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LCD Module Interface Information


This section will provide additional information on how to use the different interfaces that are present on the LCD Modules from Pacific Display Devices.

  LCD Interface Overview:
There are four basic types of interfaces you select when integrating an Liquid Crystal Display into your product, They are:

LCD Interface Overview - LCD Glass and LCD Modules

1. External LCD Controller and Drivers.  (LCD Glass) This level is the basic level where you are responsible to provide the complex AC waveform that will control the status of the opacity of each segment/dot on the Liquid Crystal Display. This can be done by specialized driver chips typically used for stand-alone Liquid Crystal Display Glass (non-module) applications, which come as an individual ICs, or integrated into a microprocessor IC.

2. LCD Drivers w/ CPU Embedded Controller.  (LCD Module) The module needs complex AC voltage waveforms for the LCDs and require an controller external to the module to keep refreshing the individual pixel information to their drive circuitry. The configuration uses a controller integrated into your microprocessor.

3. Integrated LCD Controller & Drivers.  (LCD Module) These ICs interface to the customers data bus and allow the user to specify the status of the pixels in the LCD Module display.  These ICs will take care of all of the house keeping and refresh activities.  These ICs are integrated into the LCD Modules made by Pacific Display Devices.

4. LCD Drivers w/ External Controller.  (LCD Module) The module needs complex AC voltage waveforms for the LCDs and require an controller external to the module to keep refreshing the individual pixel information to their drive circuitry. The configuration uses an  controller IC that will interface to your microprocessor on you PCB.

Controller and Driver ICsPacific Display Devices offers a reference library of the standard LCD Controller and Driver ICs for your product design.  It contains data sheets of LCD ICs you can use to control a Glass Only design, and ICs that are used in Pacific Display Devices LCD Modules.


  Character Module Interface - Magazine Tutorial:
Here is a reprint of an article offered by Everyday Practical Electronics (February and March 1997).  It offers a pretty complete tutorial by describing in detail on how to use the standard parallel interface to control a Character Display Module.  This article is in two pdf files, part 1 and part 2, and both can be downloaded below:

How to use a Character Display Module - Part 1
How to use a Character Display Module - Part 1


How to use a Character Display Module - Part 2
How to use a Character Display Module - Part 2


 


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Whatever your design needs, Pacific Display Devices has the LCD display solution


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