OPTICAL TOUCH SCREEN

• Main Authors: LIU, YUNCHENG, LIN, CHIENHUNG
• Format: Patent
• Language: Chinese; English
• Published: 21.05.2016
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The present invention provides an optical touch screen including a transparent panel, a camera module and at least one retro-reflector. The transparent panel includes a bottom surface and a touch surface opposite to each other, a corner and sides. The camera module disposed on the corner includes a light source, a light guide component, an optical clear adhesive and an optical sensor. The light source is used for emitting an incident light, in which a vertical distance between the light source and the touch surface is greater than a vertical distance between the bottom surface and the touch surface. The optical clear adhesive is used to fix the light guide component on the transparent panel, and the incident light enters the transparent panel through the light guide component and the optical clear adhesive with total reflection between the bottom surface and the touch surface.