CN108513393B - Light string unit, LED cascading system and data transmission method - Google Patents
Light string unit, LED cascading system and data transmission method Download PDFInfo
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
Abstract
The application discloses a light string unit, an LED cascading system and a data transmission method. The light string unit comprises a first data channel and a second data channel which are respectively used for transmitting data signals; the driving module is located in the first data channel, the through module is located in the second data channel, and the driving module drives the LED lamps according to data signals transmitted by the first data channel. The light string units adopt mutually independent data channels for redundant data transmission, so that the wiring complexity is reduced, reverse data transmission can be performed when a plurality of light string units are cascaded, and the system reliability is improved.
Description
Technical Field
The invention relates to the field of LED display, in particular to a light string unit, an LED cascading system and a data transmission method.
Background
LED (light-emitting diode) light strings are widely used in the fields of landscape and lamp illumination and display.
Fig. 1 shows a prior art LED cascade system 100, wherein a communication output port of a control terminal 101 provides a data signal for a row of cascaded light string units, one on each of opposite sides of each light string unit 102, including an input port and an output port. The input port of the first stage light string unit is connected with one communication output port of the control end 101, and then the output port of the previous stage light string unit is connected with the input port of the next stage light string unit. And each row of cascaded light string units transmits the data signals output by the output port of the control end 101 in the forward direction, so that display is realized.
When a certain level of light string units in the LED cascade system 100 fails, all the light string units at the rear level cannot receive data signals, so that a plurality of LED lamps corresponding to each light string unit at the rear level cannot work normally, and the system reliability of the LED cascade system is reduced.
To improve system reliability of the LED cascade system, each string light unit 202 in the LED cascade system 200 shown in fig. 2 includes two input ports and one output port located on different sides. And two input ports of the first-stage light string unit are respectively connected with the input port and one output port of the previous-stage light string unit. The LED cascade system 200 can solve the problem of transmission errors caused by failure of a certain level of light string units in the LED cascade system by means of redundancy transmission, but two paths of data received by a later level of light string units in the LED cascade system 200 are different, data processing is required to be performed inside the light string units, and the complexity of system wiring is increased by means of redundancy transmission.
It is desirable to further reduce the wiring complexity of the LED cascade system and to increase the reliability of the LED cascade system to enhance the display effect.
Disclosure of Invention
The invention aims to provide a light string unit and an LED cascading system which can solve the technical problems.
According to an aspect of the present invention, there is provided a light string unit including a first data channel and a second data channel for transmitting data signals, respectively; the driving module is located in the first data channel, the through module is located in the second data channel, and the driving module drives the LED lamps according to data signals transmitted by the first data channel.
Preferably, the first data channel further comprises: a first port connected to an input of the driving module and receiving the data signal; and a second port connected to an output terminal of the driving module and transmitting the data signal.
Preferably, the input end and the output end of the driving module are respectively adaptive bidirectional ports, and are automatically configured as input ends when receiving the data signals and as output ends when transmitting the data signals.
Preferably, the second data channel further comprises: the third port is connected to the input end of the through module; and a fourth port connected to an output of the pass-through module.
Preferably, the pass-through module directly forwards the data signal.
According to another aspect of the present invention, there is provided an LED cascade system, the LED cascade system comprising a control terminal; and a plurality of light string units comprising: a first data channel and a second data channel for transmitting data signals, respectively; the driving module is located in the first data channel, the through module is located in the second data channel, the plurality of light string units receive the data signals from the control end and transmit the data signals in a forward cascade mode, the first data channel of the ith light string unit is connected with the second data channel of the (i+1) th light string unit, the second data channel of the ith light string unit is connected with the first data channel of the (i+1) th light string unit, and the driving module drives the plurality of LED lamps according to the data signals transmitted by the first data channel, wherein i is an integer greater than or equal to 1.
Preferably, a first stage light string unit of the plurality of light string units is connected with the control terminal so as to obtain two parallel data signals.
Preferably, the first data channel and the second data channel of a last stage light string unit of the plurality of light string units form a loop, so that the data signal is reversely transmitted from the last stage light string unit.
Preferably, the first data channel of the i-th level light string unit is identical to the second data channel distribution of the i+1-th level light string unit, and the second data channel of the i-th level light string unit is identical to the first data channel distribution of the i+1-th level light string unit.
Preferably, the first data channel of the i-th level light string unit is identical to the first data channel distribution of the i+1-th level light string unit, and the second data channel of the i-th level light string unit is identical to the second data channel distribution of the i+1-th level light string unit.
Preferably, the first data channel includes a first port connected to an input of the driving module and receiving the data signal; and a second port connected to an output terminal of the driving module and transmitting the data signal.
Preferably, the input end and the output end of the driving module are respectively adaptive bidirectional ports, and are automatically configured as input ends when receiving the data signals and as output ends when transmitting the data signals.
Preferably, the second data channel includes: the third port is connected to the input end of the through module; and a fourth port connected to an output of the pass-through module.
Preferably, the pass-through module directly forwards the data signal.
Preferably, the LED cascade system is one selected from the group consisting of an LED lighting system and an LED display system.
According to another aspect of the present invention, there is provided a data transmission method applied to the above LED cascade system, including: the control end outputs two paths of parallel data signals to the LED cascade system; and the first path of data signal is used for transmitting the data signal to the LED cascade system in the forward direction through the first data channel of the first-stage light string unit of the LED cascade system, the second path of data signal is used for transmitting the data signal to the LED cascade system in the forward direction through the second data channel of the first-stage light string unit of the LED cascade system, and when the transmission of the first path of data signal or the second path of data signal is interrupted, the other path of data signal is used for transmitting the data signal in the reverse direction from the last-stage light string unit.
The light string unit adopts two independent data channels to carry out redundant data transmission, and the communication ports arranged on the two opposite sides of the data channels are symmetrically designed, so that the wiring complexity is reduced. The multiple light string units are cascaded to form a loop, so that the LED cascading system can perform reverse data transmission, the data transmission is more flexible, and the system reliability and the LED display effect are improved.
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The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 shows a schematic diagram of a prior art LED cascade system;
FIG. 2 shows a schematic diagram of another prior art LED cascade system;
FIG. 3 is a schematic view showing an internal structure of the light string unit of the present invention;
FIG. 4 shows a schematic diagram of the structure of the LED cascade system of the present invention;
fig. 5 shows a schematic structural diagram of a first embodiment of the LED cascade system of the invention.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings. Like elements are denoted by like reference numerals throughout the various figures. For clarity, the various elements in the figures are not drawn to scale. Furthermore, some well-known portions may not be shown.
Numerous specific details of the invention are set forth in the following description in order to provide a thorough understanding of the invention. However, as will be understood by those skilled in the art, the present invention may be practiced without these specific details.
The invention may be presented in a variety of forms, some of which are described below.
Fig. 3 is a schematic view showing an internal structure of the light string unit of the present invention. The light string unit 20 includes a first data channel and a second data channel, which are independent of each other, for transmitting data signals.
The driving module 21 is located on the first data channel, the first port a of the light string unit 20 is connected to one port of the driving module 21, receives data signals and drives the plurality of LED lamps 22 connected to the driving module 21, and the second port B of the light string unit 20 is connected to the other port of the driving module 21, and outputs the remaining data signals.
The pass-through module 22 is located on a second data channel, the third port C of the string unit 20 is connected to one port of the pass-through module 22, the fourth port D of the string unit 20 is connected to the other port of the pass-through module 22, and the second data channel forwards data signals via the pass-through module 22.
It should be noted that, the driving module 21 includes a shift register, a storage module, a reading module, a data processing module, etc., and the specific working principle of the driving module 21 is well known to those skilled in the art, and will not be described herein. The input end and the output end of the driving module 21 are, for example, adaptive bidirectional ports, and when the input end or the output end of the driving module 21 sends a data signal, the ports are automatically matched to be output ports; when the input or output of the drive module 21 receives a data signal, the port automatically matches to the input port.
The first port a and the third port C of the light string unit 20 are located at one side of the light string unit, and the second port B and the fourth port D are located at the other side of the light string unit in the present invention, but the implementation of the light string unit is not limited thereto, and the first port a and the fourth port D of the light string unit are located at one side of the light string unit, and the second port B and the third port C are located at the other side of the light string unit. In fig. 3, i is a schematic diagram of the internal structure of a light string unit, and in fig. 3, ii is a schematic diagram of the internal structure of a light string unit in which two data channels are rotated 180 °, the input and output ends of a driving module 21 connected to a first port a and a second port B are adaptive bi-directional ports, and a pass-through module 22 connected to a third port C and a fourth port D in the light string unit is used for forwarding data signals, so that in practical application, the two data channels in the light string unit provided by the present invention are rotated 180 ° and still can work normally.
The light string units adopt the independent data channels to carry out redundant data transmission, so that the wiring complexity of the light string units is reduced, the port symmetry design of each circuit data channel realizes the bidirectional transmission of data signals in the light string units, and further, when a plurality of light string units are cascaded, the data signals can be reversely transmitted, thereby improving the reliability of the system.
Fig. 4 shows a schematic structural diagram of the LED cascade system of the invention.
As shown in fig. 4, the LED cascade system 300 includes a control terminal 301 and a plurality of rows of cascaded light string units 302, each light string unit 302 driving a plurality of LED lights, for example, the light string units described above.
A first data channel of a first-stage light string unit in one row of cascaded light string units receives a first path of data signal output by the control end 301, transmits the first path of data signal to the current-stage driving module to drive the current-stage plurality of LED lamps, and transmits the residual data signal to a second data channel of a second-stage light string unit through the first data channel; the second data channel of the first-stage light string unit receives the second data signal output by the control end 301, and transmits the second data signal to the first data channel of the second-stage light string unit through the present-stage pass-through module.
The second data channel of the second-stage light string unit receives the rest first-path data signals and transmits the rest first-path data signals to the first data channel of the next-stage light string unit through the current-stage direct connection module; the first data channel of the second-stage light string unit receives a second path of data signals, transmits the second path of data signals to the driving module of the present stage to drive the LED lamps of the present stage, and transmits the remaining second path of data signals to the second data channel of the next-stage light string unit.
And the first data channel of the (i+1) th-stage light string unit is connected with the second data channel of the (i) th-stage light string unit, the second data channel of the (i+1) th-stage light string unit is connected with the first data channel of the (i) th-stage light string unit, the driving modules of the plurality of light string units drive the LED lamps of the stage according to the received data signals until the last-stage light string unit, and the first data channel and the second data channel of the last-stage light string unit 10 form a loop. Wherein i is an integer of 1 or more.
It should be noted that, two paths of data channels of the first-stage light string unit are connected with the control end to obtain two paths of parallel data signals. The first data channel of the light string unit receives data signals and needs to be processed through a shift register in the light string unit, data for driving the light string unit at the current stage is transmitted to the driving module, the driving module drives the LED lamps at the current stage according to the data signals and transmits residual data signals to the second data channel of the light string unit at the next stage, and the second data channel of the light string unit receives the data signals and does not need to be processed, so that the data signals are directly transmitted to the first data channel of the light string unit at the next stage.
In one row of cascaded light string units, a first-stage light string unit receives two paths of parallel data signals output by a control end, a first data channel of the first-stage light string unit receives a first path of data signals output by the control end, a plurality of LED lamps of odd-numbered stages, which are started by a plurality of LED lamps corresponding to the first-stage light string unit, are driven according to a loop of an LED cascading system, then the LED lamps of even-numbered stages are driven by reversely transmitting data signals from a last-stage light string unit until the LED lamps corresponding to a second-stage light string unit, and when the first path of data signals are transmitted to the corresponding light string units with errors of a driving module, the transmission of the first path of data signals is terminated. The second data channel of the first-stage light string unit receives a second path of data signals output by the control end, a plurality of LED lamps of even stages, which are started by the LED lamps corresponding to the second-stage light string unit, are driven according to a loop of the LED cascading system, then the data signals are reversely transmitted from the last-stage light string unit to drive the LED lamps of odd stages until the LED lamps corresponding to the first-stage light string unit, and when the second path of data signals are transmitted to the corresponding light string unit with errors of the driving module, the second path of data signal transmission is terminated.
At this time, except that a plurality of LED lamps corresponding to the faulty lamp string units in one row of cascaded lamp string units cannot work normally, the other lamp string units at all levels can work normally, so that the reliability of the system is enhanced, redundant data transmission is performed through mutually independent data channels, and the wiring complexity is reduced.
Only the principle that when the driving circuit of one stage of light string unit in the LED cascade system is in error, the other stages of light string units work normally is described in detail. However, when the driving modules of the lamp string units of the adjacent two stages or even the even or odd stages are wrong, the lamp string units of the other stages can still work normally, and the specific working principle is similar to that of the driving modules of the lamp string units of the first stage when the driving modules are wrong, and is not repeated here.
Fig. 5 shows a schematic structural diagram of a first embodiment of the LED cascade system of the invention.
Fig. 5 is a schematic diagram showing a specific connection mode of the LED cascade system according to the present invention. The LED cascade system 400 includes a control end 301 and a plurality of light string units 20, where the plurality of light string units 20 are light string units according to the present invention, and the specific internal structure is not described herein.
In a row of cascaded light string units, a first port A of a first data channel of a first-stage light string unit receives a data signal output by a control end 301, transmits the data signal to a current-stage driving module to drive a plurality of LED lamps of the current stage, and transmits the residual data signal to a fourth port D of a second data channel of a second-stage light string unit through a second port B of the first data channel; the third port C of the second data channel of the first stage light string unit receives the data signal output by the control end 301, and transmits the data signal to the second port B of the first data channel of the second stage light string unit through the present stage pass-through module.
The fourth port D of the second data channel of the second-stage light string unit receives the residual data signals, and the residual data signals are transmitted to the first port A of the first data channel of the next-stage light string unit through the current-stage direct connection module; the second port B of the first data channel of the second-stage light string unit receives the data signal, transmits the data signal to the driving module of the current stage to drive the LED lamps of the current stage, and transmits the residual data signal to the third port C of the second data channel of the next-stage light string unit through the first port A of the first data channel.
And so on, until the last stage of light string units, when a row of cascading light string units comprises an even number of light string units, the first port A of the first data channel of the last stage of light string units is connected with the third port C of the second data channel of the last stage; when a row of cascaded light string units comprises an odd number of light string units, the second port B of the first data channel of the light string unit of the last stage is connected with the fourth port D of the second data channel of the current stage.
In this embodiment, the first data channel of the i-th level light string unit and the second data channel of the i+1th level light string unit are distributed in the same position, and the second data channel of the i-th level light string unit and the first data channel of the i+1th level light string unit are distributed in the same position.
It should be noted that, the implementation of the LED cascade system in the present invention is not limited to the above embodiment, and more specifically, the first data channel of the i-th stage light string unit and the first data channel of the i+1th stage light string unit are distributed in the same position, and the second data channel of the i-th stage light string unit and the second data channel of the i+1th stage light string unit are distributed in the same position.
According to the data transmission method applied to the LED cascade system, the control end outputs two parallel data signals to the LED cascade system, the first data signal is transmitted to the LED cascade system in the forward direction through the first data channel of the first-stage light string unit of the LED cascade system, and the second data signal is transmitted to the LED cascade system in the forward direction through the second data channel of the first-stage light string unit of the LED cascade system. When the first path of data signal or the second path of data signal is interrupted, the other path of data signal starts to reversely transmit the data signal from the last stage of light string unit. The data transmission method can ensure that the other light string units at all levels can work normally except for the wrong one-level or the corresponding LED lamps of the multi-level light string units which are not adjacent to each other in one-line cascading light string units, thereby enhancing the reliability of the system, carrying out redundant data transmission on the data channels which are independent to each other, and reducing the complexity of wiring.
It should be noted that, the foregoing description of the present embodiment is only for more clearly describing the present embodiment, and the implementation of the present invention is not limited thereto, and the odd-numbered stage light string units and the even-numbered stage light string port layouts may be interchanged. The LED cascade system in the embodiment can be any one of an LED lighting system and an LED display system, and further the lighting or display function is realized through the LEDs.
It should be noted that in this document relational terms such as one end and the other end, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Embodiments in accordance with the present invention, as described above, are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various modifications as are suited to the particular use contemplated. Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or all or part of the technical features can be replaced equivalently; such modifications and substitutions do not depart from the spirit of the invention.
Claims (26)
1. A light string unit comprising:
the first data channel comprises a first port and a second port, the second data channel comprises a third port and a fourth port, and the ports of all the data channels are symmetrical to bidirectionally transmit the data signals; and
the driving module is positioned in the first data channel, the through module is positioned in the second data channel, the driving module drives the LED lamps according to the data signals transmitted by the first data channel,
the light string units receive the data signals from the control end or the light string units connected with the control end, the light string units connected with the control end or the light string units in cascade forward transmit the data signals, a first data channel of the light string units is connected with a second data channel of the light string units connected with the light string units, the second data channel of the light string units is connected with the first data channel of the light string units connected with the light string units, and a driving module of the light string units drives a plurality of LED lamps according to the data signals transmitted by the first data channel.
2. The light string unit of claim 1, wherein a first port is connected to an input of the drive module and receives the data signal; and a second port connected to an output of the driving module and transmitting the data signal.
3. The light string unit of claim 2, wherein the input and output of the driver module are respectively adaptive bi-directional ports, automatically configured as input when receiving the data signal and automatically configured as output when transmitting the data signal.
4. The light string unit of claim 1, wherein a third port is connected to an input of the pass-through module; and a fourth port is connected to the output of the pass-through module.
5. The light string unit of claim 4, wherein the pass-through module directly forwards the data signal.
6. The light string unit of claim 1, wherein the first data channel and the second data channel of a last stage light string unit of a plurality of cascaded light string units form a loop, thereby transmitting the data signal in reverse from the last stage light string unit.
7. An LED cascade system comprising:
a control end; and
a plurality of light string units comprising:
the first data channel comprises a first port and a second port, the second data channel comprises a third port and a fourth port, and the ports of all the data channels are symmetrical to bidirectionally transmit the data signals; and
the driving module is positioned in the first data channel, the through module is positioned in the second data channel,
the LED lamp driving device comprises a control end, a plurality of lamp string units, a driving module and a first data channel, wherein the lamp string units receive the data signals from the control end and forward transmit the data signals in a cascading mode, the first data channel of the ith lamp string unit is connected with the second data channel of the (i+1) th lamp string unit, the second data channel of the ith lamp string unit is connected with the first data channel of the (i+1) th lamp string unit, and the driving module drives a plurality of LED lamps according to the data signals transmitted by the first data channel, wherein i is an integer greater than or equal to 1.
8. The LED cascade system of claim 7 wherein a first stage light string unit of the plurality of light string units is connected to the control terminal to obtain two parallel data signals.
9. The LED cascading system of claim 7, wherein the first data channel and the second data channel of a last stage light string unit of the plurality of light string units form a loop such that the data signal is transmitted in reverse from the last stage light string unit.
10. The LED cascading system of claim 7, wherein said first data channels of said i-th stage light string units are distributed identically to said second data channels of said i+1-th stage light string units, said second data channels of said i-th stage light string units being distributed identically to said first data channels of said i+1-th stage light string units.
11. The LED cascading system of claim 7, wherein said first data channel of said i-th stage light string unit is identical in distribution to said first data channel of said i+1-th stage light string unit, and said second data channel of said i-th stage light string unit is identical in distribution to said second data channel of said i+1-th stage light string unit.
12. The LED cascade system of claim 7, wherein a first port is connected to an input of the drive module and receives the data signal; and a second port connected to an output of the driving module and transmitting the data signal.
13. The LED cascading system of claim 12, wherein the input and output of the driving module are respectively adaptive bi-directional ports, automatically configured as input when receiving the data signal, and automatically configured as output when transmitting the data signal.
14. The LED cascade system of claim 7, wherein a third port is connected to an input of the pass-through module; and a fourth port is connected to the output of the pass-through module.
15. The LED cascading system of claim 14, wherein the pass-through module directly forwards the data signal.
16. The LED cascade system of claim 7, wherein the LED cascade system is one selected from the group consisting of an LED lighting system and an LED display system.
17. A data transmission method for an LED cascade system, comprising:
the control end outputs two paths of parallel data signals to a plurality of light string units of the LED cascade system, and the light string units comprise: the first data channel comprises a first port and a second port, the second data channel comprises a third port and a fourth port, and the ports of all the data channels are symmetrical to bidirectionally transmit the data signals; the driving module is positioned in the first data channel, and the through module is positioned in the second data channel; and
a first path of data signals forward transmits data signals to the LED cascade system through a first data channel of a first-stage light string unit of the LED cascade system, a second path of data signals forward transmits data signals to the LED cascade system through a second data channel of the first-stage light string unit of the LED cascade system,
when the first path of data signal or the second path of data signal is interrupted, the other path of data signal starts to reversely transmit the data signal from the last stage of light string unit, the plurality of light string units receive the data signal from the control end and forward transmit the data signal in a cascade connection manner, a first data channel of the ith stage of light string unit is connected with a second data channel of the (i+1) th stage of light string unit, the second data channel of the ith stage of light string unit is connected with the first data channel of the (i+1) th stage of light string unit, and the driving module drives a plurality of LED lamps according to the data signal transmitted by the first data channel, wherein i is an integer greater than or equal to 1.
18. The data transmission method of claim 17, wherein a first stage light string unit of the plurality of light string units is connected to the control terminal to obtain two parallel data signals.
19. The data transmission method of claim 17, wherein the first data channel and the second data channel of a last stage light string unit of the plurality of light string units form a loop, thereby transmitting the data signal in reverse from the last stage light string unit.
20. The data transmission method of claim 17, wherein the first data channel of the i-th stage light string unit is distributed identically to the second data channel of the i+1-th stage light string unit, and the second data channel of the i-th stage light string unit is distributed identically to the first data channel of the i+1-th stage light string unit.
21. The data transmission method of claim 17, wherein the first data channels of the i-th stage light string units are distributed identically to the first data channels of the i+1-th stage light string units, and the second data channels of the i-th stage light string units are distributed identically to the second data channels of the i+1-th stage light string units.
22. The data transmission method of claim 17, wherein a first port is connected to an input of the drive module and receives the data signal; and a second port connected to an output of the driving module and transmitting the data signal.
23. The data transmission method of claim 22, wherein the input and output of the driving module are respectively adaptive bi-directional ports, and are automatically configured as input when receiving the data signal and as output when transmitting the data signal.
24. The data transmission method of claim 17, wherein a third port is connected to an input of the pass-through module; and a fourth port is connected to the output of the pass-through module.
25. The data transmission method of claim 24, wherein the pass-through module directly forwards the data signal.
26. The data transmission method of claim 17, wherein the LED cascade system is one selected from the group consisting of an LED lighting system and an LED display system.
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| CN110246428A (en) * | 2019-06-19 | 2019-09-17 | 大连集思特科技有限公司 | A kind of high density transparency LED display screen and preparation method thereof |
| CN111319555B (en) * | 2020-04-10 | 2024-02-06 | 广州通达汽车电气股份有限公司 | Running water lamp control system and control method |
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