CN202976028U - Touch screen input light emitting diode (LED) Chinese character display system - Google Patents
Touch screen input light emitting diode (LED) Chinese character display system Download PDFInfo
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- CN202976028U CN202976028U CN 201220709413 CN201220709413U CN202976028U CN 202976028 U CN202976028 U CN 202976028U CN 201220709413 CN201220709413 CN 201220709413 CN 201220709413 U CN201220709413 U CN 201220709413U CN 202976028 U CN202976028 U CN 202976028U
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Abstract
The utility model relates to a touch screen input light emitting diode (LED) Chinese character display system which is based on AT89S52 single chip microcomputer control of the Atmel company. The touch screen input LED Chinese character display system mainly comprises a touch screen input circuit, a touch screen control circuit, a Chinese character display control circuit, a driving circuit and a 16*16 LED display screen. Simultaneously, peripheral circuits, namely a time clock circuit and a reset circuit, are arranged to lead a single chip microcomputer to work normally. An operator can input Chinese characters needed to be displayed into a touch screen controller through a touch screen, the touch screen control circuit and the Chinese character display control circuit process the input information and calculate font codes of the Chinese characters needed to be displayed so as to output the Chinese characters needed to be displayed into the 16*16 LED display screen, and the 16*16 LED display screen displays corresponding Chinese characters under supporting of the driving circuit. The touch screen input LED Chinese character display system can change contents of the displayed Chinese characters at any time, prevents the staff from entering a dangerous operation environment, and guarantees safety of the operators.
Description
Technical field
The utility model is based on the monolithic processor controlled touch-screen input of the AT89S52 LED Chinese-character display system of atmel corp, belongs to the industrial automation product.
Background technology
Present most of LED Chinese-character display system is the Chinese character real-time input systems that needs can not be shown, mainly the Hanzi font code is programmed in program, by data line, program is downloaded in control chip, this mode time and effort consuming, not only need the download equipment of specialty, and require the user to have higher computer program to write ability.And, make the Hanzi font that shows in this way too dull, can't demonstrate hand-written effect.Simultaneously, some LED display is placed on higher or comparatively remote place, position, and the programming personnel need to bear larger life danger when operating.
Summary of the invention
Goal of the invention:
The purpose of this utility model mainly contains two.One, make the LED Chinese-character display system can realize input information freely, substitute out-of-date manually-operated with advanced technology, not only greatly save the work resource, and allowed more user Display of Chinese characters on LED display as required; Two, avoid operating personnel to arrive the situation of danger position execute-in-place, protection personnel's life security; Three, can make LED demonstrate the Chinese character of similar clerical type rather than the Chinese character of block letter.
The technical solution of the utility model is achieved in that
Whole system comprises that touch-screen input circuit, touch screen control circuit, Chinese character display control circuit, 16 * 16LED dot matrix display circuit, driving circuit and related software form.The touch-screen input circuit is made of 4 wire resistive touch screens and is connected with touch screen control circuit by wire, the position shake-up signal that acts on touch-screen can be converted to corresponding analog voltage signal and outputs on touch screen control circuit.Touch screen control circuit is based on that the ADS7843 chip consists of and is connected with the Chinese character display control circuit by wire, the analog voltage signal of touch-screen output can be converted to the digital quantity of corresponding X, Y coordinate and outputs in the Chinese character display control circuit.In order reducing the taking of single-chip microcomputer IO interface in the Chinese character display control circuit, to take to realize by software programming the mode simulative serial port communication of serial communication protocol in use, to realize the transmission of information.The peripheral circuits such as the Chinese character display control circuit is mainly by AT89S52 single-chip microcomputer and clock, reset, power supply consist of, it is the core of system, can go out the font code of required Display of Chinese characters and corresponding data are outputed in driving circuit by serial port according to the position coordinates calculated signals of touch screen control circuit input, the operation of whole system is controlled.Adopt the mode of dynamic scan when showing, by timer, sweep frequency is set in 25Hz.Driving circuit can convert the serial font coded signal of single-chip microcomputer output to can light 16 * 16LED dot matrix parallel signal, and is that the normal operation of 16 * 16LED dot matrix provides electric energy, is the important guarantee of realizing system works.16 * 16LED dot matrix display circuit can demonstrate corresponding Chinese character according to the font code of single-chip microcomputer output.Native system is writing of the relative program completed under the Keil C51 programmed environment of Keil Software software company exploitation, makes system have the ability that according to touch-screen input demonstrates corresponding Chinese character.
Owing to taking technique scheme, make the utility model replace to change by software programming the mode of the shown Chinese character of LED display fully in the past, not only greatly reduce workman's labour intensity, also reduced the injury that the operator may be subject to when the programming that the LED that is positioned over hazardous environment is shielded.Simultaneously, greatly expanded the writing style that can be presented at the Chinese character on LED.
Description of drawings
Fig. 1 is the utility model system architecture schematic diagram
Fig. 2 is LED dot matrix circuit diagram of the present utility model
Fig. 3 is controller crystal oscillating circuit figure of the present utility model
Fig. 4 is controller reset circuit figure of the present utility model
Mark: 1, touch-screen input circuit; 2, based on the touch screen control circuit of ADS7834; 3, based on the Chinese character display control circuit of AT89S52 single-chip microcomputer; 4, driving circuit; 5,16 * 16LED display circuit; 3-1,10MHz crystal oscillator.
Embodiment
The utility model comprises touch-screen input circuit (1), touch screen control circuit (2), Chinese character display control circuit (3), driving circuit (4) and 16 * 16LED display circuit (5) five parts.Chinese character display control circuit (3) also need to be correlated with peripheral circuit---clock input circuit and reset circuit guarantee its normal operation.When touching touch-screen, touch-screen according to can be with the transverse and longitudinal coordinate that touches the position with the formal output of voltage to touch screen control circuit.Touch screen control circuit consists of based on the ADS7843 chip, after position shake-up information having been detected, it is eliminated dithering process to reduce maloperation, and the position that will meet standard touches the corresponding binary digit amount that converts to of information, simultaneously these digital quantities exported to the Chinese character display control circuit according to serial communication protocol.The Chinese character display control circuit calculates the font code of the Chinese character of required demonstration according to the shake-up position coordinates of touch screen control circuit output, and these data are exported to driving circuit by the serial line interface of single-chip microcomputer.Driving circuit is based on the 74HC595 chip, and the serial font code information with single-chip microcomputer output converts the parallel signal that can control the LED demonstration on the one hand, offers on the one hand in addition the required electric energy of LED display normal operation.Each output pin of 74HC595 chip is connecting row or delegation's light emitting diode of 16 * 16LED display screen, is controlling the opening and turn-offing of light emitting diode of corresponding row or column.In order to take less chip pin as far as possible, adopt the mode of dynamic scan when showing, only control opening and turn-offing of a row light emitting diode at every turn, the output pin of the 74HC595 of respective column is high level at this moment, be connected to the font code of this column information of 74HC595 chip pin output display of every delegation light emitting diode, show after time-delay a period of time and scan by column like this Display of Chinese characters by next column.16 * 16LED display circuit is lighted the light emitting diode of relevant position after the parallel control information that receives driving circuit.Exist of short duration vision to stop according to human eye, the interruption that the timer by AT89S52 single-chip microcomputer inside when showing produces is controlled at 25Hz with sweep frequency.
Beneficial effect:
The utility model can be placed on the exposed to contact place of operator with touch-screen importation (1) when practical application, can make operating personnel show as required required Chinese character at any time and not need to revise program in single-chip microcomputer, greatly having simplified operating process and labour intensity.In the situation that LED board need to be placed on higher or comparatively dangerous place, position, this operator scheme can avoid making operating personnel to enter dangerous operating environment, the probability that the minimizing personnel come to harm.
Claims (5)
1. touch-screen is inputted the LED Chinese-character display system, comprise touch-screen input circuit, touch screen control circuit, Chinese character display control circuit, driving circuit, five parts of LED display circuit, it is characterized in that: described touch-screen input circuit is formed and is connected with touch screen control circuit by wire by a four-wire resistance type touch screen, the shake-up position signalling on touch-screen can be converted to corresponding voltage signal and output in touch screen control circuit; Touch screen control circuit consists of based on the ADS7843 chip, the voltage signal of touch screen circuitry input can be converted to digital signal and transfer data in the Chinese character display control circuit by wire; The Chinese character display control circuit consists of based on the AT89S52 single-chip microcomputer, can process the input position coordinate signal, and the data that obtain are exported by serial ports; Driving circuit consists of based on the 74HC595 chip, is connected with single-chip microcomputer by wire, can convert the serial data that single-chip microcomputer is exported to parallel data, and the luminous electric energy that provides of LED is provided; The LED display circuit is connected with driving circuit by wire, can light the light emitting diode of relevant position according to the parallel data that driving circuit receives.
2. touch-screen according to claim 1 is inputted the LED Chinese-character display system, it is characterized in that: the anode of every delegation light emitting diode of LED display circuit is connected by wire with the output pin of the 74HC595 chip of driving circuit respectively, and 16 row need two 74HC595 chips altogether; The negative electrode of each row light emitting diode is connected by wire with the output pin of the 74HC595 chip of driving circuit respectively, and 16 row need two 74HC595 chips altogether.
3. touch-screen according to claim 1 is inputted the LED Chinese-character display system, and it is characterized in that: the Chinese character display control circuit is based on the digital processing system of AT89S52 single-chip microcomputer, needs external clock input circuit and reset circuit when work.
4. touch-screen according to claim 1 is inputted the LED Chinese-character display system, it is characterized in that: the Chinese character display control circuit by TX pin serial output data, is exported the synchronous clock signal of exporting by the RX pin when output.
5. touch-screen according to claim 1 is inputted the LED Chinese-character display system, it is characterized in that: touch screen control circuit is connected by the IO interface of wire with the Chinese character display control circuit, realizes that by software programming serial communication protocol comes the transmission of data in use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220709413 CN202976028U (en) | 2012-12-20 | 2012-12-20 | Touch screen input light emitting diode (LED) Chinese character display system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220709413 CN202976028U (en) | 2012-12-20 | 2012-12-20 | Touch screen input light emitting diode (LED) Chinese character display system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202976028U true CN202976028U (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220709413 Expired - Fee Related CN202976028U (en) | 2012-12-20 | 2012-12-20 | Touch screen input light emitting diode (LED) Chinese character display system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107784984A (en) * | 2016-08-30 | 2018-03-09 | 胡敏 | A kind of design of liquid crystal display |
| CN109754720A (en) * | 2019-03-21 | 2019-05-14 | 宁夏农林科学院农业经济与信息技术研究所（宁夏农业科技图书馆） | A kind of agricultural and forest science information Broadcast Control interaction platform and information Broadcast Control interaction systems |
-
2012
- 2012-12-20 CN CN 201220709413 patent/CN202976028U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107784984A (en) * | 2016-08-30 | 2018-03-09 | 胡敏 | A kind of design of liquid crystal display |
| CN109754720A (en) * | 2019-03-21 | 2019-05-14 | 宁夏农林科学院农业经济与信息技术研究所（宁夏农业科技图书馆） | A kind of agricultural and forest science information Broadcast Control interaction platform and information Broadcast Control interaction systems |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20131220 |