CN112652265B

CN112652265B - LED driving device

Info

Publication number: CN112652265B
Application number: CN202011556171.4A
Authority: CN
Inventors: 蔡荣怀; 张丹丹; 陈孟邦; 卢玉玲; 邹云根; 雷先再
Original assignee: Zongren Technology Pingtan Co ltd
Current assignee: Fengyuan Technology Pingtan Co ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2022-09-16
Anticipated expiration: 2040-12-24
Also published as: CN112652265A

Abstract

The invention provides an LED driving device, which comprises a control module and a plurality of LED units, wherein the plurality of LED units are connected in parallel at a power supply end and a signal end of the control module through a power supply bus and a signal bus, each LED unit receives a data signal transmitted by the signal bus of the control module and counts a plurality of groups of received data signals, the numerical value is added by 1 when one group of data signals are received, the counted value is compared with the number of prestored address codes, when the numerical values of the two are matched, the data signals of the current group are obtained, the corresponding brightness or color temperature is displayed, each LED unit works independently, the influence of other LED units is avoided, and the reliability of the LED units is improved.

Description

LED driving device

Technical Field

The invention belongs to the technical field of LEDs, and particularly relates to an LED driving device.

Background

In the LED cascade system, each LED unit receives a signal of a previous stage, processes the signal and then transmits the processed signal to a next stage; at present, the signal transmission mode of the application is that signals are transmitted in series, and in the transmission mode, the signals are transmitted to a next chip from a previous chip, if the previous chip has a problem, the subsequent chip can not receive normal signals, and the system reliability is poor; the method for improving the reliability of signal transmission in the prior market is characterized in that each chip is provided with two paths of signal inputs which are respectively connected with the previous chip and the previous two chips, so that the subsequent chips can correctly receive signals as long as the previous two chips do not have problems simultaneously, and the reliability of the system is greatly improved.

Disclosure of Invention

The invention aims to provide an LED driving device, and aims to solve the problems of low reliability and high cost of the traditional LED driving device.

A first aspect of an embodiment of the present invention provides an LED driving apparatus, including a control module and a plurality of LED units;

the plurality of LED units are connected in parallel at a power supply end and a signal end of the control module through a power bus and a signal bus;

the control module is used for outputting a working power supply to each LED unit through a power bus and outputting a control signal to each LED unit through a data bus, wherein the control signal of each frame comprises a plurality of groups of data signals;

each of the LED units is configured to:

according to the power-on starting of the working power supply, the plurality of groups of data signals are counted, and when the counted value is matched with the number of the pre-stored address codes, the data signals of the current group are obtained; and

and displaying the corresponding brightness or color temperature according to the data signals of the current group.

In one embodiment, the control signal further includes an end code signal, and each of the LED units maintains a previous display state until receiving the end code signal, updates display brightness or color temperature according to a received data signal after receiving the end code signal, and re-counts after receiving the end code signal.

In one embodiment, each of the LED units includes an LED driving module and at least one LED lamp;

one end of at least one LED lamp is connected in parallel and is connected with the power bus, the other end of the at least one LED lamp is respectively connected with at least one signal end of the LED driving module one by one, and the LED driving module is also connected with the power bus and the signal bus;

the LED driving module is used for outputting a pulse signal with a duty ratio corresponding to the current group of the data signals to each LED lamp.

In one embodiment, the LED driving module is an LED driving chip.

In one embodiment, the LED driving module includes a data processing unit and an output driving unit;

the data processing unit is used for counting the multiple groups of data signals of each frame, comparing the multiple groups of data signals with the number of prestored address codes, and outputting corresponding gray data signals to the output driving unit according to the matched data signals;

and the output driving unit is used for outputting pulse signals with duty ratios corresponding to the gray data signals to the LED lamps.

In one embodiment, the data processing unit comprises a data interface module, a data processing module, a data frame identification and counting module and a logic control module;

the data interface module is used for identifying a plurality of groups of data signals and outputting square wave signals to the data processing module;

the data processing module is used for outputting a data code stream to the data frame identification and counting module according to the duration time of high and low levels in the square wave signal;

the data frame identification and counting module is used for counting the data code stream to obtain a current data frame value and feeding the current data frame value back to the logic control module;

and the logic control module is used for comparing the data frame numerical value with the number of the pre-stored address codes, and when the numerical values are matched, acquiring a gray data signal in the current data stream and outputting the gray data signal to the output driving unit.

In one embodiment, the output driving unit includes a reference module, a constant current module, a gray scale generation module, and an output driving module;

the reference module is used for outputting reference voltage to the constant current module;

the constant current module is used for outputting a constant current driving signal to the output driving module;

the gray scale generation module is used for generating a corresponding gray scale control signal to the output driving module according to the gray scale data signal;

and the output driving module is used for outputting pulse signals with duty ratios corresponding to the gray control signals and the constant current driving signals to the LED lamps.

In one embodiment, the data processing unit further comprises a register module;

the logic control module is used for outputting the gray data signal to the register module before receiving the end code signal and outputting a trigger signal to the output driving unit after receiving the end code signal;

and the output driving unit is used for acquiring the gray data signals from the register module according to the trigger signals and outputting pulse signals with duty ratios corresponding to the gray data signals to the LED lamps.

In one embodiment, the data processing unit further comprises an address burning module and an address storage module;

the data interface module is also used for acquiring a burning instruction;

the logic control module is further configured to obtain address data in the data code stream, and burn the address data into the address storage module through the address burning module.

In one embodiment, the data processing unit further comprises an oscillator module for outputting a reference frequency to each module.

Compared with the prior art, the embodiment of the invention has the following beneficial effects: in this embodiment, by setting a plurality of LED units connected in parallel, each LED unit receives the power signal of the control module to start, and counts the received multiple sets of data signals, and the count value is increased by 1 when each set of data signals is received, and the count value is compared with the pre-stored address code number, and when the two values are matched, the data signal of the current set is obtained, and the corresponding brightness or color temperature is displayed.

In the embodiment, the LED units are arranged in parallel, and each LED unit works independently without being influenced by other LED units, so that the reliability of the LED units is improved.

Drawings

Fig. 1 is a schematic structural diagram of an LED driving apparatus according to an embodiment of the present invention;

fig. 2 is a first schematic circuit diagram of an LED unit in the LED driving apparatus shown in fig. 1;

fig. 3 is a second schematic circuit diagram of an LED unit in the LED driving apparatus shown in fig. 1;

fig. 4 is a schematic diagram of a control signal in an LED driving apparatus according to an embodiment of the present invention;

fig. 5 is a schematic diagram of data signals in an LED driving apparatus according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a first structure of an LED driving module in the unit shown in FIG. 3;

FIG. 7 is a schematic diagram of a second structure of the LED driving module in the unit shown in FIG. 3;

fig. 8 is a schematic diagram of a third structure of the LED driving module in the unit shown in fig. 3.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in 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.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

A first aspect of an embodiment of the present invention provides an LED driving apparatus.

As shown in fig. 1, fig. 1 is a schematic structural diagram of an LED driving apparatus provided in an embodiment of the present invention, in the embodiment, the LED driving apparatus includes a control module 100 and a plurality of LED units;

the plurality of LED units are connected in parallel to a power supply end and a signal end of the control module 100 through a power bus IC +/IC-and a signal bus Data;

the control module 100 is configured to output a working power to each LED unit through a power bus IC +/IC-and output a control signal to each LED unit through a data bus, where the control signal of each frame includes a plurality of sets of data signals;

each LED unit for:

according to the power-on starting of the working power supply, counting a plurality of groups of data signals, and acquiring the data signals of the current group when the counting value is matched with the number of the pre-stored address codes; and

In this embodiment, the plurality of LED units are connected to two ends of the control module 100 through a signal bus and a power bus, the front end of the control module 100 is connected to an ac power supply or a dc power supply, and converts the signal into a working power of a corresponding size to each rear LED unit, the control module 100 includes a power conversion module and a corresponding signal generation module, the power conversion module is configured to convert the received power signal into the working power, the signal generation module is configured to output a control signal of one or more frames to each LED unit, each frame includes a plurality of sets of data signals, the number of the sets of data signals is correspondingly designed according to the number of the LED units, for example, when 512 LED units are provided, the number of groups of data signals is 512, each group of data signals is input to one LED unit, as shown in fig. 2, the plurality of sets of data signals are sequentially output in sequence corresponding to the number of addresses of the LED units.

When the control module 100 outputs a plurality of sets of data signals, each LED unit counts the received data signals respectively, the initial value is zero, 1 is counted each time a set of data signals is received, the data signals are accumulated one by one and compared with the number of pre-stored address codes, for example, the number of address codes of the first LED unit 200 is 1, the number of address codes of the second LED unit 300 is 2, and so on, when the number of address codes is 1, the address codes are matched with the number of address codes of the first LED unit 200, so that the first LED unit 200 records the first set of data signals and displays the brightness or color temperature corresponding to the first set of data signals, when the second set of data signals is input, the count value of the first LED unit 200 is 2, and is not matched with the number of address codes, at this time, the count value of the second LED unit 300 is 2, and is matched with the number of address codes, the second LED unit 300 records the second set of data signals and displays the brightness or color temperature corresponding to the second set of data signals, by analogy, the driving control of each LED unit is realized until the last LED unit, each LED unit works independently and is not influenced by other LED units, and the reliability of the LED units is improved.

The LED unit can be composed of at least one LED lamp and a corresponding driving module, the specific structure is not limited, and the structure of the driving module and the number and types of the LED lamps are not limited.

In this embodiment, by setting a plurality of LED units connected in parallel, each LED unit receives the power signal of the control module 100 to start, and counts the received multiple sets of data signals, and counts the number of times of receiving a set of data signals by 1, and compares the count value with the number of pre-stored address codes, and when the two numbers match, obtains the data signal of the current set, and displays the corresponding brightness or color temperature.

As shown in fig. 2, in order to switch the display brightness or color temperature in different frames, in one embodiment, the control signal further includes an end code signal, each LED unit maintains a previous display state before receiving the end code signal, updates the display brightness or color temperature according to the received data signal after receiving the end code signal, and re-counts after receiving the end code signal.

In this embodiment, the control module 100 sends an end code signal at the end of a frame of control signals, the end code signal indicates that the driving of the current frame is finished to prepare for receiving the next frame of control signals, the LED unit has two display switching modes according to the end code signal, one mode is to register the received matched data signal in advance, before the end code signal is not received, the LED unit maintains the output state and the display state of the previous frame, and when the end code signal is received, the LED unit outputs a corresponding output according to the newly received data signal to further switch the display state.

Or, the corresponding output is made according to the newly received data signal in time, the display state is switched, and when the end code signal is received, the received data signal is counted again, and the next group of data signals is identified and received.

In one embodiment, each LED unit includes an LED driving module and at least one LED lamp;

one end of at least one LED lamp is connected in parallel and is connected with a power bus, the other end of at least one LED lamp is respectively connected with at least one signal end of an LED driving module one by one, and the LED driving module is also connected with the power bus and the signal bus;

and the LED driving module is used for outputting a pulse signal with a duty ratio corresponding to the current group of data signals to each LED lamp.

In this embodiment, one or more LED lamps may be provided and are respectively connected to the signal output terminals of the LED driving modules one by one, and connected to the positive power terminal IC + or the negative power terminal IC-of the power bus, so as to implement negative output driving or positive output driving.

The LED driving module may be a switching power circuit, an LED driving chip U1, and in one embodiment, the LED driving module is an LED driving chip U1.

As shown in fig. 3, when the LED driving circuit is driven by negative output, anodes of the LED lamps are connected in parallel and are connected to the positive power terminal IC +, cathodes of the LED lamps are connected to signal terminals of the LED driving chip U1, and the LED driving chip U1 outputs pulse signals with duty ratios corresponding to the respective sets of received data signals to the LED lamps.

As shown in fig. 4, when the LED driving circuit is in positive output driving, the cathodes of the LED lamps are connected in parallel to the negative power supply IC-, the anodes of the LED lamps are connected to the signal terminals of the LED driving chip U1, and the LED driving chip U1 outputs pulse signals with duty ratios corresponding to the respective sets of received data signals to the LED lamps.

Each LED driving chip U1 has N signal output terminals, where N is the number of LED lamps, as shown in fig. 5, each group of data signals has N data signals, the LED driving chip U1 controls the output of each output terminal according to each received data signal, each data signal has M bits, so as to control the number of gray scales, for example, when M is 6, the number of gray scales is 6 powers of 2, i.e., 64, when M is 8, the number of gray scales is 8 powers of 2, i.e., 256, the display brightness can be divided into 64 levels or 256 levels according to the number of gray scales, thereby realizing hierarchical control.

As shown in fig. 6, in one embodiment, the LED driving module includes a data processing unit 10 and an output driving unit 20;

the data processing unit 10 is used for counting a plurality of groups of data signals of each frame, comparing the counted data signals with the number of pre-stored address codes, and outputting corresponding gray scale data signals to the output driving unit 20 according to the matched data signals;

and the output driving unit 20 is used for outputting a pulse signal with a duty ratio corresponding to the gray data signal to each LED lamp.

In this embodiment, the number of address codes is stored in the data processing unit 10, the data processing unit 10 is configured to receive and count a plurality of groups of data signals, a time value is incremented by 1 when a group of data signals is received, the count value is compared with the number of address codes prestored in real time, if the count value is equal to the number of address codes, a gray data signal in the group of data signals is obtained and output to the output driving unit 20, if the count value is not equal to the number of address codes, counting is continued, and the output driving unit 20 outputs a pulse signal with a corresponding duty ratio to each connected LED lamp according to the received gray data signal.

When the LED driving module is a corresponding driving circuit, the data processing unit 10 and the output driving unit 20 may be a corresponding controller, counter and converting circuit, and when the LED driving module is an LED driving chip U1, the data processing unit 10 and the output driving unit 20 are a processor, counter and converter integrated therein.

As shown in fig. 7, in one embodiment, the data processing unit 10 includes a data interface module 11, a data processing module 12, a data frame identification and counting module 13, and a logic control module 14;

the data interface module 11 is used for identifying a plurality of groups of data signals and outputting square wave signals to the data processing module 12;

the data processing module 12 is configured to output a data code stream to the data frame identifying and counting module 13 according to the high-low level duration time in the square wave signal;

the data frame identification and counting module 13 is used for counting the data code stream to obtain a current data frame value, and feeding the current data frame value back to the logic control module 14;

and the logic control module 14 is configured to compare the data frame number with a pre-stored address code number, and when the data frame number matches the pre-stored address code number, obtain a gray data signal in the current data stream and output the gray data signal to the output driving unit 20.

In this embodiment, the data interface module 11, the data processing module 12 and the data frame identification and counting module 13 are sequentially connected, the logic control module 14 is respectively connected with the data processing module 12 and the data frame identification and counting module 13, the data interface module 11 receives and identifies the received data signal and outputs a square wave signal composed of a high level and a low level, the data processing module 12 outputs a data code stream to the logic control module 14 according to the duration time of the high level and the low level of the square wave signal output by the data interface module 11, the data frame identification and counting module 13 counts the data code stream to obtain a current data frame value, and feeds back the data frame value to the logic control module 14, so that the logic control module 14 compares the data frame value with a pre-stored address code number, and when the data frame value is consistent, reads a gray data signal in the current data code stream, the feedback is sent to the output driving unit 20, and the output driving unit 20 outputs a pulse signal with a corresponding magnitude to each LED lamp.

The data interface module 11, the data processing module 12, the data frame identification and counting module 13, and the logic control module 14 may employ corresponding controllers, processors, and counters.

Referring to fig. 7, in an embodiment, the output driving unit 20 includes a reference module 21, a constant current module 22, a gray scale generation module 23, and an output driving module 24;

the reference module 21 is used for outputting a reference voltage to the constant current module 22;

the constant current module 22 is used for outputting a constant current driving signal to the output driving module 24;

a gray scale generation module 23 for generating a corresponding gray scale control signal to the output driving module 24 according to the gray scale data signal;

and the output driving module 24 is used for outputting pulse signals with duty ratios corresponding to the gray control signals and the constant current driving signals to each LED lamp.

In this embodiment, the reference module 21, the constant current module 22, and the output driving module 24 are sequentially connected, the output driving module 24 is further connected to the gray scale generating module 23, the reference module 21 may be a reference source or a reference circuit, the reference module 21 outputs a reference voltage to the constant current module 22, the constant current module 22 may be a constant current driving circuit or a constant current control circuit, such as a constant current driving chip, the constant current module 22 outputs a corresponding constant current driving signal to the output driving module 24, the output driving module 24 performs signal conversion according to the received constant current driving signal and a corresponding gray scale control signal and outputs a pulse signal with a duty ratio corresponding to the magnitude to each LED lamp, and the output driving module 24 may be a switching power supply circuit or a converter, which is not limited in specific structure.

As shown in fig. 8, in one embodiment, the data processing unit 10 further comprises a register module 15;

the logic control module 14 is configured to output the gray data signal to the register module 15 before receiving the end code signal, and output a trigger signal to the output driving unit 20 after receiving the end code signal;

and the output driving unit 20 is configured to obtain the gray data signal from the register module 15 according to the trigger signal, and output a pulse signal with a duty ratio corresponding to the gray data signal to each LED lamp.

In this embodiment, the register module 15 is connected to the logic control module 14 and the gray scale generation module 23, and when the logic control module 14 obtains the corresponding gray scale data signal, the gray scale data signal is registered in the register module 15 in advance, and after receiving the end code, the output driving module 24 is triggered to operate, that is, the gray scale generation module 23 is triggered to operate, and the registered gray scale data signal is read from the register module 15, so as to output a pulse signal to each LED lamp.

The register module 15 may be a unit or a module having a storage structure such as a memory, a register, or the like.

Referring to fig. 8, in an embodiment, the data processing unit 10 further includes an address burning module 16 and an address storage module 17;

the data interface module 11 is further configured to obtain a burning instruction;

the logic control module 14 is further configured to obtain address data in the data code stream, and burn the address data into the address storage module 17 through the address burning module 16.

In this embodiment, the data interface module 11 may receive a burning command and a data signal, and convert the received burning command or data signal into a high-low level square wave signal to the data processing module 12, the data processing module 12 outputs a data code stream to the logic control module 14 according to the duration of the high-low level, the logic control module 14 performs signal judgment before working, and enters an address burning mode when judging that the signal is a burning command, the logic control module 14 reads address data in the data code stream, burns the address data into the chip through the address burning module 16, and stores a current burning address, that is, the number of address codes of each chip through the address storage module 17.

When the command is judged to be the working mode command, the working mode is entered, the data frame identification and counting module 13 counts the data code stream output by the data processing module 12 to obtain the value of the currently received data frame, and the value is output to the logic control module 14; the address storage module 17 outputs the address code value to the logic control module 14 according to the address information stored by itself, the logic control module 14 compares the address code value with the current data frame count value, if the address code value is consistent with the current data frame count value, the gray scale data signal of the current data code stream is read and stored in the register module 15, when the end code signal is received, the gray scale generation module 23 generates a control signal according to the data of the register module 15 and outputs the control signal to the output driving module 24, and the output driving module 24 outputs pulse signals with different duty ratios to each LED lamp according to the control signal.

In one embodiment, the data processing unit 10 further comprises an oscillator module 18, the oscillator module 18 being configured to output a reference frequency to each module to provide the reference frequency to each module.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described LED driving module embodiments are merely illustrative, and for example, the division of the LED driving module is only a logical function division, and there may be other division ways in actual implementation, for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The LED driving module, if implemented in the form of a software functional unit and sold or used as a separate product, 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.

The above-mentioned embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims

1. An LED driving device is characterized by comprising a control module and a plurality of LED units;

the plurality of LED units are connected in parallel to a power supply end and a signal end of the control module through a power bus and a signal bus;

each of the LED units is configured to:

2. The LED driving apparatus according to claim 1, wherein the control signal further includes an end code signal, each of the LED units maintains a previous display state until receiving the end code signal, updates a display brightness or a color temperature according to the received data signal after receiving the end code signal, and re-counts after receiving the end code signal.

3. The LED driving apparatus according to claim 2, wherein each of the LED units includes an LED driving module and at least one LED lamp;

4. The LED driving apparatus according to claim 3, wherein the LED driving module is an LED driving chip.

5. The LED driving apparatus according to claim 3, wherein the LED driving module includes a data processing unit and an output driving unit;

6. The LED driving apparatus according to claim 5, wherein the data processing unit includes a data interface module, a data processing module, a data frame recognition and counting module, and a logic control module;

and the logic control module is used for comparing the data frame numerical value with the pre-stored address code number, and when the numerical values are matched, acquiring a gray data signal in the current data stream and outputting the gray data signal to the output driving unit.

7. The LED driving apparatus according to claim 5, wherein the output driving unit includes a reference module, a constant current module, a gray scale generation module, and an output driving module;

8. The LED driving apparatus according to claim 6, wherein the data processing unit further includes a register module;

9. The LED driving apparatus according to claim 8, wherein the data processing unit further includes an address burning module and an address storage module;

the data interface module is also used for acquiring a burning command;

10. The LED driving apparatus according to claim 9, wherein the data processing unit further includes an oscillator module for outputting a reference frequency to each module.