CN2731866Y

CN2731866Y - All-function table keyboard

Info

Publication number: CN2731866Y
Application number: CN 200420029785
Authority: CN
Inventors: 叶晨; 陆作政
Original assignee: Tianjin Yaan Technology Electronic Co Ltd
Current assignee: Tianjin Yaan Technology Electronic Co Ltd
Priority date: 2004-09-23
Filing date: 2004-09-23
Publication date: 2005-10-05
Anticipated expiration: 2014-09-23

Abstract

The utility model belongs to an all-function table keyboard of the camera field. The utility model is characterized in that a control circuit is composed of a single chip computer, and through the corresponding interface of the single chip computer, the control circuit is connected to a matrix keyboard interface circuit, a communication module circuit, a rocking rod interface circuit, a display screen interface circuit, a keyboard address dialing switch, etc. The display screen interface circuit is a dot-matrix single color liquid crystal interface circuit, and the single chip computer is an eight-place single chip computer and is connected with a buzzer circuit and a real-time clock module circuit through the corresponding interface of the single chip computer. The utility model has simple structure and strong function and solves the problems existing in the table keyboard of the existing camera, being the substitute of the table keyboard of the existing camera.

Description

The global function desktop keyboard

Affiliated field

The utility model belongs to field of cameras, is used to control video camera, especially a kind of global function desktop keyboard.

Background technology

Employed in the market high speed monopod video camera, its control section are generally desktop keyboard control, are by this keyboard to set up, control video camera.Existing desktop keyboard adopts single-chip microcomputer to carry out the processing of signal data, carries out function setting via keyboard, and the result shows by the display screen on the key panel.Shortcoming is: the display screen on the existing key panel is monochromatic character type display mode, can only show numeral, so content displayed is fewer; In addition, keyboard is after use after a while, and bad phenomenon can appear contacting in keyboard button, and as by after the keyboard entry function instruction, whether the importer does not know will instruct and correctly import.In a word, existing desktop keyboard function weakness, displaying contents has limitation.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art part, provides a kind of simple in structure, powerful, the global function desktop keyboard that the display screen displaying contents is abundant.

The purpose of this utility model is achieved in that

Global function desktop keyboard described in the utility model, by panel, control circuit in housing and the housing constitutes, display screen is installed on the panel, three-dimensional rocker, keyboard, control circuit is also passed through the corresponding interface connection matrix keyboard interface circuit of this single-chip microcomputer by single-chip microcomputer, the communication module circuit, the rocking bar interface circuit, the display screen interface circuit, formations such as keyboard address toggle switch, the matrix keyboard interface circuit connects the keyboard on the panel, the rocking bar interface circuit connects the rocking bar on the panel, the display screen interface circuit connects the display screen on the panel, it is characterized in that: the display screen interface circuit is a dot matrix single color LCD interface circuit, and single-chip microcomputer is 8-bit microcontroller and connects a buzzer circuit and a real-time clock module circuit by its corresponding interface.

And described single-chip microcomputer is the AVR single-chip microcomputer.

And the display screen on the panel is the dot matrix single colour liquid crystal display.

And the chip that described real-time clock module adopts is the PCF8563T chip.

And described buzzer circuit adopts 555 vibration chips.

Advantage of the present utility model and good effect are:

1. display screen adopts the dot matrix type single colour liquid crystal display, has solved the problem that display screen can only the character display type effectively.Display screen not only can show numeral, also can show Chinese character, image etc., has increased the function of keyboard display screen.

2. in circuit, increased clock circuit, can on display screen, give clock and show.

3. can make the importer hear the accurately echo of input of keyboard by buzzer, improve the reliability of input instruction.

4. the utility model is simple in structure, and is powerful, solved the problem that existing video camera desktop keyboard exists, and is the substitute products of existing video camera desktop keyboard.

Description of drawings

Fig. 1 is a schematic appearance of the present utility model;

Fig. 2 is the left view (broken section) of Fig. 1;

Fig. 3 is a control circuit block diagram of the present utility model;

Fig. 4 a is the interface schematic diagram (linking to each other with keyboard address toggle switch) of single-chip microcomputer among the utility model control circuit figure;

Fig. 4 b is a communication module circuit diagram among the utility model control circuit figure;

Fig. 4 c is peripheral hardware connecting circuit figure among the utility model control circuit figure;

Fig. 4 d is rocking bar interface circuit figure among the utility model control circuit figure;

Fig. 4 e is a display screen interface circuit diagram among the utility model control circuit figure;

Fig. 4 f is a real-time clock module circuit diagram among the utility model control circuit figure;

Fig. 4 g is buzzer circuit figure among the utility model control circuit figure;

Fig. 4 h is a matrix keyboard circuit diagram among the utility model control circuit figure.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail:

This global function desktop keyboard, referring to Fig. 1, Fig. 2, constitute by the display screen of installing on panel 1, the panel 2, keyboard 3, three-dimensional rocker 4 and the housing 5 that is interlockingly connected with panel, the control circuit board 6 in the housing, display screen is 320 * 240 dot matrix single colour liquid crystal displays, keyboard has four groups, and various functional switches can be set respectively.

As central processing unit, single-chip microcomputer links to each other with the circuit of each difference in functionality by its corresponding interface control circuit (referring to serial circuit diagrams such as Fig. 3, Fig. 4 a) by single-chip microcomputer U1.Among Fig. 4 a the circuit diagram that links to each other with keyboard address toggle switch, toggle switch S2 in this circuit diagram, the resistance R 1 in this toggle switch circuit, R2 are the terminal resistance of impedance matching; The resistance R 3 that links to each other with single-chip microcomputer 20 pin is reset resistor, and the oscillation source circuit that links to each other with single-chip microcomputer 23,23 pin is made of crystal oscillator Y1, capacitor C 1, C2.Above-mentioned single-chip microcomputer is eight AVR single-chip microcomputers.

Fig. 4 b is the communication module circuit diagram, is that two groups of circuit constitute, and module U2, U3 are the RS485 module, are used for level conversion, and the signal that sends to The Cloud Terrace is controlled.Diode TZ1, TZ2, TZ3, TZ4, TZ5, TZ6 are the transition diode in this circuit, and insurance PT1, PT2, PT3, PT4 with auto restore facility also are installed in this circuit.

Fig. 4 c is peripheral interface circuit figure, is used for the signal after handling is shown or processing at peripheral hardware.Constitute by module U4-RS232, capacitor C 3, C4, C5, C6, C7.

Fig. 4 d is the rocking bar interface circuit, and the rocking bar on the control panel, this rocking bar are three-dimensional rocker.Filter capacitor C8, C9, C10 are arranged on this interface circuit.

Fig. 4 e is the display screen interface circuit, and this circuit is a dot matrix single color LCD interface circuit, and this circuit connects the display screen on the panel, and this display screen is 320 * 240 dot matrix single colour liquid crystal displays.

Fig. 4 f is a buzzer circuit, is made of 555 vibration chip U6, frequency of oscillation resistance R 6, R7, capacitor C 14, C15, C15, and this circuit is sent the sound that matrix keyboard triggers by buzzer LS2.

Fig. 4 g is the real-time clock module circuit, and the chip that this real-time clock module U5 adopts is the PCF8563T chip.This circuit is made of real-time clock module, resistance R 4, R5, capacitor C 11, C12, C13, crystal oscillator Y2, diode D1, D2, by this circuit can be on display screen read clock information.This circuit has self-powered BT1.

Fig. 4 h is the matrix keyboard interface circuit, and this circuit is gone here and there out chip U7 (model is 74LS165) and connected single-chip microcomputer by incorporating into, and this circuit connects the keyboard on panel.

Claims

1. global function desktop keyboard, by panel, control circuit in housing and the housing constitutes, display screen is installed on the panel, three-dimensional rocker, keyboard, control circuit is also passed through the corresponding interface connection matrix keyboard interface circuit of this single-chip microcomputer by single-chip microcomputer, the communication module circuit, the rocking bar interface circuit, the display screen interface circuit, formations such as keyboard address toggle switch, the matrix keyboard interface circuit connects the keyboard on the panel, the rocking bar interface circuit connects the rocking bar on the panel, the display screen interface circuit connects the display screen on the panel, it is characterized in that: the display screen interface circuit is a dot matrix single color LCD interface circuit, and single-chip microcomputer is 8-bit microcontroller and connects a buzzer circuit and a real-time clock module circuit by its corresponding interface.

2. global function desktop keyboard according to claim 1 is characterized in that: described single-chip microcomputer is the AVR single-chip microcomputer.

3. global function desktop keyboard according to claim 1 is characterized in that: the display screen on the panel is the dot matrix single colour liquid crystal display.

4. global function desktop keyboard according to claim 1 is characterized in that: the chip that described real-time clock module adopts is the PCF8563T chip.

5. global function desktop keyboard according to claim 1 is characterized in that: described buzzer circuit adopts 555 vibration chips.