CN2519358Y

CN2519358Y - Hand held manual character display device

Info

Publication number: CN2519358Y
Application number: CN01252617U
Authority: CN
Inventors: 魏建华; 潘传芳; 艾志伟
Original assignee: Wuhan University WHU
Current assignee: Wuhan University WHU
Priority date: 2001-11-28
Filing date: 2001-11-28
Publication date: 2002-10-30
Anticipated expiration: 2011-11-28

Abstract

The utility model relates to a hand-held manual character display comprising a light-emitting diode LED and a controlling circuit, a plurality of diodes form a single-row diode which are controlled by a single chip microcomputer, the negative electrodes of diodes are separately connected with the LED driving port of the single chip microcomputer, while the positive electrodes are separately connected with the positive electrode of a power supply, the display is provided with a mercury switch which can sense the movement of the display, one pin of the mercury switch is connected the negative electrode of the power supply, while the other pin is connected with the external interrupt input of the single chip microcomputer, the utility model adopts the single chip microcomputer to control the single-row diode to show characters, the mercury switch can be turned on or off according to the left or right movement of hands, after the turning on or off signals being sent to the single chip microcomputer, the single chip computer can calculate the once-left-to-right time based on the turning on or off signals so as to control the one-character displaying time of the single-row LED in the next left-to-right process, the right scanning can do the scan display in character lattice order, the left scanning can do the scan display in character lattice reverse order, the mould of characters and pictures can be input through a press button switch, which will not be lost even when electricity is cut off, and because of the simple controlling circuit of the utility model, less LED are used and the size of the utility model can be smaller.

Description

The handheld manual alphanumeric display

Technical field

The utility model relates to a kind of handheld manual alphanumeric display.

Background technology

Generally adopt the method that is covered with led array on flat board with LED (light emitting diode) character display and image, the LED of use is many, the control circuit complexity, and volume is bigger, thereby is difficult to use on handheld instrument.

Summary of the invention

Problem to be solved in the utility model provides the handheld manual alphanumeric display that simpler, the used LED of a kind of control circuit is less, volume is less.

The technical solution of the utility model is: a kind of handheld manual alphanumeric display, comprise LED and control circuit thereof, it is characterized in that: constitute single diode by several diodes, light emitting diode is by Single-chip Controlling, the negative pole of light emitting diode drives mouth with the LED of single-chip microcomputer respectively and links to each other, positive pole connects the positive pole of power supply, display interior is provided with the mercury cut-off of a perception display motion, a pin of mercury cut-off connects the negative pole of power supply, and another pin connects the external interrupt input of single-chip microcomputer.

Above-mentioned single-chip microcomputer can adopt AT90S4414, external 16 LED 1～LED16, the negative pole of light emitting diode links to each other with two 8 I/O mouth PA0～PA7, the PC0～PC7 of AT90S4414 respectively by current-limiting resistance, the positive pole of light emitting diode connects the positive pole of power supply, a pin of mercury cut-off connects the negative pole of power supply, another pin meets the external interrupt input PD2 of single-chip microcomputer, and 5 button switch K 1～K5 are connected on the PB0～PB4 pin of single-chip microcomputer.

Single-chip microcomputer of the present utility model can be with LED driving force I/O mouth being arranged and the single-chip microcomputer of eeprom memory being arranged, as single-chip microcomputers such as AT90S4414, AT90S8515, also can be with the single-chip microcomputer that does not have LED driving force and eeprom memory, as single-chip microcomputers such as AT89LV51, PCI16C62, PCI16C63, PCI16C64.The single-chip microcomputer that does not have direct driving LED ability increases the current drives triode at the I/O mouth; The single-chip microcomputer that does not have eeprom memory is with the external Serial E EPPROM storer of I/O mouth line.

The utility model adopts the single diode displaying character of Single-chip Controlling, mercury cut-off opens or closes according to the move left and right of staff, this switching signal sends single-chip microcomputer to, single-chip microcomputer calculates the time that shows about it back and forth once according to switching signal, single LED comes flyback retrace to show the time of a character when going to control about the next one back and forth, right scanning is to show by the character pattern sequential scanning, and left side scanning is to show by the scanning of character pattern opposite sequence.With the pushbutton switch type matrix of input character and figure voluntarily, and power down is not lost.Thereby simple, the used LED of control circuit of the present utility model is less thereby volume is little.

Description of drawings

Fig. 1 is an electrical block diagram of the present utility model;

Fig. 2 arranges and corresponding labeled graph for LED;

Fig. 3 is 16 * 16 check board planimetric map;

The heart type lattice mode figure of Fig. 4 on check board, designing.

Embodiment

Referring to Fig. 1, the utility model comprises LED and control circuit thereof, and with the single diode (LED) 1～LED16 of Single-chip Controlling character display, LED is vertical array (as shown in Figure 2), the light-emitting area of LED is a rectangle, also can use circular or foursquare LED.Single-chip microcomputer adopts AT90S4414, mainly contains 4KFLASH in it, 256 byte SRAM, 256 byte EEPROM, two timers, two external interrupt.FLASH is used to deposit program and character repertoire, EEPROM is used to deposit the character of user's input, one in two timers as regularly showing, another writes down handheld manual alphanumeric display time back and forth of side-to-side movement, only judges the movement position of display with an external interrupt.The negative pole of LED 1～LED16 links to each other with two 8 I/O mouth PR0～PA7, PC0～PC7 of single-chip microcomputer respectively by current-limiting resistance R1～R16, the positive pole of LED1～LED16 connects the positive pole of power supply, display interior is provided with the mercury cut-off KHg of a perception display motion, is used for perception display motion direction; A pin of mercury cut-off connects the negative pole (ground wire) of power supply, and another pin meets the external interrupt input PD2 of single-chip microcomputer.5 button switch K 1～K5 are connected on the PB0～PB4 pin of single-chip microcomputer, and R21～R25 is a pull-up resistor.

KHg is a mercury cut-off, and its shell is a glass capsulation, and mercury (Hg) can move within it.KHg is when display is mobile from left to right, mercury is shifted to the left side connects two wires, the current potential of PD2 is by high step-down, single-chip microcomputer picks up counting, when the display move left and right once, single-chip microcomputer is write down the required time, and calculates the time that shows type matrix one vertical setting of types once shows type matrix one vertical setting of types as next move left and right time.The speed of display move left and right is fast more, shows that the time of type matrix one vertical setting of types is short more.For the complete demonstration that guarantees character and demonstration evenly, according to staff move left and right rule, during software design the staff move left and right time once is divided into quarter; The right and left respectively accounts for equal portions, and LED does not show.The centre is two equal portions, and portion is the time of moving from left to right, type matrix to read order be forward, another part is the time of moving from right to left, type matrix to read order be reverse.This just guarantee the complete demonstration of character and demonstration evenly.Type matrix demonstration twice back and forth of display move left and right has increased the character display frequency.

Button switch K 5 is used to select working method.LED1 is bright during start, and the working method of display is 1, clicks K5, LED1, LED2 are bright, the rest may be inferred, and the bright number of LED1～LED6 is represented working method, is followed successively by to show EEPROM character repertoire, figure, part Chinese character, English alphabet, import type matrix, single LED pattern repeat voluntarily.

Showing under the character library mode that K1, K2 are respectively applied for and select a lower and upper character.K4 is used for select showing several characters, as selecting 3 characters, and two characters that comprise selected character and back thereof demonstration that circulated in 1 second of being separated by.

Single LED pattern repeat is that single led section shows, moves at regular intervals to move a step, and has stored many circulation styles in the single-chip microcomputer, selects with K1, K2, and the circulation translational speed is adjusted with K3.

The utility model can be imported type matrix voluntarily.The position corresponding with LED1～LED16 indicates 16 numerals 0～15 (as shown in Figure 2) on the shell of display.The user can design the dot matrix of character or figure on 16 * 16 check board (as shown in Figure 3).Choose which vertical setting of types input dot matrix with the K1 key, corresponding several LED are luminous.The K2 key is selected which point of this vertical setting of types, and corresponding which LED is glittering, represents that promptly this point shows, can close this point by K3 and show, shows again by K3 again.By character that designs or graphic dot matrix input, press K4 at last and confirm so successively, type matrix just is kept among the interior EEPROM of single-chip microcomputer, and with hand double swerve display, the character of input can show.Can preserve 8 character or the figures of input voluntarily in the single-chip microcomputer, power down is not lost.

Above-mentioned single-chip microcomputer can be with LED driving force I/O mouth being arranged and the single-chip microcomputer of eeprom memory being arranged, as single-chip microcomputers such as AT90S4414, AT90S8515, also can be with the single-chip microcomputer that does not have LED driving force and eeprom memory, as single-chip microcomputers such as AT89LV51, PCI16C62, PCI16C63, PCI16C64.The single-chip microcomputer that does not have direct driving LED ability increases the current drives triode at the I/O mouth; The single-chip microcomputer that does not have eeprom memory is with the external Serial E EPPROM storer of I/O mouth line.

Claims

1. handheld manual alphanumeric display, comprise LED and control circuit thereof, it is characterized in that: constitute single diode by several diodes, light emitting diode is by Single-chip Controlling, the negative pole of light emitting diode drives mouth with the LED of single-chip microcomputer respectively and links to each other, and positive pole connects the positive pole of power supply, and display interior is provided with the mercury cut-off of a perception display motion, a pin of mercury cut-off connects the negative pole of power supply, and another pin connects the external interrupt input of single-chip microcomputer.

2. display according to claim 1 is characterized in that: the single-chip microcomputer single-chip microcomputer that LED driving force I/O mouth is arranged and eeprom memory is arranged, and the negative pole of light emitting diode links to each other with the I/O mouth, and the positive pole of light emitting diode connects the positive pole of power supply.

3. display according to claim 2, it is characterized in that: single-chip microcomputer adopts AT90S4414, external 16 LED 1～LED16, the negative pole of light emitting diode links to each other with two 8 I/O mouth PA0～PA7, the PC0～PC7 of AT90S4414 respectively by current-limiting resistance, the positive pole of light emitting diode connects the positive pole of power supply, a pin of mercury cut-off connects the negative pole of power supply, another pin meets the external interrupt input PD2 of single-chip microcomputer, and 5 button switch K 1～K5 are connected on the PB0～PB4 pin of single-chip microcomputer.