CN202749076U - Intelligent LCD module control mainboard - Google Patents
Intelligent LCD module control mainboard Download PDFInfo
- Publication number
- CN202749076U CN202749076U CN201220415515.4U CN201220415515U CN202749076U CN 202749076 U CN202749076 U CN 202749076U CN 201220415515 U CN201220415515 U CN 201220415515U CN 202749076 U CN202749076 U CN 202749076U
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- circuit module
- memory
- module
- liquid crystal
- crystal display
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Abstract
The utility model relates to the electronic circuit field and provides an intelligent LCD module control mainboard provided with an ATMEGA 64A single-chip-microcomputer control-circuit module, a power-supply circuit module, an RS232 communication-circuit module, a backlight control-circuit module, a liquid-crystal-screen contrast-control circuit module, a liquid-crystal-screen drive-circuit module, a first memory, a second memory, an RS232 interface and a power supply interface. The power supply interface is connected with an input terminal of the power-supply circuit module. The power-supply circuit module supplies for the above circuit modules. The RS232 interface is connected with an input terminal of the RS232 communication-circuit module. The RS232 communication-circuit module, the backlight control-circuit module, the liquid-crystal-screen contrast-control circuit module, the liquid-crystal-screen drive-circuit module, the first memory and the second memory are connected with ports of the ATMEGA 64A single-chip-microcomputer control-circuit module. The utility model discloses the drive-control circuit mainboard for the LCD module.
Description
Technical field
The utility model relates to electronic circuit field, is mainly used in the Drive and Control Circuit mainboard 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.And man-machine switching equipment more is tending towards away from host computer control, and the displaying contents of working as figure is 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, utilize us that the specialty of LCD MODULE is driven knowledge, the utility model proposes a kind of Intelligent liquid crystal display module control mainboard, this control mainboard has been gathered the bottom layer driving of LCD MODULE, built-in ASCII character library, Hanzi font library, and 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.
The utility model adopts following technical scheme to realize:
Intelligent liquid crystal display module control mainboard, the control mainboard is provided with ATMEGA64A single chip machine controlling circuit module, the power circuit module, the RS232 communication circuit module, the backlight control circuit module, liquid crystal display contrast control circuit module, the liquid crystal display drive circuit module, first memory, second memory, and be provided with RS232 interface and power interface, power interface is connected in the input end of power circuit module, the power circuit module is above-mentioned each circuit module power supply, the RS232 interface is connected in the input end of RS232 communication circuit module, the RS232 communication circuit module, the backlight control circuit module, liquid crystal display contrast control circuit module, the liquid crystal display drive circuit module, first memory, second memory all is connected on the port of ATMEGA64A single chip machine controlling circuit module.
Wherein, the singlechip chip of ATMEGA64A single chip machine controlling circuit module 101 has been gathered the bottom layer driving of LCD MODULE, built-in ASCII character library, Hanzi font library and User Defined character library, also has the demonstration data buffer, be used for temporary and send showing that data are to the liquid crystal display drive circuit module, and have the data receiver buffer zone, be used for reception and temporary host computer by data and the control command of the transmission of RS232 interface.First memory is the bitmap memory block, is used for the storage bitmap data.Second memory is the Hanzi font library memory block, is used for storage 16 * 16 Hanzi font library data.
Further, described first memory and second memory are eeprom memories.
The utility model adopts above-mentioned technical scheme, has following technological merit:
(1) is 24 * 64 image display modules that use COG technique, can cooperates the white backlight of blast, realize that a kind of cost is low, the Intelligent liquid crystal display module of compact conformation;
(2) use large capacity, the technical grade single chip computer AT MEGA64A that reliability is relatively strong can have the RAM of 2K to be used as display memory, makes not have latency issue when refreshing whole picture;
(3) can receive that some are simple, be convenient to again show flexibly the instruction of control, can paint easily a little, straight line, rectangle, circle, dot patterns etc. make things convenient for host computer to the communication of display module and show control;
(4) support that multiple ascii character has, 6X8,8X16 can also show the 16X16 dot matrix Chinese character;
(5) adopt jumbo eeprom memory to come storage bitmap data and expansion Hanzi font library data, make things convenient for host computer to download font and the bitmap that is applicable to this module;
(6) use the RS232 serial communication module, the transmit port between display module and main frame becomes 2 pin serial transmissions by 13 original pin parallel transmissions, has greatly alleviated the hardware resource burden of host computer, and has improved communication reliability, and improved communication distance;
(7) can control display contrast of LCD screen and back light source brightness by the instruction of upper computer software.
Description of drawings
Fig. 1 is the circuit module connection layout of embodiment.
Fig. 2 is embodiment partial circuit schematic diagram.
Embodiment
Now with embodiment the utility model is further specified by reference to the accompanying drawings.
Consult illustrated in figures 1 and 2, the Intelligent liquid crystal display module control mainboard 1 of embodiment is provided with ATMEGA64A single chip machine controlling circuit module 101, power circuit module 102, RS232 communication circuit module 103, backlight control circuit module 104, liquid crystal display contrast control circuit module 105, liquid crystal display drive circuit module 106, first memory 1071, second memory 1072, and is provided with power interface 201 and RS232 interface 202.Power interface 201 is connected in the input end of power circuit module 102, power circuit module 102 is above-mentioned each circuit module power supply, comprises ATMEGA64A single chip machine controlling circuit module 101, RS232 communication circuit module 103, backlight control circuit module 104, liquid crystal display contrast control circuit module 105, liquid crystal display drive circuit module 106, first memory 1071 and second memory 1072.RS232 interface 202 is connected in the input end of RS232 communication circuit module 103.RS232 communication circuit module 103, backlight control circuit module 104, liquid crystal display contrast control circuit module 105, liquid crystal display drive circuit module 106, first memory 1071, second memory 1072 all are connected on the port of ATMEGA64A single chip machine controlling circuit module 101.
Wherein, the singlechip chip of ATMEGA64A single chip machine controlling circuit module 101 has been gathered the bottom layer driving of LCD MODULE, built-in ASCII character library, Hanzi font library and User Defined character library, also has the demonstration data buffer, be used for temporary and send showing that data are to liquid crystal display drive circuit module 106, and have the data receiver buffer zone, be used for reception and temporary host computer by data and the control command of 202 transmission of RS232 interface.First memory 1071 is the bitmap memory block, is used for the storage bitmap data.Second memory 1072 is the Hanzi font library memory block, is used for storage 16 * 16 Hanzi font library data.
Preferably, described first memory 1071 and second memory 1072 are eeprom memories.
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 (2)
1. Intelligent liquid crystal display module is controlled mainboard, it is characterized in that: the control mainboard is provided with ATMEGA64A single chip machine controlling circuit module, the power circuit module, the RS232 communication circuit module, the backlight control circuit module, liquid crystal display contrast control circuit module, the liquid crystal display drive circuit module, first memory, second memory, and be provided with RS232 interface and power interface, power interface is connected in the input end of power circuit module, the power circuit module is above-mentioned each circuit module power supply, the RS232 interface is connected in the input end of RS232 communication circuit module, the RS232 communication circuit module, the backlight control circuit module, liquid crystal display contrast control circuit module, the liquid crystal display drive circuit module, first memory, second memory all is connected on the port of ATMEGA64A single chip machine controlling circuit module.
2. Intelligent liquid crystal display module according to claim 1 is controlled mainboard, and it is characterized in that: described first memory and second memory are eeprom memories.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220415515.4U CN202749076U (en) | 2012-08-21 | 2012-08-21 | Intelligent LCD module control mainboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220415515.4U CN202749076U (en) | 2012-08-21 | 2012-08-21 | Intelligent LCD module control mainboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202749076U true CN202749076U (en) | 2013-02-20 |
Family
ID=47708439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220415515.4U Expired - Lifetime CN202749076U (en) | 2012-08-21 | 2012-08-21 | Intelligent LCD module control mainboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202749076U (en) |
-
2012
- 2012-08-21 CN CN201220415515.4U patent/CN202749076U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130220 |