CN111261099A - Communication protocol of binary decoding line driving chip of LED display screen - Google Patents
Communication protocol of binary decoding line driving chip of LED display screen Download PDFInfo
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- CN111261099A CN111261099A CN202010244270.2A CN202010244270A CN111261099A CN 111261099 A CN111261099 A CN 111261099A CN 202010244270 A CN202010244270 A CN 202010244270A CN 111261099 A CN111261099 A CN 111261099A
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- control signal
- register
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
The invention discloses a communication protocol of a binary decoding line driving chip of an LED display screen, which comprises the following steps: sending a zero control signal, a first control signal and a second control signal to pins corresponding to the row driving chip for decoding 3-8 and then controlling the eight channels to be opened in sequence; a register is configured: configuring a zero control signal, a first control signal and a second control signal as specific values at the same time, waiting for the first time, and entering a register configuration mode; the zero control signal configures register data; the second control signal configures a register clock signal; the second control signal configures m virtual clock signals first and then configures n register clock signals, and the register clock signals correspond to the register data one by one to complete the configuration of the n-bit register. The communication protocol of the binary decoding line driving chip of the LED display screen can enable the line driving chip to configure the register, thereby flexibly controlling various functions of the chip and improving the display effect of the LED display screen in different applications.
Description
Technical Field
The invention relates to an LED display screen, in particular to a communication protocol of a binary decoding line driving chip of the LED display screen.
Background
The LED display screen is a flat panel display, consists of a plurality of LED module panels and is used for displaying various information such as characters, images, videos and the like. The method is widely applied to commercial media, cultural performance markets, stadiums, information dissemination, news distribution, security trading and the like, and can meet the requirements of different environments.
In the communication protocol of the LED display screen binary decoding line driving chip, the control signals a2, a1, a0 sent by the control board are only used for 3-8 decoding, as shown in fig. 1:
the row driving chip carries OUT 3-8 decoding on the received A2, A1 and A0 control signals to generate control signals C <7:0> and control the output OUT <7:0> of the power tube <7:0 >.
By using the protocol, the function of the line driving chip is single, and the display effect of the LED display screen can not be adjusted under different application environments.
Therefore, there is a need to solve the above technical problems.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a communication protocol of a binary decoding line driving chip of an LED display screen aiming at the defects in the prior art, and the line driving chip can be configured with a register by utilizing the communication protocol, so that various functions of the chip can be flexibly controlled, and the display effect of the LED display screen in different applications can be improved; and the communication protocol is applicable to both the common-sun display screen and the common-cathode display screen.
In order to solve the technical problem, the communication protocol of the binary decoding line driving chip of the LED display screen comprises the following steps:
sending a zero control signal, a first control signal and a second control signal to pins corresponding to the row driving chip for decoding 3-8 and then controlling the eight channels to be opened in sequence;
a register is configured:
configuring the zero control signal, the first control signal and the second control signal as specific values at the same time, waiting for the first time, and entering a register configuration mode;
the zero control signal configures register data;
the second control signal configures a register clock signal;
configuring a plurality of m virtual clock signals for the second control signal, and then configuring a plurality of n register clock signals for the second control signal, wherein the register clock signals correspond to the register data one to one, and the configuration of an n-bit register is completed;
and the row driving chip waits for the second time to perform normal row changing.
Further, the control signal No. zero, the control signal No. one, and the control signal No. two are cyclically transmitted in the order of 000 → 001 → 010 → 011 → 100 → 101 → 110 → 111 → 000.
Compared with the prior art, the invention has the following technical advantages:
1. the communication protocol of the invention can enable the line driving chip to configure the register, and flexibly control various functions of the line driving chip through the configuration register, thereby improving the display effect of the LED display screen in different applications;
2. the LED display screen is characterized in that the common cathode screen and the common anode screen are different in common level, the common anode means that the anodes of all the light-emitting diodes are connected together to form a common anode (COM), and the common cathode means that the cathodes of all the light-emitting diodes are connected together to form a common Cathode (COM); therefore, the communication protocol of the LED display screen serial decoding line driving chip is suitable for both the common-anode display screen and the common-cathode display screen.
Drawings
FIG. 1 is a timing diagram of the background art;
fig. 2 is a timing diagram of the present invention.
Detailed Description
The invention will be further described in detail with reference to examples of embodiments shown in the drawings to which, however, the invention is not restricted.
As shown in fig. 2, the communication protocol of the binary decoding line driving chip of the LED display screen according to the present invention includes the following steps:
sending a control signal a0 No. zero, a control signal a1 No. two and a2 No. two to corresponding pins of the row driver chip for decoding 3-8 and then controlling eight channels to be opened in sequence, and circularly scanning, for example, the control signal a0 No. one, the control signal a1 No. two and the control signal a2 are circularly sent in sequence 000 → 001 → 010 → 011 → 100 → 101 → 110 → 111 → 000;
a register is configured:
configuring a control signal zero A0, a control signal one A1 and a control signal two A2 to be specific values, such as 000, waiting for a first time Td, and entering a register configuration mode;
control signal number zero A0 configures register data REG [ n:1 ];
the second control signal A2 configures the register clock signal;
the second control signal A2 firstly configures a plurality of dummy clocks marked as m, and then configures a plurality of register clock signals marked as n, the register clock signals correspond to the register data REG [ n:1] one by one, and the configuration of the n-bit register is completed;
and the row driving chip waits for the second time Tend and carries out normal line feed.
When the invention is used specifically, the protocol can enable the binary decoding line driving chip of the LED display screen to configure the register, and the various functions of the line driving chip are flexibly controlled by the configuration register, thereby improving the display effect of the LED display screen in different applications; and the communication protocol is applicable to both the common-sun display screen and the common-cathode display screen.
In summary, the practical samples which have been prepared according to the present invention as described in the specification and shown in the drawings are tested for a long time, and from the results of the use test, it is needless to say that the expected purpose of the present invention can be achieved and the practical value is no longer questionable. The above-mentioned embodiments are only for convenience of illustration and not intended to limit the invention in any way, and those skilled in the art will be able to make equivalents of the features of the invention without departing from the technical scope of the invention.
Claims (2)
1. A communication protocol of a binary decoding line driving chip of an LED display screen is characterized by comprising the following steps:
sending a zero control signal, a first control signal and a second control signal to pins corresponding to the row driving chip for decoding 3-8 and then controlling the eight channels to be opened in sequence;
a register is configured:
configuring the zero control signal, the first control signal and the second control signal as specific values at the same time, waiting for the first time, and entering a register configuration mode;
the zero control signal configures register data;
the second control signal configures a register clock signal;
configuring a plurality of m virtual clock signals for the second control signal, and then configuring a plurality of n register clock signals for the second control signal, wherein the register clock signals correspond to the register data one to one, and the configuration of an n-bit register is completed;
and the row driving chip waits for the second time to perform normal row changing.
2. The communication protocol of the binary line driving chip for LED display screen according to claim 1, wherein the control signal zero, the control signal one and the control signal two are cyclically configured in the sequence 000 → 001 → 010 → 011 → 100 → 101 → 110 → 111 → 000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010244270.2A CN111261099A (en) | 2020-03-31 | 2020-03-31 | Communication protocol of binary decoding line driving chip of LED display screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010244270.2A CN111261099A (en) | 2020-03-31 | 2020-03-31 | Communication protocol of binary decoding line driving chip of LED display screen |
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| CN111261099A true CN111261099A (en) | 2020-06-09 |
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| CN202010244270.2A Pending CN111261099A (en) | 2020-03-31 | 2020-03-31 | Communication protocol of binary decoding line driving chip of LED display screen |
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Citations (8)
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| US20060227094A1 (en) * | 2005-04-11 | 2006-10-12 | Lg.Philips Lcd Co., Ltd. | Gate driver for a display device and method of driving the same |
| CN202189535U (en) * | 2011-06-10 | 2012-04-11 | 深圳市明微电子股份有限公司 | Display and control circuit and display and control device with signal monitoring function |
| KR101138626B1 (en) * | 2004-11-22 | 2012-05-17 | 파나소닉 액정 디스플레이 주식회사 | Image display apparatus and drive circuit thereof |
| CN104252841A (en) * | 2014-09-15 | 2014-12-31 | 西安诺瓦电子科技有限公司 | LED (Light Emitting Diode) display control method and card and LED display screen system |
| CN104778921A (en) * | 2015-04-24 | 2015-07-15 | 广东威创视讯科技股份有限公司 | LED display screen decoding row selection circuit and LED display screen control system |
| CN106652888A (en) * | 2016-11-28 | 2017-05-10 | 深圳市富满电子集团股份有限公司 | LED display screen and scanning control circuit thereof |
| CN207352942U (en) * | 2017-10-30 | 2018-05-11 | 合肥集创微电子科技有限公司 | Drive circuit for LED display |
| CN109887463A (en) * | 2019-04-18 | 2019-06-14 | 深圳市德普微电子有限公司 | A kind of LED display line driving chip |
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2020
- 2020-03-31 CN CN202010244270.2A patent/CN111261099A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101138626B1 (en) * | 2004-11-22 | 2012-05-17 | 파나소닉 액정 디스플레이 주식회사 | Image display apparatus and drive circuit thereof |
| US20060227094A1 (en) * | 2005-04-11 | 2006-10-12 | Lg.Philips Lcd Co., Ltd. | Gate driver for a display device and method of driving the same |
| CN202189535U (en) * | 2011-06-10 | 2012-04-11 | 深圳市明微电子股份有限公司 | Display and control circuit and display and control device with signal monitoring function |
| CN104252841A (en) * | 2014-09-15 | 2014-12-31 | 西安诺瓦电子科技有限公司 | LED (Light Emitting Diode) display control method and card and LED display screen system |
| CN104778921A (en) * | 2015-04-24 | 2015-07-15 | 广东威创视讯科技股份有限公司 | LED display screen decoding row selection circuit and LED display screen control system |
| CN106652888A (en) * | 2016-11-28 | 2017-05-10 | 深圳市富满电子集团股份有限公司 | LED display screen and scanning control circuit thereof |
| CN207352942U (en) * | 2017-10-30 | 2018-05-11 | 合肥集创微电子科技有限公司 | Drive circuit for LED display |
| CN109887463A (en) * | 2019-04-18 | 2019-06-14 | 深圳市德普微电子有限公司 | A kind of LED display line driving chip |
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Application publication date: 20200609 |