Controller of an LED for receiving a remote control signal

This application claims priority to Chinese Patent Application No. 201720188682.2 with a filing date of Mar. 1, 2017. The content of the aforementioned applications, including any intervening amendments thereto, are incorporated herein by reference.

The invention relates to a controller of an LED for receiving a remote control signal.

A LED string light has a lighting decorative effect at night because of a variety of shapes and lights flashing, at the same time, it is also the first choice for people to add atmosphere. In order to enhance the decorative effect of the string light, a number of flash bubbles are arranged at regular intervals on the string light usually, to thereby make the entire string light with a flashing dynamic effect. The existing flash bubbles in the market, if which are directly in series on the string light, will lead to the entire light string flashing unsteadily, and will affect the normal lights of other light bodies, affect the beauty, and less than expected results. And the flashable bulbs device consumes a large current, while the current changes are also larger, affecting the safety.

At present, there are a variety of light-emitting mode for the LED lights, whose light-emitting modes are controlled by a drive circuit, however, the current drive circuit through a form of key switches to control it, in the intelligent era today, the control for the LED lights are more limited.

In view of the above technical problems, the object of the invention is to provide a controller of an LED for receiving a remote control signal, and the invention enables a user to have more choices for the operation of the controller.

The technical solutions which solve the above technical problems are as follows:

a controller of an LED for receiving a remote control signal, comprising a DC power source, further comprising: a remote control transmitter for issuing a control command by a user.

a remote control signal receiving module, for receiving a signal of the remote control transmitter, the remote control signal receiving module is electrically connected with the DC power source;

a control circuit, which is electrically connected with an output end of the remote control signal receiving module and of the DC power source respectively, and converts a command signal from the remote control signal receiving module into a switching signal output;

a drive circuit, which is connected to an output end of the DC power source and of the control circuit respectively, the drive circuit is turned on or turned off under a control signal of the control circuit to control that the DC power source outputs to a load.

The invention is characterized in that the invention can change the working state of the output signal of the control circuit at any time by the remote control transmitter or the key, thereby changing the switching changes of the driving circuit to change the flash changes of the LED string light. By pressing a timer button of the remote control transmitter or long pressing the key, the controller is switched into a timer mode and starts counting, after 6 hours (or 8 hours), the power is turned off and then the power is turned on again after 18 hours (or 16 hours), and so cycles. Therefore, the invention is based on the prior art, and a user can control the controller by manipulating the remote control, enabling the user to have more choices for the operation.

FIG. 1 is a block diagram of a controller of an LED for receiving a remote control signal;

FIG. 2 is a circuit schematic diagram of a first embodiment of the invention;

FIG. 3 is a circuit schematic diagram of a second embodiment of the invention;

FIG. 4 is a schematic diagram of the addition of short-circuit protection on the basis of FIG. 2 ;

FIG. 5 is a schematic diagram of the addition of short-circuit protection on the basis of FIG. 3 ;

FIGS. 6 and 7 are schematic views of two different modes of the connection which can be connected with an output end of the invention.

As described in FIG. 1 , a controller of an LED for receiving a remote control signal according to the invention, comprising: a DC power source; a remote control transmitter for issuing a control command by a users: a remote control signal receiving module, for receiving a signal of the remote control transmitter, the remote control signal receiving module is electrically connected with the DC power source; a control circuit, which is electrically connected with an output end of the remote control signal receiving module and of the DC power source respectively, and converts a command signal from the remote control signal receiving module into a switching signal output; a drive circuit, which is connected to an output end of the DC power source and of the control circuit respectively, the drive circuit is turned on or turned off under a control signal of the control circuit to control that the DC power source outputs to a load.

As shown in FIG. 2 , as a first embodiment of the above controller, wherein a type of a power control chip U 1 of the DC power source is CR6348, the DC power source is regulated by a zener diode ZD 1 via a twelfth resistor R 12 , and then is supplied to other circuits, the remaining structures of DC power source are similar to that of the patent of Patent Application No. CN201621232377.0. The remote control transmitter is provided with a plurality of keys for controlling that the LED lamps work under different conditions, the keys comprise a timing button, a button for adjusting the brightness, a button for lights flashing modes (the lights flashing modes are same as that of the Public No. CN203523098U, namely the lights flashing modes comprise: dimming, wave-like changes, happy style changes, single lamp dimmed, double lamps dimmed, stars twinkling, and always brightness, etc.). The structures of a bridge drive circuit are similar to that of FIG. 7 disclosed in the Public No. CN205179451U, so here do not repeat this. The control circuit comprises a microcontroller U 2 and a clock circuit composed of a crystal oscillator XL 1 , a twelfth capacitor C 12 and a thirteenth capacitor C 13 , both ends of the crystal oscillator XL 1 are connected with one end of the twelfth capacitor C 12 and of the thirteenth capacitor C 13 respectively, the other end of the twelfth capacitor C 12 and of the thirteenth capacitor C 12 is grounded, and both ends of the crystal oscillator XL 1 are connected with the microcontroller respectively, the type of the microcontroller U 2 is JT-042M, when the microcontroller receives a timing signal, such as of the remote control transmitter, the controller is switched into the working state, and the clock circuit provides a clock signal for the microcontroller, to guarantee accurate timing of the controller. The timing mode is that: long press the key for t seconds or the controller is switched into the timing mode by manipulating the timing button of the remote control transmitter, and start timer, and after T1 hours the power supply is off, then after T2 hours the power supply is on again, so cycles. The sum of T1 and T2 is 24 hours. T is 0-10 seconds, T1 is 0-24 hours, and T2 is 0-24 hours. For example, t is 3 seconds, T1 is 6 or 8 hours, and T2 is 18 or 16 hours. For the remote control signal receiving module in this embodiment. It is the infrared signal receiving circuit, which comprises an infrared receiving head U 3 and a nineteenth resistor R 19 , the infrared receiving head U 3 is connected with the control circuit, i.e., the infrared receiving head U 3 is connected with the microcontroller U 2 , the type of the infrared receiver U 3 is HBS838, and the infrared receiving head U 3 matches with the remote control transmitter. One end of the nineteenth resistor R 19 is electrically connected with an output end of the DC power supply, and the other end of the nineteenth resistor R 19 is electrically connected with the infrared receiving head U 3 . The infrared receiving head U 3 is installed in the controller, and the housing of the controller is made of material with good transparency of the infrared light. The controller is provided with a position indicator lamp LED 2 inside for the infrared receiving head U 3 , to remind the user a direction on which the infrared remote controller is needed to align. The position indicator lamp LED 2 for the infrared receiving head U 3 is connected with the fortieth resistor R 40 in series, and then one end is connected with the DC power supply, and the other end is grounded. For this example, it also comprises a key SW, whose one end is electrically connected with the control circuit, and the key SW is connected with the microcontroller U 2 , and the other end of the key SW is grounded.

The remote control signal receiving module is a radio frequency signal receiving circuit, as shown in FIG. 3 , the radio frequency signal receiving circuit comprises an antenna E 1 , a coupling circuit, and a third chip U 3 , a signal output end of the antenna E 1 is electrically connected with an input end of the coupling circuit, an output end of the coupling circuit is electrically connected with an input end of the third chip U 3 , and an output end of the third chip U 3 is electrically connected with the control circuit. The type of the third chip U 3 is WL490R. The coupling circuit comprises a fifth inductance L 5 , a sixth inductance L 6 , a thirty-fourth capacitance C 34 , and a thirty-fifth capacitance C 35 , an end of the sixth inductance L 6 is connected with the output end of the antenna E 1 , the other end of the sixth inductance L 6 is grounded, and the both ends of the thirty-fifth capacitance C 35 are connected with the both ends of the sixth inductance L 6 in parallel, one end of the thirty-fourth capacitance C 34 is connected with one end of the thirty-fifth capacitance C 35 , and the other end of the thirty-fourth capacitance C 34 is connected with one end of the fifth inductance L 5 , and the other end of the fifth inductance L 5 is grounded. An input end of the third chip U 3 is connected to the connection of the thirty-fourth capacitance C 34 and the fifth inductance L 5 . A high frequency modulation signal received by the antenna E 1 from the remote controller is provided to the third chip U 3 through the coupling circuit, and the high frequency modulation signal is demodulation processed by the third chip U 3 .

Preferably, the radio frequency signal receiving circuit also comprises a power supply filter circuit, one end of which is electrically connected with the third chip U 3 , and the other end of the power supply filter circuit is grounded. The power supply filter circuit comprises a thirty-second capacitance C 32 and a thirty-third capacitance C 33 , one end of the thirty-second capacitance C 32 and of the thirty-third capacitance C 33 is grounded, the other end of the thirty-second capacitance C 32 and the thirty-third capacitance C 33 is connected to a third pin of the third chip U 3 . The power supply filter circuit is used to filter the power supply inputted to the third chip U 3 .

Preferably, the radio frequency signal receiving circuit also comprises an automatic gain control circuit, one end of which is electrically connected with the third chip U 3 , and the other end of the automatic gain control circuit is grounded. The automatic gain control circuit comprises a thirtieth capacitance C 30 , one end of which is electrically connected with a seventh pin of the third chip U 3 , and the other end of the thirtieth capacitance C 30 is grounded. The thirtieth capacitance C 30 is used to reduce the control ripples of the automatic gain control circuit (AGC), to increase the dynamic range of the system.

Preferably, the radio frequency signal receiving circuit also comprises a threshold adjusting circuit, one end of which is electrically connected with the third chip U 3 , and the other end of the threshold adjusting circuit is grounded. The threshold adjustment circuit comprises a resistor arranged inside of the third chip U 3 and a thirty-first capacitance C 31 arranged outside of the third chip U 3 , a fourth pin is extending from inside of the third chip U 3 by the resistor and then is electrically connected with the thirty-first capacitance C 31 , and the other end of the thirty-first capacitance C 31 is grounded. Through the resistor and the thirty-first capacitance C 31 , extract the DC value of the demodulated signal, which is used to compare with the logical data, this comparison level threshold can be realized by regulating the thirty-first capacitance C 31 , in order to adapt to the different data rate.

Preferably, the radio frequency signal receiving circuit also comprises a crystal oscillator XL 2 , an end of which is electrically connected with an eighth pin of the third chip U 3 , the other end of the crystal oscillator XL 2 is grounded.

Except the remote control signal receiving module of this example is different from that of the example one, the remaining structures are same as that of the example one.

For the above two examples, as shown in FIGS. 4 and 5 , a short-circuit protection circuit is also provided in the circuit of FIGS. 4 and 5 , one end of the short-circuit protection circuit is electrically connected with the drive circuit 4 and the control circuit 3 respectively, the other end of the short-circuit protection circuit is grounded. The short-circuit protection circuit comprises a sampling resistor R 22 , through which sampling the signals on the driver circuit 4 , and the sampling signal is sent to the microcontroller U 2 , and thus judging whether there is a short circuit by the micro controller U 2 . In the circuit shown in FIGS. 4 and 5 , the type of the microcontroller U 2 is JT-042M.

The working process of the example one is as follows:

1. the DC power supply starts to work firstly after starting up, and then the DC voltage is built up on the fifth capacitance C 5 ;

2. the DC outputted by the DC power is supplied to the microcontroller U 2 and the infrared signal receiving circuit through the twelfth resistor R 12 , and then the microcontroller U 2 and the infrared signal receiving circuit start to work;

3. the operating state of the output signal of the microcontroller U 2 can be changed at any time through the key SW or the infrared remote control transmitter, thus changing the switch changes of the drive circuit, in order to change the flash changes of the LED string light;

4. the controller is switched into the timing mode by long pressing the key SW for 3 seconds or manipulating the timing button of the remote control transmitter, and start timer, and after 6 (or 8) hours the power supply is off, then after 18 (or 16 hours, or set the length of time for it) hours the power supply is on again, so cycles.

The working process of the example two is as follows:

1. the DC power supply starts to work firstly after starting up, and then the DC voltage is built up on the fifth capacitance C 5 ;

2. the DC outputted by the DC power is supplied to the microcontroller U 2 and the infrared signal receiving circuit through the twelfth resistor R 12 , and then the microcontroller U 2 and the infrared signal receiving circuit work;

3. the operating state of the output signal of the microcontroller U 2 can be changed at any time through the key SW or the infrared remote control transmitter, thus changing the switch changes of the drive circuit, in order to change the flash changes of the LED string light;

4. The controller is switched into the timing mode by long pressing the key SW for 3 seconds or manipulating the timing button of the remote control transmitter, and start timer, and after 6 (or 8) hours the power supply is off, then after 18 (or 16 hours, or set the length of time for it) hours the power supply is on again, so cycles.