Patent ID: 9367140
Filing Date: 2016-06-14
CPC Classification: G06F

Claim Text:
1. A keyboard device, comprising a substantially rectangular operation surface, wherein one long side of the operation surface is referred to as a proximal side, which nears a user operating the keyboard device; and the other long side is referred to as a distal side; wherein the operation surface comprises: a key unit, positioned on the proximal side, comprising a plurality of keys; a camera module, positioned on center of the distal side, comprising: an active light emitter for emitting light of a preset wave length; and a light sensor for detecting light of the preset wave length; wherein an angle between a border of a field of view of the light sensor and the operation surface is set at a particular angle thus user's hand is kept out of the field of view of the light sensor when the user's hand is manipulating the key unit; the light sensor is positioned in a way by which when the user raises at least one finger and lays the rest part of the corresponding hand on the operation surface, only the raised finger enters the field of view of the light sensor; and a first angle indicates a range in which the active light emitter emits light, a second angle indicates a range in which the light sensor captures images, and the first angle is larger than the second angle.