CN2312509Y

CN2312509Y - Intelligent type multi-function liquid crystal instrument for motor vehicle

Info

Publication number: CN2312509Y
Application number: CN 98200585
Authority: CN
Inventors: 胡金玉; 胡瑞兰
Original assignee: Dingjiawei Science & Trade Group Corp
Current assignee: Dingjiawei Science & Trade Group Corp
Priority date: 1998-01-21
Filing date: 1998-01-21
Publication date: 1999-03-31
Anticipated expiration: 2008-01-21

Abstract

The utility model relates to an intelligent multifunctional liquid crystal instrument for a motor vehicle, having strong sunshine resistance, wide viewing angles, high contrast, low temperature resistance and use at night, and relating to the field of the vehicular computer of the motor vehicle, signals, monitoring, display and detecting instruments. The integrative structure of the utility model is composed of two PCB electronic circuit boards, three vehicular liquid crystal display screens with strong sunlight resistance, wide viewing angles, high contrast and low temperature resistance, three colorful light emitting diode box having long service life, strong sunlight resistance and high brightness used as a background light source with adjustable brightness and arranged in an instrument case after a pressed frame support is connected with a flat cable through zebra strips, and a set of operating and touch keyboards connected by the flat cable and fixed to the surface of the instrument case.

Description

Motor vehicle intelligent multifunction liquid crystal instrument

The utility model is a kind of anti-strong sunlight, wide visual angle, high-contrast, low temperature resistant and night spendable motor vehicle intelligent multifunction liquid crystal instrument.The truck-mounted computer that relates to motor vehicle, signal, monitoring, demonstration and measuring instrument field.

It is the instrument of electronics that various data during the current mobility car travels, information adopt each class mechanical type instrument or part mostly, is used for respectively writing down and showing.Before present patent application, once a kind of motor vehicle intelligence liquid crystal instrument and patent applied for had been invented by the inventor, patent No. ZL95212926.4, it provides a kind of intelligent comprehensive liquid crystal display instrument for motor vehicles, can be directly perceived, composite sound, light shows and various information is provided, black box function, and applicable motor vehicle uses when low temperature and night running, but its weak point is under the strong sunlight irradiation, clear inadequately, also do not have simultaneously the vehicle computing machine multifunctional to show and function such as real-time vehicle-mounted clock, thereby its practicality is subjected to certain restriction, the purpose of this utility model is to provide a kind of under strong sunlight for motor vehicles, also can be clear, demonstrate the information of whole needs lucid and livelyly, provide a kind of anti-strong sunlight, wide visual angle, high-contrast, low temperature resistant and night spendable motor vehicle intelligent multifunction liquid crystal instrument.

The utility model is realized by following technical scheme: this instrument is by two PCB electronic circuit boards 2, three anti-strong sunlights, wide visual angle, high-contrast, low temperature resistant vehicle-mounted liquid crystal LCD display 3, three anti-strong sunlights, high brightness, the LED type background light source 5 that long-life is coloured, operate membrane keyboard plate 4 and instrument case 1 for one group, they are through zebra bar (being conductive rubber) 6, and press box support 7 and flat cable are installed in the instrument case after connecting, be combined into the one-piece construction of instrument, operation keyboard is fastened on the watchcase surface with flat cable.IC circuit and electronic devices and components on two PCB electronic circuit boards 2 at the back side of display screen comprise: single-chip microcomputer primary processor U5 MC68HC711E9 and peripheral circuit thereof; System expands standby least-significant byte address latch U4 74HC373; And the U3GAL16V8 of address decoding and control; The input of Boolean value output sensor, earlier through optocoupler U17--U21 TLP521--4 to driver U13, U1474HC244; Rotating speed, the input U22 LM139 of vehicle speed pulse formula sensor; The special-purpose driving circuit U11MC145003 of the liquid crystal of simplifying; Reset circuit U1 MAX6314; The sound circuit of simplifying is by U8, U9 IS22C010, U1574HC374, and U16 LM386 SP1 forms; " line or " circuit U 6 74HC07 of operation touch keyboard; Independently, the real-time vehicle-mounted clock circuit U10 PCF117IC that does not need external LCD drive: the feed circuit U12MC34063 of system, R16, HP011, C11, R14 etc.; Instrument background light source power supply and light adjusting circuit VTL LM338 and U7 TPIC6B273; Cooling-water temperature transmitter input circuit R19, RT1, Z2; The outer temperature temperature sensor input circuit of car, R20, RT2, Z3; Fuel-quantity transducer input circuit R21, RT3, Z4; The speed of a motor vehicle, the sensor input circuit U22 LM139 of rotational speed pulse signal formula.

Now the each several part that the utility model is formed is analyzed as follows:

(1) various sensors

The utility model has adopted various types of sensors, comprises the sensor of the pulse signal formula that the speed of a motor vehicle and rotating speed are used, and the pulse signal that collects is from it sent into the input end IC1 of single-chip microcomputer U5 MC68HC711E9, IC2 through U22 LM139; Oil mass, the liquid that the outer temperature of coolant temperature and car the is adopted temperature sensor NTC of the temperature-sensitive electricity formula of temperature, the simulating signal of gathering on RT1, RT2, RT3 is transferred into the A/D input AN0--AN3 that magnitude of voltage send U5 respectively; Boolean value output sensor is delivered on the data line of U5 through optocoupler U17--U21 TLP521--4 and driver U13, U14 74HC244 again, gathers for U5, handles and send demonstration.

(2) single-chip microcomputer primary processor U5 MC68HC711E9 and peripheral circuit.

Single-chip microcomputer main processor system of the present utility model is the core of instrument and truck-mounted computer, selected the series of U5MC68HC711E9 for use, this single-chip microcomputer, aboundresources, function is complete, contain: slice internal memory EEPROM, EPROM, OTPROM, RAM, high-performance 16 bit timings/timer, house dog, 4 output of 5 input capture functions of 4 grades of program-controlled frequency dividers comparing function, parallel I/O mouth is 34/38, SCI full duplex serial communication port, the outer perisotomice of SPI serial, 8 tunnel 8 A/D passages comprise sample circuit, LCD drives function, resource and functions such as real-time interrupt.Peripheral circuit comprises: the crystal oscillating circuit Q1 of system, least-significant byte address latch (standby) U4 74HC373, address decoding and control U3 GAL16V8, Boolean value output sensor input U17--U21 TLP521--4, U13, U14,74HC244, pulsed quantity sensor input U22 LM139, simulation volume sensor input RT1--RT3 circuit, the special-purpose driving circuit U11 of liquid crystal MC145003, reset circuit U1 MAX6314, sound circuit is by U1574HC374, U8, U9 IS22C010, U16 LM386, SP1 forms, the feed circuit U12MC34063 of system, instrument background light source and light adjusting circuit VT LM338, U7 TPIC6B273, independently real-time vehicle-mounted clock circuit U10 PCF117IC etc.

(3) vehicle-mounted LCDs of anti-strong sunlight and driving circuit thereof, the utility model has adopted anti-strong sunlight, wide visual angle, high-contrast, low temperature resistant vehicle-mounted liquid crystal, adopted the driving circuit U11 MC145003 of the liquid crystal special use of simplifying, be applicable to single-chip microcomputer SPI serial peripheral interface, it can drive 128 display segments or dot matrix, according to the different user requirement, can increase chip, realize that the cascade type of drive is also optional.

(4) anti-strong sunlight, high brightness, long-life, coloured LED background light source.

Background light source of the present utility model, they are in backlight such as EL, CCFL, incandescent lamp etc., and the LED life-span is long, and is the most reliable, and cost is minimum, and LED injects by the semiconductor PN ion and luminous, can show red, green, orange, blue look, also can carry out photochromic conversion.

(5) reduction language prompting caution system

The utility model adopts U15 74HC374, U8, U9, IC22C010, U16 LM386 and SP1 circuit, U8, U9 are the high performance programmable speech chips that adopts CMOS, it is made up of one time programming ROM and noise reduction logical circuit etc., it can be respectively under 8KHZ, 6KHZ and 5KHZ sampling frequency, adopts the distinctive dynamic overpressure technology that contracts, respectively the language of synthetic 8 seconds, 10.5 seconds and 12.8 seconds, and directly edit input at the scene.Language length is divided 16 sections, and trigger end S1--S4 reads certain section language content by U5 control separately through U15, and output send loudhailer SP1 to realize through note amplifier U16.This circuit system is simplified, and can use according to customer requirements cascade or monolithic flexibly, and volume is little, is beneficial to miniaturization, the utility model following prompting of having programmed, and the caution content:

Temperature aspect: " water temperature is too high, please notes "

Oil mass aspect: " low on fuel please refuel "

Oil pressure aspect: " the oil pressure deficiency please notes "

Level aspect: " level is too high, please notes "

Engine speed aspect: " engine is overrun, and please take measures "

Secure context: " Buckle Up, and Buckle Up "

Car door aspect: " please shut car door, please shut car door "

(6) operation touch keyboard system

The utility model has adopted the desirable thin film switch panel of high-tech, and as the operation touch keyboard system of this instrument, it is as the means of information and people's dialogue, and both convenient, reliable, attractive in appearance novelty is collection function button, indicator elment, and instrument face plate is an one.For button is responded fast, save time simultaneously, improve system benefit, keyboard has been taked interrupt mode, and " line or " circuit U 6 74HC07 also can remove U6, be used for the not tight system of time requirement, the key function of keyboard is to realize with coded system, and K0 switches, K1 has the records of distance by the log and resets, the outer temperature of K2 mileage/car, the K3 speed of a motor vehicle/spacing, the K4 timing resets, and K5 adjusts and divides, when K6 adjusts, the application different according to system, the keyboard redefinable easily is suitable for new needs.

(7) real-time vehicle-mounted clock system

The utility model has adopted real-time vehicle-mounted clock circuit U10 PCF117IC, display mode system 12 hours optional every days is divided upper and lower noon or 24 hours system, itself has LCD and drives, and do not need outside LCD to drive, the accumulator of available automobile or dry cell power supply, the adjustment time can conveniently realize that circuit is simple, reliable, cheap, can be suitable on any motor vehicle widely with K4, K5, K6.

(8) reset circuit

The utility model has adopted unique U1 MAX6314 that designs specially for MC68HC (7) 11 series, guarantees U5 reset pin operate as normal need not add components and parts, so help the instrument miniaturization.

(9) power supply and light adjusting system

The utility model has adopted following mode to power: a kind of employing reduction voltage circuit U12 MC34063, produce output voltage V CC with the power supply of the power supply of automobile and be+5,0.6A, the supply voltage that the electronic circuit of confession instrument is used, another kind of voltage VT LM338 and U7 TPIC6B273 with the automobile confession produces adjustable voltage, for the used supply voltage of background light source.Real-time vehicle-mounted clock is powered with accumulator on the car or dry cell.

(10) input protection circuit

The utility model has adopted power-supply system; accumulator; single-chip processor i/os etc. have carried out transient protective; prevent simultaneously because of due to the operator carelessness; input end at electric current has adopted restorability fuse device R 12, R16, R17, RXE010 series, or powerful second tube sheet, reaches measures such as optocoupler U17--U21; special to automotive electronics instrument environment for use, particularly important to the generation and the prevention of mains fluctuations and transient overvoltage phenomenon.

(11) software

The integrated instrument of the utility model, and the software of truck-mounted computer mainly is made up of three parts: master routine, timer interrupt service routine, keyboard interrupt service routine.

Advantage of the present utility model:

(1) hardware is all optimized in electronic circuitry design and software programming, has fully used the affluent resources and the function of hardware.

(2) can be at strong sunlight, wide visual angle, high-contrast, LCD low temperature resistant and that use night shields.

(3) selected for use the coloured LED of high brightness to be fit to outdoor application, optical property is accurate, the long-life, and highly reliable, be not subjected to the LED of weather effect characteristics to make background light source, back light source brightness is provided with light adjusting circuit.

(4) have the vehicle computing machine multifunctional and show, vehicle-mounted LCD display, novel design is lucid and lively, clear.

(5) adopt the desirable thin film switch panel of high-tech, be beneficial to man-machine conversation.

(6) designed real-time vehicle-mounted clock, but its independent operating does not need that single-chip microcomputer is dried to give, also do not need outside lcd driver, self one-tenth system can be widely used in the different automobile types of automotive field.

(7) have the RS--232 serial port, for interactive means, help debugging or with the device talk of RS-232 style interface, also be equipped with the address that a slice U4 74HC373 latchs least-significant byte A0--A7, expand as system and use.

Description of drawings: Fig. 1 is that overall structure schematic diagram Fig. 2 of the present utility model is that electrical schematic diagram Fig. 3 of the present utility model is that single-chip microcomputer primary processor of the present utility model and control circuit figure Fig. 4 are that LCD drive circuit of the present utility model and electric power system figure Fig. 5 are that I/O circuit diagram Fig. 6 of the present utility model is that background light source power supply of the present utility model and light adjusting circuit figure Fig. 7 are that background light source structure chart Fig. 8 of the present utility model is that main program flow Fig. 9 of the present utility model is that T0 timer interrupt service routine Figure 10 of the present utility model is Lou service routine in the keyboard of the present utility model.

Further set forth for below drawings and Examples of the present utility model: present embodiment to the detailed description of contour structures as shown in Figure 1: two PCB electronic circuit boards 2 have been installed in instrument case 1, three anti-strong sunlights, wide visual angle, high-contrast, the vehicle-mounted liquid crystal display LCD3 and the anti-strong sunlight of low temperature resistant and night running, high brightness, long-life, coloured LED background light source 5, displaying symbol comprises on vehicle-carrying display screen 3: temperature outside the car (1), mileage shows (2), engine coolant temperature shows (3), left steering shows (4), the speed of a motor vehicle shows (5), right turn shows (6), engine speed shows (7), the securing band situation shows (8), air bag shows (9), fault shows (10), high beam shows (11), engine motor oil pressure shows (12), engine failure shows (13), service brake shows (14), the hand brake shows (15), dangerous show (16), anti-lock shows (17), real-time vehicle-mounted clock (18), amount of fuel shows (19), the car door situation shows (20), and the vehicle computing machine multifunctional shows that touch keyboard 4 is installed in the instrument case surface.

The installation that liquid crystal display LCD3 adds LED bias light source capsule 5 is as shown in Figure 7: with class's horse bar 6 liquid crystal display LCD3 is connected on thereon the press box support 7 on PCB electronic circuit board 2, install LED background light source 5 between the two additional, the supply voltage 8 of DC--DC conversion also is contained in the back side of pcb board 2.

Present embodiment instrumentation principle will details are as follows:

In the hardware electronic line design, optimize, its principle of work map interlinking 3, Fig. 4, Fig. 5, shown in Figure 6, the utility model instrument has been selected for use at aboundresources, function is strong, and the single-chip microcomputer U5MC68HC711E9 (it is lower to go up IC producer cost customized when in enormous quantities) that advanced technology is highly reliable is as the core of instrument and the demonstration of vehicle computing machine multifunctional, it is undertaking whole information acquisition, the control of information, information processing, the storage of information, functions such as driving and expansion.The utility model has been selected the extended mode of single-chip microcomputer for use.Signal controlling: be the RD/WR that sends out by U5, the E signal, the AS signal, the least-significant byte A0--A7 of address is that U4 74HC373 latch is latched by the AS signal, and data line DO--D7 and address wire A0-A7 are realized time-sharing operation, address wire A12--A15 is through U3 GAL16V8 address decoding and control and produce address gating signal CS1, CS2, CS3, CS4 and CK, RD, WR etc., signals collecting: be to come Information Monitoring by the switching manipulation on each sensor and the car, the input of switching value is that the switching value that collects through optocoupler U17--U21 TLP521--4 earlier becomes digital quantity through driver U13, U1474HC244 send data bus to single-chip microcomputer to go to handle; Rotating speed, vehicle speed signal collection are by the information that produces in the pulse transducer, through U22 LM139 etc. information are delivered to the IC1 of U5, IC3 confession processor processing through filtering, amplitude limit, amplification; The outer temperature of oil mass, water temperature and car is the analog quantity that collects by on the temperature sensor NTC, then the analog quantity that collects is converted to magnitude of voltage and is sent to the A/D input port AN0--AN3 of U5 for processor processing.Signal storage: when single-chip microcomputer with the signal that is collected, after treatment, the signal that has directly need be sent to demonstration, the signal that has should show and need preserve, as total kilometrage, truck-mounted computer function and black box record trouble, vehicle condition information etc. all are stored in the U5 sheet among the EEPROM easily, send to demonstration and be realized by LCD special purpose driver U11 MC145003.Audio alert and prompting are to deliver to sound circuit U8, U9 IS22C010 and audio amplifier circuit U16 LM386 and little loudspeaker SP1 by the U15 74HC374 buffering of U5 control to realize, real-time vehicle-mounted clock U10 PCF117IC, but independent operating own, also having the RS--232 serial port is that U21 CL232CP links to each other with the SCI mouth of single-chip microcomputer U5 by TXD, RXD signal wire, link to each other with PC by the DB25 socket, for usefulness such as debugging.

Claims

1, a kind of " motor vehicle intelligent multifunction liquid crystal instrument " is by watchcase 1, liquid crystal instrument display screen 3, the PCB electronic circuit board 2 of background light source LED box 5 and instrument and operation touch keyboard 4 are formed, it is characterized in that this instrument is by two PCB electronic circuit boards 2, three anti-strong sunlights, wide visual angle, high-contrast, low temperature resistant vehicle-mounted LCDs LCD3, three energy are to ultraviolet light a, the inhibition of b, and anti-strong sunlight, high brightness, the LED type bias light source capsule 5 that the long-life is coloured, one group of operation touch finger-board 4, they connect as one with zebra bar 6 and flat cable, are fixedly mounted in the instrument case 1 with instrument press box support 7, form the one-piece construction of instrument.The PCB electronic circuit board 2 of this instrument, IC circuit and electronic devices and components on it comprise: the core single-chip microcomputer master of instrument and truck-mounted computer locates into device U5 MC68HC711E9 and peripheral circuit thereof; Expansion a slice U474HC373 uses for expanding as the least-significant byte address latch; Expansion a slice U3 GAL16V8 is as pool, address sign indicating number and control; Expand two U13, U14 74HC244 and five U17--U21 TLP521--4 input circuit as Boolean value output sensor; Expansion a slice U22 LM139 is as pulsed quantity sensor input circuit; RT1--RT4 is as analog sensor NTC input circuit in expansion; Expansion a slice U11 MC145003 simplifies the special-purpose driving circuit of liquid crystal; Expansion a slice U1 MAX6314 reset circuit; Expand two U8, U9 IS22C010, U16, LM386 SP1 composition voice suggestion and warning circuit; Expansion R12, R16, R17 restorability fuse RXE010 series, the U17--U21 optocoupler is formed input protection circuit, expands two VT LM388 and U7 TPIC6B273 as instrument background light source power supply and light adjusting circuit; Expansion a slice U6 74HC07 is as attended operation touch keyboard circuit; Independently do not need the primary processor intervention and do not need the real-time vehicle-mounted clock circuit U5 PCF117IC of external LCD drive; Possesses the software programming of optimization.

2, motor vehicle intelligent multifunction liquid crystal instrument according to claim 1 is characterized in that vehicle-carrying display screen LCD3 goes up symbols displayed and comprises the outer temperature (1) of car, mileage shows (2), engine coolant temperature shows (3), left steering shows (4), the speed of a motor vehicle shows (5), right turn shows (6), engine speed shows (7), the securing band situation shows (8), air bag shows (9), fault shows (10), high beam shows (11), engine motor oil pressure shows (12), engine failure indication (13), service brake shows (14), the hand brake shows (15), dangerous show (16), anti-lock shows (17), real-time vehicle-mounted clock (18), amount of fuel shows (19), the car door situation shows (20), and the demonstration of vehicle computing machine multifunctional etc., touch keyboard 4 is installed in the instrument case surface.

3, motor vehicle intelligent multifunction liquid crystal instrument according to claim 1 is characterized in that the structure of LCDs is on pcb board 2, with class's horse bar 6 the liquid product are shielded on the LCD3 company press box support 7 thereon, install LED bias light source capsule 5 between the two additional, supply voltage 8 also is installed in the back side of pcb board 2.

4, motor vehicle intelligent multifunction liquid crystal instrument according to claim 1 is characterized in that being connected of monolithic primary processor U5 MC68HC711E9 and its peripheral circuit and moves work relationship is the RD/WR that is sent out by U5, the E signal, the AS signal, by address latch U4 74HC373, latch the least-significant byte address with the AS signal, reach data bus D0-D7 and low order address line A0-A7 time-sharing operation, address wire A12-A15 is through U3 GAL16V8 address decoding and control and produce gating signal CS1, CS2, CS3, CS4 and CK, signals such as RD WR, signals collecting is to come Information Monitoring by the switching manipulation on each sensor or the car, the input of switching value is to become digital quantity through driver U13 through optocoupler U17-U21 TLP521-4 earlier, the data bus D0-D7 that U1474HC244 delivers to single-chip microcomputer handles for single-chip microcomputer, rotating speed, to be the signal that produced by pulse transducer amplify the IC1 that U22 LM139 etc. delivers to signal U5 through the filtering amplitude limit in the vehicle speed signal collection, IC3 confession processor processing, oil mass, water temperature, the outer temperature of car is by the analog quantity that collects on the sensor NTC, then the analog quantity of gathering is converted to magnitude of voltage and deliver to the A/D input port AN0-AN3 of U5 for the single-chip microcomputer processing, when single-chip microcomputer with the signal that collects after treatment, what have will preserve as total kilometrage, truck-mounted computer function and black box record trouble, vehicle condition information etc. all is stored in the U5 sheet among the EEPROM easily, have except will preserving, also to send to the information of demonstration, realizing by LCD special purpose driver U11 MC145003. audio alert and prompting are to deliver to sound circuit U8 by the U15 74HC374 buffering of U5 control, U9 1S22C010 and audio amplifier circuit U16 LM386 and little loudspeaker SP1 realize, real-time vehicle-mounted clock U10 PCF117IC, but independent operating own, having the RS-232 serial port is that U2I CL232CP passes through TXD, the RXD signal wire links to each other with the SCI mouth of single-chip microcomputer U5, can link to each other with PC by the DB25 plug, for usefulness such as debugging.