Patent ID: 8023778
Filing Date: 2011-09-20
Classification: G02B,G06F

Abstract:
1. An optical touch panel comprising: a coordinate input region; a light-emitting element; a light-receiving element; a light-emitting sided-optical waveguide connected to the light-emitting element and having an output end; and a light-receiving sided-optical waveguide connected to the light-receiving element and having an input end, wherein the output end of the light-emitting sided-optical waveguide and the input end of the light-receiving sided-optical waveguide are located on opposite sides of the coordinate input region, wherein the light-emitting sided-optical waveguide comprises a light-emitting sided-cladding layer, and a light-emitting sided-core embedded in the light-emitting sided-cladding layer, and the light-receiving sided-optical waveguide comprises a light-receiving sided-cladding layer, and a light-receiving sided core embedded in the light-receiving sided-cladding layer, and the light-emitting sided-cladding layer has a lower refractive index than the light-emitting sided-core and the light-receiving sided-cladding layer has a lower refractive index than the light-receiving sided-core, and the center height of the light-emitting sided-core is lower than that of the light-emitting sided-optical waveguide and the center height of the light-receiving sided-core is lower than that of the light-receiving sided-optical waveguide, and the optical touch panel further comprising means for generating a signal to provide input operational feeling using a detection signal received from the light-receiving element as a result of coordinate inputting.