CN112188678A - LED driving chip, LED driving method and system - Google Patents
LED driving chip, LED driving method and system Download PDFInfo
- Publication number
- CN112188678A CN112188678A CN202010908110.3A CN202010908110A CN112188678A CN 112188678 A CN112188678 A CN 112188678A CN 202010908110 A CN202010908110 A CN 202010908110A CN 112188678 A CN112188678 A CN 112188678A
- Authority
- CN
- China
- Prior art keywords
- signal
- data
- circuit
- led driving
- led
- 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
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000001514 detection method Methods 0.000 claims description 10
- 238000013500 data storage Methods 0.000 claims description 9
- 230000010355 oscillation Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 12
- 238000012423 maintenance Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000004590 computer program Methods 0.000 description 5
- 238000003860 storage Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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
- H05B45/345—Current stabilisation; Maintaining constant current
-
- 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]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
Landscapes
- Led Devices (AREA)
Abstract
A data signal acquisition circuit is connected with a power signal, the data signal is modulated on the power signal in a carrier signal mode, a data code stream is generated according to the voltage amplitude change of the power signal and the duration time of the voltage amplitude change, and the data code stream comprises a first address code; the control circuit receives the data code stream, calls the flash data according to the data code stream, converts the flash data into a control signal and outputs the control signal; the driving circuit outputs a corresponding pulse signal to the LED according to the control signal so as to drive the LED to emit light according to a preset rule. According to the LED driving chip, the method and the system, a traditional four-wire transmission LED driving method is abandoned, the data signal modulated on the power signal is acquired through the data signal acquisition circuit to generate the data code stream, the control circuit calls the flashing method data according to the data code stream, and finally the driving circuit generates the pulse signal, so that the use of cables is reduced, the product failure rate is low, and the maintenance difficulty is low.
Description
Technical Field
The invention belongs to the technical field of illumination control, and particularly relates to an LED driving chip, an LED driving method and an LED driving system.
Background
At present, in a traditional LED driving method, a four-wire transmission system is connected to an LED driving chip, the four-wire transmission system respectively transmits power and data information, the power is used for supplying power to the LED driving chip, and the data information determines the flash pattern of the LED. However, the traditional LED driving method adopts four-wire transmission, which requires a large amount of cables, and has high failure rate and high maintenance difficulty.
Therefore, the conventional LED driving method has the problems that a cable needs to be used greatly due to the four-wire transmission, so that the failure rate of the product is high and the maintenance difficulty is large.
Disclosure of Invention
In view of this, embodiments of the present invention provide an LED driving chip, an LED driving method and an LED driving system, which aim to solve the problems in the conventional technical scheme that cables need to be used greatly, the failure rate of products is high, and the maintenance difficulty is large due to the adoption of four-wire transmission.
A first aspect of an embodiment of the present invention provides an LED driving chip, including:
the data signal acquisition circuit is accessed to a power signal and a data signal, the data signal is modulated on the power signal in the form of a carrier signal, the data signal acquisition circuit is used for generating a data code stream according to the voltage amplitude change of the power signal and the duration time of the voltage amplitude change, and the data code stream comprises a first address code;
the control circuit is connected with the data signal acquisition circuit and used for receiving the data code stream, calling the flash data according to the data code stream, converting the flash data into a control signal and then outputting the control signal; and
and the driving circuit is connected with the control circuit and the LED and used for outputting a corresponding pulse signal to the LED according to the control signal so as to drive the LED to emit light.
A second aspect of the embodiments of the present invention provides an LED driving method based on the above LED driving chip, including:
the method comprises the steps that a data signal acquisition circuit is adopted to access a power signal and a data signal, the data signal is modulated on the power signal in the form of a carrier signal, the data signal acquisition circuit is adopted to generate a data code stream according to the voltage amplitude change of the power signal and the duration time of the voltage amplitude change, and the data code stream comprises a first address code;
the control circuit is adopted to receive the data code stream, call the flash data according to the data code stream, convert the flash data into a control signal and output the control signal;
and outputting a corresponding pulse signal to the LED by adopting a driving circuit according to the control signal so as to drive the LED to emit light.
A third aspect of an embodiment of the present invention provides an LED driving system, including:
the power supply is used for outputting a power supply signal and a data signal, and the data signal is modulated on an initial power supply signal in the form of a carrier signal to form the power supply signal and output; and
according to the LED driving chip, the LED driving method and the LED driving system, a traditional four-wire transmission LED driving method is abandoned, the data signal modulated on the power signal is acquired through the data signal acquisition circuit, the data code stream is generated, the control circuit calls the flashing method data according to the data code stream, and finally the driving circuit generates the pulse signal, so that the use of cables is reduced, the product failure rate is low, and the maintenance difficulty is low.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a module of an LED driving chip according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an internal structure of the LED driving chip shown in fig. 1;
fig. 3 is a flowchart illustrating an embodiment of a method for driving an LED according to the present invention;
fig. 4 is a schematic structural diagram of a module of an LED driving system according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a module of an LED driving system according to another embodiment of the present invention;
FIG. 6 is a schematic diagram of the connection between the LED driving chip and the LED in the LED driving system provided in FIG. 4 or FIG. 5;
fig. 7 is another schematic diagram of connection between the LED driving chip and the LED in the LED driving system provided in fig. 4 or 5.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, a schematic diagram of a module structure of an LED driving chip 100 according to an embodiment of the present invention is shown, for convenience of description, only the parts related to the embodiment are shown, and the detailed description is as follows:
an LED driving chip 100 comprises a data signal acquisition circuit 10, a control circuit 20 and a driving circuit 30.
The data signal acquisition circuit 10 is connected to a power supply signal VCC and a data signal, the control circuit 20 is connected to the data signal acquisition circuit 10, and the driving circuit 30 is connected to the control circuit 20 and the LED.
The data signal is modulated on the power supply signal VCC in the form of a carrier signal. In particular, the data signal is the data required to provide the display image.
The data signal acquisition circuit 10 generates a data code stream according to the voltage amplitude value change of the power supply signal VCC and the duration time of the voltage amplitude value change, and the data code stream includes the first address code.
The control circuit 20 receives the data code stream, calls the flash data according to the data code stream, converts the flash data into a control signal, and outputs the control signal.
The driving circuit 30 outputs a corresponding pulse signal to the LED according to the control signal to drive the LED to emit light according to a preset rule. Specifically, the flashing data called by the control circuit 20 corresponds to the lighting rules of the LEDs.
Specifically, the control signal includes a reset signal, a start signal, a synchronization signal, an address signal, and an end signal, where the address signal is the first address code. The signal can be 1 bit or multiple bits, and in the practical application process, part of the signal can be unnecessary according to the requirement. In an alternative embodiment, the reset signal is 1 bit, the start signal is 1 bit, the sync signal is 1 bit, the address signal is 7 bits, and the end signal is 1 bit.
Specifically, the reset signal is an initial state reset signal of the LED driving chip 100, the initial signal is used to notify the LED driving chip 100 of starting to receive a signal, and the synchronization signal is used to notify the LED driving chip 100 of selecting one of the stored data or randomly selecting one of the stored data. The address signal is combined with the address setting of the LED driving chip 100 to determine whether the LED driving chip 100 needs to identify the current control signal, and the end signal is used to inform the LED driving chip 100 that the transmission of the set of control signals has ended.
Specifically, if the control signals are different, the duty ratios of the pulse signals output by the driving circuit 30 are different, and the duty ratios of the pulse signals correspond to the light emitting rules of the LEDs.
According to the LED driving chip 100 provided by this embodiment, a traditional four-wire transmission LED driving method is abandoned, a data signal modulated on a power signal VCC is collected by the data signal collecting circuit 10, a data code stream is generated, flashing data is called by the control circuit 20 according to the data code stream, and finally the driving circuit 30 generates a pulse signal, so that the use of cables is reduced, the product failure rate is low, and the maintenance difficulty is low.
Fig. 2 is a schematic diagram of an internal structure of the LED driving chip 100 shown in fig. 1, which only shows the parts related to the present embodiment for convenience of description, and the details are as follows:
in an alternative embodiment, the data signal acquiring circuit 10 includes a reference circuit 11, an oscillating circuit 12, a voltage detecting circuit 13, and a data processing circuit 14.
The reference circuit 11 is connected to the voltage detection circuit 13, the oscillation circuit 12 is connected to the data processing circuit 14, and the data processing circuit 14 is connected to the voltage detection circuit 13 and the drive circuit.
The reference circuit 11 outputs a reference voltage to the voltage detection circuit 13.
The oscillation circuit 12 generates a reference frequency. Specifically, the oscillation circuit 12 is implemented by an oscillator.
The voltage detection circuit 13 is connected to the power supply signal VCC, detects a voltage difference between the power supply signal VCC and the ground in real time, compares the voltage difference with a reference voltage, and outputs a square wave signal according to a comparison result.
The data processing circuit 14 correspondingly outputs a data code stream to the control circuit 20 according to the duration of the high level and the low level in the square wave signal.
Specifically, the voltage detection circuit 13 is connected to the power supply signal VCC through a power supply interface, compares the voltage difference between the power supply interface and the ground terminal with a reference voltage, and obtains a square wave signal according to a result to separate a data signal loaded on the power supply signal VCC.
The amplitude change and the duration of the power supply signal VCC are identified, so that the data signal is decoded and separated from the power supply signal VCC, the dependence of the data signal on the voltage of the power supply signal VCC can be reduced, the transmission distance is increased, and the signal identification rate is maintained.
In an alternative embodiment, control circuit 20 includes address circuit 21, data storage circuit 22, and logic control circuit 23.
The logic control circuit 23 is connected to the address circuit 21, the data storage circuit 22, and the drive circuit 30.
The address circuit 21 stores address information of the LED driving chip 100 and outputs a corresponding second address code. Specifically, the address information of each LED driving chip 100 is different, and the corresponding second address code is also different.
The data storage circuit 22 stores a plurality of flash data.
The logic control circuit 23 compares the first address code with the second address code, and when the first address code matches the second address code, the logic control circuit calls the flash data according to the data code stream, converts the flash data into a control signal, and outputs the control signal.
Specifically, the logic control circuit 23 compares the first address code with the second address code, and when the first address code and the second address code are matched, it indicates that the data code stream needs to be processed by the LED driving chip 100; when the two are not matched, the data code stream belongs to other LED driving chips 100. The data storage circuit 22 stores the second address code, so that accurate matching is realized, control signals of the LED driving chips 100 of other addresses are prevented from being processed by one LED driving chip 100 by mistake, and the accuracy is high.
Specifically, the data storage circuit 22 stores a plurality of flash data, and the LED driving chip 100 does not need to additionally receive the flash data, and only needs to correspondingly call the flash data stored in the data storage circuit 22 according to the data code stream, so that the number of external modules is reduced, and the LED driving chip is convenient and practical.
In an alternative embodiment, the LED driving chip 100 further includes a power-off holding circuit 40.
The power-off holding circuit 40 is connected to the data signal acquisition circuit 10.
The power-off maintaining circuit 40 transmits the accessed power signal VCC to the data signal acquisition circuit 10, and controls the data signal acquisition circuit 10 to maintain operation within a preset time when the power signal VCC stops being received.
By adding the power-off maintaining circuit 40, it is ensured that when the power signal VCC is suddenly terminated and input to the LED driving chip 100, the LED driving chip 100 is not powered off instantaneously, so that the current state of the chip can be maintained within the preset time.
In an alternative embodiment, the LED driving chip 100 further includes a constant current circuit 50.
The constant current circuit 50 is connected to the drive circuit 30.
The constant current circuit 50 outputs a constant current control signal to the driving circuit 30 to control the driving circuit 30 to perform constant current output.
By adding the constant current circuit 50, the current output to the LED is prevented from changing too much when the voltage of the power supply signal VCC changes greatly, so that the LED is prevented from being damaged.
In an alternative embodiment, the LED driving chip 100 further includes a compensation circuit 60.
The compensation circuit 60 dynamically detects the power supply signal VCC and outputs a compensation current accordingly. Specifically, the compensation circuit 60 dynamically detects the voltage of the power supply signal VCC, and accordingly generates a compensation current of a certain magnitude according to the voltage of the power supply signal VCC and the change of the current output to the LED, so that the voltage difference value of the LED driving chip 100 tends to be stable.
In the LED driving chip 100 provided in this embodiment, the reference circuit 11 outputs a reference voltage to the voltage detection circuit 13, the voltage detection circuit 13 detects a voltage difference value at two ends of the LED driving chip 100 in real time, compares the voltage difference value between the power interface and the ground of the LED driving chip 100 with the reference voltage, outputs a square wave signal composed of a high level and a low level to the data processing circuit 14, and the data processing circuit 14 outputs a data code stream to the logic control circuit 23 according to the duration time of the high level and the low level in the square wave signal output by the voltage detection circuit 13. The address circuit 21 outputs a second address code to the logic control circuit 23 according to the address information stored therein, the logic control circuit 23 matches a first address code in a data code stream transmitted from the data processing circuit 14 with the second address code output by the address circuit 21, continuously reads data after the matching is confirmed, reads various flash data in the data storage circuit 22 according to a preset rule, converts the flash data into a control signal and outputs the control signal to the driving circuit 30, and the driving circuit 30 outputs pulse signals with different duty ratios according to the control signal.
The LED driving chip 100 provided in this embodiment abandons the conventional four-wire transmission LED driving method, acquires the data signal modulated on the power signal VCC through the data signal acquisition circuit 10, generates a data code stream, calls the flashing data according to the data code stream by the control circuit 20, and finally generates a pulse signal by the driving circuit 30, thereby reducing the use of cables, and achieving low product failure rate and low maintenance difficulty.
Please refer to fig. 3, which is a detailed flowchart of an LED driving method according to an embodiment of the present invention, wherein for convenience of description, only the relevant portions of the embodiment are shown, and the detailed description is as follows:
the second aspect of the present application provides an LED driving method based on the LED driving chip 100, which includes the following steps:
s01: the data code stream generating method comprises the steps that a data signal acquisition circuit 10 is adopted to access a power supply signal VCC and a data signal, the data signal is modulated on the power supply signal VCC in the form of a carrier signal, the data signal acquisition circuit 10 is adopted to generate a data code stream according to the voltage amplitude value change of the power supply signal VCC and the duration time of the voltage amplitude value change, and the data code stream contains a first address code.
S02: the control circuit 20 is used for receiving the data code stream, calling the flash data according to the data code stream, converting the flash data into a control signal and outputting the control signal.
S03: the driving circuit 30 is used to output a corresponding pulse signal to the LED according to the control signal to drive the LED to emit light.
Specifically, the control signal includes a reset signal, a start signal, a synchronization signal, an address signal and an end signal, where the address signal is the first address code.
The signal can be 1 bit or multiple bits, and in the practical application process, part of the signal can be unnecessary according to the requirement.
In an alternative embodiment, the reset signal is 1 bit, the start signal is 1 bit, the sync signal is 1 bit, the address signal is 7 bits, and the end signal is 1 bit.
The third aspect of the present application provides an LED driving system, which includes a power supply 200 and at least one LED driving chip 100 described above.
The power supply 200 is connected to the LED driving chip 100.
The power supply 200 outputs a power signal and a data signal, the data signal being modulated on the original power signal in the form of a carrier signal to form the power signal and output
Optionally, the power supply 200 includes a signal source 201 and a main control circuit 202.
The signal source 201 is connected to the main control circuit 202, and the main control circuit 202 is connected to the LED driving chip 100. Specifically, the main control circuit 202 is connected to the data signal acquisition circuit 10 of the LED driving chip 100.
The signal source 201 outputs an initial power signal to the main control circuit 202.
The master control circuit 202 modulates the data signal on the initial power signal in the form of a carrier signal to form and output the power signal VCC. The LED driving chip 100 is connected to the main control circuit 202, and is configured to receive and process a power supply signal VCC.
Optionally, the main control circuit 202 includes a controller and a voltage adjusting circuit.
The controller is used for outputting a modulation command to the voltage adjusting circuit.
The voltage adjusting circuit is connected to the signal source 201 and the controller.
The voltage adjusting circuit correspondingly modulates the data signal on the initial power signal in the form of a carrier signal according to the modulation command to form a power signal VCC and output the power signal VCC to the LED driving chip 100.
Optionally, the controller is implemented by a single chip, a processor or a microcontroller. The voltage adjustment circuit modulates the modulation command and outputs a power supply signal VCC consisting of a high level and a low level.
Specifically, the high level of the power supply signal VCC is VDD, the low level is VSS (ground) or 0, and when the low level is 0, the signal source 201 is in an off state; the low level may be a set value VSD between VDD and VSS, where VSD is α VDD and 0 ≦ α < 1. When the low level is VSS or 0, the logic processing circuit of the LED driving chip 100 and the voltage detecting circuit 13 are not reset due to the power-off holding circuit 40, so that the LED driving chip 100 can keep the current state, and can continue to operate when the voltage adjusting circuit outputs the high level again.
Optionally, the LED driving system further includes at least one LED connected to the LED driving chip 100, where the LED is configured to emit light according to the pulse signal according to a preset rule.
Fig. 4 shows a form of an LED driving system in which a plurality of LEDs are combined into an LED string and a plurality of LED driving chips 100 are connected in series with each other.
Fig. 5 shows another form of the LED driving system, in which a plurality of LEDs are combined into an LED string, and a plurality of LED driving chips 100 are connected in parallel with each other.
Fig. 6 shows a driving manner of the LED by the LED driving chip 100, in which the LED driving chip 100 drives the LED by PMOS.
Fig. 7 shows a driving manner of the LED driving chip 100 for the LED, in which the LED driving chip 100 performs NMOS driving for the LED.
In summary, the present application provides an LED driving chip, an LED driving method and a system, which abandon the traditional four-wire transmission LED driving method, collect the data signal modulated on the power signal VCC through the data signal collecting circuit 10, generate the data code stream, and call the flash data according to the data code stream by the control circuit 20, and finally the driving circuit 30 generates the pulse signal, so as to reduce the use of the cable, and the product has low failure rate and low maintenance difficulty.
Various embodiments are described herein for various circuits, systems, and/or methods. Numerous specific details are set forth in order to provide a thorough understanding of the overall structure, function, manufacture, and use of the embodiments as described in the specification and illustrated in the accompanying drawings. However, it will be understood by those skilled in the art that the embodiments may be practiced without such specific details. In other instances, well-known operations, components and elements have been described in detail so as not to obscure the embodiments in the description. It will be appreciated by those of ordinary skill in the art that the embodiments herein and shown are non-limiting examples, and thus, it can be appreciated that the specific structural and functional details disclosed herein may be representative and do not necessarily limit the scope of the embodiments.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
Claims (10)
1. An LED driving chip, comprising:
the data signal acquisition circuit is accessed to a power signal and a data signal, the data signal is modulated on the power signal in the form of a carrier signal, the data signal acquisition circuit is used for generating a data code stream according to the voltage amplitude change of the power signal and the duration time of the voltage amplitude change, and the data code stream comprises a first address code;
the control circuit is connected with the data signal acquisition circuit and used for receiving the data code stream, calling the flash data according to the data code stream, converting the flash data into a control signal and then outputting the control signal; and
and the driving circuit is connected with the control circuit and the LED and used for outputting a corresponding pulse signal to the LED according to the control signal so as to drive the LED to emit light.
2. The LED driving chip of claim 1, wherein the data signal acquisition circuit comprises:
a reference circuit for outputting a reference voltage;
an oscillation circuit for generating a reference frequency;
the voltage detection circuit is connected with the reference circuit and used for accessing the power signal, detecting a voltage difference value between the power signal and the ground in real time, comparing the voltage difference value with the reference voltage and then outputting a square wave signal; and
and the data processing circuit is connected with the oscillating circuit, the voltage detection circuit and the control circuit and is used for correspondingly outputting the data code stream to the control circuit according to the duration time of the high level and the low level in the square wave signal.
3. The LED driving chip of claim 1, wherein the control circuit comprises:
the address circuit is used for storing the address information of the LED driving chip and outputting a corresponding second address code;
a data storage circuit for storing a plurality of said flash data; and
and the logic control circuit is connected with the address circuit, the data storage circuit and the drive circuit and is used for comparing the first address code with the second address code, calling the flash data according to the data code stream when the first address code is matched with the second address code, converting the flash data into a control signal and outputting the control signal.
4. The LED driving chip according to claim 1, further comprising:
and the power-off holding circuit is connected with the data signal acquisition circuit and used for transmitting the accessed power signal to the data signal acquisition circuit and controlling the data signal acquisition circuit to keep working within a preset time when the power signal is stopped being received.
5. The LED driving chip according to claim 1, further comprising:
and the constant current circuit is connected with the drive circuit and used for outputting a constant current control signal to the drive circuit so as to control the drive circuit to output a constant current.
6. The LED driving chip according to claim 1, further comprising:
and the compensation circuit is used for dynamically detecting the power supply signal and correspondingly outputting a compensation current.
7. An LED driving method based on the LED driving chip according to claim 1, wherein the method comprises:
the method comprises the steps that a data signal acquisition circuit is adopted to access a power signal and a data signal, the data signal is modulated on the power signal in the form of a carrier signal, the data signal acquisition circuit is adopted to generate a data code stream according to the voltage amplitude change of the power signal and the duration time of the voltage amplitude change, and the data code stream comprises a first address code;
the control circuit is adopted to receive the data code stream, call the flash data according to the data code stream, convert the flash data into a control signal and output the control signal;
and outputting a corresponding pulse signal to the LED by adopting a driving circuit according to the control signal so as to drive the LED to emit light.
8. An LED driving system, comprising:
the power supply is used for outputting a power supply signal and a data signal, and the data signal is modulated on an initial power supply signal in the form of a carrier signal to form the power supply signal and output; and
at least one LED driver chip as claimed in any one of claims 1 to 6, connected to said power supply.
9. The LED driving system of claim 8, wherein the power supply comprises:
the signal source is used for outputting the initial power supply signal; and
a master control circuit; the master control circuit includes:
a controller for outputting a modulation command; and
and the voltage adjusting circuit is connected with the signal source and the controller and is used for correspondingly modulating a data signal on the initial power supply signal in a carrier signal mode according to the modulation instruction so as to form a power supply signal and output the power supply signal.
10. The LED driving system according to claim 8, further comprising:
and the at least one LED is connected with the LED driving chip and is used for emitting light according to the pulse signal correspondingly according to a preset rule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010908110.3A CN112188678A (en) | 2020-09-02 | 2020-09-02 | LED driving chip, LED driving method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010908110.3A CN112188678A (en) | 2020-09-02 | 2020-09-02 | LED driving chip, LED driving method and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112188678A true CN112188678A (en) | 2021-01-05 |
Family
ID=73924074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010908110.3A Pending CN112188678A (en) | 2020-09-02 | 2020-09-02 | LED driving chip, LED driving method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112188678A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100013396A1 (en) * | 2008-07-15 | 2010-01-21 | Peng Wen-Chi | Led control system using modulated signal |
| CN103929846A (en) * | 2013-01-16 | 2014-07-16 | 硕颉科技股份有限公司 | Light-emitting diode load driving device |
| CN105163426A (en) * | 2015-08-18 | 2015-12-16 | 上海源明照明科技有限公司 | Programming setting circuit used for setting output parameters of LED driving power supply |
| CN105848339A (en) * | 2016-04-08 | 2016-08-10 | 厦门大学 | Intelligent dimming toning method and device for multi-color LED illumination light source |
| US20160374168A1 (en) * | 2013-12-09 | 2016-12-22 | Crestron Electronics, Inc. | Light emitting diode driver |
| CN107507561A (en) * | 2017-09-27 | 2017-12-22 | 宗仁科技(平潭)有限公司 | A kind of LED control chips and LED information display system |
| CN107580394A (en) * | 2017-09-28 | 2018-01-12 | 宗仁科技(平潭)有限公司 | A kind of driving chip, driving method, lighting circuit and illuminator |
| CN108463027A (en) * | 2018-02-11 | 2018-08-28 | 深圳市梓晶微科技有限公司 | A kind of LED control chips of power delivery signal |
| CN108770123A (en) * | 2018-06-15 | 2018-11-06 | 东莞市华彩威电子有限公司 | A kind of control method of full-color LED lamp band |
| US20190394848A1 (en) * | 2017-02-17 | 2019-12-26 | Hannonsis Limited | Indoor Power Line Transmission Control System |
| CN110996463A (en) * | 2019-11-25 | 2020-04-10 | 智然软件科技(深圳)有限公司 | Acousto-optic control method and control system and acousto-optic device |
-
2020
- 2020-09-02 CN CN202010908110.3A patent/CN112188678A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100013396A1 (en) * | 2008-07-15 | 2010-01-21 | Peng Wen-Chi | Led control system using modulated signal |
| CN103929846A (en) * | 2013-01-16 | 2014-07-16 | 硕颉科技股份有限公司 | Light-emitting diode load driving device |
| US20160374168A1 (en) * | 2013-12-09 | 2016-12-22 | Crestron Electronics, Inc. | Light emitting diode driver |
| CN105163426A (en) * | 2015-08-18 | 2015-12-16 | 上海源明照明科技有限公司 | Programming setting circuit used for setting output parameters of LED driving power supply |
| CN105848339A (en) * | 2016-04-08 | 2016-08-10 | 厦门大学 | Intelligent dimming toning method and device for multi-color LED illumination light source |
| US20190394848A1 (en) * | 2017-02-17 | 2019-12-26 | Hannonsis Limited | Indoor Power Line Transmission Control System |
| CN107507561A (en) * | 2017-09-27 | 2017-12-22 | 宗仁科技(平潭)有限公司 | A kind of LED control chips and LED information display system |
| CN107580394A (en) * | 2017-09-28 | 2018-01-12 | 宗仁科技(平潭)有限公司 | A kind of driving chip, driving method, lighting circuit and illuminator |
| CN108463027A (en) * | 2018-02-11 | 2018-08-28 | 深圳市梓晶微科技有限公司 | A kind of LED control chips of power delivery signal |
| CN108770123A (en) * | 2018-06-15 | 2018-11-06 | 东莞市华彩威电子有限公司 | A kind of control method of full-color LED lamp band |
| CN110996463A (en) * | 2019-11-25 | 2020-04-10 | 智然软件科技(深圳)有限公司 | Acousto-optic control method and control system and acousto-optic device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2506867C (en) | Light emitting diode lamp with synchronous pins and synchronous light emitting diode lamp string | |
| US7471048B2 (en) | Synchronous light emitting diode lamp string | |
| CA2687686A1 (en) | Optoelectronic transceiver with interface for providing flag values associated with an operating condition | |
| US8134299B2 (en) | LED control system using modulated signal | |
| US8884535B2 (en) | Light emitting diode control system using modulated signals | |
| US20170257932A1 (en) | LED Driving System with Power Transmission Path Coincided with Data Transmission Path | |
| CN110418456B (en) | Processing method for amplitude modulation type signal based on power line transmission and LED module | |
| US20130236190A1 (en) | Optical transceiver having improved functions to load control program | |
| US7576497B2 (en) | Synchronous light emitting diode lamp string | |
| CN112188678A (en) | LED driving chip, LED driving method and system | |
| CN211630454U (en) | Power carrier signal identification circuit and integrated circuit chip | |
| CN111918454B (en) | LED control chip for transmitting data through power line | |
| CN109041332B (en) | LED lamp string and control chip thereof | |
| CN111226506B (en) | Power carrier signal identification circuit, method and integrated circuit chip | |
| US10561005B1 (en) | Light emitting diode lamp string system with sequencing function and sequencing method | |
| US11211973B2 (en) | Processing method and LED module based on power line transmission amplitude-modulated signal | |
| CN111615242B (en) | Lamp, controller and lamp dimming method | |
| CN211209989U (en) | L ED control chip for power line data transmission | |
| US11152972B1 (en) | Power line communication receiver | |
| CN105451403A (en) | Brightness level control method and circuit, and segmented light adjustment illumination system | |
| EP4142168A1 (en) | Power line communication sender and receiver | |
| US20200084859A1 (en) | Light emitting diode lamp utilizing radio frequency identification signal and system for the same and address burning method for the same | |
| CN112885294A (en) | LED drive chip, drive circuit and display unit of dual signal source input | |
| CN111008161A (en) | Control method | |
| US7149908B2 (en) | Control method or unit of a data transmission apparatus controlling the electric power supplied to all of the interface sections |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210105 |
|
| RJ01 | Rejection of invention patent application after publication |