TWI724917B - Light-emitting diode module and light-emitting diode lamp string with sleep mode - Google Patents

Abstract

A light-emitting diode module with sleep mode includes detection circuit, driving circuit and at least one light-emitting diode. A control unit of the driving circuit obtains and stores a light-emitting command according to a light-emitting driving signal, and controls a light-emitting behavior of the at least one light-emitting diode according to the light-emitting command. When the driving circuit knows that the light-emitting driving signal has dropped to less than a first threshold value through a first detection signal provided by the detection circuit, the driving circuit performs a signal identification of the light-emitting driving signal. When the driving circuit learns that the light-emitting driving signal drops to less than a second threshold value through a second detection signal provided by the detection circuit, the driving circuit enters a sleep mode from a working mode, and reduces a discharge speed of the light-emitting driving signal to a minimum.

Description

Light-emitting diode module with sleep mode and light-emitting diode string

The present invention relates to a conversion device with damping control and a damping control operation method thereof, in particular to a conversion device and operation method that can reduce the rising slope when the power switch of the converter is switched.

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 LED light string basically includes a plurality of LED modules (usually with a plurality of lights inside) and a control module for driving the LED modules. The control module is electrically connected to the light-emitting diode module, and by providing the required power to the light and a light-emitting drive signal with light-emitting commands, it is controlled in a point-controlled or synchronous manner to realize a variety of light-emitting diode lamps The effect and change of the light output.

With the advancement of technology, the light-emitting drive signal with light-emitting command 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 conducive to the design of the control circuit. However, the power consumption of the analog circuit in the light-emitting diode module is relatively large when it is working, which makes it impossible to reduce the overall power consumption of the light-emitting diode string. In addition, the carrier technology requires the second voltage as the signal voltage.

Therefore, how to design a light-emitting diode module and light-emitting diode string with a sleep mode, using the most streamlined circuit that eliminates the external signal voltage and reducing power consumption to achieve the power line carrier and transmit the signal, and Turning off the LED module when it does not need to work in order to save the overall power consumption of the LED module and the LED string is a major subject that the creators of this project want to study.

In order to solve the above problems, the present invention provides a light emitting diode module with a sleep mode to overcome the problems of the conventional technology. Therefore, the light-emitting diode module with sleep mode of the present invention includes a detection circuit that receives the light-emitting driving signal through the power line. The driving circuit receives the light-emitting driving signal and is coupled to the detection circuit. The driving circuit includes a control unit coupled to the detection circuit. And at least one light emitting diode, coupled to the control unit. Wherein, the control unit obtains and stores the light-emitting command according to the light-emitting drive signal, and controls the light-emitting behavior of the light-emitting diode according to the light-emitting command; the drive circuit knows that the light-emitting drive signal drops below the first detection signal provided by the detection circuit The first threshold, the driving circuit performs signal identification of the light-emitting driving signal, and when the light-emitting driving signal has completed the signal identification, the driving circuit enters from the working mode Enter sleep mode; when the light-emitting driving signal drops below the second threshold, the driving circuit reduces the discharge speed of the light-emitting driving signal.

In one embodiment, the driving circuit knows through the second detection signal that the light-emitting driving signal has risen to be greater than or equal to the second threshold, and the driving circuit returns from the sleep mode to the working mode.

In one embodiment, the detection circuit includes a voltage divider circuit that receives the light-emitting driving signal. The first comparator receives the first reference voltage and is coupled to the voltage divider circuit. And the second comparator, which receives the second reference voltage and is coupled to the voltage divider circuit. Wherein, the first comparator provides the first detection signal according to the voltage division value of the first reference voltage and the corresponding light-emitting drive signal, and the second comparator provides the first detection signal according to the voltage division value of the second reference voltage and the corresponding light-emitting drive signal 2. Detection signal.

In one embodiment, the detection circuit includes a first resistor, one end of which receives the light-emitting drive signal, and the other end of the first reference voltage. The first switch includes an input terminal, an output terminal and a control terminal. The input terminal receives the light-emitting drive signal, and the control terminal is coupled to the other terminal of the first resistor. And a voltage divider circuit, which is coupled to the output terminal of the first switch and the control unit. Wherein, the voltage divider circuit divides the voltage at the output terminal of the first switch to provide a first detection signal and a second detection signal.

In one embodiment, the driving circuit further includes an oscillator, which receives the light-emitting driving signal, and is coupled to the control unit. Among them, in the working mode, the oscillator provides the clock signal to the control unit according to the light-emitting drive signal; in the sleep mode, the sleep signal provided by the control unit turns off the oscillator, so that the oscillator does not provide the clock signal to the control unit. At the same time, analog lines are also closed.

In one embodiment, the oscillator includes a first inverter including an input terminal, an output terminal, and a power terminal. The input terminal is coupled to one end of the second resistor and one end of the first capacitor, and the output terminal is coupled to the second resistor. The other end, and the power end receives the light-emitting drive signal and the sleep signal. And the second inverter, including the input terminal, The output terminal and the power terminal, the input terminal is coupled to the other terminal of the first inverter and the second resistor, the output terminal is coupled to the other terminal of the first capacitor and the control unit, and the power terminal receives the light-emitting drive signal and the sleep signal.

In one embodiment, the driving circuit includes a latch circuit that receives the light-emitting driving signal and the first detection signal. Wherein, when the latch circuit learns from the first detection signal that the light-emitting drive signal is less than the first threshold for a time greater than or equal to the duration, the latch signal provided by the latch circuit causes the control unit to change the identified light-emitting drive signal Save as a light command.

In one embodiment, the control unit includes a logic circuit coupled to the detection circuit. And the register, coupled to the logic circuit. The latch circuit is composed of a logic gate and is integrated in the logic circuit; when the light-emitting drive signal is less than the first threshold for a time greater than or equal to the duration, the latch signal provided by the logic gate causes the logic circuit to notify the register The identified light-emitting drive signal is stored as a light-emitting command.

In an embodiment, the latch circuit includes: a second switch including an input terminal, an output terminal, and a control terminal. The output terminal is coupled to the power line and one end of the second capacitor, and the input terminal is coupled to the other end of the second capacitor and the second capacitor. One end of the three resistors and the control unit, and the control end receives the first detection signal. And the third switch includes an input terminal, an output terminal and a control terminal, the input terminal is coupled to the other terminal of the second resistor, the output terminal is coupled to the ground point, and the control terminal receives the first detection signal.

In one embodiment, the latch circuit includes: a second switch including an input terminal, an output terminal, and a control terminal. The output terminal is coupled to the power line, the input terminal is coupled to one end of the third resistor, and the control terminal receives the first detection Signal. And the third switch, including an input end, an output end and a control end, the input end is coupled to the other end of the second resistor, one end of the second capacitor and the control unit, the output end is coupled to the other end of the second capacitor and the ground point, and The control terminal receives the first detection signal.

In one embodiment, the driving circuit includes a discharge circuit, which receives the second detection signal and is coupled to the power line. Wherein, the discharge circuit learns from the second detection signal that the light-emitting drive signal is less than the second threshold, the discharge circuit reduces the discharge speed of the light-emitting drive signal.

In one embodiment, the discharge circuit includes a discharge switch including an input terminal, an output terminal, and a control terminal. The input terminal is coupled to the power line, the output terminal is coupled to the ground point, and the control terminal receives the second detection signal.

In order to solve the above-mentioned problems, the present invention provides a light-emitting diode string with a sleep mode to overcome the problems of the prior art. Therefore, the light-emitting diode light string with sleep mode of the present invention includes a power cord that receives a DC working voltage. And a control module, coupled to the power cord, and including a power switch, coupled to the power cord. And the controller, coupled to the power switch. And at least one light-emitting diode module, at least one light-emitting diode module is coupled to the control module through the power line, and receives the light-emitting driving signal and the DC working voltage transmitted by the control module through the power line; wherein the controller controls When the power switch is turned on, the DC operating voltage forms a power supply loop for powering at least one light-emitting diode module through the power line; when the controller wants to generate light belonging to the light-emitting diode module of the at least one light-emitting diode module When driving the signal, the controller continuously switches the power switch on and off according to the light-emitting command, so that the DC operating voltage of the power line forms a complex pulse wave to combine to form a light-emitting drive signal, which is transmitted to the light-emitting diode module through the power line.

The main purpose and effect of the present invention is that when the drive circuit is in sleep mode, the drive circuit does not work (that is, it mainly shuts off the oscillator and the circuit and analog circuit controlled by the clock signal provided by the oscillator to turn off The main power-consuming components of the driving circuit), thereby achieving the effect of saving power consumption of the light-emitting diode module.

In order to have a better understanding of the technology, means and effects adopted by the present invention to achieve the intended purpose, please refer to the following detailed description and drawings of the present invention. I believe the purpose, features and effects of the present invention The characteristics can be obtained from this in-depth and specific understanding, but the accompanying drawings are only provided for reference and explanation, and are not used to limit the present invention.

100, 100’: LED string

10: Power cord

20: Control module

SW: Power switch

202: Controller

30-1~30-n: LED module

302, 302’: Detection circuit

302A: Voltage divider circuit

Ra, Rb: voltage divider resistance

302B: first comparator

302C: second comparator

(+): The first input

(-): second input

O: output

R1: first resistance

Q1: The first switch

304: drive circuit

3042: Oscillator

In1: first inverter

In2: second inverter

R2: second resistor

C1: The first capacitor

3044, 3044’, 3044’’: latch circuit

Q2: The second switch

Q3: The third switch

C2: second capacitor

R3: third resistor

3046: Discharge circuit

Q4: Discharge switch

R4: Fourth resistor

304A: Control unit

304A-1: Logic circuit

AND: and gate

304A-2: register

304A-3: Drive

B: Buffer gate

306: LED

C: Energy storage capacitor

40: Rectifier

X: input

Y: output

Z: control end

P: power terminal

Vac: Input power

Vdc: DC working voltage

Vm: minimum working voltage

Vref1: the first reference voltage

Vref2: second reference voltage

Sd: Light-emitting drive signal

Sde: Light-emitting drive signal after identification

Pu: pulse wave

Ssw: Switch signal

S1: The first detection signal

S2: Second detection signal

CLK: Clock signal

Ss: Sleep signal

Sl: latch signal

Se: complete signal

Cl: glow command

Clo: External glow command

V1: The first threshold

V2: second threshold

Th: duration

t0~t4: time

A: Node

1A is a circuit block diagram of the first embodiment of the light-emitting diode string with sleep mode of the present invention; FIG. 1B is the circuit block diagram of the second embodiment of the light-emitting diode string with sleep mode of the present invention; FIG. 1C Fig. 2A is a circuit block diagram of a light-emitting diode module with a sleep mode of the present invention; Fig. 2B is a schematic diagram of one of the pulse waveforms of the light-emitting driving signal of the present invention; Fig. 2C is Fig. 3A is a schematic circuit diagram of the first embodiment of the detection circuit of the present invention; Fig. 3B is a schematic circuit diagram of the second embodiment of the detection circuit of the present invention; Fig. 4 is an oscillator of the present invention Fig. 5A is a circuit diagram of the first embodiment of the latch circuit of the present invention; Fig. 5B is a circuit diagram of the second embodiment of the latch circuit of the present invention; Fig. 5C is the circuit of the third embodiment of the latch circuit of the present invention Schematic; and Figure 6 is a schematic circuit diagram of the discharge circuit of the present invention.

The technical content and detailed description of the present invention are described as follows in conjunction with the drawings: Please refer to FIG. 1A for the circuit block diagram of the first embodiment of the light-emitting diode string with sleep mode according to the present invention. The light-emitting diode string 100 includes a power cord 10, a control module 20, at least one light-emitting diode module 30-1~30-n, and a rectifier 40. The rectifier 40 is coupled to the power cord 10 and receives the input power Vac. In order to rectify the input power Vac into a DC working voltage Vdc. The control module 20 receives the DC working voltage Vdc, and controls the light-emitting behavior of at least one light-emitting diode module 30-1-30-n. Among them, the light-emitting behavior is, for example, but not limited to, color change, light-off (dark) mode, light-off frequency... and so on. The control module 20 is coupled to the power line 10, and is coupled to the light-emitting diode modules 30-1 to 30-n through the power line 10. The light-emitting diode modules 30-1 to 30-n are coupled in series or in parallel (this embodiment is shown in series), and receive the light-emitting drive signal Sd transmitted by the control module 20 through the power line 10 With DC working voltage Vdc. Among them, the DC working voltage Vdc can be obtained by installing a DC converter (not shown) in the front stage, or the DC working voltage Vdc can be obtained by installing a battery in the LED string 100.

Specifically, the control module 20 includes a power switch SW and a controller 202. The input terminal X and the output terminal Y of the power switch SW are coupled to the power line 10, and the control terminal Z of the power switch SW is coupled to the controller 202. The controller 202 receives the DC working voltage Vdc through the power line 10, and provides a switch signal Ssw to control the on and off of the power switch SW. When the controller 202 controls the power switch SW to be turned on, the DC operating voltage Vdc forms a power supply loop for supplying power to the light emitting diode modules 30-1 to 30-n through the power line 10. When the controller 202 wants to generate a light-emitting drive signal belonging to a certain light-emitting diode module 30-1 (assumed to be the first light-emitting diode module) among the light-emitting diode modules 30-1~30-n For Sd, the controller continuously switches the power switch SW on and off according to the light-emitting command belonging to the light-emitting diode module 30-1, so that the DC operating voltage Vdc on the power line 10 forms a complex pulse wave to be combined into a light-emitting diode The body module 30-1 emits a driving signal Sd, which is transmitted to the light-emitting diode module 30-1 through the power line 10.

The controller 202 can be wired (wired) or wireless (wireless). In addition to its built-in lighting command, it can also receive an external lighting command Clo from the outside, so that the controller 202 can control according to the content of the lighting command or the external lighting command Clo The turning on and off of the power switch SW generates a light-emitting drive signal Sd, and the light-emitting diode modules 30-1 to 30-n are controlled to emit light through the light-emitting drive signal Sd. For example, the user can transmit the external lighting command Clo to the controller 202 in a wired manner by operating a computer, so that the controller 202 can perform lighting control according to the external lighting command Clo. Alternatively, the user can wirelessly transmit the external lighting command Clo to the controller 202 by operating a mobile phone or a wearable device, so that the controller 202 can perform lighting control according to the external lighting command Clo. However, the method of transmitting the external light-emitting command Clo and the operated user device does not limit the present invention.

Taking the controller 202 to correspondingly transmit the light-emitting drive signal Sd belonging to the light-emitting diode module 30-1 according to the light-emitting command belonging to the light-emitting diode module 30-1 as an example, the controller 202 can control the power switch The SW switch generates a notification signal for command transmission. When the LED modules 30-1~30-n receive this notification signal, they will proceed to the command receiving stage. Then, the controller 202 converts the light-emitting command belonging to the light-emitting diode module 30-1 into a light-emitting drive signal Sd by controlling the on and off of the power switch SW. The pulse wave of the light-emitting drive signal Sd can form the light-emitting drive signal Sd with address data in the form of "0" and "1" plus the brightness of the LED light "11" and the color "10". The light-emitting drive signal Sd includes, for example, but not limited to, 10 pulses, and the address data corresponds to the address of the first light-emitting diode module 30-1. When the light emitting diode module 30-1~30-n receives the address data, the light emitting diode module 30-1 knows that the successively transmitted light-emitting drive signal Sd belongs to its own light-emitting drive signal Sd, so as to emit light Drive the signal Sd for signal identification. After the nine pulses are recognized, the controller 202 generates a notification signal (ie the last pulse) that the command transmission is completed by controlling the power switch SW to switch, and the light-emitting diode module 30-1 generates a lock based on the notification signal. Save the signal and store the lighting commands corresponding to the 9 pulses, and according to the stored The light command produces light-emitting behavior. It is worth mentioning that the light-emitting diode module 30-1 has a variety of control methods, but its spirit is roughly the same as the above-mentioned control method, and the control methods of the light-emitting diode module 30-2~30-n are also It is the same as the light-emitting diode module 30-1, and will not be repeated here.

Please refer to FIG. 1B for the circuit block diagram of the second embodiment of the light-emitting diode string with sleep mode according to the present invention, and in conjunction with FIG. 1A. The difference between the LED string 100' of this embodiment and the LED string 100 of FIG. 1A is that the LED string 100' does not include the rectifier 40, and the LED module 30-1 ~30-n is coupled in parallel. The control module 20 of the light-emitting diode string 100 receives the DC working voltage Vdc provided from the outside, and controls the light-emitting behavior of at least one light-emitting diode module 30-1-30-n. It is worth mentioning that, in an embodiment of the present invention, the components not mentioned in the light-emitting diode string 100', the coupling relationship of the components, and the control method are the same as those in FIG. 1A, and will not be repeated here.

Please refer to FIG. 1C for a schematic diagram of the waveform of the light-emitting driving signal of the present invention, and refer to FIGS. 1A to 1B for complex cooperation. The light-emitting drive signal Sd of this embodiment is indicated by a pulse wave of 10 cycles. When the controller 202 controls the power switch SW to turn on, the DC operating voltage Vdc forms a pair of light-emitting diode modules 30-1~30 through the power line 10 -n power supply loop for power supply. When the controller 202 wants to generate the light-emitting drive signal Sd, the controller continuously switches the power switch SW on and off according to the light-emitting command, so that the DC working voltage Vdc on the power line 10 is switched to form a pulse wave Pu of 10 cycles. The light-emitting drive signal Sd is transmitted to the light-emitting diode module 30-1 through the power line 10. Among them, the last pulse wave Pu is at the low level for a long time. When the light emitting diode module 30-1 detects that the pulse wave Pu is at the low level for a long time, this pulse wave Pu is the command transmission Notification signal of completion. That is, the time of the last pulse wave Pu at the low level exceeds the duration Th of the first 9 pulse waves at the low level. At this time, the light-emitting diode modules 30-1-30-n generate a latch signal according to the notification signal to store the light-emitting commands corresponding to the 9 pulse waves Pu, and generate light-emitting behaviors according to the stored light-emitting commands.

Please refer to FIG. 2A for the circuit block diagram of the light emitting diode module with sleep mode of the present invention, and FIG. 2B for the pulse waveform diagram of one of the light emitting drive signals of the present invention. Please refer to FIGS. 1A~1B in combination with repeated reference. Figure 2A, 2B. Each light-emitting diode module 30-1~30-n includes a detection circuit 302, a driving circuit 304, and at least one light-emitting diode 306 (in this embodiment, three light-emitting diodes 306 are used as an illustrative example). Example), and the driving circuit 304 is coupled to the detection circuit 302 and the light emitting diode 306. The detection circuit 302 receives the DC operating voltage Vdc or the light-emitting driving signal Sd through the power line 10, and provides the first detection signal S1 and the second detection signal S2 to the driving circuit 304 according to the light-emitting driving signal Sd. The driving circuit 304 receives the DC working voltage Vdc or the light-emitting driving signal Sd through the power line 10. When the driving circuit 304 receives the DC working voltage Vdc, the driving circuit 304 operates in the working mode. At this time, the control unit 304A in the driving circuit 304 controls the light-emitting behavior of the light-emitting diode 306 according to the light-emitting command Cl, which is obtained by the light-emitting drive signal Sd previously provided by the controller 202. In an embodiment of the present invention, the detection circuit 302 and the driving circuit 304 in the light emitting diode modules 30-1-30-n may be controllers packaged together, but not limited to this. In other words, the entire light-emitting diode modules 30-1-30-n can be packaged together according to actual needs, or the internal components of the light-emitting diode modules 30-1-30-n can be set independently.

When the driving circuit 304 receives the light-emitting driving signal Sd, the driving circuit 304 adjusts the operation mode according to the first detection signal S1 and the second detection signal S2. Specifically, as shown in FIG. 2B, the power switch SW is turned off at time t0, so that the light-emitting driving signal Sd starts to decrease. When the driving circuit 304 knows through the first detection signal S1 that the light-emitting driving signal Sd drops below the first threshold V1 (time t1), the driving circuit 304 performs signal identification of the light-emitting driving signal Sd. At this time, the driving circuit 304 is still operating in the working mode, and the signal identification of the light-emitting driving signal Sd is completed at time t2. After the light-emitting driving signal Sd is completed (and after time t2), the driving circuit 304 enters the sleep mode from the working mode. When the driving circuit 304 knows through the second detection signal S2 that the light-emitting driving signal Sd drops below the second threshold V2 (Time t3), the driving circuit 304 reduces the discharge speed of the light-emitting driving signal Sd (that is, the slope of the voltage drop changes). Finally, at time t4, the voltage of the pulse wave rises from less than the second threshold value V2 to greater than the first threshold value V1, so that the driving circuit 304 returns from the sleep mode to the working mode. At this time, the driving circuit 304 is awakened and enters the working mode. Therefore, it can be seen that when the light-emitting drive signal Sd is identified and the pulse voltage rises from less than the second threshold value V2 to greater than the first threshold value V1, the driving circuit 304 is in the sleep mode, except for the driving circuit 304. In working mode.

Furthermore, as shown in FIG. 2A, the driving circuit 304 includes an oscillator 3042, a latch circuit 3044, a discharge circuit 3046, and a control unit 304A, and the control unit 304A includes a logic circuit 304A-1, a register 304A-2, and a driver 304A-3. When the driving circuit 304 is in the working mode, the above-mentioned components all operate by receiving the DC working voltage Vdc or the light-emitting driving signal Sd. Since the clock signal CLK generated by the oscillator 3042 is closely related to the operation of the control unit 304A, and the oscillator 3042 is the main power-consuming component when the driving circuit 304 is in working mode, the main purpose and effect of the present invention is to drive When the circuit 304 is in the sleep mode, the driving circuit 304 does not work (that is, the oscillator 3042 is mainly turned off to turn off the main power consumption components of the driving circuit 304) and the analog circuit. And because the oscillator 3042 is turned off, some of the circuits in the control unit 304A that are operated by the clock signal CLK (such as but not limited to the driver 304A-3, the logic circuit 304A-1 and some circuits of the register 304A-2) At the same time, it is turned off to save power consumption of the light-emitting diode module 30-1~30-n. It is worth mentioning that since the operation of the latch circuit 3044 does not use the clock signal CLK, when the oscillator 3042 is turned off, the latch circuit 3044 can still provide a latch signal according to the first detection signal S1 in the sleep mode. Sl. In addition, the logic circuit 304A-1 is a digital passive component. Therefore, even when the driving circuit 304 is in the sleep mode, as long as the voltage of the light-emitting driving signal Sd pulse rises from less than the second threshold V2 to greater than the first threshold V1. When the second detection signal S2 changes, the passive logic circuit 304A-1 can still wake up all the components in the driving circuit 304 through the output of the signal.

Referring again to FIG. 2A, the control unit 304A receives the DC working voltage Vdc or the light-emitting driving signal Sd as a power source required for operation. The logic circuit 304A-1 is coupled to the detection circuit 302, and performs signal identification of the light-emitting driving signal Sd according to the first detection signal S1, and provides a sleep signal Ss to the oscillator 3042 according to the second detection signal S2. The register 304A-2 is coupled to the logic circuit 304A-1, and when the logic circuit 304A-1 receives the latch signal S1, the logic circuit 304A-1 provides the identified light-emitting drive signal Sde to the register 304A- 2. Make the register 304A-2 store it as the light-emitting command Cl. The driver 304A-3 is coupled to the register 304A-2 and the light-emitting diode 306, and the register 304A-2 controls the driver 304A-3 to drive the light-emitting diode 306 according to the light-emitting command Cl, so that the light-emitting diode 306 emits light behavior. It is worth mentioning that the control unit 304A of the present invention provides the multiple pulses in the light-emitting drive signal Sd to the register 304A-2 for storage at one time, so that the register 304A-2 can store a complete light-emitting command at one time Cl, instead of receiving a pulse wave and adjusting the light-emitting behavior of the light-emitting diode 306 according to a single pulse wave, to avoid the situation that the light-emitting command Cl is easy to be mistaken and the light-emitting diode 306 has a wrong light-emitting behavior.

The oscillator 3042 receives the DC operating voltage Vdc or the light-emitting drive signal Sd, and is coupled to the control unit 304A and the logic circuit 304A-1 in the control unit 304A. In the working mode, the oscillator 3042 provides the clock signal CLK to the control unit 304A according to the DC operating voltage Vdc or the light-emitting drive signal Sd, so that some components (not shown) in the control unit 304A that require the clock signal CLK according to the clock Signal CLK to operate. In the sleep mode, the sleep signal Ss provided by the logic circuit 304A-1 according to the second detection signal S2 will turn off the oscillator 3042 and no longer provide the clock signal CLK to the control unit 304A. In this way, in the sleep mode, the oscillator 3042 with higher power consumption and some components that operate by the clock signal CLK stop operating, so as to save the power consumption of the light-emitting diode modules 30-1-30-n. In dormant mode When the mode returns to the working mode, the second detection signal S2 will change, so that the logic circuit 304A-1 adjusts the sleep signal Ss according to the change of the second detection signal S2, and then wakes up the oscillator 3042 through the provided sleep signal Ss . It is worth mentioning that in an embodiment of the present invention, in the sleep mode, the sleep signal Ss provided by the logic circuit 304A-1 according to the second detection signal S2 can not only turn off the oscillator 3042, but also turn off at the same time. In the driving circuit 304, other analog circuits (not shown in the figure) are turned on when the sleep mode returns to the working mode (not shown in the figure). For example, but not limited to, the sleep signal Ss can control part of the signal detection circuit, protection circuit, etc., to sleep or work. In this way, the power consumption of the light-emitting diode module 30-1~30-n can be more saved.

The latch circuit 3044 receives the DC operating voltage Vdc or the light-emitting drive signal Sd, and provides the latch signal S1 to the logic circuit 304A-1 according to the first detection signal S1. Specifically, the latch circuit 3044 uses the length of time to control the provided latch signal S1. When the pulse width in the light-emitting drive signal Sd is too short, the latch signal Sl provided by the latch circuit 3044 will prevent the logic circuit 304A-1 from providing the light-emitting command Cl to the register 304A-2. When the pulse width in the light-emitting driving signal Sd is long enough, it means that the time during which the light-emitting driving signal Sd is less than the first threshold value V1 is greater than or equal to the duration. At this time, the latch signal S1 provided by the latch circuit 3044 causes the logic circuit 304A-1 to notify the register 304A-2 according to the latch signal S1 to provide the identified light-emitting drive signal Sde to the register 304A-2 It is stored as the luminous command Cl.

The discharge circuit 3046 is coupled to the detection circuit 302 and the power line 10, and when the light-emitting driving signal Sd is less than the second threshold V2 according to the second detection signal S2, the discharging circuit 3046 reduces the discharge speed of the light-emitting driving signal Sd. Specifically, some control units 304A do not have the power-off memory function. This means that after the DC working voltage Vdc or the voltage value of the light-emitting drive signal Sd is too low, the data stored in the control unit 304A is cleared (such as but not limited to the light-emitting command Cl), so the light-emitting drive signal Sd The voltage value at the low level must be kept above the minimum operating voltage Vm (as shown in FIG. 2B) to prevent the control unit 304A from being reset due to the low voltage. Among them, the main purpose of the discharge circuit 3046 is to minimize the discharge speed of the light-emitting drive signal Sd as much as possible, so as not to cause the voltage value of the light-emitting drive signal Sd to drop too fast, and then it is easier to survive the last pulse Pu. Low level time (because the last pulse Pu has a long time at low level). The present invention utilizes the discharge circuit 3046 to reduce the discharge speed of the light-emitting driving signal Sd when the light-emitting driving signal Sd is less than the second threshold value V2, which can prevent the light-emitting driving signal Sd from discharging too fast and making the voltage value lower than the minimum operating voltage Vm.

The light-emitting diode modules 30-1-30-n further include an analog circuit 3046. The analog circuit 3046 receives a DC working voltage Vdc or a light-emitting driving signal Sd as a power source, and is coupled to the control unit 304A. The light-emitting diode modules 30-1~30-n are light strings with burning function, so each light-emitting diode module 30-1~30-n has its own burning data and address data. Digital and analog circuits, such as a light-emitting control unit responsible for light-emitting control, an address signal processing unit responsible for address signal processing, and an address burning unit responsible for address burning (not shown). In the sleep mode, the sleep signal Ss provided by the control unit 304A not only turns off the oscillator 3042, but also turns off the analog circuit 3046 to save power consumption of the LED modules 30-1-30-n.

The light emitting diode module 30-1~30-n further includes an energy storage capacitor C. The energy storage capacitor C is coupled between the input end and the output end of the light emitting diode module 30-1~30-n, and is used To stabilize the light-emitting diode module 30-1 when the DC working voltage Vdc or the light-emitting drive signal Sd is transmitted from the input end of the light-emitting diode module 30-1~30-n to the output end (through the power line 10) ~30-n The voltage at both ends (i.e. input and output) to reduce the LED module 30-1~30-n due to the voltage floating at both ends of the LED module 30-1~30 -n controls the instability of errors. It is worth mentioning that in one embodiment of the present invention, the energy storage capacitor C is only a stable It is used to determine the voltage at both ends of the light-emitting diode module 30-1~30-n. It is not a necessary component of the light-emitting diode module 30-1~30-n, so it is indicated by a dashed line.

Please refer to FIG. 2C for the logic diagram of the logic circuit of the present invention initiating the sleep mode. Please refer to FIGS. 1A~2B for complex cooperation. The logic circuit 304A-1, for example, but not limited to, can activate the sleep mode of the driving circuit 304 through a simple logic gate. As shown in FIG. 2C, an input terminal of the AND gate AND receives the signal identification completion signal Se of the light-emitting drive signal Sd. Whether the identification is completed or not can be determined by the logic circuit 304A-1 according to the input of the first detection signal S1. Get it by yourself. The other input of the gate AND receives the second detection signal S2, and when the completion signal Se and the second detection signal S2 are both 1, the gate AND provides a sleep signal Ss of 1 to the oscillator 3042 to oscillate The device 3042 is turned off. When one of the input terminals of the AND gate is not 1, the AND gate AND provides a sleep signal Ss of 0 to the oscillator 3042, so that the oscillator 3042 is awakened.

Please refer to FIG. 3A for a schematic circuit diagram of the first embodiment of the detection circuit of the present invention, and refer to FIGS. 1A~2B for multiple cooperation. The detection circuit 302 includes a voltage divider circuit 302A, a first comparator 302B, and a second comparator 302C, and the voltage divider circuit includes voltage divider resistors Ra and Rb. Among them, the circuit connection is for illustrative purposes only, and is not intended to limit the present invention. As long as the detection circuit 302 that can provide the first detection signal S1 and the second detection signal S2 according to the change of the light-emitting drive signal Sd, it should include Within the scope of the present invention. One end of the voltage dividing resistor Ra receives the DC working voltage Vdc or the light-emitting drive signal Sd, the other end of the voltage dividing resistor Ra is coupled to one end of the voltage dividing resistor Rb, and the other end of the voltage dividing resistor Rb is coupled to the ground point. The first comparator 302B and the second comparator 302C respectively include a first input terminal (+), a second input terminal (-) and an output terminal O, and the first input terminal of the first comparator 302B and the second comparator 302C (+) Coupled between the voltage divider resistors Ra and Rb. The second input terminal (-) of the first comparator 302B is coupled to the first reference voltage Vref1, and the second input terminal (-) of the second comparator 302C is coupled to the second reference voltage Vref2. DC working voltage Vdc or light-emitting drive signal Sd After the voltage divider resistors Ra and Rb divide the voltage, the node A between the voltage divider resistors Ra and Rb generates a voltage divider value. The first comparator 302B provides the first detection signal S1 at the output terminal O of the first comparator 302B according to the divided voltage value of the first reference voltage Vref1 and the corresponding light-emitting drive signal Sd, and the second comparator 302C according to the second reference The voltage Vref2 and the voltage division value corresponding to the light-emitting drive signal Sd provide a second detection signal S2 at the output terminal O of the second comparator 302C. Wherein, the voltage value of the first reference voltage Vref1 is greater than the voltage value of the second reference voltage Vref2.

When the voltage value of the light-emitting driving signal Sd is greater than the first reference voltage Vref1 and the second reference voltage Vref2, the first comparator 302B and the second comparator 302C output at a high level, so that the driving circuit 304 is in an operating mode. When the voltage value of the light-emitting driving signal Sd is between the first reference voltage Vref1 and the second reference voltage Vref2, the first comparator 302B outputs at a low level, and the second comparator 302C outputs at a high level. At this time, the driving circuit 304 performs signal identification of the light-emitting driving signal Sd. After the identification of the light-emitting driving signal Sd is completed (the voltage value of the light-emitting driving signal Sd is between the first reference voltage Vref1 and the second reference voltage Vref2), the driving circuit 304 enters the sleep mode from the working mode. When the voltage value of the light-emitting driving signal Sd is less than the first reference voltage Vref1 and the second reference voltage Vref2, the first comparator 302B and the second comparator 302C are output at low level, so that the driving circuit 304 reduces the discharge of the light-emitting driving signal Sd speed. It is worth mentioning that since the DC working voltage Vdc is a fixed voltage value, the first detection signal S1 compared by the first comparator 302B is also a fixed value. That is, only the light-emitting drive signal Sd with a pulse wave change will cause the comparison result of the first comparator 302B to change, and the second comparator 302C is the same.

Please refer to FIG. 3B for a schematic circuit diagram of the second embodiment of the detection circuit of the present invention, and refer to FIGS. 1A to 3A for multiple cooperation. The difference between the detection circuit 302' of this embodiment and the detection circuit 302 of FIG. 3A is that the detection circuit 302' includes a first resistor R1, a first switch Q1, and a voltage divider circuit 302A, and a voltage divider circuit 302A includes voltage divider resistors Ra and Rb. Among them, the circuit connection is for illustrative purposes only, and is not intended to limit the present invention. As long as the detection circuit 302 that can provide the first detection signal S1 and the second detection signal S2 according to the change of the light-emitting drive signal Sd, it should include Within the scope of the present invention. One end of the first resistor R1 receives the DC working voltage Vdc or the light-emitting drive signal Sd, and the other end of the first resistor R1 receives the first reference voltage Vref1. The first switch Q1 includes an input terminal X, an output terminal Y and a control terminal Z. The input terminal X of the first switch Q1 receives a DC working voltage Vdc or a light-emitting drive signal Sd, and the control terminal Z is coupled to the other end of the first resistor R1. One end of the voltage dividing resistor Ra is coupled to the output terminal Y of the first switch Q1, the other end of the voltage dividing resistor Ra is coupled to one end of the voltage dividing resistor Rb, and the other end of the voltage dividing resistor Rb is coupled to the ground point. The node between the voltage dividing resistor Ra and the output terminal Y of the first switch Q1 provides the first detection signal S1, and the node between the voltage dividing resistors Ra and Rb provides the second detection signal S2.

When the voltage value of the light-emitting driving signal Sd is greater than the first reference voltage Vref1, the first switch Q1 is turned on, and the first detection signal S1 and the second detection signal S2 are output at a high level, so that the driving circuit 304 is in an operating mode. When the voltage value of the light-emitting driving signal Sd is less than the first reference voltage Vref1, the first switch Q1 is turned on, the first detection signal S1 is output at a low level, and the second detection signal S2 is output at a high level. At this time, the driving circuit 304 performs signal identification of the light-emitting driving signal Sd. After the identification of the light-emitting driving signal Sd is completed (the voltage value of the light-emitting driving signal Sd is less than the first reference voltage Vref1 until the first switch Q1 is turned off), the driving circuit 304 enters the sleep mode from the working mode. When the voltage value of the light-emitting driving signal Sd is too low, the first switch Q1 is turned off, and the first detection signal S1 and the second detection signal S2 are output at a low level, so that the driving circuit 304 reduces the light-emitting driving signal Sd. It is worth mentioning that in digital circuits, the analog-to-digital signal needs to use a buffer gate to increase the signal strength. Therefore, a buffer gate B can be added to the output path of the first detection signal S1 and the second detection signal S2. , To increase the signal strength of the first detection signal S1 and the second detection signal S2.

Please refer to FIG. 4 for a schematic diagram of the circuit of the oscillator of the present invention, and refer to FIGS. 1A to 3B for complex cooperation. The oscillator 3042 includes a first inverter In1, a second inverter In2, a second resistor R2, and a first capacitor C1. The circuit connection is only for illustrative purposes, and is not intended to limit the present invention, as long as it can generate a clock signal. The CLK oscillator 3042 should be included in the scope of the present invention. The first inverter In1 includes an input terminal X, an output terminal Y, and a power terminal P. The input terminal X is coupled to one end of the second resistor R2 and one end of the first capacitor C1, and the output terminal Y is coupled to the second resistor R2 The other end of the power supply terminal P receives the light-emitting drive signal Sd and the sleep signal Ss. The second inverter In2 includes an input terminal X, an output terminal Y, and a power terminal P. The input terminal X is coupled to the other terminal of the first inverter In1 and the second resistor R2, and the output terminal Y is coupled to the other terminal of the first capacitor C1. One end is connected to the control unit 304A, and the power end P receives the light-emitting drive signal Sd and the sleep signal Ss. The first inverter In1 and the second inverter In2 are CMOS transistor circuit inverters. Through the design of different transistor sizes, and through the control of enabling and disabling, accurate control and low power consumption can be achieved. demand.

When in the working mode, the sleep signal Ss enables the first inverter In1 and the second inverter In2 in the oscillator 3042 to be enabled (as shown in FIG. 2B, before time t3 or after time t4), therefore, the oscillator The 3042 can operate at full power and provide the clock signal CLK. When it is detected that the light-emitting drive signal Sd falls below the second threshold value V2 (as shown in FIG. 2B, time t3~t4), the sleep signal Ss provided by the logic circuit 304A-1 controls the first inverter In1 and the second inverter The device In2 is in the disabled state to completely turn off the oscillator 3042 and enter the sleep mode. 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. 5A for a schematic diagram of the circuit of the first embodiment of the latch circuit of the present invention, and refer to FIGS. 1A to 4 for complex cooperation. The latch circuit 3044 includes a second switch Q2, a third switch Q3, a second capacitor C2, and a third resistor R3. The circuit connection mode is only for illustrative purposes and is not intended to limit the present invention, as long as it can be based on the first detection signal S1 The latch circuit 3044 that provides the latch signal Sl should be included in this In the category of invention. Specifically, the second switch Q2 includes an input terminal X, an output terminal Y, and a control terminal Z. The output terminal Y of the second switch Q2 is coupled to the power line 10 and one end of the second capacitor C2, and receives DC work through the power line 10 Voltage Vdc or light-emitting drive signal Sd. The input terminal X of the second switch Q2 is coupled to the other end of the second capacitor C2, one end of the third resistor R3 and the logic circuit 304A-1, and the control terminal Z of the second switch Q2 receives the first detection signal S1. The third switch Q3 includes an input terminal X, an output terminal Y, and a control terminal Z. The input terminal X of the third switch Q3 is coupled to the other end of the second resistor R2, the output terminal Y of the third switch Q3 is coupled to the ground point, and The control terminal Z of the three switch Q3 receives the first detection signal S1.

When the first detection signal S1 provided by the detection circuit 302 represents that the light-emitting drive signal Sd is greater than the first threshold V1 (as shown in FIG. 2B, before time t1), the second switch Q2 is turned off and the third switch Q3 is turned on. This enables the second capacitor C2 to store energy. When the light-emitting drive signal Sd decreases from greater than the first threshold value V1 to less than the first threshold value V1, the second switch Q2 is turned on and the third switch Q3 is turned off, so that the second capacitor C2 starts to discharge. When the time for the light-emitting drive signal Sd to be less than the first threshold value V1 is greater than or equal to the duration, the second capacitor C2 has discharged the internally stored energy to be lower than the predetermined value. At this time, the latch signal S1 provided by the node between the second capacitor C2 and the second resistor R2 causes the logic circuit 304A-1 to notify the register 304A-2 to store the identified light-emitting drive signal Sde as the light-emitting command Cl. It is worth mentioning that a buffer gate B can also be added to the output path of the latch signal Sl, and its effect is as described in FIG. 3B.

Please refer to FIG. 5B for a schematic circuit diagram of the second embodiment of the latch circuit of the present invention, and refer to FIGS. 1A to 5A for complex cooperation. The difference between the latch circuit 3044' of this embodiment and the latch circuit 3044 of FIG. 5A lies in the coupling position and control method of the second switch Q2, the third switch Q3, the second capacitor C2, and the third resistor R3. Among them, the circuit connection mode is for illustrative purposes only, and is not intended to limit the present invention. As long as the latch circuit 3044' that can provide the latch signal S1 according to the change of the first detection signal S1, it should be included in the scope of the present invention. . Specifically, the output terminal Y of the second switch Q2 is coupled to the power line 10, and the output terminal Y of the second switch Q2 is The line 10 receives the DC working voltage Vdc or the light-emitting driving signal Sd. The input terminal X of the second switch Q2 is coupled to one end of the third resistor R3, and the control terminal Z of the second switch Q2 receives the first detection signal S1. The input end of the third switch Q3 is coupled to the other end of the second resistor R2, one end of the second capacitor C2 and the logic circuit 304A-1, and the output end Y of the third switch Q3 is coupled to the other end of the second capacitor C2 and the ground point , And the control terminal Z of the third switch Q3 receives the first detection signal S1.

When the first detection signal S1 provided by the detection circuit 302 represents that the light-emitting drive signal Sd is greater than the first threshold V1 (as shown in FIG. 2B, before time t1), the second switch Q2 is turned on, and the third switch Q3 is turned off. This enables the second capacitor C2 to store energy. When the light-emitting driving signal Sd decreases from greater than the first threshold value V1 to less than the first threshold value V1, the second switch Q2 is turned off, and the third switch Q3 is turned on, so that the second capacitor C2 starts to discharge. When the time for the light-emitting drive signal Sd to be less than the first threshold value V1 is greater than or equal to the duration, the second capacitor C2 has discharged the internally stored energy to be lower than the predetermined value. At this time, the latch signal S1 provided by the node between the second resistor R2 and the second capacitor C2 causes the logic circuit 304A-1 to notify the register 304A-2 to store the identified light-emitting drive signal Sde as the light-emitting command Cl. It is worth mentioning that a buffer gate B can also be added to the output path of the latch signal Sl, and its effect is as described in FIG. 3B.

Please refer to FIG. 5C for a schematic circuit diagram of the third embodiment of the latch circuit of the present invention, and refer to FIGS. 1A to 5B for complex cooperation. The latch circuit 3044" of this embodiment differs from the latch circuit 3044 of FIG. 5A in that the latch circuit 3044" is composed of logic gates, which can be formed by logic gates such as AND gates, OR gates, and reverse gates. , And integrated in the logic circuit 304A-1. When the light-emitting drive signal Sd is less than the first threshold value V1 for a time greater than or equal to the duration, the latch signal S1 provided by the logic gate of the latch circuit 3044″ causes the output of the gate AND in the logic circuit 304A-1 to change . According to the change, the logic circuit 304A-1 notifies the register 304A-2 to store the identified light-emitting drive signal Sde as the light-emitting command Cl. It is worth mentioning that the output of the gate AND may be judged by additional logic gates (not shown in the figure) (such as but not limited to Therefore, the protection logic circuit, etc.) can output the identified light-emitting drive signal Sde, so the output of the gate AND to the identified light-emitting drive signal Sde is represented by a dotted line.

Please refer to FIG. 6 for a schematic circuit diagram of the discharge circuit of the present invention, and refer to FIGS. 1A to 5C for complex cooperation. The discharging circuit 3046 includes a discharging switch Q4, and the discharging switch Q4 has an input terminal X, an output terminal Y, and a control terminal Z. The input terminal of the discharge switch Q4 is coupled to the power line 10, the output terminal Y of the discharge switch Q4 is coupled to the ground point, and the control terminal Z of the discharge switch Q4 receives the second detection signal S2. The circuit connection mode is only for illustrative purposes, and is not intended to limit the present invention. As long as the discharge speed of the light-emitting drive signal Sd can be adjusted according to the change of the second detection signal S2, it should be included in the scope of the present invention. When the light-emitting drive signal Sd is greater than the second threshold V2, the second detection signal S2 controls the discharge switch Q4 to turn on, so that the light-emitting drive signal Sd generates a current path to the ground and discharges quickly. When the light-emitting drive signal Sd is less than the second threshold V2, the second detection signal S2 controls the discharge switch Q4 to turn off, so that the light-emitting drive signal Sd is floating (floating), so that the light-emitting drive signal Sd is turned off by the discharge switch Q4. Reduce the discharge speed. It is worth mentioning that in order to avoid excessive current flowing to the ground through the discharge switch Q4 when the discharge switch Q4 is turned on, a fourth resistor R4 can be installed on the current path from the light-emitting drive signal Sd to the ground point to limit the current path. The magnitude of the current.

However, 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 should be referred to the following application The scope of the patent shall prevail. All embodiments that conform to the spirit of the scope of the patent application of the present invention and similar variations 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 it. Changes or modifications can be covered in the following patent scope of this case.

10: Power cord

30-1~30-n: LED module

302: Detection Circuit

304: drive circuit

3042: Oscillator

3044: latch circuit

304A: Control unit

304A-1: Logic circuit

304A-2: register

304A-3: Drive

306: LED

C: Energy storage capacitor

Vdc: DC working voltage

Sd: Light-emitting drive signal

Sde: Light-emitting drive signal after identification

S1: The first detection signal

S2: Second detection signal

CLK: Clock signal

Ss: Sleep signal

Sl: latch signal

Cl: glow command

Claims (13)

A light-emitting diode module with a sleep mode, comprising: a detection circuit that receives a light-emitting drive signal through a power line; a drive circuit that receives the light-emitting drive signal and is coupled to the detection circuit, the drive circuit It includes: a control unit coupled to the detection circuit; and at least one light-emitting diode coupled to the control unit; wherein the control unit obtains and stores a light-emitting command according to the light-emitting drive signal, and controls according to the light-emitting command The light-emitting behavior of the light-emitting diode; when the driving circuit knows that the light-emitting driving signal drops below a first threshold through a first detection signal provided by the detection circuit, the driving circuit performs the light-emitting driving signal Signal identification, and when the light-emitting drive signal has completed signal identification, the drive circuit enters a sleep mode from a working mode; the drive circuit learns the light-emitting through a second detection signal provided by the detection circuit When the driving signal drops below a second threshold, the driving circuit reduces the discharge speed of the light-emitting driving signal. The light-emitting diode module described in the first item of the scope of patent application, wherein the driving circuit knows through the second detection signal that the light-emitting driving signal rises from less than the second threshold to greater than the first threshold , The driving circuit returns to the working mode from the sleep mode. According to the light-emitting diode module described in claim 1, wherein the detection circuit includes: a voltage divider circuit to receive the light-emitting drive signal; a first comparator to receive a first reference voltage, and Coupled to the voltage divider circuit; and a second comparator, which receives a second reference voltage, and is coupled to the voltage divider circuit; Wherein, the first comparator provides the first detection signal according to the first reference voltage and the voltage division value corresponding to the light-emitting driving signal, and the second comparator provides the first detection signal according to the second reference voltage and the corresponding light-emitting driving signal And provide the second detection signal. According to the light-emitting diode module described in claim 1, wherein the detection circuit includes: a first resistor, one end of which receives the light-emitting drive signal, and the other end of a first reference voltage; a first switch, It includes an input terminal, an output terminal, and a control terminal. The input terminal receives the light-emitting drive signal. The control terminal is coupled to the other terminal of the first resistor; and a voltage divider circuit is coupled to the first switch. The output terminal and the control unit; wherein, the voltage divider circuit divides the voltage of the output terminal of the first switch to provide the first detection signal and the second detection signal. According to the light-emitting diode module described in claim 1, wherein the driving circuit further includes: an oscillator that receives the light-emitting driving signal and is coupled to the control unit; wherein, in the working mode, the The oscillator provides a clock signal to the control unit according to the light-emitting drive signal; in the sleep mode, a sleep signal provided by the control unit turns off the oscillator and the analog circuit, so that the oscillator does not provide the clock signal To the control unit. According to the light-emitting diode module described in item 5 of the scope of patent application, the oscillator includes: a first inverter, including an input terminal, an output terminal and a power terminal, the input terminal is coupled to a first inverter One end of two resistors and one end of a first capacitor, the output end is coupled to the other end of the second resistor, and the power supply end receives the light-emitting drive signal and the sleep signal; and A second inverter includes an input terminal, an output terminal, and a power terminal. The input terminal is coupled to the first inverter and the other terminal of the second resistor. The output terminal is coupled to the first capacitor The other end is connected to the control unit, and the power end receives the light-emitting drive signal and the sleep signal. For the light emitting diode module described in claim 1, wherein the driving circuit includes: a latch circuit that receives the light emitting driving signal and the first detection signal; wherein the latch circuit is based on the When the first detection signal knows that the light-emitting drive signal is less than the first threshold for a time greater than or equal to a duration, a latch signal provided by the latch circuit causes the control unit to recognize the light-emitting drive signal Save as the light-emitting command. For the light emitting diode module described in claim 7, wherein the control unit includes: a logic circuit coupled to the detection circuit; and a register coupled to the logic circuit; wherein the latch The circuit is composed of a logic gate and is integrated in the logic circuit; when the light-emitting drive signal is less than the first threshold for a time greater than or equal to the duration, the latch signal provided by the logic gate causes the logic circuit to notify the logic circuit The register stores the identified light-emitting drive signal as the light-emitting command. The light-emitting diode module according to item 7 of the scope of patent application, wherein the latch circuit includes: a second switch including an input terminal, an output terminal and a control terminal, and the output terminal is coupled to the power line And one end of a second capacitor, the input end is coupled to the other end of the second capacitor, one end of a third resistor and the control unit, and the control end receives the first detection signal; and A third switch includes an input terminal, an output terminal and a control terminal, the input terminal is coupled to the other terminal of the second resistor, the output terminal is coupled to a ground point, and the control terminal receives the first detection Signal. The light-emitting diode module according to item 7 of the scope of patent application, wherein the latch circuit includes: a second switch including an input terminal, an output terminal and a control terminal, and the output terminal is coupled to the power line , The input terminal is coupled to one end of a third resistor, and the control terminal receives the first detection signal; and a third switch including an input terminal, an output terminal and a control terminal, the input terminal is coupled to the The other end of the second resistor, one end of a second capacitor and the control unit, the output end is coupled to the other end of the second capacitor and a ground point, and the control end receives the first detection signal. According to the light emitting diode module described in claim 1, wherein the driving circuit includes: a discharge circuit, receiving the second detection signal, and coupled to the power line; wherein, the discharge circuit passes through the first When the second detection signal knows that the light-emitting driving signal is less than the second threshold, the discharge circuit reduces the discharge speed of the light-emitting driving signal. For the light emitting diode module described in item 11 of the scope of patent application, the discharge circuit includes: a discharge switch, including an input terminal, an output terminal and a control terminal, the input terminal is coupled to the power line, the The output terminal is coupled to a ground point, and the control terminal receives the second detection signal. A light-emitting diode string with a sleep mode, comprising: a power line, receiving a DC working voltage; and a control module, coupled to the power line, and including: a power switch, coupled to the power line; and A controller, coupled to the power switch; and at least one light-emitting diode module, the light-emitting diode module is as described in any one of items 1 to 12 of the scope of the patent application, which has the ability to reduce power consumption A light-emitting diode module of electricity; the at least one light-emitting diode module is coupled to the control module through the power cord, and receives the light-emitting driving signal and the DC operation transmitted by the control module through the power cord Voltage; wherein, when the controller controls the power switch to turn on, the DC operating voltage forms a power supply loop for powering the at least one light-emitting diode module through the power line; when the controller wants to generate the at least one light-emitting diode When the light-emitting drive signal of a light-emitting diode module in the polar body module is used, the controller continuously switches the power switch on and off according to the light-emitting command, so that the DC working voltage of the power line forms a complex pulse wave The light-emitting drive signal is combined to form the light-emitting drive signal and transmitted to the light-emitting diode module through the power line.

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