Light emitting diode lamp string control method

Abstract

A light-emitting diode lamp string control method comprises the following steps: executing an automatic coding program: a control unit provides a coding signal for a plurality of light-emitting diode modules to judge the sequence of the light-emitting diode modules on the lamp string so as to complete automatic coding; and executing a device connection program: connecting the mobile equipment to the control unit. And executing an image positioning program: operating an image acquisition unit of the mobile equipment, and taking an image of the position of the light-emitting diode module in an image acquisition mode. And executing a light-emitting control program: operating the mobile equipment to provide a light-emitting control signal to the control unit, and controlling the specified light-emitting action of the specified light-emitting diode module by the control unit according to the light-emitting control signal. Therefore, an operator can more intuitively and conveniently operate and control diversified light emitting modes and effects of the light emitting diode lamp string.

Description

Technical Field

[0001] The present invention relates to a method for controlling a light-emitting diode (LED) light string, and more particularly to a method for controlling an LED light string based on image acquisition. Background Art

[0002] Since light-emitting diodes (LEDs) have the advantages of high luminous efficiency, low power consumption, long lifespan, fast response speed, high reliability, etc., LEDs have been widely applied in lighting fixtures or decorative lighting in the form of series, parallel, or series-parallel connections of light bars or light strings, such as Christmas tree lights, special lighting effects for sports shoes, etc.

[0003] Taking festival lighting as an example, a complete LED lighting fixture basically includes an LED light string (with a plurality of lights) and a driving unit for driving the lights. The driving unit is electrically connected to the light string and controls the lights in a point-control or synchronous manner by providing the required power and a control signal with luminous data to achieve diverse lighting output effects and variations of the LED lighting fixture.

[0004] In current technologies, in order to drive each of the LEDs in the LED light string to emit light diversely, each of the LEDs has different address sequence data. Each of the LEDs receives a luminous signal containing luminous data (which may include address data): if the address sequence data of the LED is the same as the address data of the luminous signal, the LED emits light according to the luminous data of the luminous signal; if the address sequence data of the LED is different from the address data of the luminous signal, the LED skips the luminous data of the luminous signal.

[0005] Currently, the sequencing methods for each of the LEDs in the LED light string are mostly very complex or difficult; for example, before each of the LEDs is combined into an LED light string, different address sequence data needs to be burned into each LED. Then, each of the LEDs is placed and combined into the LED light string in sequence according to the address sequence data. If each of the LEDs is not placed in sequence according to the address sequence data, diverse lighting of each of the LEDs cannot be achieved correctly.

[0006] Furthermore, how to enable an operator to more intuitively and conveniently operate and control diverse lighting modes and effects of the LED light string still needs to be further developed. Summary of the Invention

[0007] The object of the present invention is to provide a method for controlling an LED light string to solve the problems existing in the prior art.

[0008] To achieve the above object, the present invention provides a method for controlling a light-emitting diode lamp string, wherein the light-emitting diode lamp string includes a plurality of light-emitting diode modules and a control unit, and the control method includes the steps of: executing an automatic coding program: the control unit provides a coding signal for each of the light-emitting diode modules to determine its own order on the lamp string to complete automatic coding. Executing a device connection program: connecting a mobile device to the control unit. Executing an image positioning program: operating an image acquisition unit of the mobile device to capture images of the positions of each of the light-emitting diode modules by means of image acquisition. Executing a light-emitting control program: operating the mobile device to provide a light-emitting control signal to the control unit, and the control unit controls a specified light-emitting action of a specified light-emitting diode module according to the light-emitting control signal.

[0009] In one embodiment, in the image positioning program, according to the imaging result, a position information of the position of each of the light-emitting diode modules is generated.

[0010] In one embodiment, the position information may be graphical or text data.

[0011] In one embodiment, in the light-emitting control program, the position information is used to control a specified light-emitting action of a specified light-emitting diode module.

[0012] In one embodiment, each of the light-emitting diode modules forms a light-emitting diode lamp string with a series connection architecture, and the automatic coding program is a corresponding series automatic coding program.

[0013] In one embodiment, in the series automatic coding program, each of the light-emitting diode modules determines its own order according to different complex time differences to achieve automatic coding.

[0014] In one embodiment, the control method includes: initially controlling the working voltage of each of the light-emitting diode modules to be lower than an identification voltage to establish an initial reference time. Gradually increasing the working voltage of each of the light-emitting diode modules, and when the identification voltage is reached, generating different time differences starting from the initial reference time.

[0015] In one embodiment, the magnitudes of the generated time differences are compared with a range of complex time differences to determine the order of each of the light-emitting diode modules.

[0016] In one embodiment, each of the light-emitting diode modules forms a light-emitting diode lamp string with a parallel connection architecture, and the automatic coding program is a corresponding parallel automatic coding program.

[0017] In one embodiment, in the parallel automatic coding program, the generated voltages are of different magnitudes, and the order of each is determined to achieve automatic coding.

[0018] In one embodiment, the control method includes: connecting each of the light-emitting diode modules in parallel through a power supply line having a plurality of line resistances, each of the light-emitting diode modules including an impedance element that can provide impedance characteristics; each of the light-emitting diode modules connected in parallel receiving the power supply; and the power supply passing through each of the line resistances and each of the impedance elements, such that the voltages generated on each of the light-emitting diode modules are of different magnitudes, and coding each of the light-emitting diode modules.

[0019] With the proposed control method for the light-emitting diode lamp string, the circuit design can be simplified, the sequencing coding and image acquisition of the light-emitting diode lamp string can be completed quickly, and further, the operation and control of various light-emitting modes of the light-emitting diode lamp string can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 : is a flowchart of the control method for the light-emitting diode lamp string of the present invention.

[0021] Figure 2 : is a flowchart of the serial automatic sequencing of the present invention.

[0022] Figure 3 : is a flowchart of the parallel automatic sequencing of the present invention.

[0023] Figure 4 : is a schematic diagram of the first embodiment of the control of the light-emitting diode lamp string based on image acquisition of the present invention.

[0024] Figure 5 : is a schematic diagram of the second embodiment of the control of the light-emitting diode lamp string based on image acquisition of the present invention.

[0025] Figure 6 : is a schematic diagram of the third embodiment of the control of the light-emitting diode lamp string based on image acquisition of the present invention.

[0026] Figure 7 : is a schematic diagram of the fourth embodiment of the control of the light-emitting diode lamp string based on image acquisition of the present invention.

[0027] Figure 8 : is a schematic diagram of the third embodiment of the control of the light-emitting diode lamp string based on image acquisition of the present invention.

[0028] Figure 9 : is a schematic diagram of the control of the light-emitting diode lamp string by the present invention on a mobile device.

[0029] Figure 10 : is a waveform schematic diagram with automatic coding achieved by the present invention through a time calculation method.

[0030] Figure 11A : Circuit diagram of the first embodiment of the parallel sequencing light emitting diode lamp string powered by the constant voltage source of the present invention.

[0031] Figure 11B : Circuit diagram of the first embodiment of the parallel sequencing light emitting diode lamp string powered by the constant current source of the present invention.

[0032] Figure 11C : Circuit diagram of the second embodiment of the parallel sequencing light emitting diode lamp string powered by the constant voltage source of the present invention.

[0033] Figure 11D : Circuit diagram of the second embodiment of the parallel sequencing light emitting diode lamp string powered by the constant current source of the present invention.

[0034] Figure 11E : Voltage schematic diagram of the first embodiment of the parallel sequencing light emitting diode lamp string of the present invention.

[0035] Figure 11F : Voltage schematic diagram of the second embodiment of the parallel sequencing light emitting diode lamp string of the present invention.

[0036] In the figure: 10: Mobile device 101: Image acquisition unit 20: Light emitting diode lamp string 201: Control unit 202: Light emitting diode module VCC: Drive voltage 5: Ornament 6: Light emitting diode lamp string L001~L100: Light emitting diode module 100: Power line 200: Power setting unit 11,12,…,1N: Light emitting diode module R L1,RL2 ,…,R LN ,R L1’ ,R L2’ ,…,R LN’ : Line resistance R1, R2,…,R N : Resistance C1, C2,…,C N : Parasitic capacitance V1, V2,…,V N : Voltage Vdc: Power supply Idc: Power supply V DD : DC drive voltage V IDEN : Identification voltage t1~t 50 : Time T1~T 50:Time difference S10 - S40: Steps S301 - S302: Steps S401 - S403: Steps. Detailed implementation manners

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it, but the exemplified embodiments do not limit the present invention.

[0038] Please refer to Figure 1 shown, which is a flowchart of the method for controlling a light - emitting diode lamp string of the present invention, and in conjunction with referring to Figures 4 - 8 the schematic diagram of any embodiment of the control of the light - emitting diode lamp string based on image acquisition shown in the figures. The light - emitting diode lamp string 20 includes a plurality of light - emitting diode modules 202 and a control unit 201, and each of the light - emitting diode modules 202 is electrically connected to the control unit 201 and is powered and driven by a driving voltage VCC. Among them, Figures 4 - 8 the main differences of the three embodiments shown are that the forms and connection manners of the plurality of light - emitting diode modules 202 are different. Specifically, Figure 4 , Figure 5 is a series - connection structure, Figure 6 is a parallel - connection structure, Figure 7 is a parallel - series - connection structure, and Figure 8 is a series - parallel - connection structure. However, all of them can be applied to the method for controlling a light - emitting diode lamp string based on image acquisition proposed by the present invention.

[0039] Taking Figure 4 as an example, each of the light - emitting diode modules 202 is a two - pin lamp, and each of the light - emitting diode modules 202 is in a series - connection structure. And, in this embodiment, the image acquisition is realized by a mobile device, where the mobile device can be a smart phone, a tablet computer, a wearable device, etc. The mobile device 10 at least has a camera or a photographing lens with an image - acquisition function, which are collectively referred to as an image - acquisition unit.

[0040] The method for controlling a light - emitting diode lamp string of the present invention includes the steps: First, execute an automatic coding program (step S10), that is, the control unit 201 of the light - emitting diode lamp string 20 provides a coding signal for each of the light - emitting diode modules 202 to judge its own order on the lamp string to complete automatic coding.

[0041] Then, execute a device connection program (step S20), that is, connect the mobile device 10 to the control unit 201 of the LED light string 20. In an embodiment, the mobile device 10 can send a wireless signal, such as a Wi-Fi signal, a Bluetooth signal, or a ZigBee signal, to connect to the control unit 201. It is worth mentioning that the order of the above steps S10 and S20 is not used to limit the present invention, that is, the LED light string control method of the present invention includes that the device connection program can be executed first, and then the automatic coding program can be executed.

[0042] Then, execute an image positioning program (step S30), that is, operate an image acquisition unit 101 of the mobile device 10 to capture images of the positions of the LED modules by means of image acquisition. In this image positioning program, the image acquisition unit 101, such as the lens on the mobile device 10, can be used to capture images of the positions of the LED modules 202 in a photography (dynamic) or photographing (static) manner. Therefore, according to the results of the photography or photographing, a position information of the positions of the LED modules 202 is generated. Among them, the position information can be graphical or textual information. For example, the graphical position information is the relevant information of the position of each LED module after being imaged, and can include relative position, size, shape, etc. information in the frame. The textual information can be the position information of each LED module after being imaged, and record its relative position, size, shape, etc. information in the frame in text form. Among them, the textual information is not limited by its format and can be read and used by the developed application (app).

[0043] Refer to Figure 9 As shown, it is a schematic diagram of the present invention for controlling an LED light string by a mobile device. Based on the above content, the user can operate the image acquisition unit 101 of the mobile device 10 ( Figure 9 not shown). Taking static photographing as an example, the positions of the LED modules of the LED light string 6 hung on an ornament 5, such as but not limited to a Christmas tree, imaged by the image acquisition unit 101 are displayed on the screen of the mobile device 10, such as a touch screen.

[0044] After the image acquisition is completed, the generated image start signal includes the position information of the effective and actual LED modules detected, compared, and judged, that is, according to the imaged image, the information that does not belong to the LED module is excluded and filtered to completely record the position information of all LED modules.

[0045] Similarly, for dynamic photography, by the user operating the image acquisition unit 101 of the mobile device 10 to obtain consecutive frames of each of the light-emitting diode modules of the light-emitting diode lamp string 6 on the ornament 5 in a photographic manner, it is also possible to detect, compare, and determine the position information of the effective and actual light-emitting diode modules, so as to completely record the position information of all the light-emitting diode modules.

[0046] Therefore, regardless of whether the positions where the light-emitting diode modules 202 of the light-emitting diode lamp string 20 are hung on the ornament 5 are regular or irregular, it is possible to obtain the complete position information of the light-emitting diode modules 202 through dynamic imaging or static imaging of each of the light-emitting diode modules 202.

[0047] As Figure 4 shown, the two-pin lamp has a series structure (that is, each of the light-emitting diode modules 202 forms a light-emitting diode lamp string with a series connection architecture), or Figure 5 as shown, the four-pin lamp has a series structure (that is, each of the light-emitting diode modules 202 forms a light-emitting diode lamp string with a series connection architecture). In this encoding program, each of the light-emitting diode modules 202 determines its own order according to a plurality of time differences to achieve automatic encoding, which is described in detail below.

[0048] With reference to Figure 2 shown, which is a flowchart of the series automatic sequencing of the present invention. For a light-emitting diode lamp string with a series structure, in the present invention, automatic encoding is performed in a manner of a plurality of time differences, including step S301: initially controlling the working voltage of each of the light-emitting diode modules to be lower than an identification voltage to establish a starting reference time; and step S302: controlling the working voltage of each of the light-emitting diode modules to gradually increase, and when reaching the identification voltage, generating different time differences starting from the starting reference time. Therefore, automatic encoding is performed according to the different time differences.

[0049] Specifically, taking the light-emitting diode lamp string with the series connection architecture shown in Figure 10 as an example, and assuming that the number of light-emitting diode modules is 50 (or it can also be Figure 9 the light-emitting diode modules L001 to L100 with a number of 100 shown). Among them, each light-emitting diode module 202 includes an identification circuit, which can be implemented by series diodes, switches, and resistors. When the externally applied DC driving voltage V DD gradually increases, for example, since the forward bias voltage of three series diodes is 2.1 volts (0.7 volts for each), plus the forward bias voltage of the switch is 0.7 volts, the total forward bias voltage is 2.8 volts. Therefore, when the DC driving voltage V DDWhen it gradually increases but has not yet reached and is close to 2.8 volts (for example, but not limited to 2.6 volts), by turning off the switch, the DC drive voltage V DD instantly decreases and is lower than the recognition voltage V IDEN .

[0050] That is, before time t0, that is, before the starting reference time t0, when the switch is turned on, therefore, the DC drive voltage V DD instantly increases, and all the light-emitting diode modules become in a high-potential state. Then, at the starting reference time t0, the switch is turned off. At this time, the DC drive voltage V DD instantly decreases. As Figure 10 shown, when the DC drive voltage V DD instantly decreases and is lower than the recognition voltage V IDEN , the time at that moment is set as the starting reference time t0.

[0051] At this time, by switching the connection state of the switch, that is, switching from the path of the series diode and the switch to the path of the resistor, the time at this moment is recorded as the starting reference time t0, so that the starting reference time t0 can be generated (set) as the reference time for the usage time calculation method, and start calculating (recording) the time when the voltage of the light-emitting diode module gradually increases and reaches the recognition voltage V IDEN . Therefore, the time difference of the light-emitting diode module can be obtained. Taking the first light-emitting diode as an example, it is the first time difference T1 = t1 - t0.

[0052] At this time, the voltage waveforms of the positive voltage terminals of all 50 light-emitting diode modules with respect to the negative voltage terminals as a reference (hereinafter referred to as the relative voltage waveforms) are as shown in Figure 10 . According to the circuit characteristics as shown in Figure 10 , that is, for different light-emitting diode modules, the 50 groups of relative voltage waveforms presented have an obvious positive correlation with their series order. Therefore, according to this circuit characteristic, the series automatic sequencing of all 50 light-emitting diode modules is achieved through the time calculation method.

[0053] Specifically, since the relative voltage waveform is the voltage characteristic of an individual light-emitting diode module, in order to make all (50 groups) of the relative voltage waveforms be able to effectively judge the order of their corresponding light-emitting diode modules, therefore, by introducing the concept of the starting reference (benchmark) time, calculating the difference between the time of each relative voltage waveform and the starting reference time, a plurality of different time differences can be obtained. As shown in Figure 10 , since the DC drive voltage V DD gradually increases, the voltage of the first light-emitting diode module reaches the recognition voltage V IDENWhen, therefore, starting from the starting reference time t0 until the voltage of the first light-emitting diode module reaches the recognition voltage V IDEN The time difference between this time (i.e., the first time t1) is the first time difference T1. Similarly, since the DC drive voltage V DD Gradually increases, causing the voltage of the second light-emitting diode module to reach the recognition voltage V IDEN When, therefore, starting from the starting reference time t0 until the voltage of the second light-emitting diode module reaches the recognition voltage V IDEN The time difference between this time (i.e., the second time t2) is the second time difference T2. And so on, since the DC drive voltage V DD Gradually increases, causing the voltage of the 50th light-emitting diode module LED 50 To reach the recognition voltage V IDEN When, therefore, starting from the starting reference time t0 until the voltage of the 50th light-emitting diode module LED 50 To reach the recognition voltage V IDEN The time difference between this time (i.e., the 50th time t 50 ) is the 50th time difference T 50 .

[0054] In summary, the starting reference time t0 can be obtained (by turning off the switch to overlap the relative voltage waveforms of all light-emitting diode modules, the time point can be set (defined) as the starting reference time t0, and the time length (time width) when the voltage of each light-emitting diode module reaches the recognition voltage V IDEN Can be calculated (recorded) and known. Therefore, the time differences T1 to T of all light-emitting diode modules can be obtained 50 .

[0055] Furthermore, the magnitudes of the generated time differences are compared with a plurality of time difference ranges to determine the order of each of the light-emitting diode modules. Specifically, the identification and determination of the order are achieved by establishing a lookup table in each light-emitting diode module. For example, the circuit designer can pre-establish the lookup table according to the magnitude of the time difference (range) corresponding to the order of the light-emitting diode modules to achieve the ordering of each of the light-emitting diode modules.

[0056] As shown below, it is an implementation manner of the lookup table, where 50 light-emitting diode modules are taken as an example for illustration (which is also suitable for Figure 9 The number of light-emitting diode modules L001 to L100 shown is 100). Lamp sequence Time difference (microseconds (μs)) #1 6～8 #2 8～10 #3 10～12 #4 12～14 #5 14～16 #6 16～18 … … #50 104～106

[0057] Thus, after each LED module operates, based on the obtained time difference and corresponding to the lighting sequence in the built-in look-up table, the lighting sequence of each LED module can be obtained. For example, when the time difference obtained by a certain LED module is 12.95 microseconds, according to the built-in look-up table of this LED module, it corresponds to the 4th LED module. Or, when the time difference obtained by a certain LED module is 17.08 microseconds, according to the built-in look-up table of this LED module, it corresponds to the 6th LED module. And so on, which will not be elaborated here. Thus, based on each of the time differences, the order of each of the LED modules is determined to achieve the function of serial automatic sequencing.

[0058] Therefore, for an LED string in a series structure, automatic coding can be performed using a plurality of time differences. In this way, based on the complete position information of each of the LED modules 202 captured by the image acquisition unit 101, automatic coding can be carried out to assign an order to each LED module 202.

[0059] As Figure 6 shown, the two-pin lamp is in a parallel structure (that is, each of the LED modules 202 forms an LED string with a parallel connection architecture). In this coding process, each LED module is in a low-current and high-impedance state. A constant-current device at the end of the circuit supplies a large current, or the controller enters a constant-current mode. Different voltages of each LED module are obtained through a line resistance or an additional small resistance to distinguish the order, so as to achieve automatic coding, which is described in detail as follows.

[0060] With reference to Figure 3 shown, it is a flowchart of the parallel automatic sequencing of the present invention. For an LED string in a parallel structure, in the present invention, automatic coding is performed by making the voltages generated on each LED module different through a power supply, a line resistance, and an impedance element, including step S401: connecting a plurality of LED modules in parallel through a power line having a plurality of line resistances, and each LED module includes an impedance element that can provide impedance characteristics; step S402: the parallel-connected LED modules receive the power supply; and step S403: the power supply passes through the line resistance and the impedance element to make the voltages generated on each LED module different, and codes the LED modules.

[0061] Specifically, please refer to Figure 11A, which is the circuit diagram of the first embodiment of the parallel sequencing light-emitting diode string powered by the constant voltage source of the present invention. The parallel sequencing light-emitting diode string includes a plurality (N) of light-emitting diode modules 11, 12, …, 1N. Each of the light-emitting diode modules 11, 12, …, 1N is connected in parallel through a power line 100. For the actual circuit, there is a line resistance in the power line 100, so the power line 100 has a plurality of line resistances R L1 , R L2 , …, R LN , R L1’ , R L2’ , …, R LN’ . Each of the light-emitting diode modules 11, 12, …, 1N includes a resistor R1, R2, …, R N , and parasitic capacitors C1, C2, …, C N that can be equivalently connected in parallel with the corresponding resistors R1, R2, …, R N . As Figure 11A shown, each of the light-emitting diode modules 11, 12, …, 1N connected in parallel receives a power supply Vdc. In this embodiment, the power supply Vdc is a constant voltage source, which is used to provide a voltage source with a fixed voltage magnitude. The power supply Vdc passes through each of the line resistances R L1 , R L2 , …, R LN , R L1’ , R L2’ , …, R LN’ and each of the resistors R1, R2, …, R N in each of the light-emitting diode modules 11, 12, …, 1N, so that the voltage magnitudes generated on each of the light-emitting diode modules 11, 12, …, 1N are different.

[0062] When power is applied, the power supply Vdc supplies power to each of the light-emitting diode modules 11, 12, …, 1N. Due to the voltage difference caused by the current flowing through each of the line resistances R L1 , R L2 , …, R LN , for this embodiment, the voltage difference caused by the power supply Vdc of the constant voltage source passing through each of the line resistances R L1 , R L2 , …, R LN is the voltage drop. Therefore, the voltage magnitudes generated on each of the light-emitting diode modules 11, 12, …, 1N are different. Cooperating with Figure 11EAs shown, it is a voltage schematic diagram of the first embodiment of the light-emitting diode lamp string in parallel sequencing according to the present invention. A first voltage V1 on the first light-emitting diode module 11 is greater than a second voltage V2 on the second light-emitting diode module 12, the second voltage V2 is greater than a third voltage V3 on the third light-emitting diode module 13, and so on. That is to say, the voltage generated by the front (upstream) light-emitting diode module is greater than the voltage generated by the rear (downstream) light-emitting diode module (V1 > V2 >... > V N ). Thus, according to the magnitudes of the generated voltages V1, V2,..., V N , the light-emitting diode modules 11, 12,..., 1N are sequenced.

[0063] In one embodiment, it can be implemented by building a corresponding lookup table. For example, the circuit designer can, according to the magnitude of the power supply Vdc, the number of the light-emitting diode modules 11, 12,..., 1N, the (estimated) magnitudes of the line resistances R L1 , R L2 ,..., R LN , and the magnitudes of the resistors R1, R2,..., R N , pre-establish the lookup table for the correspondence of the generated voltages V1, V2,..., V N to achieve the sequencing of the light-emitting diode modules 11, 12,..., 1N.

[0064] As shown below, it is an implementation manner of the lookup table, which is illustrated by taking 100 light-emitting diode modules 11, 12,..., 1N as an example. Lamp sequence Voltage range (volts) #1 5.10～4.90 #2 4.90～4.70 #3 4.70～4.54 #4 4.54～4.38 #5 4.38～4.26 #6 4.26～4.14 … … #100 2.36～2.32

[0065] For example, when the voltage obtained by a certain light-emitting diode module (such as the first light-emitting diode module 11), e.g., the first voltage V1, is 5.00 volts, since this voltage lies within the voltage range (5.10 - 4.90 volts) of the first lamp sequence (#1), the light-emitting diode module can be sequenced as the first light-emitting diode module 11. Similarly, when the voltage obtained by a certain light-emitting diode module (such as the second light-emitting diode module 12), e.g., the second voltage V2, is 4.80 volts, since this voltage lies within the voltage range (4.90 - 4.70 volts) of the second lamp sequence (#2), the light-emitting diode module can be sequenced as the second light-emitting diode module 12. Similarly, when the voltage obtained by a certain light-emitting diode module (such as the sixth light-emitting diode module 16), e.g., the sixth voltage V6, is 4.20 volts, since this voltage lies within the voltage range (4.26 - 4.14 volts) of the sixth lamp sequence (#6), the light-emitting diode module can be sequenced as the sixth light-emitting diode module 16.

[0066] Please refer to Figure 11B as shown, which is the circuit diagram of the first embodiment of the parallel-sequenced light-emitting diode lamp string powered by a constant current source according to the present invention. In addition to implementing the power supply Vdc in the form of a constant voltage source, the present invention can also be implemented in the form of a constant current source, that is, in this embodiment, the power supply Idc is a constant current source, which is used to provide a current source with a fixed current magnitude. The power supply can be any form of DC power supply such as a constant voltage source, a constant current source, a pulse power supply, a carrier power supply, etc.

[0067] When powered on, the power supply Idc supplies power to each of the light-emitting diode modules 11, 12,..., 1N. Due to the voltage differences caused by the current flowing through each line resistance R L1 , R L2 ,..., R LN , for this embodiment, the voltage differences caused by the constant current source power supply Idc passing through each line resistance R L1 , R L2 ,..., R LN are voltage rises. Therefore, the voltage magnitudes generated on each of the light-emitting diode modules 11, 12,..., 1N are different. With reference to Figure 11F as shown, which is the voltage schematic diagram of the second embodiment of the parallel-sequenced light-emitting diode lamp string according to the present invention, a first voltage V1 on the first light-emitting diode module 11 is less than a second voltage V2 on the second light-emitting diode module 12, this second voltage V2 is less than a third voltage V3 on the third light-emitting diode module 13,..., and so on. That is, the voltage generated by the front (upstream) light-emitting diode module is less than the voltage generated by the rear (downstream) light-emitting diode module (V1 < V2 <... < VN )。Thereby, according to the generated voltages V1, V2, …, V N with different magnitudes, the respective light-emitting diode modules 11, 12, …, 1N are sequenced. Hereinafter, the principle of sequencing for the generated voltages V1, V2, …, V N with different magnitudes and the light-emitting diode modules 11, 12, …, 1N will be described.

[0068] Please refer to Figure 11C and Figure 11D as shown, which are respectively the circuit diagram of the second embodiment of the parallel-sequenced light-emitting diode lamp string powered by the constant voltage source of the present invention and the circuit diagram of the second embodiment of the parallel-sequenced light-emitting diode lamp string powered by the constant current source of the present invention. For convenience of description, taking the Figure 11C that provides a constant voltage source as an example, and it can be applied to Figure 11D the power supply Idc that provides a constant current source, which will not be elaborated herein.

[0069] Figure 11C The greatest difference between the light-emitting diode lamp string shown in Figure 11A and the light-emitting diode lamp string shown in Figure 11C is that: Figure 11A the resistance values within each of the light-emitting diode modules 11, 12, …, 1N in the light-emitting diode lamp string of Figure 11C do not have the controllable characteristic as Figure 11A . That is, to achieve the effect of resistance compensation, Figure 11A and Figure 11B the light-emitting diode lamp string shown in

[0070] In one embodiment, both ends of the power supply setting unit 20 are coupled to the positive and negative ends of the power supply line 100, for adjusting the current of the input power supply to a constant current or the voltage of the input power supply to a constant voltage. The power supply setting unit 20 is designed to be turned on in the sequencing mode and turned off (opened) in the working mode. Therefore, in the sequencing mode, the conduction of the power supply setting unit 20 can generate a closed loop from the positive pole of the power supply, the power supply line 100, the power supply setting unit 200 to the negative pole of the power supply. In the working mode, the closed loop via the power supply setting unit 200 is no longer needed. Therefore, in the working mode, the power supply setting unit 200 is turned off, so that when the light-emitting diode modules 11, 12, …, 1N are in the working mode, the power supply setting unit 200 does not work, thus saving the power consumption of the light-emitting diode lamp string.

[0071] Please refer to Figure 11C , when powered on for the first time, because the resistors R1, R2, …, R N are in a parallel state, the equivalent resistance value is the smallest, so the current flowing through is the largest. The magnitude of the first voltage V1 corresponding to the first order (the first cycle) of the pulse signal can be obtained. When the first power-on ends, the first resistor R1 can be turned off, and the impedance of the power supply setting unit 20 can be controlled to decrease (i.e., impedance compensation of the power supply setting unit 20), so that the equivalent resistance value after parallel connection is the same, and thus the current flowing through is the same. When powered on again, the magnitude of the second voltage V2 corresponding to the second order (the second cycle) of the pulse signal can be obtained.

[0072] Similarly, when the second power-on ends, the first resistor R1 and the second resistor R2 can be both turned off, and the impedance of the power supply setting unit 20 can be controlled to further decrease, so that the equivalent resistance value after parallel connection is the same, that is, the impedance of the power supply setting unit 20 when both the first resistor R1 and the second resistor R2 are turned off is less than the impedance when only the first resistor R1 is turned off (i.e., impedance compensation of the power supply setting unit 20), and thus the current flowing through is the same. When powered on again, the magnitude of the third voltage V3 corresponding to the third order (the third cycle) of the pulse signal can be obtained. Thus, the sequence signal can be used as the basis for the sequence, and by adjusting (decreasing) the impedance of the power supply setting unit 20, the current can be maintained consistent, so that the voltage difference between any two light-emitting diode modules is maintained fixed, thereby improving the accuracy of the detected voltage identification.

[0073] Compared with Figure 11C constant-voltage power supply, Figure 11DThe impedance compensation for constant current power supply is achieved by increasing the resistance value of the power supply setting unit 20, so that the equivalent resistance value after parallel connection will increase, and thus the current flowing through can be made smaller. Thereby, the serial signal can be used as the basis for the sequence, and by adjusting (increasing) the resistance value of the power supply setting unit 20, the current can be maintained consistent, so that the voltage difference between any two light-emitting diode modules remains fixed, to improve the accuracy of the detected voltage identification.

[0074] In addition, for Figure 7 the series-parallel structure shown or Figure 8 the parallel-series structure shown of the light-emitting diode lamp string, the automatic coding can be comprehensively performed according to the aforementioned complex time differences (applicable to series connection) and by the power supply via the line resistance and the impedance element, so that the voltage magnitudes generated on each light-emitting diode module are different (applicable to parallel connection), to assign an order to each light-emitting diode module 202.

[0075] Finally, a light-emitting control program (step S40) is executed, that is: the user can operate the mobile device 10 to provide a light-emitting control signal to the control unit 201, and the control unit 201 controls the specified light-emitting diode module 202 to perform the specified light-emitting action according to the light-emitting control signal. In this light-emitting control program, the specified light-emitting diode module 202 is controlled to perform the specified light-emitting action by using the position information.

[0076] Specifically, the user can, according to the light-emitting effects to be generated by the light-emitting diode modules 202 of the light-emitting diode lamp string 20, such as continuous long lighting, color change, fast flashing, slow flashing, running lights... etc., control the specified light-emitting diode module 202. For example, the user can directly select on the touch screen in a graphical manner the light-emitting diode module 202 to be controlled for the light-emitting effect and specify its light-emitting effect. At the same time, another part of the light-emitting diode modules 202 can also be selected and their different light-emitting effects can be specified. In this way, the operation and control of the diversified light-emitting modes of the light-emitting diode lamp string 20 can be achieved.

[0077] The above-described embodiments are only preferred embodiments given to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention is subject to the claims.

Claims

1. A method for controlling a light-emitting diode lamp string, characterized in that, The LED light string includes a plurality of LED modules and a control unit. The control method includes the steps of: Executing an automatic coding program: The control unit provides a coding signal for each of the LED modules to determine its own order on the light string, so as to complete automatic coding; Executing a device connection program: Connecting a mobile device to the control unit; Executing an image positioning program: Operating an image acquisition unit of the mobile device to capture images of the positions of each of the LED modules by means of image acquisition; And Executing a light emission control program: Operating the mobile device to provide a light emission control signal to the control unit. The control unit controls the specified LED module to perform a specified light emission action according to the light emission control signal.

2. The light-emitting diode lamp string control method according to claim 1, characterized in that, In the image positioning program, according to the imaging result, a position information of the positions of each of the LED modules is generated.

3. The method for controlling a light-emitting diode lamp string according to claim 2, wherein, The position information is graphical or text data.

4. The method for controlling a light-emitting diode lamp string according to claim 3, wherein In the light emission control program, the position information is used to control the specified LED module to perform a specified light emission action.

5. The method for controlling a light-emitting diode lamp string according to claim 1, wherein Each of the LED modules forms an LED light string with a series connection structure, and the automatic coding program is a corresponding series automatic coding program.

6. The method for controlling a light-emitting diode lamp string according to claim 5, wherein In the series automatic coding program, each of the LED modules determines its own order according to different plural time differences to achieve automatic coding.

7. The method for controlling an LED light string according to claim 6, wherein: Initially, controlling the working voltage of each of the LED modules to be lower than an identification voltage to establish a starting reference time; And Controlling the working voltage of each of the LED modules to gradually rise. When it reaches the identification voltage, different time differences starting from the starting reference time are generated.

8. The method for controlling a light-emitting diode lamp string according to claim 6, characterized in that, The magnitudes of the generated time differences are compared with a range of plural time differences to determine the order of each of the LED modules.

9. The method for controlling a light-emitting diode lamp string according to claim 1, wherein Each of the LED modules forms an LED light string with a parallel connection structure, and the automatic coding program is a corresponding parallel automatic coding program.

10. The method for controlling a light-emitting diode lamp string according to claim 9, wherein In the parallel automatic coding program, each of the LED modules determines its own order according to the different magnitudes of the voltages generated by itself to achieve automatic coding.

11. The method for controlling an LED light string according to claim 10, wherein: Each of the LED modules is connected in parallel through a power supply line having a plurality of line resistances. Each of the LED modules includes an impedance element capable of providing an impedance characteristic; Each of the LED modules connected in parallel receives a power supply; And The power supply passes through each of the line resistances and each of the impedance elements, so that the voltages generated on each of the LED modules are different, and each of the LED modules is coded.

Images