JP3162261U - LED lamp brightness adjustment circuit connectable to AC power and LED lighting device using the same - Google Patents

Abstract

The present invention relates to an LED lamp brightness adjustment circuit that can be connected to AC power, and an LED lighting device that uses the brightness adjustment circuit. . An LED lamp brightness adjustment circuit includes an adjustment circuit, a plurality of rectifier diodes, and a plurality of filtering capacitors. Each filtering capacitor can be connected in parallel with the LED module. The LED lamp brightness adjustment circuit is connected to the output electrode of the light regulator. Based on the control of the light regulator, the regulation circuit generates a regulated AC input voltage. The positive and negative half-cycle regulated AC input voltages are rectified and filtered to drive separate corresponding LED modules. Therefore, the amplitude of the drive voltage of the LED module is controlled to adjust the brightness of the light emission. [Selection] Figure 1

Description

  The present invention relates to an LED lamp brightness adjustment circuit that can be connected to AC power and an LED lighting device that uses the brightness adjustment circuit, and more particularly to a brightness adjustment circuit that enables a light controller to change the brightness of an LED lamp.

  Light adjustable lamps are often used to provide a relaxed atmosphere. Referring to FIG. 2, the conventional light adjustable lamp mainly includes an incandescent lamp 101 and a light regulator 102 connected in series. The light modulator 102 comprises silicon control elements such as DIAC (AC diode) and TRAIAC (AC triode). By changing the trigger voltage applied to the silicon control element, the conduction angle of the silicon control element controls the AC voltage passing through the incandescent lamp 101, thereby adjusting the brightness of the incandescent lamp 101 to a desired level. Adjusted accordingly.

  LED-based lamps are increasingly used as lighting devices and are replacing conventional incandescent lamps for the purpose of conserving energy and reducing power consumption. Although the LED-based lamp is driven with a low DC voltage, the light regulator 102 cannot directly adjust the DC voltage and cannot adjust the brightness of the LED-based lamp. Therefore, the user must use a specific adjuster instead of the existing light adjuster and almost give up all the original associated control circuits.

  In order to overcome that drawback, the present invention provides an LED lamp brightness adjustment circuit that can be connected to AC power so as to reduce or eliminate the above problems.

  The main object of the present invention is to provide an LED lamp brightness adjustment circuit including a brightness adjustment circuit in which the light regulator changes the brightness of the LED lamp.

  In order to achieve the object, the LED lamp brightness adjustment circuit includes an adjustment circuit, a plurality of rectifier diodes, and a plurality of filtering capacitors. Each filtering capacitor can be connected in parallel with the LED module. The LED lamp brightness adjustment circuit is connected to an output electrode of a light regulator that receives an AC voltage. Since the light regulator adjusts the amplitude of the AC voltage, the adjustment circuit generates a regulated AC input. Further, the regulated positive or negative half-cycle AC input voltage is rectified and filtered to drive separate corresponding LED modules. Since the amplitude of the driving voltage of the LED module is adjusted, the brightness of the light emission can be changed according to the user's request.

  Other objects, advantages and novel features of the present invention will become apparent from the following detailed description when taken in conjunction with the accompanying drawings.

It is a circuit diagram of the LED lamp brightness adjustment circuit connected to alternating current power according to this invention. It is a circuit diagram of the conventional light quantity adjustable lamp.

  Referring to FIG. 1, an LED lamp brightness adjustment circuit according to the present invention is operated by a light regulator 102, and also includes a regulator circuit 10, a first rectifier diode D1, a second rectifier diode D2, and a first filtering capacitor C1. , A second filtering capacitor C2 and a current limiting resistor R4. The light regulator 102 has an input electrode connected to the first AC input electrode AC1 of the AC power supply.

  The adjustment circuit 10 includes a first electrode and a second electrode, and includes a plurality of resistors R1 to R3 connected in parallel. The first electrode is coupled to the output electrode of the light regulator 102. The second electrode is coupled to a second AC input electrode AC2 of the AC power source. Optional fuse F1 is connected between regulator 102 and regulator circuit 10 to prevent overcurrent. The resistors R1 to R3 of the adjustment circuit 10 in this embodiment have the same resistance value. The regulation circuit 10 enables the light regulator 102 to linearly regulate the alternating voltage and to generate a regulated input voltage Vin that passes through the first and second electrodes.

  The first rectifying diode D1 has an anode and a cathode, the anode is connected to the first electrode of the adjusting circuit 10, and the cathode is connected to the first filtering capacitor C1.

  The first filtering capacitor C1 has a positive electrode and a negative electrode. The positive electrode is connected to the cathode of the first rectifier diode D1. The current limiting resistor R4 is connected between the second electrode of the adjustment circuit 10 and the negative electrode of the first filtering capacitor C1. The first filtering capacitor C1 is connected in parallel with the first LED module 20 including the plurality of light emitting diodes LED1 to LED40 connected in series. The first LED module 20 has a positive input connected corresponding to the positive electrode of the first filtering capacitor C1 and a negative input connected corresponding to the negative electrode of the first filtering capacitor C1.

  The second rectifier diode D2 has an anode and a cathode. The anode is connected to the second AC input electrode AC2 through the current control resistor R4, and the cathode is connected to the second filtering capacitor C2. ing.

  The second filtering capacitor C2 has a positive electrode and a negative electrode. The positive electrode is connected to the cathode of the second rectifier diode D2. The negative electrode is connected to the first electrode of the adjustment circuit 10 and the anode of the rectifier diode D1. The second filtering capacitor C2 can be connected in parallel with the second LED module 30 including the plurality of emitting diodes LED41 to LED80 connected in series. The second LED module 30 has a positive input connected corresponding to the positive electrode of the second filtering capacitor and a negative input connected corresponding to the negative electrode of the second filtering capacitor.

  Since the AC voltage is input from the two AC input electrodes AC1 and AC2, the light regulator 102 can adjust the amplitude of the AC voltage so as to adjust the adjusted input voltage Vin. Therefore, the driving voltage passing through the first and second filtering capacitors C1 and C2 changes. Since the first and second LED modules 20 and 30 are connected to the first and second filtering capacitors C1 and C2, respectively, the drive current flowing through the LED modules 20 and 30 is changed to adjust the lightness of light emission. Is done. When the AC voltage is a positive half cycle, the positive half cycle voltage passes through the first rectifier diode D1 and provides a first drive voltage to activate the first LED module 20. Is filtered by the filtering capacitor C1. When the AC voltage is a negative half cycle, the negative half cycle voltage passes through the second rectifier diode D2 and a second filtering capacitor to provide a second drive voltage that activates the LED module 30. Filtered by C2. The first rectification drive voltage and the second rectification drive voltage are generated alternately.

  The brightness adjustment circuit of the present invention enables the light regulator 102 to adjust the amplitude of the received AC voltage and generate the adjusted input voltage Vin. The positive or negative half-cycle input voltage Vin is further rectified by rectifier diodes D1 and D2 and filtering capacitors C1 and C2 to drive the LED modules 20, 30 and to change the brightness of the LED modules 20, 30. And filtered.

  As previously mentioned, numerous features and advantages of the present invention are shown, along with details of the structure and function of the invention, but only examples are disclosed. Changes are made in the details of the adjustment of the shape, dimensions and components over the entire range indicated by the broad general meaning of the terms in the scope of the attached utility model registration, particularly within the scope of the principles of the invention.

10 regulator circuit 20 first LED module 30 second LED module 102 light regulator R1 first resistor R2 second resistor R3 third resistor R4 current limiting resistor D1 first rectifier diode D2 second rectifier diode C1 first filtering capacitor C2 second filtering capacitor F1 fuse

Claims (10)

An adjustment circuit having a first electrode connected to an output electrode of a light regulator and a second electrode connected to an AC power supply, and comprising a plurality of resistors connected in parallel, wherein the light regulation A regulating circuit for outputting a regulated input voltage having a desired amplitude according to the control of the device;
A first rectifier diode having a cathode and an anode connected to the first electrode of the conditioning circuit;
A first filtering capacitor having a positive electrode connected to the cathode of the first rectifier diode and a negative electrode connected to the second electrode of the regulator circuit;
A second rectifier diode having a cathode and an anode connected to the second electrode of the conditioning circuit;
A second filtering capacitor having a positive electrode connected to the cathode of the second rectifier diode and a negative electrode connected to the first electrode of the regulator circuit;
The first filtering capacitor can be connected in parallel with the first LED module;
The LED filtering brightness adjustment circuit, wherein the second filtering capacitor is connectable in parallel with the second LED module.   The LED lamp brightness adjustment circuit according to claim 1, wherein the plurality of resistors of the adjustment circuit have one and the same resistance value.   The LED lamp brightness adjustment circuit according to claim 1, further comprising a current limiting resistor connected between the second electrode of the adjustment circuit and the anode of the second rectifier diode.   4. The LED lamp brightness adjustment circuit according to claim 3, further comprising a fuse connected between the first electrode of the adjustment circuit and the light regulator. A first rectified drive voltage passing through the first rectifier capacitor drives the first LED module;
A second rectified drive voltage passing through the second rectifier capacitor drives the second LED module;
The LED lamp brightness adjustment circuit according to claim 1, wherein the first rectified drive voltage and the second rectified drive voltage are alternately generated. A light regulator having an input electrode connected to the first AC input electrode of the AC power source;
The first electrode connected to the output electrode of the light regulator and the second electrode connected to the second AC input electrode of the AC power supply, and a plurality of resistors connected in parallel An adjustment circuit that outputs a regulated input voltage having a desired amplitude in response to control of the light regulator;
A first rectifier diode having a cathode and an anode connected to the first electrode of the conditioning circuit;
A first filtering capacitor having a positive electrode connected to the cathode of the first rectifier diode and a negative electrode connected to the second electrode of the regulator circuit;
A first LED module connected in parallel with the first filtering capacitor;
A second rectifier diode having a cathode and an anode connected to the second electrode of the conditioning circuit;
A second filtering capacitor having a positive electrode connected to the cathode of the second rectifier diode and a negative electrode connected to the first electrode of the regulator circuit;
An LED lighting device comprising: a second LED module connected in parallel with the second filtering capacitor.   The LED lighting device according to claim 6, wherein the plurality of resistors of the adjustment circuit have one and the same resistance value.   The LED lighting device according to claim 6, further comprising a current limiting resistor connected between the second electrode of the adjustment circuit and the anode of the second rectifier circuit.   The LED lighting device according to claim 8, comprising a fuse connected between the first electrode of the adjustment circuit and the light regulator. A first rectified drive voltage passing through the first rectifier capacitor drives the first LED module;
A second rectified drive voltage passing through the second rectifier capacitor drives the second LED module;
The LED lighting device according to claim 6, wherein the first rectified drive voltage and the second rectified drive voltage are alternately generated.

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