The capacitive touch screen is a layer of transparent special metal conductive material on the surface of the glass. When the finger touches the metal layer, the capacitance of the contact changes, so that the frequency of the oscillator connected to it changes, and the touch position can be determined by measuring the frequency change. Since the capacitance varies with temperature, humidity, or grounding conditions, its stability is poor, and drift often occurs.
Resistive touch screen is a kind of sensor, which is basically a film plus glass structure. The adjacent side of the film and glass is coated with ITO (nano-indium tin metal oxide) coating. ITO has good conductivity and transparency. Sex. When touched, the ITO under the film will contact the ITO on the upper layer of the glass, and the corresponding electrical signal will be transmitted through the inductor, sent to the processor through the conversion circuit, and converted into X and Y values ​​on the screen by calculation, and the point is completed. The selected action is presented on the screen.
working principle:Capacitive Touch Panel CTP (Capacity Touch Panel) uses the current sensing of the human body to work. The capacitive screen is a four-layer composite glass screen. The inner surface of the glass screen and the interlayer are coated with a layer of ITO (nano-indium tin oxide). The outermost layer is a 0.0015mm thick bauxite protective layer with an interlayer ITO coating. As the working surface, four corners lead to four electrodes, and the inner layer of ITO is the screen layer to ensure the working environment.
The working principle of the resistive touch screen is mainly to realize the operation and control of the screen content through the principle of pressure sensing. The touch screen body part is a multi-layer composite film which is very compatible with the surface of the display, wherein the first layer is glass or plexiglass. The bottom layer, the second layer is a partition layer, the third layer is a multi-resin surface layer, and the surface is also coated with a transparent conductive layer, and the upper layer is covered with a plastic layer with a hardened surface and a smooth scratch-resistant outer surface.
In general, a capacitive touch screen is a human-computer interaction method that supports multi-touch. A conventional resistive touch screen can only perform single-point touch.
For example: Apple iphone, Nokia N8, Nokia E7 is a capacitive touch screen, you can use both hands to touch the screen at the same time to operate, web page browsing and other operations
Nokia 5800, n97; HTC d600 s90, 5230, etc. are resistive touch screens, which can only be operated at a single point.
The 7-inch tablet can be used as the golden size of a tablet computer. It is small and portable. It can be used at home and outdoors. You can browse the web, watch videos and play games. It is a household artifact. Although the size of the 7-inch tablet is inclined to the tablet, the function is more inclined to the mobile phone, so it can also be used as a substitute for the mobile phone. Compared with other sized tablets, the 7-inch tablet has obvious advantages in appearance and weight. Both the body size and the body weight have reached a very reasonable amount.
1.In appearance, the 7 inch tablet computer looks like a large-screen mobile phone, or more like a separate LCD screen.
2.In terms of hardware configuration, the 7 inch tablet computer has all the hardware devices of a traditional computer, and has its own unique operating system, compatible with a variety of applications, and has a complete set of computer functions.
3.The 7 inch tablet computer is a miniaturized computer. Compared with traditional desktop computers, tablet computers are mobile and flexible. Compared with Laptops, tablets are smaller and more portable
4.The 7 inch tablet is a digital notebook with digital ink function. In daily use, you can use the tablet computer like an ordinary notebook, take notes anytime and anywhere, and leave your own notes in electronic texts and documents.
7 Inches Tablet Pc,Quad Core Tablet 7 Inch,7 Inch Gaming Tablet,Supersonic Tablet 7 Inch
Jingjiang Gisen Technology Co.,Ltd , https://www.gisentech.com