CN202255426U - TFT color screen virtual digital instrument - Google Patents
TFT color screen virtual digital instrument Download PDFInfo
- Publication number
- CN202255426U CN202255426U CN2011203653020U CN201120365302U CN202255426U CN 202255426 U CN202255426 U CN 202255426U CN 2011203653020 U CN2011203653020 U CN 2011203653020U CN 201120365302 U CN201120365302 U CN 201120365302U CN 202255426 U CN202255426 U CN 202255426U
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- Prior art keywords
- cpld
- tft
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- programmable logic
- logic device
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- Expired - Fee Related
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Abstract
The utility model relates to a TFT (Thin Film Transistor) color screen virtual digital instrument comprising an MCU (Microprogrammed Control Unit), wherein a signal input end of the MCU is respectively connected with an analog signal input circuit, a switching signal input circuit and a speed signal input circuit, a signal output end of the MCU is connected with a signal input end of a CPLD (Complex Programmable Logic Device), and a signal output end of the CPLD is connected with a TFT LCD (Liquid Crystal Display). According to the TFT color screen virtual digital instrument of the utility mode, the MCU performs judgements for an input analog signal, an input switching signal, and an input speed signal, and then transmits data to be displayed to the CPLD, and the CPLD drives the TFT LCD to display. It is thus clear that, the TFT color screen virtual digital instrument of the utility mode utilizes the MCU to realize data acquisition, and utilizes the CPLD to realize driving of the TFT LCD, therefore, the TFT color screen virtual digital instrument of the utility mode has the advantages of simple and reliable structure, and extremely high cost performance.
Description
Technical field
The utility model relates to the instrument field, especially a kind of TFT color screen virtual digit instrument.
Background technology
What at present, the automobile-used instrument of engineering machinery still adopted is pointer instrument.Pointer instrument implements than is easier to, and cost is relatively low, yet damages easily, and precision is relatively poor, and the single curing of display mode and content cannot be changed.The LCD display mode instrument that also occurs the STN of minute quantity on the market, this LCD Displaying Meter all are that monochromatic LCD shows that resolution is also lower, and the content that demonstration can be expressed is very single, because monochromatic demonstration, resolution is also lower, and display effect is relatively poor.
The utility model content
The purpose of the utility model is to provide a kind of good reliability, TFT color screen virtual digit instrument that cost is low.
For realizing above-mentioned purpose; The utility model has adopted following technical scheme: a kind of TFT color screen virtual digit instrument; Comprise microprocessor MCU; Its signal input part links to each other with analog signal input circuit, switching signal input circuit and GES input circuit respectively, and its signal output part links to each other with the signal input part of programmable logic device (CPLD), and the signal output part of programmable logic device (CPLD) links to each other with the TFT LCD display.
Can know by technique scheme; The utility model carries out judgment processing through microprocessor MCU to simulating signal, switching signal, the GES of importing; Microprocessor MCU will data presented transfer to programmable logic device (CPLD), shown by programmable logic device (CPLD) drive TFT LCD display.It is thus clear that the utility model is realized data acquisition by microprocessor MCU, programmable logic device (CPLD) is realized the driving of TFT LCD display, and simple and reliable for structure, cost performance is high.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model;
Fig. 2 is the circuit block diagram of microprocessor MCU among Fig. 1, programmable logic device (CPLD), TFT LCD display and storer SRAM;
Fig. 3,4 is respectively the circuit diagram of system power supply circuit, LCD power circuit.
Embodiment
A kind of TFT color screen virtual digit instrument; Comprise microprocessor MCU 1; Its signal input part links to each other with analog signal input circuit, switching signal input circuit and GES input circuit respectively; Its signal output part links to each other with the signal input part of programmable logic device (CPLD) 2; The signal output part of programmable logic device (CPLD) 2 links to each other with TFT LCD display 3, and is as shown in Figure 1, and power circuit 4 is respectively to microprocessor MCU 1, programmable logic device (CPLD) 2,3 power supplies of TFT LCD display.
Like Fig. 1, shown in 2, the output terminal of described analog signal input circuit, switching signal input circuit and GES input circuit links to each other the I of microprocessor MCU 1 with the I/O mouth of microprocessor MCU 1
2The I of C interface and programmable logic device (CPLD) 2
2C interface links to each other, and the signal output part of programmable logic device (CPLD) 2 links to each other with TFT LCD display 3, and described programmable logic device (CPLD) 2 links to each other with storer SRAM.Programmable logic device (CPLD) 2 passes through I
2The C communication mode reads the displays content data of microprocessor MCU 1 transmission, and programmable logic device (CPLD) 2 is continuous tired being placed among the storer SRAM of video data.Video data is full in storer SRAM; Programmable logic device (CPLD) 2 is read storer SRAM data again; The FPDP that sends to TFTLCD display screen 3 shows; Programmable logic device (CPLD) 2 is realized the sequential of TFT LCD display 3, is respectively CLK clock, HS line synchronizing signal, VS field sync signal, DB data.
Like Fig. 1, shown in 2, the simulating signal of 1 pair of analog signal input circuit of microprocessor MCU is gathered, and calculates the input analog amount size according to the AD value that collects, and calculates the meter dial value that will show and issues programmable logic device (CPLD) 2; The switching signal of 1 pair of switch signal input circuit of microprocessor MCU is gathered, and just can judge the state of switching signal according to the I/O value that reads, and issues programmable logic device (CPLD) 2 to the on off state that will show again; The switching signal of 1 pair of GES input circuit of microprocessor MCU is gathered, and just can extrapolate the speed of a motor vehicle according to the I/O level translation frequency values that reads, and issues programmable logic device (CPLD) 2 to the meter dial value that will show again.The I/O mouth of microprocessor MCU 1 is gathered these signal operations and is handled, through I
2The C communication interface is communicated by letter with programmable logic device (CPLD) 2, wanting content displayed to be transferred to programmable logic device (CPLD) 2, is shown by programmable logic device (CPLD) 2 drive TFT LCD displays 3.
Like Fig. 1,3, shown in 4; Described power circuit 4 is made up of system power supply circuit and LCD power circuit; Described system power supply circuit adopts 7805 three terminal regulators; Input termination+12V the direct current of 7805 three terminal regulators, the output terminal of 7805 three terminal regulators links to each other with microprocessor MCU 1, programmable logic device (CPLD) 2 and LCD power circuit respectively, and the 12V power supply of the outside input of system becomes the 5V direct current through 7805 three terminal regulators and gives microprocessor MCU 1 power supply; The LCD power circuit adopts the MC34064 boost DC-DC converter; The input end of MC34064 boost DC-DC converter links to each other with the output terminal of 7805 three terminal regulators; The output terminal of MC34064 boost DC-DC converter links to each other with TFT LCD display 3 ,+5V direct current through the MC34064 boost DC-DC converter become+the 19V direct current gives the power supply of TFT LCD display.
Claims (5)
1. TFT color screen virtual digit instrument; It is characterized in that: comprise microprocessor MCU (1); Its signal input part links to each other with analog signal input circuit, switching signal input circuit and GES input circuit respectively; Its signal output part links to each other with the signal input part of programmable logic device (CPLD) (2), and the signal output part of programmable logic device (CPLD) (2) links to each other with TFT LCD display (3).
2. TFT color screen virtual digit instrument according to claim 1; It is characterized in that: the output terminal of described analog signal input circuit, switching signal input circuit and GES input circuit links to each other with the I/O mouth of microprocessor MCU (1), the I of microprocessor MCU (1)
2The I of C interface and programmable logic device (CPLD) (2)
2C interface links to each other, and the signal output part of programmable logic device (CPLD) (2) links to each other with TFT LCD display (3).
3. TFT color screen virtual digit instrument according to claim 1, it is characterized in that: described programmable logic device (CPLD) (2) links to each other with storer SRAM.
4. TFT color screen virtual digit instrument according to claim 1 is characterized in that: power circuit (4) is respectively to microprocessor MCU (1), programmable logic device (CPLD) (2), TFT LCD display (3) power supply.
5. TFT color screen virtual digit instrument according to claim 4; It is characterized in that: described power circuit (4) is made up of system power supply circuit and LCD power circuit; Described system power supply circuit adopts 7805 three terminal regulators; Input termination+12V the direct current of 7805 three terminal regulators; The output terminal of 7805 three terminal regulators links to each other with the LCD power circuit with microprocessor MCU (1), programmable logic device (CPLD) (2) respectively; The LCD power circuit adopts the MC34064 boost DC-DC converter, and the input end of MC34064 boost DC-DC converter links to each other with the output terminal of 7805 three terminal regulators, and the output terminal of MC34064 boost DC-DC converter links to each other with TFT LCD display (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203653020U CN202255426U (en) | 2011-09-28 | 2011-09-28 | TFT color screen virtual digital instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203653020U CN202255426U (en) | 2011-09-28 | 2011-09-28 | TFT color screen virtual digital instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202255426U true CN202255426U (en) | 2012-05-30 |
Family
ID=46116653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203653020U Expired - Fee Related CN202255426U (en) | 2011-09-28 | 2011-09-28 | TFT color screen virtual digital instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202255426U (en) |
-
2011
- 2011-09-28 CN CN2011203653020U patent/CN202255426U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HEFEI GUOSHENG BATTERY TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHANG WENYA Effective date: 20130326 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130326 Address after: 105, room 1, building 79, 230088 science Avenue, Hefei hi tech Zone, Anhui, China Patentee after: HEFEI GUOSHENG BATTERY TECHNOLOGY CO., LTD. Address before: 105, room 1, building 79, 230088 science Avenue, Hefei hi tech Zone, Anhui, China Patentee before: Zhang Wenya |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20120928 |