CN105072756A - Light-emitting diode (LED) constant current driving circuit, driving chip and control method of driving chip - Google Patents
Light-emitting diode (LED) constant current driving circuit, driving chip and control method of driving chip Download PDFInfo
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- CN105072756A CN105072756A CN201510484249.9A CN201510484249A CN105072756A CN 105072756 A CN105072756 A CN 105072756A CN 201510484249 A CN201510484249 A CN 201510484249A CN 105072756 A CN105072756 A CN 105072756A
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Abstract
The invention relates to the technical field of the control of a light-emitting diode (LED) lamp, and provides an LED constant current driving circuit, a driving chip and a control method of the driving chip. The control method of the driving chip comprises the following steps of: judging whether a data frame is received or not, if yes, executing a step of extracting corresponding display data of the level from the received data frame and controlling the LED lamp to display according to the acquired display data of the level; and if not, generating display data according to a built-in effect algorithm, acquiring the display data of the level from the generated display data, and controlling the LED lamp to display according to the acquired display data of the level; judging whether the driving chip works in an external controller control state or a built-in display effect control state or not according to the received data frame, subsequently and automatically switching the driving chip into the built-in display effect state when external data is not received. Therefore, most driving chips of the series display system are ensured to work at display states, and subsequent maintenance is facilitated or reduced.
Description
Technical field
The present invention relates to LED control technology field, particularly relate to a kind of constant current driver circuit for LED, driving chip and control method thereof.
Background technology
At present, the driving chip of display system of connecting in prior art is connected in series step by step, as shown in Figure 1, the display data that driving chip reads are transmitted step by step to rear stage driving chip by previous stage driving chip, namely when N level driving chip receives the data flow of N-1 level driving chip output, the intercepting display needed for (N level) at the corresponding levels controls its light fixture connected according to this and shows corresponding effect, more remaining data are exported to the display unit of N+1 level driving chip.When peripheral control unit damages or in series connection display system, a certain driving chip damages (DOUT port does not export), then follow-up chip does not receive data, follow-up chip can not the connected LED of Data Control at the corresponding levels corresponding to it show, need to keep in repair series connection display system, to ensure certain display effect at once.
In sum, when certain driving chip existed in prior art in series connection display system damages, subsequent drive chip this DBMS that can not receive corresponding to it is caused to make connected LED can not carry out the problem shown.
Summary of the invention
The object of the present invention is to provide a kind of constant current driver circuit for LED, driving chip and control method thereof, when being intended to solve certain driving chip damage for existing in prior art in series connection display system, subsequent drive chip this DBMS that can not receive corresponding to it is caused to make connected LED can not carry out the problem shown.
The present invention is achieved in that first aspect provides a kind of control method of driving chip, and described control method comprises the following steps:
A. judge whether to receive Frame, be, then perform step B, no, then perform step C;
B. from the Frame received, extract the corresponding levels display data of its correspondence, and perform step D;
C. generate display data according to built-in effect algorithm, and from the display data of described generation, obtain display data at the corresponding levels, and perform step D;
D. show according to obtained corresponding levels display Data Control LED.
In conjunction with first aspect, as the first execution mode of first aspect, further comprising the steps of after described step B:
Next driving chip is sent to after received Frame or the remaining data frame after extracting display data at the corresponding levels are carried out shaping.
In conjunction with first aspect, as the second execution mode of first aspect, further comprising the steps of after described step C:
The display data of described generation or the remaining data after extracting display data at the corresponding levels are sent to next driving chip.
Second aspect present invention provides a kind of driving chip, and described driving chip and multiple driving chip are connected in series, and described driving chip comprises internal control/external control judge module, latch module, display data generation module and PWM scan module;
Described internal control/external control judge module is used for judging whether to receive Frame;
When the judged result of described internal control/external control judge module is for being, described internal control/external control judge module drives described latch module from the Frame received, extract the corresponding levels display data of its correspondence;
When the judged result of described internal control/external control judge module is no, described internal control/external control judge module drives described display data generation module to generate display data according to built-in effect algorithm, and drives described latch module from the display data of described generation, obtain display data at the corresponding levels;
Described PWM scan module is used for showing according to obtained corresponding levels display Data Control LED.
In conjunction with second aspect, as the first execution mode of second aspect, described driving chip also comprises shaping regeneration module;
Described internal control/external control judge module is also for sending to described shaping regeneration module by received Frame or the remaining data frame after extracting display data at the corresponding levels;
Described shaping regeneration module sends to next driving chip after being used for that received Frame or the remaining data frame after extracting display data at the corresponding levels are carried out shaping.
In conjunction with second aspect, as the second execution mode of second aspect, described driving chip also comprises shaping regeneration module;
Described internal control/external control judge module is also for sending to described shaping regeneration module by the display data of described generation or the remaining data after extracting display data at the corresponding levels;
Described shaping regeneration module sends to next driving chip after being used for that the display data of described generation or the remaining data after extracting display data at the corresponding levels are carried out shaping.
Third aspect present invention provides a kind of constant current driver circuit for LED, described constant current driver circuit for LED comprises multiple driving chip, the quantity of multiple described driving chip to be n, n be greater than 1 positive integer, described multiple driving chip is connected in series by data wire, it is characterized in that:
Each driving chip is used for judging whether to receive Frame;
When judged result is for being, from the Frame received, extract the corresponding levels display data of its correspondence;
When judged result is no, generate display data according to built-in effect algorithm, and from the display data of described generation, obtain display data at the corresponding levels;
Each driving chip described is also for showing according to obtained corresponding levels display Data Control LED.
In conjunction with the third aspect, as the first execution mode of the third aspect, described driving chip comprises internal control/external control judge module, latch module, display data generation module and PWM scan module;
Described internal control/external control judge module is used for judging whether to receive Frame;
When the judged result of described internal control/external control judge module is for being, described internal control/external control judge module drives described latch module from the Frame received, extract the corresponding levels display data of its correspondence;
When the judged result of described internal control/external control judge module is no, described internal control/external control judge module drives described display data generation module to generate display data according to built-in effect algorithm, and drives described latch module from the display data of described generation, obtain display data at the corresponding levels;
Described PWM scan module is used for showing according to obtained corresponding levels display Data Control LED.
In conjunction with the third aspect, as the second execution mode of the third aspect, described driving chip also comprises shaping regeneration module;
Described internal control/external control judge module is also for sending to described shaping regeneration module by received Frame or the remaining data frame after extracting display data at the corresponding levels;
Described shaping regeneration module sends to next driving chip after being used for that received Frame or the remaining data frame after extracting display data at the corresponding levels are carried out shaping.
In conjunction with the third aspect, as the third execution mode of the third aspect, described driving chip also comprises shaping regeneration module;
Described internal control/external control judge module is also for sending to described shaping regeneration module by the display data of described generation or the remaining data after extracting display data at the corresponding levels;
Described shaping regeneration module sends to next driving chip after being used for that the display data of described generation or the remaining data after extracting display data at the corresponding levels are carried out shaping.
The invention provides a kind of constant current driver circuit for LED, driving chip and control method thereof, judge to be in be operated in peripheral control unit state of a control or built-in display effect state of a control according to whether receiving Frame, when not receiving external data, such as, in display system of connecting in application process, certain driving chip breaks down, then the automatic switchover of subsequent drive chip enters built-in display effect state, ensure that series connection display system major part driving chip is still operated in show state, facilitate subsequent maintenance or reduce subsequent maintenance.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of display system of connecting in prior art;
Fig. 2 is the control method flow chart of a kind of driving chip of the embodiment of the present invention;
Fig. 3 is the schematic diagram that a kind of driving chip of the embodiment of the present invention reads data;
Fig. 4 is the schematic diagram that a kind of driving chip of the another kind of embodiment of the present invention reads data;
Fig. 5 is the schematic diagram that a kind of driving chip of the another kind of embodiment of the present invention reads data;
Fig. 6 is the structural representation of a kind of driving chip of the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In order to technical scheme of the present invention is described, be described below by specific embodiment.
The invention provides a kind of control method of driving chip, as shown in Figure 2, control method comprises the following steps:
Step S101. judges whether to receive Frame, is, then perform step S102, no, then perform step S103.
In this step, concrete, judge that the input port DIN of driving chip in the scheduled time is with or without receiving Frame, is, then perform step S102, no, then perform step S103.
Step S102. extracts the corresponding levels display data of its correspondence from the Frame received, and performs step S104.
Step S103. generates display data according to built-in effect algorithm, and from the display data generated, obtain display data at the corresponding levels, and performs step S104.
In this step, concrete, as shown in Figure 4 and Figure 5, when driving chip does not receive Frame, now driving chip is operated in built-in automatic display effect state, by implanting built-in effect algorithm in driving chip, this built-in effect algorithm can set according to the requirement of user, draws display data according to built-in effect algorithm.
Step S104. shows according to obtained corresponding levels display Data Control LED.
In this step, concrete, when reset signal (RESET) being detected, PWM output processing is carried out to data, and data feeding LED is shown.
Further, further comprising the steps of after step s 102:
Next driving chip is sent to after received Frame or the remaining data frame after extracting display data at the corresponding levels are carried out shaping.
In this step, concrete, in a kind of execution mode, after extracting the corresponding levels display data of its correspondence, all data frame data are sent to next driving chip; In a kind of execution mode, as shown in Figure 3, after extracting the corresponding levels display data of its correspondence, remaining data frame is sent to next driving chip.
Further, further comprising the steps of after step s 103:
The display data of generation or the remaining data after extracting display data at the corresponding levels are sent to next driving chip.
In this step, concrete, in a kind of execution mode, after extracting the corresponding levels display data of its correspondence, the display data of generation are sent to next driving chip; In another kind of execution mode, after extracting the corresponding levels display data of its correspondence, remaining data frame is sent to next driving chip.
Further, driving chip power input connects a upper driving chip power output end, driving chip power output end connects the power input of next driving chip, the data input pin of driving chip connects a upper driving chip data output end, the data output end of driving chip connects the data input pin of next driving chip, and the current output terminal of described driving chip connects LED.
Driving chip carries out dividing potential drop to obtain operating voltage by the mode of connecting with all the other driving chip to the voltage of input power, and output voltage gives connected next driving chip.
The invention provides a kind of control method of driving chip, judge to be in be operated in peripheral control unit state of a control or built-in display effect state of a control according to whether receiving Frame, when not receiving external data, such as, in display system of connecting in application process, certain driving chip has damaged, then the automatic switchover of subsequent drive chip enters built-in display effect state, ensure that series connection display system major part driving chip is still operated in show state, facilitate subsequent maintenance or reduce subsequent maintenance.
The another kind of embodiment of the present invention provides a kind of driving chip 20, as shown in Figure 6, this driving chip 20 is connected in series with multiple driving chip 20, and driving chip 20 comprises internal control/external control judge module 201, latch module 202, display data generation module 203 and PWM scan module 204.
Internal control/external control judge module 201 receives Frame for judging whether.
When the judged result of internal control/external control judge module 201 is for being, internal control/external control judge module 201 drives latch module 202 from the Frame received, extract the corresponding levels display data of its correspondence.
When the judged result of internal control/external control judge module 201 is no, internal control/external control judge module 201 drives display data generation module 203 to generate display data according to built-in effect algorithm, and drives latch module 202 from the display data generated, obtain display data at the corresponding levels.
PWM scan module 204 is for showing according to obtained corresponding levels display Data Control LED.
Concrete, internal control/external control judge module 201 judges that the input port DIN of driving chip 20 in the scheduled time is with or without receiving Frame, to select peripheral control unit state of a control or built-in display effect state of a control.
Further, driving chip 20 also comprises shaping regeneration module 205.
Internal control/external control judge module 201 is also for sending to shaping regeneration module 205 by received Frame or the remaining data frame after extracting display data at the corresponding levels.
Shaping regeneration module 205 sends to next driving chip 20 after received Frame or the remaining data frame after extracting display data at the corresponding levels are carried out shaping.
Further, driving chip 20 also comprises shaping regeneration module 205.
Internal control/external control judge module 201 is also for sending to shaping regeneration module 205 by the display data of generation or the remaining data after extracting display data at the corresponding levels.
Shaping regeneration module 205 sends to next driving chip 20 after the display data of generation or the remaining data after extracting display data at the corresponding levels are carried out shaping.
Further, driving chip power input connects a upper driving chip power output end, driving chip power output end connects the power input of next driving chip, the data input pin of driving chip connects a upper driving chip data output end, the data output end of driving chip connects the data input pin of next driving chip, and the current output terminal of described driving chip connects LED.
Driving chip carries out dividing potential drop to obtain operating voltage by the mode of connecting with all the other driving chip to the voltage of input power, and output voltage gives connected next driving chip.
It should be noted that, driving chip can also be connected by mode in parallel with all the other driving chip, and obtains operating voltage from input power.
The another kind of embodiment of the present invention provides a kind of constant current driver circuit for LED, constant current driver circuit for LED comprises multiple driving chip 20, the quantity of multiple driving chip 20 is n, n be greater than 1 positive integer, multiple driving chip 20 is connected in series by data wire, and each driving chip 20 receives Frame for judging whether.
When judged result is for being, from the Frame received, extract the corresponding levels display data of its correspondence.
When judged result is no, generate display data according to built-in effect algorithm, and from the display data generated, obtain display data at the corresponding levels.
Each driving chip 20 is also for showing according to obtained corresponding levels display Data Control LED.
Driving chip 20 comprises internal control/external control judge module 201, latch module 202, display data generation module 203 and PWM scan module 204.
Internal control/external control judge module 201 receives Frame for judging whether.
When the judged result of internal control/external control judge module 201 is for being, internal control/external control judge module 201 drives latch module 202 from the Frame received, extract the corresponding levels display data of its correspondence.
When the judged result of internal control/external control judge module 201 is no, internal control/external control judge module 201 drives display data generation module 203 to generate display data according to built-in effect algorithm, and drives latch module 202 from the display data generated, obtain display data at the corresponding levels.
PWM scan module 204 is for showing according to obtained corresponding levels display Data Control LED.
Concrete, internal control/external control judge module 201 judges that the input port DIN of driving chip 20 in the scheduled time is with or without receiving Frame, to select peripheral control unit state of a control or built-in display effect state of a control.
Driving chip 20 also comprises shaping regeneration module 205.
Internal control/external control judge module 201 is also for sending to shaping regeneration module 205 by received Frame or the remaining data frame after extracting display data at the corresponding levels.
Shaping regeneration module 205 sends to next driving chip 20 after received Frame or the remaining data frame after extracting display data at the corresponding levels are carried out shaping.
Driving chip 20 also comprises shaping regeneration module 205.
Internal control/external control judge module 201 is also for sending to shaping regeneration module 205 by the display data of generation or the remaining data after extracting display data at the corresponding levels.
Shaping regeneration module 205 sends to next driving chip 20 after the display data of generation or the remaining data after extracting display data at the corresponding levels are carried out shaping.
Further, driving chip power input connects a upper driving chip power output end, driving chip power output end connects the power input of next driving chip, the data input pin of driving chip connects a upper driving chip data output end, the data output end of driving chip connects the data input pin of next driving chip, and the current output terminal of described driving chip connects LED.
Driving chip carries out dividing potential drop to obtain operating voltage by the mode of connecting with all the other driving chip to the voltage of input power, and output voltage gives connected next driving chip.
It should be noted that, driving chip can also be connected by mode in parallel with all the other driving chip, and obtains operating voltage from input power.
Above content is in conjunction with concrete application implementation mode further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention; make some equivalent alternative or obvious modification without departing from the inventive concept of the premise; and performance or purposes identical, all should be considered as belonging to the scope of patent protection that the present invention is determined by submitted to claims.
Claims (10)
1. a control method for driving chip, is characterized in that, described control method comprises the following steps:
A. judge whether to receive Frame, be, then perform step B, no, then perform step C;
B. from the Frame received, extract the corresponding levels display data of its correspondence, and perform step D;
C. generate display data according to built-in effect algorithm, and from the display data of described generation, obtain display data at the corresponding levels, and perform step D;
D. show according to obtained corresponding levels display Data Control LED.
2. control method as claimed in claim 1, is characterized in that, further comprising the steps of after described step B:
Next driving chip is sent to after received Frame or the remaining data frame after extracting display data at the corresponding levels are carried out shaping.
3. control method as claimed in claim 1, is characterized in that, further comprising the steps of after described step C:
The display data of described generation or the remaining data after extracting display data at the corresponding levels are sent to next driving chip.
4. a driving chip, described driving chip and multiple driving chip are connected in series, and it is characterized in that, described driving chip comprises internal control/external control judge module, latch module, display data generation module and PWM scan module;
Described internal control/external control judge module is used for judging whether to receive Frame;
When the judged result of described internal control/external control judge module is for being, described internal control/external control judge module drives described latch module from the Frame received, extract the corresponding levels display data of its correspondence;
When the judged result of described internal control/external control judge module is no, described internal control/external control judge module drives described display data generation module to generate display data according to built-in effect algorithm, and drives described latch module from the display data of described generation, obtain display data at the corresponding levels;
Described PWM scan module is used for showing according to obtained corresponding levels display Data Control LED.
5. driving chip as claimed in claim 4, it is characterized in that, described driving chip also comprises shaping regeneration module;
Described internal control/external control judge module is also for sending to described shaping regeneration module by received Frame or the remaining data frame after extracting display data at the corresponding levels;
Described shaping regeneration module sends to next driving chip after being used for that received Frame or the remaining data frame after extracting display data at the corresponding levels are carried out shaping.
6. driving chip as claimed in claim 4, it is characterized in that, described driving chip also comprises shaping regeneration module;
Described internal control/external control judge module is also for sending to described shaping regeneration module by the display data of described generation or the remaining data after extracting display data at the corresponding levels;
Described shaping regeneration module sends to next driving chip after being used for that the display data of described generation or the remaining data after extracting display data at the corresponding levels are carried out shaping.
7. a constant current driver circuit for LED, described constant current driver circuit for LED comprises multiple driving chip, the quantity of multiple described driving chip to be n, n be greater than 1 positive integer, described multiple driving chip is connected in series by data wire, it is characterized in that:
Each driving chip is used for judging whether to receive Frame;
When judged result is for being, from the Frame received, extract the corresponding levels display data of its correspondence;
When judged result is no, generate display data according to built-in effect algorithm, and from the display data of described generation, obtain display data at the corresponding levels;
Each driving chip described is also for showing according to obtained corresponding levels display Data Control LED.
8. constant current driver circuit for LED as claimed in claim 7, it is characterized in that, described driving chip comprises internal control/external control judge module, latch module, display data generation module and PWM scan module;
Described internal control/external control judge module is used for judging whether to receive Frame;
When the judged result of described internal control/external control judge module is for being, described internal control/external control judge module drives described latch module from the Frame received, extract the corresponding levels display data of its correspondence;
When the judged result of described internal control/external control judge module is no, described internal control/external control judge module drives described display data generation module to generate display data according to built-in effect algorithm, and drives described latch module from the display data of described generation, obtain display data at the corresponding levels;
Described PWM scan module is used for showing according to obtained corresponding levels display Data Control LED.
9. constant current driver circuit for LED as claimed in claim 7, it is characterized in that, described driving chip also comprises shaping regeneration module;
Described internal control/external control judge module is also for sending to described shaping regeneration module by received Frame or the remaining data frame after extracting display data at the corresponding levels;
Described shaping regeneration module sends to next driving chip after being used for that received Frame or the remaining data frame after extracting display data at the corresponding levels are carried out shaping.
10. constant current driver circuit for LED as claimed in claim 7, it is characterized in that, described driving chip also comprises shaping regeneration module;
Described internal control/external control judge module is also for sending to described shaping regeneration module by the display data of described generation or the remaining data after extracting display data at the corresponding levels;
Described shaping regeneration module sends to next driving chip after being used for that the display data of described generation or the remaining data after extracting display data at the corresponding levels are carried out shaping.
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| CN201510484249.9A CN105072756A (en) | 2015-08-03 | 2015-08-03 | Light-emitting diode (LED) constant current driving circuit, driving chip and control method of driving chip |
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| CN201510484249.9A CN105072756A (en) | 2015-08-03 | 2015-08-03 | Light-emitting diode (LED) constant current driving circuit, driving chip and control method of driving chip |
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| CN105873289A (en) * | 2016-05-31 | 2016-08-17 | 深圳君略科技有限公司 | LED drive chip capable of configuring parameters and LED drive circuit |
| CN105873290A (en) * | 2016-05-31 | 2016-08-17 | 深圳君略科技有限公司 | LED drive chip and LED drive circuit |
| CN111538690A (en) * | 2020-07-09 | 2020-08-14 | 深圳君略科技有限公司 | Bidirectional signal transmission system and transmission method thereof |
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| CN201434261Y (en) * | 2009-04-07 | 2010-03-31 | 陈漱文 | External and internal control compatible decorative LED lamp |
| CN104517569A (en) * | 2014-12-15 | 2015-04-15 | 深圳市明微电子股份有限公司 | Series-connection display system and data transmission method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105873289A (en) * | 2016-05-31 | 2016-08-17 | 深圳君略科技有限公司 | LED drive chip capable of configuring parameters and LED drive circuit |
| CN105873290A (en) * | 2016-05-31 | 2016-08-17 | 深圳君略科技有限公司 | LED drive chip and LED drive circuit |
| CN105873289B (en) * | 2016-05-31 | 2018-01-16 | 深圳君略科技有限公司 | The LED drive chip and LED drive circuit of a kind of configurable parameter |
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Application publication date: 20151118 |