Single-wire signal correction equipment and circuit thereof

Abstract

The utility model provides single-line signal correction equipment and a circuit thereof. The single-line signal correction equipment comprises a single-pole double-throw switch, a diode A, a diode B, an adjustable resistor and a capacitor array, the single-pole double-throw switch is selected to be conducted with the diode A or the diode B, so that the rising edge or the falling edge of a control signal passes through the RC delay network, and the slope of the rising edge or the falling edge of the input control signal is changed by adjusting the resistance value of the adjustable resistor and the capacitance value output by the capacitor array; and width correction is carried out on the control signal with the changed rising edge or falling edge by combining with an automatic signal shaping module of a control chip of the lamp, so that a signal width correction function is realized, and the technical problem of signal transmission error caused by width change of an output signal after a plurality of lamps are connected in series in engineering can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of signal correction, in particular to a single-line signal correction device and a circuit thereof. Background Art

[0002] In decorative LED lamps, single bus signal LED control chips (such as DMX512, WS2811 and other control chips based on different protocols) are widely used because single bus signal transmission uses simple wiring, saves IO ports, and can realize multi-level lamp series connection.

[0003] Most LED control chips with single bus signals have an automatic signal shaping function. For such chips, the input signal high level is mostly powered by 0.7 times, and the input signal low level is powered by 0.3 times, and the data is defined by the high and low level widths. However, in engineering use, due to the actual long line length and the excessive number of lamps, signal errors may be discovered only after debugging after installation. After in-depth research and testing, it was found that one reason is that after multiple lamps are connected in series, the width of the transmitted control signal changes after automatic shaping, which is particularly serious when the line length between lamps increases. Utility Model Content

[0004] Aiming at the technical problem in the prior art that signal conduction is weakened or fails due to a change in output signal width after multiple lamps are connected in series, the utility model provides a single-line signal correction device and a circuit thereof to correct the width of the single-line signal.

[0005] A single-line signal correction circuit can be arranged between any two lamps connected in series, the lamps each comprising a control chip, the control chip comprising a signal automatic shaping module, the single-line signal correction circuit comprising a single-pole double-throw switch, a diode A, a diode B, an adjustable resistor and a capacitor array; a certain contact of the single-pole double-throw switch is electrically connected to the output end of a lamp, and a moving contact of the single-pole double-throw switch is electrically connected to the positive pole of the diode A, and the other moving contact is electrically connected to the negative pole of the diode B; one end of the adjustable resistor is electrically connected to the output end of the lamp, and the other end is respectively connected in parallel with the negative pole of the diode A and the positive pole of the diode B, and then connected in series with a capacitor array, and the other end of the capacitor array is connected to the input end of the next lamp The adjustable resistor and the capacitor array form an RC delay network, and when the single-pole double-throw switch turns on the diode A, the rising edge of the lamp output control signal passes through the RC delay network to change the rising edge slope; the falling edge of the lamp output control signal directly passes through the diode A without changing the falling edge slope; the adjusted control signal is output to the signal automatic shaping module of the next series lamp for correction; when the single-pole double-throw switch turns on the diode B, the rising edge of the lamp output control signal directly passes through the diode B without changing the rising edge slope, and the falling edge of the lamp output control signal passes through the RC delay network to change the falling edge slope; the adjusted control signal is output to the signal automatic shaping module of the next series lamp for correction.

[0006] Furthermore, the adjustable resistor is a sliding rheostat.

[0007] Furthermore, diode B is a high-speed switching diode.

[0008] Furthermore, the capacitor array includes a plurality of parallel series branches, and each of the series branches includes a switch and a capacitor connected in series.

[0009] Furthermore, the lamp also includes a plurality of LED lamp beads, and the control chip also includes a signal processing module, and the signal processing module is used to receive and decode the control signal shaped by the signal automatic shaping module, and then generate a PWM drive signal to drive the LED lamp beads to work.

[0010] The utility model also provides a single-line signal correction device, comprising a device body, wherein the device body is provided with the single-line signal correction circuit as described above.

[0011] The beneficial effects of the utility model are as follows: the utility model provides a single-line signal correction device and its circuit, which selects to conduct with diode A or diode B through a single-pole double-throw switch, so that the rising edge or falling edge of the control signal passes through the RC delay network, and by adjusting the resistance value of the adjustable resistor and the capacitance value of the capacitor array output, the slope of the rising edge or falling edge of the input control signal is changed, and then combined with the signal automatic shaping module of the control chip of the lamp, the width of the control signal with the changed rising edge or falling edge is corrected to realize the signal width correction function, which can effectively avoid the technical problem of signal transmission error caused by the change of output signal width after multiple lamps are connected in series in the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a waveform transformation diagram for control signal transmission and automatic shaping between lamps originally connected in series;

[0013] Figure 2 A schematic diagram of the circuit structure of a single-line signal correction device provided by the utility model;

[0014] Figure 3 This is a waveform transformation diagram of control signal transmission and automatic shaping between lamps in series connection using a single-line signal correction device circuit in this embodiment.

[0015] Figure ID

[0016] 1. Single-pole double-throw switch; 2. Diode A; 3. Diode B; 4. Adjustable resistor; 5. Capacitor array; 51. Capacitor; 52. Switch; 6. Lamp A; 7. Lamp B. DETAILED DESCRIPTION

[0017] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0018] refer to Figure 2 As shown, a single-line signal correction circuit can be arranged between any two lamps connected in series, each of which includes a control chip, and the control chip includes an automatic signal shaping module. In this embodiment, the single-line signal correction circuit is arranged between lamp A6 and lamp B7 connected in series.

[0019] Among them, reference Figure 1 and Figure 2 When the control signal is transmitted from lamp A6 to lamp B7 over a long distance or when the control signal is transmitted from lamp A6 to lamp B7 after passing through a large number of serially connected lamps, the control signal may be affected by various factors. Figure 2The A waveform changes to the B waveform. When the control signal of the B waveform is transmitted to the lamp B7, the signal automatic shaping module of the control chip in the lamp detects the slope of the rising edge and the falling edge of the control signal of the B waveform and shapes the control signal so that the control signal is Figure 1 The B waveform shown becomes Figure 1 However, due to signal delay and filtering during the shaping process, the signal becomes a C waveform, which is different from the original Figure 2 Compared with the A waveform, the width changes, which causes the control signal transmission to be erroneous or interrupted. Therefore, the single-line signal correction circuit is used to shape and correct the signal so that the signal is shaped from the C waveform to be consistent with the A waveform.

[0020] Specifically, the single-line signal correction circuit includes a single-pole double-throw switch 1, a diode A2, a diode B3, an adjustable resistor 4 and a capacitor array 5; a certain contact of the single-pole double-throw switch 1 is electrically connected to the output end of the lamp A6, and a moving contact of the single-pole double-throw switch 1 is electrically connected to the positive pole of the diode A, and the other moving contact is electrically connected to the negative pole of the diode B3; one end of the adjustable resistor 4 is electrically connected to the output end of the lamp A6, and the other end is respectively connected in parallel with the negative pole of the diode A2 and the positive pole of the diode B3 and then connected in series to a capacitor array 5, the other end of the capacitor array is connected to the input end of the lamp B7, and the capacitor array 5 is grounded.

[0021] Among them, the adjustable resistor 4 and the capacitor array 5 form an RC delay network, and when the single-pole double-throw switch 1 turns on the diode A6, the rising edge of the control signal output by the lamp A6 passes through the RC delay network, and the rising edge slope of the control signal controlling the lamp B7 is changed by adjusting the resistance value of the adjustable resistor 4 and the capacitance value output by the capacitor array 5; the falling edge of the control signal output by the lamp A6 directly passes through the diode A2 without changing the falling edge slope; the adjusted control signal is output to the signal automatic shaping module of the control chip of the next series lamp B7 for correction. The signal automatic shaping module forms a corrected square wave signal after shaping. When the rising edge slope becomes smaller, the square wave signal obtained by the single-line signal correction circuit and then shaped by the signal automatic shaping module is compared with the square wave signal that has not been corrected by the single-line signal correction circuit and is only shaped by the signal automatic shaping module. The high level duration is reduced and the low level duration is increased.

[0022] When the single-pole double-throw switch turns on the diode B3, the rising control signal output by the lamp A directly passes through the diode B3 without changing the rising edge slope, and the falling edge of the control signal output by the lamp A6 passes through the RC delay network, and the falling edge slope of the control signal controlling the lamp B7 is changed by adjusting the resistance value of the adjustable resistor 4 and the capacitance value output by the capacitor array 5; the adjusted control signal is output to the signal automatic shaping module of the control chip of the next series lamp B7 for correction. The signal automatic shaping module forms a corrected square wave signal after shaping. When the rising edge slope becomes smaller, the square wave signal obtained by the single-line signal correction circuit and then shaped by the signal automatic shaping module has a higher high level duration and a lower low level duration compared to the square wave signal that has not been corrected by the single-line signal correction circuit and has only been shaped by the signal automatic shaping module.

[0023] By controlling the slope of the rising and falling edges of the lamp control signal, correction is performed in combination with the signal automatic shaping module of the control chip of the next lamp B7, so that the pulse width of the control signal after the signal automatic shaping module shapes the control signal with changed slope is consistent with the pulse width of the control signal input to lamp A6.

[0024] refer to Figure 3 As shown, by changing the slope of the rising edge of the control signal to be input from lamp A6 to lamp B7, the rising edge slope becomes larger and the falling edge slope remains unchanged; Figure 3 The B waveform in the image is transformed into the B1 waveform, and then input into the signal automatic shaping module of the lamp B7 for shaping. The width of the shaped control signal does not change relative to the control signal output by the lamp A6, that is, the control signal is Figure 3 The B1 waveform is transformed into a C1 waveform that is consistent with the A waveform. In this embodiment, the capacitor array includes four capacitors, and the capacitance ratio of the four capacitors is 1:2:4:8.

[0025] In this embodiment, the adjustable resistor 4 is a sliding resistor, and the diode A2 and the diode B3 are both high-speed switching diodes.

[0026] The capacitor array 5 includes a plurality of parallel series branches, each of which includes a switch 51 and a capacitor 52 connected in series. By controlling the number of closed switches 51, multiple capacitors 51 are connected in parallel, and then combined into different capacitance values ​​and output.

[0027] By adjusting the resistance value of the sliding rheostat and coordinating the change in the capacitance value output by the capacitor array 5, the slope of the rising or falling edge of the input control signal can be changed, and then combined with the signal automatic shaping module of the control chip of lamp B, the signal that has been deformed after long-distance transmission or passing through a large number of series lamps is shaped by the automatic shaping module, and the control signal is consistent with the control signal initially input to lamp A6, thereby realizing the signal correction function.

[0028] The lamps A6 and B7 both include a plurality of LED lamp beads, and the control chip also includes a signal processing module, which is used to receive and decode the control signal shaped by the signal automatic shaping module, and then generate a PWM drive signal to drive the LED lamp beads to work.

[0029] The utility model also provides a single-line signal correction device, comprising a device body, wherein the device body is provided with the single-line signal correction circuit as described above.

[0030] The utility model provides a single-line signal correction device and a circuit thereof, which enables a single-pole double-throw switch 1 to select to be turned on with a diode A2 or a diode B3 through the high and low levels of an input electrical signal, and then changes the slope of the rising edge or the falling edge of the input control signal by adjusting the resistance value of an adjustable resistor 4 and the capacitance value output by a capacitor array 5, and combines with a signal automatic shaping module of a control chip of a lamp B7 to realize a signal correction function, which can effectively avoid the technical problem of signal conduction weakening or failure caused by changes in the output signal width after multiple lamps are connected in series.

[0031] The utility model device is particularly suitable for engineering projects where signal errors are discovered during debugging after installation, and has the advantages of simple adjustment, adjustment without power outage, and real-time observation of adjustment results without the need for other equipment.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0033] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A single-line signal correction circuit, which can be arranged between any two lamps connected in series, wherein each of the lamps comprises a control chip, wherein the control chip comprises an automatic signal shaping module, wherein: It includes a single-pole double-throw switch, a diode A, a diode B, an adjustable resistor and a capacitor array; A certain contact of the single-pole double-throw switch is electrically connected to the output end of a lamp, and a moving contact of the single-pole double-throw switch is electrically connected to the positive electrode of the diode A, and the other moving contact is electrically connected to the negative electrode of the diode B; one end of the adjustable resistor is electrically connected to the output end of the lamp, and the other end is respectively connected in parallel with the negative electrode of the diode A and the positive electrode of the diode B and then connected to a capacitor array, the other end of the capacitor array is connected to the input end of the next lamp, and the capacitor array is grounded; The adjustable resistor and the capacitor array form an RC delay network, and when the single-pole double-throw switch turns on the diode A, the rising edge of the lamp output control signal passes through the RC delay network, changing the rising edge slope; the falling edge of the lamp output control signal directly passes through the diode A without changing the falling edge slope; the adjusted control signal is output to the signal automatic shaping module of the next series lamp for correction; When the single-pole double-throw switch turns on the diode B, the rising edge of the lamp output control signal directly passes through the diode B without changing the rising edge slope, and the falling edge of the lamp output control signal passes through the RC delay network to change the falling edge slope; the adjusted control signal is output to the signal automatic shaping module of the next series lamp for correction.

2. A single-line signal correction circuit according to claim 1, characterized in that: The adjustable resistor is a sliding resistor.

3. A single-line signal correction circuit according to claim 1, characterized in that: The diode A and the diode B are both high-speed switching diodes.

4. The single-line signal correction circuit according to claim 1, characterized in that: The capacitor array includes a plurality of parallel series branches, each of which includes a switch and a capacitor connected in series.

5. The single-line signal correction circuit according to claim 1, characterized in that: The lamp also includes a plurality of LED lamp beads, and the control chip also includes a signal processing module, which is used to receive and decode the control signal shaped by the signal automatic shaping module, and then generate a PWM drive signal to drive the LED lamp beads to work.

6. A single-line signal correction device, characterized in that: The invention comprises a device body, wherein the single-line signal correction circuit as claimed in claims 1 to 5 is arranged in the device body.

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