TWI875335B - Light-emitting diode circuit with parallel sequence function, package, light-emitting diode string - Google Patents

Abstract

A light-emitting diode circuit with a parallel sequencing function is connected in parallel to a power line. The light-emitting diode circuit includes a sequencing circuit. In a sequence mode, a first specific voltage is generated by receiving a resistance of a power line and a pulse wave group with a specific frequency is received. The sequencing circuit uses the first specific voltage and the pulse wave group to determine a value, and then sets the value to a serial number of the light-emitting diode circuit.

Description

LED circuit with parallel sequencing function, LED lamp, LED string

The present invention relates to a light-emitting diode circuit, a package, a light-emitting diode light string and a method for operating the light-emitting diode light string, and in particular to a light-emitting diode circuit, a package, a light-emitting diode light string and a method for operating the light-emitting diode light string with a parallel sequencing function.

In the existing technology, in order to drive the LEDs of the LED light string to emit light in a diversified manner, the LEDs have different address sequence data (i.e. serial numbers). The LEDs receive a light signal including light data and address data: if the address sequence data of the LED is the same as the address data of the light signal, the LED emits light according to the light data of the light signal; if the address sequence data of the LED is different from the address data of the light signal, the LED skips the light data of the light signal.

Currently, the sequencing methods of the LEDs in the LED light string are mostly complicated or difficult; for example, before the LEDs are combined into the LED light string, different address sequence data must be burned into each LED. Afterwards, the LEDs are placed and combined into the LED light string in sequence according to the address sequence data. If the LEDs are not placed in sequence according to the address sequence data, the diversified light emission of the LEDs cannot be achieved correctly. In addition, the current sequencing methods of the LEDs in the LED light string usually require traditional manual burning for sequencing, resulting in a lot of time waste. Moreover, when using the traditional manual recording sequencing method, the product cannot be sequenced again after leaving the factory. Therefore, if some LEDs in the LED string are damaged after leaving the factory, they cannot be repaired by themselves.

Therefore, how to design a LED circuit, LED lamp, and LED lamp string with parallel sequencing function to solve the problems of the existing technology is an important topic studied by the inventor of this case.

In order to solve the above problems, the present disclosure provides a light-emitting diode circuit with a parallel sequencing function to overcome the problems of the prior art. Therefore, the present disclosure provides a light-emitting diode circuit with a parallel sequencing function, which is connected in parallel to a power line. The light-emitting diode circuit includes: a sequencing circuit, which receives a first specific voltage generated by the line resistance of the power line and receives a pulse group with a specific frequency in a sequencing mode; wherein the sequencing circuit determines a value using the first specific voltage and the pulse group, and sets the value as a serial number of the light-emitting diode circuit.

In order to solve the above problems, the present disclosure provides a LED lamp, comprising two power pins for receiving an input power supply having a first specific voltage; a plurality of LED lamps coupled to each of the power pins; a LED circuit as described in the present invention, the LED circuit is coupled to each of the power pins with each of the LED lamps, and receives the input power supply through the power pins; and a package body, covering the LED circuit, each of the LED lamps, and a portion of each of the power pins, and allowing each of the power pins to be partially exposed and protruding outside the package body.

In order to solve the above problems, the present disclosure provides a LED lamp string with a parallel sequencing function, comprising a power line, including an input end, a positive power line and a negative power line, the input end receiving an input power, the power line having a line resistance R1; a power setting circuit coupled to the power line, and used to provide a path for the input power to flow back to the input end from the input end, the positive power line and the negative power line, and to adjust a current of the input power to a certain current; a plurality of LED circuits described in the present invention , each of the light-emitting diode circuits is respectively coupled in parallel to the power line and the power setting circuit; wherein, in a certain sequence mode, a plurality of line resistors R1 are included between the input end and the light-emitting diode circuits, and after the certain current flows through the line resistors R1, the sequencing circuit of the light-emitting diode circuits respectively receives a plurality of first specific voltages with different voltage magnitudes according to the parallel sequence position, and then uses the pulse group with the specific frequency to compare the two to set a sequence number of the light-emitting diode circuit. .

The main purpose and effect of the present disclosure is that the LED string is automatically sequenced through the LED circuit sequencing circuit. Mainly, when the sequencing circuit compares the first specific voltage received by the LED circuit with the pulse group, if it is determined that the first specific voltage meets the value represented by the pulse group, the sequencing circuit sets the value of the pulse group as the sequence number of this LED circuit. Therefore, the LED circuit can have the function of automatic sequencing, achieving the effect of saving a lot of burning time.

In order to further understand the technology, means and effects adopted by the present invention to achieve the intended purpose, please refer to the following detailed description and attached figures of the present invention. It is believed that the purpose, features and characteristics of the present invention can be understood in depth and concretely. However, the attached figures are only provided for reference and explanation, and are not used to limit the present invention.

100A: LED string light control system

CL: Controller

CLm: working module

100: LED light string

1: Power cord

(+): Positive pole

(-): Negative

12: Input port

V: voltage source

I: Current source

14: Positive power cord

16: Negative power cord

R1: Line resistance

2: Power setting circuit

2A: Controllable load

2B: Current regulator

Idc: Constant current circuit

L: Closed loop

3: LED circuit

3A: Control module

32: Sequencing circuit

322: Counting circuit

324: Comparison circuits

IN1: First input terminal

IN2: Second input terminal

OUT1: first output terminal

326: Voltage divider circuit

R1: first resistor

R2: Second resistor

328: Digital/Analog Converter

329:Analog/digital converter

332: and circuits

334: Reverse circuit

IN3: The third input terminal

IN4: The fourth input terminal

OUT2: Second output terminal

34: Working circuit

342: LED module

344:Drive circuit

Q:Controlled switch

SW1: First switch

SW2: Second switch

R: Resistance

FG: Frequency Generator

4: Package body

Vdd, Vss: power pins

Pin: Input power

UVLO: Undervoltage Lockout

Vr: Line resistance voltage

V1: first specific voltage

V2: Second specific voltage

V3: The third specific voltage

So1: First output signal

Sd1: first digital signal

Sd2: Second digital signal

Sd3: The third digital signal

FIG. 1A is a system block diagram of a light-emitting diode lamp string control system with a parallel sequencing function disclosed in the present disclosure; FIG. 1B is a circuit block diagram of a first embodiment of a light-emitting diode lamp string with a parallel sequencing function disclosed in the present disclosure; FIG. 1C is a circuit block diagram of a second embodiment of a light-emitting diode lamp string with a parallel sequencing function disclosed in the present disclosure; FIG. 1D is a circuit block diagram of a third embodiment of a light-emitting diode lamp string with a parallel sequencing function disclosed in the present disclosure; FIG. 1E is a circuit block diagram of a fourth embodiment of a light-emitting diode lamp string with a parallel sequencing function disclosed in the present disclosure; FIG. 2A is a circuit block diagram of a first embodiment of a light-emitting diode circuit with a parallel sequencing function disclosed in the present disclosure; FIG. 2B is a circuit block diagram of a second embodiment of a light-emitting diode lamp string with a parallel sequencing function disclosed in the present disclosure; FIG2 is a circuit block diagram of a second embodiment of a light-emitting diode circuit of the present disclosure; FIG2C is a circuit block diagram of a third embodiment of a light-emitting diode circuit with a parallel sequencing function disclosed herein; FIG2D is a circuit block diagram of a second embodiment of a light-emitting diode circuit disclosed herein; FIG3A is a circuit block diagram of a first embodiment of a light-emitting diode lamp string disclosed herein; FIG3B is a circuit block diagram of a second embodiment of a light-emitting diode lamp string disclosed herein; FIG3C is a circuit block diagram of a third embodiment of a light-emitting diode lamp string disclosed herein; FIG3D is a system block diagram of a light-emitting diode lamp string control system of the present disclosure in combination with the third embodiment of a light-emitting diode lamp string; and FIG3E is a schematic diagram of a packaging structure of a light-emitting diode circuit disclosed herein.

The technical content and detailed description of the present disclosure are as follows with accompanying diagrams: Please refer to FIG. 1A for a system block diagram of the LED light string control system with parallel sequencing function disclosed herein. The LED light string control system 100A receives a DC power source Pdc and includes a controller CL and a LED light string 100. The LED light string 100 is coupled to the controller CL via an input terminal 12, and the controller CL converts the DC power source Pdc into an input power source Pin, so as to provide the input power source Pin to the input terminal 12 of the LED light string 100 to power the LED light string 100.

Please refer to FIG. 1B for a circuit block diagram of the first embodiment of the LED lamp string with parallel sequencing function disclosed in the present disclosure, and refer to FIG. 1A in conjunction. The LED lamp string 100 includes a power line 1, a power setting circuit 2, and a plurality of LED circuits 3, and the power line 1 includes an input terminal 12, a positive power line 14, and a negative power line 16. The positive power line 14 is coupled to the positive electrode (+) of the input power Pin through the input terminal 12, and the negative power line 16 is coupled to the negative electrode (-) of the input power Pin through the input terminal 12, and the two ends of the power setting circuit 2 are coupled to the positive power line 14 and the negative power line 16. Among them, the input power Pin can be provided with power by a front-end controller (not shown) based on a control command. Therefore, the input power Pin can be any form of DC source such as DC voltage, pulse power, carrier power or constant current source. The LED circuit 3 is connected in parallel to the power line 1 and the power setting circuit 2. The specific coupling relationship is that one end of each LED circuit 3 is coupled to the positive power line 14, and the other end of each LED circuit 3 is coupled to the negative power line 16. Among them, the power setting circuit 2 is mainly used to adjust the current of the input power Pin to a constant current. When the LED light string 100 is coupled to the input power Pin via the power line 1, each LED circuit 3 in the LED light string 100 can be sequenced so that each LED circuit 3 obtains a sequence number corresponding to its self-arrangement position (for example but not limited to 1, 2, 3, etc.). Then, the controller CL can drive each LED circuit 3 to perform a specific light-emitting behavior according to the sequence number, so that the LED light string 100 can produce visual color changes according to the specific light-emitting behavior of each LED circuit 3.

In general, each LED circuit 3 includes a sequencing circuit 32 and a working circuit 34, and the sequencing circuit 32 receives an input power Pin through a power line 1. Taking a single LED circuit 3 as an example, a line resistor R1 is included between the input terminal 12 and the LED circuit 3, and when a constant current flows through the line resistor R1, a first specific voltage V1 will be generated. When the sequencing circuit 32 receives the first specific voltage V1 and a pulse group with a specific frequency, after determining a value using the first specific voltage V1 and the pulse group, the sequencing circuit 32 can use the value to set the sequence number of the LED circuit 3. The details are described below.

Specifically, the sequencing circuit 32 may include a counting circuit 322 and a comparison circuit 324. The operation mode of the LED circuit 3 may include a sequencing mode and an operating mode; the operating circuit 34 of each LED circuit 3 includes a LED module 342, and may include one or more LEDs, so that the LED can generate at least one light source (for example, but not limited to, red light, blue light, etc.). When in the sequencing mode (for example, but not limited to, the LED string 100 is just connected to the input power Pin), the LED string 100 can disable the operating circuit 34, causing the two ends of the operating circuit 34 to be disconnected (that is, the path from the positive power line 14 through the working circuit 34 to the negative power line 16 is disconnected). After the LED circuit 3 is sequenced, the sequencing circuit 32 can provide the set serial number to the working circuit 34 memory. After completing this operation, the LED string 100 can switch to the working mode.

When in working mode, the input power Pin may be a carrier power including a light-emitting command, and the carrier power may be a pulse group power composed of a high-level voltage and a low-level voltage in a specific sequence. In working mode, the working circuit 34 may obtain the light-emitting command of the carrier power according to the sequence number. Specifically, the carrier power usually includes a light-emitting command for controlling each light-emitting diode circuit 3, and the light-emitting command usually includes an address band (or a sequence band) and a behavior band for setting each light-emitting diode circuit 3 to perform a specific light-emitting behavior. Therefore, the working circuit 34 can access the light-emitting command when the address band (or serial number band) in the light-emitting command matches its own serial number, so that in the working mode, the working circuit 34 can drive the light-emitting diode module 342 to perform specific light-emitting behaviors (such as but not limited to flashing, full brightness, etc.) based on the light-emitting command corresponding to the memory setting serial number in the carrier power supply.

Furthermore, the working circuit 34 may include, for example but not limited to, a driving circuit 344. The driving circuit 344 couples the counting circuit 322 and the LED module 342, and receives an input power Pin (i.e., a carrier power). Thus, in the working mode, the driving circuit 344 can control the LED module 342 to perform a specific light-emitting behavior based on the light-emitting command corresponding to the memory setting sequence number in the carrier power. It is worth mentioning that, in the embodiment, the working circuit 34 further includes the driving circuit 344, which is only an illustrative example, and the driving circuit 344 is not necessarily required to drive the LED module 342. Therefore, any device that can be used to drive the LED module 342 (such as but not limited to control chips and other devices) should be included in the scope of this embodiment. In addition, the input power Pin provided in the sequencing mode is mainly a pulse group power supply or a DC voltage with a certain frequency, which can be used to sequence the LED circuit 3. The input power Pin provided in the working mode is mainly a carrier power supply, which can be used to make the LED circuit 3 control the specific light-emitting behavior of the LED module 342. Therefore, the input power Pin can be the same or different in the sequencing mode and the working mode, but it is not limited to this.

When the LED string 100 is just connected to the input power pin or some LED circuits 3 in the LED string 100 are replaced (mainly when the LED circuit 3 detects that it has no serial number), each LED circuit 3 belonging to the LED string 100 can execute the sequencing mode so that each LED circuit 3 has a correct serial number.

Referring again to FIGS. 1B and 1C , each LED circuit 3 may further optionally include a controlled switch Q. The controlled switch Q couples the sequencing circuit 32, the working circuit 34 and the power line 1, and when the LED circuit 3 is in the working mode, the LED circuit 3 can control the controlled switch Q to conduct the coupling relationship between the working circuit 34 and the power line 1, so that when the LED circuit 3 is in the working mode, the sequencing circuit 32 does not work, thereby saving the power consumption of the LED circuit 3. On the contrary, as shown in FIG. 1B , when the LED circuit 3 is in the sequencing mode, the LED circuit 3 can control the controlled switch Q to conduct the coupling relationship between the sequencing circuit 32 and the power line 1 , so that when the LED circuit 3 is in the sequencing mode, the working circuit 34 does not work, thereby saving the power consumption of the LED circuit 3 .

On the other hand, there are also a plurality of line resistances R1 between the input terminal 12 of the power line 1 and the LED circuit 3. The line resistance R1 may be caused by the line impedance of the power line 1, or may be a specially configured resistor to generate the line resistance R1. Since the bus resistance (i.e., line resistance R1) between each LED circuit 3 arranged in sequence and the input power Pin will be different according to its arrangement position, the bus resistance (i.e., line resistance R1) of the LED circuit 3 with a smaller sequence number will be lower, and vice versa.

Specifically, in the sequencing mode, the input power Pin is a pulse power with a pulse group of a specific frequency, and when the sequencing circuit 32 receives the input power Pin through the power line 1, the counting circuit 322 receives the pulse group with a specific frequency, and counts the number of pulses of the pulse group as a value (the number or its corresponding value, the "value" recorded below is applicable to this definition). One end of the comparison circuit 324 is coupled to the counting circuit 322, and the other end receives the input power Pin. Further, the constant current flows through the line resistor R1, and generates a first specific voltage V1 with different voltage magnitudes in the sequencing circuit 32 of each LED circuit 3.

Therefore, as shown in FIG. 1B , the path from the first LED circuit 3 to the input terminal 12 passes through a set of line resistors R1, and the path from the subsequent LED circuit 3 to the input terminal 12 passes through two sets of line resistors R1, and so on. Therefore, the first specific voltage V1 received by each LED circuit 3 is affected by the different line resistors R1 caused by the order of each LED circuit 3. In this case, the first specific voltage V1 of the LED circuit 3 will be affected by the corresponding line resistor R1, and the corresponding first specific voltage V1 will decrease in sequence according to the order of each LED circuit 3 (for example, 5V, 4.75V, 4.5V, etc.).

Therefore, in the sequencing mode, when the first specific voltage V1 (for example but not limited to, 4.75V) of one of the LED circuits 3 of the LED string 100 (for example but not limited to, the second LED circuit 3 from the input terminal 12 in the sequencing, hereinafter referred to as the second LED circuit 3) satisfies the value of the pulse group (i.e., the count of two pulses), the comparison circuit 324 of the second LED circuit 3 controls the sequencing circuit 32 to stop counting. Then, when the sequencing circuit 32 of the second LED circuit 3 stops counting, the accumulated value of the counting circuit 322 is set as the sequence number of the second LED circuit 3 (i.e., the sequence number is 2). Then, in the working mode, the working circuit 34 of the second LED circuit 3 drives the LED module 342 containing the light-emitting command with the sequence number 2 to perform the specific light-emitting behavior as described above according to the sequence number 2. The operation mode of the remaining LED circuits 3 is the same as the above description, and will not be repeated here.

Referring back to FIG. 1B , the power setting circuit 2 is designed to turn on the power setting circuit 2 in the sequencing mode and turn off (disconnect) the power setting circuit 2 in the working mode. Therefore, in the sequencing mode, the two ends of the working circuit 34 are disconnected (i.e., the path from the positive power line 14 through the working circuit 34 to the negative power line 16 is disconnected), and the conduction of the power setting circuit 2 can generate a closed loop L from the positive electrode (+) of the input power pin, the power line 1, the power setting circuit 2 to the negative electrode (-) of the input power pin. Therefore, the input power Pin can flow from the positive electrode (+), the positive power line 14 to the negative power line 16, the negative electrode (-) through the power setting circuit 2, and the closed loop L will not be broken due to the two ends of the working circuit 34 being broken, resulting in the current being unable to flow. Then, in the working mode, the working circuit 34 of each LED circuit 3 operates to form a path from the positive power line 14, the working circuit 34 to the negative power line 16, and there is no need to use the closed loop L through the power setting circuit 2. Therefore, in the working mode, the power setting circuit 2 is turned off, so that when the LED circuit 3 is in the working mode, the power setting circuit 2 does not work, thereby saving the power consumption of the LED lamp string 100.

Please refer to FIG. 1C for a circuit block diagram of a second embodiment of the LED string 100 with a parallel sequencing function disclosed herein, and refer to FIG. 1B in conjunction. The difference between the LED string 100 of the embodiment of FIG. 1C and the LED string 100 of FIG. 1B is that the controlled switch Q is coupled between the sequencing circuit 32 and the power line 1, and when the LED circuit 3 is in the working mode, the LED circuit 3 can control the controlled switch Q to turn off and disable the sequencing circuit 32, so that when the LED circuit 3 is in the working mode, the sequencing circuit 32 does not work and saves the power consumption of the LED circuit 3. On the contrary, when the LED circuit 3 is in the sequencing mode, the LED circuit 3 can control the controlled switch Q to conduct, so that the sequencing circuit 32 is coupled to the power line 1. It is worth mentioning that in one embodiment, the detailed features of the difference between the controlled switches Q in FIG. 1B and FIG. 1C and the effects that can be achieved will be further described later and will not be elaborated here.

Please refer to FIG. 1D for a circuit block diagram of the third embodiment of the LED light string with parallel sequencing function disclosed herein, and refer to FIG. 1A to FIG. 1C in conjunction. In FIG. 1D, the sequencing circuit 32 and the working circuit 34 can be referred to as the control module 3A for convenience of a detailed description of the features of FIG. 1D. Each LED circuit 3 further includes a resistor R and a first switch SW1, and the resistor R is connected in series to the positive power line 14. The first switch SW1 is connected in parallel to the resistor R and coupled to the control module 3A, so that the control module 3A can control the on/off of the first switch SW1. Among them, the first switch SW1 can be coupled to the sequencing circuit 32 or the working circuit 34 to control the on/off of the first switch SW1 through the sequencing circuit 32 or the working circuit 34.

Furthermore, when the line impedance of the power line 1 (i.e., line resistance R1) is relatively small, sometimes the first specific voltage V1 does not have an obvious voltage difference, which makes the sequencing circuit 32 difficult to identify. Therefore, the resistance value can be increased by adding a resistor R in the LED circuit 3 and connecting it in series with the positive power line 14, so that when the current flows through, the first specific voltage V1 is obtained, and the voltage difference of the first specific voltage V1 is larger than that under the single line group R1, so that the sequencing circuit 32 can more easily confirm its own serial number according to the first specific voltage V1. Therefore, in the sequencing mode, the control module 3A controls the first switch SW1 to be turned off, and the resistance value of the line impedance is increased to the line resistance R1 plus the resistance R. On the contrary, after the sequencing is completed, the resistor R is no longer needed to increase the resistance value. Instead, the resistor R must be bypassed to reduce the power consumption of the power line 1. Therefore, the resistor R can be bypassed by turning on the first switch SW1 connected in parallel to the resistor R.

Please refer to FIG. 1E for a circuit block diagram of the fourth embodiment of the LED light string with parallel sequencing function disclosed herein, and refer to FIG. 1A to FIG. 1D in conjunction. The difference between the LED light string 100 of the embodiment of FIG. 1E and the LED light string 100 of FIG. 1C is that the resistor R is connected in series to the negative power line 16. It is worth mentioning that in one embodiment, the circuit coupling relationship and operation principle of FIG. 1E are the same as those of FIG. 1D, and the details thereof will not be described in detail here.

Please refer to FIG. 2A for a circuit block diagram of the first embodiment of the light-emitting diode circuit with parallel sequencing function disclosed herein, and refer to FIG. 1A to FIG. 1E in conjunction. In FIG. 2A, the input power source Pin is a pulse power source having a pulse group with a specific frequency. The constant current provided by the pulse power source flows through the line resistor R1 to generate a first specific voltage V1 having a specific frequency, and the waveform of the first specific voltage V1 can be a pulse group composed of multiple pulses as shown in FIG. 2A. The comparison circuit 324 is an analog comparator, and the sequencing circuit 32 further includes a voltage divider circuit 326 and a digital/analog converter 328. The voltage divider circuit 326 is coupled to the power line 1 and the first input terminal IN1 of the comparison circuit 324, and the voltage divider circuit 326 divides the received first specific voltage V1 into a second specific voltage V2 to provide the second specific voltage V2 to the first input terminal IN1. For example, the voltage divider circuit 326 may include a first resistor R1 and a second resistor R2 connected in series. One end of the first resistor R1 is coupled to the positive power line 14, and the other end of the first resistor R1 is coupled to the first input terminal IN1. The first specific voltage V1 generates a second specific voltage V2 between the first resistor R1 and the second resistor R2 to provide the second specific voltage V2 to the first input terminal IN1. The digital/analog converter 328 is coupled to the counting circuit 322 and the second input terminal IN2 of the comparison circuit 324, and the digital/analog converter 328 converts the value of the pulse group counted by the counting circuit 322 into a third specific voltage V3.

The comparison circuit 324 compares the second specific voltage V2 with the third specific voltage V3. When the third specific voltage V3 and the second specific voltage V2 cause the first output signal So1 outputted from the first output terminal OUT1 of the comparison circuit 324 to transition, it means that the first specific voltage V1 satisfies the value of the pulse group accordingly. Specifically, since each LED circuit 3 is affected by its own sequence position, when a constant current flows through the corresponding line resistor R1, the received first specific voltage V1 will decrease in sequence (e.g., 5V, 4.75V, 4.5V, etc.). Therefore, the second specific voltage V2 will also decrease in sequence according to the sequence of the LED circuits 3. On the other hand, the accumulated value of the counting circuit 322 is converted into a third specific voltage V3 by the digital/analog converter 328. There is a linear relationship between the accumulated value of the counting circuit 322 and the third specific voltage V3 (such as but not limited to analog voltages such as 2.5V, 2.25V, and 2V), and the linear relationship may have a specific negative slope (such as but not limited to a slope of -1). In addition, there is also a linear relationship between the sequence position of each LED circuit 3 in the LED string 100 and the second specific voltage V2 (for example but not limited to 2.75V, 2.5V, 2.25V, etc.) generated by the voltage divider circuit 326, and the voltage slope formed is basically the same as the specific slope (that is, the voltage slope is also -1).

On the other hand, the sequencing circuit 32 further includes an AND circuit 332, and the AND circuit 332 includes a third input terminal IN3, a fourth input terminal IN4 and a second output terminal OUT2. The third input terminal IN3 receives the first specific voltage V1, the fourth input terminal IN4 is coupled to the first output terminal OUT1 of the comparison circuit 324, and the second output terminal OUT2 is coupled to the counting circuit 322. The first specific voltage V1 can be provided to the voltage divider circuit 326 and the third input terminal IN3 at the same time. When the second specific voltage V2 and the third specific voltage V3 of a certain LED circuit 3 do not cause the first output signal So1 provided by the first output terminal OUT1 to transition, it means that the accumulated value of the counting circuit 322 does not conform to the sequence of this LED circuit 3, and this LED circuit 3 has not yet obtained the correct serial number. Therefore, the first output signal So1 and the first specific voltage V1 are at the same voltage level (for example, but not limited to a high level, but the voltage values may be different). Therefore, the AND circuit 332 generates a logic signal such as, but not limited to, a high level based on the first output signal So1 and the first specific voltage V1 being at the same voltage level and transmits it to the counting circuit 322 through the second output terminal OUT2, so that the counting circuit 322 continues to count based on the high-level logic signal.

On the contrary, when the second specific voltage V2 and the third specific voltage V3 of the LED circuit 3 cause the first output signal So1 provided by the first output terminal OUT1 to change state, it means that the value accumulated by the counting circuit 322 conforms to the sequence of the LED circuit 3, and the LED circuit 3 obtains the correct sequence number. Therefore, the first output signal So1 output by the comparison circuit 324 changes state, causing the first output signal So1 and the first specific voltage V1 to be different voltage levels. Therefore, the AND circuit 332 generates a logic signal such as but not limited to a low level based on the different voltage levels of the first output signal So1 and the first specific voltage V1, and transmits it to the counting circuit 322 through the second output terminal OUT2, so that the counting circuit 322 stops counting based on the low level logic signal. In addition, in one embodiment, the AND circuit 332 can be an AND gate (as shown in FIG. 2A), or a circuit composed of electronic components with the same logic as the AND gate (not shown).

The output end of the counting circuit 322 can be coupled to the working circuit 34, so that when the counting circuit 322 stops counting based on the low-level logic signal, the sequencing circuit 32 can use the value of the pulse accumulated when counting stops (for example, 3 pulses) as the serial number of the LED circuit 3, so as to provide the serial number of the LED circuit 3 (i.e., the value of the pulse) to the memory of the working circuit 34, and the working circuit 34 can perform a specific light-emitting behavior on its own LED module 342 based on the serial number of the LED circuit 3. It is worth mentioning that in one embodiment, the transition state of the comparison circuit 324 can also be changed from a high level to a low level, and the AND circuit 332 can be a NAND gate. Therefore, in one embodiment, the internal structure of the sequencing circuit 32 can be adjusted accordingly based on the spirit of this disclosure and the common knowledge of those skilled in the art.

Please refer to FIG. 2B for a circuit block diagram of the second embodiment of the LED circuit with parallel sequencing function disclosed in the present disclosure, and refer to FIG. 1A to FIG. 2A in conjunction. In FIG. 2B , the comparison circuit 324 is a digital comparator, and the sequencing circuit 32 further includes a voltage divider circuit 326 and an analog/digital converter 329. The structure and operation of the voltage divider circuit 326 are the same as those of FIG. 2A , and will not be described in detail here. The analog/digital converter 329 couples the voltage divider circuit 326 and the first input terminal IN1 of the comparison circuit 324, and the analog/digital converter 329 performs analog/digital conversion on the second specific voltage V2 into the first digital signal Sd1. The comparison circuit 324 compares the first digital signal Sd1 with the second digital signal Sd2 corresponding to the value of the accumulated pulse, and when the second digital signal Sd2 and the first digital signal Sd1 cause the first output signal So1 outputted from the first output terminal OUT1 of the comparison circuit 324 to transition, it means that the first specific voltage V1 satisfies the value of the pulse group accordingly.

When the first digital signal Sd1 (for example, but not limited to, logic 111) and the second digital signal Sd2 (for example, but not limited to, logic 110) of a certain LED circuit 3 do not cause the first output signal So1 provided by the first output terminal OUT1 to transition, it means that the value of the pulse accumulated by the counting circuit 322 does not conform to the sequence of the LED circuit 3, and the LED circuit 3 has not obtained the correct sequence number. Therefore, the first output signal So1 and the first specific voltage V1 are the same voltage level (for example, but not limited to a high level, but the voltage values may be different). On the contrary, when the first digital signal Sd1 (such as but not limited to logic 101) and the second digital signal Sd2 (such as but not limited to logic 110) of the LED circuit 3 cause the first output signal So1 provided by the first output terminal OUT1 to change state, it means that the value of the pulse accumulated by the counting circuit 322 conforms to the sequence of the LED circuit 3, and the LED circuit 3 obtains the correct sequence number. Therefore, the first output signal So1 output by the comparison circuit 324 changes state, causing the first output signal So1 and the first specific voltage V1 to be different voltage levels. Among them, the coupling relationship and operation method of the circuit 332 are the same as those in FIG. 2A, and will not be described in detail here. Similarly, the output terminal of the counting circuit 322 can be coupled to the working circuit 34. The reason is the same as that in FIG. 2A and will not be elaborated here.

Please refer to FIG. 2C , the sequencing circuit 32 further includes an inverting circuit 334, the inverting circuit 334 is coupled to the counting circuit 322 and the second input terminal IN2 of the comparison circuit 324, and the inverting circuit 334 is used to invert the second digital signal Sd2 into a third digital signal Sd3. When the third digital signal Sd3 and the first digital signal Sd1 cause the first output signal So1 to transition, it represents that the first specific voltage V1 satisfies the value of the accumulated pulse accordingly. Specifically, the counting circuit 322 usually has a forward output terminal and a reverse output terminal. When the counting circuit 322 just starts counting (e.g., the first pulse), the forward output terminal of the counting circuit 322 usually outputs a digital signal with a lower logic (e.g., but not limited to, logic 001). On the contrary, the negative output terminal of the counting circuit 322 will output the reversed first digital signal Sd1 (for example but not limited to, logic 110). Therefore, the counting circuit 322 usually uses the reverse output terminal to couple the second input terminal IN2 of the comparison circuit 324 so that the first digital signal Sd1 corresponds to the logic of the second specific voltage V2. However, if the counting circuit 322 does not have a reverse output terminal, an additional reverse circuit 334 can be coupled between the counting circuit 322 and the second input terminal IN2 of the comparison circuit 324 to reverse the digital signal with a lower logic to the first digital signal Sd1.

Optionally, the input power Pin (i.e., pulse power) can be an adjustable power supply with adjustable pulse amplitude. When the input power Pin is an adjustable power supply, the LED lamp string 100 can change the current flowing through the line resistor R1 by adjusting the amplitude of the pulse. Therefore, the line resistance voltage Vr generated on the line resistor R1 can be adjusted accordingly. Since the line resistance voltage Vr is changed, the first specific voltage V1 obtained by each LED circuit 3 will also change. When the voltage difference of the first specific voltage V1 of each LED circuit 3 is larger due to the increase of the line resistance voltage Vr, the sequencing circuit 32 can more easily determine the accurate serial number. On the contrary, when the line resistance voltage Vr becomes smaller, the power loss of the LED string 100 is less, and the power consumption of the LED string 100 can be saved.

Furthermore, since the wires or lamp spacing or lamp number used in each type of LED lamp string 100 may be different (and the impedance of each line resistor R1 is not the same), the power setting circuit 2 is preferably an adjustable control circuit with adjustable impedance to receive a control command to set the power parameters (such as but not limited to the value of the resistor or current source) inside the power setting circuit 2. When the power setting circuit 2 is an adjustable control circuit, the current flowing through the line resistor R1 is adjusted by adjusting the internal power parameters of the power setting circuit 2, and the voltage of the line resistor voltage Vr can also be changed. Therefore, even if the impedance of each line resistor R1 is not exactly the same (i.e., roughly equal to, but still slightly different), by adjusting the current flowing through the line resistor R1, the effect caused by the different impedances of the line resistor R1 can be reduced.

Please refer to FIG. 2D for a circuit block diagram of the second embodiment of the LED circuit with parallel sequencing function disclosed in the present disclosure, and refer to FIG. 1A to FIG. 2A in conjunction. In FIG. 2C, the input power source Pin is a DC voltage with a voltage value that is substantially constant, and the LED circuit 3 may further include a frequency generator FG. The frequency generator FG is coupled to the counting circuit 322 and receives a first specific voltage V1. The DC voltage passes through the line resistor R1 to generate a first specific DC voltage V1 in the sequencing circuit 32, and the frequency generator FG generates a pulse group with a specific frequency and a complex pulse based on the first specific DC voltage V1 to provide the pulse group to the counting circuit 322. In addition to the aforementioned first specific DC voltage V1, the frequency generator FG can also be coupled to the oscillator (not shown) in the LED circuit 3, and after receiving the oscillation frequency provided by the oscillator, divide it to generate the pulse set.

If the sequencing circuit 32 includes the circuit 332, the pulse group can be provided to the third input terminal IN3. It is worth mentioning that in one embodiment, the frequency generator FG is usually configured in the working circuit 34, preferably in the driving circuit 344, mainly used to generate a working clock signal through oscillation. The present disclosure uses the oscillation feature of the frequency generator FG in the sequencing mode to oscillate the first specific DC voltage V1 into a pulse group.

It is worth mentioning that in one embodiment, the implementation method of Figures 2A-2B is more suitable for the circuit architecture of the embodiment of Figure 1B. The main reason is that in the sequencing mode, the working circuit 34 does not need to operate at all, and it is not necessary to supply power to increase power consumption. On the contrary, the implementation method of Figure 2C is more suitable for the circuit architecture of the embodiment of Figure 1C. The main reason is that in the sequencing mode, the working circuit 34 needs to be powered to activate the frequency generator FG inside the working circuit 34. However, it does not mean that the implementation method of Figures 2A-2B is completely inapplicable to the circuit architecture of Figure 1C (the same is true for Figure 2C).

Please refer to FIG. 3A for a circuit block diagram of the first embodiment of the light-emitting diode lamp string disclosed herein, and FIG. 3B for a circuit block diagram of the second embodiment of the light-emitting diode lamp string disclosed herein, and refer to FIG. 1A to FIG. 2D in conjunction. In FIG. 3A, the input power source Pin is a voltage source V (which can be a DC voltage in the form of a pulse wave or a DC voltage with a constant value), and the power setting circuit 2 can be a constant current circuit plus a controllable load, so that the input power source Pin can flow from the positive electrode (+) through the power setting circuit 2 to the negative electrode (-), and achieve constant current control. In FIG. 3B , the input power Pin can be a current source I (can be a current source in the form of a pulse or a constant current source with a constant value), and the power setting circuit 2 can be a constant voltage circuit plus a controllable load, so that the input power Pin can flow from the positive electrode (+) through the power setting circuit 2 to the negative electrode (-), and achieve constant voltage control.

Please refer to FIG. 3C for a circuit block diagram of the third embodiment of the LED light string disclosed herein, and FIG. 3D for a system block diagram of the LED light string control system in combination with the third embodiment of the LED light string disclosed herein, and refer to FIG. 1A to FIG. 2C in conjunction. FIG. 3C differs from the aforementioned FIG. 2A to FIG. 3B in that the constant current circuit of the power setting circuit 2 is separated from the controllable load 2A and becomes part of the controller CL. The controllable load 2A can be composed of a resistor and a switch in a simpler implementation. Mainly, after the LED light string control system 100A determines the line resistance R1, the controller CL can provide a command to the controllable load 2A to turn it on in the sequence mode and turn it off in the normal mode.

Referring to FIG. 3D , the constant current circuit Idc and the switch SW2 can form a current regulator 2B. When in the sequencing mode, the switch SW2 conducts the constant current circuit Idc and couples the negative electrode (-), so that the input power Pin can flow from the positive electrode (+) through the controllable load 2A and the negative electrode (-) to the path of the constant current circuit Idc, and achieve constant current control. On the contrary, when in working mode, switch SW2 turns on the working module CLm to couple the negative pole (-), and the working module CLm starts to generate a lighting command with a serial number and transmits it to the LED string 100 through the power line 1 through the input terminal 12 in the form of a carrier power supply. At this time, each LED circuit 3 controls the LED module 342 to perform a specific lighting behavior based on the lighting command corresponding to the memory serial number. It is worth mentioning that in one embodiment, when the input power source is a constant current source, the current regulator 2B can be replaced by a voltage regulator, and the voltage regulator includes a constant voltage circuit and a switch SW2, and its action is similar to the description of Figures 3C~3D, which will not be repeated here.

Therefore, in summary, the power setting circuit 2 is mainly used to enable the LED string 100 to generate a certain current in the sequencing mode. When the resistance value of the line resistance R1 or the line impedance (i.e., the line resistance R1 plus the resistance R) is fixed, a first specific voltage V1 sufficient to be recognized by the sequencing circuit 32 of each LED circuit 3 can be generated. Its implementation can be divided into two implementations: the constant power regulator 2 of FIG. 1B and the current regulator 2B plus the controllable load 2A of FIG. 3C. Among them, FIG. 3C requires the current regulator 2B plus the controllable load 2A to organize a complete constant power regulator 2.

Please refer to FIG. 3E for a schematic diagram of the structure of the LED lamp disclosed in the present invention, and refer to FIG. 1A to FIG. 3D in conjunction. In FIG. 3E , the LED circuit 3 is packaged in the entire package 4. The sequencing circuit 32 and the working circuit 34 can be integrated into a single control chip to form a control module 3A to perform the above-mentioned sequencing mode and working mode operations. The LED module 342 includes a plurality of LEDs, and the two power pins Vdd and Vss of the package 4 can be coupled to the positive power line 14 and the negative power line 16 of the power line 1, respectively. Therefore, referring to FIG. 1B , each LED circuit 3 in the LED lamp string 100 can be packaged in the entire package body 4 to form a complete LED lamp, and the sequencing circuit 32 and the working circuit 34 can receive the input power Pin through the power pins Vdd and Vss.

Referring again to FIGS. 1A to 3E , each LED circuit 3 may include a memory unit (for example, but not limited to, a memory), and the memory unit may be a volatile memory unit or a non-volatile memory unit. When the power value of the input power Pin is too low (for example, but not limited to, as low as undervoltage lockout (UVLO)), the data in the volatile memory unit will be cleared. Therefore, the power value of the input power Pin cannot be lower than the undervoltage lockout UVLO (as shown in FIG. 2A ), and each time the input power Pin is connected, the LED string 100 must be re-sequenced. On the contrary, if the memory unit is a non-volatile memory unit, even if the input power Pin is low (as shown in FIG. 2B , the input power Pin can be 0), the data in the memory unit will not be cleared. Therefore, unless a certain LED circuit 3 in the LED string 100 does not have a correct serial number (for example, but not limited to, being replaced), the LED string 100 does not need to be re-sequenced. In addition, in one embodiment, the counting circuit 322 of the LED circuit 3 can preferably perform the value calculation after the pulse is stable at the rising edge. In this way, it is possible to avoid the impact of noise or overshoot on the counting of the counting circuit 322 when the pulse changes from a low level to a high level (i.e., the rising edge). It is worth mentioning that in one embodiment, the circuit features and operation methods of Figures 1A to 3E can be applied interchangeably and are not limited to the embodiment of a single figure.

However, the above is only a detailed description and diagram of the preferred specific embodiment of the present invention, but the features of the present invention are not limited thereto, and are not used to limit the present invention. The entire scope of the present invention shall be subject to the following patent application scope. All embodiments that conform to the spirit of the patent application scope of the present invention and its similar variations shall be included in the scope of the present invention. Any changes or modifications that can be easily thought of by anyone familiar with the art within the field of the present invention can be covered by the following patent scope of this case.

CL: Controller

100: LED light string

1: Power cord

(+): Positive pole

(-): Negative

12: Input port

14: Positive power cord

16: Negative power cord

R1: Line resistance

2: Power setting circuit

L: Closed loop

3: LED circuit

32: Sequencing circuit

322: Counting circuit

324: Comparison circuits

34: Working circuit

342: LED module

Q:Controlled switch

Pin: Input power

Vr: Line resistance voltage

V1: first specific voltage

Claims (16)

A light-emitting diode circuit with a parallel sequencing function is connected in parallel to a power line. The light-emitting diode circuit includes: a sequencing circuit, which receives a first specific voltage generated by a line resistance of the power line and a pulse group with a specific frequency in a sequencing mode; and a working circuit, which is disabled in the sequencing mode; wherein the sequencing circuit determines a value using the first specific voltage and the pulse group, and sets the value as a serial number of the light-emitting diode circuit, and after the sequencing is completed, the sequencing circuit provides the serial number to the working circuit. The light-emitting diode circuit as described in claim 1, wherein the sequencing circuit includes: a counting circuit, receiving the pulse group with the specific frequency, counting the accumulated pulses of the pulse group as the numerical value; and a comparison circuit, coupled to the counting circuit; wherein, when the first specific voltage satisfies the numerical value accordingly, the comparison circuit controls the counting circuit to stop counting, and the sequencing circuit sets the numerical value when counting stops as the serial number. The light-emitting diode circuit as described in claim 2, wherein the sequencing circuit further comprises: a voltage divider circuit, coupling the power line and a first input terminal of the comparison circuit, and the voltage divider circuit divides the first specific voltage into a second specific voltage to provide the second specific voltage to the first input terminal; and a digital/analog converter, coupling the counting circuit and a second input terminal of the comparison circuit. The digital/analog converter performs a digital/analog conversion on the value into a third specific voltage; wherein the comparison circuit compares the second specific voltage with the third specific voltage, and when the third specific voltage and the second specific voltage cause a first output signal outputted from a first output terminal of the comparison circuit to change state, it represents that the first specific voltage satisfies the value accordingly. The LED circuit as described in claim 3, wherein there is a linear relationship between the numerical value and the third specific voltage, and the digital/analog converter performs the digital/analog conversion according to the linear relationship. The LED circuit as described in claim 2, wherein the sequencing circuit further comprises: a voltage divider circuit coupled to the power line and dividing the first specific voltage into a second specific voltage; and an analog/digital converter coupled to the voltage divider circuit and a first input terminal of the comparison circuit, and the analog/digital converter performs an analog/digital conversion on the second specific voltage into a first digital signal; wherein the comparison circuit compares the first digital signal with the counting circuit to transmit a second digital signal corresponding to the numerical value, and when the second digital signal and the first digital signal cause a first output signal outputted from a first output terminal of the comparison circuit to transition, it represents that the first specific voltage satisfies the numerical value accordingly. The light-emitting diode circuit as described in claim 5, wherein the sequencing circuit further comprises: an AND circuit, comprising a third input terminal, a fourth input terminal and a second output terminal, the third input terminal receiving the pulse group, the fourth input terminal coupled to a first output terminal of the comparison circuit, and the second output terminal coupled to the counting circuit; wherein the AND circuit sends a logic signal through the second output terminal based on the first output signal and the voltage of the pulse group to control the counting circuit to continue counting or stop counting. The LED circuit as described in claim 6 further includes: A frequency generator coupled to the counting circuit and receiving the first specific voltage, the frequency generator generating the pulse group having a plurality of pulses based on the first specific voltage. The LED circuit as described in claim 5, wherein the sequencing circuit further comprises: an inversion circuit, coupling the counting circuit and a second input terminal of the comparison circuit, and the inversion circuit is used to invert a second digital signal corresponding to the numerical value transmitted by the counting circuit into a third digital signal to the second input terminal, when the third digital signal and the first digital signal cause the first output signal to transition, it represents that the first specific voltage satisfies the numerical value accordingly. A light-emitting diode circuit as described in claim 2, wherein the operation mode of the light-emitting diode circuit includes the sequencing mode and a working mode; in the working mode, the working circuit selects to execute a light-emitting command of a received carrier power source based on the set sequence number. The light-emitting diode circuit as described in claim 9, wherein the working circuit further comprises: a driving circuit coupled to the counting circuit and receiving the light-emitting command of the carrier power source; wherein, in the working mode, the driving circuit executes the light-emitting command. The light-emitting diode circuit as described in claim 10 further includes: a controlled switch coupling the sequencing circuit and the working circuit; wherein, in the sequencing mode, the controlled switch turns on the sequencing circuit, and in the working mode, the controlled switch turns on the working circuit. The light-emitting diode circuit as described in claim 11, wherein the driving circuit further includes: a frequency generator, the working circuit is coupled to an input power source, and the input power source is a DC voltage; in the sequencing mode, the sequencing circuit is coupled to the power line by turning on the controlled switch, and the frequency generator generates the pulse set based on the DC voltage to provide the pulse set to the sequencing circuit; in the working mode, the controlled switch is turned off to disable the sequencing circuit. The LED circuit as described in claim 1 further includes: A resistor connected in series to the power line; wherein, in the sequencing mode, the line impedance of the power line is increased to the sum of the line resistance and the resistor to obtain the first specific voltage. The LED circuit of claim 13 further includes: a first switch connected in parallel with the resistor; wherein, in the sequencing mode, the first switch is turned off, so that the line impedance of the power line is increased to the sum of the line resistance and the resistor and the first specific voltage is adjusted, and in the working mode, the first switch is turned on to bypass the resistor. A light-emitting diode lamp comprises: two power pins for receiving an input power supply having a first specific voltage; a plurality of light-emitting diode lamps coupled to each of the power pins; a light-emitting diode circuit as described in any one of claims 1 to 14, the light-emitting diode circuit coupled to each of the power pins with each of the light-emitting diode lamps, and receiving the input power supply through the power pins; and a package body covering the light-emitting diode circuit, each of the light-emitting diode lamps, and a portion of each of the power pins, and allowing each of the power pins to be partially exposed and protruding outside the package body. A light-emitting diode lamp string with a parallel sequencing function, comprising: a power line, including an input end, a positive power line and a negative power line, the input end receiving an input power, the power line having a line resistance; a power setting circuit, coupled to the power line, and used to provide a path for the input power to flow back to the input end from the input end, the positive power line and the negative power line, and to adjust a current of the input power to a certain current; and a plurality of light-emitting diode circuits as any one of claims 1 to 14, each The light-emitting diode circuit is coupled in parallel to the power line and the power setting circuit respectively; Wherein, in a certain sequence mode, a plurality of line resistors are included between the input end and the light-emitting diode circuits, and after the certain current flows through the line resistors, the sequencing circuit of the light-emitting diode circuits receives a plurality of first specific voltages with different voltage magnitudes according to the parallel sequence position, and then receives the pulse group with the specific frequency and compares the two to set a sequence number of the light-emitting diode circuit.

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