Cheap cell phones' Touch Screen Technology, A Cellular Country Review

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Drag the items, perhaps click or rather move the figure for a better view. Nowadays, we can have it all in just a click or a twist. Good photos, best movie outputs, electronic book reads and all those other stuff can be accessed in just a tap and take note, without the hassle of an external device called "mouse".

Cheap cell phones' touch screen technology is considered to be one of the smartest creations in the technological dimension. Seen in almost every smaller consumer device such as the #CheapCellPhones, computers and handheld gaming tools, the touch screen is a love.

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Cheap cell phones' Touch Screen Technology, A Cellular Country Review - Video Transcript

Cheap cell phones' Touch Screen Technology
A Cellular Country Review

Touch Screen: Defined
A touch screen is a computer display screen that is also an input device. The screens are sensitive to pressure; a user interacts with the computer by touching pictures or words on the screen.

Touch Screen: History
1965 - 1967 : the first capacitive touch screen invented by E.A. Johnson
1971 : Elograph, a not yet transparent touch sensor, developed by Doctor Sam Hurst
1974 : the first true transparent touch screen developed by Sam Hurst and Elographic
1977 : the first resistive touch screen by Elographics
: the first curved glass touch sensor
1983 : HP-150, the first computer with touch screen technology by HP
1990s : smart phones and handhelds with touch screen technology
1993 : the Newton PDA by Apple
: Simon, the first smart phone by IBM
1996 : Palm entered the PDA market and advanced touch screen technology with its Pilot series.
2002 : Windows XP Tablet by Microsoft
2007 : Apple introduced the king of smart phones, the iPhone, with nothing but touch screen technology.

Parts of Touch Screen System
A touch screen sensor is a clear glass panel with a touch responsive surface. The touch sensor/panel is placed over a display screen so that the responsive area of the panel covers the viewable area of the video screen.

The controller connects between the touch sensor and the PC. It takes information from the touch sensor and translates it into information that PC can understand.

The software driver allows the touch screen and computer to work together. It tells the computer's operating system how to interpret the touch event information that is sent from the controller.

Types of Touch Screen
Resistive touch screen
Capacitive touch screen
Infrared touch screen
Surface acoustic wave (SAW) touch screen
Strain gauge touch screen
Optical imaging touch screen
Dispersive signal technology touch screen

Resistive Touch Screen
- Cost effective solutions
- Activated by a stylus, a finger or gloved hand
- Not affected by dirt, dust, water, or light
- 75%~85% clarify
- resistive layers can be damaged by a very sharp object

Surface Wave Touch Screen
Surface wave technology uses ultrasonic waves that pass over the touch screen panel. When the panel is touched, a portion of the wave is absorbed.

Capacitive Touch Screen
- Durable and resistant to scratches for demanding applications
- Faster and more responsive
- Immune to surface contaminants
- Superior optical clarity, brighter display and less surface reflection
- Must be touched by finger, will not work with any non-conductive input

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