Transmittance Measurement of Smartphone Proximity Sensor Window

Introduction

Currently, smartphone sales have increased to become a large portion of mobile phone sales. Major features of smartphones include a large screen and touch-panel operation. However, when it is actually used as a telephone, a proximity sensor automatically detects that the ear has moved closer to the phone. This triggers the suspension of operation of the touch panel and illumination of the backlight, thereby preventing malfunctions and draining of the battery. The transmittance of the sensor window is a factor that greatly affects the functioning of this proximity sensor. Here, we introduce the results of measurement of a smartphone proximity sensor window using the UV- 1800 ultraviolet-visible spectrophotometer together with a dedicated smartphone sample holder.

March 25, 2013 GMT