glue, the more produced precipitation of the phosphor, resulting in a more severe color temperature drift. Therefore, the weight ratio of the phosphor composition to the glue in the top layer is from 0.2:1 to 0.3:1, preferably, in one embodiment, from 0.25:1 to 0.3:1. In one embodiment, a certain amount of hollow glass microbeads can be added into the phosphor composition. When the phosphor precipitates, the glass microbeads will float, and during the floating process, the extent of backscattering/emission of light is reduced. Thus, the effect of light scattering resulting from the phosphor precipitation will be offset, and therefore the color temperature drift phenomenon can be alleviated. In addition, since the microbeads absorb less visible light, the addition of the glass microbeads has little impact on the initial brightness of white light LEDs. The mass ratio of the glass microbeads to the phosphor composition is 1:5 to 1:15, and in one embodiment the weight ratio of the glass microbeads to the phosphor composition is preferably 1:10 to 1:15.
In one embodiment, an LED filament is provided, and the provided LED filament is made of the aforementioned phosphor composition with a blue light chip. The blue light chip has a wavelength peak of 450 to 500 nm and a full width at half maximum of 15 to 18 nm.
Please refer to
During the manufacturing process of traditional bulbs, in order to avoid a tungsten wire burning in the air thereby causing the oxidative fracture failure, a glass structure with a horn shape (hereinafter refer to as “horn stem”) is designed to be disposed at the opening of the glass lamp housing and then the horn stem is sintered and sealed to the glass lamp housing. Then, a vacuum pump is connected to the lamp housing through the port of the horn stem to replace the air inside the lamp housing with nitrogen so as to suppress the combustion and oxidation of the tungsten wire inside the lamp housing. Eventually, the port of the horn stem will be sintered and sealed. Therefore, the vacuum pump can be applied to replace the air inside the lamp housing with full nitrogen or to configure a moderate ratio of nitrogen and helium inside the lamp housing through the stem to improve the thermal conductivity of the gas in the lamp housing and to remove the water mist in the air at the same time. In one embodiment, the gas inside the lamp housing can also be replaced with a moderate ratio of nitrogen and oxygen or a moderate ratio of nitrogen and air. The oxygen or air content is 1% to 10%, preferably 1% to 5% of the volume of the lamp housing. When the base layer contains saturated hydrocarbons, during the use of the LED bulbs, the saturated hydrocarbons will generate free radicals under the effect of light, heat, stress, etc. The generated free radicals or activated molecules will combine with oxygen to form peroxide radicals. Thus, the lamp housing filled with oxygen may increase thermal resistance and light resistance of the base layer having saturated hydrocarbons.
During the manufacturing process of the LED bulb, in order to increase the refractive index of the lamp housing 12 to the light emitted by the LED filament, some impurities, such as rosin, may be attached to the inner wall of the lamp housing 12. The average thickness of the impurity deposition per square centimeter of the inner wall area of the lamp housing 12 is 0.01 to 2 mm, and the thickness of the impurity is preferably 0.01 to 0.5 mm. In one embodiment, the content of the impurity per square centimeter of the inner wall area of the lamp housing 12 accounts for 1% to 30%, preferably 1% to 10% of the content of the impurity on the inner wall of the entire lamp housing 12. The content of the impurity can be adjusted, for example, by a method of vacuum drying to the lamp housing. In another embodiment, a part of impurities may be left in the gas of the lamp housing 12, and the content of impurities in the gas is 0.1% to 20%, preferably 0.1 to 5%, of the volume of the lamp housing 12. The impurity content may be adjusted by the method of vacuum drying to the lamp housing 12. Because a small amount of impurities is contained in the filling gas, the light emitted by the LED filament is scattered or refracted by the impurities, and thus the light emitting angle may be increased, which is beneficial to improving the light emitting effect of the LED filament.
A Cartesian coordinate system having an X-axis, a Y-axis and a Z-axis is oriented for the LED light bulb, where the Z-axis is parallel to the stem 19, and the LED filament 100 has at least two first bending point and at least one second bending points when the LED filament is bent. The at least two first bending point and the at least one second bending points are arranged alternately, and the height of any one of the at least two first bending point on the Z-axis is greater than that of any one of the at least one second bending points. In one embodiment, the distances between any of two adjacent first bending points on the Y-axis or on the Z-axis are equal. Therefore, the appearance of the LED filament can be neat and beautiful. In an embodiment, the distance between the two adjacent first bending points on the Y-axis or on X-axis has a maximum value D1 and a minimum value D2, where the range of D2 is from 0.5D1 to 0.9D1, and the light flux distribution on each plane is relatively consistent. Let (1) the diameter of the bulb base 16 be R1 (see
As shown in
Moreover, since a flexible substrate (preferably made of a silicone-modified polyimide resin composition) is adopted by the LED filament 100, the LED sections 102 and 104 also have a certain degree of bending ability. In this embodiment, the two LED sections 102 are respectively bent to form an inverted U shape, and the conductor section 130 is located between the two LED sections 102, and the degree of bending of the conductor section 130 is the same as or greater than that of the LED section 102. That is, the two LED sections 102 are respectively bent at the higher point of the LED filament 100 to form an inverted U shape and have a bent radius RE The conductor section 130 is bent at the lower point of the LED filament 100 and has a bent radius R2, where R1 is greater than R2. The arrangement of the conductor sections 130 enables the LED filament 100 to achieve a bending with a small turning radius in a limited space. In one embodiment, the bending points of the LED section 102 and that of the LED section 104 are at the same height in the Z direction. In addition, the height of the pole 19a corresponds to the height of the conductor section 130. For example, the lowest portion of the conductor section 130 may be connected to the top of the pole 19a, so that the overall shape of the LED filament 100 may not be easily deformed. In different embodiments, the conductor sections 130 may be connected to the pole 19a by passing through a hole on the top of the pole 19a, or the conductor sections 130 may be connected to the pole 19a by being glued on the top of the pole 19a, but is not limited thereto. In one embodiment, the conductor section 130 and the pole 19a may be connected by a conductive wire. For example, a conductive wire is extended from the top of the pole 19a and connected to the conductor section 130.
As shown in
Please refer to
Please refer to
The term “a filament” referred to in the present invention may be the aforementioned conductor section and the LED sections connected to each other, or may be formed by LED sections only. The LED sections may have the same and continuous light conversion layer (including the same and continuous top layer or bottom layer), and two conductive electrodes electrically connected to the conductive bracket of the light bulb are only provided at both ends. The structure that complies with the above description is the single LED filament structure mentioned in the present invention.
The invention has been described above in terms of the embodiments, and it should be understood by those skilled in the art that the present invention is not intended to limit the scope of the invention. It should be noted that variations and permutations (especially the embodiments that the LED filament provided in
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This application claims priority to Chinese Patent Applications No. 201910060475.2 filed on 2019 Jan. 22; No. 201911057715.X filed on 2019 Nov. 1; and No. 201911234236.0 filed on 2019 Dec. 5, which is hereby incorporated by reference in its entirety. This application is a continuation-in-part application of U.S. application Ser. No. 16/234,124 filed on 2018 Dec. 27, which is a continuation-in-part application of U.S. application Ser. No. 15/858,036 filed on 2017 Dec. 29. The application Ser. No. 15/858,036 is a continuation-in-part application of U.S. application Ser. No. 15/499,143 filed on 2017 Apr. 27. The application Ser. No. 15/858,036 is a continuation-in-part application of U.S. application Ser. No. 15/723,297 filed on 2017 Oct. 3. The application Ser. No. 15/858,036 is a continuation-in-part application of U.S. application Ser. No. 29/619,287 filed on 2017 Sep. 28. The application Ser. No. 15/858,036 is a continuation-in-part application of U.S. application Ser. No. 29/627,379 filed on 2017 Nov. 27. The application Ser. No. 16/234,124 claims priority to Chinese Patent Applications No. 201510502630.3 filed on 2015 Aug. 17; No. 201510966906.3 filed on 2015 Dec. 19; No. 201610041667.5 filed on 2016 Jan. 22; No. 201610272153.0 filed on 2016 Apr. 27; No. 201610394610.3 filed on 2016 Jun. 3; No. 201610586388.7 filed on 2016 Jul. 22; No. 201610544049.2 filed on 2016 Jul. 7; No. 201610936171.4 filed on 2016 Nov. 1; No. 201611108722.4 filed on 2016 Dec. 6; No. 201610281600.9 filed on 2016 Apr. 29; No. 201710024877.8 filed on 2017 Jan. 13; No. 201710079423.0 filed on 2017 Feb. 14; No. 201710138009.2 filed on 2017 Mar. 9; No. 201710180574.5 filed on 2017 Mar. 23; No. 201710234618.8 filed on 2017 Apr. 11; No. 201410510593.6 filed on 2014 Sep. 28; No. 201510053077.X filed on 2015 Feb. 2; No. 201510316656.9 filed on 2015 Jun. 10; No. 201510347410.8 filed on 2015 Jun. 19; No. 201510489363.0 filed on 2015 Aug. 7; No. 201510555889.4 filed on 2015 Sep. 2; No. 201710316641.1 filed on 2017 May 8; No. 201710839083.7 filed on 2017 Sep. 18; No. 201710883625.0 filed on 2017 Sep. 26; No. 201730450712.8 filed on 2017 Sep. 21; No. 201730453239.9 filed on 2017 Sep. 22; No. 201730453237.X filed on 2017 Sep. 22; No. 201730537542.7 filed on 2017 Nov. 3; No. 201730537544.6 filed on 2017 Nov. 3; No. 201730520672.X filed on 2017 Oct. 30; No. 201730517887.6 filed on 2017 Oct. 27; No. 201730489929.X filed on 2017 Oct. 16; No. 201711434993.3 filed on 2017 Dec. 26; No. 201711477767.3 filed on 2017 Dec. 29; No. 201810031786.1 filed on 2018 Jan. 12; No. 201810065369.9 filed on 2018 Jan. 23; No. 201810343825.1 filed on 2018 Apr. 17; No. 201810344630.9 filed on 2018 Apr. 17; No. 201810501350.4 filed on 2018 May 23; No. 201810498980.0 filed on 2018 May 23; No. 201810573314.9 filed on 2018 Jun. 6; No. 201810836433.9 filed on 2018 Jul. 26; No. 201810943054.X filed on 2018 Aug. 17; No. 201811005536.7 filed on 2018 Aug. 30; No. 201811005145.5 filed on 2018 Aug. 30; No. 201811079889.1 filed on 2018 Sep. 17; No. 201811277980.4 filed on 2018 Oct. 30; No. 201811285657.1 filed on 2018 Oct. 31; No. 201811378173.1 filed on 2018 Nov. 19; No. 201811378189.2 filed on 2018 Nov. 19; No. 201811549205.X filed on 2018 Dec. 18, each of which is hereby incorporated by reference in its entirety.
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| 201163628 | Dec 2008 | CN |
| 201448620 | May 2010 | CN |
| 101826588 | Sep 2010 | CN |
| 102121576 | Jul 2011 | CN |
| 102209625 | Oct 2011 | CN |
| 202209551 | May 2012 | CN |
| 202252991 | May 2012 | CN |
| 202253168 | May 2012 | CN |
| 102751274 | Oct 2012 | CN |
| 202473919 | Oct 2012 | CN |
| 202719450 | Feb 2013 | CN |
| 101968181 | Mar 2013 | CN |
| 102958984 | Mar 2013 | CN |
| 102969320 | Mar 2013 | CN |
| 202834823 | Mar 2013 | CN |
| 103123949 | May 2013 | CN |
| 203131524 | Aug 2013 | CN |
| 203367275 | Dec 2013 | CN |
| 203367375 | Dec 2013 | CN |
| 103560128 | Feb 2014 | CN |
| 103682042 | Mar 2014 | CN |
| 203477967 | Mar 2014 | CN |
| 103890481 | Jun 2014 | CN |
| 203628311 | Jun 2014 | CN |
| 203628391 | Jun 2014 | CN |
| 203628400 | Jun 2014 | CN |
| 203656627 | Jun 2014 | CN |
| 203671312 | Jun 2014 | CN |
| 103939758 | Jul 2014 | CN |
| 103956421 | Jul 2014 | CN |
| 103972364 | Aug 2014 | CN |
| 103994349 | Aug 2014 | CN |
| 203771136 | Aug 2014 | CN |
| 203857313 | Oct 2014 | CN |
| 203880468 | Oct 2014 | CN |
| 203907265 | Oct 2014 | CN |
| 203910792 | Oct 2014 | CN |
| 203932049 | Nov 2014 | CN |
| 204062539 | Dec 2014 | CN |
| 104295945 | Jan 2015 | CN |
| 104319345 | Jan 2015 | CN |
| 204083941 | Jan 2015 | CN |
| 204153513 | Feb 2015 | CN |
| 104456165 | Mar 2015 | CN |
| 204289439 | Apr 2015 | CN |
| 104600174 | May 2015 | CN |
| 104600181 | May 2015 | CN |
| 204328550 | May 2015 | CN |
| 104716247 | Jun 2015 | CN |
| 204387765 | Jun 2015 | CN |
| 204459844 | Jul 2015 | CN |
| 104913217 | Sep 2015 | CN |
| 104979455 | Oct 2015 | CN |
| 105042354 | Nov 2015 | CN |
| 105090789 | Nov 2015 | CN |
| 105098032 | Nov 2015 | CN |
| 105140381 | Dec 2015 | CN |
| 105161608 | Dec 2015 | CN |
| 204986570 | Jan 2016 | CN |
| 105371243 | Mar 2016 | CN |
| 205081145 | Mar 2016 | CN |
| 105609621 | May 2016 | CN |
| 106468405 | Mar 2017 | CN |
| 106898681 | Jun 2017 | CN |
| 107123641 | Sep 2017 | CN |
| 107170733 | Sep 2017 | CN |
| 206563190 | Oct 2017 | CN |
| 107314258 | Nov 2017 | CN |
| 206973307 | Feb 2018 | CN |
| 207034659 | Feb 2018 | CN |
| 108039402 | May 2018 | CN |
| 105090782 | Jul 2018 | CN |
| 207849021 | Sep 2018 | CN |
| 209354987 | Sep 2019 | CN |
| 2535640 | Dec 2012 | EP |
| 2760057 | Jul 2014 | EP |
| 2567145 | Apr 2016 | EP |
| 2547085 | Aug 2017 | GB |
| 3075689 | Feb 2001 | JP |
| 2001126510 | May 2001 | JP |
| 2003037239 | Feb 2003 | JP |
| 2006202500 | Aug 2006 | JP |
| 2013225587 | Oct 2013 | JP |
| 2012053134 | Apr 2012 | WO |
| 2014012346 | Jan 2014 | WO |
| 2014167458 | Oct 2014 | WO |
| 2017037010 | Mar 2017 | WO |
| Number | Date | Country | |
|---|---|---|---|
| 20200161522 A1 | May 2020 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 16234124 | Dec 2018 | US |
| Child | 16748070 | US | |
| Parent | 15858036 | Dec 2017 | US |
| Child | 16234124 | US | |
| Parent | 29627379 | Nov 2017 | US |
| Child | 15858036 | US | |
| Parent | 29619287 | Sep 2017 | US |
| Child | 29627379 | US | |
| Parent | 15723297 | Oct 2017 | US |
| Child | 29619287 | US | |
| Parent | 15168541 | May 2016 | US |
| Child | 15723297 | US | |
| Parent | 15308995 | US | |
| Child | 15168541 | US | |
| Parent | 15499143 | Apr 2017 | US |
| Child | 15308995 | US | |
| Parent | 15384311 | Dec 2016 | US |
| Child | 15499143 | US | |
| Parent | 15366535 | Dec 2016 | US |
| Child | 15384311 | US | |
| Parent | 15237983 | Aug 2016 | US |
| Child | 15366535 | US |
