Patent ID: 9468058
Filing Date: 2016-10-11
CPC Classification: H01L,H05B

Claim Text:
1. A light emitting device comprising: a light source including a first LED array including a plurality of first LEDs connected in series and a second LED array including a plurality of second LEDs connected in series; a connection controller to selectively set a connection structure between the first and second LED arrays as a series connection, a parallel connection, and a series-parallel connection based on a peak value of a driving voltage driving the light source unit; and a driving controller to control a number of LEDs that are driven by the driving voltage in the light source according to a magnitude of the driving voltage, wherein each of the first and second LED arrays is connected between a plurality of first nodes and a plurality of second nodes, wherein: the connection controller includes a connection switch to set the connection structure between the first and second LED arrays through a switching operation, and a connection switching controller to control a switching operation of the connection switch, and the connection switch includes a plurality of first connection switches each connected between the plurality of first nodes or between the plurality of second nodes, at least one second connection switch connected to at least one node between the plurality of first LEDs and at least one node between the plurality of second LEDs, and at least one third connection switch connected to at least one of the plurality of first nodes and at least one of the plurality of second nodes.