Energy-saving lamp with remote control and button dimming feature

This invention relates to a kind of dimmable energy-saving lamp with remote control and buttons dimming feature comprising: a power supply module (1), one end of which being connected to municipal power supply via the button-dimming switch (K), another end of which being connected to different parts of the whole circuit including the SCM control module (2), an SCM control module (2), the output end of which being connected to the dimming control module (3), the signal output end of said dimming control module (3) being connected to the signal input end of the energy-saving lamp tube as well as the energy-saving lamp tube as the illuminating component; the invention further features: a remote-control transmitting module (5) for transmitting wireless signals at least including dimming signals; a remote-control receiving module (6) for receiving wireless signals at least including dimming signals, the output end of said remote-control receiving module (6) being connected to an input end of said SCM control module (2); adopting remote control and button operation, this invention can achieve smooth dimming of energy-saving lamp tube within a large scope, making it a remote control energy-saving lamp capable of stepless dimming.

CROSS REFERENCE TO RELATED PATENT APPLICATION

This application claims the priority of the Chinese patent application No. 200920269613.X filed on Oct. 20, 2009, which application is incorporated herein by reference.

FIELD OF THE INVENTION

This utility relates to a kind of dimmable energy-saving lamp.

BACKGROUND OF THE INVENTION

The Chinese Invention Patent under Publication Number CN101309545 (Application number CN200810063600.7) disclosed A Kind of Dimmable Energy-saving Lamp with One-button Control, which comprises the lamp head, the lamp chamber and the energy-saving lamp tube, said lamp chamber being provided with a electronic ballast inside, said electronic ballast being provided with the regulating and filtering circuit, the voltage-control oscillation half-bridge circuit and the serial resonance circuit, the input end of said regulating and filtering circuit being connected to external power supply via said lamp head, the output end of said regulating and filtering circuit being connected to the input end of said voltage-control oscillation half-bridge circuit, the output end of said voltage-control oscillation half-bridge circuit being connected to the energy-saving lamp tube of said serial resonance circuit, said patent is featured by a SCM processing circuit inside said electronic ballast, the input end of said SCM processing circuit is connected to a working status detection circuit, the output end of said SCM processing circuit is connected to said voltage-control oscillation half-bridge circuit via the signal conversion circuit; said working status detection circuit outputs sampling signals, which will then be received and processed by said SCM processing circuit, which at the same time outputs the pulse width modulation signals, said signal conversion circuit converts said pulse width modulation signals into smooth dimming voltage signals, which will then be inputted in said voltage-control oscillation half-bridge circuit for dimming; said SCM processing circuit is provided with a control program, which allows the dimmable energy-saving lamp to work respectively in the brightest working status, continuous changing status and locked brightness status.

However, the button-controlled energy-saving lamp above has complicated circuit structure and high cost. Furthermore, it can be known from the circuits disclosed in the patent above that the patent only adopts button control, without remote control, the operation is not convenient; besides, the working status detection circuit comprises the 2ndresistor R2, the 1stcapacitor C1, the 1stresistor R1, the 1stdiode D1, the 2nd capacitor C2, the power on and power down of buttons are tested with the voltage at the 2ndresistor R2, since the charging and discharging of the 1stcapacitor C1and the 2ndcapacitor C2is a process of infinitesimal calculus, which is influenced by the 4thcapacitor C4on ICVCC, the time of charging and discharging cannot correspond to the hand-pressing time in real time, thus there is great time delay, which will necessarily result in dimming failure when the switch is turned on or off rapidly by hand. Finally, the working power supply of SCM is not reliable, which may cause incapability of the whole circuit, the detail is as follows: the SCM provides the PWM signal and process it into average voltage, which is sent to the voltage-control oscillator, which drives the operation of the serial resonance circuit for turning on or dim the energy-saving lamp tube, it is shown in the actual electrical diagram of the patent above, the working voltage ICVCC of the SCM is the DC voltage from the coupling of inductors L2and L1, while L2can only generate working current when the lamp tube is lit after the operation of the voltage-control oscillator and the serial resonance circuit. When the product is just powered on, the voltage-control oscillator is not working (waiting for PWM signal), and thus the serial resonance circuit cannot work, so there's no working current on L2, thus L1cannot be coupled to generate the ICVCC voltage, without working voltage, the SCM cannot output PWM signals, thus the circuit can never work with no ICVCC voltage generated.

SUMMARY OF THE INVENTION

The primary purpose of this invention is to provide a kind of energy-saving lamp, and more specially, a kind of energy-saving lamp with remote control and button control features capable of smooth dimming for lamp tube within a broad scope and capable of realizing stepless dimming, so as to solve the problem of existing technologies mentioned above.

Another technical problem to be solved by this invention is to provide a kind of energy-saving lamp with remote control and normal button dimming feature that is also provided with luminance memory feature according to existing technologies mentioned above so as to lighten the lamp at the luminance when the lamp is turned off for the last time.

The solution of this invention to solve the technical problems above is: a kind of energy-saving lamp with remote control and button dimming feature comprising:

One power supply module, one end of which is connected with the external power supply through the button-dimming switch, another end of which is connected to different parts of the whole circuit including the SCM control module, said power supply module supplies power to the energy-saving lamp tube and the whole circuit;

One SCM control module, the output end of which is connected to the dimming control module, said SCM control module may output PMW signals of different widths through the application according to the on/off conditions and time of power signals from the power supply module, and the signal output end of said SCM control module is connected to the signal input end of said dimming control module;

One dimming control module, which can output different working voltages according to the received PMW signals of different widths, the signal output end of said dimming control module is connected to the signal input end of the energy-saving lamp tube;

And the energy-saving lamp tube as the illuminating component; said energy-saving lamp further features:

One remote-control transmitting module for encoding directions like increasing and decreasing the luminance, turning on or off the lamp, etc. before transmitting them as wireless RF signals;

One remote-control receiving module for receiving wireless signals of dimming, the output end of which is connected to one input end of said SCM control module, thus the receiving module can decode and compare received RF signals before transmitting them to the SCM.

As an improvement, said whole circuit further comprises:

One EEPROM storage module comprises the EEPROM chip, which is connected to the input and output ends of said SCM control module as the luminance memory module, said SCM control module will then store the adjusted luminance in the EEPROM, when startup, the SCM in the SCM control module will invoke the stored value in the EEPROM to lighten the lamp via the circuit. Thus, the SCM outputs PWM signals of different widths or high/low level signals according to the value in the EEPROM, or the value sent by the remote-control receiving module or the SCM reset signals caused by the on/off of buttons, the signal output end of said SCM control module is connected to the signal input end of said dimming control module.

As an optimal practice, said SCM control module comprises:

One SCM microprocessor of model HT48R06,

Wherein, pin6of said SCM microprocessor is connected to the signal output end of said remote-control receiving module as the signal input end of said SCM control module;

Pin17and Pin18of said SCM microprocessor act as the signal communication ends between said SCM control module and said EEPROM storage module;

Pin1and Pin2of said SCM microprocessor are connected to the signal input end of said dimming control module as the signal output ends of said SCM control module.

As a further improvement, said SCM control module further comprises:

One power circuit, the power module comprises the 1stcapacitor, the 2ndcapacitor, the 3rdcapacitor, the 4thcapacitor, the 5thcapacitor, the 6thcapacitor, the 3rdresistor, the 1stand 2nddiodes and the 3-terminal stabilizing tube.

Wherein, the 1stterminal of the 1stcapacitor is connected to the 2ndterminal of said button-dimming switch, the 2ndterminal of the 1stcapacitor is connected to the positive pole of the 1stdiode, the 2ndterminal of the 1stcapacitor is connected to the negative pole of the 2nddiode, both terminals of the 2ndcapacitor are respectively connected to the negative pole of the 1stdiode and the positive pole of the 2nddiode, the positive pole of the 2nddiode is grounded, the negative pole of the 2nddiode is connected to the 1stterminal of the 3rdresistor, the 2ndterminal of the 3rdresistor is connected to the input end of the 3-terminal stabilizing tube, the output end of said 3-terminal stabilizing tube is connected to Pin12of the SCM microprocessor to supply power to the SCM microprocessor; the ground terminal of the 3-terminal stabilizing tube is grounded; the 1stterminals of the 3rdand the 4thcapacitors are both connected to the 2ndterminal of the 3rdresistor, the 2ndterminals of the 3rdand the 4thcapacitors are both grounded; the 1stterminals of the 5thand the 6thcapacitors are both connected to output end of the 3-terminal stabilizing tube, the 2ndterminals of the 5thand the 6thcapacitors are both grounded, so as to obtain stable and reliable power supply module for the SCM control module.

Said dimming control module comprises:

One charging and discharging circuit connected to the signal output end of said SCM control module for converting PWM signals with different widths generated by the SCM control module into continuous voltage signals;

One main control circuit, whose 1stsignal input pin is connected to the output end of the charging and discharging circuit for voltage-control oscillation processing of voltage signals inputted by the 1stsignal input pin and outputting square-wave signals of different frequencies at the 1stsignal output end and the 2ndsignal output end of said main control circuit;

And the inverter circuit, which is connected to the 1stsignal output end and the 2ndsignal output end of said main control circuit and outputs different working voltages to said energy-saving lamp tube according to the square-wave signals of different frequencies outputted by the main control circuit so as to achieve dimming and current stabilization.

In order to increase the variable gain of the current, the SNR of feedback signals of the whole dimming circuit is improved for deep control of dimming and to make the dimming process more linear and maintain stable current at any luminance without extinguishing upon fluctuation of the supply voltage or at the min luminance, said dimming circuit further comprises a closed-loop negative feedback circuit, the signal input end of which is connected to the signal output end of said inverter circuit, the signal output end of said closed-loop negative feedback circuit is connected to the signal input end of said main control circuit.

As an optimal practice, said dimming control module comprises:

One current sampling circuit and one voltage sampling circuit, which form the closed-loop negative feedback circuit;

Wherein, the signal input end of said current sampling circuit is connected to the 1stoutput end of said inverter circuit, the signal output end of said current sampling circuit is connected to the 3rdsignal input end of said main control circuit;

The signal input end of said voltage sampling circuit is connected with the 2ndoutput end of said inverter circuit, the signal output end of said voltage sampling circuit is connected to the 4thsignal input end of said main control circuit. Thus, the current and voltage signals obtained from sampling are multiplied in the multiplier inside the main control circuit, and then the average power of the lamp tube is obtained, which is sent to the signal input end of said inverter circuit as the negative feedback signal to realize closed-loop negative feedback control.

Compared with existing technologies, this invention is advantageous in that: through the power supply circuit, SCM control module and dimming control module with simple structure, the smooth dimming of the energy-saving lamp tube within broad scope is achieved, moreover, stepless dimming, remote controlled stepless dimming and remote on and off function of ordinary buttons are also realized; furthermore, adopting software detection of button-dimming switches, this invention is provided with lower cost and more stable performance; finally, this invention is more convenient and practical with the luminance memory feature.

DETAIL DESCRIPTION OF THE INVENTION

Detailed description of this invention will be given in combination with the drawings.

As shown inFIG. 1, the dimmable energy-saving lamp with remote-control button operation feature comprises one energy-saving lamp tube, one button-dimming switch K, one power supply module, one SCM control module2, one dimming control module3, one EEPROM storage module4, one remote-control transmitting module5and one remote-control receiving module6.

The 1stterminal of the button-dimming switch K is connected to municipal power, the 2ndterminal of the button-dimming switch K is connected to the 1stcapacitor C1of the power supply circuit, the on and off motions of the button-dimming switch will turn on and off the power supply, thus the SCM will be reset, the on/off status (power on and off) and time will result in different reset modes, the SCM program determines the on/off motions by detecting the reset mode, the SCM control module2outputs PMW signals of different widths through the application according to the on/off conditions and time of power signals from the power supply module, and the signal output end of said SCM control module2is connected to the signal input end of said dimming control module3, while the dimming control module3outputs different working voltages according to the received PMW signals of different widths, the signal output end of said dimming circuit3is connected to the signal input end of the energy-saving lamp tube.

Furthermore, one remote-control transmitting module5encodes remote-controlled dimming signals or on/off signals before transmitting them as wireless RF carrier wave signals, while corresponding remote-control receiving module6will receive the RF carrier wave signals and decode them before sending them to the SCM control module2, which will then output PWM signals or on/off signals to the dimming control module3so as to real remote-controlled dimming and on/off functions.

The whole circuit further comprises the EEPROM storage module4, which is connected to the input and output ends of said SCM control module2as the luminance memory module, said SCM control module2will then store the adjusted luminance in the EEPROM, when startup, the SCM in the SCM control module2will invoke the stored value in the EEPROM to lighten the lamp via the circuit. Thus, the SCM outputs PWM signals of different widths or high/low level signals according to the value in the EEPROM, or the value sent by the remote-control receiving module or the SCM reset signals caused by the on/off of buttons, the signal output end of said SCM control module2is connected to the signal input end of said dimming control module3.

In this embodiment, the SCM control module2comprises a core circuit22made up of the SCM microprocessor U1of model HT48R06 and its peripheral components, Pin1and Pin2of said SCM microprocessor U1are connected to the signal input end of said dimming control module3as the signal output ends of said SCM control module2.

The power supply module1comprises the power circuit21, which comprises the 1stcapacitor C1, the 2ndcapacitor C2, the 3rdcapacitor C3, the 4thcapacitor C4, the 5thcapacitor C5, the 6thcapacitor C6, the 3rdresistor R3, the 1stdiode D1and the 2nddiode D2and the 3-terminal stabilizing tube U2, wherein, the 1stterminal of the 1stcapacitor C1is connected to the 2ndterminal of said button-dimming switch K, the 2ndterminal of the 1stcapacitor C1is connected to the positive pole of the 1stdiode D1, the 2ndterminal of the 1stcapacitor C1is connected to the negative pole of the 2nddiode D2, both terminals of the 2ndcapacitor C2are respectively connected to the negative pole of the 1stdiode D1and the positive pole of the 2nddiode D2, the positive pole of the 2nddiode D2is grounded, the negative pole of the 1stdiode D1is connected to the 1stterminal of the 3rdresistor R3, the 2ndterminal of the 3rdresistor R3is connected to the input end of the 3-terminal stabilizing tube U2, the output end of said 3-terminal stabilizing tube U2is connected to Pin12of the SCM microprocessor U1to supply power to the SCM microprocessor U1; the ground terminal of the 3-terminal stabilizing tube U2is grounded; the 1stterminals of the 3rdcapacitor C3and the 4thcapacitor C4are both connected to the 2ndterminal of the 3rdresistor R3, the 2ndterminals of the 3rdcapacitor C3and the 4thcapacitor C4are both grounded; the 1stterminals of the 5thcapacitor C5and the 6thcapacitor C6are both connected to output end of the 3-terminal stabilizing tube U2, the 2ndterminals of the 5thcapacitor C5and the 6thcapacitor C6are both grounded. This circuit supplies stable 5V DC working power to the SCM microprocessor U1.

The dimming control module3comprises one charging and discharging circuit31, one main control circuit32, one inverter circuit33, one current sampling circuit34, one voltage sampling circuit35and one power supply switch circuit36, said current sampling circuit34and voltage sampling circuit35form the closed-loop negative feedback circuit, after the PWM signals of the signal output end of said SCM control module2passes the charging and discharging circuit31, the PWM signals with different widths generated by the SCM control module2are converted into continuous voltage signals, which are then inputted into the 1stsignal input pin of the main control circuit32, the main control circuit32will then carry out voltage-control oscillation processing on voltage signals inputted from the 1stsignal input pin and then output square-wave signals of different frequencies at the 1stsignal output end and the 2ndsignal output end of said main control circuit; PA2 signals of the signal output end of said SCM control module2are inputted into the 2ndsignal input pin of said main control circuit32via resistor R13, then the main control circuit32will generate on/off signals according to different PA2 signals so as to achieve the remote on/off feature of the energy-saving lamp; and the inverter circuit33outputs different working voltages to the energy-saving lamp tube as driven by the square wave signals of different frequencies outputted by the main control circuit32; the signal input end of said current sampling circuit34is connected to the 1stoutput end of said inverter circuit33, the signal input end of said voltage sampling circuit35is connected to the 2ndoutput end of said inverter circuit33, the signal output end of said current sampling circuit34is connected to the 3rdsignal input end of said main control circuit32, the signal output end of said voltage sampling circuit35is connected to the 4thsignal input end of said main control circuit32.

Wherein, the power supply switch circuit36introduces the municipal power from the jack J1, then the power passes the fuse F1, the 3rddiode D3, the 4thdiode D4, the 5thdiode D5and the 6thdiode D6, which form the regulating circuit, the filter of the 7thcapacitor C7will convert the 220V AC power into hi-voltage DC power, which is then sent into the inverter circuit33.

The main control chip IC1of the main control circuit32adopts PT5611_SOP chip, as the 1stsignal input end of the main control chip IC1, Pin7is connected to the pulse modulation signal output end (i.e., Pin1of said SCM control chip U1) of the SCM microprocessor U1via the charging and discharging circuit31; as the 2ndsignal input end of the main control chip IC1, Pin8is connected to the switch control signal output end (i.e., Pin2of said SCM control chip U1) of the SCM microprocessor U1via the resistor R13, in this embodiment, the switch control signal output end (i.e., Pin2of said SCM control chip U1) of the SCM microprocessor U1is connected to Pin8of said main control chip IC1after being connected to the partial pressure resistor R13; as the 4thsignal input end of the main control chip IC1, Pin2is connected to the signal output end of the voltage sampling circuit35; as the 3rdsignal input end of the main control chip IC1, Pin15is connected to the signal output end of the current sampling circuit34; as the 1stand 2ndsignal output ends, Pin9and Pin11of the main control chip IC1are respectively connected to the signal input end of the inverter circuit33. The charging and discharging circuit31, the inverter circuit33, the current sampling circuit34and the voltage sampling circuit35adopt the same circuit structure as that of the charging and discharging circuit, the main control circuit, the inverter circuit, the current sampling circuit and the voltage sampling circuit disclosed in the previous utility model application submitted by the applicant under the Patent No. ZL 200820086672.9 (A Remote-Control Dimmable Energy-saving Lamp).

The elements for button dimming are as follows:

When the button-dimming switch K is closed, the SCM microprocessor U1is powered and will be reset, the program in the SCM microprocessor U1will detect whether the value of the power-on and reset unit equals the EF value, if the off-time of the button switch exceeds 5 seconds, the remaining voltage in the circuit will be consumed down to about 0V due to the long off-time, thus the values in the SCM storage unit will not be stored, and so the value of the reset unit will not equal EF, in this case, the SCM will directly invoke the luminance value in the EEPROM storage module to output the PWM signals, then the energy-saving lamp will be on at the luminance when the lamp is turned off for the last time, which realizes luminance memory; if the off-time of the button switch is less than 5 seconds before the switch is connected again, the remaining voltage in the circuit will not be less than 3V, which is enough for keeping the values in the SCM storage unit, therefore, the value of the reset unit will be equal EF; if the user needs to adjust the luminance after startup, just disconnect button-dimming switch and connect it again; when the value of the reset unit equals the EF value, the SCM program will further detect whether the value in the luminance storage unit (which stores the current luminance value during auto dimming, the values at other time will be zeroed) equals 0, when the luminance value equals 0, the SCM program will start auto dimming from 5% to 100% of the luminance, the whole process will be about 10 seconds, when the highest luminance is reached, it will automatically adjust it down to 5% in about 10 seconds, after 3 cycles, the SCM program will store the luminance values in the luminance storage unit during the auto dimming process, if the button-dimming switch is not connected, the luminance will stay at 100%; at any time during the auto dimming, the user may disconnect the switch if satisfied with the current luminance and then immediately connect it again (the off-time should be less than 5 seconds), the program will determine the value of the luminance storage unit again, at this time, the value is not 0, then the SCM program will turn on the energy-saving lamp at the value stored in the luminance storage unit and send this value to the EEPROM storage module and at the same time zero the value of the luminance storage unit, and then the button dimming process of the SCM is completed;

The luminance percentage of 5%-100% corresponds to a PWM signal, the SCM will output different PWM signals according to different luminance, and the dimming control module3will also output a stable working voltage to the energy-saving lamp tube according to the PWM signal, thus the different luminance of the energy-saving lamp tube between 5%-100% can be obtained.

The elements for remote dimming are as follows:

When the button-dimming switch is connected, if the remote-control transmitting module is continuously transmitting dimming signals, the remote-control receiving module, upon receipt of the signals, with decode the signals, if the signal encoding is in accordance with the preset encoding of the receiver, the SCM program will slowly increase or decrease the current luminance value between 5%˜100%, the time for increasing from 5% to 100% is about 20 seconds, when 100% is reached, the luminance will be decreased gradually to 5%, also in about 20 seconds, as long as the remote-control transmitting module keeps transmitting, the luminance will be changed in cycles, and the SCM will synchronously output corresponding PWM signals to the main control circuit according to different luminance values to realize remote stepless dimming, once the remote-control transmitting module stops transmitting dimming signals, the SCM program will also stop increasing or decreasing the luminance, and the luminance will stay at the value on the last remote control operation, this luminance value will be sent to the EEPROM storage4.

Please seeFIG. 4for the dimming control flow of the SCM microprocessor.

The process of remote on/off is as follows:

When the button-dimming switch is connected and the energy-saving lamp goes out, if the remote-control transmitting module has transmitted the “on” signal, the remote-control receiving module, upon receipt of the signal, will decode the signal, if the signal decoding is in accordance with the preset encoding of the receiver, Pin2of the SCM U1will output high level to Pin8of the main control circuit, and then the main control circuit will output the “on” signal to turn on the energy-saving lamp; in the meanwhile, the SCM program will invoke the luminance value stored in the EEPROM storage4to output the PWM signal to the main control circuit so that the energy-saving lamp can be turned on at the luminance when the lamp is turned off for the last time; if the remote-control transmitting module has transmitted the “off” signal, Pin2of the SCM U1will output low level, and then the main control circuit will output “off” signal to turn off the energy-saving lamp, in the meanwhile, the SCM will store the luminance value at the time the lamp is turned off in the EEPROM storage4.