TW201603632A - Power source self-adaptive LED lamp - Google Patents

Abstract

The invention relates to a power source self-adaptive LED lamp. More than two LED lamp strings are mutually connected through a cascaded/parallel connection switching circuit. The cascaded/parallel connection switching circuit is connected to a power source circuit through a voltage detection circuit, and is connected to a constant current driving module, wherein the power source circuit provides four power source contacts to form two sets of power source input ends so that a user selects any two power source contacts to connect the power source, and the input power source voltage is detected by the voltage detection circuit so that each LED lamp string is switched as cascaded or parallel connection to match the input power source voltage. The LED lamp string is further driven by the constant current driving module to light up. The LED lamp has benefits of convenient installation and reducing usage risk by using the foregoing design.

Description

Power adaptive light-emitting diode lamp

The invention relates to a light-emitting diode lamp, in particular to a power supply adaptive light-emitting diode lamp with a variable series-parallel module to be compatible with full voltage input and without installation direction limitation.

With the rise of energy conservation, carbon reduction and environmental awareness in recent years, large-scale public buildings around the world, such as highway lighting, traffic signs, and large billboards, have gradually switched to light-emitting diode components with better luminous efficiency to replace the original incandescent. Light bulbs and fluorescent tubes not only have a long service life, but also have better luminous efficiency, so as to save energy and expenses for maintenance of lighting, and European and American countries have further developed an incandescent light bulb prohibition order, making the people's livelihood Applications such as home lighting, decorative lighting, festivals and other lighting equipment, and further toward the comprehensive light-emitting diode components, so the world's lighting manufacturers are committed to the development of light-emitting diode components.

The driving circuit structure of the prior art full-voltage LED lamp adopts the design of the switching power supply, and the circuit is complicated, bulky and high in cost. For consumers and manufacturers, the cost will be reflected in the light-emitting diode. The price of the body lamp. The driving circuit structure of the prior art single-voltage LED lamp adopts the design of a linear power source, and the circuit is simple, small in size and low in cost, but as the name suggests, it can only be used under the specific specific voltage condition for consumption. In addition, it is necessary to pay attention to the purchase. If you accidentally purchase the wrong specifications, it will not only waste money, but if you install it on the socket with the wrong voltage without knowing it, it may also cause danger in use. In terms of quotient, in order to cope with the current domestic power supply conditions of 110 volts and 220 volts, each of them needs to be manufactured in a certain amount to be stored, which not only increases the cost of production, but also increases the storage management expenditure. For consumers, the traditional lamp holder adopts the design of the starter. If the traditional lamp holder is to be equipped with the light-emitting diode lamp, the working principle of the light-emitting diode lamp is different from that of the traditional lamp tube. The electric direction has a limitation. Therefore, in general, the driver must manually remove the starter to avoid the burning of the LED lamp. However, if the method is obviously too complicated and inconvenient, it is necessary to design the circuit for the LED lamp. Further improvement.

In view of this, the main objective of the present invention is to provide a power adaptive light-emitting diode lamp, which can switch the series-parallel relationship of the internal light-emitting diode string according to the voltage of the input power source to automatically match the input power voltage and provide The power supply can be connected arbitrarily to suit different voltages and ensure safe use.

In order to achieve the above object, the main technical means adopted by the present invention is that the power adaptive light-emitting diode lamp comprises: two or more light-emitting diode strings; a series-parallel switching circuit, respectively Two or more light-emitting diode strings are connected; a voltage detecting circuit is connected to the serial-parallel switching circuit; a power circuit has a power output end and two sets of power input ends, and the power output ends are connected in series and parallel The switching circuit is connected to the two or more LED strings; the two sets of power input terminals are composed of four power contacts; the constant current driving module transmits the series-parallel switching circuit and two or more light-emitting diodes The pole light string is connected; wherein: the power circuit provides four power contacts to form two sets of power input terminals, for the user to select any two power contacts to connect the power; when the power is input, the voltage detection circuit detects the input power Voltage, so that each LED string is switched to be connected in series or in parallel to match the input power voltage, and then the LED is driven by the constant current driving module Lamp lighting string.

The invention has the advantages that the circuit has a circuit capable of detecting voltage, and is adapted to different inputs by converting electrical connection relationships between series or parallel LEDs of the plurality of LED strings in the LED lamp. Under the condition of voltage, the complex diode lamp beam can operate normally, so it has the characteristics that it can be used for different voltage power sources; and the circuit with linear power supply drive is simple, small in size and low in cost, and can not only Maintain low manufacturing costs, lower selling prices to benefit consumers, and manufacturers are less pressured to store storage space and manage expenses. The invention also adopts a special power circuit design, which can be installed on any compatible lamp holder by any two power contacts, and does not need to remove the starter of the traditional lamp holder, and has the advantages of convenient installation and reduced use risk.

The technical means adopted by the present invention for achieving the intended purpose of the invention are further described below in conjunction with the drawings and preferred embodiments of the invention.

Please refer to FIG. 1A , which is a circuit structural diagram of a preferred embodiment of a power adaptive light-emitting diode lamp according to the present invention, which includes a series of parallel control modules 10 electrically connected to a constant current driving module 20 . And the plurality of LED arrays 30, in this embodiment, having two LED arrays 30, the operating current of each of the LED strings 30 is I, and each of the LED strings 30 Providing a voltage drop of 70 volts; and the series-parallel control module 10, the constant current driving module 20, and the two-lighting diode string 30 are electrically connected to a power source VCC, and the power source VCC is supplied by a power circuit. In this embodiment, the power supply circuit has two rectifiers 40, and each of the rectifiers 40 is a bridge rectifier.

1B is a plan view showing a preferred embodiment of a power adaptive light-emitting diode lamp according to the present invention, which includes a lamp tube 50 and two sets of power input terminals. In this embodiment, two The power input end of the group is a two-electric plug 60, the lamp tube 50 houses the series-parallel control module 10, the constant current driving module 20, the two-light diode string 30 and the two rectifiers 40; The plugs 60 are disposed at the two ends of the lamp tube 50, and the electrical plugs 60 are electrically connected to one of the rectifiers 40. In this embodiment, the outer pins of the electrical plugs 60 are provided with two pins 61, one of which is The two pins 61 are the pin P1 and the pin P2, respectively, and the other two pins 61 are the pin P3 and the pin P4, respectively.

Please refer to FIG. 2 , which is a circuit structural diagram of a series-parallel control module 10 and a constant current driving module 20 according to a preferred embodiment of the power adaptive light-emitting diode lamp of the present invention. The series-parallel control module 10 includes a voltage detecting circuit 11, a series-parallel switching circuit 12, and a current feedback circuit 13. The input end of the voltage detecting circuit 11 is electrically connected to a power output terminal. In an embodiment, the power output end is a VCC end, and is electrically connected to the two rectifiers 40 and the two LED strings 30; the series-parallel switching circuit 12 is electrically connected to the voltage detecting circuit 11 and the current back. Grant circuit 13. The constant current driving module 20 has an integrated circuit 21. In the embodiment, the integrated circuit 21 is a high voltage light emitting diode driving IC of the type AT7315.

The voltage detecting circuit 11 includes a voltage dividing circuit 110, a gate electrode 111 and a transistor 112. The transistor 112 is electrically connected to the voltage dividing circuit 110 and the gate electrode. 111, and control and output a detection circuit signal. In this embodiment, the voltage dividing circuit 110 converts the VCC terminal voltage to 10% of the original voltage and electrically connects the gate of the transistor 112. The Zener diode 111 provides a stable voltage of 13 volts. The source of the transistor 112 is electrically connected, and the VCC terminal is electrically connected to the drain of the transistor 112.

The series-parallel switching circuit 12 has a plurality of diodes and a plurality of transistors, and the plurality of transistors are matched with the plurality of diodes to perform a series-parallel combination between the two-light-emitting diode strings 30. In this embodiment, the plurality of diodes are respectively a diode 120A, a diode 120B, and a diode 120C; and the plurality of transistors are a transistor 121A and a transistor 121B, respectively. The gate of the transistor 121A is electrically connected to the drain of the detecting circuit transistor 112 and the VCC terminal for receiving the detecting circuit signal, and the drain of the transistor 121A is electrically connected to the VCC terminal. The source of the transistor 121A is electrically connected to the diode 120A. The gate of the transistor 121B is electrically connected to the source of the transistor 121A for receiving the detection circuit signal. The gate of the transistor 121B is electrically connected to the diode 120B and one of the LEDs. The body light string 30, the source of the transistor 121B is electrically connected to the diode 120C, and the diode 120C is electrically connected to the integrated circuit 21 and the other light-emitting diode string 30, in this embodiment. The diode 120C is electrically connected to an OUT terminal 210 of the integrated circuit 21, and the OUT terminal 210 is used to maintain a stable output current.

The current feedback circuit 13 has a plurality of current limiting resistors and at least one transistor 131. In this embodiment, the plurality of current limiting resistors are a current limiting resistor 130A and a current limiting resistor 130B, respectively, the current limiting resistor 130A and the current limiting current. One end of each of the resistors 130B is electrically connected to an Iset end 211 of the integrated circuit 21, and the other end forms a ground end. The Iset end 211 is used to sense the current of the feedback circuit 13. In this embodiment, the transistor 131 is a transistor 131, which is disposed at the ground end of the current limiting resistor 130B. The transistor 131 is used to control whether one of the current limiting resistors is turned on to the ground. The source of the transistor 121A is electrically connected to receive the detecting circuit signal. The drain of the transistor 131 is electrically connected to the current limiting resistor 130B. The source of the transistor 131 is electrically connected to the source. Ground terminal.

Referring to FIG. 3A and FIG. 3B, when the present invention is used, if the pin P1 and the pin P4 are taken as an example, whether the pin P1 is an input terminal and the pin P4 is an output terminal, or The pin P1 is the output terminal and the pin P4 is the input terminal. Under the action of the two rectifiers 40, there is no problem. Thereby, the combination of the pin P1 and the pin P4 can be arbitrarily replaced with other combinations, and the six kinds of connections in the following table can be established:

Referring to FIG. 2, when the voltage of the VCC terminal of the output two rectifier 40 is 100 volts, the gate voltage of the transistor 112 is 10 volts after the voltage dividing circuit 110 converts the VCC terminal. The source voltage of the transistor 112 is 13 volts of the stable output of the arrester diode 111. At this time, the gate voltage of the transistor 112 is 10 volts less than the source voltage of 13 volts, so the source of the transistor 112 The gate is in a non-conducting state, and the detection circuit signal is 100 volts at the VCC end. The gate voltage of the transistor 121A is 100 volts of the detection circuit signal, and the gate voltage of the transistor 121A is 100 volts. At this time, the gate voltage of the transistor 121A is 100 volts equal to 100 volts of the drain voltage. The source of the transistor 121A is in a conducting state with the drain. The gate voltage of the transistor 121B is 100 volts of the detection circuit signal, and the gate voltage of the transistor 121B is 30 volts minus the 70 volt drop of the 70 volt drop of one of the LED strings 30. At this time, the gate voltage of the transistor 121B is 100 volts larger than the gate voltage of 30 volts, so that the source and the drain of the transistor 121B are in a conducting state. The gate voltage of the transistor 131 is 100 volts of the detection circuit signal. In this embodiment, the gate voltage of the transistor 131 is 30 volts set by the Iset terminal 211, and the current limiting resistor 130A and the limit. The current of the current resistance 130B when the ground is turned on is I; at this time, the gate voltage of the transistor 131 is 100 volts larger than the gate voltage of 30 volts, so the source and the drain of the transistor 131 are turned on, so the limit The current resistor 130A and the current limiting resistor 130B are both turned on.

When the transistor 121A, the transistor 121B, and the feedback circuit transistor 131 are both in an on state, the two LED strings 30 are electrically connected in parallel, and the current demand is 2I. The current limiting resistor 130A and the current limiting resistor 130B are both turned on, so the current sensed by the Iset terminal is 2I, so the OUT terminal 210 can maintain a stable 2I current and the two LED strings 30 are normal. Operation.

When the present invention is used, if the voltage of the VCC terminal of the output two rectifier 40 is 200 volts, the gate voltage of the transistor 112 is 20 volts after the voltage dividing circuit 110 converts the VCC terminal, and the source of the transistor 112 The pole voltage is 13 volts of the stable output of the Zener diode 111. At this time, the gate voltage of the transistor 112 is 20 volts greater than the source voltage of 13 volts, so that the source and the drain of the transistor 112 are in a conducting state. At this time, the detection circuit signal is 13 volts of the stable output of the ensemble diode 111. The gate voltage of the transistor 121A is 13 volts of the detection circuit signal, and the gate voltage of the transistor 121A is 200 volts. At this time, the gate voltage of the transistor 121A is 13 volts less than the gate voltage of 200 volts. The source and the drain of the transistor 121A are in a non-conducting state. The gate voltage of the transistor 121B is 13 volts of the detection circuit signal, and the gate voltage of the transistor 121B is 130 volts minus 130 volts after a voltage drop of 70 volts of one of the LED strings 30 At this time, the gate voltage of the transistor 121B is 13 volts less than the gate voltage of 130 volts, so that the source and the drain of the transistor 121B are in a non-conducting state. The gate voltage of the transistor 131 is 13 volts of the detection circuit signal. In this embodiment, the gate voltage of the transistor 131 is 30 volts set by the Iset terminal 211, and the current limiting resistor 130A and the limit The current of the current resistance 130B when conducting to ground is I; at this time, the gate voltage of the transistor 131 is 13 volts less than the gate voltage of 30 volts, so the source and the drain of the transistor 131 are not conductive, so The current limiting resistor 130A is turned on to ground, but the current limiting resistor 130B is not turned on to ground.

When the transistor 121A, the transistor 121B, and the feedback circuit transistor 131 are in a non-conducting state, the two LED strings 30 are electrically connected in series, and the current demand is I. When the series form is formed, the gate voltage of the transistor 121B is half of VCC, that is, 100 volts according to the principle of series voltage division. At this time, the gate voltage 13 of the transistor 121B is still less than 100 volts of the drain voltage, so the second light emitting diode The body light string 30 is maintained in series. At this time, the current limiting resistor 130A is turned on to the ground, but the current limiting resistor 130B is not turned on to the ground. Therefore, the current sensed by the Iset terminal 211 is I, so the OUT terminal 210 can maintain a stable I current and make the second The light-emitting diode string 30 operates normally.

Therefore, as shown in FIG. 5, the present invention has a voltage detecting circuit 11 and converts the electrical connection relationship between the two LED strings 30 in series or in parallel by the series-parallel switching circuit 12, and The current feedback circuit 13 and the integrated circuit component 21 are adapted to adjust the current value of the two LED strings 30 under different input voltage conditions, so that the two LED strings 30 can operate normally. . Therefore, it has the characteristics that the switching power supply driving circuit can be used for the complex input voltage; and the circuit with the linear power supply driving is simple, small in size and low in cost, not only can maintain low manufacturing cost, but also lower the selling price to benefit Consumers, and manufacturers are also less pressured to store storage space and manage expenses. The invention also adopts the design of the two rectifiers 40, which can be installed in any compatible lamp holder in any direction, and does not need to remove the starting device of the traditional lamp holder, and has the advantages of convenient installation and reduced use risk.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention. A person skilled in the art can make some modifications or modifications to equivalent embodiments by using the above-disclosed technical contents without departing from the technical scope of the present invention. It is still within the scope of the technical solution of the present invention to make any simple modifications, equivalent changes and modifications to the above embodiments.

10‧‧‧Serial and parallel control module
11‧‧‧Voltage detection circuit
110‧‧‧voltage circuit
111‧‧‧Jenner diode
112‧‧‧Optoelectronics
12‧‧‧ series-parallel switching circuit
120A, 120B, 120C‧‧‧ diode
121A, 121B‧‧‧Switching transistor
13‧‧‧ Current feedback circuit
130A, 130B‧‧‧ Current limiting resistor
131‧‧‧Optoelectronics
20‧‧‧Constant current drive module
21‧‧‧Integrated circuit components
210‧‧‧OUT
211‧‧‧Iset
30‧‧‧Lighting diode string
40‧‧‧Rectifier
50‧‧‧ lamp
60‧‧‧Electric plug
61‧‧‧ stitches

1A is a circuit structural diagram of a preferred embodiment of a power adaptive light-emitting diode lamp of the present invention. FIG. 1B is a plan view showing a preferred embodiment of a power adaptive light-emitting diode lamp according to the present invention. 2 is a circuit structural diagram of a series-parallel control module and a constant current driving module according to a preferred embodiment of the power adaptive light-emitting diode lamp of the present invention. 3A to 3B are schematic diagrams showing the operation of a rectifier of a preferred embodiment of a power adaptive light-emitting diode lamp according to the present invention. 4 is a circuit block diagram of a preferred embodiment of a power adaptive light-emitting diode lamp of the present invention.

10‧‧‧Serial and parallel control module

20‧‧‧Constant current drive module

30‧‧‧Lighting diode string

40‧‧‧Rectifier

Claims (5)

A power adaptive light-emitting diode lamp comprising: two or more light-emitting diode strings; a series-parallel switching circuit respectively connected to the two or more light-emitting diode strings; The circuit is connected to the serial-parallel switching circuit; a power supply circuit has a power output end and two sets of power input ends, and the power output end is connected to the two or more LED strings through a series-parallel switching circuit The two sets of power input terminals are composed of four power contacts; the constant current drive module is connected to two or more LED strings through the series-parallel switching circuit; wherein: the power circuit provides four power sources The contacts form two sets of power input terminals for the user to select any two power contacts to connect to the power supply; when the power is input, the voltage detection circuit detects the input power voltage, so that the LED strings are switched to series or parallel. Connected to match the input power supply voltage, and then the light-emitting diode string is illuminated by the constant current driving module. The power adaptive light-emitting diode lamp of claim 1, wherein the series-parallel switching circuit is electrically connected to the power output end, and has a plurality of diodes and a plurality of transistors, a plurality of transistors and a complex The diodes are matched to perform a series-parallel combination between the complex LED strings. The power adaptive light-emitting diode lamp of claim 2, wherein the voltage detecting circuit comprises a voltage dividing circuit, a quenching diode and a transistor, wherein the electro-crystalline system is electrically connected The voltage dividing circuit and the semiconductor diode control and output a detecting circuit signal to the plurality of transistors. The power adaptive light-emitting diode lamp of claim 3, wherein the current feedback circuit has a plurality of current limiting resistors and at least one transistor, and one end of the plurality of current limiting resistors is electrically connected to the integrated circuit The other end forms a grounding end; the electro-crystalline system receives the detecting circuit signal to control the parallel number of the complex resistance to ground. The power adaptive light-emitting diode lamp according to any one of claims 1 to 4, further comprising a lamp tube and two electric plugs, wherein the two electric plugs are disposed on two axial sides of the lamp tube, and each The electrical plug is electrically connected to one of the rectifiers, and each of the rectifiers is electrically connected to one of the power input terminals.