Question

Typed please. Discuss the features and control of the LCD. Discuss features and control of the keypad. Research LCD modules—what are the different types of LCD modules, and how do you control them?

Answer 1

LCD means the liquid crystal display which are advanced inventions of modern time

The features of LCD are

It consumes less power

Show good picture quality

Very portable

Control of LCD

The LCD have a parallel interface, meaning that the microcontroller has to manipulate several interface pins at once to control LCD display

The interface consists of following pins:

A register select pin that controls where in LCD memory you are writing data to

A read write pin that can select reading mode or writing mode

An enable pin that can enables the writing to the registers

It has 8 data pins these are status pins

There also a voltage control pin to give power

Features of keyboard

A keyboard contains numbers of keys, buttons or levers, which activate hammers plectra, pads or other devices for playing musical notes.

A row of keys is conventionally called a manual. Certain instruments - like organs - may have several manuals arranged in echelon.

Mechanisms activated by keyboards include strings, reeds, pipes, bells and electronic instruments.

Keyboards are usually arranged in a linear or curvilinear pattern so they may be easily accessed by a player. The dimensions, now largely standardised, permit separation between fingers or feet.

A keyboard operated by the feet is conventionally called a pedal board and has larger dimensions appropriate to the feet.

Keyboards are usually arranged in a conventional pattern differentiating between certain notes. For example on keyboards used for Western music accidentals have a different colour and different positioning to other notes.

Keys may be given different responses to touch by being sprung, balanced, and or weighted.

The force or velocity applied to keys may be interpreted by mechanisms or sensors in different ways that interpret attack, volume or swell

Controls of keyboard

There are so many controls of keyboard. Some of them are

Ctrl + S: Save
Ctrl + O: Open
Ctrl + T: Open tab
Ctrl + W: Close
window (or tab)Alt + F4: Exit application
Ctrl + C: Copy
Ctrl + V: Paste
Ctrl + F: Find

Different types of LCD modules are

1.twisted nemanic LCD

2.ips panel technology

3.vertical alignment LCD module

4.advanced fridge field switching

To control these devices we can connect them to external divices