Patent ID: 9256077
Filing Date: 2016-02-09
CPC Classification: G02B,G02C,G02F,H04N

Claim Text:
1. An optical device comprising: optical components configured to be electrically actuated such that light transmission states are variable; a driver circuit for the optical components; a power source unit for driving the optical components; rims for supporting the optical components; temples having front and rear ends, and connected at the front ends to the rims; and earpieces formed at the rear ends of the temples, the power source unit including: a secondary battery having a cylindrical shape with a diameter of 2 mm to 6 mm and having a capacity of 10 to 100 mAh; and a charge/discharge circuit for controlling charge and discharge of the secondary battery, wherein: the secondary battery is provided near the rear end of the temple or in the earpiece, a hollow portion is provided near the rear end of the temple or in the earpiece, and has the secondary battery accommodated therein, a center of the gravity of the entire optical device exists between the front end of the temple and a front end of the secondary battery, when viewed from the side, and a distance between the front end of the temple and the center of gravity of the entire optical device, when viewed form the side, along a direction in which the temple extends is 15% to 50% of a distance between the front end of the temple and the rear end of the earpiece along the direction in which the temple extends.