CN2723273Y

CN2723273Y - Remote control display screen for taxi

Info

Publication number: CN2723273Y
Application number: CN 200420032035
Authority: CN
Inventors: 鲍云奎
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-06-11
Filing date: 2004-06-11
Publication date: 2005-09-07
Anticipated expiration: 2014-06-11

Abstract

The utility model provides a remote control display screen for a taxi, characterized in that the remote control display screen comprises a 74HC95 serial input paralleling latch receiving the serial data controlling arrays of the single chip computers P1. 0, P1. 1, P1. 2 to proceed the scanning and a 74HC138 decoder receiving single chip computers P1. 3, P1. 4 to proceed the chip selection. The P1. 5, P1. 6, P1. 7 output 16 rows of signals through 3-8 decoding and control the 16 rows to scan through a transistor 1020 or PT127, the MAX232 stores the transmitting data to the EEROM6264 chip through the single chip computers, the RAM6246 randomly stores the data and does the displaying buffer, and a power supply adopts a 3A rectifying bridge and two diodes to reduce voltage, outputting 6V after being filtered to 7806 through high and low frequency. Due to adopting the light-focusing diode as a light source, the remote control display screen can save power of two third, the visual range of which exceeds the general filament lamp, and the remote control display screen can display the identification of the taxi company when the taxi runs, can be used as multiple flowing advertisements and also can send helping signals through pressing a remote controller when drivers are hijacked.

Description

Taxicar remote control read-out

Technical field

The utility model relates to the taxicar technical field of lamps, particularly a kind of taxicar remote control read-out.

Background technology

The structure of taxi dome lamp or taillight is to be provided with a filament lamp in lampshade at present, scribbles the sign of taxicar on the lampshade, and its shortcoming is the picture dullness, pattern-free changes, function singleness and consumption of current are big, particularly when taxicar is held as a hostage, can't send emergency or alerting signal.

Summary of the invention

The purpose of this utility model provides and a kind ofly can set in advance a plurality of pictures, and the taxicar remote control read-out that need adjust of root a tree name.

The utility model is to realize like this, it is characterized in that it has comprised reception micro controller system P1.0, P1.1, the parallel latch of 74HC95 serial input that P1.2 serial data control row scan, receive micro controller system P1.3, P1.4 carries out the 74HC138 decoder of sheet choosing, P1.5, P1.6, P1.7 is through 3---and 16 capable signals of 8 decoding outputs are controlled 16 line scannings through aerotron 1020 or PT127, MAX232 passes data with institute and stores the EEROM6264 chip through micro controller system, display buffer is done in the RAM6246 stochastic storing, the P0.0 of micro controller system---P0.7 does the least-significant byte A wire, do I/01---the data line of I/07 through the 74HC373 switching, P3.6, P3.7 makees the read-write line, P2.0---P2.4 makees high 5 bit address lines, P2.5, P2.6, P2.7 does sheet choosing and control line, P3.2, P3.3, P3.4, P3.5 does and drives the indicator lamp signal wire (SW), power supply adopts the serial type diode step-down of 3A rectifier bridge to 2, exports 6V to 7806 after low-and high-frequency filtering.

The utility model is owing to adopted the optically focused diode to do light source, therefore energy power saving 2/3rds, visual range surpasses common filament lamp, can demonstrate the sign of rent-a-car company when taxicar moves, also can make multiple mobile advertisement, can also when being held as a hostage, press remote controller and send an SOS.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described;

Fig. 1 is the circuit diagram of taxicar remote control read-out;

Fig. 2 is the circuit diagram of Fig. 1 sweep test.

The specific embodiment

Shown in Fig. 1-2, it comprises latch 74HC95 this taxicar remote control read-out, decoder 74HC138, aerotron Da-Dd, AT89S51, memory EEROM6264, random memory ram 6246, receive micro controller system P1.0 by 8-10 the parallel latch of 74HC95 serial input, P1.1, the P1.2 serial data, control 64-80 row scan, 2 74HC138 decoders, receive micro controller system P1.3, P1.4 carries out the sheet choosing, P1.5, P1.6, P1.7 controls 16 line scannings through 16 capable signals of 3-8 decoding output through aerotron 1020 or PT127, thereby show required figure or literal, lattice block adopts 8*8,5 super bright optically focused diodes, MAX232 passes data with institute and deposits the EEROM6264 chip through micro controller system, display buffer is done in the RAM6246 stochastic storing, the P0.0 of micro controller system---P0.7 does the least-significant byte A wire, do I/01---the data line of I/07 through the 74HC373 switching, P3.6, P3.7 makees the read-write line, P2.0---P2.4 makees high 5 bit address lines, P2.5, P2.6, P2.7 does sheet choosing and control line, P3.2, P3.3, P3.4, P3.5 does and drives the indicator lamp signal wire (SW), power supply adopts the serial type diode step-down of 3A rectifier bridge to 2, exports 6V to 7806 after low-and high-frequency filtering.

Claims

1, a kind of taxicar remote control read-out, it is characterized in that it has comprised reception micro controller system P1.0, P1.1, the parallel latch of 74HC95 serial input that P1.2 serial data control row scan, receive micro controller system P1.3, P1.4 carries out the 74HC138 decoder of sheet choosing, P1.5, P1.6, P1.7 is through 3---and 16 capable signals of 8 decoding outputs are controlled 16 line scannings through aerotron 1020 or PT127, MAX232 passes data with institute and stores the EEROM6264 chip through micro controller system, display buffer is done in the RAM6246 stochastic storing, the P0.0 of micro controller system---P0.7 does the least-significant byte A wire, do I/01---the data line of I/07 through the 74HC373 switching, P3.6, P3.7 makees the read-write line, P2.0---P2.4 makees high 5 bit address lines, P2.5, P2.6, P2.7 does sheet choosing and control line, P3.2, P3.3, P3.4, P3.5 does and drives the indicator lamp signal wire (SW), power supply adopts the serial type diode step-down of 3A rectifier bridge to 2, exports 6V to 7806 after low-and high-frequency filtering.