LCD displays with touch screen are used in more and more applications. Here is a simple example on how touch screen is implemented.
Here are some website links for reference.
PWM is used in a variety of applications including sophisticated control circuitry, LCD backlight control is one of the applications.
LCD display looks lighter (blur) when the temperature drops; while the background appears 'ghosting' when the temperature increases.
Everyday, most of us will look at a LCD screen at least once. Different types of LCD panels have different characteristics.
Touch screens are everywhere nowadays; cell phones, ATM, vending machines all use touch panels. And there are five most common types.
When designing a product with LCD display, engineer needs to make many decisions. One of them is which display interface to use.