Touch sensor chip applied in touch screen of remote control

The remote control is a wireless transmitting device, which encodes the button information through modern digital coding technology, emits light waves through infrared diodes, and converts the received infrared signals into electrical signals through the infrared receiver of the receiver, and then enters the processor Decode and demodulate the corresponding instructions to achieve the operation requirements for controlling the set-top box and other equipment to complete. The touch screen (Touch Panel), also known as "touch screen" or "touch panel", is an inductive liquid crystal display device that can receive input signals such as contacts. The tactile feedback system can drive various connecting devices according to the pre-programmed program, which can be used to replace the mechanical button panel, and create vivid audio-visual effects through the liquid crystal display screen.

With the continuous development of touch technology, the reliability and practicability of touch sensing chips will be further improved. Introducing the touch screen into the interaction of the smart remote control makes it more convenient and personalized for users to experience the smart remote control.
The working part of the touch screen generally consists of three parts, two transparent resistive conductor layers, an isolation layer between the two conductor layers, and electrodes. The resistive conductor layer is composed of resistive materials such as indium tin oxide (ITO) coated on the substrate, the upper substrate is made of plastic, and the lower substrate is made of glass. The isolation layer is a viscous insulating liquid material such as Mylar. The electrode is made of materials with excellent conductivity (such as silver powder ink), and its conductivity is about 1000 times that of ITO.
When the touch screen is working, the upper and lower conductor layers are equivalent to a resistor network. When a voltage is applied to a certain layer of electrodes, a voltage gradient will be formed on the network. If there is an external force that makes the upper and lower layers contact at a certain point, the voltage at the contact point can be measured on the other layer where the electrode is not voltage-applied, so that the coordinates of the contact point can be known.
Touch sensing can realize the detection of touch. On the basis of capacitive touch sensing, it can support multi-touch and gesture operation. With the mature development of touch technology, various touch sensing products have been born one after another. The applications involve smart door locks, consumer Electronics, kitchen appliances, bathroom appliances, air conditioners and other household appliances are inseparable from our lives.
The capacitive touch chip integrates a high-resolution touch detection module and a dedicated signal processing circuit to ensure that the capacitive touch chip has a sensitive automatic identification and tracking function for environmental changes. Capacitive touch chips must also meet users' high experience requirements in terms of stability, sensitivity, power consumption, response speed, waterproof, operation with water, anti-vibration, and anti-electromagnetic interference in complex applications. In order to facilitate the user to independently control the sensitivity of the touch key in the application, the capacitive touch chip also sets the sensitivity control bit.