CN219066407U - Integrated LED drive circuit, LED display circuit and electrical equipment - Google Patents
Integrated LED drive circuit, LED display circuit and electrical equipment Download PDFInfo
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- CN219066407U CN219066407U CN202223264552.2U CN202223264552U CN219066407U CN 219066407 U CN219066407 U CN 219066407U CN 202223264552 U CN202223264552 U CN 202223264552U CN 219066407 U CN219066407 U CN 219066407U
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Abstract
The utility model discloses an integrated LED driving circuit, an LED display circuit and electrical equipment, wherein the integrated LED driving circuit comprises an integrated driving module, and the integrated driving module comprises a first driving chip and a second driving chip; the LED display device comprises a first driving chip, a first LED display module and a second LED display module, wherein the output end of the first driving chip is connected with the LED display module, the input end of the first driving chip inputs a scanning control signal, and the output end of the first driving chip is used for outputting a first driving signal to the LED display module; the output end of the first driving chip is used for outputting a first driving signal to the LED display module; the integrated LED driving circuit drives the LED display module by integrating the two driving chips, so that the structure of the driving circuit can be effectively simplified.
Description
Technical Field
The utility model relates to the technical field of switching power supplies, in particular to an integrated LED driving circuit, an integrated LED display circuit and integrated electrical equipment.
Background
The application of LED tubes is becoming more and more widespread, for example, LED nixie tube display devices or LED dot matrix display devices are used to display information in application schemes of many electronic products. For example, the LED tube is applied to an air conditioner, and the current operation state of the air conditioner can be displayed.
At present, the LED driving circuit in the air conditioner drives the common end of the LED nixie tube display device or the LED lattice display device by using triodes outside the driving integrated circuit, and each nixie tube in the corresponding LED nixie tube display device needs a triode and a base current limiting resistor of the triode, so that the circuit wiring difficulty is increased, and the driving circuit has a complex structure.
There is thus a need for improvements and improvements in the art.
Disclosure of Invention
The utility model aims to provide an integrated LED driving circuit, an LED display circuit and electrical equipment, wherein the integrated LED driving circuit drives an LED display module through integrating two driving chips, so that the structure of the driving circuit can be effectively simplified.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the embodiment of the application provides an integrated LED driving circuit, which comprises:
the integrated driving module comprises a first driving chip and a second driving chip;
the LED display device comprises a first driving chip, a first LED display module and a second LED display module, wherein the output end of the first driving chip is connected with the LED display module, the input end of the first driving chip inputs a scanning control signal, and the output end of the first driving chip is used for outputting a first driving signal to the LED display module;
the output end of the first driving chip is used for outputting a first driving signal to the LED display module.
In some embodiments, the integrated LED driver circuit, the first driver chip comprises:
n first input ports, each first input port is used for inputting a scanning control signal;
and N first output ports, wherein each first output port is used for outputting a corresponding first driving signal according to a corresponding scanning control signal, and N is a positive integer greater than or equal to 1.
In some embodiments, the integrated LED driving circuit, the second driving chip includes:
m second input ports, each for inputting an enable control signal;
and M second output ports, each second output port is used for outputting a corresponding second driving signal according to a corresponding enabling control signal, wherein M is a positive integer greater than or equal to 1.
In some embodiments, the integrated LED driving circuit further comprises an adjusting module, one end of the adjusting module is connected with the M second output ports, and the other end of the adjusting module is connected with the LED display module.
In some embodiments, the integrated LED driving circuit includes M adjustment units, one end of each adjustment unit is correspondingly connected to a second output port, and the other end of each adjustment unit is connected to the LED display module.
In some embodiments, the integrated LED driving circuit includes a first resistor and a second resistor, one end of the first resistor is connected to the corresponding second output port, the other end of the second resistor is connected to the LED display module, and the second resistor is connected in parallel to the first resistor.
The embodiment of the application also provides an LED display circuit, which comprises the integrated LED drive circuit and an LED display module, wherein the LED display module comprises N gating ends, M public ends and M LED display units, the M LED display units are connected with the M public ends in a one-to-one correspondence manner, and each LED display unit is also connected with the N gating ends;
each LED display unit comprises N LED lamp strings, the input ends of the N LED lamp strings are connected with N gating ends in a one-to-one correspondence manner, and the output ends of the N LED lamp strings are connected with the same public end;
n gating ends are connected with the first driving chip, M public ends are connected with the second driving chip, N gating ends are used for respectively receiving corresponding first driving signals, and M public ends are used for respectively receiving corresponding second driving signals.
In some embodiments, the LED display circuit includes at most three LED light emitting diodes in series in each string of LED light strings.
In some embodiments, the LED display module of the LED display circuit is an LED nixie tube display module or an LED lattice display module.
The embodiment of the application also provides an electrical device comprising the LED display circuit.
Compared with the prior art, the utility model provides an integrated LED driving circuit, an LED display circuit and electrical equipment, wherein the integrated LED driving circuit comprises an integrated driving module, and the integrated driving module comprises a first driving chip and a second driving chip; the LED display device comprises a first driving chip, a first LED display module and a second LED display module, wherein the output end of the first driving chip is connected with the LED display module, the input end of the first driving chip inputs a scanning control signal, and the output end of the first driving chip is used for outputting a first driving signal to the LED display module; the output end of the first driving chip is used for outputting a first driving signal to the LED display module; the integrated LED driving circuit drives the LED display module by integrating the two driving chips, so that the structure of the driving circuit can be effectively simplified.
Drawings
Fig. 1 is a block diagram of an LED display circuit according to the present utility model.
Fig. 2 is a schematic structural diagram of an LED display module in the LED display circuit according to the present utility model.
Fig. 3 is a block diagram of a first driving chip in the integrated LED driving circuit according to the present utility model.
Fig. 4 is a block diagram of a second driving chip in the integrated LED driving circuit according to the present utility model.
Fig. 5 is a schematic diagram of a first driving chip in the LED display circuit provided by the present utility model.
Fig. 6 is a schematic connection diagram of two driving chips and an LED display module in the LED display circuit provided by the present utility model.
Fig. 7 is a schematic diagram of a regulation module in an integrated LED driving circuit according to the present utility model.
Fig. 8 is a schematic diagram of an LED digital display module in the integrated LED driving circuit according to the present utility model.
Detailed Description
The utility model aims to provide an integrated LED driving circuit, an LED display circuit and electrical equipment, wherein the integrated LED driving circuit drives an LED display module through integrating two driving chips, so that the structure of the driving circuit can be effectively simplified.
In order to make the objects, technical solutions and effects of the present utility model clearer and more specific, the present utility model will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1, the LED display circuit provided by the present utility model includes an integrated LED driving circuit and an LED display module 20, where the LED driving circuit is connected to the LED display module 20 and is configured to output a first driving signal and a second driving signal to drive the LED display module 20 to light. The integrated LED display module 20 includes an integrated driving module 10, and the integrated driving module 10 includes a first driving chip 11 and a second driving chip 12.
Specifically, the first driving chip 11 is connected with the LED display module 20, the input end of the first driving chip 11 inputs a scanning control signal, the output end of the first driving chip 11 is connected with the LED display module 20, the input end of the first driving chip 11 inputs a scanning control signal, and the output end of the first driving chip 11 is used for outputting the first driving signal to the LED display module 20; the output end of the second driving chip 12 is connected with the LED display module 20, the input end of the second driving chip 12 inputs an enabling control signal, and the output end of the first driving chip 11 is used for outputting a second driving signal to the LED display module 20. The first driving signal is a high level signal, the second driving signal is a low level signal, and the LED display module 20 lights up the display according to the first driving signal and the second driving signal.
According to the utility model, the two driving chips are arranged to provide driving signals for the LED display module 20, no additional circuit structure is needed, and the LED display module 20 can be driven to light only by outputting corresponding high-low level signals through the first driving chip 11 and the second driving chip 12, so that the circuit wiring is simplified, and the circuit structure of a driving circuit is simplified.
In some embodiments, referring to fig. 2, the LED display module 20 includes N strobe terminals, M common terminals, and M LED display units 21, where the M LED display units 21 are connected to the M common terminals in a one-to-one correspondence manner, and each LED display unit 21 is also connected to the N strobe terminals; each LED display unit 21 comprises N LED light strings 211, the input ends of the N LED light strings 211 are connected with N gating ends in a one-to-one correspondence manner, and the output ends of the N LED light strings 211 are connected with the same common end; n gating ends are connected with the first driving chip 11, M public ends are connected with the second driving chip 12, N gating ends are used for respectively receiving corresponding first driving signals, M public ends are used for respectively receiving corresponding second driving signals, and N and M are positive integers which are larger than or equal to 1.
For example, if N is 7 and m is 6, 7 gates are marked as A, B, C, D, E, F and G, respectively, and 6 common terminals are 1, 2, 3, 4, 5, and 6, respectively. Correspondingly, the LED display module 20 includes 6 LED display units 21, and each LED display unit 21 includes 7 LED light strings 211. The output ends of 7 LED light strings 211 in each LED display unit 21 are all connected with the same common end, and 6 LED display units 21 are connected with 6 common ends in a one-to-one correspondence. If the 6 LED display units 21 are sequentially ordered, the output ends of the 7 LED light strings 211 in the first LED display unit 21 are all connected with the common end 1, the output ends of the 7 LED light strings 211 in the second LED display unit 21 are all connected with the common end 2, and so on, the output ends of the 7 LED light strings 211 in the 6 th LED display unit 21 are all connected with the common end 6, i.e. each LED display unit 21 is connected with one common end in a one-to-one correspondence manner.
The input ends of the 7 LED strings 211 in each LED display unit 21 are respectively connected to one of the strobe ends. If the 7 LED light strings 211 in each LED display unit 21 are sequentially ordered, the input end of the first LED light string 211 in each LED display unit 21 is connected with the gating end a, the input end of the second LED light string 211 in each LED display unit 21 is connected with the gating end B, the input end of the third LED light string 211 in each LED display unit 21 is connected with the gating end C, and so on, the input end of the 7 th light string in each LED display unit 21 is connected with the gating end G, i.e. the 7 LED light strings 211 in the 6 LED display units 21 are respectively connected with the 7 gating ends in a one-to-one correspondence manner.
The input end of each LED string light 211 obtains a second driving signal according to the corresponding common end, and the output end of each LED string light 211 obtains a first driving signal according to the corresponding strobe end, and when the LED string light 211 receives the first driving signal and the second driving signal at the same time, the LED string light 211 is correspondingly lighted.
In order to drive the LED light string 211 in the LED display module 20 to light, referring to fig. 3, the first driving chip 11 includes N first input ports 111, and each first input port 111 is used for inputting a scan control signal; and N first output ports 112, wherein each first output port 112 is configured to output a corresponding first driving signal according to a corresponding scanning control signal, and N is a positive integer greater than or equal to 1. The N first output ports 112 of the first driving chip 11 are respectively connected to one of the gate terminals, so as to provide the first driving signal for the corresponding LED light string 211 in each LED display unit 21. The N first input ports 111 of the first driving chip 11 are connected to a main chip of the electrical equipment, and acquire a scan control signal output by the main chip, where the scan control signal is equivalent to a driving signal output by the main chip, and the first driving chip 11 enhances the driving capability of the driving signal and then outputs a first driving signal.
Referring to fig. 4, the second driving chip 12 includes M second input ports 121, and each second input port 121 is used for inputting an enable control signal; and M second output ports 122, each second output port 122 is configured to output a corresponding second driving signal according to a corresponding enabling control signal, where M is a positive integer greater than or equal to 1. The M output ports of the second driving chip 12 are respectively and correspondingly connected to a common terminal, so as to provide a second driving signal for each LED display unit 21, that is, provide the second driving signal for the output terminals of the N LED light strings 211 in the corresponding LED display unit 21. The M second input ports 121 of the second driving chip 12 are connected to the main chip of the electrical device, and acquire the enabling control signal output by the main chip, where the enabling control signal is equivalent to the driving signal output by the main chip, and the second driving chip 12 outputs the second driving signal after enhancing the driving capability of the driving signal.
As an embodiment, the type of the first driving chip 11 may be an IC62783, as shown in fig. 5, which is a schematic diagram of the driving chip, the scanning control signal received by the driving chip is a high level signal, and the corresponding output first driving signal is also a high level signal; the model of the second driving chip 12 is ULN2003A, and the enabling control signal received by the driving chip is a high level signal, and the correspondingly output second driving signal is a low level signal. As shown in fig. 6, if N is 7, the 7 first input ports 111 of the first driving chip 11 may be SEG1', SEG2', SEG3', SEG4', SEG5', SEG6', and SEG7', and the 7 first output ports 112 of the first driving chip 11 may be SEG1, SEG2, SEG3, SEG4, SEG5, SEG6, and SEG7, respectively. If M is 6, the 6 second input ports 121 of the second driving chip 12 may be COM1, COM2, COM3, COM4, COM5, and COM6, respectively, and the 6 second output ports 122 of the second driving chip 12 may be COM1', COM2', COM3', COM4', COM5', and COM6', respectively.
In the utility model, the enabling control signal and the scanning control signal are both high-level signals output by the main chip, the first driving chip 11 outputs high-level signals according to the high-level signals, and the second driving chip 12 outputs low-level signals according to the high-level signals, namely, the LED lamp string 211 is driven to be lightened by setting the high-level and low-level of the chip, so that the flicker effect of the LED display module 20 can be realized by setting the frequency of the high-level and the low-level.
In this embodiment, when the input end of the LED string light 211 is a high level signal and the output end of the LED string light 211 is a low level signal, the LED string light 211 is turned on. The first driving chip 11 provides a high level signal for the input end of the LED string light 211, and the maximum current value output by the first driving chip 11 may be 500mA, so that the high brightness LED string light 211 can be driven, and the brightness of the LED display module 20 is enhanced.
In some embodiments, referring to fig. 7, the integrated LED driving circuit further includes a regulating module 13, one end of the regulating module 13 is connected to the M second output ports 122, and the other end of the regulating module 13 is connected to the M common ends of the LED display module 20. Specifically, the adjusting module 13 includes M adjusting units 131, one end of each adjusting unit 131 is correspondingly connected to one second output port 122, and the other end of each adjusting unit 131 is correspondingly connected to a common end of one LED display module 20. Equivalently, each LED display unit 21 is correspondingly connected to an adjusting unit 131, and the adjusting unit 131 is used for adjusting the display brightness of each LED display unit 21.
As an embodiment, each adjusting unit 131 includes a first resistor R1 and a second resistor R2, one end of the first resistor R1 is connected to the corresponding second output port 122, the other end of the second resistor R2 is connected to the LED display module 20, and the second resistor R2 is connected in parallel to the first resistor R1. The first resistor R1 and the second resistor R2 are current limiting resistors, and corresponding current values of the second driving signals can be adjusted by setting resistance values of the first resistor R1 and the second resistor R2 so as to adjust current values of the LED light strings 211, and further achieve brightness adjustment of the corresponding LED display units 21. Each LED display unit 21 is connected to one corresponding, and thus the brightness of the LED display module 20 can be adjusted as a whole.
As an embodiment, please continue to refer to fig. 2, each LED string 211 is connected with at most 3 LEDs in series, and compared to the arrangement of only a single LED in a single-chip driving circuit, the present utility model can flexibly set the number of LEDs, thereby improving the flexibility of the arrangement of the LED strings 211.
The LED display module 20 may be an LED digital display module (as shown in fig. 8) or an LED dot matrix display module, and the LED display module 20 is driven to light up, and then the LED digital display module or the LED dot matrix display module is driven to display corresponding icons.
Further, the present utility model also provides an integrated LED driving circuit accordingly, and since the integrated LED driving circuit is described in detail above, the details are not repeated here.
Further, the utility model also correspondingly provides an electrical device, which comprises the LED display circuit. The electronic equipment can be an air conditioner, a main chip of the air conditioner provides scanning control signals and enabling control signals for the first driving chip and the second driving chip, and the first driving chip jointly drives the LED display module to light according to the scanning control signals and the enabling control signals to form corresponding icons.
Specifically, the first input port of the first driving chip and the second input port of the second driving chip are respectively connected to the corresponding I/O port of the main chip. And the main chip controls the first input port or the second input port to be driven in a scanning way, and when a certain first input port and a certain second input port are simultaneously high-level signals in the scanning driving process, the corresponding LED lamp string is lightened.
Along with the trend of the complex functions of the whole machine, the icons on the LED display module are more and more, the logic number of the LED light-emitting diodes is as few as tens and as much as one hundred, in order to save resources, the program design generally does not adopt a static scanning or one-by-one dynamic scanning method for the SEG ports and the COM ports, but only scans the SEG ports or the COM ports one by one, and the COM ports or the SEG ports corresponding to the icons required to be lightened at the moment are lightened simultaneously (called as data given ports) during scanning. The time for dynamically scanning the SEG port or the COM port for one pass is called a dynamic scanning period, and when one dynamic scanning period is completed, the next dynamic scanning period is restarted, and the shorter the dynamic scanning period is, the better the effect of the LED display module is.
Assuming that the whole machine works in a refrigeration mode with a set temperature of 20 degrees and auxiliary functions such as strong are started, icons required to be lightened by the LED display module mainly comprise: refrigeration, 2-word pen sections in the first 8-word, 0-word pen sections in the 2 nd 8-word, and strong. The 1-6 pins of the LED display module are set as COM ports, the A-G pins are set as SEG ports, the program selects the A-G series SEG ports as dynamic scanning ports according to the principle that the shorter the dynamic scanning period is, the 1-6 series COM ports are data given ports, namely the common end of the LED display module is set as low-level signals (at the moment, the second input ports of the second driving chips are all high-level signals), the scanning end of the LED display module is set as high-level signals in a one-by-one dynamic scanning mode (at the moment, the first input ports of the first driving chips are dynamically scanned and input high-level signals one by one), and the LED display module displays corresponding icons. Since the LED display circuit is described in detail above, it will not be described in detail here.
In summary, the integrated LED driving circuit, the LED display circuit and the electrical equipment provided by the utility model comprise an integrated driving module, wherein the integrated driving module comprises a first driving chip and a second driving chip; the LED display device comprises a first driving chip, a first LED display module and a second LED display module, wherein the output end of the first driving chip is connected with the LED display module, the input end of the first driving chip inputs a scanning control signal, and the output end of the first driving chip is used for outputting a first driving signal to the LED display module; the output end of the first driving chip is used for outputting a first driving signal to the LED display module; the integrated LED driving circuit drives the LED display module by integrating the two driving chips, so that the structure of the driving circuit can be effectively simplified.
It will be understood that equivalents and modifications will occur to those skilled in the art in light of the present utility model and their spirit, and all such modifications and substitutions are intended to be included within the scope of the present utility model as defined in the following claims.
Claims (10)
1. An integrated LED driver circuit, comprising:
the integrated driving module comprises a first driving chip and a second driving chip;
the LED display device comprises a first driving chip, a first LED display module, a second LED display module, a first driving chip and a second driving chip, wherein the output end of the first driving chip is connected with the LED display module, the input end of the first driving chip inputs a scanning control signal, and the output end of the first driving chip is used for outputting a first driving signal to the LED display module;
the LED display module comprises a first driving chip, a second driving chip and an LED display module, wherein the output end of the first driving chip is connected with the LED display module, the input end of the first driving chip is used for inputting an enabling control signal, and the output end of the first driving chip is used for outputting a first driving signal to the LED display module.
2. The integrated LED driver circuit of claim 1, wherein the first driver chip comprises:
n first input ports, each of which is used for inputting the scan control signal;
and N first output ports, wherein each first output port is used for outputting a corresponding first driving signal according to the corresponding scanning control signal, and N is a positive integer greater than or equal to 1.
3. The integrated LED driver circuit of claim 1, wherein the second driver chip comprises:
m second input ports, each of which is used for inputting the enable control signal;
and M second output ports, each of which is used for outputting a corresponding second driving signal according to the corresponding enabling control signal, wherein M is a positive integer greater than or equal to 1.
4. The integrated LED driver circuit of claim 3, further comprising a conditioning module having one end connected to M of the second output ports and another end connected to the LED display module.
5. The integrated LED driving circuit of claim 4, wherein the adjusting module comprises M adjusting units, one end of each adjusting unit is correspondingly connected to one second output port, and the other end of each adjusting unit is connected to the LED display module.
6. The integrated LED driving circuit of claim 5, wherein each of the adjustment units comprises a first resistor and a second resistor, one end of the first resistor being connected to the corresponding second output port, the other end of the second resistor being connected to the LED display module, the second resistor being connected in parallel with the first resistor.
7. An LED display circuit comprising an integrated LED drive circuit and LED display module according to any one of claims 1-6, said LED display module comprising N strobe terminals, M common terminals and M LED display units, M LED display units being connected in one-to-one correspondence with M common terminals, each LED display unit also being connected with N strobe terminals;
each LED display unit comprises N LED light strings, the input ends of the N LED light strings are connected with the N gating ends in a one-to-one correspondence manner, and the output ends of the N LED light strings are connected with the same public end;
the N gating ends are connected with the first driving chip, the M public ends are connected with the second driving chip, the N gating ends are used for respectively receiving the corresponding first driving signals, and the M public ends are used for respectively receiving the corresponding second driving signals.
8. The LED display circuit of claim 7, wherein at most three LED light emitting diodes are connected in series in each string of the LED light strings.
9. The LED display circuit of claim 8, wherein the LED display module is an LED nixie tube display module or an LED dot matrix display module.
10. An electrical device comprising an LED display circuit as claimed in any one of claims 7 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223264552.2U CN219066407U (en) | 2022-12-05 | 2022-12-05 | Integrated LED drive circuit, LED display circuit and electrical equipment |
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| CN202223264552.2U CN219066407U (en) | 2022-12-05 | 2022-12-05 | Integrated LED drive circuit, LED display circuit and electrical equipment |
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