CN104517569A - Series-connection display system and data transmission method thereof - Google Patents
Series-connection display system and data transmission method thereof Download PDFInfo
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Abstract
The invention relates to the technical field of LED lamp control and provides a series-connection display system and a data transmission method thereof. The data transmission method includes that a first driving chip receives a data frame formed by n groups of display data and one group of shared control data; starting from the first driving chip, the first driving chip extracts the display data and the shared control data at the corresponding level and corresponding to the first driving chip from the data frame, a data frame formed by the shared control data and the rest display data is sent to a second driving chip, and execution till an nth driving chip is performed sequentially according to a level-to-level series connection mode; in the process of sequentially executing till the nth driving chip according to the level-to-level series connection mode, each driving chip controls an LED lamp connected with the corresponding driving chip for display according to the display data and the shared control data at the corresponding level and corresponding to each driving chip. the control data which are identical are used, and the control data need to be transmitted for only once, so that identical control functions of series-connection driving chips are realized on the basis that number of cascaded chips of a series-connection system is not reduced.
Description
Technical field
The present invention relates to LED control technology field, particularly relate to a kind of series connection display system and data transmission method thereof.
Background technology
At present, the series chip of display system of connecting in prior art is connected in series step by step, as depicted in figs. 1 and 2, the display data that series chip reads are transmitted step by step to rear stage series chip by previous stage series chip, namely when N level series chip receives the data stream of N-1 level series 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 device of N+1 level series chip.When needs increase controlling functions, need to increase control data while transmission display data, as shown in Figure 3, the display data of each series chip increase by one group of control data, also need for each series chip sends one group of control data even if control data is identical.Be exemplified below, the display frequency that control system sends requires to be greater than 30 frames, and cause watching the problems such as uncomfortable to ensure that LED display can not be glimmered, namely the time of each Frame is not more than 1 second/30=33 millisecond; Suppose that every chips of series connection display system all needs 1 group (8) to show data and 1 group of (2) control data, the time that each data need is 1 microsecond, then can the maximum chip number of cascade be 33ms/8us=4125 during transmitting display data; Series connection display system increases identical controlling functions, the schematic diagram of the driving chip reading displayed in display system of connecting in prior art as shown in Figure 3 and control data, a maximum chip number of now cascade is 33ms/ (8+2) us=3300, decreases a maximum chip number of cascade; Therefore the quantity reducing series chip is usually needed as shown in Figure 3 in prior art, to ensure display effect.In sum, the series chip existed in prior art in series connection display system needs the problem of the quantity reducing series chip when transmitting control data.
Summary of the invention
The object of the present invention is to provide a kind of series connection display system and data transmission method thereof, be intended to solve the problem needing the quantity reducing series chip for the series chip existed in prior art in series connection display system when transmitting control data.
The present invention realizes like this, a data transmission method for display system of connecting, described series connection display system comprises multiple driving chip, and the quantity of multiple described driving chip is n, n is positive integer, from the 1st driving chip, be connected to the n-th driving chip according to series system step by step;
Described data transmission method comprises:
Described 1st driving chip receives and shows data and 1 group of Frame sharing control data and form by n group;
From described 1st driving chip, described 1st driving chip extracts the corresponding levels display data of its correspondence and described shared control data from described Frame, and give the 2nd driving chip by the dataframe of described shared control data and all the other display data compositions, perform to the n-th driving chip successively according to described series system step by step thus;
Perform in the process of the n-th driving chip described successively according to described series system step by step, the corresponding levels display data of each driving chip corresponding to it and described shared control data control connected LED and show.
Described 1st driving chip extracts the corresponding levels display data of its correspondence and described shared control data and is specially to the step of the 2nd driving chip by the dataframe of described shared control data and all the other display data compositions from described Frame:
A. judge whether described shared control data is positioned at the front portion of described Frame, is, then perform step B, no, then perform step C;
B. latch described shared control data and forward described shared control data, latching described corresponding levels display data, shared control data described in serial-shift and all the other display Data Concurrents described give the 2nd driving chip;
C. latch described shared control data, and latch described corresponding levels display data, all the other display data and described shared control datas send to the 2nd driving chip described in serial-shift.
Described 1st driving chip extracts the corresponding levels display data of its correspondence and described shared control data and is also comprised to the step of the 2nd driving chip by the dataframe of described shared control data and all the other display data compositions from described Frame:
The 2nd driving chip is sent to after the Frame that described shared control data and all the other display data form is carried out shaping regeneration.
Described shared control data is Control of Voltage information, current control information, temperature control information etc.
The corresponding levels display data of each driving chip described corresponding to it and described shared control data control the step that connected LED carries out showing and are specially:
When reset signal (RESET) being detected, adjust the electric current of described driving chip, voltage and temperature according to described shared control data, and described display data are sent into LED show.
The present invention also provides a kind of series connection display system, and described series connection display system comprises multiple driving chip, and the quantity of multiple described driving chip is n, n is positive integer, from the 1st driving chip, be connected to the n-th driving chip according to series system step by step,
Described 1st driving chip receives and shows data and 1 group of Frame sharing control data and form by n group;
From described 1st driving chip, described 1st driving chip extracts the corresponding levels display data of its correspondence and described shared control data from described Frame, and give the 2nd driving chip by the dataframe of described shared control data and all the other display data compositions, perform to the n-th driving chip successively according to described series system step by step thus;
Perform in the process of the n-th driving chip described successively according to described series system step by step, the corresponding levels display data of each driving chip corresponding to it and described shared control data control connected LED and show.
Described shared control data is Control of Voltage information, current control information and temperature control information.
Described driving chip comprises judge module, latch module, serial-shift module and forwarding module;
Judge module for judging whether shared control data is positioned at the front portion of Frame, and receives data;
When the judged result of judge module is for being, described latch module latches and shares control data, described forwarding module forwards and shares control data, described latch module latches display data at the corresponding levels, and shared control data described in described serial-shift module serial-shift and all the other display Data Concurrents described give the 2nd driving chip;
When the judged result of judge module is no, described latch module latches and shares control data, and latches described corresponding levels display data, and all the other display data described in described serial-shift module serial-shift and shared control data also send to the 2nd driving chip.
Described driving chip also comprises shaping regeneration module;
Described shaping regeneration module sends to the 2nd driving chip after the Frame that described shared control data and all the other display data form is carried out shaping regeneration.
Described driving chip also comprises signal detection module and driver module;
When described signal detection module detects reset signal, described driver module adjusts the electric current of described driving chip, voltage and temperature according to described shared control data, and described display data are sent into LED shows.
The invention provides a kind of series connection display system and data transmission method thereof, in the process exporting data, make driving chip share identical control data, only need the starting position or the end position that control data are arranged on transmission data, and only need transmission 1 control data, on the basis of not reducing a cascade system cascade chip number, achieve the controlling functions that the driving chip of series connection is identical, and circuit realiration is simple, when the controlling functions that increase cascade system is identical, do not increase the cost of cascade system, relative to the example mentioned in background technology, the display frequency that control system sends requires to be greater than 30 frames, namely cause watching the problems such as uncomfortable to ensure that LED display can not be glimmered, the time of each Frame is not more than 1 second/30=33 millisecond, suppose that every chips of series connection display system all needs 1 group (8) to show data and 1 group of (2) control data, the time that each data need is 1 microsecond, can the maximum chip number of cascade be then 33ms/8us=4125 during transmitting display data, series connection display system increases identical controlling functions, and it is 4214 that a maximum chip number of now cascade obtains N by 8us*N+2us=33ms, does not reduce a cascade system cascade chip number.
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 series connection display system;
Fig. 2 is the schematic diagram of the driving chip reading displayed data of connecting in prior art in display system;
Fig. 3 is the schematic diagram of driving chip reading displayed in display system and control data of connecting in prior art;
Fig. 4 is the process flow diagram of the data transmission method of a kind of display system of connecting provided by the invention;
Fig. 5 is the schematic diagram of a kind of connect display system reading displayed and control data provided by the invention;
Fig. 6 is the schematic diagram of another kind series connection display system reading displayed provided by the invention and control data;
Fig. 7 is a kind of series chip inner structure schematic diagram provided by the 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 data transmission method of a kind of display system of connecting of the present invention, as shown in Figure 4, series connection display system comprises multiple driving chip, and the quantity of multiple driving chip is n, n is positive integer, from the 1st driving chip, be connected to the n-th driving chip according to series system step by step;
The data transmission method of this series connection display system comprises:
Step S101. the 1st driving chip receives and shows data and 1 group of Frame sharing control data and form by n group.
In the present embodiment, concrete, as shown in Figure 5 and Figure 6, shared control data can be positioned at before display data, also can be positioned at after display data, i.e. Frame a kind of form order for share control data, driving chip at the corresponding levels display according to this and the display data of follow-up all driving chip, or the another kind composition order of Frame be the display data of driving chip at the corresponding levels, follow-up all driving chip display according to this and shared control data.
In the present embodiment, concrete, shared control data is Control of Voltage information, current control information, temperature control information etc.
Step S102. is from the 1st driving chip, 1st driving chip extracts corresponding corresponding levels display data and shared control data from Frame, and give the 2nd driving chip by the dataframe of shared control data and all the other display data compositions, perform successively to the n-th driving chip according to series system step by step thus.
In the present embodiment, the 1st driving chip extracts corresponding corresponding levels display data and shared control data from Frame, and gives the 2nd driving chip by the dataframe of shared control data and all the other display data compositions; 2nd driving chip extracts corresponding corresponding levels display data and shared control data from Frame, and gives the 3rd driving chip, until perform successively to the n-th driving chip by the dataframe of shared control data and all the other display data and composition.
In the present embodiment, because in step S101, control data can be positioned at before display data, also can be positioned at after display data, therefore need when the display data extracting driving chip at the corresponding levels and shared control data the position judging control data, step S102 is specially:
Step S1021. judges to share the front portion whether control data is positioned at Frame, is then perform step S1022; No, then perform step S1023.Step S1022. latches to share control data and forward and shares control data, latches display data at the corresponding levels, and serial-shift shares control data and all the other display Data Concurrents give the 2nd driving chip;
Step S1023. latches and shares control data, and latches display data at the corresponding levels, and all the other display data of serial-shift and shared control data also send to the 2nd driving chip.
Further, step S102 also comprises:
Step S1024. sends to the 2nd driving chip after the Frame that shared control data and all the other display data form is carried out shaping regeneration.
Step S103. is performing in the process of the n-th driving chip according to series system step by step successively, and the corresponding levels display data of each driving chip corresponding to it and shared control data control connected LED and show.
In the present embodiment, concrete, performing in the process of the n-th driving chip successively, when reset signal being detected according to series system step by step, according to the electric current of the control data adjustment tandem drive chip shared, voltage and temperature etc., and display data feeding LED is shown.
The present invention's one series connection display system, as shown in Figure 1, series connection display system comprises multiple driving chip, and the quantity of multiple driving chip is n, n is positive integer, from the 1st driving chip, be connected to the n-th driving chip according to series system step by step;
1st driving chip receives and shows data and 1 group of Frame sharing control data and form by n group;
From the 1st driving chip, 1st driving chip extracts the corresponding levels display data of its correspondence and shared control data from Frame, and give the 2nd driving chip by the dataframe of shared control data and all the other display data compositions, perform to the n-th driving chip successively according to series system step by step thus;
Performing in the process of the n-th driving chip successively according to series system step by step, the corresponding levels display data of each driving chip corresponding to it and shared control data control connected LED and show.
Further description, as shown in Figure 7, driving chip 20 comprises judge module 201, latch module 202, serial-shift module 203 and forwarding module 204;
Judge module 201 is for receiving data frames and judgement shares the front portion whether control data is positioned at Frame;
When the judged result of judge module 201 is for being, latch module 202 latches and shares control data and display data at the corresponding levels, forwarding module 204 forwards and shares control data to serial-shift module 203, serial-shift module 203 serial-shift subordinate display data and shared control data, and forwarding shares the dataframe of control data and all the other display data compositions to the 2nd driving chip;
When the judged result of judge module 201 is no, latch module 202 latches and shares control data, and latch described corresponding levels display data, serial-shift module 203 serial-shift all the other display data and shared control datas send to the 2nd driving chip, forwarding module 204 now undo.
Further, driving chip 20 also comprises shaping regeneration module 207, and shaping regeneration module 207 sends to the 2nd driving chip after the Frame that all the other display data and shared control data form is carried out shaping regeneration.
Further, shared control data is Control of Voltage information, current control information, temperature control information etc.
Further, driving chip 20 also comprises signal detection module 205 and driver module 206;
When signal detection module 205 detects reset signal (RESET), display data feeding LED according to the electric current of shared control data adjustment driving chip, voltage and temperature etc., and shows by driver module 206.
The invention provides a kind of series connection display system and data transmission method thereof, identical control data is shared in the process exporting data, only need the starting position or the end position that control data are arranged on transmission data, and only need transmission 1 control data, on the basis of not reducing a cascade system cascade chip number, achieve the controlling functions that tandem drive chip is identical, and circuit realiration is simple, when the controlling functions that increase cascade system is identical, do not increase the cost of cascade system, relative to the example mentioned in background technology, the display frequency that control system sends requires to be greater than 30 frames, namely cause watching the problems such as uncomfortable to ensure that LED display can not be glimmered, the time of each Frame is not more than 1 second/30=33 millisecond, suppose that every chips of series connection display system all needs 1 group (8) to show data and 1 group of (2) control data, the time that each data need is 1 microsecond, can the maximum chip number of cascade be then 33ms/8us=4125 during transmitting display data, series connection display system increases identical controlling functions, and it is 4214 that a maximum chip number of now cascade obtains N by 8us*N+2us=33ms, does not reduce a cascade system cascade chip number.
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 data transmission method for display system of connecting, described series connection display system comprises multiple driving chip, and the quantity of multiple described driving chip is n, n is positive integer, from the 1st driving chip, be connected to the n-th driving chip according to series system step by step;
It is characterized in that, described data transmission method comprises:
Described 1st driving chip receives and shows data and 1 group of Frame sharing control data and form by n group;
From described 1st driving chip, described 1st driving chip extracts the corresponding levels display data of its correspondence and described shared control data from described Frame, and give the 2nd driving chip by the dataframe of described shared control data and all the other display data compositions, perform to the n-th driving chip successively according to described series system step by step thus;
Perform in the process of the n-th driving chip described successively according to described series system step by step, the corresponding levels display data of each driving chip corresponding to it and described shared control data control connected LED and show.
2. data transmission method as claimed in claim 1, it is characterized in that, described 1st driving chip extracts the corresponding levels display data of its correspondence and described shared control data and is specially to the step of the 2nd driving chip by the dataframe of described shared control data and all the other display data compositions from described Frame:
A. judge whether described shared control data is positioned at the front portion of described Frame, is, then perform step B, no, then perform step C;
B. latch described shared control data and forward described shared control data, latching described corresponding levels display data, shared control data described in serial-shift and all the other display Data Concurrents described give the 2nd driving chip;
C. latch described shared control data, and latch described corresponding levels display data, all the other display data and described shared control datas send to the 2nd driving chip described in serial-shift.
3. data transmission method as claimed in claim 2, it is characterized in that, described 1st driving chip extracts the corresponding levels display data of its correspondence and described shared control data and is also comprised to the step of the 2nd driving chip by the dataframe of described shared control data and all the other display data compositions from described Frame:
The 2nd driving chip is sent to after the Frame that described shared control data and all the other display data form is carried out shaping regeneration.
4. data transmission method as claimed in claim 1, it is characterized in that, described shared control data is Control of Voltage information, current control information and temperature control information.
5. data transmission method as claimed in claim 4, is characterized in that, the corresponding levels display data of each driving chip described corresponding to it and described shared control data control the step that connected LED carries out showing and be specially:
When reset signal being detected, adjust the electric current of described driving chip, voltage and temperature according to described shared control data, and described display data are sent into LED show.
6. connect a display system, described series connection display system comprises multiple driving chip, and the quantity of multiple described driving chip is n, n is positive integer, is connected to the n-th driving chip, it is characterized in that from the 1st driving chip according to series system step by step,
Described 1st driving chip receives and shows data and 1 group of Frame sharing control data and form by n group;
From described 1st driving chip, described 1st driving chip extracts the corresponding levels display data of its correspondence and described shared control data from described Frame, and give the 2nd driving chip by the dataframe of described shared control data and all the other display data compositions, perform to the n-th driving chip successively according to described series system step by step thus;
Perform in the process of the n-th driving chip described successively according to described series system step by step, the corresponding levels display data of each driving chip corresponding to it and described shared control data control connected LED and show.
7. connect as claimed in claim 6 display system, it is characterized in that, described shared control data is Control of Voltage information, current control information and temperature control information.
8. connect as claimed in claim 6 display system, it is characterized in that, described driving chip comprises judge module, latch module, serial-shift module and forwarding module;
Described judge module is used for receiving data frames and judges to share the front portion whether control data is positioned at described Frame;
When the judged result of described judge module is for being, described latch module latches and shares control data, described forwarding module forwards and shares control data, described latch module latches display data at the corresponding levels, and shared control data described in described serial-shift module serial-shift and all the other display Data Concurrents described give the 2nd driving chip;
When the judged result of described judge module is no, described latch module latches and shares control data, and latch described corresponding levels display data, all the other display data and shared control datas send to the 2nd driving chip described in described serial-shift module serial-shift.
9. connect as claimed in claim 6 display system, it is characterized in that, described driving chip also comprises shaping regeneration module;
Described shaping regeneration module sends to next driving chip after the Frame that all the other display data and described shared control data form is carried out shaping regeneration.
10. connect as claimed in claim 6 display system, it is characterized in that, described driving chip also comprises signal detection module and driver module;
When described signal detection module detects reset signal, described driver module adjusts the electric current of described driving chip, voltage and temperature according to described shared control data, and described display data are sent into LED shows.
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| 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 |
| WO2018006420A1 (en) * | 2016-07-08 | 2018-01-11 | 韩性峰 | Transmission method for adding identical control function to tandem display system |
| 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 |
| 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 |
| WO2022007159A1 (en) * | 2020-07-10 | 2022-01-13 | 北京显芯科技有限公司 | Led control system, device, method, and storage medium |
| CN112419968A (en) * | 2020-11-27 | 2021-02-26 | 杭州海康威视数字技术股份有限公司 | Data display method and display screen |
| CN112799996A (en) * | 2021-02-03 | 2021-05-14 | 长沙锐逸微电子有限公司 | Chip cascade expansion control protocol |
| CN112799996B (en) * | 2021-02-03 | 2022-04-12 | 长沙锐逸微电子有限公司 | Chip cascade expansion control protocol |
| CN113986166A (en) * | 2021-10-11 | 2022-01-28 | 惠州视维新技术有限公司 | Tiled display control method, tiled display system and computer-readable storage medium |
| 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 |
| CN114495814A (en) * | 2022-03-02 | 2022-05-13 | 深圳市绿源半导体技术有限公司 | LED display transmission system |
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