Touch screens are increasingly used on electronic devices, we can find touch screens in phones , tablets , laptops, even desktops or many other devices. . Current popular touch technology is capacitive touch.
In 2007, Apple made the most important step in touch technology: the iPhone debuted with a focus on large (at the time) touchscreen. The launch of the iPhone completely changed the face of the mobile industry, leading to the introduction of other mobile operating systems such as Android and Windows Phone . And the iPhone is also a pioneer in capacitive touch technology.
Capacitive touch is a touch technology based on the changes in electrical charge on the screen when lightly touched by a person's hand, or objects with charged charges.
In essence, capacitive touch can be divided into 2 types: One is single-point touch, can only receive up to 1 touch during operation. And two are multi-touch. Apple, though not the maker or the first to use capacitive touch, has made it popular and is steadily increasing its market share in touchscreen technology.
Capacitive touch screens use a metal ion-coated glass panel to allow up to 90% more light to pass through. Thanks to that, the display is clearer. The metal ion layer on the glass surface creates a network of capacitors on the screen. These capacitors lose their charge when touching human hands or objects with electricity, so the system containing the display will determine where this change takes place and proceed with the user's actions. . As a result, the touch screen of this type can be controlled by very light "touch" from the finger, but usually you cannot use it with hardware or wearing gloves.
The capacitive touch screen is highly accurate and reliable, so it is widely used in today's phones and tablets. Touch capacitance is no need to force acting on the sensing layer should be sensitive and felt much the same point at a time.
Advantages:
The screen can be scratch-resistant, sweat-resistant and dust-proof.
Capacitive touch is the touch based on the electrical charge in the hand and the touch point on the screen so it is lighter, faster and more sensitive.
+ Can develop multi-point.
+ High screen life.
+ For better brightness.
Defect:
+ High cost.
+ Can not use hard objects to touch, such as pen, toothpick ... or when wearing gloves can not work.
With its fast, responsive and high accuracy, capacitive touch screens are being used in many different fields. In addition, the support for complex operations such as drag, drop, flip and multi-touch also makes this touch technology a success. In particular, they are the leading touch technology in the world of portable entertainment devices, typically smartphones.
+ On all Apple phone products such as: iPhone , iPad
+ High-end phones from brands such as Samsung , HTC , LG , Oppo , Sony , Asus ...
Since Windows 8, Microsoft has also developed the operating system with a focus on touch screens , leading to the launch of a series of tablet-hybrid laptop models (laptops with touch screens, separate keyboards).
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