How the touch chip works,How many chips does the touch chip have

发布时间:2023-09-21 16:42
作者:AMEYA360
来源:网络
阅读量:2063

  A touch chip is a microprocessor that can sense human touch and can convert human touch operations into electrical signal input that can be read by a computer. It is widely used in various digital devices such as mobile phones, tablets, and smart watches, and has become an indispensable part of modern electronic products.

How the touch chip works,How many chips does the touch chip have

  “Touch” specifically refers to single-point or multi-point touch technology; the chip is an IC, which refers to a metal or non-metal sheet whose end surface can be integrated with the friction lining and friction material layer, and a circuit module that integrate a variety of electronic components on a silicon board to achieve a specific function. It is the most important part of electronic equipment, responsible for computing and storage functions. The application scope of integrated circuits covers almost all electronic equipment for military and civilian. A small piece of silicon containing integrated circuits, often is a part of a computer or other device.

  Touch chip, also called touch IC. “Touch” refers to single or multi-touch technology. The touch chip is located between the touch sensor and the PC/or embedded system controller. The chip can be mounted on a controller board inside the system or placed on a flexible printed circuit (FPC) attached to the glass touch sensor. The chip extracts information from the touch sensor and converts it into information that the PC or embedded system controller can understand. Most touch chips now use the capacitive effect, that is, the proximity of the human body will increase the capacitance, thereby changing the original oscillation frequency or changing the charge and discharge time of the RC circuit.

  How the touch chip works

  This is achieved by sensing capacitance changes caused by human touch. When the human body approaches the touch screen surface, it will cause the capacitance between the touch screen and the human body to change, and a new electric field distribution will be formed. The chip will calculate the specific touch position and operation gesture based on this capacitance change. This process requires the use of a series of advanced sensor technologies, signal processing, algorithm optimization and other technologies to achieve high precision and sensitivity.

  Touch chips basically use four multi-touch technologies

  1. “LLP (laser light plane) technology” mainly uses infrared laser equipment to project infrared rays onto the screen. When the screen is blocked, infrared light is reflected, and a camera under the screen captures where the reflection goes. After systematic analysis, a response can be made.

  2. “FTIR (Frustrated Total Internal Reflection) technology” will add LED light to the interlayer of the screen. When the user presses the screen, the light in the interlayer will cause different reflection effects. The sensor will receive the changes in light and capture the point of force application to react.

  3. “ToughtLight technology” uses projection method to project infrared rays onto the screen. When the screen is blocked, infrared light is reflected, and a camera under the screen captures where the reflection goes. After systematic analysis, a response can be made.

  4. “Optical Touch technology”, which has a lens at each end of the top of the screen to receive the user’s gesture changes and the position of the touch point. After calculation, it is converted into coordinates and then reacted.

  How many chips does the touch chip have?1. Capacitive touch chip: Uses the capacitive principle to detect charge changes on the touch screen, with high accuracy, fast response, and supports multi-touch.

  2. Resistive touch chip: It uses the principle of resistance to detect voltage changes on the touch screen. It is cheap, but does not support multi-touch, has low accuracy and short service life.

  3. Acoustic wave touch chip: Uses acoustic wave sensors to detect sound reflections on the touch screen, which can support non-contact touch, but is sensitive to environmental noise and other interference.

  4. Optical touch chip: Using optical sensors to detect optical changes on the touch screen has high accuracy, but is expensive and not suitable for large-scale applications.

  5. Pressure-sensitive touch chip: Uses a pressure-sensitive sensor to detect pressure changes on the screen and supports multi-touch, but the price is higher.

(备注:文章来源于网络,信息仅供参考,不代表本网站观点,如有侵权请联系删除!)

在线留言询价

相关阅读
  • 一周热料
  • 紧缺物料秒杀
型号 品牌 询价
RB751G-40T2R ROHM Semiconductor
MC33074DR2G onsemi
TL431ACLPR Texas Instruments
BD71847AMWV-E2 ROHM Semiconductor
CDZVT2R20B ROHM Semiconductor
型号 品牌 抢购
BP3621 ROHM Semiconductor
ESR03EZPJ151 ROHM Semiconductor
IPZ40N04S5L4R8ATMA1 Infineon Technologies
TPS63050YFFR Texas Instruments
BU33JA2MNVX-CTL ROHM Semiconductor
STM32F429IGT6 STMicroelectronics
热门标签
ROHM
Aavid
Averlogic
开发板
SUSUMU
NXP
PCB
传感器
半导体
相关百科
关于我们
AMEYA360微信服务号 AMEYA360微信服务号
AMEYA360商城(www.ameya360.com)上线于2011年,现 有超过3500家优质供应商,收录600万种产品型号数据,100 多万种元器件库存可供选购,产品覆盖MCU+存储器+电源芯 片+IGBT+MOS管+运放+射频蓝牙+传感器+电阻电容电感+ 连接器等多个领域,平台主营业务涵盖电子元器件现货销售、 BOM配单及提供产品配套资料等,为广大客户提供一站式购 销服务。