CN112911756A - Bidirectional transmission device, LED driving device, LED control system and method - Google Patents
Bidirectional transmission device, LED driving device, LED control system and method Download PDFInfo
- Publication number
- CN112911756A CN112911756A CN202110086769.XA CN202110086769A CN112911756A CN 112911756 A CN112911756 A CN 112911756A CN 202110086769 A CN202110086769 A CN 202110086769A CN 112911756 A CN112911756 A CN 112911756A
- Authority
- CN
- China
- Prior art keywords
- led driving
- signal
- driving device
- led
- input end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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]
- H05B45/30—Driver circuits
-
- 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]
- H05B45/30—Driver circuits
- H05B45/32—Pulse-control circuits
- H05B45/325—Pulse-width modulation [PWM]
Landscapes
- Optical Communication System (AREA)
- Selective Calling Equipment (AREA)
Abstract
The invention provides a bidirectional transmission device, an LED driving device, an LED transmission driving system and a method; signals of two input ends of the bidirectional transmission device are respectively transmitted to the line selection module so as to select a transmission channel of the data processing module, and the data processing module transmits the signals to the load driving module; the circuit selection module is used for judging whether a signal of a first input end of the device is normally input or not through a watchdog unit of the circuit selection module; if the signal of the first input end changes within the preset time and the first input end of the device can input the signal, the watchdog unit controls the alternative selector to select the transmission channel corresponding to the first input end; if the signal of the first input end does not change within the preset time and the signal of the first input end cannot reach the watchdog unit, the watchdog unit controls the alternative selector to output the signal of the second input end and select the transmission channel corresponding to the second input end.
Description
Technical Field
The invention relates to the technical field of LEDs, in particular to a bidirectional transmission device, an LED driving device, an LED transmission driving system and an LED transmission driving method.
Background
In the traditional LED driving circuit, the driving data of the LEDs are transmitted by adopting a single line, the data of each stage of LED driving circuit is from the only output data, when the LED driving circuit of a certain stage is in fault, the following LED driving circuit can not receive the driving data, so that the LED lamps after the fault point can not be lightened, and the whole system can not be used. Therefore, it is necessary to optimize this circuit.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the bidirectional transmission device, the LED driving device, the LED transmission driving system and the method are provided, and after a transmission system is in a failure, the display of other points in the system cannot be damaged.
In order to solve the technical problems, the invention adopts the technical scheme that: the bidirectional transmission device comprises a first input end, a second input end, a line selection module, a data processing module and a load driving module, wherein the line selection module comprises a watchdog unit; the two-out selector is provided with a selection control end, an input end and an output end;
the first input end is connected with the watchdog unit, and the output end of the watchdog unit is connected with the selector control end; the two-choice selector is selectively connected with the first input end and the second input end through a selection control end, the output end of the two-choice selector is connected with the data processing module, and the output end of the data processing module is connected with the load driving module;
if the watchdog unit detects that the signal of the first input end changes within a preset time, the alternative selector gates the first input end and outputs the signal of the first input end;
if the watchdog unit does not detect that the signal of the first input end changes within a preset time, the alternative selector gates a second input end and outputs the signal of the second input end;
the data processing module decodes the signal of the first input end or the signal of the second input end, generates and transmits a PWM signal to the load driving module.
Furthermore, the bidirectional transmission device is also provided with a first output end and a second output end, and the data processing module alternatively outputs signals through the first output end or the second output end;
if the signal of the first input end is transmitted to the data processing module, after the data processing module shapes and regenerates the signal of the first input end, the first output end outputs the shaped and regenerated signal;
if the signal of the second input end is transmitted to the data processing module, after the data processing module shapes and regenerates the signal of the second input end, the second output end outputs the shaped and regenerated signal.
Furthermore, the bidirectional transmission device also comprises a load, and the load is connected with the output end of the load driving module; and the load driving module is used for driving the load in a constant current mode according to the PWM signal.
The invention provides an LED driving device, which applies the bidirectional transmission device; the load driving module is used for generating R, G, B signals according to the PWM signals and driving LEDs.
A third aspect of the present invention provides an LED control system comprising: a first data channel, and N LED driving devices according to the second aspect; the first data channels are distributed in the N LED driving devices, and the adjacent LED driving devices communicate the first data channels through a first input end and a first output end of the device;
wherein, the input signal of the first data channel is transmitted from the first LED driving device to the Nth LED driving device through the first data channel of the N LED driving devices;
wherein N is a positive integer.
Furthermore, the LED control system further includes second data channels, where the second data channels are distributed among the N LED driving devices, and the adjacent LED driving devices connect the second data channels through a second input end and a second output end of the device;
if the N LED driving devices detect that the input signal of the first data channel changes within a preset time, the input signal of the first data channel is transmitted from the first LED driving device to the Nth LED driving device through the first data channel of the N LED driving devices, and the N LED driving devices drive corresponding LEDs by using the input signal of the first data channel; correspondingly, the second data channel is kept connected;
if the ith LED driving device does not detect that the input signal of the first data channel changes within the preset time, sequentially communicating a second data channel from the Nth LED driving device to the LED driving device of the ith LED driving device, and transmitting the input signal of the second data channel from the Nth LED driving device to the ith LED driving device; correspondingly, a first data channel between the first LED driving device and the i-1 th LED driving device is communicated, and a first data channel between the i-1 th LED driving device and the i-1 th LED driving device is disconnected; wherein the input signal of the first data channel is transmitted from the first LED driving device to the (i-1) th LED driving device;
wherein i is a positive integer, i is greater than 1, and i is less than or equal to N.
A fourth aspect of the present invention provides an LED control method applied to the LED driving apparatus, where the LED driving apparatus is provided with a watchdog unit and an alternative selector, and the method includes:
detecting and judging whether the watchdog unit detects that the input signal of the first input end changes within a preset time;
if the watchdog unit detects that the input signal of the first input end changes within a preset time, the alternative selector transmits the input signal of the first input end to the LED;
if the watchdog unit does not detect the input signal of the first input end, the alternative selector transmits the input signal of the second input end to the LED.
Specifically, if the alternative selector transmits the input signal of the first input end to the LED, the first output end outputs a signal;
and if the alternative selector transmits the input signal of the second input end to the LED, the second output end outputs a signal.
Wherein N LED driving devices of the second aspect constitute the system of the third aspect, the method comprises:
the N LED driving devices respectively judge whether the first data channel is conducted or not, and select a data channel;
if the first data channel is conducted, the input signal of the first data channel is applied to drive an LED, and the connection of the second data channel is kept;
wherein N is a positive integer.
Further, if the first data channel of the ith LED driving apparatus is not turned on, the method further includes:
keeping receiving the input signal of the first data channel from a first LED driving device to an i-1 th LED driving device, and stopping receiving the input signal of the first data channel from an Nth LED driving device to an i-th LED driving device in sequence;
conducting a second data channel from the Nth LED driving device to the ith LED driving device;
receiving an input signal of the second data channel from the Nth LED driving device to the ith LED driving device, and driving a corresponding LED by applying the input signal of the second data channel;
wherein i is a positive integer, i is greater than 1, and i is less than or equal to N.
Among them, the bidirectional transmission apparatus of the present invention has the advantages that: the signals of two input ends of the bidirectional transmission device are respectively transmitted to the line selection module so as to select a transmission channel. The circuit selection module is used for judging whether a signal of a first input end of the device is normally input or not through a watchdog unit of the circuit selection module; if the first input end of the device inputs signals normally, the signals of the first input end can change within the preset time, the watchdog unit controls the alternative selector to select the transmission channel corresponding to the first input end; if the signal of the first input end cannot reach the watchdog unit, the signal of the first input end cannot change within the preset time, and the watchdog unit can control the alternative selector to output the signal of the second input end and select the transmission channel corresponding to the second input end. Then, the data processing module decodes the signal of the first input end or the signal of the second input end to generate a PWM signal; and finally, the load driving module drives the corresponding load according to the PWM signal.
Drawings
The specific structure of the invention is detailed below with reference to the accompanying drawings:
fig. 1 is a schematic structural diagram of a circuit selection module according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of an LED driving apparatus according to a second embodiment of the present invention;
FIG. 3 is a schematic block diagram of an information channel of an LED driving system according to a third embodiment of the present invention;
FIG. 4 is a schematic block diagram of information channel transmission in a fourth embodiment of the LED driving system of the present invention;
FIG. 5 is a schematic block diagram of a part of information channel transmission in a fifth embodiment of the LED driving system of the present invention;
FIG. 6 is a schematic block diagram of another part of information channel transmission in a fifth embodiment of the LED driving system of the present invention;
fig. 7 is a flowchart of a method for driving an LED according to a fifth embodiment of the present invention.
110-watchdog unit; 120-alternative selector; 200-a data processing module; 300-load driving module.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a circuit selection module according to a first embodiment of the present invention; in a first embodiment of the present invention, a bidirectional transmission apparatus is provided, which includes a first input terminal, a second input terminal, a line selection module, a data processing module 200, and a load driving module 300; the line selection module comprises a watchdog unit 110 and an alternative selector 120, wherein the alternative selector 120 is provided with a selection control end, an input end and an output end;
the first input end is connected to the watchdog unit 110, and the output end of the watchdog unit 110 is connected to the selector control end; the one-of-two selector 120 is selectively connected to the first input terminal and the second input terminal through a selection control terminal, an output terminal of the one-of-two selector 120 is connected to the data processing module 200, and an output terminal of the data processing module 200 is connected to the load driving module 300;
if the watchdog unit 110 detects that the signal of the first input terminal changes within a preset time, the alternative selector 120 outputs the signal of the first input terminal;
if the watchdog unit 110 does not detect that the signal of the first input terminal changes within a preset time, the alternative selector 120 outputs the signal of the second input terminal.
The alternative selector 120 transmits the signal of the first input terminal or the signal of the second input terminal to the data processing module 200, and the data processing module 200 decodes the signal of the first input terminal or the signal of the second input terminal to generate and transmit the PWM signal to the load driving module 300.
The invention has the advantages that: the signals of the two input ends of the bidirectional transmission are respectively transmitted to the line selection module so as to select a transmission channel. Wherein, the watchdog unit 110 of the line selection module is used to determine whether the signal of the first input terminal is normally input; if the first input end can input signals, the input signals of the first input end change within a preset time, and the watchdog unit 110 controls the alternative selector to select a transmission channel corresponding to the first input end; if the signal of the first input end cannot reach the watchdog unit 110, the input signal of the first input end does not change within the preset time, and the watchdog unit 110 controls the alternative selector to output the signal of the second input end and select the transmission channel corresponding to the second input end. Therefore, the data processing module can obtain the input signal of at least one input end, stable transmission is realized, and the reliability of transmission is ensured.
Wherein the first input corresponds to a default transmission channel and the second input corresponds to a spare transmission channel.
In this embodiment, the data processing module 200 is configured to decode the signal at the first input terminal or the signal at the second input terminal to generate a PWM signal; then, the load driving module 300 drives the corresponding load according to the PWM signal. The data signals of the first input end or the second input end are only distinguished by different information channels, and can be the same information or different information; the two signals have the common point that both signals can be converted into PWM signals.
It should be understood that the method of converting to the PWM signal is also called "pulse width modulation". Pulse width modulation is a method of digitally encoding the level of an analog signal. Through the use of high resolution counters, the duty cycle of the square wave is modulated to encode the level of a particular analog signal.
In an optional embodiment, the bidirectional transmission apparatus further includes a load, and the load is connected to the output end of the load driving module 300; the load driving module 300 is configured to drive the load at a constant current according to the PWM signal. The bidirectional transmission apparatus of the present embodiment is integrated with a load, and the load driving module 300 converts the PWM signal into a signal required by the load, so as to drive the load.
It should be understood that, in addition to the decoding process to generate the PWM signal in the above embodiment, the data processing module 200 also has the function of shaping and regenerating data.
In a further embodiment, the bidirectional transmission device further has a first output end and a second output end, and the data processing module 200 selectively outputs a signal through the first output end or the second output end;
if the signal of the first input end is transmitted to the data processing module 200, after the data processing module 200 shapes and regenerates the signal of the first input end of the device, the first output end outputs the shaped and regenerated signal;
if the signal of the second input end is transmitted to the data processing module 200, after the data processing module 200 shapes and regenerates the signal of the second input end, the second output end outputs the shaped and regenerated signal.
Thus, one bidirectional transmission device transmits the shaped and regenerated data to another bidirectional transmission device connected thereto through the first output terminal or the second output terminal of the device, thereby realizing a data link between the plurality of bidirectional transmission devices. Thus, data transmission between a plurality of bidirectional transmission devices can be realized.
Referring to fig. 2, fig. 2 is a schematic diagram of an LED driving device according to a second embodiment of the invention. The LED driving device is provided with two input ends and an output end, and can realize information transmission. The invention provides an LED driving device in a second aspect, which applies the bidirectional transmission device; the load driving module 300 is configured to generate R, G, B signals according to the PWM signals to drive the LEDs. The load driving module 300 in this embodiment may also be referred to as a constant current driving module or an LED driving module, and its main function is to convert the PWM signal into a stable and constant R, G, B signal, so that it can be used by the LED.
Referring to fig. 3 and 4, fig. 3 is a schematic block diagram of an information channel of an LED driving system according to a third embodiment of the present invention; fig. 4 is a schematic block diagram of information channel transmission in a fourth embodiment of the LED driving system of the present invention. A third aspect of the present invention provides an LED control system comprising: a first data channel and N LED driving devices; the first data channels are distributed in the N LED driving devices, and the adjacent LED driving devices communicate the first data channels through a first input end and a first output end of the device;
wherein, the input signal of the first data channel is transmitted from the first LED driving device to the Nth LED driving device through the first data channel of the N LED driving devices;
wherein N is a positive integer.
In a third aspect of the invention, the overall context of an LED driver is presented; under normal conditions, each LED driving device in the LED control system transmits signals through the first data channel. Wherein the first data channel is a default valid data channel.
Please also refer to fig. 3, 5 and 6; FIG. 5 is a schematic block diagram of a part of information channel transmission in a fifth embodiment of the LED driving system of the present invention; fig. 6 is a schematic block diagram of another part of information channel transmission in a fifth embodiment of the LED driving system of the present invention. The LED control system further includes second data channels, where the second data channels are distributed among the N LED driving devices, and the adjacent LED driving devices connect the second data channels through a second input end and a second output end of the device;
if the N LED driving devices detect that the input signal of the first data channel changes within a preset time, the input signal of the first data channel is transmitted from the first LED driving device to the Nth LED driving device through the first data channel of the N LED driving devices, and the N LED driving devices drive corresponding LEDs by using the input signal of the first data channel; correspondingly, the second data channel is kept connected;
if the ith LED driving device does not detect that the input signal of the first data channel changes within the preset time, sequentially communicating a second data channel from the Nth LED driving device to the LED driving device of the ith LED driving device, and transmitting the input signal of the second data channel from the Nth LED driving device to the ith LED driving device; correspondingly, a first data channel between the first LED driving device and the i-1 th LED driving device is communicated, and a first data channel between the i-1 th LED driving device and the i-1 th LED driving device is disconnected; wherein the input signal of the first data channel is transmitted from the first LED driving device to the (i-1) th LED driving device;
wherein i is a positive integer, and i is less than or equal to N.
Therefore, after the first data channel has the dead pixel, the LED driving device before the dead pixel still transmits data through the first data channel; and the LED driving device behind the dead point transmits signals through the second data channel. Therefore, the data channel is switched to ensure the normal transmission of data, and the reliability of the device is greatly improved.
The fourth aspect of the present invention provides an LED control method, applying the above LED driving apparatus, where the LED driving apparatus is provided with a watchdog unit 110 and an alternative selector 120, and the method includes:
step S100, detecting and determining whether the watchdog unit 110 detects that the input signal of the first input end changes within a preset time;
step S200, if the watchdog unit 110 does not detect that the input signal of the first input end changes within a preset time, the alternative selector 120 transmits the input signal of the first input end to an LED;
step S300, if the watchdog unit 110 does not detect that the input signal of the first input end changes within a preset time, the alternative selector 120 transmits the input signal of the second input end to the LED.
Thus, in steps S100 to S300, one LED is reliably driven after the first transmission line and the second transmission line are selected.
Referring to fig. 7, fig. 7 is a flowchart illustrating a method for driving an LED according to a fifth embodiment of the present invention. The process of transmission between a certain LED driving device and an adjacent LED driving device is explained, specifically as follows:
step S100, detecting and determining whether the watchdog unit 110 detects that the input signal of the first input end changes within a preset time;
step S210, if the watchdog unit 110 detects that the input signal of the first input end changes within a preset time, the alternative selector 120 transmits the input signal of the first input end to an LED, and the first output end outputs a signal;
step S310, if the watchdog unit 110 does not detect that the input signal of the first input end changes within a preset time, the alternative selector transmits the input signal of the second input end to the LED, and the second output end outputs a signal. By monitoring the input signal of the watchdog unit 110, the method according to the fourth aspect of the present invention performs line selection on the entire LED driving apparatus to determine the input and output of the apparatus. Therefore, when a problem occurs in a line corresponding to one input end of the LED driving device, the LED driving device can select a line corresponding to the other input end. Thereby, the reliability of the entire apparatus is improved.
Further, N LED driving devices constitute the above system, and the method includes:
s400, the N LED driving devices respectively judge whether the first data channel is conducted or not, and a data channel is selected;
step S500, if the first data channel is conducted, an input signal of the first data channel is applied to drive an LED, and the connection of the second data channel is kept; wherein N is a positive integer.
Step S400 to step S500, which describe the control method of the LED driving system, each LED driving device in the LED driving system outputs a signal through the first input terminal and the first output terminal of the device in the on state of the first data channel.
If the first data channel of the ith LED driving device is not turned on, the method further includes:
step S600, from a first LED driving device to an i-1 th LED driving device, keeping receiving the input signal of the first data channel, and from an Nth LED driving device to an i-th LED driving device, stopping receiving the input signal of the first data channel in sequence;
step S700, conducting a second data channel from the Nth LED driving device to the ith LED driving device;
step S800, receiving the input signal of the second data channel from the nth LED driving device to the ith LED driving device, and driving the corresponding LED by applying the input signal of the second data channel. Wherein i is a positive integer, i is greater than 1, and i is less than or equal to N.
Steps S600 to S800 illustrate the corresponding situation when the first data channel of the ith LED driving apparatus is not turned on. At this time, a first data channel is adopted between the first LED driving device and the (i-1) th LED driving device for data transmission, and each LED driving device between the ith LED driving device and the Nth LED driving device uses an input signal from the second data channel.
In summary, the bidirectional transmission device, the LED driving device, the LED transmission driving system and the method provided by the invention can realize bidirectional input of the LED, and have the advantages of smart circuit and high reliability.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a bidirectional transmission device, includes first input, second input, line selection module, data processing module and load drive module, its characterized in that: the circuit selection module comprises a watchdog unit and an alternative selector, wherein the alternative selector is provided with a selection control end, an input end and an output end;
the first input end is connected with the watchdog unit, and the output end of the watchdog unit is connected with the selector control end; the two-choice selector is selectively connected with the first input end and the second input end through a selection control end, the output end of the two-choice selector is connected with the data processing module, and the output end of the data processing module is connected with the load driving module;
if the watchdog unit detects that the signal of the first input end changes within a preset time, the alternative selector gates the first input end and outputs the signal of the first input end;
if the watchdog unit does not detect that the signal of the first input end changes within a preset time, the alternative selector gates a second input end and outputs the signal of the second input end;
the data processing module decodes the signal of the first input end or the signal of the second input end, generates and transmits a PWM signal to the load driving module.
2. The bidirectional transmission apparatus of claim 1, wherein: the data processing module is also provided with a first output end and a second output end, and the data processing module selectively outputs signals through the first output end or the second output end;
if the signal of the first input end of the device is transmitted to the data processing module, after the signal of the first input end of the device is shaped and regenerated by the data processing module, the shaped and regenerated signal is output by the first output end of the device;
if the signal of the second input end of the device is transmitted to the data processing module, after the data processing module shapes and regenerates the signal of the second input end of the device, the second output end of the device outputs the shaped and regenerated signal.
3. A bidirectional transmission device as recited in claim 1 or 2, wherein: the load is connected with the output end of the load driving module; and the load driving module is used for driving the load in a constant current mode according to the PWM signal.
4. An LED driving device, characterized in that: applying the bidirectional transmission apparatus of claim 3; the load driving module is used for generating R, G, B signals according to the PWM signals and driving LEDs.
5. An LED control system, comprising: a first data channel, and N LED driving devices as claimed in claim 4; the first data channels are distributed in the N LED driving devices, and the adjacent LED driving devices communicate the first data channels through a first input end and a first output end of the device;
wherein, the input signal of the first data channel is transmitted from the first LED driving device to the Nth LED driving device through the first data channel of the N LED driving devices;
wherein N is a positive integer.
6. The LED control system of claim 5, wherein: the LED driving device comprises N LED driving devices, and is characterized by further comprising second data channels, wherein the second data channels are distributed in the N LED driving devices, and the adjacent LED driving devices connect the second data channels through a second input end and a second output end of the device;
if the N LED driving devices detect that the input signal of the first data channel changes within a preset time, the input signal of the first data channel is transmitted from the first LED driving device to the Nth LED driving device through the first data channel of the N LED driving devices, and the N LED driving devices drive corresponding LEDs by using the input signal of the first data channel; correspondingly, the second data channel is kept connected;
if the ith LED driving device does not detect that the input signal of the first data channel changes within the preset time, sequentially communicating a second data channel from the Nth LED driving device to the LED driving device of the ith LED driving device, and transmitting the input signal of the second data channel from the Nth LED driving device to the ith LED driving device; correspondingly, a first data channel between the first LED driving device and the i-1 th LED driving device is communicated, and a first data channel between the i-1 th LED driving device and the i-1 th LED driving device is disconnected; wherein the input signal of the first data channel is transmitted from the first LED driving device to the (i-1) th LED driving device;
wherein i is a positive integer, i is greater than 1, and i is less than or equal to N.
7. An LED control method applied to the LED driving apparatus according to claim 4, wherein the LED driving apparatus is provided with a watchdog unit and an alternative selector, the method comprising:
detecting and judging whether the watchdog unit detects that the input signal of the first input end changes within a preset time;
if the watchdog unit detects that the input signal of the first input end changes within a preset time, the alternative selector transmits the input signal of the first input end to the LED;
if the watchdog unit does not detect that the input signal of the first input end changes within a preset time, the alternative selector transmits the input signal of the second input end to the LED.
8. The LED control method according to claim 7, wherein the method specifically comprises:
if the alternative selector transmits the input signal of the first input end to the LED, the first output end outputs a signal;
and if the alternative selector transmits the input signal of the second input end to the LED, the second output end outputs a signal.
9. The LED control method of claim 8, wherein N of said LED driving devices constitute the system of claim 6, said method comprising:
the N LED driving devices respectively judge whether the first data channel is conducted or not, and select a data channel;
if the first data channel is conducted, the input signal of the first data channel is applied to drive an LED, and the connection of the second data channel is kept;
wherein N is a positive integer.
10. The LED control method of claim 9, wherein if the first data channel of the ith LED driving device is not turned on, the method further comprises:
keeping receiving the input signal of the first data channel from a first LED driving device to an i-1 th LED driving device, and stopping receiving the input signal of the first data channel from an Nth LED driving device to an i-th LED driving device in sequence;
conducting a second data channel from the Nth LED driving device to the ith LED driving device;
receiving the input signal of the second data channel from the Nth LED driving device to the ith LED driving device, and applying the input signal of the second data channel to drive the corresponding LED;
wherein i is a positive integer, i is greater than 1, and i is less than or equal to N.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110086769.XA CN112911756A (en) | 2021-01-22 | 2021-01-22 | Bidirectional transmission device, LED driving device, LED control system and method |
| PCT/CN2021/136404 WO2022156409A1 (en) | 2021-01-22 | 2021-12-08 | Bidirectional transmission apparatus, led driving apparatus, and led control system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110086769.XA CN112911756A (en) | 2021-01-22 | 2021-01-22 | Bidirectional transmission device, LED driving device, LED control system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112911756A true CN112911756A (en) | 2021-06-04 |
Family
ID=76116807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110086769.XA Pending CN112911756A (en) | 2021-01-22 | 2021-01-22 | Bidirectional transmission device, LED driving device, LED control system and method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112911756A (en) |
| WO (1) | WO2022156409A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114241984A (en) * | 2022-02-08 | 2022-03-25 | 深圳市绿源半导体技术有限公司 | LED driving device, multistage LED driving system and driving method |
| WO2022156409A1 (en) * | 2021-01-22 | 2022-07-28 | 深圳市绿源半导体技术有限公司 | Bidirectional transmission apparatus, led driving apparatus, and led control system and method |
| CN116863878A (en) * | 2023-09-05 | 2023-10-10 | 中科(深圳)无线半导体有限公司 | Double-line transmission method of mini LED system and chip structure for implementing double-line transmission method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090284445A1 (en) * | 2008-05-15 | 2009-11-19 | Sheng-Chang Kuo | Led data input scheme with sequential scan method and cascade connection for light emitting diode (led) display system |
| CN111341247A (en) * | 2019-07-31 | 2020-06-26 | 深圳市晶泓科技有限公司 | Drive chip, LED lamp and LED display screen |
| CN111653234A (en) * | 2020-07-09 | 2020-09-11 | 深圳市绿源半导体技术有限公司 | Bidirectional transmission device, LED driving device, LED control system and bidirectional transmission method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112911756A (en) * | 2021-01-22 | 2021-06-04 | 深圳市绿源半导体技术有限公司 | Bidirectional transmission device, LED driving device, LED control system and method |
-
2021
- 2021-01-22 CN CN202110086769.XA patent/CN112911756A/en active Pending
- 2021-12-08 WO PCT/CN2021/136404 patent/WO2022156409A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090284445A1 (en) * | 2008-05-15 | 2009-11-19 | Sheng-Chang Kuo | Led data input scheme with sequential scan method and cascade connection for light emitting diode (led) display system |
| CN111341247A (en) * | 2019-07-31 | 2020-06-26 | 深圳市晶泓科技有限公司 | Drive chip, LED lamp and LED display screen |
| CN111653234A (en) * | 2020-07-09 | 2020-09-11 | 深圳市绿源半导体技术有限公司 | Bidirectional transmission device, LED driving device, LED control system and bidirectional transmission method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022156409A1 (en) * | 2021-01-22 | 2022-07-28 | 深圳市绿源半导体技术有限公司 | Bidirectional transmission apparatus, led driving apparatus, and led control system and method |
| CN114241984A (en) * | 2022-02-08 | 2022-03-25 | 深圳市绿源半导体技术有限公司 | LED driving device, multistage LED driving system and driving method |
| CN116863878A (en) * | 2023-09-05 | 2023-10-10 | 中科(深圳)无线半导体有限公司 | Double-line transmission method of mini LED system and chip structure for implementing double-line transmission method |
| CN116863878B (en) * | 2023-09-05 | 2023-12-08 | 中科(深圳)无线半导体有限公司 | Double-line transmission method of mini LED system and chip structure for implementing double-line transmission method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022156409A1 (en) | 2022-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112911756A (en) | Bidirectional transmission device, LED driving device, LED control system and method | |
| CN100531492C (en) | Led driver device | |
| CN201048032Y (en) | LED video control system | |
| JPH05219146A (en) | Intelligent interconnection and data transmission method for wide-band optical network | |
| CN111653234A (en) | Bidirectional transmission device, LED driving device, LED control system and bidirectional transmission method | |
| CN100489821C (en) | Communication system for use between electronic devices and method thereof | |
| EP3828055B1 (en) | Train control dmi data redundancy control method and system | |
| JPH0773270B2 (en) | Data communication method and multiple connection system | |
| CN101431848B (en) | Control device, automatic fault reporting system and method | |
| CN102156409B (en) | Method for controlling multi-locomotive reconnection computer of railway locomotive | |
| CN101466188A (en) | Control device, system and method for automatically reporting fault | |
| KR100815587B1 (en) | Open/short detecting arrapatus and method for led dot matrix module | |
| CN102970078B (en) | A kind of optical fiber network system and adopt this system to carry out the method for asynchronous communication transfer of data | |
| CN116156090B (en) | Display control module, expandable display device and video display splicing system | |
| CN201341253Y (en) | Control device and automatic fault reporting system | |
| CN113900397A (en) | Device for realizing reverse connection self-adaptive switching of RS-485 signal line | |
| CN113035119A (en) | LED driving device and control system of hand-held bidirectional transmission device | |
| CN212160411U (en) | Device for realizing reverse connection self-adaptive switching of RS-485 signal line | |
| CN113212445A (en) | Electronic gear shifter Hall element fault processing method and system and vehicle | |
| CN201430710Y (en) | Control device and automatic fault report system | |
| US6339805B1 (en) | Connecting process and bus interface for connecting a subassembly of a programmable controller to a bus | |
| CN114338249B (en) | Data transmission device and display system | |
| CN111016980B (en) | Air switch remote monitoring system and method | |
| CN211293745U (en) | Driver controller system | |
| CN117477776A (en) | Method and system for switching communication links between power grid load terminal and electric energy meter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |