WO2018157428A1 - 色温可调的led灯丝、制备方法及led灯泡 - Google Patents

色温可调的led灯丝、制备方法及led灯泡 Download PDF

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Publication number
WO2018157428A1
WO2018157428A1 PCT/CN2017/078541 CN2017078541W WO2018157428A1 WO 2018157428 A1 WO2018157428 A1 WO 2018157428A1 CN 2017078541 W CN2017078541 W CN 2017078541W WO 2018157428 A1 WO2018157428 A1 WO 2018157428A1
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WIPO (PCT)
Prior art keywords
led
led light
module
light emitting
adjustable
Prior art date
Application number
PCT/CN2017/078541
Other languages
English (en)
French (fr)
Inventor
钟云
彭胜钦
汪涛
马骏
张传良
谢益尚
Original Assignee
四川鋈新能源科技有限公司
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Publication of WO2018157428A1 publication Critical patent/WO2018157428A1/zh

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/232—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S10/00—Lighting devices or systems producing a varying lighting effect
    • F21S10/02—Lighting devices or systems producing a varying lighting effect changing colors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/02—Cages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/06—Arrangement of electric circuit elements in or on lighting devices the elements being coupling devices, e.g. connectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2113/00—Combination of light sources
    • F21Y2113/10—Combination of light sources of different colours
    • F21Y2113/13—Combination of light sources of different colours comprising an assembly of point-like light sources

Definitions

  • the invention relates to the field of LED illumination, in particular to an LED filament with adjustable color temperature, a preparation method and an LED bulb.
  • the color temperature is the scale indicating the color of the light source, and the unit is K (Kelvin). Color temperature has important applications in photography, video, and publishing.
  • the color temperature of the light source is determined by comparing its color to the theoretical thermal blackbody radiator.
  • the Kelvin temperature of a hot black body radiator matching the color of the light source is the color temperature of that source, which is directly related to the Planck blackbody radiation law.
  • the office lighting fixtures currently used are mainly based on cool white. In the prior art, although the LED light bulb can be warmed and white light by adjusting the color temperature, the LED light can not be adjusted by the color temperature, so that the applicability of the LED lamp is not high, and the user cannot be given to the user. Bring a better experience.
  • the object of the present invention is to provide an LED filament with adjustable color temperature, a preparation method and an LED bulb, which can improve the applicability and enjoyment of the LED lamp and enhance the user experience.
  • an embodiment of the present invention provides an LED filament with adjustable color temperature
  • the LED filament with adjustable color temperature includes a substrate, a first LED illumination array, and a second LED illumination array, the first LED illumination array and the The second LED light emitting array is disposed on the substrate, the first LED light emitting array includes a plurality of connected first LED chips, and the second LED light emitting array includes a plurality of connected second LED chips,
  • the first LED light emitting array is coated with a first fluorescent colloid and a second fluorescent colloid, and the second LED emits light
  • the array is coated with the second fluorescent colloid, wherein the first fluorescent colloid is mixed with different proportions of the first phosphor, and the second fluorescent colloid is mixed with different proportions of the second phosphor, the first The LED lighting array and the second LED lighting array are both used to electrically connect an adjustable driving power source for connecting an external power source.
  • an embodiment of the present invention provides an LED filament with adjustable color temperature
  • the LED filament with adjustable color temperature includes a substrate and a plurality of LED illumination arrays, wherein the plurality of LED illumination arrays are disposed on the substrate.
  • the plurality of LED light-emitting arrays are coated with a fluorescent layer, wherein the fluorescent layers are mixed with different proportions of phosphors, and the plurality of LED light-emitting arrays are electrically connected with an adjustable driving power source.
  • an embodiment of the present invention provides an LED light bulb, which comprises a bulb, an exhaust pipe, a core column with a bracket, a spiral lamp head provided with an adjustable driving power source, and an LED filament with an adjustable color temperature.
  • the stem with the bracket is supported by the exhaust pipe for fixing the LED filament with adjustable color temperature, and the LED filament with adjustable color temperature is provided with metal terminals for electrically connecting with the adjustable driving power source.
  • the adjustable drive power source is for electrically connecting to the external power source.
  • an embodiment of the present invention provides a method for preparing an LED filament with adjustable color temperature, the method comprising:
  • the first LED light-emitting array is coated with a first fluorescent colloid, and the first fluorescent colloid is mixed with different proportions of the first phosphor;
  • the first LED light emitting array and the second LED light emitting array are electrically connected to an adjustable driving power source.
  • the embodiment of the invention provides an LED filament with adjustable color temperature, a preparation method and an LED bulb, which are respectively coated with different proportions of different fluorescent colloids by using the first LED illumination array and the second LED illumination array, and are driven by an adjustable
  • the power source adjusts the color temperature of the first LED light emitting array and the second LED light emitting array, that is, by adjusting the light emitting brightness of the first LED light emitting array and the second LED light emitting array, the color temperature adjustable LED filament can pass the first
  • the fluorescent colloid and the second fluorescent colloid exhibit a variety of different colors, thereby improving the applicability and viewing of the LED bulb and enhancing the user experience.
  • FIG. 1 is a schematic diagram of a first structure of an LED filament with adjustable color temperature according to an embodiment of the present invention
  • FIG. 2 is a second schematic structural diagram of an LED filament with adjustable color temperature according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of an LED light bulb according to an embodiment of the present invention.
  • FIG. 4 is a structural block diagram of an adjustable driving power supply according to an embodiment of the present invention.
  • FIG. 5 is a schematic circuit diagram of an adjustable driving power supply according to an embodiment of the present invention.
  • Icon 300-LED bulb; 302-bubble; 304-core column; 306-exhaust pipe; 308-spiral lamp head; 200-adjustable drive power supply; 210-voltage regulation module; 220-partial pressure filter module; Pulse control module; 240-first amplification module; 250-second amplification module; 260-first switch module; 270-second switch module; 280-oscillation frequency module; 290-voltage conversion module; 295-voltage regulator module; 100-color temperature adjustable LED filament; 101-conductive circuit layer; 102-substrate; 110-first LED light-emitting array; 112-first LED chip; 105-first fluorescent colloid; 120-second LED light-emitting array; a second LED chip; 107 - a second fluorescent colloid; 108 - a first metal terminal; 109 - a second metal terminal.
  • the terms “set”, “coupled”, “connected”, and “connected” are to be understood broadly, and may be a fixed connection, for example, unless otherwise specifically defined and defined. It can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be internal communication between the two elements.
  • the specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.
  • the embodiment of the invention provides an LED filament with adjustable color temperature
  • the LED filament with adjustable color temperature includes a substrate and a plurality of LED illumination arrays, the plurality of An LED light emitting array is disposed on the substrate, the plurality of LED light emitting arrays are coated with a fluorescent layer, wherein the fluorescent layer is mixed with different proportions of phosphors, and the plurality of LED light emitting arrays are electrically connected with an adjustable driving power source .
  • the substrate can be made of a rigid substrate material or a flexible substrate material, as long as it can be used to set the LED light-emitting array. This embodiment does not limit it.
  • the LED light emitting array disposed on the substrate may be two, three, four, etc., for example, the plurality of LED light emitting arrays may include a first LED light emitting array, a second LED light emitting array, and a third LED light emitting array. Wait.
  • the fluorescent layer coated on the LED light emitting array may be a fluorescent coating, a fluorescent colloid, or a flexible transparent fluorescent thin layer.
  • Different positions of the phosphor layer may be mixed with different proportions of different phosphors.
  • the position of the fluorescent layer covering the first LED light emitting array may be mixed to be 3: 4 red and yellow green phosphors
  • the fluorescent layer is coated on the second LED light emitting array
  • the position can be mixed with a 2:1 yellow and orange phosphor.
  • Different positions of the phosphor layer may also be mixed with different proportions of the same phosphor.
  • the phosphor layer is coated on the first LED light-emitting array, and the red and yellow-green phosphors may be mixed in a ratio of 3:4.
  • the red and yellow-green phosphors may be mixed at a position of 2:1 in a position overlapping the second LED light-emitting array. It should be understood that the phosphor coated with the fluorescent layer on the plurality of LED light-emitting arrays may also adopt a partial overlapping arrangement or the like, for example, the plurality of LED light-emitting arrays include the first LED light-emitting array, the second LED light-emitting array, and the third LED light-emitting.
  • the fluorescent layer may include a first fluorescent colloid, a second fluorescent colloid, and a third fluorescent colloid, wherein the first fluorescent colloid is mixed with different proportions of the first phosphor, and the second fluorescent colloid is mixed with different proportions of the second fluorescent a third fluorescent powder mixed with different proportions of the third fluorescent powder, wherein the first fluorescent colloid coats the first LED light emitting array and the substrate, and the second fluorescent colloid may cover the substrate, the first LED The illuminating array and the second LED illuminating array, the third fluorescent colloid may cover the third LED illuminating array.
  • the color temperature of each LED light-emitting array can be adjusted by the adjustable driving power source, so that the LED filament can display light of multiple colors.
  • FIG. 1 is a schematic diagram of a first structure of an LED filament 100 with adjustable color temperature according to an embodiment of the present invention.
  • the color temperature adjustable LED filament 100 includes a substrate 102, a first LED illumination array 110, and a first The two LED light emitting arrays 120, the first LED light emitting array 110 and the second LED light emitting array 120 are all disposed on the substrate 102.
  • the first LED light emitting array 110 includes a plurality of connected first LED chips 112, and the second LED light emitting array 120 includes a plurality of connected second LED chips 122.
  • the plurality of connected first LED chips 112 and the plurality of connected second LED chips 122 may be alternately arranged in the substrate 102 so that the color temperature adjustable LED filament 100 can be finer and more beautiful.
  • the color temperature adjustable LED filament 100 can be set to a diameter of 0.5 mm to 5 mm, such as 0.5 mm, 1 mm, 2.5 mm, 4 mm, or 5 mm, and the length can be greater than 15 mm.
  • the shape of the elongated strip can be
  • the flexible LED filament is beneficial to be bent into any shape, and is not affected by itself, thereby expanding the applicable range of the LED filament 100 with adjustable color temperature, and providing favorable conditions for diversification of the lamp source product.
  • the plurality of connected first LED chips 112 and the plurality of connected second LED chips 122 may also be symmetrically arranged on the substrate 102 or otherwise arranged.
  • the substrate 102 may be a transparent flexible substrate, or may be a flexible substrate with high color and high light transmittance, and the material thereof may be polyimide.
  • the advantage of the polyimide is that it has good mechanical properties and high resistance. Irradiation performance, dielectric properties, etc., of course, the substrate 102 can also be made of other flexible materials or rigid materials, the flexible substrate enables the color temperature adjustable LED filament 100 to be bent into any shape at any angle, bent at any angle The LED filament 100 whose color temperature is adjustable after any shape can also be normally illuminated, thereby improving the ornamental and aesthetic appearance of the LED lamp.
  • the substrate 102 can also be made of a hard material.
  • the color temperature adjustable LED filament 100 is a rigid LED filament, and the color temperature of the first LED illumination array 110 and the second LED illumination array 120 can be adjusted.
  • the rigid LED filament is rendered in a variety of colors.
  • the substrate 102 is made of a flexible material, and the LED filament 100 with adjustable color temperature is a flexible LED filament, and the flexible LED filament meets the needs of users.
  • a conductive circuit layer 101 may be disposed on the substrate 102, and the conductive circuit layer 101 is disposed to connect the plurality of first LED chips 112 and the plurality of second LED chips 122.
  • Positive and negative terminals wherein the negative terminal is connected to the negative electrode of the LED chip, and the positive terminal is connected to the positive electrode of the LED chip, and the first LED light emitting array 110 and the second LED light emitting array 120 are both fixed by the solder paste on the conductive On the circuit layer 101.
  • the conductive circuit layer 101 is used to connect a plurality of first LED chips 112 in series or in parallel, and the conductive circuit layer 101 is used to connect a plurality of second LED chips 122 in series or in parallel, the plurality of first The LED chip 112 and the plurality of second LED chips 122 may be alternately arranged in the conductive circuit layer 101, and the first LED light emitting array 110 and the second LED light emitting array 120 are electrically connected to the conductive circuit layer 101.
  • the first LED chip 112 and the plurality of connected second LED chips 122 can be connected to the external power source through the conductive circuit layer 101 to electrically emit light.
  • the plurality of connected first LED chips 112 may also be disposed on the conductive circuit layer 101 by a series, parallel or series-parallel combination, the plurality of connected second LEDs.
  • the chips 122 may also be disposed on the conductive wiring layer 101 by a series connection, a parallel connection, or a series-parallel connection.
  • FIG. 2 is a schematic diagram of a second structure of an LED filament 100 with adjustable color temperature according to an embodiment of the present invention.
  • the first LED illumination array 110 is coated with a first fluorescent colloid 105 and a second fluorescent
  • the second fluorescent light emitting array 120 is coated with the second fluorescent colloid 107, wherein the first fluorescent colloid 105 is mixed with different proportions of the first phosphor, and the second fluorescent colloid 107 is mixed with Different proportions of the second phosphor.
  • adjusting the color temperature of the first LED light-emitting array 110 to 3000K, adjusting the color temperature of the second LED light-emitting array 120 to 6000K may present one color, and adjusting the color temperature of the first LED light-emitting array 110 to 2000K, When the color temperature of the second LED light-emitting array 120 is increased to 5000K, another color can be presented.
  • the first fluorescent colloid 105 and the second fluorescent colloid 107 may be epoxy resin, silica gel or silicone gum containing different concentrations of phosphor.
  • the first fluorescent colloid 105 can cover the first LED light emitting array 110 and the substrate 102 360 degrees, and the second fluorescent colloid 107 can cover the substrate 102 by 360 degrees.
  • the first LED light emitting array 110 and the second LED light emitting array 120 are such that the color temperature adjustable LED filament 100 has high luminous efficiency.
  • the first fluorescent colloid 105 and the second fluorescent colloid 107 may also cover only one side or both sides of the substrate 102, that is, the first fluorescent colloid 105 and the first fluorescent colloid 105 are continuously coated on one side or both sides of the substrate 102.
  • the second fluorescent colloid 107 can select different coating methods of the fluorescent colloid according to actual needs during the specific manufacturing process, and further improve the applicable range of the LED filament 100 with the adjustable color temperature.
  • the color temperature of the first LED light emitting array 110 and the second LED light emitting array 120 can be adjusted by the adjustable driving power source 200. Therefore, the first LED light emitting array 110 and the second LED light emitting array 120 are both used.
  • the adjustable driving power source 200 is electrically connected, and the adjustable driving power source 200 is used to connect an external power source.
  • both ends of the first LED light emitting array 110 are disposed.
  • the first metal terminal 108 may be connected to both ends of the first LED light emitting array 110 by soldering or other means, and the second metal terminal 109 may also be soldered or otherwise connected to both ends of the second LED light emitting array 120. Connected.
  • the plurality of connected first LED chips 112 are chips of the same illuminating color or chips of different illuminating colors
  • the plurality of connected second LED chips 122 are chips of the same illuminating color or different illuminating.
  • a color chip for example, a plurality of connected first LED chips 112 and a plurality of connected second LED chips 122 are all the same blue, red or other monochromatic light chips, or the plurality of connected first LEDs
  • the chip 112 and some of the plurality of connected second LED chips 122 are the same blue light chip, and the other LED chips are the same red light chip, etc., to obtain mixed light of different colors, and different numbers are selected.
  • a variety of luminescent color LED chips can also obtain white light with a high color rendering index.
  • the color temperature adjustable LED filament 100 may further include a plurality of third LED light emitting arrays, each of the third LED light emitting arrays including a plurality of connected third LED chips, each of the third The LED light-emitting arrays are each coated with a third fluorescent colloid, and the third fluorescent colloid is mixed with different proportions of third phosphors, and the plurality of third LED light-emitting arrays are used to connect the adjustable driving power source 200.
  • the color temperature adjustable LED filament 100 can include a plurality of LED illumination arrays, and each LED illumination array is coated with a different fluorescent colloid mixed with different proportions of phosphors, thereby adjusting the color temperature of each LED illumination array.
  • the LED filament 100 with adjustable color temperature exhibits multiple colors through the fluorescent colloid to meet the viewing needs of people.
  • FIG. 3 is a schematic structural diagram of an LED bulb 300 according to an embodiment of the present invention.
  • the LED bulb 300 includes a bulb 302, an exhaust pipe 306, a stem 304 with a bracket, and an adjustable drive.
  • the bracketed stem 304 is supported by the exhaust pipe 306, and the bracketed stem 304 is used to fix the color temperature adjustable LED filament 100, and the color temperature adjustable LED filament 100 is disposed at both ends.
  • the color temperature adjustable LED filament 100 is made of a flexible substrate, and can be fixed to the stem 304 by various shapes such as a pentagonal star, a triangle, or the like by a wire.
  • the LED filament 100 can be arbitrarily set as needed, or the LED filament 100 with adjustable color temperature can be bent to any shape without being fixed by a wire.
  • the bulb 302 and the stem 304 are vacuum-sealed to form a vacuum sealed cavity filled with a high thermal conductivity and low viscosity gas, and the heat generated by the LED filament 100 with adjustable color temperature can be passed through the gas.
  • the heat conduction and convection are then dissipated through the bulb 302.
  • the gas may be a mixture of helium, hydrogen or helium hydrogen, and its gas pressure is about 50-1520 Torr at room temperature.
  • the bulb 302 may be a transparent or opalescent colored bulb 302, or a bulb 302 partially having a reflective layer or partially having a series of small prisms and lenslets.
  • the shape of the bulb 302 may be A-type, G-type, R-type, PAR-type, T-type or candle type, etc., or may be one of the shapes of the bulb 302 of other existing bulbs. . I won't go into too much detail here.
  • the adjustable driving power supply 200 is configured to adjust the color temperature of the first LED lighting array 110 and the second LED lighting array 120, so that the color temperature adjustable LED filament 100 exhibits multiple colors through the fluorescent glue. Light.
  • FIG. 4 is a structural block diagram of an adjustable driving power supply 200 according to an embodiment of the present invention.
  • the adjustable driving power supply 200 can include a voltage adjusting module 210, a voltage dividing filtering module 220, a pulse control module 230, a first amplifying module 240, a second amplifying module 250, a first switch module 260, and a second switch module 270.
  • the voltage regulation module 210 is coupled to the voltage division filter module 220
  • the voltage division filter module 220 is coupled to the pulse control module 230
  • the pulse control module 230 and the first amplification module 240 respectively
  • the second amplification module 250 is coupled to the first switching module 260
  • the second amplification module 250 is coupled to the second switching module 270.
  • the voltage adjustment module 210 is configured to adjust an input voltage magnitude, and output the adjusted input voltage to the voltage division filtering module 220.
  • the voltage dividing filter module 220 is configured to sequentially divide and voltage the voltage output by the voltage adjusting module 210 to the pulse control module 230.
  • the pulse control module 230 is configured to respectively output PWM (Pulse Width Modulation) signals with complementary duty cycles to the first amplification module 240 and the second amplification module according to the voltage output by the voltage division filter module 220. 250.
  • the first amplification module 240 is configured to amplify the received PWM signal The output is then output to the first switch module 260.
  • the first switch module 260 controls the brightness of the light emitted by the first LED light emitting array 110 connected thereto according to the duty ratio of the received PWM signal.
  • the second amplification module 250 is configured to amplify the received PWM signal and output the signal to the second switch module 270.
  • the second switch module 270 controls the luminance of the second LED light emitting array 120 connected thereto according to the duty ratio of the received PWM signal.
  • the voltage adjustment module 210 is mounted on an input interface, and the input interface is connected to an external power source for adjusting a potential on the input interface, so that the pulse control module 230 is output to the pulse control module 230 via the voltage division filter module 220.
  • the voltage changes.
  • the voltage adjustment module 210 can be implemented by a voltage regulator for adjusting an input voltage magnitude, and outputting the adjusted input voltage to the voltage dividing filter module 220, the specific The circuit is not particularly limited in order to achieve the above functions.
  • the voltage dividing filter module 220 is configured to divide and filter the input voltage, so that the voltage output to the pulse control module 230 meets the requirements.
  • the pulse control module 230 is configured to output a PWM signal corresponding to the duty ratio according to the magnitude of the input voltage.
  • the pulse control module 230 outputs two PWM signals with complementary duty cycles.
  • the duty cycle of the PWM signal is complementary, that is, the duty ratio of the two PWM signals is always 1.
  • the first amplification module 240 and the second amplification module 250 are both configured to amplify the received PWM signal, so that the PWM signal outputted to the first switch module 260 can drive the first switch module 260 and the output.
  • the PWM signal to the second switching module 270 can drive the second switching module 270.
  • the first switch module 260 is connected to the first LED lighting array 110, and is configured to control a change in its on-duty ratio according to a duty cycle change of the received PWM signal, thereby changing a light flow through the first LED.
  • the current of array 110 changes the brightness of the first LED illumination array 110.
  • the second switch module 270 is connected to the second LED lighting array 120, and is configured to control a change in its on-duty ratio according to a duty cycle change of the received PWM signal, thereby changing the flow through the first The current of the two LED light emitting arrays 120, thereby changing the brightness of the second LED light emitting array 120 Variety.
  • the duty cycle of the PWM signal output to the first switch module 260 is complementary to the duty cycle of the PWM signal output to the second switch module 270. Therefore, correspondingly, the current flowing through the first LED light emitting array 110 and the second LED light emitting array 120 is complementary to each other. It is assumed that the duty ratio of the PWM signal outputted to the first switching module 260 is 0.6, and the duty ratio of the PWM signal outputted to the second switching module 270 is 0.4. Correspondingly, the brightness of the first LED light emitting array 110 connected to the first switch module 260 is greater than the brightness of the second LED light emitting array 120 connected to the second switch module 270.
  • the duty ratios of the PWM signals output to the first switch module 260 and the second switch module 270 are changed correspondingly, so that the first LED light emitting array 110 and the The brightness of the second LED light-emitting array 120 is further used to adjust the color temperature.
  • the adjustable driving power supply 200 further includes an oscillating frequency module 280, the oscillating frequency module 280 is coupled to the pulse control module 230, and the oscillating frequency module 280 is configured to output a fixed oscillating frequency to The pulse control module 230.
  • the adjustable drive power supply 200 further includes a voltage conversion module 290 coupled to the pulse control module 230, the voltage conversion module 290 for converting an input voltage to the pulse control module 230. Working voltage.
  • the adjustable driving power supply 200 further includes a voltage stabilizing module 295, and the voltage stabilizing module 295 is coupled to the voltage converting module 290, and the voltage stabilizing module 295 is configured to stabilize the input voltage at a rated voltage value and the rated voltage.
  • the voltage value is output to the voltage conversion module 290.
  • FIG. 5 is a schematic circuit diagram of an adjustable driving power supply 200 according to an embodiment of the present invention.
  • the pulse control module 230 is a single chip U1, and the input end of the single chip U1 is connected to the voltage dividing filter module 220.
  • the duty cycle output interface of the single chip U1 outputs PWM signals with complementary duty cycles to the first amplification module 240 and the second amplification module 250, respectively.
  • the oscillating frequency module 280 includes a quartz crystal oscillator Y1, a first capacitor C1, and a second capacitor C2. Both ends of the quartz crystal oscillator Y1 are respectively connected to the single chip U1. One end of the first capacitor C1 is connected to the single chip U1, and the other end is grounded. One end of the second capacitor C2 is connected to the single chip U1, and the other end is grounded.
  • the voltage conversion module 290 includes a conversion chip U2, a third capacitance C3, and a fourth capacitance C4.
  • An input terminal of the conversion chip U2 is connected to an input voltage, and an output terminal is connected to a power terminal of the pulse control module 230.
  • the anode of the third capacitor C3 is connected to the output end of the conversion chip U2, and the cathode of the third capacitor C3 is grounded.
  • the fourth capacitor C4 is connected in parallel with the third capacitor C3.
  • the third capacitor C3 is an electrolytic capacitor.
  • the conversion chip U2 may be a model number 78L05 for converting a 12V voltage into a 5V voltage output to the single chip U1.
  • the voltage stabilizing module 295 includes a first transistor Q1, a fifth capacitor C5, a sixth capacitor C6, a first resistor R1, and a first diode D1.
  • the fifth capacitor C5 and the sixth capacitor C6 are both electrolytic capacitors, and the first diode D1 is a Zener diode.
  • the collector of the first transistor Q1 is connected to the input voltage, and the emitter is connected to the input end of the conversion chip U2 of the voltage conversion module 290.
  • the anode of the fifth capacitor C5 is connected to the emitter and the cathode of the first transistor Q1.
  • the cathode of the first diode D1 is connected to the base of the first transistor Q1 and the anode is grounded. Both ends of the first resistor R1 are respectively connected to the base and the collector of the first transistor Q1.
  • the positive pole of the sixth capacitor C6 is connected to the input voltage and the negative pole is grounded.
  • the voltage dividing filter module 220 includes a second resistor R2, a third resistor R3, a fourth resistor R4, and a seventh capacitor C7.
  • the second resistor R2, the fourth resistor R4, and the seventh capacitor C7 are sequentially connected in series, wherein the second resistor R2 is connected to an input voltage away from one end of the fourth resistor R4, and the seventh capacitor C7 is far away.
  • One end of the fourth resistor R4 is grounded.
  • the common connection point of the fourth resistor R4 and the seventh capacitor C7 is connected to the pulse control module 230.
  • One end of the third resistor R3 is connected to a common connection point of the second resistor R2 and the fourth resistor R4, and the other end is grounded.
  • the first amplification module 240 includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, and a second transistor Q2.
  • the eighth resistor R8 is connected to the single-chip U1 at one end, and the other end is connected to the base of the second transistor Q2.
  • the fifth resistor R5 is connected to the input voltage at one end and the second transistor Q2 at the other end.
  • One end of the sixth resistor R6 is connected to a common connection point of the fifth resistor R5 and the second transistor Q2, The other end is connected to the first switch module 260.
  • One end of the seventh resistor R7 is connected to the common connection point of the sixth resistor R6 and the first switch module 260, and the other end is grounded.
  • the second amplification module 250 includes a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, and a third transistor Q3.
  • the eleventh resistor R11 is connected to the single-chip U1, and the other end is connected to the base of the third transistor Q3.
  • the ninth resistor R9 has one end connected to the input voltage and the other end connected to the third triode.
  • One end of the tenth resistor R10 is connected to a common connection point of the ninth resistor R9 and the third transistor Q3, and the other end is connected to the second switch module 270.
  • One end of the twelfth resistor R12 is connected to a common connection point of the tenth resistor R10 and the second switch module 270, and the other end is grounded.
  • the first switch module 260 includes a first FET Q4, and the second switch module 270 includes a second FET Q5.
  • a gate of the first FET Q4 is connected to the first amplifying module 240, a source of the first FET Q4 is grounded, and a drain of the first FET Q4 is connected to the first LED Light emitting array 110.
  • a gate of the second field effect transistor Q5 is connected to the second amplifying module 250, a source of the second field effect transistor Q5 is grounded, and a drain of the second field effect transistor Q5 is connected to the second LED.
  • Light array 120 is
  • the adjustable driving power supply 200 further includes a Schottky diode D2, the anode of the Schottky diode D2 is connected to the input interface J2, and the negative electrode is respectively connected to the first LED lighting array 110 and the second LED lighting array 120.
  • the input interface J2 is configured to provide a driving current for the first LED lighting array 110 and the second LED lighting array 120.
  • the light group interface J1 and the light group interface J3 are respectively connected to the first LED light emitting array 110 and the second LED light emitting array 120.
  • the Schottky diode D2 is connected between the input interface J2 and the lamp set interface J1 and the lamp set interface J3, so as to prevent the positive and negative poles of the power supply connected to the input interface J2 from being reversed to cause the first LED light emitting array 110 and the second Damage to the LED lighting array 120.
  • the working principle of the adjustable driving power supply 200 is: by adjusting the knob of the 0-10V voltage regulator connected to the input interface J4, the 0-10V voltage regulator is on the input interface J4.
  • the second resistor R2 and the third resistor R3 are divided, and filtered by the RC filter composed of the fourth resistor R4 and the seventh capacitor C7, and then output to the single chip U1.
  • the single chip U1 detects the voltage change transmitted, and the single chip U1 adjusts the single chip U1 according to the voltage change.
  • the output interface outputs two PWM signals with complementary duty cycles.
  • the first PWM module is amplified by the first amplification module 240, which is composed of the second transistor Q2, the eighth resistor R8, the fifth resistor R5, the sixth resistor R6, and the seventh resistor R7, and then controls the first The switching state of the FET Q4.
  • the other PWM signal is amplified by the second amplifying module 250 composed of the third transistor Q3, the eleventh resistor R11, the ninth resistor R9, the tenth resistor R10, and the twelfth resistor R12, and then the The second field effect transistor Q5 is in a switching state.
  • the input interface J2 is used to output an LED constant current driving power source to the first LED lighting array 110 and the second LED lighting array 120. Therefore, the brightness of the first LED lighting array 110 connected to the lamp set interface J1 and the second LED lighting array 120 connected to the lamp set interface J3 may change, and the two sets of LED lighting arrays are mixed. When the brightness is strong and weak, the color temperature will change accordingly.
  • the color temperature of the first LED light emitting array 110 connected to the lamp set interface J1 is 6000k.
  • the color temperature of the second LED light emitting array 120 connected to the lamp group interface J3 is 3000k, and when the brightness of the first LED light emitting array 110 and the second LED light emitting array 120 is changed, the two groups of LED light emitting arrays Mixed light, color temperature can be adjusted between 3000k ⁇ 6000K any value.
  • the embodiment of the invention further provides a method for preparing an LED filament with adjustable color temperature, comprising: disposing a first LED illumination array and a second LED illumination array on a substrate.
  • the first LED light-emitting array is coated with a first fluorescent colloid, and the first fluorescent colloid is mixed with different proportions of the first phosphor.
  • a first fluorescent colloid is coated on the first LED light emitting array and the second LED light emitting array, and the second fluorescent glue is mixed with different proportions of the second fluorescent powder.
  • the first LED light emitting array and the second LED light emitting array are electrically connected to an adjustable driving power source.
  • the first LED lighting array comprises a plurality of connected first LED chips
  • the second LED lighting array comprises a plurality of connected second LED chips
  • the first LED lighting array and the second LED lighting array The step of disposing on the substrate includes: alternately arranging the plurality of connected first LED chips and the plurality of connected second LED chips to the substrate.
  • the embodiment of the present invention provides an LED filament with adjustable color temperature, a preparation method, and an LED bulb, which are respectively coated with different ratios by coating the first LED illumination array and the second LED illumination array.
  • the LED filament exhibits a variety of different colors through the first fluorescent colloid and the second fluorescent colloid, thereby improving the applicability and viewing of the LED bulb and enhancing the user experience.

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Abstract

一种色温可调的LED灯丝(100)、制备方法及LED灯泡(300)，属于LED照明领域。其中，色温可调的LED灯丝(100)包括基板(102)、第一LED发光阵列(110)和第二LED发光阵列(120)，LED灯泡(300)包括可调驱动电源(200)，通过将第一LED发光阵列(110)和第二LED发光阵列(120)分别涂覆混合有不同比例荧光粉的不同荧光胶体(105,107)，并且通过可调驱动电源(200)来调节第一LED发光阵列(110)和第二LED发光阵列(120)的色温，即通过调节第一LED发光阵列(110)和第二LED发光阵列(120)的发光亮度，即可使得色温可调的LED灯丝(100)呈现出多种不同的颜色，从而提高LED灯泡的适用性和观赏性，并增强了用户体验。

Description

色温可调的LED灯丝、制备方法及LED灯泡
本申请要求于2017年03月03日提交中国专利局的申请号为CN201710126407.2、名称为“色温可调的LED灯丝及LED灯泡”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及LED照明领域，具体而言，涉及一种色温可调的LED灯丝、制备方法及LED灯泡。
背景技术
色温是表示光源光色的尺度，单位为K(开尔文)。色温在摄影、录象、出版等领域具有重要应用。光源的色温是通过对比它的色彩和理论的热黑体辐射体来确定的。热黑体辐射体与光源的色彩相匹配时的开尔文温度就是那个光源的色温，它直接和普朗克黑体辐射定律相联系。目前使用的办公照明灯具基本是以冷白两色为主。现有技术中虽然可以通过调节色温使LED灯泡呈现暖白光两种光，但是无法通过调节色温而使LED灯呈现出更多的光色，从而使得LED灯的适用性不高，也无法给用户带来更好的体验。
因此，如何通过用不同的方式给LED芯片涂覆荧光胶并调节色温来使LED灯丝呈现出多种颜色，从而提高LED灯的适用性和观赏性，增强用户体验，是目前急需解决的问题。
发明内容
本发明的目的在于提供一种色温可调的LED灯丝、制备方法及LED灯泡，其能够提高LED灯的适用性和观赏性，增强用户体验。
本发明的实施例是这样实现的：
第一方面，本发明实施例提供一种色温可调的LED灯丝，所述色温可调的LED灯丝包括基板、第一LED发光阵列和第二LED发光阵列，所述第一LED发光阵列和所述第二LED发光阵列均设置在所述基板上，所述第一LED发光阵列包括多个连接的第一LED芯片，所述第二LED发光阵列包括多个连接的第二LED芯片，所述第一LED发光阵列均包覆有第一荧光胶体和第二荧光胶体，所述第二LED发光 阵列均包覆有所述第二荧光胶体，所述第一荧光胶体中混合有不同比例的第一荧光粉，所述第二荧光胶体中混合有不同比例的第二荧光粉，所述第一LED发光阵列和所述第二LED发光阵列均用于电连接可调驱动电源，所述可调驱动电源用于连接外部电源。
第二方面，本发明实施例提供一种色温可调的LED灯丝，所述色温可调的LED灯丝包括基板和多个LED发光阵列，所述多个LED发光阵列设置在所述基板上，所述多个LED发光阵列包覆有荧光层，所述荧光层中混合有不同比例的荧光粉，所述多个LED发光阵列电连接有可调驱动电源。
第三方面，本发明实施例提供一种LED灯泡，所述LED灯泡包括泡壳、排气管、带支架的芯柱、设置有可调驱动电源的螺旋灯头以及色温可调的LED灯丝，所述带支架的芯柱由所述排气管支撑用于固定所述色温可调的LED灯丝，所述色温可调的LED灯丝两端设置有金属端子用于与所述可调驱动电源电连接，所述可调驱动电源用于与所述外部电源电连接。
第四方面，本发明实施例提供一种色温可调的LED灯丝的制备方法，所述方法包括：
将第一LED发光阵列和第二LED发光阵列设置在基板上；
在所述第一LED发光阵列上包覆一层第一荧光胶体，该第一荧光胶体中混合有不同比例的第一荧光粉；
在所述第一LED发光阵列和所述第二LED发光阵列上均包覆一层第二荧光胶体，该第二荧光胶中混合有不同比例的第二荧光粉；
将所述第一LED发光阵列和所述第二LED发光阵列与可调驱动电源电连接。
本发明实施例的有益效果是：
本发明实施例提供一种色温可调的LED灯丝、制备方法及LED灯泡，通过将第一LED发光阵列和第二LED发光阵列分别涂覆混合有不同比例的不同荧光胶体，并且通过可调驱动电源来调节该第一LED发光阵列和第二LED发光阵列的色温，即通过调节该第一LED发光阵列和第二LED发光阵列的发光亮度，就可使得该色温可调的LED灯丝通过第一荧光胶体与第二荧光胶体呈现出多种不同的颜色，从而提高LED灯泡的适用性和观赏性，并增强了用户体验。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本发明的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。
图1为本发明实施例提供的一种色温可调的LED灯丝的第一结构示意图；
图2为本发明实施例提供的一种色温可调的LED灯丝的第二结构示意图；
图3为本发明实施例提供的一种LED灯泡的结构示意图；
图4为本发明实施例提供的一种可调驱动电源的结构框图；
图5为本发明实施例提供的一种可调驱动电源的电路原理图。
图标：300-LED灯泡；302-泡壳；304-芯柱；306-排气管；308-螺旋灯头；200-可调驱动电源；210-电压调节模块；220-分压滤波模块；230-脉冲控制模块；240-第一放大模块；250-第二放大模块；260-第一开关模块；270-第二开关模块；280-振荡频率模块；290-电压转换模块；295-稳压模块；100-色温可调的LED灯丝；101-导电线路层；102-基板；110-第一LED发光阵列；112-第一LED芯片；105-第一荧光胶体；120-第二LED发光阵列；122-第二LED芯片；107-第二荧光胶体；108-第一金属端子；109-第二金属端子。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。通常在此处附图中描述和示出的本发明实施例的组件可以以各种不同的配置来布置和设计。
因此，以下对在附图中提供的本发明的实施例的详细描述并非旨在限制要求保护的本发明的范围，而是仅仅表示本发明的选定实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步定义和解释。
此外，术语“第一”、“第二”、“第三”等仅用于区分描述，而不能理解为指示或暗示相对重要性。
在本发明的描述中，还需要说明的是，除非另有明确的规定和限定，术语“设置”、“耦合”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
本发明的其他特征和优点将在随后的说明书阐述，并且，部分地从说明书中变得显而易见，或者通过实施本发明实施例而了解。本发明的目的和其他优点可通过在所写的说明书、权利要求书、以及附图中所特别指出的结构来实现和获得。
为了提高LED灯的适用性和观赏性，增强用户体验，本发明实施例提供一种色温可调的LED灯丝，所述色温可调的LED灯丝包括基板和多个LED发光阵列，所述多个LED发光阵列设置在所述基板上，所述多个LED发光阵列包覆有荧光层，所述荧光层中混合有不同比例的荧光粉，所述多个LED发光阵列电连接有可调驱动电源。
本发明实施例中，基板可以采用刚性基板材料或柔性基板材料制成，只要能用于设置LED发光阵列即可。本实施例中对其不作限定。
根据实际情况，设置在基板上的LED发光阵列可以为两个、三个、四个等，例如，多个LED发光阵列可以包括第一LED发光阵列、第二LED发光阵列和第三LED发光阵列等。包覆于LED发光阵列的荧光层可以为荧光涂层，也可以为荧光胶体，还可以为柔性的透明荧光薄层板。
荧光层的不同位置，可以混合不同比例的不同荧光粉，例如，在包括第一LED发光阵列和第二LED发光阵列时，荧光层包覆于第一LED发光阵列的位置可以混合比例为3:4的红色和黄绿色两种荧光粉，荧光层包覆于第二LED发光阵列的 位置可以混合比例为2:1的黄色和橙色两种荧光粉。荧光层的不同位置，也可以混合不同比例的相同荧光粉，例如，荧光层包覆于第一LED发光阵列的位置可以混合比例为3:4的红色和黄绿色两种荧光粉，荧光层包覆于第二LED发光阵列的位置可以混合比例为2:1的红色和黄绿色两种荧光粉。应当理解，荧光层包覆于多个LED发光阵列的荧光粉还可以采用部分重叠设置等方式，例如，在多个LED发光阵列包括第一LED发光阵列、第二LED发光阵列和第三LED发光阵列时，荧光层可以包括第一荧光胶体、第二荧光胶体和第三荧光胶体，第一荧光胶体中混合有不同比例的第一荧光粉，第二荧光胶体中混合有不同比例的第二荧光粉，第三荧光胶体中混合有不同比例的第三荧光粉，在第一荧光胶体包覆第一LED发光阵列和所述基板的同时，第二荧光胶体可以包覆基板、所述第一LED发光阵列和第二LED发光阵列，第三荧光胶体可以包覆第三LED发光阵列。如此设置，通过可调驱动电源调节各LED发光阵列的色温，即可使得LED灯丝呈现出多种颜色的光。
请参照图1，图1为本发明实施例提供的一种色温可调的LED灯丝100的第一结构示意图，所述色温可调的LED灯丝100包括基板102、第一LED发光阵列110和第二LED发光阵列120，所述第一LED发光阵列110和所述第二LED发光阵列120均设置在所述基板102上。
其中，所述第一LED发光阵列110包括多个连接的第一LED芯片112，所述第二LED发光阵列120包括多个连接的第二LED芯片122。所述多个连接的第一LED芯片112与所述多个连接的第二LED芯片122可延所述基板102交替排列，以便使得该色温可调的LED灯丝100可以更细、更美观。可选的，该色温可调的LED灯丝100的直径可以设置为0.5mm-5mm，如0.5mm、1mm、2.5mm、4mm或5mm等，长度可以大于15mm，这种细长条的形状可以使该柔性LED灯丝利于被弯曲成任意造型，而其本身不受影响，扩大了该色温可调的LED灯丝100的适用范围，为灯具光源产品多元化提供了有利条件。当然，作为一种实施方式，所述多个连接的第一LED芯片112与所述多个连接的第二LED芯片122也可以延所述基板102对称排列，或者按其他方式排列。
另外，所述基板102可以为透明的柔性基板，也可以为有色高透光的柔性基板，其材料可以是聚酰亚胺，聚酰亚胺的优点是具有良好的机械性能、很高的耐辐照性能以及介电性能等，当然，该基板102还可由其他柔性材料或硬性材料制成，柔性基板使得所述色温可调的LED灯丝100可以沿任意角度弯曲成任何形状，沿任意角度弯曲成任何形状后该色温可调的LED灯丝100也可正常发光，提升了LED灯的观赏性和美观性。当然，该基板102也可采用硬性材料制成，该色温可调的LED灯丝100为硬性LED灯丝，则可以通过调节所述第一LED发光阵列110和所述第二LED发光阵列120的色温，使该硬性LED灯丝呈现出多种颜色的光。可选地，在本实施例中，该基板102采用柔性材料制成，该色温可调的LED灯丝100为柔性的LED灯丝，柔性的LED灯丝更满足广大用户的需求。
作为一种实施方式，所述基板102上还可设置有导电线路层101，所述导电线路层101上设有用于连接所述多个第一LED芯片112和所述多个第二LED芯片122的正负极端子，其中，负极端子接LED芯片的负极，正极端子接LED芯片的正极，所述第一LED发光阵列110和所述第二LED发光阵列120均通过锡膏固定在所述导电线路层101上。作为一种实施方式，所述导电线路层101用于串联或并联多个第一LED芯片112，所述导电线路层101用于串联或并联多个第二LED芯片122，所述多个第一LED芯片112与所述多个第二LED芯片122可以延所述导电线路层101交替排列，所述第一LED发光阵列110和所述第二LED发光阵列120均与所述导电线路层101电连接，从而所述多个连接的第一LED芯片112与所述多个连接的第二LED芯片122可以通过所述导电线路层101与外部电源连接，进而导电发光。
作为一种实施方式，所述多个连接的第一LED芯片112之间也可通过串联、并联或串并联结合的方式设置在所述导电线路层101上，所述多个连接的第二LED芯片122之间也可通过串联、并联或串并联结合的方式设置在所述导电线路层101上。
请参照图2，图2为本发明实施例提供的一种色温可调的LED灯丝100的第二结构示意图，所述第一LED发光阵列110包覆有第一荧光胶体105和第二荧光 胶体107，所述第二LED发光阵列120包覆有所述第二荧光胶体107，所述第一荧光胶体105中混合有不同比例的第一荧光粉，所述第二荧光胶体107中混合有不同比例的第二荧光粉。
在该色温可调的LED灯丝100制作过程中，先在第一LED发光阵列110上包覆一层第一荧光胶体105，该第一荧光胶体105中混合有不同比例的第一荧光粉，再在所述第一LED发光阵列110和第二LED发光阵列120上均包覆一层第二荧光胶体107，该第二荧光胶中混合有不同比例的第二荧光粉，可以这样理解，例如，该第一荧光胶体105中混合的第一荧光粉的比例为红色：黄绿色＝2:1，该第二荧光胶体107中混合的第二荧光粉的比例为红色：黄绿色＝3:4，如此设置，通过分别调节所述第一LED发光阵列110与所述第二LED发光阵列120的色温即可使得该色温可调的LED灯丝100呈现出多种颜色。例如，将第一LED发光阵列110的色温调节到3000K，将第二LED发光阵列120的色温调节到6000K，可以呈现出一种颜色，而将第一LED发光阵列110的色温调节到2000K，将第二LED发光阵列120的色温增大到5000K，则可以呈现出另一种颜色。
其中，所述第一荧光胶体105与所述第二荧光胶体107可以为含有不同浓度荧光粉的环氧树脂、硅胶或硅树胶。
作为一种实施方式，所述第一荧光胶体105可以360度包覆所述第一LED发光阵列110和所述基板102，所述第二荧光胶体107可以360度包覆所述基板102、所述第一LED发光阵列110和所述第二LED发光阵列120，使得所述色温可调的LED灯丝100发光效率高。当然，第一荧光胶体105与第二荧光胶体107也可只包覆所述基板102的一侧或两侧，即在基板102的一侧或两侧连续涂覆所述第一荧光胶体105和第二荧光胶体107，在具体的制作过程中可根据实际需求选择不同的荧光胶体的包覆方式，进一步提高所述色温可调的LED灯丝100的适用范围。
在本实施例中，可以通过可调驱动电源200来调节该第一LED发光阵列110和第二LED发光阵列120的色温，所以，该第一LED发光阵列110和第二LED发光阵列120均用于电连接可调驱动电源200，所述可调驱动电源200用于连接外部电源。另外，作为一种实施方式，所述第一LED发光阵列110的两端均设置 有第一金属端子108，所述第二LED发光阵列120的两端均设置有第二金属端子109，所述第一金属端子108和所述第二金属端子109均与所述可调驱动电源200电连接。第一金属端子108可以通过焊接或其他方式与所述第一LED发光阵列110的两端相连接，第二金属端子109也可以通过焊接或其他方式与所述第二LED发光阵列120的两端相连接。
作为一种实施方式，所述多个连接的第一LED芯片112为相同发光色的芯片或不同发光色的芯片，所述多个连接的第二LED芯片122为相同发光色的芯片或不同发光色的芯片，例如，多个连接的第一LED芯片112和多个连接的第二LED芯片122均为相同的蓝光、红光或其他单色光的芯片，或者该多个连接的第一LED芯片112和多个连接的第二LED芯片122中的一些LED芯片为相同的蓝光的芯片，另一些LED芯片为相同的红光的芯片等，以得到不同色的混合光，并且选用不同数量的多种发光色的LED芯片还可得到高显色指数的白光。
需要说明的是，所述色温可调的LED灯丝100还可包括多个第三LED发光阵列，每个所述第三LED发光阵列包括多个连接的第三LED芯片，每个所述第三LED发光阵列均包覆有第三荧光胶体，所述第三荧光胶体混合有不同比例的第三荧光粉，所述多个第三LED发光阵列均用于连接所述可调驱动电源200。例如，该色温可调的LED灯丝100可以包括若干个LED发光阵列，在每一个LED发光阵列上都涂上混合有不同比例的荧光粉的不同荧光胶体，从而可以调节每个LED发光阵列的色温，使得该色温可调的LED灯丝100通过荧光胶体呈现出多种颜色，满足人们的观赏需求。
请参照图3，图3为本发明实施例提供的一种LED灯泡300的结构示意图，所述LED灯泡300包括泡壳302、排气管306、带支架的芯柱304、设置有可调驱动电源200的螺旋灯头308以及上述的色温可调的LED灯丝100。所述带支架的芯柱304由所述排气管306支撑，所述带支架的芯柱304用于固定所述色温可调的LED灯丝100，所述色温可调的LED灯丝100两端设置有金属端子，所述金属端子用于与所述可调驱动电源200电连接，所述可调驱动电源200用于与所述外部电源电连接。
可选地，在本实施例中，所述色温可调的LED灯丝100采用柔性基板制成，可通过金属丝以任意形状例如，五角星形，三角形等各种形状固定在所述芯柱304上，可以根据需要任意设置，或该色温可调的LED灯丝100可以有一定的韧性，也可以不通过金属丝固定就可弯曲成任意形状。泡壳302与芯柱304之间真空密封，构成一个真空密封的腔体，该腔体内充有高导热率低粘度气体，可把色温可调的LED灯丝100工作时产生的热经所述气体的热传导和对流再经泡壳302散发掉。该气体可以为氦、氢或氦氢混合气，在室温下其气压约为50-1520Torr。
另外，所述泡壳302可以为透明的或乳白磨沙有色的泡壳302，也可为部分有反射层的，或部分有一系列小棱镜、小透镜的泡壳302。所述泡壳302的形状可以为A-型、G-型、R-型、PAR-型、T-型或烛型等，也可以为其它现有灯泡的泡壳302的形状中的一种。在此不再过多赘述。
所述可调驱动电源200用于调节所述第一LED发光阵列110与所述第二LED发光阵列120的色温，以使所述色温可调的LED灯丝100通过荧光胶呈现出多种颜色的光。
请参照图4，图4为本发明实施例提供的一种可调驱动电源200的结构框图。所述可调驱动电源200可以包括电压调节模块210、分压滤波模块220、脉冲控制模块230、第一放大模块240、第二放大模块250、第一开关模块260及第二开关模块270，所述电压调节模块210与所述分压滤波模块220耦合，所述分压滤波模块220与所述脉冲控制模块230耦合，所述脉冲控制模块230分别与所述第一放大模块240、所述第二放大模块250耦合，所述第一放大模块240与所述第一开关模块260耦合，所述第二放大模块250与所述第二开关模块270耦合。
所述电压调节模块210用于调节输入电压大小，并将调节后的输入电压输出给所述分压滤波模块220。所述分压滤波模块220用于对所述电压调节模块210输出的电压依次进行分压、滤波处理后输出给所述脉冲控制模块230。所述脉冲控制模块230用于根据分压滤波模块220输出的电压分别输出占空比互补的PWM(Pulse Width Modulation，脉冲宽度调制)信号到所述第一放大模块240和所述第二放大模块250。所述第一放大模块240用于将接收的PWM信号进行放大 后输出给所述第一开关模块260。所述第一开关模块260根据接收的PWM信号的占空比控制与其连接的所述第一LED发光阵列110的发光亮度。所述第二放大模块250用于将接收的PWM信号进行放大后输出给所述第二开关模块270。所述第二开关模块270根据接收的PWM信号的占空比控制与其连接的第二LED发光阵列120的发光亮度。
可选地，所述电压调节模块210安装于输入接口上，该输入接口连接外部电源，用于调节输入接口上的电位，从而使得经由所述分压滤波模块220输出给所述脉冲控制模块230的电压产生变化。在本实施例中，所述电压调节模块210可以用电压调节器实现，所述电压调节器用于调节输入电压大小，并将调节大小后的输入电压输出给所述分压滤波模块220，其具体的电路并不作特别限定，以能实现上述功能为宜。
所述分压滤波模块220用于对输入电压进行分压、滤波处理，使得输出给所述脉冲控制模块230的电压符合要求。
所述脉冲控制模块230用于根据输入电压的大小输出对应占空比的PWM信号。可选的，所述脉冲控制模块230输出两路占空比互补的PWM信号。PWM信号的占空比大小互补，即两路PWM信号的占空比和始终为1。
所述第一放大模块240和所述第二放大模块250均用于对接收的PWM信号进行放大，使得输出到所述第一开关模块260的PWM信号能够驱动所述第一开关模块260及输出到所述第二开关模块270的PWM信号能够驱动所述第二开关模块270。
所述第一开关模块260与所述第一LED发光阵列110连接，用于根据接收的PWM信号的占空比变化控制自身的导通占空比变化，从而改变流经所述第一LED发光阵列110的电流，进而改变所述第一LED发光阵列110的亮度变化。
对应的，所述第二开关模块270与所述第二LED发光阵列120连接，用于根据接收的PWM信号的占空比变化控制自身的导通占空比变化，从而改变流经所述第二LED发光阵列120的电流，进而改变所述第二LED发光阵列120的亮度 变化。
由于输出给所述第一开关模块260的PWM信号占空比与输出给所述第二开关模块270的PWM信号占空比互补。因此，对应的，流经所述第一LED发光阵列110和所述第二LED发光阵列120的电流强弱互补。假设输出给所述第一开关模块260的PWM信号占空比为0.6，输出给所述第二开关模块270的PWM信号占空比为0.4。那么对应的，与所述第一开关模块260连接的第一LED发光阵列110的亮度大于与所述第二开关模块270连接的第二LED发光阵列120的亮度。
因此，在改变输入电压大小后，输出给所述第一开关模块260和所述第二开关模块270的PWM信号的占空比对应发生变化，从而能够改变所述第一LED发光阵列110和所述第二LED发光阵列120的亮度，进而起到调节色温的效果。
另外，作为一种实施方式，所述可调驱动电源200还包括振荡频率模块280，所述振荡频率模块280与所述脉冲控制模块230耦合，所述振荡频率模块280用于输出固定振荡频率给所述脉冲控制模块230。
所述可调驱动电源200还包括电压转换模块290，所述电压转换模块290与所述脉冲控制模块230耦合，所述电压转换模块290用于将输入电压转换为所述脉冲控制模块230所需的工作电压。
所述可调驱动电源200还包括稳压模块295，所述稳压模块295与所述电压转换模块290耦合，所述稳压模块295用于将输入电压稳定在额定电压值并将所述额定电压值输出给所述电压转换模块290。
请参照图5，图5为本发明实施例提供的一种可调驱动电源200的电路原理图。所述脉冲控制模块230为单片机U1，所述单片机U1的输入端接所述分压滤波模块220。所述单片机U1的占空比输出端接口分别向所述第一放大模块240和所述第二放大模块250输出占空比互补的PWM信号。
所述振荡频率模块280包括石英晶振Y1、第一电容C1和第二电容C2。所述石英晶振Y1的两端分别连接所述单片机U1。所述第一电容C1一端与单片机U1连接，另一端接地。所述第二电容C2一端与单片机U1连接，另一端接地。
所述电压转换模块290包括转换芯片U2、第三电容C3和第四电容C4。所述转换芯片U2的输入端接输入电压，输出端接所述脉冲控制模块230的电源端。所述第三电容C3的正极接所述转换芯片U2的输出端，第三电容C3的负极接地。所述第四电容C4与所述第三电容C3并联。其中，所述第三电容C3为电解电容。
所述转换芯片U2的型号可以为78L05，用于将12V电压转换为5V电压输出给所述单片机U1。
所述稳压模块295包括第一三极管Q1、第五电容C5、第六电容C6、第一电阻R1和第一二极管D1。其中，第五电容C5和第六电容C6均为电解电容，所述第一二极管D1为稳压二极管。
所述第一三极管Q1的集电极接输入电压、发射极接所述电压转换模块290的转换芯片U2的输入端。所述第五电容C5的正极接所述第一三极管Q1的发射极、负极接地。所述第一二极管D1的负极接所述第一三极管Q1的基极、正极接地。所述第一电阻R1的两端分别连接所述第一三极管Q1的基极和集电极。所述第六电容C6的正极接输入电压、负极接地。
所述分压滤波模块220包括第二电阻R2、第三电阻R3、第四电阻R4和第七电容C7。
所述第二电阻R2、所述第四电阻R4、所述第七电容C7依次串联，其中所述第二电阻R2远离所述第四电阻R4的一端接输入电压，所述第七电容C7远离所述第四电阻R4的一端接地。所述第四电阻R4和所述第七电容C7的公共连接点接所述脉冲控制模块230。所述第三电阻R3一端接所述第二电阻R2和所述第四电阻R4的公共连接点、另一端接地。
所述第一放大模块240包括第五电阻R5、第六电阻R6、第七电阻R7、第八电阻R8和第二三极管Q2。
所述第八电阻R8一端连接所述单片机U1，另一端接所述第二三极管Q2的基极，所述第五电阻R5一端接输入电压、另一端接所述第二三极管Q2的集电极。所述第六电阻R6一端接所述第五电阻R5和所述第二三极管Q2的公共连接点、 另一端接所述第一开关模块260。所述第七电阻R7一端接所述第六电阻R6和所述第一开关模块260的公共连接点、另一端接地。
第二放大模块250包括第九电阻R9、第十电阻R10、第十一电阻R11、第十二电阻R12和第三三极管Q3。
所述第十一电阻R11一端接所述单片机U1、另一端接所述第三三极管Q3的基极，所述第九电阻R9一端接输入电压、另一端接所述第三三极管Q3的集电极。所述第十电阻R10一端接所述第九电阻R9和所述第三三极管Q3的公共连接点、另一端接所述第二开关模块270。所述第十二电阻R12一端接所述第十电阻R10和所述第二开关模块270的公共连接点、另一端接地。
所述第一开关模块260包括第一场效应管Q4，所述第二开关模块270包括第二场效应管Q5。所述第一场效应管Q4的栅极接所述第一放大模块240，所述第一场效应管Q4的源极接地，所述第一场效应管Q4的漏极接所述第一LED发光阵列110。所述第二场效应管Q5的栅极接所述第二放大模块250，所述第二场效应管Q5的源极接地，所述第二场效应管Q5的漏极接所述第二LED发光阵列120。
可调驱动电源200还包括肖基特二极管D2，所述肖基特二极管D2的正极接输入接口J2，负极分别接所述第一LED发光阵列110和所述第二LED发光阵列120。所述输入接口J2用于为所述第一LED发光阵列110和所述第二LED发光阵列120提供驱动电流。其中，灯组接口J1和灯组接口J3分别连接所述第一LED发光阵列110和所述第二LED发光阵列120。在输入接口J2和灯组接口J1和灯组接口J3之间连接肖基特二极管D2，避免输入接口J2接入的电源正负极反接造成所述第一LED发光阵列110和所述第二LED发光阵列120的损坏。
在本实施例中，该可调驱动电源200的工作原理为：通过调节连接在输入接口J4上的0-10V电压调节器的旋钮，使0-10V电压调节器在所述输入接口J4上的电位产生变化。通过所述第二电阻R2、第三电阻R3分压，再经过所述第四电阻R4、第七电容C7组成的RC滤波器滤波后，输出给所述单片机U1。单片机U1检测传输过来的电压变化，所述单片机U1根据此电压变化调整单片机U1输 出接口输出两路占空比互补的PWM信号。且一路PWM信号经由所述第二三极管Q2、第八电阻R8、第五电阻R5、第六电阻R6、第七电阻R7组成的所述第一放大模块240放大后，控制所述第一场效应管Q4的开关状态。另一路PWM信号经由所述第三三极管Q3、第十一电阻R11、第九电阻R9、第十电阻R10、第十二电阻R12组成的所述第二放大模块250放大后，控制所述第二场效应管Q5开关状态。
所述输入接口J2用于输出LED恒流驱动电源到所述第一LED发光阵列110和所述第二LED发光阵列120。因此，与所述灯组接口J1连接的所述第一LED发光阵列110和与所述灯组接口J3连接的所述第二LED发光阵列120的亮度会产生变化，两组LED发光阵列的混光亮度在此强彼弱的情况下，色温也会发生相应的改变。
在本实施例中，若与所述灯组接口J1连接的第一LED发光阵列110的色温为6000k。与所述灯组接口J3连接的第二LED发光阵列120的色温为3000k，在所述第一LED发光阵列110和所述第二LED发光阵列120的发光亮度改变时，两组LED发光阵列的混光，色温可调整在3000k～6000K之间的任意值。
本发明实施例还提供了一种色温可调的LED灯丝的制备方法，包括：将第一LED发光阵列和第二LED发光阵列设置在基板上。在所述第一LED发光阵列上包覆一层第一荧光胶体，该第一荧光胶体中混合有不同比例的第一荧光粉。在所述第一LED发光阵列和所述第二LED发光阵列上均包覆一层第二荧光胶体，该第二荧光胶中混合有不同比例的第二荧光粉。将所述第一LED发光阵列和所述第二LED发光阵列与可调驱动电源电连接。
可选地，所述第一LED发光阵列包括多个连接的第一LED芯片，所述第二LED发光阵列包括多个连接的第二LED芯片，将第一LED发光阵列和第二LED发光阵列设置在基板上的步骤，包括：将所述多个连接的第一LED芯片与所述多个连接的第二LED芯片延所述基板交替排列。
综上所述，本发明实施例提供一种色温可调的LED灯丝、制备方法及LED灯泡，通过将第一LED发光阵列和第二LED发光阵列分别涂覆混合有不同比例 的不同荧光胶体，并且通过可调驱动电源来调节该第一LED发光阵列和第二LED发光阵列的色温，调节该第一LED发光阵列和第二LED发光阵列的发光亮度，使得该色温可调的LED灯丝通过第一荧光胶体与第二荧光胶体呈现出多种不同的颜色，从而提高LED灯泡的适用性和观赏性，并增强了用户体验。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (19)

  1. 一种色温可调的LED灯丝，其特征在于，所述色温可调的LED灯丝包括基板、第一LED发光阵列和第二LED发光阵列，所述第一LED发光阵列和所述第二LED发光阵列均设置在所述基板上，所述第一LED发光阵列均包覆有第一荧光胶体和第二荧光胶体，所述第二LED发光阵列均包覆有所述第二荧光胶体，所述第一荧光胶体中混合有不同比例的第一荧光粉，所述第二荧光胶体中混合有不同比例的第二荧光粉，所述第一LED发光阵列和所述第二LED发光阵列均配置成电连接可调驱动电源，所述可调驱动电源配置成连接外部电源。
  2. 根据权利要求1所述的色温可调的LED灯丝，其特征在于，所述第一LED发光阵列包括多个连接的第一LED芯片，所述第二LED发光阵列包括多个连接的第二LED芯片，所述多个连接的第一LED芯片与所述多个连接的第二LED芯片延所述基板交替排列。
  3. 根据权利要求2所述的色温可调的LED灯丝，其特征在于，所述多个连接的第一LED芯片为相同发光色的芯片或不同发光色的芯片，所述多个连接的第二LED芯片为相同发光色的芯片或不同发光色的芯片。
  4. 根据权利要求1～3任一项所述的色温可调的LED灯丝，其特征在于，所述基板上设置有导电线路层，所述导电线路层配置成串联或并联多个第一LED芯片，所述导电线路层还配置成串联或并联多个第二LED芯片，所述多个第一LED芯片与所述多个第二LED芯片延所述导电线路层交替排列，所述第一LED发光阵列和所述第二LED发光阵列均与所述导电线路层电连接。
  5. 根据权利要求1～4任一项所述的色温可调的LED灯丝，其特征在于，所述色温可调的LED灯丝还包括多个第三LED发光阵列，每个所述第三LED发光阵列包括多个连接的第三LED芯片，每个所述第三LED发光阵列均包覆有第三荧光胶体，所述第三荧光胶体混合有不同比例的第三荧光粉，所述多个第三LED发光阵列均配置成连接所述可调驱动电源。
  6. 根据权利要求1～5任一项所述的色温可调的LED灯丝，其特征在于，所述第一LED发光阵列的两端均设置有第一金属端子，所述第二LED发光阵列的两端均设置有第二金属端子，所述第一金属端子和所述第二金属端子均与所述可调驱动电 源电连接。
  7. 根据权利要求1～6任一项所述的色温可调的LED灯丝，其特征在于，所述第一荧光胶体360度包覆所述第一LED发光阵列和所述基板，所述第二荧光胶体360度包覆所述基板、所述第一LED发光阵列和所述第二LED发光阵列。
  8. 一种色温可调的LED灯丝，其特征在于，所述色温可调的LED灯丝包括基板和多个LED发光阵列，所述多个LED发光阵列设置在所述基板上，所述多个LED发光阵列包覆有荧光层，所述荧光层中混合有不同比例的荧光粉，所述多个LED发光阵列电连接有可调驱动电源。
  9. 根据权利要求8所述的色温可调的LED灯丝，其特征在于，所述多个LED发光阵列包括第一LED发光阵列和第二LED发光阵列，所述荧光层包括第一荧光胶体和第二荧光胶体，所述第一荧光胶体中混合有不同比例的第一荧光粉，所述第二荧光胶体中混合有不同比例的第二荧光粉；
    所述第一LED发光阵列包覆有所述第一荧光胶体和第二荧光胶体，所述第二LED发光阵列包覆有所述第二荧光胶体，所述第一LED发光阵列和所述第二LED发光阵列均与所述可调驱动电源电连接，所述可调驱动电源配置成连接外部电源。
  10. 根据权利要求8或9所述的色温可调的LED灯丝，其特征在于，所述多个LED发光阵列包括多个第三LED发光阵列，所述荧光层包括第三荧光胶体，所述第三荧光胶体中混合有不同比例的第三荧光粉；
    每个所述第三LED发光阵列包覆有所述第三荧光胶体，所述多个第三LED发光阵列均与所述可调驱动电源电连接。
  11. 根据权利要求9或10所述的色温可调的LED灯丝，其特征在于，所述第一荧光胶体360度包覆所述第一LED发光阵列和所述基板，所述第二荧光胶体360度包覆所述基板、所述第一LED发光阵列和所述第二LED发光阵列。
  12. 一种LED灯泡，其特征在于，所述LED灯泡包括泡壳、排气管、带支架的芯柱、设置有可调驱动电源的螺旋灯头以及权利要求1-11任一所述的色温可调的LED灯丝，所述带支架的芯柱由所述排气管支撑，所述带支架的芯柱配置成固定所述色温可调的LED灯丝，所述色温可调的LED灯丝两端设置有金属端子，所述金属端子配置成与所述可调驱动电源电连接，所述可调驱动电源配置成与所述外部电源电连接。
  13. 根据权利要求12所述的LED灯泡，其特征在于，所述可调驱动电源包括电压调节模块、分压滤波模块、脉冲控制模块、第一放大模块、第二放大模块、第一开关模块及第二开关模块，所述电压调节模块与所述分压滤波模块耦合，所述分压滤波模块与所述脉冲控制模块耦合，所述脉冲控制模块分别与所述第一放大模块、所述第二放大模块耦合，所述第一放大模块与所述第一开关模块耦合，所述第二放大模块与所述第二开关模块耦合；
    所述电压调节模块配置成调节输入电压大小，并将调节后的输入电压输出给所述分压滤波模块，所述分压滤波模块配置成对所述电压调节模块输出的电压进行分压、滤波处理后输出给所述脉冲控制模块，所述脉冲控制模块配置成根据所述分压滤波模块输出的电压分别输出占空比互补的PWM信号到所述第一放大模块和所述第二放大模块，所述第一放大模块配置成将接收的PWM信号进行放大后输出给所述第一开关模块，所述第一开关模块配置成根据接收的PWM信号的占空比控制与其连接的所述第一LED发光阵列的发光亮度，所述第二放大模块配置成将接收的PWM信号进行放大后输出给所述第二开关模块，所述第二开关模块配置成根据接收的PWM信号的占空比控制与其连接的第二LED发光阵列的发光亮度。
  14. 根据权利要求12或13所述的LED灯泡，其特征在于，所述可调驱动电源还包括振荡频率模块，所述振荡频率模块与所述脉冲控制模块耦合，所述振荡频率模块配置成输出固定振荡频率给所述脉冲控制模块。
  15. 根据权利要求12～14任一项所述的LED灯泡，其特征在于，所述可调驱动电源还包括稳压模块和电压转换模块，所述稳压模块与所述电压转换模块耦合，所述电压转换模块与所述脉冲控制模块耦合；
    所述稳压模块配置成将所述输入电压稳定在额定电压值并将所述额定电压值输出给所述电压转换模块，所述电压转换模块配置成将所述稳压模块输出的电压转换为所述脉冲控制模块所需的工作电压。
  16. 根据权利要求12～15任一项所述的LED灯泡，其特征在于，所述泡壳为透明的或乳白磨沙有色的泡壳。
  17. 根据权利要求12～16任一项所述的LED灯泡，其特征在于，所述泡壳的形状为A-型、G-型、R-型、PAR-型、T-型或烛型。
  18. 一种色温可调的LED灯丝的制备方法，其特征在于，所述方法包括：
    将第一LED发光阵列和第二LED发光阵列设置在基板上；
    在所述第一LED发光阵列上包覆一层第一荧光胶体，该第一荧光胶体中混合有不同比例的第一荧光粉；
    在所述第一LED发光阵列和所述第二LED发光阵列上均包覆一层第二荧光胶体，该第二荧光胶中混合有不同比例的第二荧光粉；
    将所述第一LED发光阵列和所述第二LED发光阵列与可调驱动电源电连接。
  19. 根据权利要求18所述的色温可调的LED灯丝的制备方法，其特征在于，所述第一LED发光阵列包括多个连接的第一LED芯片，所述第二LED发光阵列包括多个连接的第二LED芯片，将第一LED发光阵列和第二LED发光阵列设置在基板上的步骤，包括：
    将所述多个连接的第一LED芯片与所述多个连接的第二LED芯片延所述基板交替排列。
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