Patent ID: 8605057
Filing Date: 2013-12-10
Classification: G06F

Abstract:
1. A reflection detection apparatus, comprising: a light-emitting surface; a detection light output portion operable to obliquely emit a detection light towards an external object from an emission area, wherein the emission area is a part of the light-emitting surface; a plurality of light-receiving devices operable to selectively receive a reflected detection light, wherein the reflected detection light enters the light-emitting surface with a predetermined angle after being reflected by the external object; and a height detection portion operable to obtain a height of a portion on the external object, at which the detection light is reflected, using positional information of a light-receiving device from the plurality of light-receiving devices which has received the reflected detection light and positional information of the emission area, wherein the height is a distance to the portion from the light-emitting surface.