CN202749075U

CN202749075U - LCD module

Info

Publication number: CN202749075U
Application number: CN201220415324.8U
Authority: CN
Inventors: 林金吉; 黄福星; 王凯
Original assignee: Xiamen Ocular Optics Co Ltd
Current assignee: Xiamen Ocular Optics Co Ltd
Priority date: 2012-08-21
Filing date: 2012-08-21
Publication date: 2013-02-20
Anticipated expiration: 2022-08-21

Abstract

The utility model relates to the electric circuit field and is mainly used for a drive circuit of an LCM. The LCM provided by the utility model comprises an ATMEGA 64A single-chip-microcomputer control circuit, a communication interface circuit, a liquid-crystal-screen driving chip, a boost circuit, a liquid-crystal-screen contrast-control circuit, an LED indicating-lamp circuit, a serial-in-parallel-out shift register, an inverter, a parallel-in-serial-out shift register, a button panel and a liquid crystal screen. By using the ATMEGA 64A high-capacity single-chip-microcomputer, the LCM collects underlying drive of the LCM, a built-in ASCII character database, a Chinese character database and a user-defined character database. Simple command is used to realize display operation of texts and 2D figures. The LCM can realize to use software to control backlight brightness and contrast of the liquid crystal display screen.

Description

LCD MODULE

Technical field

The utility model relates to electronic circuit field, is mainly used in the driving circuit of LCD MODULE (LCM).

Background technology

Along with the fast development of electronic product, more requirements have been proposed opertaing device, particularly man-machine switching equipment, requirement LCM(LCD MODULE) displaying contents has not been simple a few row words that show, but picture is abundanter, and the interface is more friendly, graphic display mode with better function.When the graphical display content of LCM more, transmitted data amount also will significantly rise, can take so a large amount of software and hardware resources of main process equipment, particularly common image display module is not to be with character library, and the developer of equipment will need to spend a large amount of energy to develop.

The utility model content

Therefore, the utility model proposes a kind of improved LCD MODULE, can allow LCM directly call demonstration by the character library that carries, and need not too much to take the software and hardware resources of main process equipment, more meet man-machine switching equipment and be tending towards development trend away from host computer control.

The utility model adopts following technical scheme to realize:

LCD MODULE, comprise the ATMEGA64A single chip machine controlling circuit, communication interface circuit, liquid crystal display drives chip, booster circuit, the liquid crystal display contrast control circuit, the LED light circuit, SI PO shift register, phase inverter, incorporate into and go here and there out shift register, key panel, liquid crystal display, wherein, communication interface circuit is connected in the data receiver port of ATMEGA64A single chip machine controlling circuit, liquid crystal display drives the control port that chip is connected in the ATMEGA64A single chip machine controlling circuit, the driving port that liquid crystal display drives chip is connected to liquid crystal display, liquid crystal display drives chip and also is connected to booster circuit, booster circuit is connected in the liquid crystal display contrast control circuit, the output port of liquid crystal display contrast control circuit is connected to liquid crystal display, the control port of ATMEGA64A single chip machine controlling circuit is connected in the input port of SI PO shift register, the output port of SI PO shift register is connected in the LED light circuit, key panel is connected in to incorporate into goes here and there out shift register, incorporate into and go here and there out shift register and be connected to phase inverter, the output port of phase inverter is connected in the input port of ATMEGA64A single chip machine controlling circuit.

The utility model adopts above-mentioned technical scheme, by using the large capacity single sheet machine of ATMEGA64A, the bottom layer driving of having gathered LCD MODULE, built-in ASCII character library, Hanzi font library, with the User Defined character library, use simple order to realize demonstration and the 2D graphical display manipulation of text, can realize the contrast of software control backlight illumination and LCDs.Thereby need not too much to take the software and hardware resources of main process equipment, more meet man-machine switching equipment and be tending towards development trend away from host computer control.

Description of drawings

Fig. 1 is the circuit module connection layout of embodiment.

Fig. 2 is the partial circuit schematic diagram of embodiment.

Embodiment

Now with embodiment the utility model is further specified by reference to the accompanying drawings.

Consult Fig. 1, the LCD MODULE of embodiment, comprise ATMEGA64A single chip machine controlling circuit 1, communication interface circuit 11, liquid crystal display drives chip 2, booster circuit 3, liquid crystal display contrast control circuit 4, LED light circuit 6, SI PO shift register 7, phase inverter 8, incorporate into and go here and there out shift register 9, key panel 10, liquid crystal display 5, wherein, communication interface circuit 11 is connected in the data receiver port of ATMEGA64A single chip machine controlling circuit 1, liquid crystal display 5 drives the control port that chip 2 is connected in ATMEGA64A single chip machine controlling circuit 1, the driving port that liquid crystal display drives chip 2 is connected to liquid crystal display 5, liquid crystal display drives chip 2 and also is connected to booster circuit 3, booster circuit 3 is connected in liquid crystal display contrast control circuit 4, the output port of liquid crystal display contrast control circuit 4 is connected to liquid crystal display 5, the control port of ATMEGA64A single chip machine controlling circuit 1 is connected in the input port of SI PO shift register 7, the output port of SI PO shift register 7 is connected in LED light circuit 6, key panel 10 is connected in to incorporate into goes here and there out shift register 9, incorporate into and go here and there out shift register 9 and be connected to phase inverter 8, the output port of phase inverter 8 is connected in the input port of ATMEGA64A single chip machine controlling circuit 1.

Consult shown in Figure 2ly, these circuit theory diagrams are to have comprised ATMEGA64A single chip machine controlling circuit 1, LED light circuit 6, SI PO shift register 7, phase inverter 8, incorporate into and go here and there out the circuit theory diagrams of shift register 9, key panel 10 parts.And liquid crystal display drives chip 2, booster circuit 3, the 4 employing available circuits realizations of liquid crystal display contrast control circuit, and communication interface circuit 11 also can adopt available circuit to realize, such as the RS232 interface circuit.

The ATMEGA64A chip of the ATMEGA64A single chip machine controlling circuit 1 among the embodiment is large capacity single sheet machine, the bottom layer driving of having gathered LCD MODULE, built-in ASCII character library, Hanzi font library, with the User Defined character library, use simple order to realize demonstration and the 2D graphical display manipulation of text, can not only realize the contrast of software control backlight illumination and LCDs, can also expand touch function.

Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; within not breaking away from the spirit and scope of the present utility model that appended claims limits; can make a variety of changes the utility model in the form and details, be protection domain of the present utility model.

Claims

1. LCD MODULE, comprise the ATMEGA64A single chip machine controlling circuit, communication interface circuit, liquid crystal display drives chip, booster circuit, the liquid crystal display contrast control circuit, the LED light circuit, SI PO shift register, phase inverter, incorporate into and go here and there out shift register, key panel, liquid crystal display, wherein, communication interface circuit is connected in the data receiver port of ATMEGA64A single chip machine controlling circuit, liquid crystal display drives the control port that chip is connected in the ATMEGA64A single chip machine controlling circuit, the driving port that liquid crystal display drives chip is connected to liquid crystal display, liquid crystal display drives chip and also is connected to booster circuit, booster circuit is connected in the liquid crystal display contrast control circuit, the output port of liquid crystal display contrast control circuit is connected to liquid crystal display, the control port of ATMEGA64A single chip machine controlling circuit is connected in the input port of SI PO shift register, the output port of SI PO shift register is connected in the LED light circuit, key panel is connected in to incorporate into goes here and there out shift register, incorporate into and go here and there out shift register and be connected to phase inverter, the output port of phase inverter is connected in the input port of ATMEGA64A single chip machine controlling circuit.