The difference between the touchscreen and an LCD screen
A touchscreen is an electronic input device that users can control with single - or multi-touch gestures. A touch screen enables the user to interact directly with what is displayed, rather than using a mouse, touchpad, or any other intermediate device.
Some touch screens can be controlled with a finger; Others may require gloves with a specific type of coating, or use a special stylus.
In 1977, Ben Stumpe, a Danish electronics engineer, developed a prototype touchscreen. The development of multi-touch technology began in 1982, when the Input Research group at the University of Toronto introduced the first human-input multi-touch system. It uses a glass panel with a camera behind it. Then, in 1985, a team at the University of Toronto, including Bill Buxton, developed a multitouch tablet computer that used capacitors instead of bulky camera-based optical sensing systems.
Touch-screen devices are now the industry standard on most smartphones, tablets and a large percentage of laptops. Most homes will have at least one touchscreen device, and our customers are no exception.
Because of their popularity, these screens brake on one occasion. What many users fail to consider is that the touch screen and the actual LCD screen are two separate parts.
A touch screen (aka a digitizer) is a thin layer of transparent plastic that reads signals from touch and transmits them to a processing unit. It is the part that can be touched without disassembling the device.
An LCD screen is a panel inside the device that displays images. You can't access the LCD without first disassembling the device.
When only the touch screen fails, you can still see what's happening on the screen and the screen still works.
When only the LCD is broken, you can still use the touch screen, but the panel will have black spots or cobweb-like cracks (or both).
When both the LCD and touch screen are damaged, you may still be able to use part of the touch screen, and part of the LCD may display images, but there are significant difficulties with normal use of the device.