CN117015102A - LED (light emitting diode) light string control system, LED module and control method thereof - Google Patents

Abstract

The LED lamp string control system comprises an LED lamp string and a control module, wherein the control module provides a first potential based on a first digital logic of a lighting command and provides a second potential based on a second digital logic of the lighting command so as to form a control signal. The control module adjusts the control signal to the first potential or the second potential and is used as a partition potential for partitioning two continuous first potentials and/or two continuous second potentials based on the light-emitting command as continuous first logic and/or continuous second logic. The time width of the separation potential is different from the time width of the first potential and the second potential. Therefore, the LED lamp string control system with the signal identification function, the LED module and the control method thereof are provided, and the situation that logic cannot be identified due to logic distortion is avoided.

Description

LED (light emitting diode) light string control system, LED module and control method thereof

Technical Field

The present invention relates to a light emitting diode (led) string control system, a led module and a control method thereof, and more particularly to a led string control system with signal recognition function, a led module and a control method thereof.

Background

Light emitting diodes are increasingly used for lighting or display applications, as they are now becoming more popular, and as their manufacturing costs are also becoming lower. In contrast, there are more and more ways to operate and control the light emitting behavior of leds. In the application of the light-emitting diode light string, because the conventional technology uses the time width to judge that the logic signal is 0 or 1, the defect is that the parasitic capacitive reactance in the light-emitting diode light string is influenced by the number of lamps, the length of the lamp distance and the thickness of the line diameter of the light string. If the parasitic capacitance is too large, it will cause distortion of the square waveforms of "0" and "1".

Assume that square waveforms of "0" and "1" should last for 1 μs under ideal conditions, and that the led string needs to last for at least 0.8 μs to recognize the signal as "0" or "1". However, the square waveform with logic "0" is distorted to only 0.5 μs by too much influence of parasitic capacitance. Therefore, if the square waveform is distorted, determining the logic signal with the time width is likely to result in a situation that the time width is insufficient and misjudgment is performed, and thus the whole group of light emitting diode strings cannot be controlled.

Disclosure of Invention

The invention aims to provide a Light Emitting Diode (LED) lamp string control system with a signal identification function, an LED module and a control method thereof, which avoid the situation that logic cannot be identified due to logic distortion.

In order to achieve the above objective, the present invention provides a light emitting diode light string control system with signal recognition function, and the light emitting diode light string control system includes a light emitting diode light string and a control module. The LED light string comprises a plurality of LED modules, and the control module is coupled with each LED module to provide a control signal based on the luminous command to control each LED module to generate luminous behavior. The control module provides corresponding first potentials and second potentials based on the first digital logic and the second digital logic of the light emitting command respectively to form control signals. When the light emitting command includes a first digital logic and a second digital logic which are staggered, the control module directly adjusts the potential of the control signal from the first potential to the second potential or directly adjusts the potential from the second potential to the first potential based on the staggered sequence. When the light-emitting command comprises continuous first logic, the control module adjusts the potential of the control signal from the first potential to the second potential and uses the control signal as a separation potential for separating two continuous first potentials; when the light emitting command includes continuous second logic, the control module adjusts the potential of the control signal from the second potential to the first potential and uses the second potential as a partition potential for partitioning two continuous second potentials. The partition potential has a first time width, the first potential has a second time width, and the second potential has a third time width; the first time width is different from the second time width and the third time width.

Optionally, the control module includes: the voltage generating device is coupled with the LED lamp string; and a controller coupled to the voltage generating device for controlling the voltage generating device to adjust a direct current voltage received by the LED lamp string to the control signal based on the lighting command.

Optionally, the voltage generating device includes: the first voltage generating circuit is coupled with the LED lamp string and the controller; the second voltage generating circuit is coupled with the LED lamp string and the controller; the controller generates a first voltage by controlling the first voltage generating circuit so as to adjust the control signal to the first potential; the controller generates a second voltage by controlling the second voltage generating circuit to adjust the control signal to the second potential.

Optionally, the first voltage generating circuit includes: the first switch is coupled with the LED lamp string and the controller; the controller uses a ground voltage as the first voltage by controlling the first switch to be conducted, so that a direct current voltage received by the LED lamp string is used as the first potential.

Optionally, the second voltage generating circuit is connected in parallel to the first voltage generating circuit, and includes: the first voltage stabilizing element is coupled with the LED lamp string; and a second switch coupled to the voltage stabilizing unit and the controller; the first voltage stabilizing element controls the second switch to be conducted based on the controller to generate the second voltage so as to adjust the control signal to the second potential of the direct current voltage minus the second voltage.

Optionally, the second voltage generating circuit includes: the first voltage generating module is coupled with a node between the LED lamp string and the first switch; the first unidirectional conduction element is coupled with the node and the first voltage generation module and is used for unidirectional conduction of a path from the node to the first voltage generation module; the controller controls the first voltage generating module to generate the second voltage based on the second logic so as to adjust the control signal to the second potential of the direct current voltage minus the second voltage.

Optionally, the first time width is smaller than the second time width, and/or the first time width is smaller than the third time width.

In order to achieve the above objective, the present invention further provides a light emitting diode module with a signal recognition function, and the light emitting diode module is configured to receive a control signal including a plurality of first potentials and a plurality of second potentials. The light emitting diode module comprises an LED controller and at least one Light Emitting Diode (LED), and the LED is coupled with the LED controller. The LED controller receives input voltage required by operation through the positive electrode terminal and the negative electrode terminal, and receives a control signal through the signal receiving terminal. The control signal is composed according to a specific sequence, and has a first potential and a second potential with direct change of potential, and has the first potential and/or the second potential as a partition potential, and is used for partitioning two continuous first potentials and/or partitioning two continuous second potentials; the LED controller is used for dividing two continuous first potentials and two continuous second potentials based on the dividing potential so as to correspondingly generate driving commands based on the first potentials and the second potentials, and controlling at least one LED to generate a luminous behavior through the driving commands. The partition potential has a first time width, the first potential has a second time width, and the second potential has a third time width; the first time width is different from the second time width and the third time width.

In order to achieve the above objective, the present invention further provides a control method of a light emitting diode string control system. The control method is based on a lighting command to provide a control signal to control at least one LED module of the LED lamp string to generate lighting behavior, and the lighting command is composed of a plurality of first digital logics and a plurality of second digital logics according to a specific sequence. The control method comprises the following steps: (a) The potential of the control signal is adjusted to a plurality of first potentials based on each of the first digital logic. (b) The potential of the control signal is adjusted to a plurality of second potentials based on each of the second digital logic. (c) The control signal is adjusted from the first potential to the second potential directly or from the second potential to the first potential directly based on the interleaved first digital logic and the second digital logic. (d) The potential of the control signal is adjusted from the first potential to the second potential based on the continuous first logic and is used as a separating potential for separating two continuous first potentials. The potential of the control signal is adjusted from the second potential to the first potential based on the continuous second logic and is used as a separating potential for separating two continuous second potentials. The first potential has a second time width, and the second potential has a third time width; the first time width is different from the second time width and the third time width.

The invention has the beneficial effects that the LED lamp string control system uses the level of the control signal and the time width as the digital logic of 0 or 1 instead of using the time width alone, so that the LED module can judge whether the time width of the control signal is represented as 0 or 1 after not waiting for the complete time width of specific logic, the condition that the logic cannot be identified due to waveform distortion is avoided, and the effect of greatly reducing the time for transmitting and judging the luminous command can be achieved.

Drawings

FIG. 1 is a system block diagram of a LED light string control system with signal recognition function according to the present invention;

FIG. 2A is a circuit block diagram of a LED string control system using a signal terminal to transmit control signals according to a first embodiment of the present invention;

FIG. 2B is a circuit block diagram of a second embodiment of a LED string control system using a signal terminal to transmit control signals according to the present invention;

FIG. 2C is a circuit block diagram of a LED string control system using a signal terminal to transmit control signals according to a third embodiment of the present invention;

FIG. 3 is a block diagram of a LED string control system using a carrier to transmit control signals according to the present invention;

FIG. 4 is a circuit block diagram of the voltage generating device of the present invention;

FIG. 5A is a block diagram of a first embodiment of a LED light string control system using a carrier to transmit control signals according to the present invention;

FIG. 5B is a schematic diagram of signal waveforms of a LED string control system according to a first embodiment using a carrier to transmit control signals;

FIG. 6 is a block diagram of a second embodiment of a LED string control system using a carrier to transmit control signals according to the present invention;

FIG. 7 is a flow chart of a control method of the LED string control system of the present invention.

In the figure:

100 … led string control system; 1 … LED string; 12-1 to 12-4 … light emitting diode modules; 122 … controller; an LED … light emitting diode; v+ … positive terminal; v- … negative terminal; a DI … signal receiving terminal; a DO … signal output; 3 … control module; 3A, 3B … controllers; 3+ … bus positive side; 3- … bus negative terminal; 3S … signal end; 30. 30B, 30E … voltage generating means; 32. 32a … first voltage generating circuit; q1 … first switch; 34. 34A, 34E … second voltage generating circuits; ZD1 … first voltage stabilizing element; q2 … second switch; 342 … a first voltage generating module; 344 … a first unidirectional conductive element; GND … ground; p … node; vdc … dc voltage; vin … input voltage; v1 … first voltage; v2 … second voltage; CL … light command; CD … drive command; h … first digital logic; l … second digital logic; sc … control signal; VH … first potential; VL … second potential; VI … region potential; S100-S500 ….

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to limit the invention, so that those skilled in the art may better understand the invention and practice it.

Fig. 1 is a system block diagram of a led string control system with signal recognition according to the present invention. The light emitting diode string control system 100 receives the dc voltage Vdc, and the light emitting diode string control system 100 includes a light emitting diode string 1 and a control module 3. The led string 1 receives a dc voltage Vdc and includes a plurality of led modules 12-1 to 12-4 (4 led modules are shown in the present invention, but 1 led module is not excluded). The control module 3 also receives the DC voltage Vdc required for operation and is coupled to the LED modules 12-1 to 12-4. The control module 3 provides a control signal Sc based on the lighting command CL to control the led modules 12-1 to 12-4 to generate lighting (e.g. on/off, flashing, etc.). Further, each of the LED modules 12-1 to 12-4 includes an LED controller 122 and at least one LED, and the LED controller 122 is coupled to the LED. For example, but not limited to, the LED modules 12-1 to 12-4 may include LEDs of unit colors, LEDs of three primary colors and/or LEDs of other colors, and the LED controller 122 controls the light emitting behaviors of the LEDs based on the control signal Sc. The control signal Sc may be transmitted by using various techniques, such as, but not limited to, carrier control, signal line transmission, etc., and thus is indicated by a dashed line, which will be further described later.

Further, the lighting command CL generally includes digital logic consisting of "0" and "1", mainly "0" and "1" are combined according to a specific ordering arrangement (e.g., without limitation, "11010"). By encoding the digital logic, specific LED modules 12-1 through 12-4 can be designated to produce specific lighting behaviors. For example, but not limited to, "00", "101" designates the light emitting behavior of the light emitting diode module 12-1 (corresponding to "00") to produce a flicker (corresponding to "101"). Therefore, the LED controller 122 of each LED module 12-1 to 12-4 can know the self-generated light emitting behavior based on the specific signal segment in the digital logic. That is, the digital logic may include at least one logic segment, and each LED module 12-1 to 12-4 correspondingly extracts the signal segment corresponding to the logic segment to which itself belongs in the control signal Sc, so as to generate the light emitting behavior accordingly.

For example, digital logic consists of a single logic segment. The control module 3 generates a control signal Sc consisting of 4 sets of signal segments based on the segmentation of this single logical segment. The LED modules 12-1 to 12-4 respectively extract the self-belonging signal segments so as to correspondingly generate the luminous behaviors. Alternatively, the digital logic is made up of 4 sets of logic segments. The control module 3 integrates the 4 sets of logic segments to generate a control signal Sc of a single signal segment. The LED modules 12-1 to 12-4 respectively receive the control signal Sc, and extract the signal small segments belonging to the LED modules from the single signal segment, so as to correspondingly generate the luminous behaviors. Alternatively, the digital logic is comprised of a single logic segment. The control module 3 generates a control signal Sc consisting of 8 sets of signal segments based on the segmentation of this single logical segment. The LED modules 12-1 to 12-4 respectively extract two signal sections belonging to the LED modules, so as to correspondingly generate luminous behaviors.

Specifically, the light-emitting command CL may include a plurality of first digital logic H (e.g., but not limited to "1") and a plurality of second digital logic L (e.g., but not limited to "0"), and preferably may be configured by a specific order formed by the plurality of first digital logic H, the plurality of second digital logic L and/or a combination of the two according to actual requirements. The present invention is mainly implemented by the combination of the two embodiments, but is not limited thereto. Further, the control module 3 may provide a plurality of first potentials VH and a plurality of second potentials VL respectively based on the first digital logic H and the second digital logic L of the light-emitting command CL to form the control signal Sc. Accordingly, the control module 3 adjusts the potential of the control signal Sc to the first potential VH (e.g., but not limited to, 3V, 5V, etc.) based on the first digital logic H of the light-emitting command CL accordingly. The control module 3 also adjusts the potential of the control signal Sc to a second potential VL (e.g., but not limited to, low potentials such as 0V, -3V, etc.) based on the second digital logic L of the light emission command CL accordingly.

Further, the control module 3 can adjust the electric potential based on the first digital logic H and the second digital logic L appearing successively. When the light-emitting command CL includes the first digital logic H and the second digital logic L that are staggered with each other, the control module 3 directly adjusts the potential of the control signal from the first potential VH to the second potential VL or directly from the second potential VL to the first potential VH based on the staggered arrangement. The term "directly" refers to that the control module 3 adjusts the first potential VH to the second potential VL, or adjusts the second potential VL to the first potential VH, and the potential is not maintained at a specific value for a specific time. For example, the control module 3 may adjust the potential of the control signal Sc directly and uninterruptedly from the first potential VH to the second potential VL based on the subsequent occurrence of the first digital logic H and the second digital logic L, or adjust the potential of the control signal Sc directly and uninterruptedly from the second potential VL to the first potential VH based on the subsequent occurrence of the second digital logic L and the first digital logic H. It should be noted that, in an embodiment of the present invention, the logic, the signals and the corresponding relationships thereof are only examples, and are not limited thereto.

Because the led string control system 100 determines the digital logic of "0" or "1" according to the level of the control signal Sc and the time width, the digital logic is not determined by the time width alone. Therefore, if the first digital logic H is consecutive or the second digital logic L is consecutive, it is necessary to divide the logic to avoid that the consecutive logic is determined as a single logic. Therefore, when the first digital logic H continuously appears in the light-emitting command CL, the control module 3 adjusts the potential of the control signal Sc from the first potential VH to the second potential VL and uses the first potential VH as the dividing potential VI for dividing two continuous first potentials VH. Similarly, the control module 3 may also adjust the potential of the control signal Sc from the second potential VL to the first potential VH and serve as a partition potential VI for generating two consecutive second potentials VL based on the light-emitting command CL when the second digital logic L continuously appears.

Further, the first potential VH and the second potential VL serving as the separation potential VI are different in time width from the first potential VH and the second potential VL corresponding to the first digital logic H and the second digital logic L. Specifically, the difference between the potential VI and the first and second potentials VH and VL must be clearly distinguished, so that the difference is aided by the matching time width in addition to the digital logic for determining "0" or "1" by using the potential level. Specifically, the partition potential VI has a first time width, the first potential VH has a second time width, and the second potential VL has a third time width.

The control module 3 sets a first time width, a second time width, and a third time width based on the light emission command CL, so that the first time width is different from the second time width and the third time width, and the partition potential VI is different from the first potential VH and the second potential VL. Further, the control module 3 may set and limit the first time width to be smaller than the second time width and the third time width, respectively, or set and limit the first time width to be larger than the second time width and the third time width, respectively, which may be the same or different. In a preferred embodiment, the shorter the time of transmission of the control signal Sc, the better, so the first time width is smaller than the second time width, and the first time width is smaller than the third time width.

The control module 3 may directly adjust the potential of the control signal Sc to the corresponding isolation potential VI when two consecutive identical digital logics are detected, or may generate an interval logic (generated by itself inside the control module 3) for isolating between the two consecutive identical logics when two consecutive identical logics are detected, and then adjust the potential of the control signal Sc to the isolation potential VI different from the first potential VH and the second potential VL based on the interval logic. Thus, the LED controller 122 of the LED modules 12-1 to 12-4 can correspondingly generate the driving command CD based on the first potential VH and the second potential VL (the partition potential VI is only used for partition), so as to control the LED to generate the lighting behavior based on the driving command CD. It should be noted that in an embodiment of the present invention, the LED modules 12-1 to 12-4 are coupled in series, but may be coupled in parallel (not shown).

The main purpose and effect of the present invention is that, because the led string control system 100 uses the level of the control signal Sc and the time width to serve as the digital logic of "0" or "1", instead of using the time width alone as the digital logic of "0" or "1", the led modules 12-1 to 12-4 can determine whether the time width of the control signal Sc is represented as "0" or "1" without waiting for the complete time width of the specific logic, and the condition that the control signal Sc cannot be identified due to waveform distortion can be avoided, so that the effect of greatly reducing the time of transmitting and determining the lighting command CL can be achieved. It should be noted that, in an embodiment of the present invention, the led string control system 100 is a two-wire control system, or a three-wire control system, which will be further described below and not be repeated herein.

Please refer to fig. 2A for a circuit block diagram of a first embodiment of the led string control system using a signal terminal to transmit control signals, fig. 2B for a circuit block diagram of a second embodiment of the led string control system using a signal terminal to transmit control signals, and fig. 2C for a circuit block diagram of a third embodiment of the led string control system using a signal terminal to transmit control signals, in combination with fig. 1. In fig. 2A to 2C, the control module 3 of the led string control system 100 is a controller 3A with a signal terminal. In FIG. 2A, the controller 3A includes a positive bus terminal 3+, a negative bus terminal 3-and a signal terminal 3S, and each LED module 12-1 to 12-4 includes a positive terminal V+, a negative terminal V-and a signal receiving terminal DI, respectively. The controller 3A receives the input voltage Vin required by the operation through the positive bus terminal 3+ and the negative bus terminal 3-, and the LED modules 12-1 to 12-4 receive the input voltage Vin required by the operation through the positive terminal V+ and the negative terminal V-. Because the controller 3A and the LED modules 12-1 to 12-4 are in a parallel architecture, and the power source received by the LED string light control system 100 is the DC voltage Vdc, the input voltage Vin is the DC voltage Vdc. The signal receiving terminal DI is configured to receive the control signal Sc, so as to correspondingly generate a driving command CD based on the control signal Sc, and control the light emitting diode LED to generate a light emitting action through the driving command CD.

Specifically, the LED controller 122 of the LED modules 12-1 to 12-4 receives the input voltage Vin through the positive terminal V+ and the negative terminal V-, and the LED controller 122 of the LED modules 12-1 to 12-4 receives the control signal Sc provided by the signal terminal 3S through the signal receiving terminal ID because the signal receiving terminals DI of the LED modules 12-1 to 12-4 are respectively coupled to the signal terminal 3S. The control signal Sc is composed in a specific order as described above and has a continuously varying first potential VH and second potential VL (i.e. the switching between the first potential VH and the second potential VL is direct and uninterrupted). In addition, the control signal Sc has a first potential VH and/or a second potential VL as a partitioning potential VI for partitioning two consecutive first potentials VH and/or partitioning two consecutive second potentials VL. The controller 122 of the LED modules 12-1 to 12-4 can recognize the partition potential VI and know that the partition potential VI is only used for partition, so that the controller 122 can know two continuous first potentials VH and/or two continuous second potentials VL by recognizing the partition potential VI and correspondingly generate the driving command CD based on the specific sequence of the first potentials VH and the second potentials VL of the control signal Sc. Thus, the light emitting diode LED can be controlled to generate light emitting behaviors through the drive command CD. Since the time width of the partition potential VI (i.e., the first time width) is different from the time widths of the first potential VH and the second potential VL (i.e., the second time width is different from the third time width), the controller 122 can identify the partition potential VI through the difference of the time widths.

In FIG. 2B, the circuit architecture of the LED string control system 100 is similar to that of FIG. 2A, except that the LED modules 12-1 to 12-4 further include a signal output DO. The LED modules 12-1 to 12-4 are serially connected to each other, and the signal output terminal DO is sequentially coupled to the signal receiving terminal DI of the previous stage LED module 12-1 to 12-4, and the signal receiving terminal DI of the serially connected LED module 12-1 is coupled to the signal terminal 3S of the controller 3A to receive the control signal Sc provided by the signal terminal 3S. After the LED module 12-1 at the serial head end receives the control signal Sc from the signal receiving end DI, the control signal Sc may be processed by the internal LED controller 122 or transmitted through an internal circuit, and then provided to the signal output end DO, so as to provide the control signal Sc received by the LED controller 122 to the expansion module coupled to the rear end. In an embodiment of the present invention, the expansion module refers to the led modules 12-1 to 12-4 coupled thereto, but not limited thereto, and may be any module requiring the use of the control signal Sc. It should be noted that, in an embodiment of the present invention, the circuit structure and the operation manner not mentioned in fig. 2B are the same as those of fig. 2A, and are not repeated here.

In FIG. 2C, the circuit architecture of the LED string control system 100 is slightly different from that of FIGS. 2A and 2B, and the main difference is that the LED modules 12-1 to 12-4 are serially connected. Specifically, in FIG. 2C, besides the signal output terminal DO of FIG. 2B is coupled in series, the LED modules 12-1 to 12-4 are also coupled in series, such that the positive terminal V+ is coupled to the negative terminal V-of the previous stage LED module 12-1 to 12-4 in sequence. The positive terminal v+ of the led module 12-1 connected in series with the positive terminal V-of the led module 12-4 connected in series with the tail terminal receives the dc voltage Vdc, so that the input voltage Vin received by each led module 12-1 to 12-4 is an average value in number. It should be noted that, in an embodiment of the present invention, the circuit structure and the operation manner not mentioned in fig. 2C are the same as those of fig. 2A, and are not repeated here.

Fig. 3 is a circuit block diagram of a light emitting diode string control system using a carrier to transmit a control signal according to the present invention, and fig. 1-2C are combined. The difference between fig. 3 and fig. 2A to fig. 2C is that the control module 3 does not include a signal terminal, and the control signal Sc is transmitted by adding the control signal Sc to the dc voltage Vdc. In the embodiment of fig. 3, the control module 3 includes a voltage generating device 30 and a controller 3B, and the led string 1 and the controller 3B receive the dc voltage Vdc. The voltage generating device 30 is coupled to the LED light string 1, and the controller 3B is coupled to the voltage generating device 30. The controller 3B mainly controls the voltage generating device 30 to generate a specific voltage with a specific order based on the light emitting command CL, so that the dc voltage Vdc is affected by the specific voltage with the specific order to generate a potential change of the voltage across the two ends of the led string 1, and the voltage across the potential change is the control signal Sc.

The LED controller 122 of each LED module 12-1 to 12-4 knows the self-generated light emission line based on the variation of the control signal Sc, and accordingly controls the LEDs accordingly. The controller 3B controls the voltage generating device 30 to generate a specific voltage based on the first digital logic H to adjust the control signal Sc to a first potential VH (e.g., without limitation, a higher signal) of a difference between the dc voltage Vdc and the specific voltage. The controller 3B also controls the voltage generating device 30 to generate another specific voltage based on the second digital logic L to adjust the control signal Sc to a second potential VL (e.g., without limitation, a lower signal) of a difference between the dc voltage Vdc and the another specific voltage.

Fig. 4 is a circuit block diagram of the voltage generating device of the present invention, and fig. 1 to 3 are combined. The voltage generating device 30 includes a first voltage generating circuit 32 and a second voltage generating circuit 34, and the first voltage generating circuit 32 and the second voltage generating circuit 34 are respectively coupled to the led string 1 and the controller 3B. When the light-emitting command CL is the first digital logic H, the controller 3B controls the first voltage generating circuit 32 to generate the first voltage V1 based on the first digital logic H so as to adjust the control signal Sc to the first potential VH. When the light emitting command CL is the second digital logic L, the controller 3B controls the second voltage generating circuit 34 to generate the second voltage V2 based on the second digital logic L so as to adjust the control signal Sc to the second potential VL.

The controller 3B generates the second potential VL and the first potential VH in the opposite directions between the continuous first potential VH and the continuous second potential VL, respectively, based on the continuous first digital logic H or the continuous second digital logic L. The controller 3B controls the second voltage generating circuit 34 to generate the second voltage V2 based on the first digital logic H that the light-emitting command CL is continuous, so as to take the second voltage V2 as the partition potential VI. Thus, the consecutive first digital logic H can be separated from each other, and erroneous judgment as a single logic can be avoided. On the other hand, the controller 3B controls the first voltage generating circuit 32 to generate the first voltage V1 based on the light-emitting command CL as the consecutive second digital logic L, so that the first voltage V1 is used as the dividing bit VI, and the consecutive second digital logic L can be divided. It should be noted that, in an embodiment of the present invention, the controllers 3A and 3B may be controllers composed of circuits (such as operational amplifiers, resistors, capacitors, etc.), logic gates, etc., or may be programmable microcontrollers, and the controllers 3A and 3B may further include a detection unit (not shown) for detecting the voltage/current at each point of the led string control system 100, so as to stabilize the operation of the whole system by detecting/feeding back.

Fig. 5A is a detailed circuit block diagram of a first embodiment of the led string control system according to the present invention, and fig. 5B is a signal waveform diagram of the led string control system according to the first embodiment of the present invention, with reference to fig. 1 to 4. In the voltage generating device 30B, the first voltage generating circuit 32A includes a first switch Q1, the first switch Q1 is coupled to the led string 1 and the ground GND, and a control terminal of the first switch Q1 is coupled to the controller 3B. The controller 3B controls the first switch Q1 to be turned on based on the light emitting command CL as the first digital logic H, so as to ground one end of the led string 1. In this state, since one end of the led string 1 is grounded and the other end receives the dc voltage Vdc, the grounding voltage (usually 0V) of the grounding point GND is the first voltage V1, and the control signal Sc (the first potential VH) of the led string 1 is the dc voltage Vdc (see fig. 5B). On the contrary, when the light-emitting command CL is not the first digital logic H, the controller 3B controls the first switch Q1 to be turned off, so that the path of the first voltage generating circuit 32A is opened.

The second voltage generating circuit 34A is connected in parallel to the first voltage generating circuit 32A, and the second voltage generating circuit 34A includes a first voltage stabilizing device ZD1 and a second switch Q2. The first voltage stabilizing element ZD1 is coupled to the led string 1, the second switch Q2 is coupled to the first voltage stabilizing element ZD1 and the ground GND, and the control end of the second switch Q2 is coupled to the controller 3B. The controller 3B controls the second switch Q2 to be turned on based on the light emitting command CL to the second digital logic L, and the first voltage stabilizing element ZD1 generates the second voltage V2 based on the second switch Q2 to be turned on. In this state, since one end of the led string 1 receives the second voltage V2 and the other end receives the dc voltage Vdc, the control signal Sc (the second potential VL) is adjusted to the dc voltage Vdc minus the second voltage V2 (see fig. 5B). For example, but not limited to, when the second switch Q2 is turned on, the first voltage stabilizing element ZD1 can generate a second voltage V2 of 30V, and the second voltage VL is the dc voltage Vdc (assumed to be 100V) minus 30V. On the contrary, when the light emitting command CL is not the second digital logic L, the controller 3B controls the second switch Q2 to be turned off, so that the path of the second voltage generating circuit 34A is opened. The first voltage stabilizing device ZD1 may be, for example, but not limited to, a zener diode, but not limited to, any device or circuit that can be used for stabilizing voltage should be included in the scope of the present embodiment.

Further, the controller 3B controls the second switch Q2 to be turned on based on the first digital logic H with the continuous light-emitting command CL, so that the first voltage stabilizing device ZD1 generates the second voltage V2 as the partition potential VI. On the contrary, the controller 3B controls the first switch Q1 to be turned on based on the second digital logic L that is continuous with the light-emitting command CL, so as to generate the first voltage V1 (i.e. the dc voltage Vdc) as the partition potential VI. Preferably, the first voltage V1 and the second voltage V2 of the potential VI are separated by about 1/5 to 1/10 of the second time width T2 of the first potential VH (the third time width T3 of the second potential VL) so as to separate the potential VI from the first potential VH and the second potential VL to avoid erroneous judgment.

Fig. 6 is a detailed circuit block diagram of a second embodiment of a led string control system using a carrier to transmit control signals according to the present invention, and fig. 1-5B are combined. The voltage generating device 30E of the present embodiment is different from the voltage generating device 30B of fig. 5A in that the second voltage generating circuit 34E includes a first voltage generating module 342 and a first unidirectional conductive element 344. The first voltage generation module 342 is coupled to a node P between the led string 1 and the first switch Q1 of the first voltage generation circuit 32A, and the first unidirectional conductive element 344 is coupled between the node P and the first voltage generation module 342. The controller 3B is coupled to the first voltage generating module 342, and the first unidirectional conducting element 344 is used for unidirectional conducting the path of the node P to the first voltage generating module 342. It should be noted that in an embodiment of the present invention, the preferred embodiment of the first voltage generating module 342 may be a voltage generator, but not limited thereto. It is within the scope of the present embodiment to include any devices/circuits/elements that can be used to generate a specific voltage source based on the control of the controller 3B.

The control manner is similar to fig. 5A, when the light emitting command CL is the second digital logic L, the controller 3B controls the first voltage generating module 342 to generate the second voltage V2 based on the second digital logic L, so that the control signal Sc (the second potential VL) is adjusted to the dc voltage Vdc minus the second voltage V2. On the contrary, when the light emitting command CL is not the second digital logic L, the first voltage generating module 342 does not operate and does not generate the second voltage V2. When the light-emitting command CL is the continuous first digital logic H or the continuous second digital logic L, the controller 3B controls the first voltage generating module 342 to generate the second voltage V2 or controls the first switch Q1 to be turned on based on the continuous first digital logic H or the continuous second digital logic L, so that the control signal Sc (the partition potential VI) is adjusted to the dc voltage Vdc minus the second voltage V2 or the ground voltage of the ground GND. It should be noted that, in an embodiment of the present invention, elements not described in fig. 6, coupling relationships between the elements, and operation manners thereof are the same as those of fig. 5A, and are not described herein again. In addition, in an embodiment of the present invention, the first unidirectional conducting element 344 may be a diode, but is not limited thereto. For example, devices that can be used for unidirectional conduction (such as, but not limited to, thyristors, etc.) are included within the scope of the present embodiments.

Please refer to fig. 7, which is a flowchart illustrating a control method of the led string control system according to the present invention, and further refer to fig. 1-6. The control method of the control system of the light emitting diode string control system 100 mainly controls the light emitting diode string control system 100 to judge the digital logic of "0" or "1" according to the time width of the level of the control signal Sc, instead of judging the digital logic simply according to the time width. The control method includes adjusting a control signal to a first potential based on a first digital logic of a light emission command (S100). In a preferred embodiment, the control module 3 adjusts the potential of the control signal Sc to the first potential VH (for example, but not limited to, a high potential) according to the first digital logic H of the light-emitting command CL. Then, the control signal is adjusted to a second potential based on the second digital logic of the light emission command (S200). In a preferred embodiment, the potential of the control signal Sc is adjusted to the second potential VL (for example, but not limited to, a low potential) by the control module 3 based on the second digital logic L of the light emission command CL.

Then, the potentials of the control signals are adjusted from the first potential to the second potential directly or from the second potential to the first potential directly in the staggered order based on the staggered first digital logic and the second digital logic (S300). In a preferred embodiment, when the light-emitting command CL includes the first digital logic H and the second digital logic L that are staggered, the control module 3 adjusts the electric potential in an uninterrupted manner, so that the control signal Sc has the first electric potential VH and the second electric potential VL that are continuously changed. For example, the control module 3 may adjust the potential of the control signal Sc directly and uninterruptedly from the first potential VH to the second potential VL based on the subsequent occurrence of the first digital logic H and the second digital logic L, or adjust the potential of the control signal Sc directly and uninterruptedly from the second potential VL to the first potential VH based on the subsequent occurrence of the second digital logic L and the first digital logic H.

Then, the potential of the control signal is adjusted from the first potential to the second potential based on the continuous first logic and used as the partition potential (S400). In a preferred embodiment, the control module 3 adjusts the potential of the control signal Sc from the first potential VH to the second potential VL and uses the first potential VH as the dividing potential VI for dividing two consecutive first potentials VH when the first digital logic H continuously appears in the light-emitting command CL. Finally, the potential of the control signal is adjusted from the second potential to the first potential based on the continuous second logic and is used as the partition potential (S500). In a preferred embodiment, the control module 3 may also adjust the potential of the control signal Sc from the second potential VL to the first potential VH and serve as a dividing potential VI for dividing the two continuous second potentials VL when the second digital logic L is continuously present in the light-emitting command CL. Since the difference between the isolation potential VI and the first and second potentials VH and VL must be clearly defined, the isolation potential VI has a first time width, the first potential VH has a second time width, and the second potential VL has a third time width. Since the shorter the time of the transmission of the control signal Sc, the better, the first time width is smaller than the second time width, and the first time width is smaller than the third time width. It should be noted that, in an embodiment of the present invention, the steps (S100) - (S500) are specific to the internal circuit structure of the led string control system 100, and are not described in detail herein with reference to fig. 5A-6.

The above-described embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present invention, and are intended to be within the scope of the present invention. The protection scope of the invention is subject to the claims.

Claims (10)

1. A light emitting diode light string control system, comprising:

a light-emitting diode light string, comprising a plurality of light-emitting diode modules; and

The control module is coupled with each light emitting diode module and provides a control signal based on a light emitting command to control each light emitting diode module to generate a light emitting behavior;

the control module provides corresponding first potentials and second potentials to form the control signal based on the first digital logic and the second digital logic of the light-emitting command respectively;

when the light emitting command comprises a first digital logic and a second digital logic which are staggered, the control module directly adjusts the potential of the control signal from the first potential to the second potential or directly adjusts the potential from the second potential to the first potential based on the staggered sequence;

When the lighting command comprises continuous first logic, the control module adjusts the potential of the control signal from the first potential to the second potential and uses the control signal as a partition potential for partitioning two continuous first potentials; when the lighting command comprises continuous second logic, the control module adjusts the potential of the control signal from the second potential to the first potential and uses the second potential as the partition potential for partitioning two continuous second potentials; and

Wherein the partition potential has a first time width, the first potential has a second time width, and the second potential has a third time width; the first time width is different from the second time width and the third time width.

2. The led light string control system of claim 1, wherein the control module comprises:

the voltage generating device is coupled with the LED lamp string; and

The controller is coupled with the voltage generating device to control the voltage generating device to adjust a direct current voltage received by the light emitting diode lamp string into the control signal based on the light emitting command.

3. The led light string control system of claim 2, wherein the voltage generating means comprises:

The first voltage generating circuit is coupled with the LED lamp string and the controller; and

The second voltage generating circuit is coupled with the LED lamp string and the controller;

the controller generates a first voltage by controlling the first voltage generating circuit so as to adjust the control signal to the first potential; the controller generates a second voltage by controlling the second voltage generating circuit to adjust the control signal to the second potential.

4. The led light string control system of claim 3, wherein the first voltage generation circuit comprises:

the first switch is coupled with the LED lamp string and the controller;

the controller uses a ground voltage as the first voltage by controlling the first switch to be conducted, so that a direct current voltage received by the LED lamp string is used as the first potential.

5. The LED light string control system of claim 4, wherein the second voltage generating circuit is connected in parallel with the first voltage generating circuit and comprises:

the first voltage stabilizing element is coupled with the LED lamp string; and

A second switch coupled to the voltage stabilizing unit and the controller;

The first voltage stabilizing element controls the second switch to be conducted based on the controller to generate the second voltage so as to adjust the control signal to the second potential of the direct current voltage minus the second voltage.

6. The LED light string control system of claim 4, wherein the second voltage generation circuit comprises:

the first voltage generating module is coupled with a node between the LED lamp string and the first switch; and

The first unidirectional conduction element is coupled with the node and the first voltage generation module and is used for unidirectional conduction of a path from the node to the first voltage generation module;

the controller controls the first voltage generating module to generate the second voltage based on the second logic so as to adjust the control signal to the second potential of the direct current voltage minus the second voltage.

7. The LED light string control system of claim 1, wherein the first time width is smaller than the second time width and/or the first time width is smaller than the third time width.

8. A light emitting diode module for receiving a control signal including a plurality of first potentials and a plurality of second potentials, the light emitting diode module comprising:

An LED controller for receiving an input voltage required by operation through a positive terminal and a negative terminal and receiving the control signal through a signal receiving terminal; and

At least one Light Emitting Diode (LED) coupled to the LED controller;

wherein the control signal is composed according to a specific sequence and has a first potential and a second potential with direct change of potential, and has the first potential and/or the second potential as a partition potential for partitioning two continuous first potentials and/or partitioning two continuous second potentials; the LED controller is used for dividing two continuous first potentials and two continuous second potentials based on the dividing potential so as to correspondingly generate a driving command based on each first potential and each second potential, and controlling the at least one light emitting diode to generate a light emitting behavior through the driving command; and

Wherein the partition potential has a first time width, the first potential has a second time width, and the second potential has a third time width; the first time width is different from the second time width and the third time width.

9. A light emitting diode module as recited in claim 8, further comprising:

The signal output end is used for providing the control signal received by the LED controller to an expansion module coupled with the rear end.

10. A control method of a light emitting diode lamp string control system provides a control signal to control at least one light emitting diode module of a light emitting diode lamp string to generate a light emitting behavior based on a light emitting command, and the light emitting command is composed of a plurality of first digital logics and a plurality of second digital logics according to a specific sequence, and is characterized in that the control method comprises the following steps:

adjusting the potential of the control signal to a plurality of first potentials based on each of the first digital logic;

adjusting the potential of the control signal to a plurality of second potentials based on each of the second digital logic;

based on the first digital logic and the second digital logic of the staggered sequence, the potential of the control signal is directly adjusted from the first potential to the second potential or directly adjusted from the second potential to the first potential according to the staggered sequence;

adjusting the potential of the control signal from the first potential to the second potential based on the continuous first logic and taking the control signal as a partition potential for partitioning two continuous first potentials; and/or

Adjusting the potential of the control signal from the second potential to the first potential based on the continuous second logic and taking the second potential as the partition potential for partitioning two continuous second potentials;

wherein the partition potential has a first time width, the first potential has a second time width, and the second potential has a third time width; the first time width is different from the second time width and the third time width.