CN2650228Y

CN2650228Y - Computer serial interface digital block display drive device

Info

Publication number: CN2650228Y
Application number: CN 200320105105
Authority: CN
Inventors: 崔建庄; 孙大鹏; 刘祝庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-10-31
Filing date: 2003-10-31
Publication date: 2004-10-20
Anticipated expiration: 2013-10-31

Abstract

The utility model relates to a data display device connected with a computer, which is mainly used for the computer data multi-directional display field of some service windows, and is characterized by a shell with a display, the shell has a signal input line, the connection relationship of main circuits in the shell is that: a signal output from a computer serial interface is connected with a level switching circuit, the level switching circuit is connected with a logic control circuit and a shift register, the logic control circuit is connected with a time sequence control circuit, the time sequence control circuit is connected with the shift register, the shift register is connected with the LED display. The time sequence control circuit is mainly formed by two time base circuits, which are connected through a NOT-gate circuit. The utility model provides a data display device connected with the computer, the purpose is solving the problems of some service windows such as unable to provide the multi-directional display of data, and inconvenience, etc.

Description

The digital piece display drive apparatus of computing machine serial line interface

One, technical field: the utility model relates to a kind of data presentation device that is connected with computing machine, is mainly used in the field of the multi-direction demonstration of computer data of some service windows.

Two, background technology: at present, be provided with the Mike of conversation mostly in a lot of service windows, the back documents against payment exchange information.But in some personnel crowded places, noisy especially place is difficult to not hear in a minute, and how much need be paid, and will inquire loudly sometimes.Computing machine in face of the attendant is to be used for convenient office equipment of oneself working, can not be under situation about can't talk clearly in a minute, often move over to see to the public, so can export from computer port, and the device that shows the amount of money towards the public is very important, but from present market, also there is not such device.

Three, summary of the invention:

1, goal of the invention: the utility model provides a kind of data presentation device that is connected with computing machine, and its purpose is to solve can not multi-direction video data at some service windows, the problem of bringing aspect such as a lot of inconveniences to exist to the public.

2, technical scheme:

The digital piece display drive apparatus of a kind of computing machine serial line interface, its signal input part is used to be connected the serial line interface place of computing machine, it is characterized in that: a casing that has display, on casing, have signal input line, main circuit annexation in casing is: be connected with a level shifting circuit from the signal of serial ports of computers output, level shifting circuit is connected with shift register with a logic control circuit, logic control circuit is connected with sequential control circuit, sequential control circuit is connected with shift register, and shift register is connected with light-emitting diode display.

Mainly form sequential control circuit, connect by an AND circuit between two time base circuits by two time base circuits.

3, advantage and effect: the utility model can solve the problem that exists aspects such as linking up difficulty to exist in some service trades well, especially when conversation Mike damages, more seem particularly necessary, the attendant operates microcomputer, and this device towards the public can show the amount of money intuitively.The function that the utility model uses device realization seldom to show, manufacturing cost is the cheapest, and stable performance, is difficult for breaking down.Intuitive display is carried out synchronously, comes into plain view, and can be widely used in charging windows such as hospital, traffic, bank, office.

Four, description of drawings: accompanying drawing 2 is the utility model contour structures synoptic diagram;

Accompanying drawing 1 is the utility model logic diagram;

Accompanying drawing 3 is the utility model oscillogram;

Accompanying drawing 4 is the utility model circuit connecting relation synoptic diagram.

Five, embodiment:

Shown in the accompanying drawing 1, the utility model is to be made of a device that is connected with the computing machine serial line interface, and it comprises phone chassis 1, the signal input line 3 that is connected with computing machine.Power supply can be provided by computing machine, also can adopt external power supply.Casing 1 is provided with display 2, is used for the video data amount of money.

Accompanying drawing 2 is a logic diagram of the present utility model, and arrow is represented the transmission direction of signal, and shown in figure, the utility model is more reasonable at least for realizing the used device of goal of the invention.

Accompanying drawing 3 is the utility model waveform signal counter-rotating synoptic diagram, and A represents that serial ports sends the FF waveform, B represents that serial ports sends the OO waveform, C represents that the anti-phase waveform of 556 (U2A) output terminal, D represent 556 (U2B) output terminal waveform among the figure; A is that start bit begins, b is that start bit finishes, c is 164 synchronizing signals among the figure, and d is that position of rest begins, e is that position of rest finishes.

In the accompanying drawing 4, the computing machine serial line interface is connected to 9 places in the utility model device by signal input line 3, through level shifting circuit 4, send into logic control circuit 5 and shift register 7 through processing signals, the signal output part of logic control circuit 5 is that sequential control circuit 6 connects, sequential control circuit 6 mainly is made up of a NE556 chip, touch for two of NE556 and be provided with not circuit 10 between the piece, the output terminal of sequential control circuit 6 is connected with shift register 7, shift register 7 is made up of a plurality of SN74164 chips, show the not amount of money of isotopic number, also can show that the different amount of money how much, establishes several SN74164 chips more according to actual needs.What be connected with shift register 7 signal output parts is light-emitting diode display 8.

The course of work of hardware components: when serial ports transmits a byte, at first send a start bit, this is a low level signal, utilize this signal triggering 556U2A trigger, the output terminal of 556U2A is through producing a low level after anti-phase, delay time is controlled at the width of 5 data bit, the reversed-phase output of 56U2A became high level when time-delay finished, utilize level rising edge from low to high as 164 synchronizing signal, the data that the input end of this moment 164 is received be exactly we want to transmit 0 or 1.556U2B is triggered behind the 556U2A trigger, its delay time is controlled in 10 data bit widths, the output of its output and serial ports is controlled the triggering of 556U2A by one with door together, and such purpose is when avoiding receiving data 0, and 556U2A is repeated to trigger.When 556U2B stopped, serial ports had begun to transmit position of rest, and this is the signal of a high level, spare bits after the position of rest also is the signal of high level, at this moment 556U2A can not produce trigger action, and up to the low level appearance of next start bit, 556U2A begins the next work period.Work schedule as shown in Figure 2.

Software section: use the method for a data bit of a byte representation, it is 8 bytes that a byte is torn open, represents position 1 with sexadecimal FF, represents 0 with 00, and example: certain digital type matrix sign indicating number is 10001110, data after splitting are exactly FF, and 00,00,00, FF, FF, FF, 00.Serial ports mode of operation quilt is set at 9600 baud rates, 1 start bit, 8 bit data, 2 position of rests.Like this, just, realized the data presentation of this display towards the public.

Claims

1, the digital piece display drive apparatus of a kind of computing machine serial line interface, its signal input part is used to be connected the serial line interface place of computing machine, it is characterized in that: a casing (1) that has display (2), on casing (1), have signal input line (3), main circuit annexation in casing (1) is: be connected with a level shifting circuit (4) from the signal of serial ports of computers output, level shifting circuit (4) is connected with shift register (7) with a logic control circuit (5), logic control circuit (5) is connected with sequential control circuit (6), sequential control circuit (6) is connected with shift register (7), and shift register (7) is connected with light-emitting diode display (8).

2, the digital piece display drive apparatus of a kind of computing machine serial line interface according to claim 1 is characterized in that: mainly form sequential control circuit (6) by two time base circuits, connect by a not circuit (10) between two time base circuits.