Patent ID: 9210754
Filing Date: 2015-12-08
Classification: H05B,Y02B

Abstract:
1. A light device, comprising: a plurality of first light cells, arranged in axisymmetric around an axis; a plurality of second light cells, arranged in axisymmetric around the axis; and a controller, determining whether to activate the first light cells and second light cells according to a brightness adjust value; a power supply, providing a driving voltage; a first switch, connected between the first light cells and the power supply; a second switch, connected between the second light cells and the power supply, wherein the controller transmits a first activate signal to the first switch and a second activate signal to the second switch, the first switch and the second switch are driving signal latch units, and the first activate signal and the second activate signal are impulse signals; wherein an average distance between the first light cells and the axis is shorter than an average distance between the second light cells and the axis, and wherein when the brightness adjust value is larger than a predetermined value, the controller activates the first light cells and second light cells, and when the brightness adjust value is smaller than the predetermined value, the controller activates the first light cells but does not activate the second light cells.