CN113864741A - Heat dissipation down lamp of colour temperature is adjusted luminance to LED - Google Patents

Heat dissipation down lamp of colour temperature is adjusted luminance to LED Download PDF

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Publication number
CN113864741A
CN113864741A CN202111020090.7A CN202111020090A CN113864741A CN 113864741 A CN113864741 A CN 113864741A CN 202111020090 A CN202111020090 A CN 202111020090A CN 113864741 A CN113864741 A CN 113864741A
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China
Prior art keywords
resistor
emitting diode
chip
color temperature
circuit
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CN202111020090.7A
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Chinese (zh)
Inventor
李文龙
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Ningbo Klite Electric Manufacture Co Ltd
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Ningbo Klite Electric Manufacture Co Ltd
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Priority to CN202111020090.7A priority Critical patent/CN113864741A/en
Publication of CN113864741A publication Critical patent/CN113864741A/en
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    • 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
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • 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
    • F21V23/004—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 arranged on a substrate, e.g. a printed circuit board
    • F21V23/005—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 arranged on a substrate, e.g. a printed circuit board the substrate is supporting also the light source
    • 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]
    • H05B45/10—Controlling the intensity of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light
    • 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
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The invention discloses a heat dissipation down lamp for adjusting light and color temperature of an LED (light emitting diode), wherein a driving part of the heat dissipation down lamp comprises an input terminal, an anti-thunder surge protection circuit, a rectifier bridge, an EMI (electro magnetic interference) circuit, a silicon controlled light adjusting constant current circuit, an output current ripple suppression circuit and a color temperature control circuit which are sequentially connected; the color temperature control circuit comprises a 5-channel control circuit or a switch switching color temperature control circuit, and the color temperature is modulated and modulated by switching a resistor voltage division loop or a voltage reduction current limiting loop. Through only add a simplified circuit structure on former circuit, when reaching the function of mixing colours and temperatures of adjusting luminance, also make the circuit have no redundancy, reduce the cost of installation, make down lamp adjust luminance simply and mix colours and temperatures, improved production installation effectiveness simultaneously.

Description

Heat dissipation down lamp of colour temperature is adjusted luminance to LED
Technical Field
The invention relates to the field of illumination, in particular to a heat dissipation down lamp for adjusting light and color temperature of an LED.
Background
At present, with the aging of the manufacturing and packaging technology of LED chips, the cost of LED elements is greatly reduced, and LEDs are more and more widely used. In market share, more and more traditional down lamps are replaced by LED lamps, and in the field of LED illumination, dimming and color temperature adjustment are always the focus of attention of people. So-called dimming, i.e. adjusting the brightness of a light source; the term "color temperature" is generally used to refer to the adjustment of the color of a light source, and refers to the temperature of a black body at which the color of light emitted from the light source coincides with the hue of light emitted from the black body at a certain temperature. The difference between the color temperature and the brightness is often different, for example, under the irradiation of a high color temperature light source, the brightness is not high, so that people have a cool and shady atmosphere; under the irradiation of a low color temperature light source, the brightness is too high, and a stuffy feeling is brought to people. Therefore, the brightness and the color temperature of the light source are accurately adjusted, and the market competitiveness of the LED illumination product is favorably improved. Currently, two main solutions for LED dimming are to linearly adjust the current of the LED or to switch the driving current back and forth from 0 to the target current value at high frequency. Setting the cycle and duty cycle using pulse width modulation is the simplest way to achieve digital dimming. The principle of PWM dimming is: the external PWM signal changes the duty ratio output by the constant current source to adjust the effective value of the LED driving current, thereby realizing dimming. However, the bottleneck of the existing down lamp of the LED light source is not limited to the LED, but returns to the installation convenience and selling price of the lamp. Most LED lamps are inconvenient to install, a radiating shell needs to be added for ensuring the heat dissipation of the LED, and meanwhile, a color temperature can be adjusted, so that a new color temperature adjusting circuit needs to be added, new parts need to be added to the lamp equipment, and the original LED down lamp is often installed to cause installation trouble and cost rise due to unavailable margin.
For example, a "LED dimming and color temperature adjusting circuit" disclosed in chinese patent document, whose publication No. CN204810631U includes at least one warm light string and at least one cold light string, where the LED string performs dimming and color temperature adjustment, the LED dimming and color temperature adjusting circuit includes a main controller for generating a path of dimming PWM signal and a path of color temperature adjusting PWM signal, a PWM control unit connected to the main controller, and a color temperature adjusting unit connected to the main controller, where an input side of the PWM control unit is connected to an AC input terminal through a rectifying and filtering unit, and an output side is connected to the LED string through a power control unit. Because the main controller respectively controls the PWM control unit and the color temperature mixing unit, and the two paths of signals are mutually independent, the color temperature of the LED lamp string cannot be changed by adjusting the brightness of the LED lamp string, and similarly, the brightness cannot be changed by adjusting the color temperature of the LED lamp string. When the main controller is an N-bit MCU, the dimming and color temperature adjusting level can reach 2 Nx 2N =22N, and the brightness and color temperature of the light source can be accurately adjusted. But this patent can not solve the cost come-up that produces when adjusting luminance mixing of colors temperature circuit increases, and non-traditional LED lamp structure needs to establish the heat dissipation part in addition simultaneously, and the complicated installation of structure is troublesome.
Disclosure of Invention
The invention aims at the problems of higher installation cost and complex structure of the light-adjusting and color-temperature-adjusting down lamp at the present stage; the heat dissipation down lamp for adjusting the color temperature of the LED is provided; the bottom of the heat dissipation lamp body is provided with an open-ended accommodating cavity, the driving board is arranged in the accommodating cavity, the photoelectric board is installed at the bottom of the accommodating cavity and is in thermal connection with the accommodating cavity, the lamp body does not change the service environment of a traditional lamp and achieves the purposes of changing a light source and adjusting color temperature through the change of a circuit, the structure is simplified, and the cost and the installation difficulty are reduced.
The technical problem of the invention is mainly solved by the following technical scheme:
a driving part of the heat dissipation down lamp comprises an input terminal, an anti-thunder surge protection circuit, a rectifier bridge, an EMI circuit, a silicon controlled dimming constant current circuit, an output current ripple suppression circuit and a color temperature control circuit which are sequentially connected; the color temperature control circuit comprises a 5-channel control circuit or a switch switching color temperature control circuit, and the color temperature is modulated and modulated by switching a resistor voltage division loop or a voltage reduction current limiting loop. Through add colour temperature control circuit on the drive plate at traditional down lamp, the former circuit of direct repacking uses the circuit of reequiping of two kinds of differences, only adds a circuit structure of simplifying on former circuit simultaneously, also makes the circuit have not the redundancy when reaching the function of mixing colours and temperatures of adjusting luminance, reduces the cost of installation, makes the down lamp mix colours and temperatures of adjusting luminance simply.
Preferably, the heat dissipation down lamp comprises a lamp head connector, a heat dissipation lamp body, a power supply box, a reflecting cup, a photoelectric power module board and a PC cover which are sequentially connected from top to bottom; the photoelectric power module board comprises a photoelectric board and a driving board; the bottom of the heat dissipation lamp body is provided with an open-ended accommodating cavity, the driving board is arranged in the accommodating cavity, and the photoelectric board is arranged at the bottom of the accommodating cavity and is thermally connected with the accommodating cavity. The down lamp is formed by combining the basic down lamp structure up and down, and is simple to install.
Preferably, when the color temperature control circuit is a 5-channel control circuit, the back of the heat dissipation lamp body is provided with a dial switch, the dial switch is arranged on the back of the photoelectric power module board, the back of the heat dissipation lamp body is additionally provided with the dial switch or a lamp body structure is kept, and the whole lamp body structure can be easily and simply adjusted.
Preferably, the 5-channel control circuit comprises a chip US1, a light emitting diode DC1, a light emitting diode DC2, a light emitting diode DW1, a light emitting diode DW2, a resistor RS9, a resistor RS4, a zener diode Z2, a capacitor C4, a capacitor CS2, a resistor RS8, a toggle switch, a resistor RS5, a resistor RS6, a resistor RS7, a diode DSS1, and a diode DSS 2; the high-voltage output end of the output current ripple suppression circuit is connected with the positive end of a light-emitting diode DC1, the negative end of a light-emitting diode DC1 is connected with the positive end of a light-emitting diode DC2, the negative end of the light-emitting diode DC2 is connected with the negative end of a diode DSS1, the positive end of a diode DSS1 is grounded, and the negative end of a light-emitting diode DC2 is connected with an output port D1 of a chip US 1; the high-voltage output end of the output current ripple suppression circuit is connected with the positive end of a light-emitting diode DW1, the negative end of a light-emitting diode DW1 is connected with the positive end of a light-emitting diode DW2, the negative end of the light-emitting diode DW2 is connected with the negative end of a diode DSS2, the positive end of a diode DSS2 is grounded, and the negative end of a light-emitting diode DW2 is connected with an output port D2 of a chip US 1; the high-voltage output end of the output current ripple suppression circuit is connected with a high-voltage side power supply port VH of the chip US 1; a high-voltage side reference ground port VS of the chip US1 is connected with a low-voltage output end of the output current ripple suppression circuit; the high-voltage side power supply port VH of the chip US1 is connected with a first end of a resistor RS 9; the second end of the resistor RS9 is connected with the first end of the resistor RS4, and the second end of the resistor RS4 is connected with VCC; the GND port of the chip US1 is grounded; the VCC port of the chip US1 is connected with the second end of the capacitor C4, and the first end of the capacitor C4 is grounded; the VCC port of the chip US1 is connected with the negative end of a zener diode Z2, and the positive end of Z2 of the zener diode is grounded; the VCC port of the chip US1 is connected to VCC; the PWMA port of the chip US1 is connected to a first terminal of the capacitor CS2, and a second terminal of the capacitor CS2 is connected to ground; the PWMA port of the chip US1 is connected with the first end of a resistor RS8, and the second end of the resistor RS8 is connected with VCC; the first end of the resistor RS8 is connected with the dial switch; the port 1 of the dial switch is connected with VCC; the 5 port of the dial switch is grounded; the 4 of the dial switch is connected with the second end of the resistor RS5, and the first end of the resistor RS5 is grounded; the 3 port of the dial switch is connected with the second end of the resistor RS6, and the first end of the resistor RS6 is grounded; the 2 port of the dial switch is connected with the second end of the resistor RS7, and the first end of the resistor RS7 is grounded. The circuit structure is simple, can change the colour temperature of down lamp through stirring toggle switch, and the control drive modulation colour temperature through the us1 chip carries out colour mixture adjustment through switch resistance partial pressure, and the color is multiple, and the circuit is simple, can easily reach the effect of control colour temperature.
Preferably, the switching color temperature control circuit comprises a light emitting diode DC1, a light emitting diode DC2, a light emitting diode DW1, a light emitting diode DW2, a diode DS1, a chip US2, a resistor Rt1, a resistor Rt2, a resistor Rt3, a resistor Rt4, a resistor Rt6, a resistor Rc1, a capacitor Ct1, a capacitor Ct2 and a capacitor Ct 3; the high-voltage output end of the output current ripple suppression circuit is connected with a first end of a resistor Rt1, a second end of a resistor Rt1 is connected with a first end of a resistor Rt2, and a second end of a resistor Rt2 is connected with a VCC port of a chip US 2; the second end of the resistor Rt2 is connected with the negative end of the voltage stabilizing diode Z2, and the positive end of the voltage stabilizing diode Z2 is connected with the low-voltage output end of the output current ripple suppression circuit; the second end of the resistor Rt2 is connected with the first end of the capacitor Ct1, and the second end of the capacitor Ct1 is connected with the low-voltage output end of the output current ripple suppression circuit; a first end of the resistor Rt1 is connected with a positive end of the light emitting diode DC1, a negative end of the light emitting diode DC1 is connected with a positive end of the light emitting diode DC2, a negative end of the light emitting diode DC2 is connected with a positive end of the diode DS1, a negative end of the diode DS1 is connected with a first end of the resistor Rc1, and a second end of the resistor Rc1 is connected with a D2 output end of the chip US 2; the first end of the resistor Rt1 is connected with the positive end of the light-emitting diode DW1, the negative end of the light-emitting diode DW1 is connected with the positive end of the light-emitting diode DW2, and the negative end of the light-emitting diode DW2 is connected with the output end of the D1 of the chip US 2; the GND terminal of the chip US2 is grounded; the Vdd end of the chip US2 is connected with the first end of the capacitor Ct2, and the second end of the capacitor Ct2 is connected with the low-voltage output end of the output current ripple suppression circuit; the CLK port of the chip US2 is connected with a first end of a capacitor Ct3, and a second end of the capacitor Ct3 is connected with a low-voltage output end of the output current ripple suppression circuit; the CLK port of the chip US2 is connected with a first end of a resistor Rt4, and a second end of a resistor Rt4 is connected with a low-voltage output end of the output current ripple suppression circuit; the first end of the resistor Rt4 is connected with the second end of the resistor Rt3, the first end of the resistor Rt3 is connected with the second end of the resistor Rt6, and the first end of the resistor Rt6 is connected with the forward end of the diode D1 in the SCR dimming constant current circuit. The circuit uses the US2 chip as a driving chip, adopts the voltage reduction current limiting loop to adjust the color temperature, does not need an external switch, and can directly achieve the control of the temperature and the color light through the adjustment of the original switch.
Preferably, the AC switch switching color temperature sequence in the switch switching color temperature control circuit is changed in turn according to 2700k, 3500k and 4000k, and the single switch structure controls the light and the color temperature of the LED, so that the down lamp is simpler in structure.
Preferably, when the switch switching color temperature control circuit executes the reset operation, 7 times of 'lamp-off-lamp-on' operation are completed within set 10s, and the power supply resets the state to the first state when the lamp is turned on for 7 times. The LED lamp is controlled to change through multiple 'turning on-off' operations, the operation is simple, specific time can be reset, the chip can accurately identify a 'switching' signal of the switch, and fixed time is set to ensure that the chip accurately identifies that the circuit change reaches the reset standard.
Preferably, if the lamp is turned off and on continuously after the reset and the time meets the reset time requirement, the power supply is reset again when the 14 th lamp is turned on, so that a user can control the light and the color temperature of the down lamp at any time through the switch.
The invention has the beneficial effects that:
1. set up dial switch at the heat dissipation lamp body back, set up bright light and the colour temperature of 5CCT control circuit adjustment LED lamps on former circuit, carry out the colour mixture through switch resistance voltage division return circuit with the LED light source, make and carry out the transform of light and colour temperature through dial switch, the power of the former down lamp circuit of direct modification and increase mixing of colors temperature circuit on the former circuit of drive plate guarantee that the colour temperature light source can reduce cost under the condition of adjusting, the simplified structure. Or the voltage-reducing current-limiting loop adjusts the color temperature of light modulation
2. The structure of former down lamp changes the power of down lamp, increases switch switching colour temperature control circuit simultaneously on drive plate meta-circuit, changes light sum colour temperature through the step-down current-limiting circuit among the switch switching colour temperature control circuit, through former down lamp on-off control color temperature of adjusting luminance, simple structure, repacking reduce cost, and guarantee the simple to operate of down lamp.
3. Simple structure is favorable to improving production packaging efficiency.
Drawings
FIG. 1 is an assembly structure view of a heat dissipation down lamp;
fig. 2 is an overall circuit diagram of a driving portion;
FIG. 3 is a circuit diagram of a 5-channel control circuit;
FIG. 4 is a circuit diagram of a switch switching color temperature control circuit;
FIG. 5 is a logic diagram of pin detection of a power control chip in the switching color temperature control circuit;
FIG. 6 is a reset logic diagram of the switch switching color temperature control circuit;
in the figure: 1-a lamp holder connector; 2-a set screw; 3, switching a color temperature adjusting dial handle; 4-a heat dissipation lamp body; 5-a power supply box; 6-a spring; 7-a light reflecting cup; 8-a spring support; 9-a light power module board; 10-PC hood.
Detailed Description
It should be understood that the examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Referring to fig. 1, the heat dissipation down lamp for adjusting color temperature of LED light comprises a lamp head connector 1, a heat dissipation lamp body 4, a power box 5, a reflective cup 7, a light power module board 9, and a PC cover 10, wherein the devices are connected in sequence from top to bottom; the photoelectric power module board comprises a photoelectric board and a driving board; the bottom of the heat dissipation lamp body is provided with an open-ended accommodating cavity, the driving board is arranged in the accommodating cavity, and the photoelectric board is arranged at the bottom of the accommodating cavity and is thermally connected with the accommodating cavity. The light source module board uses an LED light source, the light source is arranged in the middle of the accommodating cavity and is driven to be arranged around the light source, and light emitted by the LED is emitted to the outer side of the lamp body through the PC cover through the reflecting cup.
The power supply is supplied by inputting AC current through the lamp holder connector 1, the lamp holder connector comprises an E26 lamp holder, an 18AWG black-and-white L/N connecting line and a connector male plug, and the connector male plug is inserted into a socket to supply power through a connector. One side of the heat dissipation lamp body 4 is provided with an opening, and the edge is subjected to step anti-glare treatment; one side is the back as the installation accessory, installation carrier and LED heat dissipation carrier. And the power supply box 5 is used as an electrical isolation device of the power supply of the heat dissipation shell box. The spring 6 helps the heat dissipating lamp body to be mounted on the power supply box. The light emitted by the LED is uniformly shaped and output by the reflecting cup 7; the spring support 8 is used for adjusting and fixing the spring 6; the photoelectric power module board is an MCPCB & CEM-3 composite board, the power patch element and the LED are on the same patch surface, and the plug-in element is on the back. The LED light source part is an MCPCB, and the LED power supply part is a CEM-3. The LED aluminum substrate part is tightly attached to the heat dissipation lamp body 4 and the power supply box 5, and the LED power supply part is fixed in the power supply and the cavity. The PC cover is a diffusion cambered surface PC material, isolates the LED from the outside air, and can be dampproof and waterproof at a fixed point, and the PC cover is fixed on the lamp body radiator 4 and the reflection cup 7.
The driving part of the radiating down lamp comprises an input terminal, an anti-thunder surge protection circuit, a rectifier bridge, an EMI circuit, a silicon controlled dimming constant current circuit, an output current ripple suppression circuit and a color temperature control circuit which are sequentially connected; the color temperature control circuit comprises a 5-channel control circuit or a switch switching color temperature control circuit.
The L/N terminal is an input power supply terminal and is inserted into a mains supply through the lamp holder connector for supplying power;
in the lightning surge protection circuit, a resistor FR1 and a variable resistor MOV1 are surge protection and line protection circuits.
In the EMI circuit, an inductor L1, a capacitor C5, a capacitor C2, an inductor Bead1 and a resistor Rs2 form an n-type differential mode interference suppression circuit, and a capacitor CM1 and a capacitor CY1 form a common mode interference suppression circuit.
The thyristor constant current circuit, the capacitor C3 and the resistor R6 are a Bleed absorption circuit which is used as a dimmer maintaining current circuit when the low end of the thyristor is provided.
The thyristor dimming constant-current circuit is a buck boost switching constant-current circuit formed by U1, the circuit is a buck or boost chopper, the output average voltage U0 of the circuit is greater than or less than the input voltage Ui, the polarity is opposite, and the circuit is transmitted by an inductor. An output port FB of the chip U1 is an output voltage OVP circuit, and is pulled up by a transformer T1 and a resistor R4, and a resistor R9 is used as a pull-down resistor. The resistor Rt is an IC switch Ton control resistor. Comp is a current control compensation circuit, which is a pull-down voltage divider circuit composed of a resistor R10, a resistor R11, and a resistor R12, and the capacitors C8 and C7 are bypass capacitors. After the chip receives power supply and starts working, a transformer T1(N1) is coupled with the voltage of N2 and rectified by a diode D2, wherein a capacitor C6 and a capacitor C7 are filter devices, and a resistor R20 is a current-limiting resistor.
The output current ripple suppression circuit can adjust LED flicker or jitter caused by output current fluctuation at the low end of dimming. The resistor RS3, the diode DS1 and the voltage-stabilizing diode Z1 form an MOS G-level power supply circuit, the capacitor CD1 filter circuit, the resistor RS1 current-limiting resistor and the voltage-stabilizing diode Z4 protect MOS (preventing MOS from being output high voltage and static reverse breakdown), and the capacitor CS1 filters noise and optimizes EMI.
The color temperature control mode is divided into A, B, and light and color temperature conversion effects are achieved by modifying the drive.
As shown in fig. 3, the drive part of heat dissipation down lamp includes input terminal, anti thunder surge protection circuit, the rectifier bridge, the EMI circuit, silicon controlled rectifier constant current circuit of adjusting luminance, output current ripple suppression circuit and 5 passageway control circuits, dial switch is increased at heat dissipation lamp body back, LED's drive output passes through the electric current size that two way LED lamps in the middle of the dial switch regulating circuit passed through, different CCT is modulated out through LED's colour mixture, the control range is from 2700K, 3000K, 3500K, 4000K, 5000K, dial switch corresponds with CCT. The dial switch is positioned on the back surface (plug-in surface) of the photoelectric power module board, a switch handle is arranged from the radiator to the outside in a penetrating mode, and CCT required by a user is selected by shifting the CCT switch handle. The input power supply part supplies power through an AC input terminal of the light power supply board, and an input wiring L/N terminal passes through the heat sink to be communicated with a wiring terminal of an outer E26/GU24 lamp holder.
The 5-channel control circuit comprises a chip US1, a light emitting diode DC1, a light emitting diode DC2, a light emitting diode DW1, a light emitting diode DW2, a resistor RS9, a resistor RS4, a voltage stabilizing diode Z2, a capacitor C4, a capacitor CS2, a resistor RS8, a toggle switch, a resistor RS5, a resistor RS6, a resistor RS7, a diode DSS1 and a diode DSS 2; the high-voltage output end of the output current ripple suppression circuit is connected with the positive end of a light-emitting diode DC1, the negative end of a light-emitting diode DC1 is connected with the positive end of a light-emitting diode DC2, the negative end of the light-emitting diode DC2 is connected with the negative end of a diode DSS1, the positive end of a diode DSS1 is grounded, and the negative end of a light-emitting diode DC2 is connected with an output port D1 of a chip US 1; the high-voltage output end of the output current ripple suppression circuit is connected with the positive end of a light-emitting diode DW1, the negative end of a light-emitting diode DW1 is connected with the positive end of a light-emitting diode DW2, the negative end of the light-emitting diode DW2 is connected with the negative end of a diode DSS2, the positive end of a diode DSS2 is grounded, and the negative end of a light-emitting diode DW2 is connected with an output port D2 of a chip US 1; the high-voltage output end of the output current ripple suppression circuit is connected with a high-voltage side power supply port VH of the chip US 1; a high-voltage side reference ground port VS of the chip US1 is connected with a low-voltage output end of the output current ripple suppression circuit; the high-voltage side power supply port VH of the chip US1 is connected with a first end of a resistor RS 9; the second end of the resistor RS9 is connected with the first end of the resistor RS4, and the second end of the resistor RS4 is connected with VCC; the GND port of the chip US1 is grounded; the VCC port of the chip US1 is connected with the second end of the capacitor C4, and the first end of the capacitor C4 is grounded; the VCC port of the chip US1 is connected with the negative end of a zener diode Z2, and the positive end of Z2 of the zener diode is grounded; the VCC port of the chip US1 is connected to VCC; the PWMA port of the chip US1 is connected to a first terminal of the capacitor CS2, and a second terminal of the capacitor CS2 is connected to ground; the PWMA port of the chip US1 is connected with the first end of a resistor RS8, and the second end of the resistor RS8 is connected with VCC; the first end of the resistor RS8 is connected with the dial switch; the port 1 of the dial switch is connected with VCC; the 5 port of the dial switch is grounded; the 4 of the dial switch is connected with the second end of the resistor RS5, and the first end of the resistor RS5 is grounded; the 3 port of the dial switch is connected with the second end of the resistor RS6, and the first end of the resistor RS6 is grounded; the 2 port of the dial switch is connected with the second end of the resistor RS7, and the first end of the resistor RS7 is grounded. The 5-channel control circuit drives a circuit by taking a US1 chip as a control chip, a voltage reduction circuit is formed by a resistor RS9, a resistor RS4 and a voltage stabilizing diode Z2, the input voltage is reduced to the voltage required by the operation of the chip, and a capacitor C4 is used for bypass filtering to filter out abnormal waveforms. During PWMA, the switch divides a voltage detection signal input port, the capacitor CS2 bypasses a noise filtering circuit, the dial switch SW1, the resistor RS5, the resistor RS6 and the resistor RS7 form a switch resistor voltage division circuit, and voltage information is output to the PWMA.
The LED circuit comprises 5000 KLED-light string and 2700 KLED-light string which are connected with a positive input, and the LEDs are respectively connected into the pins D1 and D2 of US 1.
As shown in fig. 4, the driving portion includes an input terminal, a lightning surge protection circuit, a rectifier bridge, an EMI circuit, a thyristor dimming constant current circuit, an output current ripple suppression circuit, and a switching color temperature control circuit.
The switch switching color temperature control circuit comprises a light emitting diode DC1, a light emitting diode DC2, a light emitting diode DW1, a light emitting diode DW2, a diode DS1, a chip US2, a resistor Rt1, a resistor Rt2, a resistor Rt3, a resistor Rt4, a resistor Rt6, a resistor Rc1, a capacitor Ct1, a capacitor Ct2 and a capacitor Ct 3; the high-voltage output end of the output current ripple suppression circuit is connected with a first end of a resistor Rt1, a second end of a resistor Rt1 is connected with a first end of a resistor Rt2, and a second end of a resistor Rt2 is connected with a VCC port of a chip US 2; the second end of the resistor Rt2 is connected with the negative end of the voltage stabilizing diode Z2, and the positive end of the voltage stabilizing diode Z2 is connected with the low-voltage output end of the output current ripple suppression circuit; the second end of the resistor Rt2 is connected with the first end of the capacitor Ct1, and the second end of the capacitor Ct1 is connected with the low-voltage output end of the output current ripple suppression circuit; a first end of the resistor Rt1 is connected with a positive end of the light emitting diode DC1, a negative end of the light emitting diode DC1 is connected with a positive end of the light emitting diode DC2, a negative end of the light emitting diode DC2 is connected with a positive end of the diode DS1, a negative end of the diode DS1 is connected with a first end of the resistor Rc1, and a second end of the resistor Rc1 is connected with a D2 output end of the chip US 2; the first end of the resistor Rt1 is connected with the positive end of the light-emitting diode DW1, the negative end of the light-emitting diode DW1 is connected with the positive end of the light-emitting diode DW2, and the negative end of the light-emitting diode DW2 is connected with the output end of the D1 of the chip US 2; the GND terminal of the chip US2 is grounded; the Vdd end of the chip US2 is connected with the first end of the capacitor Ct2, and the second end of the capacitor Ct2 is connected with the low-voltage output end of the output current ripple suppression circuit; the CLK port of the chip US2 is connected with a first end of a capacitor Ct3, and a second end of the capacitor Ct3 is connected with a low-voltage output end of the output current ripple suppression circuit; the CLK port of the chip US2 is connected with a first end of a resistor Rt4, and a second end of a resistor Rt4 is connected with a low-voltage output end of the output current ripple suppression circuit; the first end of the resistor Rt4 is connected with the second end of the resistor Rt3, the first end of the resistor Rt3 is connected with the second end of the resistor Rt6, and the first end of the resistor Rt6 is connected with the forward end of the diode D1 in the SCR dimming constant current circuit.
The switch switching color temperature control circuit takes the US2 chip as a central control chip, and the drive circuit operates. The CLK pin of the US2 chip can detect the input signal of the chip AC switch, the resistor Rt3 and the resistor Rt6 form a pull-up resistor, the resistor Rt4 is a pull-down resistor, and the capacitor Ct3 is used for noise filtering. The Vdd pin is a power supply pin inside the chip. Vcc is the power supply pin of the chip, a voltage reduction and stabilization circuit is formed by a resistor Rt1, a resistor Rt2 and a voltage stabilization diode Z2, and a capacitor Ct1 is used for filtering. The ports D1 and D2 are respectively connected with 2 paths of LEDs, a diode DS1 and a resistor RC1 to form a voltage reduction current limiting circuit which has the function of adjusting the intermediate color temperature.
The logic sequence of switch switching is as shown in fig. 5, and the AC switch switching display color temperature sequence 2700K → 3500K (2700K &4000K lit together) → 4000K. The power control chip detects the pin input voltage timing sequence as shown in the above figure.
The reset logic of the switch is shown in fig. 6; the switch is reset for 7 times within 10s, the lamp needs to be lightened before reset operation, the lamp lightening time is not limited, the lamp is not turned on for the first time, the lamp is turned off and turned on for one time, and the power supply can reset the state to the first state (2700K lightening) when the lamp is turned on again after the lamp is turned off for the 7 th time; the operation requirements of turning off and turning on the lamp during resetting are as follows: 7 times of 'lamp-off-lamp-on' operations are finished within the Trs time (typical value is 10 s), and the power supply resets the state to the first state when the lamp is turned on for the 7 th time (the total time is calculated, and the time of lamp-off each time needs to be less than Tsw time); if the "light off-light on" action is still done after the reset and the time meets the reset time requirement, the power supply will reset again at the 14 th light on, and so on.

Claims (8)

1. The utility model provides a LED adjusts heat dissipation down lamp of mixing of colors temperature that adjusts luminance which characterized in that: the driving part of the radiating down lamp comprises an input terminal, an anti-thunder surge protection circuit, a rectifier bridge, an EMI circuit, a silicon controlled dimming constant current circuit, an output current ripple suppression circuit and a color temperature control circuit which are sequentially connected; the color temperature control circuit comprises a 5-channel control circuit or a switch switching color temperature control circuit, and the color temperature is modulated and modulated by switching a resistor voltage division loop or a voltage reduction current limiting loop.
2. The heat dissipation down lamp of LED color temperature that adjusts of adjusting of claim 1, characterized in that: the heat dissipation down lamp comprises a lamp head connector, a heat dissipation lamp body, a power supply box, a reflection cup, a photoelectric power module board and a PC cover which are sequentially connected from top to bottom; the photoelectric power module board comprises a photoelectric board and a driving board; the bottom of the heat dissipation lamp body is provided with an open-ended accommodating cavity, the driving board is arranged in the accommodating cavity, and the photoelectric board is arranged at the bottom of the accommodating cavity and is thermally connected with the accommodating cavity.
3. The heat dissipation down lamp of LED color temperature of adjusting of claim 1 or 2, characterized in that: when the color temperature control circuit is a 5-channel control circuit, the back of the heat dissipation lamp body is provided with a dial switch, and the dial switch is arranged on the back of the photoelectric power module board.
4. The heat dissipation down lamp of LED color temperature that adjusts of adjusting of claim 1, characterized in that: the 5-channel control circuit comprises a chip US1, a light emitting diode DC1, a light emitting diode DC2, a light emitting diode DW1, a light emitting diode DW2, a resistor RS9, a resistor RS4, a voltage stabilizing diode Z2, a capacitor C4, a capacitor CS2, a resistor RS8, a toggle switch, a resistor RS5, a resistor RS6, a resistor RS7, a diode DSS1 and a diode DSS 2; the high-voltage output end of the output current ripple suppression circuit is connected with the positive end of a light-emitting diode DC1, the negative end of a light-emitting diode DC1 is connected with the positive end of a light-emitting diode DC2, the negative end of the light-emitting diode DC2 is connected with the negative end of a diode DSS1, the positive end of a diode DSS1 is grounded, and the negative end of a light-emitting diode DC2 is connected with an output port D1 of a chip US 1; the high-voltage output end of the output current ripple suppression circuit is connected with the positive end of a light-emitting diode DW1, the negative end of a light-emitting diode DW1 is connected with the positive end of a light-emitting diode DW2, the negative end of the light-emitting diode DW2 is connected with the negative end of a diode DSS2, the positive end of a diode DSS2 is grounded, and the negative end of a light-emitting diode DW2 is connected with an output port D2 of a chip US 1; the high-voltage output end of the output current ripple suppression circuit is connected with a high-voltage side power supply port VH of the chip US 1; a high-voltage side reference ground port VS of the chip US1 is connected with a low-voltage output end of the output current ripple suppression circuit; the high-voltage side power supply port VH of the chip US1 is connected with a first end of a resistor RS 9; the second end of the resistor RS9 is connected with the first end of the resistor RS4, and the second end of the resistor RS4 is connected with VCC; the GND port of the chip US1 is grounded; the VCC port of the chip US1 is connected with the second end of the capacitor C4, and the first end of the capacitor C4 is grounded; the VCC port of the chip US1 is connected with the negative end of a zener diode Z2, and the positive end of Z2 of the zener diode is grounded; the VCC port of the chip US1 is connected to VCC; the PWMA port of the chip US1 is connected to a first terminal of the capacitor CS2, and a second terminal of the capacitor CS2 is connected to ground; the PWMA port of the chip US1 is connected with the first end of a resistor RS8, and the second end of the resistor RS8 is connected with VCC; the first end of the resistor RS8 is connected with the dial switch; the port 1 of the dial switch is connected with VCC; the 5 port of the dial switch is grounded; the 4 of the dial switch is connected with the second end of the resistor RS5, and the first end of the resistor RS5 is grounded; the 3 port of the dial switch is connected with the second end of the resistor RS6, and the first end of the resistor RS6 is grounded; the 2 port of the dial switch is connected with the second end of the resistor RS7, and the first end of the resistor RS7 is grounded.
5. The heat dissipation down lamp of LED color temperature that adjusts of adjusting of claim 1, characterized in that: the switch switching color temperature control circuit comprises a light emitting diode DC1, a light emitting diode DC2, a light emitting diode DW1, a light emitting diode DW2, a diode DS1, a chip US2, a resistor Rt1, a resistor Rt2, a resistor Rt3, a resistor Rt4, a resistor Rt6, a resistor Rc1, a capacitor Ct1, a capacitor Ct2 and a capacitor Ct 3; the high-voltage output end of the output current ripple suppression circuit is connected with a first end of a resistor Rt1, a second end of a resistor Rt1 is connected with a first end of a resistor Rt2, and a second end of a resistor Rt2 is connected with a VCC port of a chip US 2; the second end of the resistor Rt2 is connected with the negative end of the voltage stabilizing diode Z2, and the positive end of the voltage stabilizing diode Z2 is connected with the low-voltage output end of the output current ripple suppression circuit; the second end of the resistor Rt2 is connected with the first end of the capacitor Ct1, and the second end of the capacitor Ct1 is connected with the low-voltage output end of the output current ripple suppression circuit; a first end of the resistor Rt1 is connected with a positive end of the light emitting diode DC1, a negative end of the light emitting diode DC1 is connected with a positive end of the light emitting diode DC2, a negative end of the light emitting diode DC2 is connected with a positive end of the diode DS1, a negative end of the diode DS1 is connected with a first end of the resistor Rc1, and a second end of the resistor Rc1 is connected with a D2 output end of the chip US 2; the first end of the resistor Rt1 is connected with the positive end of the light-emitting diode DW1, the negative end of the light-emitting diode DW1 is connected with the positive end of the light-emitting diode DW2, and the negative end of the light-emitting diode DW2 is connected with the output end of the D1 of the chip US 2; the GND terminal of the chip US2 is grounded; the Vdd end of the chip US2 is connected with the first end of the capacitor Ct2, and the second end of the capacitor Ct2 is connected with the low-voltage output end of the output current ripple suppression circuit; the CLK port of the chip US2 is connected with a first end of a capacitor Ct3, and a second end of the capacitor Ct3 is connected with a low-voltage output end of the output current ripple suppression circuit; the CLK port of the chip US2 is connected with a first end of a resistor Rt4, and a second end of a resistor Rt4 is connected with a low-voltage output end of the output current ripple suppression circuit; the first end of the resistor Rt4 is connected with the second end of the resistor Rt3, the first end of the resistor Rt3 is connected with the second end of the resistor Rt6, and the first end of the resistor Rt6 is connected with the forward end of the diode D1 in the SCR dimming constant current circuit.
6. The heat dissipation down lamp of LED color temperature that adjusts of adjusting of claim 5, characterized in that: the switching color temperature sequence of the AC switch in the switching color temperature control circuit is changed in turn according to 2700k, 3500k and 4000 k.
7. The heat dissipation down lamp of LED color temperature that adjusts of adjusting of claim 5, characterized in that: when the switch switching color temperature control circuit executes reset operation, 7 times of 'lamp-off-lamp-on' operation needs to be completed within set 10s, and the power supply resets the state to the first state when the lamp is turned on for 7 times.
8. The heat dissipation down lamp of LED color temperature that adjusts of adjusting of claim 5, characterized in that: if the lamp is turned off and on after the reset continues and the time meets the reset time requirement, the power supply will reset again at the 14 th lamp turn-on.
CN202111020090.7A 2021-09-01 2021-09-01 Heat dissipation down lamp of colour temperature is adjusted luminance to LED Pending CN113864741A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116600437A (en) * 2023-07-19 2023-08-15 深圳市美尚照明有限公司 LED lamp strip and method for quickly adjusting color temperature and color tolerance
CN118075940A (en) * 2024-04-25 2024-05-24 佛山市南海区平翊电子有限公司 Multi-gear dimmable lighting circuit, PCB and lighting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116600437A (en) * 2023-07-19 2023-08-15 深圳市美尚照明有限公司 LED lamp strip and method for quickly adjusting color temperature and color tolerance
CN118075940A (en) * 2024-04-25 2024-05-24 佛山市南海区平翊电子有限公司 Multi-gear dimmable lighting circuit, PCB and lighting device

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