CN101969721B - Dual-wire data transmission method and device thereof - Google Patents
Dual-wire data transmission method and device thereof Download PDFInfo
- Publication number
- CN101969721B CN101969721B CN2010102869564A CN201010286956A CN101969721B CN 101969721 B CN101969721 B CN 101969721B CN 2010102869564 A CN2010102869564 A CN 2010102869564A CN 201010286956 A CN201010286956 A CN 201010286956A CN 101969721 B CN101969721 B CN 101969721B
- Authority
- CN
- China
- Prior art keywords
- data
- signal
- clock
- transmission device
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Landscapes
- Control Of El Displays (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The embodiment of the invention provides a dual-wire data transmission method which comprises the following steps: when an excitation signal of a clock enters a data transmission device, the data transmission device starts counting, receives an input data signal and drives an LED lamp for display control according to the data signal; and when the counting value of the data transmission device reaches a preset threshold value, the data transmission device outputs the input clock signal and the data signal. The embodiment of the invention further provides the dual-wire data transmission device. Relative to the existing dual-wire transport protocol by the mode of slaves in series, the technical scheme provided by the invention has higher data updating rate without sending and displaying irrelevant data. In addition, the technical scheme provided by the invention is simple and efficient and has high practical value.
Description
Technical field
The present invention relates to digital communicating field, particularly, the present invention relates to method and the device of two-wire transfer of data.
Background technology
In order to make the display application materials such as LED demonstrate different brightness, obtain the abundant constantly color of change, need to control the display brightness of LED lamp.The control of brightness is normally passed through LED drive unit data writing is realized.Traditional transfer of data, the single-wire-protocol that following classification: MAXIM is arranged that is widely known by the people, DMX512 single-wire-protocol, IIC two-wire agreement, SMBUS two-wire agreement, three wire protocols that use in the display screen etc.
In the single-wire-protocol, transfer of data only needs a line, has saved cost, but inadequate natural endowment is, its transmission rate is low, the highlyest only can reach 800KHz, even the single-wire-protocol with Manchester's code that recent development goes out in the industry can not reach the transmission rate of tens of megahertzes; More general in the display screen, be the usage data line, clock line latchs the line agreement of totally three lines.Because the display screen matrix dot spacing is little, and use the printed circuit board line in the case, minimizing transfer of data number of lines be it seems and be there is no need, and become in the industry standard.
For point-source of light, the spacing between pixel is larger, generally reaches more than 20 centimetres.The advantage of Double wire transmission is that transmission rate can reach tens of megahertzes, can the more LED of cascade with two line transmission.Therefore, when dot spacing was larger, Double wire transmission was the best trade-off of data wire number and transmission rate.
Above-mentioned traditional two-wire agreement, such as IIC, SMBUS etc. are the modes that adopts the slave parallel connection.Connected mode as shown in Figure 1.Main frame tranmitting data register (CLOCK) and data (DATA), all slaves all hang on these two lines.This is to adopt the mode of sharing addressing.All there is one to one relation the corresponding fixing address of each slave, each data that send with the address.Like this, in application, if some slave losses, and do not have influence in the situation of main frame transmission data, all the other slaves can not be affected.But this method has following shortcoming: 1, need to set different addresses (ID) to each slave, and need to still can preserve the address after power down, this just needs such as non-volatile storage mediums such as EPROM.When changing slave, the address be need to reset in addition, manufacturing cost and maintenance cost increased; 2, because in display application, the quantity of slave is more, for example 512, dead resistance and the electric capacity of load are larger, and two lines that need like this main frame to be used for tranmitting data register and data have enough driving forces, certainly, correct position on line, increase the strong driving element of driving force, that the cascade of line can be done is better, but has so also increased the thrashing probability.
Present demonstration field, Double wire transmission more adopts the mode of slave series connection.Connected mode as shown in Figure 2.This mode is to utilize the proper sequence relation of slave series connection, and indicates data intercept by a data intercept signal, stores in the slave, in order to the brightness of control display material.The advantage of this mode is as follows: 1, can be with the cascade data shaping, and subordinate's slave can receive more satisfactory signal, like this, in theory can cascade quantity only depends on the refreshing frequency of demonstration; 2, agreement control can be fairly simple, reduced the cost of system; 3, because there is not bus to connect, so economize with line.
In existing slave series connection Double wire transmission agreement, for example, employing be the false address mode that distributes, need to know in advance the number of slave in each lamp bar, the foundation when sending data as main frame has increased the cost of system debug.Another needs first of the data of each slave to be necessary for the two-wire agreement of stationary state, and each slave also needs extra indicating bit except receiving desired data.
Particularly, adopt the input data of false distribution address mode as shown in Figure 3, after slave powered on, slave was waited for the beginning code that main frame sends over, and comprised the number of slave in the beginning code.Slave receives after the beginning code, store, and every through after the slave data volume, and the beginning code slave number that stores in the slave subtracts 1, and when the beginning code that forwarding receives, what transfer out is that the beginning code slave number that receives subtracts 1 beginning code.Like this, the transmission of beginning code is gone down, and after the beginning code was sent to last slave, the slave of all a slave inside counter had all been counted fixed amount, for example full 0.All slave latch datas at this time.And, wait for the appearance of beginning code, receive next time data.This two-wire system need to be known the number of slave in each lamp bar in advance, and the foundation when sending data as main frame, has increased the cost of system debug.And loaded down with trivial details beginning code is arranged, as comprise slave number, instruction etc., increased invalid data.
The input data of another host-host protocol as shown in Figure 4, slaver represents slave, such as the needed data bit N of each slave position, so according to this agreement, need to send N+1 clock, additional 1 clock wherein is should before the machine data, need to send an identification data 1 each the transmission.Like this, it can be with N+1 data 0 as the beginning code.After receiving N+1 data 0, slave is carried out the preparation of accepting data.When receiving again an identification data 1, think that follow-up data are the needed data of this slave, after the data of N+1 clock of reception, this slave is opened data wire, and follow-up like this data can pass in the next stage slave.This mode, each slave also need extra indicating bit except receiving desired data, increased the quantity of transfer of data, can reduce the Refresh Data rate.
In the existing Double wire transmission method, all need to send and the data that show data independence.Therefore be necessary to propose a kind of effective technical scheme, realize showing efficiently the data Double wire transmission.
Summary of the invention
Purpose of the present invention is intended to solve at least one of above-mentioned technological deficiency, particularly by under the prerequisite that does not affect the Refresh Data rate, the useful data of data transmission device intercepting show control, need not to send and the data that show data independence, Double wire transmission agreement with respect to existing slave series connection has higher Data Update speed.
In order to achieve the above object, embodiments of the invention have proposed a kind of method of two-wire transfer of data on the one hand, may further comprise the steps:
When the pumping signal of clock entered data transmission device, described data transmission device began counting, and simultaneously described data transmission device receives the data-signal of input, shows control according to described data-signal driving LED lamp;
When described data transmission device counting reached predetermined threshold, described data transmission device was with clock signal and the data-signal output of input.
Embodiments of the invention have also proposed a kind of device of two-wire transfer of data on the other hand, comprise receiver module, counting module and driver module,
Described receiver module is used for receiving clock signal and the data-signal of inputting;
Described counting module be used for beginning counting when the pumping signal of clock enters described receiver module, and described driver module shows control according to described data-signal driving LED lamp;
When described counting module counting reached predetermined threshold, described receiver module was with clock signal and the data-signal output of input.
The such scheme that the present invention proposes, by under the prerequisite that does not affect the Refresh Data rate, the useful data of data transmission device intercepting show control, need not to send and the data that show data independence, Double wire transmission agreement with respect to existing slave series connection has higher Data Update speed.In addition, the such scheme that the present invention proposes implements simply, efficient, has very high practical value.
The aspect that the present invention adds and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or the additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is that traditional two-wire adopts slave parallel way schematic diagram;
Fig. 2 is that Double wire transmission adopts slave series system schematic diagram;
Fig. 3 is for comprising the schematic diagram of slave number input data in the beginning code;
Fig. 4 is the schematic diagram that need to add identification data 1 between each data;
Fig. 5 is the schematic diagram that slave intercepts one's own data and clock;
Fig. 6 is the method flow diagram of embodiment of the invention two-wire transfer of data;
Fig. 7 is the structural representation of the device of embodiment of the invention two-wire transfer of data;
Fig. 8 is embodiment of the invention circuit theory schematic diagram;
Fig. 9 is the clock of main frame transmission and the waveform schematic diagram of data-signal.
Embodiment
The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein identical or similar label represents identical or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.
The invention provides the method and apparatus of avoiding sending with the two-wire transfer of data of the data that show data independence.Its invention essence is as follows: keep fixing level on the clock line after a period of time, then think the data that the data that are right after should receive as this slave.Each slave intercepts clock get off in accepting the process of data, and the clock line of rear like this one-level slave still is maintained fixed level.After this slave has been accepted data, with follow-up clock output, as the clock of rear one-level slave.What like this, slave was received all is valid data.The schematic diagram that slave intercepts one's own data and clock as shown in Figure 5.
Purpose for real the present invention, the present invention proposes a kind of method of two-wire transfer of data, may further comprise the steps: when the pumping signal of clock enters data transmission device, described data transmission device begins counting, simultaneously described data transmission device receives the data-signal of input, shows control according to described data-signal driving LED lamp; When described data transmission device counting reached predetermined threshold, described data transmission device was with clock signal and the data-signal output of input.
In the follow-up embodiment of the present invention, data transmission device also is called for short slave namely from machine equipment.
Particularly, Fig. 6 is the method flow diagram of embodiment of the invention two-wire transfer of data.
After slave powers on, all wait the arriving of pending data, and close clock output.
Particularly, the pumping signal of clock comprises: the time that clock signal is kept fixed level is predetermined threshold Tset sudden change clock edge afterwards.The below keeps fixing low level as example explanation the present invention take clock signal, and at this moment, the pumping signal of clock is specially clock signal and keeps after the fixing low level and have a rising edge to arrive on the clock line.Obviously, to keep the trailing edge after the fixing high level be that the clock drive signal is applicable equally to the present invention to clock signal.
There have a rising edge on the clock line of slave to be interim, just meaned that this slave begins receive data.
After slave began counting, the time that clock signal is kept fixed level, slave stopped the clock signal of input to export with data-signal when surpassing predetermined threshold Tset.If after namely the rising edge of the clock of slave arrives, kept a fixed level, when having surpassed a default time T set, slave need to wait pending data again with regard to thinking again so.
Wait until first rising edge of clock when slave after, the slave internal counter begins counting, if before not obtaining the required partial data of this slave, the output clock line of slave and data wire keep fixing level, namely close output; If after obtaining the required partial data of this slave, the output of opening again this slave is used for next slave.
Thereafter, slave utilizes data-signal driving LED lamp to show control, comprising:
The serial data of data-signal is converted to parallel data, and parallel data is by the brightness of LED control port control LED.
Particularly, parallel data comprises by the brightness of LED control port control LED:
Parallel data is stored in the ram cell, thereafter the demonstration data in the ram cell is inputted the PWM module for generation of pwm signal, by the pwm signal driving LED, the duty ratio of also namely indicating according to data-signal shows.
As shown in Figure 7, the structural representation for the device of embodiment of the invention two-wire transfer of data comprises receiver module 20, counting module 10 and driver module 30.
Particularly, cooperating is as follows between the modules:
When counting module 10 countings reached predetermined threshold, receiver module 20 was with clock signal and the data-signal output of input.
Wherein, the pumping signal of clock comprises:
The time that clock signal is kept fixed level is predetermined threshold Tset sudden change clock edge afterwards.
Particularly, the pumping signal of clock comprises: the time that clock signal is kept fixed level is predetermined threshold Tset sudden change clock edge afterwards.The below keeps fixing low level as example explanation the present invention take clock signal, and at this moment, the pumping signal of clock is specially clock signal and keeps after the fixing low level and have a rising edge to arrive on the clock line.Obviously, to keep the trailing edge after the fixing high level be that the clock drive signal is applicable equally to the present invention to clock signal.
Wherein, after counting module 10 began counting, the time that clock signal is kept fixed level, receiver module 20 stopped the clock signal of input to export with data-signal when surpassing predetermined threshold Tset.
If after namely the rising edge of the clock of receiver module 20 arrives, kept a fixed level, when having surpassed a default time T set, receiver module 20 need to wait pending data again with regard to thinking again so.
Wherein, show that according to data-signal driving LED lamp control comprises:
Wherein, parallel data comprises by the brightness of LED control port control LED:
Parallel data is stored in the ram cell, and the input of the demonstration data in ram cell PWM module for generation of pwm signal, is shown by the duty ratio of pwm signal driving LED according to the data-signal indication.
For the ease of understanding the present invention, below in conjunction with concrete application scenarios, in conjunction with concrete realization circuit, the above-mentioned disclosed method of the present invention or device are described further.
For example, 512 slaves are arranged as example take a lamp bar, each slave drives three LED lamps of RGB, and the data bits of each lamp is 8.
Fig. 8 is embodiment of the invention circuit theory schematic diagram.
Deserializer is for the serial data on the data wire is converted to parallel data, for the brightness of LED control port control LED.Driving and switch module are used for closing or opening clock line output, and strengthen driving, so that the next stage slave receives more preferably signal.Counter 1 is for the data that receive are counted, and in the present embodiment, when data meter to 24, clock line is outputed to next stage.Oscillator is the inner generation of slave, and the cycle that can produce is not very accurate square wave.Counter 2 is after keeping fixed level on the clock line, frequency to oscillator is counted, if know that by counting the time of keeping fixed level on the clock line surpassed preset value Tset, so just allow slave prepare next time receive data, and close clock output.Ram cell is that storage shows data, and counter 3 and PWM module are for generation of pwm signal, is used for the driving LED lamp according to the duty ratio light on and off shown in the data, obtains the brightness that data characterize.Particularly, ram cell is used for the storage gradation data, and counter 3 is fixing counter of cycle.The PWM module is according to the count value of the gradation data sum counter 3 of ram cell storage, the duty ratio that output is associated with gradation data.For example, the PWM module can be digital comparator, is used for the gradation data of comparison ram cell storage and the value of counter 3, if gradation data greater than the output of counter 3, the output of PWM module is 1 just, and the LED lamp is lighted, otherwise closes the LED lamp.In addition, the PWM module also can be the progressively decreasing apparatus take gradation data as starting point, can realize the brightness that gradation data characterizes equally.
Fig. 9 is clock and the waveform schematic diagram of data-signal, the namely input signal of data transmission device or slave that main frame sends.In each frame clock interval, need to keep clock and reach preset value Tset for fixing low level time.
Main frame is when sending data, and the data of each frame have 8*3*512=12288 data.Be that each frame need to send 12288 clocks.Between each frame, clock line need to be kept fixed level, and high level or low level reach the time of Tset.
After powering on, all slaves have been carried out the preparation of receive data, and close clock output.Main frame tranmitting data register and data, first slave begins receive data and clock, and this moment, the clock of this slave was output as fixed level, for example was fixing low level.At this moment, the clock of remaining slave is input as fixing level, namely can not accept data.After first slave is received 8*3=24 data, the clock output of this slave to be opened, second slave begins receive data.After second slave received 8*3=24 data, the clock output of this slave to be opened, the 3rd slave begins receive data.And so forth, until all slaves are received data.
Main frame sends after 12288 data and the clock, and clock line is kept the fixed level of a period of time, during this period of time should be greater than Tset.
Then send according to this next frame data.
The such scheme that the present invention proposes, by under the prerequisite that does not affect the Refresh Data rate, the useful data of data transmission device intercepting show control, need not to send and the data that show data independence, Double wire transmission agreement with respect to existing slave series connection has higher Data Update speed.In addition, the such scheme that the present invention proposes implements simply, efficient, has very high practical value.
One of ordinary skill in the art will appreciate that and realize that all or part of step that above-described embodiment method is carried is to come the relevant hardware of instruction to finish by program, described program can be stored in a kind of computer-readable recording medium, this program comprises step of embodiment of the method one or a combination set of when carrying out.
In addition, each functional unit in each embodiment of the present invention can be integrated in the processing module, also can be that the independent physics of unit exists, and also can be integrated in the module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, also can adopt the form of software function module to realize.If described integrated module realizes with the form of software function module and during as independently production marketing or use, also can be stored in the computer read/write memory medium.
The above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.
The above only is embodiments of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. the method for a two-wire transfer of data is characterized in that, may further comprise the steps:
When the pumping signal of clock entered data transmission device, described data transmission device began counting, and simultaneously described data transmission device receives the data-signal of input, shows control according to described data-signal driving LED lamp;
When described data transmission device counting reached predetermined threshold, described data transmission device was with clock signal and the data-signal output of input;
Wherein, the pumping signal of described clock comprises: the time that clock signal is kept fixed level is predetermined threshold Tset sudden change clock edge afterwards; After described data transmission device began counting, the time that described clock signal is kept fixed level, described data transmission device stopped the clock signal of input to export with data-signal when surpassing described predetermined threshold Tset.
2. the method for claim 1 is characterized in that, shows that according to described data-signal driving LED lamp control comprises:
The serial data of described data-signal is converted to parallel data, and described parallel data is by the brightness of LED control port control LED.
3. method as claimed in claim 2 is characterized in that, described parallel data comprises by the brightness of LED control port control LED:
Described parallel data is stored in the ram cell, and the input of the demonstration data in described ram cell PWM module for generation of pwm signal, is shown by the duty ratio of described pwm signal driving LED according to described data-signal indication.
4. the device of a two-wire transfer of data is characterized in that, comprises receiver module, counting module and driver module,
Described receiver module is used for receiving clock signal and the data-signal of inputting;
Described counting module be used for beginning counting when the pumping signal of clock enters described receiver module, and described driver module shows control according to described data-signal driving LED lamp;
When described counting module counting reached predetermined threshold, described receiver module was with clock signal and the data-signal output of input;
Wherein, the pumping signal of described clock comprises: the time that clock signal is kept fixed level is predetermined threshold Tset sudden change clock edge afterwards; After described counting module began counting, the time that described clock signal is kept fixed level, described receiver module stopped the clock signal of input to export with data-signal when surpassing described predetermined threshold Tset.
5. device as claimed in claim 4 is characterized in that, shows that according to described data-signal driving LED lamp control comprises:
Described driver module is converted to parallel data with the serial data of described data-signal, and described driver module utilizes described parallel data by the brightness of LED control port control LED.
6. device as claimed in claim 5 is characterized in that, described parallel data comprises by the brightness of LED control port control LED:
Described parallel data is stored in the ram cell, and the input of the demonstration data in described ram cell PWM module for generation of pwm signal, is shown by the duty ratio of described pwm signal driving LED according to described data-signal indication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102869564A CN101969721B (en) | 2010-09-16 | 2010-09-16 | Dual-wire data transmission method and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102869564A CN101969721B (en) | 2010-09-16 | 2010-09-16 | Dual-wire data transmission method and device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101969721A CN101969721A (en) | 2011-02-09 |
| CN101969721B true CN101969721B (en) | 2013-04-17 |
Family
ID=43548774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102869564A Active CN101969721B (en) | 2010-09-16 | 2010-09-16 | Dual-wire data transmission method and device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101969721B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103714029B (en) * | 2013-05-07 | 2015-03-25 | 深圳市汇春科技有限公司 | Novel two-line synchronous communication protocol and application |
| FR3100349B1 (en) * | 2019-08-28 | 2022-07-08 | Stmicroelectronics Grand Ouest Sas | Communication on I2C bus |
| CN113473669B (en) * | 2020-03-30 | 2022-05-13 | 深圳市明微电子股份有限公司 | Double-line protocol read-write control chip, system and method |
| CN112802427B (en) * | 2021-04-14 | 2021-08-03 | 杭州视芯科技有限公司 | LED drive circuit, LED display system and display control method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2888788Y (en) * | 2005-12-28 | 2007-04-11 | 朱建钦 | A serial connected color controlling device for LED lamp |
| CN101175353A (en) * | 2007-10-23 | 2008-05-07 | 无锡市爱芯科微电子有限公司 | Integrated circuit for controlling and driving LED |
| CN201491318U (en) * | 2009-08-14 | 2010-05-26 | 深圳市彩拓科技开发有限公司 | Two-wire system LED drive circuit and LED drive system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7436217B2 (en) * | 2006-06-27 | 2008-10-14 | Allegro Microsystems, Inc. | Methods and apparatus for serially connected devices |
-
2010
- 2010-09-16 CN CN2010102869564A patent/CN101969721B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2888788Y (en) * | 2005-12-28 | 2007-04-11 | 朱建钦 | A serial connected color controlling device for LED lamp |
| CN101175353A (en) * | 2007-10-23 | 2008-05-07 | 无锡市爱芯科微电子有限公司 | Integrated circuit for controlling and driving LED |
| CN201491318U (en) * | 2009-08-14 | 2010-05-26 | 深圳市彩拓科技开发有限公司 | Two-wire system LED drive circuit and LED drive system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101969721A (en) | 2011-02-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101603648B (en) | Parallel type single-line addressing lighting device | |
| CN101969721B (en) | Dual-wire data transmission method and device thereof | |
| JP6883377B2 (en) | Display driver, display device and operation method of display driver | |
| KR101482234B1 (en) | Display device and clock embedding method | |
| CN103165083B (en) | Light emitting diode (LED) backlight drive circuit, liquid crystal display device and drive circuit | |
| CN102682701B (en) | A kind of LED display constant-current driving control system and output current control method thereof | |
| CN102800279A (en) | Display drive circuit and system thereof | |
| CN102006696B (en) | Light-emitting diode backlight drive circuit, method and constant current source thereof | |
| CN103000143B (en) | Full-color light-emitting diode (LED) array gray level adjustment method and circuit | |
| CN103839519A (en) | Display driving circuit and system with same | |
| CN102262851A (en) | Gate driver and display device having gate driver | |
| CN101916543B (en) | Data communication method of LED display system | |
| US10984202B2 (en) | Electronic label and method for driving the same | |
| CN102810301B (en) | The method of the reversal of liquid crystal display and control liquid crystal display pixel voltage | |
| CN104332135B (en) | A kind of display circuit in parallel and display device thereof | |
| CN101115334B (en) | PWM control signal generating method of series multi-pixel LED lamp | |
| CN101930349B (en) | Led scanning control chip | |
| CN105761682B (en) | Electronic device and backlight control method of display | |
| US20080122831A1 (en) | Timing controller and method of generating timing signals | |
| CN205069076U (en) | Multi -functional intelligent advertisement machine | |
| CN101964171B (en) | Data transmission method | |
| CN102622963B (en) | Simple and universal full-hardware control system of display screen | |
| CN202584691U (en) | LED constant-current drive chip | |
| US11397447B2 (en) | Electronic label and method for driving the same | |
| CN104050921A (en) | Display control and monitoring assembly and display system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |