CN104517569B - Display system of connecting and its data transmission method - Google Patents
Display system of connecting and its data transmission method Download PDFInfo
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- CN104517569B CN104517569B CN201410779267.5A CN201410779267A CN104517569B CN 104517569 B CN104517569 B CN 104517569B CN 201410779267 A CN201410779267 A CN 201410779267A CN 104517569 B CN104517569 B CN 104517569B
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Abstract
The present invention relates to LED control technology field, the present invention provides a kind of series connection display system and its data transmission method, including：1st driving chip is received shares the data frame that control data is constituted by n groups display data and 1 group；Since the 1st driving chip, 1st driving chip extracts its corresponding level display data and shared control data from data frame, and the data frame for constituting shared control data and remaining display data is sent to the 2nd driving chip, is performed successively to n-th of driving chip thus in accordance with series system step by step；During being performed successively to n-th of driving chip according to series system step by step, this grade display data and shared control data of each driving chip according to corresponding to it control connected LED to be shown, by using identical control data, only need to transmit 1 secondary control data, on the basis of train cascade chip number is not reduced, tandem drive chip identical control function is realized.
Description
Technical field
The present invention relates to LED control technology field, more particularly to a kind of series connection display system and its data transmission method.
Background technology
At present, the series chip of series connection display system is connected in series step by step in the prior art, as depicted in figs. 1 and 2, series connection
The display data that chip is read is transmitted step by step from previous stage series chip to rear stage series chip, i.e., N grades series chips
When receiving the data flow that N-1 grades of series chips are exported, what the display data needed for intercepting this level (N grades) was connected with controlling it
Light fixture shows corresponding effect, then the display device by remaining data output to N+1 grades of series chips.Controlled when needing to increase
, it is necessary to increase control data while display data is sent, as shown in figure 3, the display of each series chip during function processed
Data all increase by one group of control data, are also required to send one group of control number for each series chip even if control data is identical
According to.It is exemplified below, the display frequency requirement that control system is sent is more than 30 frames, causes to ensure that LED shows to flash
The problems such as watching uncomfortable, i.e., the time of each data frame is not more than 1 second/30=33 milliseconds；Assuming that series connection display system is every
Chips are required for 1 group of (8) display data and 1 group of (2) control data, and the time that each data need is 1 microsecond, then only
The maximum chip number that can be cascaded during transmitting display data is 33ms/8us=4125；Display system of connecting increase identical
Control function, as shown in Figure 3 driving chip reading display and the signal of control data in the prior art in series connection display system
Figure, the maximum chip number now cascaded is 33ms/ (8+2) us=3300, reduces the maximum chip number of cascade；Therefore
The quantity of reduction series chip is usually required in the prior art as shown in Figure 3, to ensure display effect.In summary, existing skill
There is the problem of series chip in series connection display system needs to reduce the quantity of series chip in transmitting control data in art.
The content of the invention
It is an object of the invention to provide one kind series connection display system and its data transmission method, it is intended to solves for existing
There is the series chip in series connection display system in technology needs to reduce asking for the quantity of series chip in transmitting control data
Topic.
The present invention is achieved in that a kind of data transmission method for display system of connecting, and the series connection shows system bag
Include multiple driving chips, the quantity of multiple driving chips is n, and n is positive integer, since the 1st driving chip according to by
Level series system is connected to n-th of driving chip；
The data transmission method includes：
1st driving chip is received shares the data frame that control data is constituted by n groups display data and 1 group；
Since the 1st driving chip, the 1st driving chip extracts its corresponding from the data frame
Level display data and the shared control data, and the data frame hair that the shared control data and remaining display data are constituted
The 2nd driving chip is given, is performed successively to n-th of driving chip thus in accordance with the series system step by step；
It is described performed successively to n-th of driving chip according to the series system step by step during, each driving
This grade display data and the shared control data of the chip according to corresponding to it control connected LED to be shown.
1st driving chip extracts its corresponding level display data and the shared control from the data frame
Data simultaneously have the step of the data frame for constituting the shared control data and remaining display data is sent to the 2nd driving chip
Body is：
A. judge whether the shared control data is located at the front portion of the data frame, be, then execution step B, no, then hold
Row step C；
B. latch the shared control data and forward the shared control data, latch described level display data, string
Row shifts the shared control data and remaining described display data and is sent to the 2nd driving chip；
C. the shared control data is latched, and latches described level display data, remaining display number described in serial shift
According to the shared control data and be sent to the 2nd driving chip.
1st driving chip extracts its corresponding level display data and the shared control from the data frame
Data and the step of the data frame for constituting the shared control data and remaining display data is sent to the 2nd driving chip also
Including：
The data frame that the shared control data and remaining display data are constituted is sent to the 2nd after carrying out shaping regeneration
Driving chip.
The shared control data is voltage control information, current control information, temperature control information etc..
This grade display data of each the described driving chip according to corresponding to it and the shared control data control with
Its LED connected is specially the step of shown：
When detecting reset signal (RESET), according to the shared control data adjust the driving chip electric current,
Voltage and temperature, and display data feeding LED is shown.
The present invention also provides a kind of series connection display system, and the series connection shows that system includes multiple driving chips, Duo Gesuo
The quantity for stating driving chip is n, and n is positive integer, is connected to n-th according to series system step by step since the 1st driving chip
Driving chip,
1st driving chip is received shares the data frame that control data is constituted by n groups display data and 1 group；
Since the 1st driving chip, the 1st driving chip extracts its corresponding from the data frame
Level display data and the shared control data, and the data frame hair that the shared control data and remaining display data are constituted
The 2nd driving chip is given, is performed successively to n-th of driving chip thus in accordance with the series system step by step；
It is described performed successively to n-th of driving chip according to the series system step by step during, each driving
This grade display data and the shared control data of the chip according to corresponding to it control connected LED to be shown.
The shared control data is voltage control information, current control information and temperature control information.
The driving chip includes judge module, latch module, serial shift module and forwarding module；
Judge module is used to judge to share whether control data is located at the front portion of data frame, and receives data；
When the judged result of judge module is is, the latch module, which is latched, shares control data, the forwarding module
Forwarding shares control data, and the latch module latches this grade of display data, described in the serial shift module serial shift altogether
With control data and remaining described display data and it is sent to the 2nd driving chip；
When the judged result of judge module is no, the latch module, which is latched, shares control data, and latches described
Level display data, remaining display data and shared control data described in the serial shift module serial shift are simultaneously sent to the 2nd
Individual driving chip.
The driving chip also includes shaping regeneration module；
The data frame that the shared control data and remaining display data are constituted is carried out shaping by the shaping regeneration module
The 2nd driving chip is sent to after regeneration.
The driving chip also includes signal detection module and drive module；
When the signal detection module detects reset signal, the drive module is adjusted according to the shared control data
Electric current, voltage and the temperature of the driving chip, and display data feeding LED is shown.
The present invention provides a kind of series connection display system and its data transmission method, and driving core is made during output data
Piece shares identical control data, it is only necessary to which control data is arranged on to starting position or the end position of transmission data, and
Only need to transmit 1 secondary control data, on the basis of train cascade chip number is not reduced, realize the driving core of series connection
Piece identical control function, and circuit realiration is simple, when increasing train identical control function, does not increase series connection system
The cost of system, relative to the example mentioned in background technology, the display frequency requirement that control system is sent is more than 30 frames, i.e., in order to
The problems such as causing to watch uncomfortable will not be flashed by ensureing that LED is shown, the time of each data frame is not more than 1 second/30=33 millis
Second, it is assumed that every chips of series connection display system are required for 1 group of (8) display data and 1 group of (2) control data, per number
It is 1 microsecond according to the time of needs, then the maximum chip number that can be cascaded during transmitting display data is 33ms/8us=4125
；Display system of connecting increase identical control function, the maximum chip number now cascaded is obtained by 8us*N+2us=33ms
N is 4214, does not reduce train cascade chip number.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
In required for the accompanying drawing that uses be briefly described, it should be apparent that, drawings in the following description are only some of the present invention
Embodiment, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these
Accompanying drawing obtains other accompanying drawings.
Fig. 1 is the structural representation of series connection display system；
Fig. 2 be in the prior art series connection display system in driving chip read display data schematic diagram；
Fig. 3 be in the prior art series connection display system in driving chip read display and control data schematic diagram；
Fig. 4 is the flow chart for the data transmission method that a kind of series connection that the present invention is provided shows system；
Fig. 5 is that a kind of series connection that the present invention is provided shows that system reads the schematic diagram of display and control data；
Fig. 6 is that another series connection that the present invention is provided shows that system reads the schematic diagram of display and control data；
Fig. 7 is a kind of series chip internal structure schematic diagram that the present invention is provided.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In order to illustrate technical scheme, illustrated below by specific embodiment.
A kind of data transmission method for display system of connecting of the present invention, as shown in figure 4, series connection display system includes multiple drive
Dynamic chip, the quantity of multiple driving chips is n, and n is positive integer, is connected since the 1st driving chip according to series system step by step
It is connected to n-th of driving chip；
The series connection shows that the data transmission method of system includes：
The 1st driving chip of step S101. is received shares the data frame that control data is constituted by n groups display data and 1 group.
In the present embodiment, specifically, as shown in Figure 5 and Figure 6, shared control data can be located at before display data
Face, can also be located at behind display data, i.e. a kind of composition order of data frame is shared control data, this grade of driving chip
Display data and follow-up all driving chips display data, or another composition order of data frame is the driving of this level
The display data and shared control data of the display data of chip, follow-up all driving chips.
In the present embodiment, specifically, it is voltage control information, current control information, temperature control to share control data
Information etc..
Step S102. is since the 1st driving chip, and the 1st driving chip extracts corresponding level from data frame and shown
Registration evidence and shared control data, and the data frame that shared control data and remaining display data are constituted is sent to the 2nd drive
Dynamic chip, is performed to n-th of driving chip successively thus in accordance with series system step by step.
In the present embodiment, the 1st driving chip extracts corresponding level display data from data frame and shares control
Data, and the data frame that shared control data and remaining display data are constituted is sent to the 2nd driving chip；2nd driving
Chip extracts corresponding level display data and shared control data from data frame, and shared control data is shown with remaining
The data frame of data and composition is sent to the 3rd driving chip, until performing successively to n-th of driving chip.
In the present embodiment, can also position because the control data in step S101 can be before display data
Need to judge behind display data, therefore when the display data and shared control data of this grade of driving chip of extraction
The position of control data, step S102 is specially：
Step S1021. judges to share the front portion whether control data is located at data frame, is, then performs step S1022；It is no,
Then perform step S1023.Step S1022., which latches to share control data and forward, shares control data, latches this grade of display number
According to serial shift shares control data and remaining display data and is sent to the 2nd driving chip；
Step S1023., which is latched, shares control data, and latches this grade of display data, remaining display data of serial shift and
Share control data and be sent to the 2nd driving chip.
Further, step S102 also includes：
Step S1024. carries out the data frame that shared control data and remaining display data are constituted to send after shaping regeneration
To the 2nd driving chip.
Step S103. during performing to n-th of driving chip successively according to series system step by step, each driving
This grade display data and shared control data of the chip according to corresponding to it control connected LED to be shown.
In the present embodiment, specifically, being performed successively to the process of n-th of driving chip according to series system step by step
In, when detecting reset signal, electric current, voltage and the temperature of tandem drive chip are adjusted according to shared control data
Deng, and display data feeding LED is shown.
A kind of series connection display system of the invention, as shown in figure 1, series connection display system includes multiple driving chips, multiple drives
The quantity of dynamic chip is n, and n is positive integer, and n-th of driving is connected to according to series system step by step since the 1st driving chip
Chip；
1st driving chip is received shares the data frame that control data is constituted by n groups display data and 1 group；
Since the 1st driving chip, the 1st driving chip extracted from data frame its corresponding level display data and
Control data is shared, and the data frame that shared control data and remaining display data are constituted is sent to the 2nd driving chip, by
This is performed to n-th of driving chip successively according to series system step by step；
During being performed successively to n-th of driving chip according to series system step by step, each driving chip according to
This grade of display data and shared control data corresponding to it control connected LED to be shown.
Further description, as shown in fig. 7, driving chip 20 includes judge module 201, latch module 202, serial shift
Module 203 and forwarding module 204；
Judge module 201 is used to receive data frame and judges to share the front portion whether control data is located at data frame；
When the judged result of judge module 201 is is, latch module 202, which is latched, shares control data and this level display number
According to the forwarding of forwarding module 204 shares control data to serial shift module 203, and the serial shift subordinate of serial shift module 203 shows
Registration evidence and shared control data, and forward the data frame for sharing control data and remaining display data composition to be sent to the 2nd
Driving chip；
When the judged result of judge module 201 is no, latch module 202, which is latched, shares control data, and latches described
This grade of display data, remaining display data of the serial shift of serial shift module 203 and shared control data are simultaneously sent to the 2nd drive
Dynamic chip, forwarding module 204 does not perform operation now.
Further, driving chip 20 also includes shaping regeneration module 207, and remaining is shown number by shaping regeneration module 207
The 2nd driving chip is sent to after carrying out shaping regeneration according to the data frame constituted with shared control data.
Further, it is voltage control information, current control information, temperature control information etc. to share control data.
Further, driving chip 20 also includes signal detection module 205 and drive module 206；
When signal detection module 205 detects reset signal (RESET), drive module 206 is adjusted according to shared control data
Electric current, voltage and temperature of whole driving chip etc., and display data feeding LED is shown.
The present invention provides a kind of series connection display system and its data transmission method, is shared during output data identical
Control data, it is only necessary to control data is arranged on to starting position or the end position of transmission data, and transmission 1 is only needed to
Secondary control data, on the basis of train cascade chip number is not reduced, realize the control of tandem drive chip identical
Function, and circuit realiration is simple；When increasing train identical control function, the cost of train, phase are not increased
For the example mentioned in background technology, the display frequency requirement that control system is sent is more than 30 frames, i.e., in order to ensure that LED is aobvious
The problems such as causing to watch uncomfortable will not be flashed by showing, the time of each data frame is not more than 1 second/30=33 milliseconds, it is assumed that series connection
Every chips of display system are required for 1 group of (8) display data and 1 group of (2) control data, the time that each data need
For 1 microsecond, then the maximum chip number that can be cascaded during transmitting display data is 33ms/8us=4125；Series connection display system
System increase identical control function, the maximum chip number now cascaded obtains N for 4214 by 8us*N+2us=33ms, not had
It is reduced train cascade chip number.
Above content is to combine specific application implementation mode further description made for the present invention, it is impossible to assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
Some equivalent substitutes or obvious modification are made on the premise of not departing from present inventive concept, and performance or purposes are identical, all should
It is considered as belonging to the scope of patent protection that the present invention is determined by the claims submitted.
Claims (8)
1. a kind of data transmission method for display system of connecting, the series connection shows that system includes multiple driving chips, Duo Gesuo
The quantity for stating driving chip is n, and n is positive integer, is connected to n-th according to series system step by step since the 1st driving chip
Driving chip；
Characterized in that, the data transmission method includes：
1st driving chip is received shares the data frame that control data is constituted by n groups display data and 1 group；
Since the 1st driving chip, the 1st driving chip extracts its corresponding level from the data frame and shown
Registration evidence and the shared control data, and the data frame of the shared control data and remaining display data composition is sent to
2nd driving chip, is performed to n-th of driving chip successively thus in accordance with the series system step by step；
It is described performed successively to n-th of driving chip according to the series system step by step during, each driving chip
This grade of display data and the shared control data according to corresponding to it control connected LED to be shown；
1st driving chip extracts its corresponding level display data and the shared control data from the data frame
And the data frame for constituting the shared control data and remaining display data is specific the step of be sent to the 2nd driving chip
For：
A. judge whether the shared control data is located at the front portion of the data frame, be, then execution step B, no, then perform step
Rapid C；
B. latch the shared control data and forward the shared control data, latch described level display data, it is serial to move
The position shared control data and remaining described display data are simultaneously sent to the 2nd driving chip；
C. latch the shared control data, and latch described level display data, remaining display data described in serial shift and
The shared control data is simultaneously sent to the 2nd driving chip.
2. data transmission method as claimed in claim 1, it is characterised in that the 1st driving chip is from the data frame
The shared control data is simultaneously shown number by middle its corresponding level display data of extraction and the shared control data with remaining
The step of being sent to the 2nd driving chip according to the data frame of composition also includes：
The data frame that the shared control data and remaining display data are constituted is sent to the 2nd driving after carrying out shaping regeneration
Chip.
3. data transmission method as claimed in claim 1, it is characterised in that the shared control data is that voltage controls letter
Breath, current control information and temperature control information.
4. data transmission method as claimed in claim 3, it is characterised in that each described driving chip is according to corresponding to it
This grade of display data and the shared control data be specially the step of control connected LED to be shown：
When detecting reset signal, electric current, voltage and the temperature of the driving chip are adjusted according to the shared control data
Degree, and display data feeding LED is shown.
5. one kind series connection display system, the series connection shows that system includes multiple driving chips, the number of multiple driving chips
Measure as n, n is positive integer, is connected to n-th of driving chip according to series system step by step since the 1st driving chip, its feature
It is,
1st driving chip is received shares the data frame that control data is constituted by n groups display data and 1 group；
Since the 1st driving chip, the 1st driving chip extracts its corresponding level from the data frame and shown
Registration evidence and the shared control data, and the data frame of the shared control data and remaining display data composition is sent to
2nd driving chip, is performed to n-th of driving chip successively thus in accordance with the series system step by step；
It is described performed successively to n-th of driving chip according to the series system step by step during, each driving chip
This grade of display data and the shared control data according to corresponding to it control connected LED to be shown；
The driving chip includes judge module, latch module, serial shift module and forwarding module；
The judge module is used to receive data frame and judges to share the front portion whether control data is located at the data frame；
When the judged result of the judge module is is, the latch module, which is latched, shares control data, the forwarding module
Forwarding shares control data, and the latch module latches this grade of display data, described in the serial shift module serial shift altogether
With control data and remaining described display data and it is sent to the 2nd driving chip；
When the judged result of the judge module is no, the latch module, which is latched, shares control data, and latches described
Level display data, remaining display data and shared control data described in the serial shift module serial shift are simultaneously sent to the 2nd
Individual driving chip.
6. display system of connecting as claimed in claim 5, it is characterised in that the shared control data is that voltage controls letter
Breath, current control information and temperature control information.
7. display system of connecting as claimed in claim 5, it is characterised in that the driving chip also includes shaping and regenerates mould
Block；
The data frame of remaining display data and the shared control data composition is carried out shaping regeneration by the shaping regeneration module
After be sent to next driving chip.
8. display system of connecting as claimed in claim 5, it is characterised in that the driving chip also includes signal detection module
And drive module；
When the signal detection module detects reset signal, the drive module is according to the shared control data adjustment
Electric current, voltage and the temperature of driving chip, and display data feeding LED is shown.
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| CN105072756A (en) * | 2015-08-03 | 2015-11-18 | 深圳市明微电子股份有限公司 | Light-emitting diode (LED) constant current driving circuit, driving chip and control method of driving chip |
| CN105657905B (en) * | 2016-03-11 | 2017-12-26 | 深圳市明微电子股份有限公司 | A kind of LED drive chip, LED drive circuit and LED display |
| 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 |
| CN105873290B (en) * | 2016-05-31 | 2018-01-23 | 深圳君略科技有限公司 | A kind of LED drive chip and LED drive circuit |
| WO2018006415A1 (en) * | 2016-07-08 | 2018-01-11 | 韩性峰 | Data transmission method |
| WO2018006413A1 (en) * | 2016-07-08 | 2018-01-11 | 韩性峰 | Transmission method without reducing the number of chips connected in cascade in tandem system |
| WO2018006421A1 (en) * | 2016-07-08 | 2018-01-11 | 韩性峰 | Data transmission method for chips connected in series |
| WO2018006410A1 (en) * | 2016-07-08 | 2018-01-11 | 韩性峰 | Method for transmitting same data by chips connected in series |
| WO2018006420A1 (en) * | 2016-07-08 | 2018-01-11 | 韩性峰 | Transmission method for adding identical control function to tandem display system |
| CN106846848A (en) * | 2017-03-03 | 2017-06-13 | 深圳爱克莱特科技股份有限公司 | A kind of urban traffic information control system and method for information display |
| CN108923778A (en) * | 2018-06-22 | 2018-11-30 | 比飞力（深圳）科技有限公司 | A kind of logic level converting circuit and integrated circuit |
| CN111540318B (en) * | 2020-07-10 | 2020-10-23 | 北京显芯科技有限公司 | LED control system, apparatus, method and storage medium |
| CN112419968B (en) * | 2020-11-27 | 2022-05-31 | 杭州海康威视数字技术股份有限公司 | Data display method and display screen |
| CN112799996B (en) * | 2021-02-03 | 2022-04-12 | 长沙锐逸微电子有限公司 | Chip cascade expansion control protocol |
| CN113986166B (en) * | 2021-10-11 | 2023-10-13 | 惠州视维新技术有限公司 | Tiled display control method, tiled display system and computer readable storage medium |
| CN114038404A (en) * | 2021-11-17 | 2022-02-11 | 东莞阿尔泰显示技术有限公司 | Display data distribution method of improved display module |
| CN114495814B (en) * | 2022-03-02 | 2023-05-05 | 深圳市绿源半导体技术有限公司 | LED display transmission system |
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| CN101707042B (en) * | 2009-07-20 | 2012-09-26 | 深圳市天微电子有限公司 | Coding and data storing, regenerating and forwarding technology used for single-wire cascade data communication |
| TW201108186A (en) * | 2009-08-20 | 2011-03-01 | Ene Technology Inc | LED display system and related control method |
| CN202276524U (en) * | 2011-10-24 | 2012-06-13 | 深圳市天微电子有限公司 | LED (light-emitting diode) multistage drive circuit |
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