Sensors in Smart Phone

The technological innovation in electronics makes nowadays mobile phone more than a simple communication tool: it becomes a portable electronic device with integrated functions, such as listening to music, watching movies, taking photos, etc. To achieve these, many kinds of advanced sensor are used. In this paper, several applications of sensor in smart phone are introduced including Image Sensor, Fingerprint Identification Sensor, Photo-electric Sensor, Acceleration Sensor, etc. The trend of the mobile phone, 3I (Intellignet, Interaction and Internet), will have all kinds of sensor more and more popular in mobile phones to change our life.