TWI726318B - Carry-signal controlled led lights with low power consumption and led light string having the same - Google Patents

Abstract

A carry-signal controlled LED light with low power consumption includes at least one LED and a drive unit. The drive unit is coupled to the LED, and receives a carry light signal to control the LED. The drive unit includes a light control unit. The light control unit drives the light behavior of the LED according light command content of the carry light signal. When a voltage of the carry light signal is less than a low-level voltage, the light control unit enters an eco mode, and the light control unit detects and identifies signals within a time interval. After the time interval, the light control unit enters a sleep mode.

Description

Low-power carrier-controlled light-emitting diode lamp and light-emitting diode lamp with the same Light diode string

The present invention relates to a light-emitting diode lamp and a light-emitting diode light string, in particular to a low-power carrier-controlled light-emitting diode light and a light-emitting diode light string with the light-emitting diode lamp.

Because light-emitting diodes (LEDs) have the advantages of high luminous efficiency, low power consumption, long life, fast response speed, high reliability, etc., light-emitting diodes have been widely used in light strips. (light bar) or light string (light string) series, parallel or series-parallel connection, used in lighting lamps or decorative lighting, such as Christmas tree lighting, sports shoes lighting effects... etc.

Taking festival lighting as an example, a complete light-emitting diode lamp basically includes a light-emitting diode string (having a plurality of lights) and a driving unit for driving the light. The driving unit is electrically connected to the light string, and by providing the required power to the light and a control signal with luminous data, it is controlled in a point-controlled or synchronous manner to realize the diversified light output effects of the light-emitting diode lamps And change.

With the advancement of technology, the control signal with light-emitting data can be carried on the power line through the carrier wave, which can realize the function of providing power and data transmission with the same circuit structure, so as to simplify the wiring design and reduce the circuit volume. And it is conducive to the design of the control circuit.

The driving unit mainly provides a light-emitting control signal with a high voltage level and a low voltage level to drive the light-emitting diode string. For the drive of the light string, usually the light string contains the series connected When the number of light diodes increases, the thicker and longer the connection line connecting the light-emitting diodes will increase the parasitic capacitive reactance of the light-emitting diode string, which makes the system not fast enough for signal processing, which increases misjudgment. Possibility of luminous signal. To effectively prevent the LED string from misinterpreting the lighting control signal, it is necessary to slow down the conversion speed of the lighting control signal between high voltage and low voltage. However, the LED string can drive fewer lights Or the light color changes slower.

Please refer to FIG. 1, which is a schematic diagram of the light-emitting control signal waveform of a related art light-emitting diode string. Figure 1 contains two light-emitting control signal waveforms, namely a first waveform Cv1 and a second waveform Cv2. In addition, the abscissa represents the time t, the ordinate represents the input voltage Vin, and is marked with a low-level voltage Vlow and a reset voltage Vreset, where the low-level voltage Vlow is the voltage for identifying the light-emitting control signal to a low level, and the reset voltage Vreset is the voltage for resetting the light-emitting diode. Take the second waveform Cv2 as an example. It is a sign of the natural discharge of the light-emitting control signal. Therefore, the problem is that when the parasitic capacitance of the line is too large, the discharge time will be longer, resulting in the failure to enter the next cycle. When the low-level voltage Vlow is reached, the light-emitting control signal cannot be recognized (identified) as the low-level voltage, that is, it is continuously judged as the high-level voltage. In this situation, the only way to increase the width between the two cycles is to enable the natural discharge to reach the low-level voltage Vlow and reach the identification of the low-level voltage Vlow. However, this control method is only suitable when the number of lights connected in series in the light string is small to achieve a better control effect, that is, because it cannot provide a complete light-emitting control signal with fast discharge, this control method cannot It is suitable for a large number of lamps in series (for example, the number of lamps above a hundred), that is, it is impossible to ensure that all lamps in series can receive a complete light-emitting control signal.

Based on this, the light-emitting control signal can be controlled by the fast discharge circuit to quickly reduce its voltage level or the light-emitting diode string with a small total parasitic capacitance of the line can easily cause the light-emitting control signal to quickly reduce its voltage level, such as the first The waveform Cv1 is shown. Only when the light-emitting control signal decreases rapidly, it is easy to It is easy to happen that the light-emitting control signal is lower than the recognizable low level voltage Vlow (such as time point t2), and then continues to decrease rapidly, so that the light-emitting control signal touches the reset voltage Vreset (such as time point t3), making the circuit unnecessary Misoperation of resetting, causing abnormal judgment and misoperation of the light-emitting diode module.

The prior art uses a set of signal voltage generating circuits on the control circuit to clamp the voltage so that the voltage does not drop to the reset voltage Vreset. But after all, the circuit is more complicated. Therefore, how to design a low-power carrier-controlled LED lamp and LED string with the LED lamp to solve the problem that the voltage of the light-emitting control signal is too small due to the parasitic capacitive reactance The reset voltage is touched, and the problem of abnormal judgment and misoperation of the light-emitting diode module is caused, and a more streamlined circuit is a major problem that the inventor of the present application intends to overcome and solve.

The purpose of the present invention is to provide a low-power carrier-controlled light-emitting diode lamp, simplify the application circuit and solve the problem that the voltage of the light-emitting control signal touches the reset voltage due to the rapid decrease of the light-emitting control signal, which causes abnormal judgment and misoperation of the light-emitting diode module problem.

In order to achieve the aforementioned purpose, the low-power carrier-controlled light-emitting diode lamp proposed by the present invention includes at least one light-emitting diode and a driving unit. The driving unit is coupled to the light-emitting diode, and the driving unit receives the carrier light-emitting signal to control the light-emitting diode to emit light. The drive unit includes a light-emitting control unit. The light-emitting control unit is used to drive the light-emitting behavior of the light-emitting diode according to the content of the light-emitting command of the carrier light-emitting signal. When the voltage of the carrier light-emitting signal is lower than the low-level voltage, the light-emitting control unit enters the energy-saving mode, and the light-emitting control unit performs signal detection and identification operations within the time interval; after the time interval ends, the light-emitting control unit enters the sleep mode.

In one embodiment, before the sleep mode, when the voltage of the carrier light-emitting signal is greater than the low-level voltage, the light-emitting control unit enters the working mode.

In one embodiment, after the sleep mode, when the voltage of the carrier light-emitting signal is greater than the low-level voltage, the light-emitting control unit leaves the sleep mode.

In one embodiment, the driving unit further includes an oscillator. The oscillator is coupled to the light-emitting control unit. In the energy-saving mode, the oscillator receives the control signal, and the oscillator is controlled by the control signal to perform oscillating operation with low power.

In one embodiment, the driving unit further includes a latch unit and an oscillator. The latch unit is coupled between the input side and the output side inside the LED lamp. The oscillator is coupled to the light-emitting control unit and the latch unit. In the energy-saving mode, the latch unit and the oscillator receive the control signal, and the oscillator is controlled by the control signal to stop the oscillating operation, and the latch unit is controlled by the control signal to provide a timing operation.

In one embodiment, the driving unit further includes a current detecting unit. The current detecting unit is coupled to the light emitting control unit and generates a control signal.

In one embodiment, the latch unit is a charging and discharging circuit including a resistor and a capacitor.

In one embodiment, the latch unit is a timing circuit.

In one embodiment, the driving unit further includes an address signal processing unit. The address signal processing unit is coupled to the light-emitting control unit and memorizes the light-emitting address. The address signal processing unit receives the address signal transmitted from the light-emitting control unit for comparison. When the address signal matches the light-emitting address, the light-emitting control unit is based on the carrier wave. The light-emitting command content of the light-emitting signal drives the light-emitting diode to emit light.

In one embodiment, the driving unit further includes an address burning unit. The address burning unit is coupled to the address signal processing unit. The carrier light signal includes a programming start signal and a programming address signal. In position When the address burning unit receives the burning start signal, the address burning unit writes the light-emitting address into the address signal processing unit according to the burning command content of the burning address signal.

In one embodiment, the driving unit further includes a discharge unit. The discharge unit is coupled to the current detection unit. When the discharge unit receives the carrier light signal transmitted by the current detection unit, the discharge unit starts to discharge the DC working power.

In one embodiment, the driving unit further includes a power capacitor. The power capacitor is coupled to the light-emitting control unit, the latch unit and the light-emitting diode.

By the proposed low-power carrier-controlled light-emitting diode lamp, the power consumption of the analog circuit in the light-emitting diode module can be effectively reduced, while maintaining the normal driving operation of the light-emitting diode module.

Another object of the present invention is to provide a low-power carrier-controlled light-emitting diode string, simplify the control circuit and solve the problem that the voltage of the light-emitting control signal touches the reset voltage due to the rapid decrease of the light-emitting control signal, which causes abnormal judgment of the light-emitting diode module The problem with misoperation.

In order to achieve the purpose of the foregoing disclosure, the carrier-controlled light-emitting diode string provided by the present invention includes a power cord, a controller, and at least one light-emitting diode lamp. The controller is coupled to the power line. The light-emitting diode lamp is coupled to the controller through the power line, and receives the DC working power and the carrier light-emitting signal transmitted by the controller through the power line.

In an embodiment, the controller includes a rectifier unit, a switch, and a control unit. The rectifier unit is coupled to the power line to provide DC working power. The switch connects the power cord and the LED lamp. The control unit is coupled to the rectifier unit and the switch. When the control unit controls the switch to be turned on, the DC working power forms a power supply loop for powering the light-emitting diode lamp through the power cord. When the control unit wants to generate the carrier light-emitting signal, the control unit continues to switch the switch on and off according to the light-emitting command content of the carrier light-emitting signal, so that the electric The DC working power of the source line forms a plurality of pulse waves to be combined into a carrier light signal, and is transmitted to the LED lamp through the power line.

In one embodiment, the controller further includes a discharge circuit. The discharging circuit is coupled to the power line and the control unit. When the switch is turned off, the controller drives the discharging circuit to receive the DC working power and start to discharge the DC working power.

In one embodiment, the controller further includes a voltage adjustment capacitor. The voltage adjustment capacitor is coupled to the power line, and when the switch is turned off, the voltage adjustment capacitor provides DC working power to the LED lamp.

With the proposed carrier-controlled light-emitting diode string, the power consumption of the analog circuit in the light-emitting diode module can be effectively reduced, while maintaining the normal driving operation of the light-emitting diode module.

In order to further understand the technology, means and effects of the present invention to achieve the intended purpose, please refer to the following detailed description and drawings of the present invention. I believe that the purpose, features and characteristics of the present invention can be obtained in depth and specificity. It is understood that, however, the accompanying drawings are only provided for reference and illustration, and are not intended to limit the present invention.

100: Controller

10: Power conversion circuit

20: Control circuit

30: LED string lights

31,32,…,3n: LED module

Sec: Luminous control data

FUSE: fuse

VAR: Varistor

R10: Input resistance

C11: Input capacitance

D11~D14: Diode

CONR: control unit

Qsw: output control switch

R22, R23: resistance

C21: Capacitance

Dz: Zener diode

311: Light-emitting control unit

312: address signal processing unit

313: Address burning unit

41: voltage regulator

42: Oscillator

43: Address and Data Identifier

44: Logic Controller

45: Displacement register

46: Output buffer register

47: drive circuit

48: Address register

49: address comparator

50: address memory

51: Address burning controller

52: Burn signal detector

53: signal filter

54: discharge unit

55: current detector

56: Latch unit

60: Power capacitor

24: Voltage adjustment unit

Sc: control signal

Lp: power cord

Ro: Resistance

Co: Capacitance

In11~In22: inverter

Vlow: Low level voltage

Vreset: reset voltage

Vd: luminous drive signal

Vdis: discharge voltage

Vlatch: latch voltage

Slatch: latch judgment signal

Vac: AC power

Vdc: DC power supply

Cv1: The first waveform

Cv2: second waveform

t11~t14, t21~t23: time point

t1~t2: time point

T: Time interval

FIG. 1 is a schematic diagram of the light-emitting control signal waveform of a related art light-emitting diode string.

2A is a circuit block diagram of the first embodiment of the driving system of the low-power carrier-controlled light-emitting diode string of the present invention.

2B is a circuit block diagram of the second embodiment of the driving system of the low-power carrier-controlled light-emitting diode string of the present invention.

FIG. 3A is a detailed circuit diagram of an embodiment of the power conversion circuit and the control circuit in FIG. 2A.

FIG. 3B is a detailed circuit diagram of the power conversion circuit and the control circuit in FIG. 2B.

FIG. 3C is a detailed circuit diagram of another embodiment of the power conversion circuit and the control circuit in FIG. 2A.

FIG. 4 is a schematic diagram of the waveform of the light-emitting driving signal of the present invention.

FIG. 5 is a circuit block diagram of the first embodiment of the light-emitting diode module of the present invention.

FIG. 6 is a circuit block diagram of the second embodiment of the light emitting diode module of the present invention.

Fig. 7 is a schematic diagram of the circuit of the oscillator of the present invention.

FIG. 8 is a schematic diagram of waveforms of the operation of the latch unit of the present invention.

The technical content and detailed description of the present invention are described below in conjunction with the drawings.

Please refer to FIG. 2A, which is a circuit block diagram of the first embodiment of the driving system of the low-power carrier-controlled light-emitting diode string of the present invention. The driving system of the first embodiment includes a power conversion circuit 10, a control circuit 20 and a light-emitting diode string 30. Wherein, the power conversion circuit 10 and the control circuit 20 can be integrated into the controller 100, specifically, it can be realized by a physical circuit control box including the power conversion circuit 10 and the control circuit 20. The power conversion circuit 10 receives the AC power Vac and converts the AC power Vac into a DC power Vdc, where the DC power Vdc can be generated on an output capacitor (not shown) connected across the output of the power conversion circuit 10.

The control circuit 20 receives the DC power supply Vdc to provide the DC power supply required by the control circuit 20 and the LED string 30. The controller 100 is coupled to an AC power source Vac through a power line Lp 30 with light-emitting diode string. Broadly speaking, the power line Lp is not limited by the label in Figure 2A. As long as it can be used as a line for transmitting the power provided by the AC power supply Vac or the DC power supply Vdc, it should belong to the scope of the power line Lp, such as the AC power supply Vac and the power conversion circuit 10, the electrical connection between the control circuit 20 and the anode end of the light emitting diode string 30, or the electrical connection between the control circuit 20 and the cathode end of the light emitting diode string 30. In this embodiment, the light-emitting diode string 30 includes a plurality of light-emitting diode modules (or light-emitting diode lamps) 31, 32,..., 3n, and the light-emitting diode modules 31, 32 ,...,3n are connected in series and electrically connected to the control circuit 20. In this embodiment, the light-emitting diode string 30 is a light string with a burning function, so each of the light-emitting diode modules 31, 32,..., 3n has its own burning process for light-emitting data and address data. The digital and analog circuits will be explained later.

The control circuit 20 can be wired (wired) or wireless (wireless). In addition to the built-in light emission data, it can also receive the light emission control data Sec from the outside, so that the control circuit 20 can control the light emitting diode according to the content of the light emission control data. The light-emitting diode modules 31, 32,..., 3n of the light string 30 perform light-emitting control. For example, the user can transmit the light emission control data Sec to the control circuit 20 in a wired manner by operating a computer, so that the control circuit 20 performs light emission control according to the light emission control data Sec. Alternatively, the user can wirelessly transmit the light emission control data Sec to the control circuit 20 by operating a mobile phone or a wearable device, so that the control circuit 20 can perform light emission control according to the light emission control data Sec. However, the present invention is not limited by the manner of transmitting the light-emitting control data Sec and the operated user device.

Please refer to FIG. 2B, which is a circuit block diagram of the second embodiment of the driving system of the low-power carrier-controlled light-emitting diode string of the present invention. The main difference between the second embodiment and the first embodiment shown in FIG. 2A lies in the light-emitting diode modules 31, 32,..., 3n of the light-emitting diode string 30 of the former (ie, the second embodiment). It is connected in parallel and electrically connected to the control circuit 20. In this example In this case, since the light-emitting diode modules 31, 32,..., 3n are connected in parallel, the control circuit 20 and the light-emitting diode modules 31, 32,..., 3n directly pass through the DC The power supply Vdc is for example but not limited to a battery unit. That is, compared to the first embodiment of FIG. 2A, the operation of converting the AC power Vac into the DC power Vdc by the power conversion circuit 10 is omitted. Similarly, the light-emitting diode string 30 is a light string with a programming function, so each of the light-emitting diode modules 31, 32,..., 3n has its own digital bit for programming the light-emitting data and address data. The analogy line will be explained later.

Please refer to FIGS. 3A and 3B, which are detailed circuit diagrams of the power conversion circuit and the control circuit in FIGS. 2A and 2B, respectively. The power conversion circuit 10 includes a fuse FUSE, a varistor VAR, an input resistor R10, an input capacitor C11 connected in parallel to the input resistor R10, and a full bridge rectifier composed of multiple diodes D11 to D14. The fuse FUSE and the varistor VAR respectively provide overcurrent and overvoltage protection for the power conversion circuit 10. The input resistor R10 and the input capacitor C11 are coupled between the fuse FUSE, the varistor VAR and the full-bridge rectifier. The excess energy can be absorbed by the input capacitor C11 to adjust the total amount provided to the LED string 30 The size of the voltage. After the AC power Vac is rectified by the full-bridge rectifier, the output is a DC power Vdc and is connected across the output capacitor C2 at both ends of the output of the power conversion circuit 10.

The control circuit 20 includes a control unit CONR, an output control switch Qsw, and a control unit CONR operating voltage generating circuit. The control unit CONR is coupled to the output control switch Qsw and the control unit CONR operating voltage generating circuit. The output control switch Qsw receives the DC power Vdc and is controlled by the control unit CONR to turn on or off the DC power Vdc and transmit it to the LED string 30. In this embodiment, the output control switch Qsw is coupled to the anode end of the light-emitting diode string 30, and it is a p-channel metal oxide semiconductor field effect transistor (p-channel MOSFET) through a resistor R23 Coupled to the control unit CONR. However, in other embodiments, the output control switch Qsw can also be coupled to the generator The cathode end of the photodiode string 30, which is an n-channel MOSFET (n-channel MOSFET), is coupled to the control unit CONR through a resistor R23, so that the equivalent characteristics of the circuit can be achieved.

In this embodiment, the operating voltage generating circuit of the control unit CONR includes a resistor R22, a capacitor C21, and a Zener diode Dz. The capacitor C21 is connected in parallel with the Zener diode Dz, and then connected with the resistor R22, but the present invention is not limited by this. The Zener diode Dz receives the DC power supply Vdc via the resistor R22, and clamps the DC power supply Vdc at a predetermined fixed voltage value to provide the operating voltage required by the control unit CONR. However, the present invention is not limited to the structure of the operating voltage generating circuit of the control unit CONR shown in FIG. 3A. As long as the circuit structure can achieve the function of generating operating voltage, it should be included in the scope of the present invention.

For cooperation, refer to FIG. 3C, which is a detailed circuit diagram of another embodiment of the power conversion circuit and the control circuit in FIG. 2A. Compared with FIG. 3A, the control circuit 20 further includes a voltage adjustment unit 24, which can be a fast discharge circuit for adjusting the fast discharge or voltage of the DC operating power provided to the LED string 30 The adjusting unit 24 may be a voltage adjusting capacitor for adjusting the slow discharge of the DC working power provided to the LED string 30.

If the voltage adjustment unit 24 is a voltage adjustment capacitor, the voltage adjustment unit 24 is coupled in parallel to the two ends of the light-emitting diode string 30, and according to the capacitance value (capacitive reactance) provided by it, the voltage adjustment unit 24 is provided to the light-emitting diode The DC working power of the body light string 30 slows down the discharge.

If the voltage adjustment unit 24 is a fast discharge circuit, the voltage adjustment unit 24 is coupled to the output control switch Qsw, the light emitting diode string 30 and the control unit CONR, and is controlled by the control unit CONR. When the control unit CONR controls the output control switch Qsw to be turned off, the control unit CONR reduces the voltage (or output voltage) output to the light-emitting diode string 30 in a discharge manner, or controls the fast discharge circuit ( Voltage adjustment unit 24), or by controlling each light-emitting diode phantom Fast discharge circuits (not shown) in groups 31, 32,..., 3n to quickly reduce the voltage of the DC working power output to the LED string 30. The control unit CONR turns on the output control switch Qsw according to the set time to restore (increase) the output voltage output to the light-emitting diode string 30, and generate a light-emitting drive signal according to the received light-emitting control data Sec to make the light-emitting diode The body light string 30 operates in the light-emitting mode according to the light-emitting drive signal.

Conversely, when there is no light-emitting drive signal to be transmitted to the light-emitting diode string 30, the control unit CONR controls the output control switch Qsw to be turned on, so that the DC power supply Vdc output by the power conversion circuit 10 (that is, the DC work Electricity) supplies power to the LED string 30 via the output control switch Qsw. Therefore, as long as the output control switch Qsw is controlled to be off or on, the light-emitting drive signal and the power supply can be transmitted to the light-emitting diode string 30 under the same circuit structure.

Please refer to FIG. 4, which is a schematic diagram of the waveform of the light-emitting driving signal of the present invention. As mentioned above, when the control unit CONR controls the output control switch Qsw to be turned off, the light-emitting diode string 30 reduces the voltage in a discharge manner to provide each of the light-emitting diode phantoms for driving the light-emitting diode string 30 The low-level voltage of the light-emitting drive signal Vd of the groups 31, 32,..., 3n. Or, by controlling the fast discharge circuit in each light emitting diode module 31, 32,..., 3n, the voltage generated by the light emitting signal voltage generating circuit can be quickly reduced to provide each of the light emitting diode string 30 The low-level voltage of the light-emitting drive signal Vd of the light-emitting diode modules 31, 32, ..., 3n. It is worth mentioning that the present invention adopts three modes for the control of each of the light-emitting diode modules 31, 32,..., 3n: the first is the working mode, the second is the energy-saving mode (eco mode), and the third is It is a sleep mode, so that each of the light-emitting diode modules 31, 32,..., 3n can be operated under normal operation, and also has the requirement of low power consumption.

The working mode means that the internal circuits (including analog circuits and digital circuits) of each of the light-emitting diode modules 31, 32, ..., 3n are in normal operation required. When in order to achieve low power consumption, first adopt the energy-saving mode, and then adopt the sleep mode. The energy-saving mode is mainly used to turn off the more power-consuming analog circuits first. However, considering the close cooperation between the oscillator and the digital circuit, the energy-saving mode can be achieved by first turning off the analog circuits other than the oscillator or the analog circuits containing the oscillator. The ground reduces the more power-consuming sources and maintains the normal operation of the digital circuit, so that the signal detection and recognition can work normally. In the energy-saving mode, the oscillator can be operated at low power without shutting down. Then, after the signal detection and identification actions are completed, the oscillator is turned off, and the sleep mode is entered. In this way, it can be solved that the light-emitting drive signal Vd is rapidly reduced due to the rapid discharge operation and the reset voltage Vreset is touched, which causes unnecessary reset malfunction of the circuit, which causes abnormal judgment and malfunction of the light-emitting diode module 31.

Specifically, as shown in the waveform shown in FIG. 4 and in conjunction with FIG. 3A, before the time point t11, the control unit CONR controls the output control switch Qsw to be turned on, and therefore, each of the light-emitting diode modules 31, 32, ... , 3n is the operation of working mode. At the time point t11, the control unit CONR controls the output control switch Qsw to be turned off. At this time, the light-emitting drive signal Vd decreases rapidly. At time t12, the light-emitting drive signal Vd reaches the low-level voltage Vlow, and the light-emitting drive signal Vd is identified as the light-emitting diode modules 31, 32,..., 3n (hereinafter a light-emitting diode phantom) Group 31 description) Drive signal for control. However, in order to prevent the light-emitting drive signal Vd from being gradually reduced in the process of driving the light-emitting diode module 31 and touch the reset voltage Vreset, unnecessary resetting of the circuit may occur, which may cause abnormal judgment of the light-emitting diode module 31 Therefore, at time t12, the energy saving mode is entered, and the analog circuit except the oscillator or the analog circuit including the oscillator is turned off first, which greatly reduces the source of more power consumption. In addition, in order to maintain the normal operation of the digital circuit and the oscillator, the signal detection and identification actions are completed within a time interval T, and then at the time point t13, the sleep mode is entered to greatly reduce the light emission. The power consumption of the diode module 31. The above-mentioned time interval T is the time interval between the time point t12 and the time point t13, for example, but not limited to the time length of several (3 to 4) clock cycles. Therefore, after the time point t13, the power consumption of the light-emitting diode module 31 can be minimized by completely turning off the oscillator. This not only achieves the optimal effect of reducing power consumption, but also avoids the light-emitting drive signal. The Vd decreases and touches the abnormal condition caused by the reset voltage Vreset. At time t14, since the control unit CONR controls the output control switch Qsw to be turned on, the voltage level of the light-emitting drive signal Vd is restored. Because the voltage level of the light-emitting drive signal Vd is greater than the low-level voltage Vlow, the operation in the sleep mode is left (released), and the operation in the next cycle is entered, and the operation in the working mode is resumed again.

FIG. 4 additionally shows the light-emitting drive signal Vd for a relatively narrow time (for example, 1 microsecond, but not limited by this). Similar to the light-emitting drive signal Vd of a relatively wide time (for example, 3 microseconds, but not limited to this) as indicated by the time point t11 to time point t14, the difference between the two is that the light-emitting drive signal Vd of the narrower time is in the time interval Before T has ended, that is, before entering the sleep mode, because the control unit CONR controls the output control switch Qsw to be turned on, the voltage level of the light-emitting drive signal Vd is restored, and the operation in the working mode is resumed again. In this case, it is also possible to avoid the abnormal condition caused by the decrease of the light-emitting drive signal Vd and the reset voltage Vreset.

Please refer to FIG. 5, which is a circuit block diagram of the first embodiment of the light emitting diode module of the present invention. As mentioned above, the light-emitting diode string 30 is a light string with a burning function, so each of the light-emitting diode modules 31, 32,..., 3n has its own programming process for light-emitting data and address data. Digital and analog circuits, such as a light emitting control unit 311 responsible for light emission control, an address signal processing unit 312 responsible for address signal processing, and an address burning unit 313 responsible for address burning. As shown in FIG. 5, the light-emitting diode module 31 with the burning function is taken as an example (the other light-emitting diode modules 32,..., 3n have the same circuit block, and will not be repeated), the light-emitting diode module 31 (i.e. light-emitting diode lamp) contains voltage stabilizer 41, oscillator 42. Address and data identifier 43, logic controller 44, shift register 45, output buffer register 46, drive circuit 47, address register 48, address comparator 49, address memory 50 , Address programming controller 51, programming signal detector 52, signal filter 53, discharge unit 54, current detector 55, and latch unit 56.

Among them, the discharge unit 54 can realize the discharge function through the on and off control of the power switch. The current detector 55 can be a voltage divider resistor network, which can detect the magnitude of the current correspondingly by dividing the voltage value obtained by dividing the received voltage. Incidentally, the light-emitting control unit 311 includes the aforementioned address and data identifier 43, the logic controller 44, and the shift register 45. The light-emitting control unit 311 is used to drive the light-emitting behavior of the light-emitting diode according to the light-emitting command content of the carrier light-emitting signal. Among them, the content of the light-emitting command corresponds to the specific identification code content of the light-emitting behavior (mode) of the light-emitting diode, such as color change, light-off (dark) mode, light-off frequency... and so on. The address signal processing unit 312 includes the aforementioned address register 48, an address comparator 49, and an address memory 50. The address burning unit 313 includes the above-mentioned address burning controller 51 and the burning signal detector 52.

Incidentally, the light-emitting diode module shown in FIG. 5 is applied to the series connection of FIG. 2A and FIG. 3A. Therefore, a voltage regulator 41 is required for voltage regulation and stabilization. In addition, if the light-emitting diode module is applied to the parallel connection of FIG. 2B and FIG. 3B, the main difference from FIG. 5 is that there is no need to additionally use the voltage regulator 41 for voltage regulation and stabilization. The rest of the circuit operation principles and actions are the same as those described in FIG. 5. The light-emitting diode module shown in Figure 5 adopts a point-controlled operation mode, so the light-emitting diode module has an address signal processing unit for address data processing (including operations such as judgment, memory, burning, etc.) 312 and the address burning unit 313 include an address register 48, an address comparator 49, an address memory 50, an address burning controller 51, and a burning signal detector 52. In other words However, if the light-emitting diode module adopts a synchronous operation mode, the address signal processing unit 312 and the address burning unit 313 can be omitted, and only the light-emitting control unit 311 for light-emitting data processing is required.

In the above-mentioned circuit, it can be divided into an analog circuit part and a digital circuit part according to the difference of signal characteristics. Among them, the voltage regulator 41, the oscillator 42, the address programming controller 51, the programming signal detector 52, and the discharge unit 54 belong to the analog circuit part, and the others can be classified into the digital circuit part. However, in different embodiments, the address programming controller 51 and the programming signal detector 52 can also be implemented by both an analog circuit and a digital circuit. Compared with the low power consumption characteristics of digital circuits, analog circuits (such as voltage regulator 41, oscillator 42, light-emitting control unit 311, address signal processing unit 312, address burning unit 313, and discharge unit 54) belong to the second type of light-emitting circuit. The circuit element of the pole body module 31 that consumes more power. Therefore, the creative feature of the present invention focuses on operating in the energy-saving mode and the sleep mode to effectively reduce the power consumption of these analog circuits, while maintaining the normal driving operation of the light-emitting diode module 31, as described below.

The voltage stabilizer 41 receives the input voltage, and provides voltage regulation and control to it, so that the provided output voltage remains stable. The oscillator 42 generates a periodic clock signal as a time reference for maintaining the light-emitting control unit 311, the address signal processing unit 312, and the address burning unit 313 to operate normally and in an orderly manner. The address and data identifier 43 is coupled to the oscillator 42; the logic controller 44 is coupled to the address and data identifier 43; the shift register 45 is coupled to the logic controller 44; the output buffer register 46 is coupled to the shift register The device 45 is also coupled to the driving circuit 47. The driving circuit 47 is coupled to a plurality of light emitting diodes.

The address register 48 is coupled to the logic controller 44; the address comparator 49 is coupled to the logic controller 44 and the address register 48; the address memory 50 is coupled to the address comparator 49. The address burning controller 51 is coupled to the address memory 50; the burning signal detector 52 is coupled to the address memory 50 and the address burning controller 51. The signal filter 53 is coupled to the address and data identifier 43, the voltage regulator 41 and the oscillator 42.

The light-emitting drive signal generated by the control circuit 20 is transmitted to the light-emitting diode module 31, filtered by the signal filter 53, and provided to the address and data recognizer 43 for recognition. After identification, the address and data recognizer 43 respectively recognizes the address data (information) and the light-emitting data (information) in the light-emitting drive signal, and the address and data recognizer 43 transmits the address data and the light-emitting data to Logic controller 44. The logic controller 44 transmits the address data to the address register 48. Although not limited to this, the address data can also be sent to the address register 48 by the address and data recognizer 43 after the address and data recognizer 43 recognizes the address data.

The address comparator 49 receives the address data of the address register 48, and also receives the local address data stored in the address memory 50, and then compares the address data with the local address data. If the address data is the same as the local address data, it means that the current light-emitting data received by the logic controller 44 is the light-emitting control data of the light-emitting diode module 31. At this time, the address comparator 49 informs The logic controller 44 transmits the light-emitting data to the driving circuit 47 through the displacement register 45 and the output buffer register 46 for driving the light-emitting diodes. Conversely, if the address data is different from the local address data, it means that the current light-emitting data received by the logic controller 44 is not the light-emitting control data of the light-emitting diode module 31, but other light-emitting diodes. The light emission control data of one of the modules 32,..., 3n.

When the programming signal detector 52 detects the programming start signal, the programming signal detector 52 notifies the address programming controller 51. At this time, the address burning controller 51 starts to receive the burning address data, and burns the burning address data into the address memory 50, so that the address memory 50 stores the local address data.

Please refer to FIG. 6, which is a circuit block diagram of the second embodiment of the light emitting diode module of the present invention. Compared with the first embodiment shown in FIG. 5, the light emitting diode module further includes a latch unit 56, and the rest of the circuit units are the same as those in FIG. 5. The latch unit 56 is coupled to the input inside the light emitting diode module 31 Between the side and the output side, it is used to replace the function of the oscillator 42 when operating in the sleep mode, so that the light-emitting diode module 31 can continuously perform signal detection and identification actions. In one embodiment, the latch unit 56 may be a charge-discharge analog circuit with charging and discharging functions composed of resistors and capacitors.

Hereinafter, the technical means of how to reduce power consumption and achieve energy saving in the present invention will be described. With reference to FIG. 4, when it is detected that the light-emitting drive signal Vd reaches the low level voltage Vlow (for example, the time point t12 or the time point t22 shown in FIG. 4), the current detector 55 generates the control signal Sc. At this time, the light is emitted. The more power-consuming analog circuits in the diode module 31, such as the voltage regulator 41, the oscillator 42, the address programming controller 51, the programming signal detector 52, and the discharge unit 54, are controlled by the control signal Sc. Enter the energy-saving mode to reduce the main source of power consumption. This energy-saving mode can be regarded as the first stage control mode to reduce power consumption. However, the control of the digital circuit is closely related to the oscillator 42. Therefore, in order to ensure that the digital circuit can complete its necessary operations, the control of the oscillator 42 of the analog circuit to enter the sleep mode is regarded as the second stage control mode to reduce power consumption. Specifically, the present invention proposes two solutions to achieve low power consumption control of the oscillator 42 in the energy-saving mode: the first solution is: the oscillator 42 is operated at low power oscillation; the second solution is : Replace the oscillating operation of the oscillator 42 with a charging and discharging circuit.

Please refer to FIG. 7, which is a schematic diagram of the circuit of the oscillator of the present invention, and cooperates with that shown in FIG. 5. In terms of control accuracy, the control method using the oscillator 42 as the clock reference is the most ideal method. However, in order to have both accurate control and low power consumption requirements, the first solution adopted is to provide a specific design for the oscillator 42 to achieve low-power oscillating operation. The oscillator 42 shown in FIG. 7 has a plurality of inverters In11~In22 and a resistor Ro and a capacitor Co. The circuit connection is only for illustrative purposes, and is not intended to limit the present invention, as long as the oscillator can generate the system clock. All circuits should be included in the scope of the present invention. Among them, the plurality of inverters In11~In22 are CMOS transistor circuit inverters, which can be designed with different transistor sizes, and through the control of enabling and disabling. System to realize the demand for accurate control and low power consumption. For example, but this should not be a limitation, design the transistor size of inverter In12 and inverter In22 to be smaller than the transistor size of inverter In11 and inverter In21 respectively, and control inverter In11 through control signal Sc With inverter In21.

When the oscillator 42 is in normal operation, that is, the light emitting diode module 31 is operating in the working mode (before the time point t12 as shown in FIG. 4), the inverters In11 to In22 are all in the enabled state, therefore, the oscillation The device 42 can operate at full power to provide a clock signal. When it is detected that the light-emitting drive signal Vd reaches the low level voltage Vlow (at time t12 as shown in FIG. 4), the control signal Sc generated by the current detector 55 controls the inverter In11 and the inverter In21 to be disabled State (at this time, the inverter In12 and the inverter In22 are still in the enabled state), but not as a limitation, the inverter In12 and the inverter In22 can also be controlled to be in the disabled state, and the inverter In11 The inverter In21 is in the enabled state. Therefore, the oscillator 42 can still operate at low power and provide a clock signal to maintain the digital circuit to complete its necessary operations and achieve the low power consumption operation of the oscillator 42 at the same time. Until the light-emitting diode module 31 completes the signal detection and identification action in the time interval T between the time point t12 and the time point t13 shown in FIG. 4, the oscillator 42 can be completely turned off and the time point t13 is entered. Sleep mode afterwards. However, the above-mentioned connection mode, number, size, and control mode of the control signal of the inverters are for illustrative purposes only, and are not intended to limit the present invention.

Please refer to FIG. 8, which is a waveform diagram of the operation of the latch unit of the present invention, and is shown in conjunction with FIG. 6. In order to respond to the light-emitting drive signal Vd for a longer time (for example, 6~8 microseconds, but not as a limit), for example, as a latch signal for terminating identification, correct operation to avoid premature stop of oscillation The operation of the device 42 causes the digital circuit to be out of sequence and malfunction. However, in order to enable the relatively power-consuming oscillator 42 to be turned off as soon as possible to achieve low power consumption, as shown in FIG. 6, a latch unit 56 with charging and discharging functions is added, such as a resistor-capacitor charging system. The discharge circuit is implemented and can replace the timing function of the oscillator 42. As mentioned above, for the luminescence with a time width of 3 microseconds or 1 microsecond Regarding the driving signal Vd (the signals of the first two cycles as shown in FIG. 8), since it is not a latch signal, the discharge operation of the capacitor through the latch unit 56 (not limited to this, it can also be charging Operation), since the discharge voltage Vdis is higher than the preset latch voltage Vlatch, the latch determination signal Slatch is at a low level. In this state, the oscillator 42 can use the aforementioned low-power oscillation method in the energy-saving mode, and turn off the oscillation operation in the sleep mode, so as to achieve a low-power energy-saving operation.

When the light-emitting drive signal Vd is a latch signal with a time width of 6 to 8 microseconds (the signal of the third cycle as shown in FIG. 8), the discharge time of the capacitor of the latch unit 56 is relatively long, so that At time t1, the discharge voltage Vdis is equal to or lower than the latch voltage Vlatch, and at this time, the latch determination signal Slatch changes from a low level to a high level. In addition, the continuous discharge of the capacitor of the latch unit 56 ensures that the normal detection and control of the light-emitting drive signal Vd as the latch signal can be maintained after the oscillator 42 is turned off. Until the time point t2, since the control unit CONR controls the output control switch Qsw to be turned on, the voltage level of the light-emitting drive signal Vd is restored. Because the voltage level of the light-emitting drive signal Vd is greater than the low-level voltage Vlow, the latch determination signal Slatch is changed from the high-level to the low-level, leaving (releasing) the operation of the sleep mode, and entering the next cycle of operation , The operation of the working mode is resumed again.

However, the normal detection and control of the latch signal is not limited by the above-mentioned comparison of the discharge voltage Vdis and the latch voltage Vlatch, and a preset length of time can also be used to perform the latch operation of the latch unit 56, such as a latch. The storage unit 56 can be realized by a timing circuit. Therefore, when the preset time length is reached or exceeded, the latch operation of the latch unit 56 is started, which can also meet the requirement of low power consumption.

In summary, the present invention has the following features and advantages:

1. It can realize the function of transmitting the light-emitting drive signal and power supply to the light-emitting diode string under the same circuit structure.

2. The fast discharge circuit of each LED module can provide fast discharge control light-emitting drive signal to quickly reduce its voltage level to ensure that all series-connected light-emitting diodes can get complete light-emitting control.

3. Simplify the application circuit and solve the problem that the voltage of the light-emitting control signal touches the reset voltage due to the rapid decrease, which causes abnormal judgment and misoperation of the light-emitting diode module.

4. Effectively reduce the power consumption of these analog circuits in the light-emitting diode module, while maintaining the normal driving operation of the light-emitting diode module.

5. The light-emitting diode module can adopt point-controlled operation mode or synchronous operation mode, which not only improves the flexibility and convenience of control circuit design, but also realizes the diversified light output effects of light-emitting diode lamps. And change.

6. Through the specific design of the oscillator circuit, the oscillator will oscillate at low power to provide a clock signal before entering the sleep mode, thereby maintaining the digital circuit to complete its necessary operations and achieving low power consumption operation of the oscillator .

7. Through the design of the charge and discharge time of the latch unit or the design of the preset time, to ensure that the light-emitting drive signal can be maintained as the latch signal after the oscillator is turned off, and the normal identification and detection of the latch signal is achieved, and the low power consumption of the oscillator operating.

The above are only detailed descriptions and drawings of the preferred embodiments of the present invention. However, the features of the present invention are not limited to these, and are not intended to limit the present invention. The full scope of the present invention shall be within the scope of the following patent applications. As the standard, all embodiments that conform to the spirit of the patent application of the present invention and similar changes should be included in the scope of the present invention. Anyone familiar with the art in the field of the present invention can easily think of changes or Modifications can be covered in the following patent scope of this case.

31: LED module

311: Light-emitting control unit

312: address signal processing unit

313: Address burning unit

41: voltage regulator

42: Oscillator

43: Address and Data Identifier

44: Logic Controller

45: Displacement register

46: Output buffer register

47: drive circuit

48: Address register

49: address comparator

50: address memory

51: Address burning controller

52: Burn signal detector

53: signal filter

54: discharge unit

55: current detector

56: Latch unit

60: Power capacitor

Lp: power cord

Sc: control signal

Claims (16)

A low-power carrier-controlled light-emitting diode lamp, comprising: at least one light-emitting diode; and a driving unit coupled to the light-emitting diode. The driving unit receives a carrier light-emitting signal to control the light-emitting diode to perform The driving unit includes a light-emitting control unit that drives the light-emitting behavior of the light-emitting diode according to the light-emitting command content of the carrier light-emitting signal; wherein when the voltage of the carrier light-emitting signal is less than a low level voltage , The light-emitting control unit enters an energy-saving mode, by first turning off analog circuits other than the oscillator or analog circuits containing the oscillator to turn off the more power-consuming analog circuits, and within a time interval, the light-emitting control unit signals The operation of detection and identification; after the end of the time interval, the light-emitting control unit enters a sleep mode. The low-power carrier-controlled light-emitting diode lamp described in item 1 of the scope of patent application, wherein before the sleep mode, when the voltage of the carrier light-emitting signal is greater than the low-level voltage, the light-emitting control unit enters an operation mode. The low-power carrier-controlled light-emitting diode lamp described in the first item of the scope of patent application, wherein after the sleep mode, when the voltage of the carrier light-emitting signal is greater than the low-level voltage, the light-emitting control unit leaves the sleep mode. The low-power carrier-controlled light-emitting diode lamp described in the first item of the scope of patent application, wherein the driving unit further includes: an oscillator coupled to the light-emitting control unit; wherein in the energy-saving mode, the oscillator A control signal is received, and the oscillator is controlled by the control signal to perform an oscillating operation with low power. The low-power carrier-controlled light-emitting diode lamp described in the first item of the scope of patent application, wherein the driving unit further includes: a latch unit coupled to an input side and an output inside the light-emitting diode lamp And an oscillator coupled to the light-emitting control unit and the latch unit; wherein in the energy-saving mode, the latch unit and the oscillator receive a control signal, and the oscillator is controlled by the control signal , Stop the oscillating operation, the latch unit is controlled by the control signal to provide timing operation. The low-power carrier-controlled light-emitting diode lamp described in item 4 or item 5 of the scope of patent application, wherein the driving unit further includes: a current detection unit coupled to the light-emitting control unit to generate the control signal . As described in item 5 of the scope of patent application, the low-power carrier-controlled light-emitting diode lamp, wherein the latch unit is a charging and discharging circuit including a resistor and a capacitor. For the low-power carrier-controlled light-emitting diode lamp described in item 5 of the scope of patent application, the latch unit is a timing circuit. The low-power carrier-controlled light-emitting diode lamp described in the first item of the scope of patent application, wherein the driving unit further includes: an address signal processing unit, coupled to the light-emitting control unit, and memorizes a light-emitting address, The address signal processing unit receives the address signal transmitted from the light emitting control unit for comparison. When the address signal matches the light emitting address, the light emitting control unit drives the light emitting device according to the light emitting command content of the carrier light emitting signal. The polar body glows. For the low-power carrier-controlled light-emitting diode lamp described in item 9 of the scope of patent application, the driving unit further includes: One-bit address burning unit, coupled to the address signal processing unit; wherein the carrier light signal includes a burning start signal and a burning address signal; when the address burning unit receives the burning start signal , The address burning unit writes the light-emitting address into the address signal processing unit according to the burning command content of the burning address signal. The low-power carrier-controlled light-emitting diode lamp described in item 6 of the scope of patent application, wherein the driving unit further includes: a discharge unit coupled to the current detection unit; when the discharge unit receives the current detection When the carrier light signal transmitted by the measuring unit, the discharging unit starts to discharge the DC working power. The low-power carrier-controlled light-emitting diode lamp described in item 5 of the scope of patent application, wherein the driving unit further includes: a power capacitor coupled to the light-emitting control unit, the latch unit and the light-emitting diode . A carrier-controlled light-emitting diode string comprising: a power cord; a controller coupled to the power cord; and at least one light-emitting diode lamp, the light-emitting diode lamp is as the first item in the scope of patent application To the low-power carrier-controlled light-emitting diode lamp described in any one of item 12; the light-emitting diode lamp is coupled to the controller through the power cord, and receives the transmission from the controller through the power cord The DC working power and the carrier light signal. For the carrier-controlled light-emitting diode string described in item 13 of the scope of patent application, the controller includes: a rectifier unit coupled to the power cord to provide the DC operating power; and a switch connected to the power cord With the light-emitting diode lamp; and A control unit is coupled to the rectifier unit and the switch, wherein when the control unit controls the switch to be turned on, the DC working power forms a power supply loop for powering the light-emitting diode lamp through the power line; wherein, when the control unit When the carrier light-emitting signal is to be generated, the control unit continuously switches the switch on and off according to the light-emitting command content of the carrier light-emitting signal, so that the DC operating power of the power line forms a complex pulse wave to combine to form the carrier light-emitting signal, And it is transmitted to the light-emitting diode lamp through the power cord. According to the carrier-controlled light-emitting diode string of claim 14 in the scope of patent application, the controller further includes: a discharge circuit, which is coupled to the power line and the control unit, and when the switch is turned off, the controller The discharging circuit is driven to receive the DC working power, and starts to discharge the DC working power. For the carrier-controlled light-emitting diode string described in item 14 of the scope of patent application, the controller further includes: a voltage adjustment capacitor coupled to the power line. When the switch is turned off, the voltage adjustment capacitor The LED lamp provides the DC working power.

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