Patent ID: 10145528

Abstract:
A light emitting module of an embodiment comprises: (1-1)th to (1-M)th (where M is a positive integer equal to or greater than 2) light emitting elements connected with each other; (2-1)th to (2-N)th (where N is a positive integer equal to or greater than 1) light emitting elements connected in parallel with a (1-m)th (1≤m≤M) light emitting elements which is one of the (1-1)th to (1-M)th light emitting elements; and an on/off controller controlling to turn the (1-1)th to (1-M)th light emitting elements and (2-1)th to (2-N)th light emitting elements on or off according to a level of an operation signal. The on/off controller comprises a first on/off control unit controlling to turn the (1-m)th light emitting element and (2-1)th to (2-N)th light emitting elements on or off, and a second on/off control unit controlling to turn the remaining light emitting elements on or off, excluding the (1-m)th light emitting element from the (1-1)th to (1-M)th light emitting elements, wherein the first on/off control unit compensates for a change in a second current flowing in the (2-1)th to (2-N)th light emitting elements, depending on the temperature, in conjunction with a first current flowing in the (1-m)th light emitting element.