CA2886969A1 - Light emitting diode (led) torchiere lamp with overheat and overvoltage protection functions - Google Patents
Light emitting diode (led) torchiere lamp with overheat and overvoltage protection functions Download PDFInfo
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- CA2886969A1 CA2886969A1 CA2886969A CA2886969A CA2886969A1 CA 2886969 A1 CA2886969 A1 CA 2886969A1 CA 2886969 A CA2886969 A CA 2886969A CA 2886969 A CA2886969 A CA 2886969A CA 2886969 A1 CA2886969 A1 CA 2886969A1
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- overheat
- lamp
- overvoltage protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/202—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage for dc systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
- H02H7/205—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment for controlled semi-conductors which are not included in a specific circuit arrangement
-
- 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]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
- H05B45/56—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving measures to prevent abnormal temperature of the LEDs
-
- 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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/20—Responsive to malfunctions or to light source life; for protection
- H05B47/24—Circuit arrangements for protecting against overvoltage
-
- 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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/20—Responsive to malfunctions or to light source life; for protection
- H05B47/28—Circuit arrangements for protecting against abnormal temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S6/00—Lighting devices intended to be free-standing
-
- 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]
-
- 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]
- H05B45/30—Driver circuits
- H05B45/32—Pulse-control circuits
- H05B45/325—Pulse-width modulation [PWM]
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The present invention discloses an LED torchiere lamp with overheat and overvoltage protection functions. The LED torchiere lamp includes primarily a high-voltage rectifying circuit which rectifies high-voltage alternating current as high-voltage direct current, and an IC drive circuit. The IC drive circuit is built in with an electronic switching circuit to drive the LED lamp, an analog light dimmer circuit and a PWM light dimmer circuit, in addition to an overheat and overvoltage protection circuit which is used to improve the safety of and extend the lifetime of usage of the LED torchiere lamp, thereby having the practicality.
Description
LIGHT EMITTING DIODE (LED) TORCH1ERE LAMP WITH
OVERHEAT AND OVERVOLTAGE PROTECTION FUNCTIONS
BACKGROUND OF THE INVENTION
(a) Field of the Invention The present invention relates to an LED (Light Emitting Diode) torchiere lamp with overheat and overvoltage protection functions, and more particularly to a torchiere lamp which includes a high-voltage input power source combining with an IC (Integrated Circuit) drive circuit without using a transformer and an electrolytic capacitor, and is provided with an overheat and overvoltage protection circuit, such that the safety of the LED torchiere lamp can be improved and the lifetime of usage of the LED [amp can be extended, thereby having the practicality.
(b) Description of the Prior Art Most of the conventional torchiere lamps use halogen bulbs which may burn people who use the lamps or cause fire to endanger lives and properties. Therefore, an overheat de-energizing circuit needs to be provided to pause the operation of the halogen bulb, which will affect the effect of lighting and the safety. Although there are the LED torchiere lamps afterward, a conventional LED torchiere lamp uses high-voltage alternating current of 100V-240V as the power source, as shown in FIG. 1;
therefore, a voltage reduction technology should be used to acquire lower voltage, wherein a transformer or a switching mode power supply is normally used to reduce the voltage, and then the AC (Alternating Current) current is converted to DC (Direct Current) current which is converted in turn to a constant source of DC current, thereby making the LED source to illuminate. However, a conventional AC-to-DC conversion system is large in size and has high loss to increase the cooling cost considerably, which shortens the lifetime of usage of the LED lamp greatly.
Accordingly, the present invention discloses an LED torchiere lamp that operates without using the conventional AC-to-DC conversion system and the electrolytic capacitor to extend the lifetime of usage significantly and increase the safety.
SUMMARY OF THE INVENTION
In one aspect of the present invention, there is disclosed an LED
torchiere lamp with overheat and overvoltage protection functions, and more particularly to a torchiere lamp which includes a high-voltage input power source combining with an IC drive circuit without using a transformer and an electrolytic capacitor, providing constant current to
OVERHEAT AND OVERVOLTAGE PROTECTION FUNCTIONS
BACKGROUND OF THE INVENTION
(a) Field of the Invention The present invention relates to an LED (Light Emitting Diode) torchiere lamp with overheat and overvoltage protection functions, and more particularly to a torchiere lamp which includes a high-voltage input power source combining with an IC (Integrated Circuit) drive circuit without using a transformer and an electrolytic capacitor, and is provided with an overheat and overvoltage protection circuit, such that the safety of the LED torchiere lamp can be improved and the lifetime of usage of the LED [amp can be extended, thereby having the practicality.
(b) Description of the Prior Art Most of the conventional torchiere lamps use halogen bulbs which may burn people who use the lamps or cause fire to endanger lives and properties. Therefore, an overheat de-energizing circuit needs to be provided to pause the operation of the halogen bulb, which will affect the effect of lighting and the safety. Although there are the LED torchiere lamps afterward, a conventional LED torchiere lamp uses high-voltage alternating current of 100V-240V as the power source, as shown in FIG. 1;
therefore, a voltage reduction technology should be used to acquire lower voltage, wherein a transformer or a switching mode power supply is normally used to reduce the voltage, and then the AC (Alternating Current) current is converted to DC (Direct Current) current which is converted in turn to a constant source of DC current, thereby making the LED source to illuminate. However, a conventional AC-to-DC conversion system is large in size and has high loss to increase the cooling cost considerably, which shortens the lifetime of usage of the LED lamp greatly.
Accordingly, the present invention discloses an LED torchiere lamp that operates without using the conventional AC-to-DC conversion system and the electrolytic capacitor to extend the lifetime of usage significantly and increase the safety.
SUMMARY OF THE INVENTION
In one aspect of the present invention, there is disclosed an LED
torchiere lamp with overheat and overvoltage protection functions, and more particularly to a torchiere lamp which includes a high-voltage input power source combining with an IC drive circuit without using a transformer and an electrolytic capacitor, providing constant current to
2 drive the LED lamp. The LED torchiere lamp is also provided with an overheat and overvoltage protection circuit to improve the safety and extend the lifetime of usage, thereby having the practicality.
To achieve this, the present invention discloses an LED torchiere lamp with overheat and overvoltage protection functions, including primarily a high-voltage rectifying circuit which rectifies high-voltage alternating current as high-voltage direct current. The functions of major elements of the high-voltage rectifying circuit are described below:
1. Fl ¨ a fuse (250/1A), which permits automatic shut-off to protect the circuit when a subsequent circuit is short-circuited;
2. R7 and R8 ¨ two chip resistors (22R), which are used for surge (current) protection;
To achieve this, the present invention discloses an LED torchiere lamp with overheat and overvoltage protection functions, including primarily a high-voltage rectifying circuit which rectifies high-voltage alternating current as high-voltage direct current. The functions of major elements of the high-voltage rectifying circuit are described below:
1. Fl ¨ a fuse (250/1A), which permits automatic shut-off to protect the circuit when a subsequent circuit is short-circuited;
2. R7 and R8 ¨ two chip resistors (22R), which are used for surge (current) protection;
3. RV1 ¨ a varistor, which prevents the circuit from showing all kinds of transient voltage and absorbs the surge current;
4. D1 ¨ a chip bridge, which rectifies an AC supply mains as DC
voltage;
voltage;
5. D2 ¨ a chip diode, which protects the lumped circuit from ESD
(Electrostatic Discharge);
(Electrostatic Discharge);
6. D3, D4, D5, D6 ¨ four chip diodes, which protect each LED from ESD;
7. R1, R2, R3, R4, R5, R6 ¨ six chip resistors (15R), which modulate the current value at the IC output terminal;
8. C1, 02, 03 ¨three chip capacitors (0.1u), which are used as the filter capacitors at the IC supply terminal.
The pin numbers and names of the IC drive circuit of the present invention are described below:
1. VCH an overvoltage detection input terminal, 2. VSSA a common, 3. CS1 connecting to a current sensing resistor 1;
4. VSSB a ground, 5. REG5 a power source at 5V, 6. TS an overheat protection input terminal, 7. VSSB a ground, 8. CS2 connecting to a current sensing resistor 2,
The pin numbers and names of the IC drive circuit of the present invention are described below:
1. VCH an overvoltage detection input terminal, 2. VSSA a common, 3. CS1 connecting to a current sensing resistor 1;
4. VSSB a ground, 5. REG5 a power source at 5V, 6. TS an overheat protection input terminal, 7. VSSB a ground, 8. CS2 connecting to a current sensing resistor 2,
9. VDIM an analog light dimmer signal input terminal,
10. PWM (Pulse Width Modulation) a PWM light dimmer signal input terminal,
11. DN8 a channel 8,
12. DN7 a channel 7,
13. DN6 a channel 6,
14. DN5 a channel 5,
15. VPP (Virtual Power Plant) a high-voltage power source,
16. VPP ID a single-wired electronic switch power-harvesting current control terminal,
17. DN1 a channel 1,
18. DN2 a channel 2,
19. DN3 a channel 3,
20. DN4 a channel 4.
First of all, the junctions VPPA, DN1A, DN2A, DN3A, DN4 of the high-voltage rectifying circuit are connected to the junctions VPPA, DN1A, DN2A, DN3A, DN4 of the LED lamp, and the junctions of the high-voltage rectifying circuit are connected to the IC drive circuit through the chip resistors (OR) J1¨J12 of the switching circuit, with the chip resistors being used for the jumper protection. The junction VPPA of the high-voltage rectifying circuit is connected to VPP1, VPP2, VPP3 of the 15th pin of Ul, U2, U3 of IC through the chip resistors J1, J5, J9, and then a high-voltage power source is introduced, connecting DN1A to the 14th pin and the 17th pin of U1, U2, U3 of IC through the chip resistors (OR) J2, J6, J10, wherein the 14th pin and the 17th pin are DN11, DN21, DN31. DN2A is connected to the 13th pin and the 18th pin of U1, U2, U3 of IC through the chip resistors (OR) J3, J7, J11, wherein the 13th pin and the 18th pin are DN12, DN22, DN32. DN3A is connected to the 12th pin and the 19th pin of U1, U2, U3 of IC through the chip resistors (OR) J4, J8, J12, wherein the 12th pin and the 19th pin are DN13, DN23, DN33. Accordingly, the high-voltage rectifying circuit can be connected to the IC drive circuit.
There can be one or plural IC drive circuits depending upon the quantity of the loaded chip LED lamps. The IC drive circuit is built in with an electronic switching circuit required for driving the LED lamp, an analog light dimmer circuit and a PWM light dimmer circuit, in addition to an overheat and overvoltage protection circuit which is connected externally to R1, R2 for modulating the IC output current and to Cl for providing a stable filtering wave as supply power to IC. Constant current is provided to the LED lamp through the high-voltage rectifying current and the IC
drive circuit. When the temperature of the LED lamp exceeds a temperature setting of 85-95 C, the overheat and overvoltage protection circuit starts to drop the voltage and decrease the current to cool down and reduce the brightness of the LED lamp. Therefore, the safety of the LED torchiere lamp is improved and the lifetime of usage of the LED
torchiere lamp is extended, thereby having the practicality.
In another aspect of the present invention, there is provided an LED
torchiere lamp with overheat and overvoltage protection functions, wherein the overvoltage detection input terminal VCH at the 1st pin, the overheat protection input terminal TS at the 6th pin, the analog light dimmer signal input terminal VDIM at the 9th pin, the PWM light dimmer signal input terminal at the 10th pin, and the single-wired electronic switch power-harvesting current control input terminal VPP_ID at the le pin, disposed on the IC drive circuit, can be optionally connected or disconnected according to the required function, thereby facilitating the versatility of the present invention.
In'sttill another aspect of the present invention, there is provided an LED torchiere lamp with overheat and overvoltage protection functions, wherein all the circuits and elements of the high-voltage rectifying circuit and the IC drive circuit are installed on a single PCB (Printed Circuit Board) which is disposed on a top of the torchiere lamp to reduce the area of installation.
To enable a further understanding of the said aspects and the technological methods of the invention herein, the brief description of the drawings below is followed by the detailed description of the preferred embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a schematic view of a prior art.
FIG. 2 shows a simple schematic view of the present invention.
FIG. 3 shows a schematic view of a high-voltage rectifying circuit of the present invention.
FIG. 4 shows a schematic view of a switching circuit of the present invention.
FIG. 5 shows a schematic view of pins of an IC drive circuit of the present invention.
FIG. 6 shows a schematic view of the connection of an LED lamp at a load end of the present invention.
FIG. 7 shows a schematic view of installation of circuits and elements of the present invention.
FIG. 8 shows a partially enlarged schematic view of the installation of circuits and elements of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to FIGS. 2-8, the present invention discloses an LED
torchiere lamp with overheat and overvoltage protection functions, and more particularly to an LED torchiere lamp which includes a high-voltage input power source combining with an IC drive circuit without using a transformer and an electrolytic capacitor (as shown in FIG. 2), and which is driven by constant current. The present invention comprises primarily a high-voltage rectifying circuit 1 which rectifies high-voltage alternating current as high-voltage direct current. The functions of major elements of the high-voltage rectifying circuit 1 are described below:
1. Fl ¨ a fuse (250/1A) 110, which permits automatic shut-off to protect the circuit when a subsequent circuit is short-circuited;
2. R7 and R8 ¨ two chip resistors (22R) 120, which are used for surge (current) protection;
3. RV1 ¨ a varistor 130, which prevents the circuit from showing all kinds of transient voltage and absorbs the surge current;
4. D1 ¨ a chip bridge 140, which rectifies an AC supply mains as DC voltage;
5. D2 ¨ a chip diode 150, which protects the lumped circuit from ESD;
6. D3, D4, D5, D6 four chip diodes 150, which protect each LED
from ESD;
7. R1, R2, R3, R4, R5, R6 ¨ six chip resistors (15R) 160, which modulate the current value at the IC output terminal;
8. Cl, 02, C3 ¨ three chip capacitors 170, which are used as the filter capacitors at the IC supply terminal.
The pin numbers and names of the IC drive circuit of the present invention are described belcw:
1. VCH an overvoltage detection input terminal, 2. VSSA a common, 3. CS1 connecting to a current sensing resistor 1;
4. VSSB a ground, 5. REG5 a power source at 5V, 6. TS an overheat protection input terminal, 7. VSSB a ground, 8. CS2 connecting to a current sensing resistor 2, 9. VDIM an analog light dimmer signal input terminal, 10. PWM a PWM light dimmer signal input terminal, 11. DN8 a channel 8, 12. DN7 a channel 7, 13. DN6 a channel 6, 14. DN5 a channel 5, =
15. VPP a high-voltage power source, 16. VPP ID a single-wired electronic switch power-harvesting current control terminal, 17. DN1 a channel 1, 18. 0N2 a channel 2, 19. DN3 a channel 3, 20. DN4 a channel 4.
First of all, referring to FIGS. 3-6, the junctions VPPA, DN1A, DN2A, DN3A, DN4 of the high-voltage rectifying circuit 1 in FIG. 3 are connected to the junctions VPPA, DN1A, DN2A, DN3A, DN4 of the LED lamp 3 in FIG. 6, and the junctions of the high-voltage rectifying circuit 1 are connected to the IC drive circuit 2 through the chip resistors 18 (OR) J1-J12 of the switching circuit, with the chip resistors 18 being used for the jumper protection. The junction VPPA of the high-voltage rectifying circuit 1 is connected to VPP1, VPP2, VPP3 of the 15th pin of U1, U2, U3 of IC drive circuit 2 through the chip resistors 18 J1, J5, J9, and then a high-voltage power source is introduced, connecting DN1Ato the 14th pin and the 17th pin of Ul, U2, U3 of IC drive circuit 2 through the chip resistors 18 (OR) J2, J6, J10, wherein the 14th pin and the 17th pin are DN11, DN21, DN31. DN2A is connected to the 13th pin and the 18th pin of Ul, U2, U3 of IC drive circuit 2 through the chip resistors 18 (OR) J3, J7, J11, wherein the 13th pin and the 18th pin are DN12, DN22, DN32. DN3A
is connected to the 12th pin and the 19th pin of Ul, U2, U3 of IC drive circuit 2 through the chip resistors 18 (OR) J4, J8, J12, wherein the 12th pin and the 19th pin are DN13, DN23, DN33. Accordingly, the high-voltage rectifying circuit 1 can be connected to the IC drive circuit 2.
There can be one or plural IC drive circuits 2 depending upon the quantity of the loaded chip LED lamps 3. The IC drive circuit 2 is built in with an electronic switching circuit required for driving the LED lamp 3, an analog light dimmer circuit and a PWM light dimmer circuit, in addition to an overheat and overvoltage protection circuit which is connected externally to R1, R2 for modulating the IC output current and to Cl for providing a stable filtering wave as supply power to IC drive circuit 2. Constant current is provided to the LED lamp 3 through the high-voltage rectifying current 1 and the IC drive circuit 2. When the temperature of the LED
lamp 3 exceeds a temperature setting of 85-95 C, the overheat and overvoltage protection circuit starts to drop the voltage and decrease the current to cool down and reduce the brightness of the LED lamp 3.
Therefore, the safety of the LED torchiere lamp is improved and the lifetime of usage of the LED torchiere lamp is extended, thereby having the practicality.
Another embodiment of the present invention is to provide an LED
torchiere lamp with overheat and overvoltage protection functions, wherein the overvoltage detection input terminal VCH at the lst pin, the overheat protection input terminal TS at the 6th pin, the analog light dimmer signal input terminal VDI1V1 at the 9th pin, the PWM light dimmer signal input terminal at the 10th pin, and the single-wired electronic switch power-harvesting current control input terminal VPP_ID at the 16th pin, disposed on the IC drive circuit 2, can be optionally connected or disconnected according to the required function, thereby facilitating the versatility of the present invention.
Still another embodiment of the present invention is to provide an LED torchiere lamp with overheat and overvoltage protection functions, wherein all the circuits and elements of the high-voltage rectifying circuit and the IC drive circuit are installed on a single PCB (Printed Circuit Board) 4 (as shown in FIG. 7 and FIG. 8) which is disposed on a top of the torchiere lamp to reduce the area of installation.
By connecting the high-voltage rectifying circuit 1 with the IC drive circuit 2, constant current is provided to the LED lamp 3 without using the conventional transformer or electrolytic capacitor, and with the overhead and overvoltage protection functions. Accordingly, the safety of the LED
torchiere lamp is improved and the lifetime of usage of the LED torchiere lamp is extended, thereby having the practicality.
it is to be understood that the above description and drawings are only used for illustrating some embodiments of the present invention, not intended to limit the scope thereof. Any variation and deviation from the above description and drawings should be included in the scope of the present invention.
First of all, the junctions VPPA, DN1A, DN2A, DN3A, DN4 of the high-voltage rectifying circuit are connected to the junctions VPPA, DN1A, DN2A, DN3A, DN4 of the LED lamp, and the junctions of the high-voltage rectifying circuit are connected to the IC drive circuit through the chip resistors (OR) J1¨J12 of the switching circuit, with the chip resistors being used for the jumper protection. The junction VPPA of the high-voltage rectifying circuit is connected to VPP1, VPP2, VPP3 of the 15th pin of Ul, U2, U3 of IC through the chip resistors J1, J5, J9, and then a high-voltage power source is introduced, connecting DN1A to the 14th pin and the 17th pin of U1, U2, U3 of IC through the chip resistors (OR) J2, J6, J10, wherein the 14th pin and the 17th pin are DN11, DN21, DN31. DN2A is connected to the 13th pin and the 18th pin of U1, U2, U3 of IC through the chip resistors (OR) J3, J7, J11, wherein the 13th pin and the 18th pin are DN12, DN22, DN32. DN3A is connected to the 12th pin and the 19th pin of U1, U2, U3 of IC through the chip resistors (OR) J4, J8, J12, wherein the 12th pin and the 19th pin are DN13, DN23, DN33. Accordingly, the high-voltage rectifying circuit can be connected to the IC drive circuit.
There can be one or plural IC drive circuits depending upon the quantity of the loaded chip LED lamps. The IC drive circuit is built in with an electronic switching circuit required for driving the LED lamp, an analog light dimmer circuit and a PWM light dimmer circuit, in addition to an overheat and overvoltage protection circuit which is connected externally to R1, R2 for modulating the IC output current and to Cl for providing a stable filtering wave as supply power to IC. Constant current is provided to the LED lamp through the high-voltage rectifying current and the IC
drive circuit. When the temperature of the LED lamp exceeds a temperature setting of 85-95 C, the overheat and overvoltage protection circuit starts to drop the voltage and decrease the current to cool down and reduce the brightness of the LED lamp. Therefore, the safety of the LED torchiere lamp is improved and the lifetime of usage of the LED
torchiere lamp is extended, thereby having the practicality.
In another aspect of the present invention, there is provided an LED
torchiere lamp with overheat and overvoltage protection functions, wherein the overvoltage detection input terminal VCH at the 1st pin, the overheat protection input terminal TS at the 6th pin, the analog light dimmer signal input terminal VDIM at the 9th pin, the PWM light dimmer signal input terminal at the 10th pin, and the single-wired electronic switch power-harvesting current control input terminal VPP_ID at the le pin, disposed on the IC drive circuit, can be optionally connected or disconnected according to the required function, thereby facilitating the versatility of the present invention.
In'sttill another aspect of the present invention, there is provided an LED torchiere lamp with overheat and overvoltage protection functions, wherein all the circuits and elements of the high-voltage rectifying circuit and the IC drive circuit are installed on a single PCB (Printed Circuit Board) which is disposed on a top of the torchiere lamp to reduce the area of installation.
To enable a further understanding of the said aspects and the technological methods of the invention herein, the brief description of the drawings below is followed by the detailed description of the preferred embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a schematic view of a prior art.
FIG. 2 shows a simple schematic view of the present invention.
FIG. 3 shows a schematic view of a high-voltage rectifying circuit of the present invention.
FIG. 4 shows a schematic view of a switching circuit of the present invention.
FIG. 5 shows a schematic view of pins of an IC drive circuit of the present invention.
FIG. 6 shows a schematic view of the connection of an LED lamp at a load end of the present invention.
FIG. 7 shows a schematic view of installation of circuits and elements of the present invention.
FIG. 8 shows a partially enlarged schematic view of the installation of circuits and elements of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to FIGS. 2-8, the present invention discloses an LED
torchiere lamp with overheat and overvoltage protection functions, and more particularly to an LED torchiere lamp which includes a high-voltage input power source combining with an IC drive circuit without using a transformer and an electrolytic capacitor (as shown in FIG. 2), and which is driven by constant current. The present invention comprises primarily a high-voltage rectifying circuit 1 which rectifies high-voltage alternating current as high-voltage direct current. The functions of major elements of the high-voltage rectifying circuit 1 are described below:
1. Fl ¨ a fuse (250/1A) 110, which permits automatic shut-off to protect the circuit when a subsequent circuit is short-circuited;
2. R7 and R8 ¨ two chip resistors (22R) 120, which are used for surge (current) protection;
3. RV1 ¨ a varistor 130, which prevents the circuit from showing all kinds of transient voltage and absorbs the surge current;
4. D1 ¨ a chip bridge 140, which rectifies an AC supply mains as DC voltage;
5. D2 ¨ a chip diode 150, which protects the lumped circuit from ESD;
6. D3, D4, D5, D6 four chip diodes 150, which protect each LED
from ESD;
7. R1, R2, R3, R4, R5, R6 ¨ six chip resistors (15R) 160, which modulate the current value at the IC output terminal;
8. Cl, 02, C3 ¨ three chip capacitors 170, which are used as the filter capacitors at the IC supply terminal.
The pin numbers and names of the IC drive circuit of the present invention are described belcw:
1. VCH an overvoltage detection input terminal, 2. VSSA a common, 3. CS1 connecting to a current sensing resistor 1;
4. VSSB a ground, 5. REG5 a power source at 5V, 6. TS an overheat protection input terminal, 7. VSSB a ground, 8. CS2 connecting to a current sensing resistor 2, 9. VDIM an analog light dimmer signal input terminal, 10. PWM a PWM light dimmer signal input terminal, 11. DN8 a channel 8, 12. DN7 a channel 7, 13. DN6 a channel 6, 14. DN5 a channel 5, =
15. VPP a high-voltage power source, 16. VPP ID a single-wired electronic switch power-harvesting current control terminal, 17. DN1 a channel 1, 18. 0N2 a channel 2, 19. DN3 a channel 3, 20. DN4 a channel 4.
First of all, referring to FIGS. 3-6, the junctions VPPA, DN1A, DN2A, DN3A, DN4 of the high-voltage rectifying circuit 1 in FIG. 3 are connected to the junctions VPPA, DN1A, DN2A, DN3A, DN4 of the LED lamp 3 in FIG. 6, and the junctions of the high-voltage rectifying circuit 1 are connected to the IC drive circuit 2 through the chip resistors 18 (OR) J1-J12 of the switching circuit, with the chip resistors 18 being used for the jumper protection. The junction VPPA of the high-voltage rectifying circuit 1 is connected to VPP1, VPP2, VPP3 of the 15th pin of U1, U2, U3 of IC drive circuit 2 through the chip resistors 18 J1, J5, J9, and then a high-voltage power source is introduced, connecting DN1Ato the 14th pin and the 17th pin of Ul, U2, U3 of IC drive circuit 2 through the chip resistors 18 (OR) J2, J6, J10, wherein the 14th pin and the 17th pin are DN11, DN21, DN31. DN2A is connected to the 13th pin and the 18th pin of Ul, U2, U3 of IC drive circuit 2 through the chip resistors 18 (OR) J3, J7, J11, wherein the 13th pin and the 18th pin are DN12, DN22, DN32. DN3A
is connected to the 12th pin and the 19th pin of Ul, U2, U3 of IC drive circuit 2 through the chip resistors 18 (OR) J4, J8, J12, wherein the 12th pin and the 19th pin are DN13, DN23, DN33. Accordingly, the high-voltage rectifying circuit 1 can be connected to the IC drive circuit 2.
There can be one or plural IC drive circuits 2 depending upon the quantity of the loaded chip LED lamps 3. The IC drive circuit 2 is built in with an electronic switching circuit required for driving the LED lamp 3, an analog light dimmer circuit and a PWM light dimmer circuit, in addition to an overheat and overvoltage protection circuit which is connected externally to R1, R2 for modulating the IC output current and to Cl for providing a stable filtering wave as supply power to IC drive circuit 2. Constant current is provided to the LED lamp 3 through the high-voltage rectifying current 1 and the IC drive circuit 2. When the temperature of the LED
lamp 3 exceeds a temperature setting of 85-95 C, the overheat and overvoltage protection circuit starts to drop the voltage and decrease the current to cool down and reduce the brightness of the LED lamp 3.
Therefore, the safety of the LED torchiere lamp is improved and the lifetime of usage of the LED torchiere lamp is extended, thereby having the practicality.
Another embodiment of the present invention is to provide an LED
torchiere lamp with overheat and overvoltage protection functions, wherein the overvoltage detection input terminal VCH at the lst pin, the overheat protection input terminal TS at the 6th pin, the analog light dimmer signal input terminal VDI1V1 at the 9th pin, the PWM light dimmer signal input terminal at the 10th pin, and the single-wired electronic switch power-harvesting current control input terminal VPP_ID at the 16th pin, disposed on the IC drive circuit 2, can be optionally connected or disconnected according to the required function, thereby facilitating the versatility of the present invention.
Still another embodiment of the present invention is to provide an LED torchiere lamp with overheat and overvoltage protection functions, wherein all the circuits and elements of the high-voltage rectifying circuit and the IC drive circuit are installed on a single PCB (Printed Circuit Board) 4 (as shown in FIG. 7 and FIG. 8) which is disposed on a top of the torchiere lamp to reduce the area of installation.
By connecting the high-voltage rectifying circuit 1 with the IC drive circuit 2, constant current is provided to the LED lamp 3 without using the conventional transformer or electrolytic capacitor, and with the overhead and overvoltage protection functions. Accordingly, the safety of the LED
torchiere lamp is improved and the lifetime of usage of the LED torchiere lamp is extended, thereby having the practicality.
it is to be understood that the above description and drawings are only used for illustrating some embodiments of the present invention, not intended to limit the scope thereof. Any variation and deviation from the above description and drawings should be included in the scope of the present invention.
Claims (5)
1. An Light Emitting Diode (LED) torchiere lamp with overheat and overvoltage protection functions, comprising:
a high-voltage rectifying circuit, wherein the high-voltage rectifying circuit rectifies high-voltage alternating current as high-voltage direct current;
an Integrated Circuit (IC) drive circuit, wherein one or plural IC drive circuits is configured depending upon a quantity of a loaded chip LED
lamps; and an overheat and overvoltage protection circuit, wherein the overheat and overvoltage protection circuit starts to drop voltage and decrease current when temperature of the LED lamp exceeds temperature setting, thereby cooling down the LED lamp to reduce brightness;
by connecting the high-voltage rectifying current with the IC drive circuit, constant current being provided to the LED lamp without using a conventional transformer or an electrolytic capacitor and with the overheat and overvoltage protection functions, which improves the safety and extends the lifetime of usage of the LED torchiere lamp, thereby having the practicality.
a high-voltage rectifying circuit, wherein the high-voltage rectifying circuit rectifies high-voltage alternating current as high-voltage direct current;
an Integrated Circuit (IC) drive circuit, wherein one or plural IC drive circuits is configured depending upon a quantity of a loaded chip LED
lamps; and an overheat and overvoltage protection circuit, wherein the overheat and overvoltage protection circuit starts to drop voltage and decrease current when temperature of the LED lamp exceeds temperature setting, thereby cooling down the LED lamp to reduce brightness;
by connecting the high-voltage rectifying current with the IC drive circuit, constant current being provided to the LED lamp without using a conventional transformer or an electrolytic capacitor and with the overheat and overvoltage protection functions, which improves the safety and extends the lifetime of usage of the LED torchiere lamp, thereby having the practicality.
2. The Light Emitting Diode (LED) torchiere lamp with overheat and overvoltage protection functions, according to claim 1, wherein the IC
drive circuit is built in with an electronic switching circuit, an analog light dimmer circuit, a Pulse Width Modulation (PWM) light dimmer circuit and an overheat and overvoltage protection circuit.
drive circuit is built in with an electronic switching circuit, an analog light dimmer circuit, a Pulse Width Modulation (PWM) light dimmer circuit and an overheat and overvoltage protection circuit.
3. The Light Emitting Diode (LED) torchiere lamp with overheat and overvoltage protection functions, according to claim 1, wherein VCH
overvoltage detection input terminal, TS overheat protection input terminal, VDIM analog light dimmer signal input terminal, PWM light dimmer signal input terminal, and VPP_ID single-wired electronic switch power-harvesting current control input terminal are optionally connected or disconnected according to required functions.
overvoltage detection input terminal, TS overheat protection input terminal, VDIM analog light dimmer signal input terminal, PWM light dimmer signal input terminal, and VPP_ID single-wired electronic switch power-harvesting current control input terminal are optionally connected or disconnected according to required functions.
4. The Light Emitting Diode (LED) torchiere lamp with overheat and overvoltage protection functions, according to claim 1, wherein all the circuits and elements of the high-voltage rectifying current and the IC
drive circuit are installed on a single PCB (Printed Circuit Board) which is disposed on a top of the torchiere lamp.
drive circuit are installed on a single PCB (Printed Circuit Board) which is disposed on a top of the torchiere lamp.
5. The Light Emitting Diode (LED) torchiere lamp with overheat and overvoltage protection functions, according to claim 1, wherein the overheat and overvoltage protection circuit starts to drop the voltage and decrease the current when the temperature of the LED lamp exceeds temperature setting of 85-95°C, which cools down the LED
lamp to reduce the brightness, thereby improving the safety of the LED torchiere lamp.
lamp to reduce the brightness, thereby improving the safety of the LED torchiere lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2886969A CA2886969C (en) | 2015-04-01 | 2015-04-01 | Light emitting diode (led) torchiere lamp with overheat and overvoltage protection functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2886969A CA2886969C (en) | 2015-04-01 | 2015-04-01 | Light emitting diode (led) torchiere lamp with overheat and overvoltage protection functions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2886969A1 true CA2886969A1 (en) | 2016-10-01 |
| CA2886969C CA2886969C (en) | 2018-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2886969A Expired - Fee Related CA2886969C (en) | 2015-04-01 | 2015-04-01 | Light emitting diode (led) torchiere lamp with overheat and overvoltage protection functions |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109302773A (en) * | 2018-11-15 | 2019-02-01 | 常州格林照明股份有限公司 | A kind of LED projector lamp driving circuit |
-
2015
- 2015-04-01 CA CA2886969A patent/CA2886969C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109302773A (en) * | 2018-11-15 | 2019-02-01 | 常州格林照明股份有限公司 | A kind of LED projector lamp driving circuit |
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| Publication number | Publication date |
|---|---|
| CA2886969C (en) | 2018-09-25 |
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