Patent ID: 9057819
Filing Date: 2015-06-16
Classification: G01D,G02B

Abstract:
1. A light-emitting element driving apparatus comprising: a light-emitting element; a driving unit including a control terminal and configured to drive the light-emitting element in accordance with a potential of the control terminal; and a controlling unit including a voltage holding unit, wherein the controlling unit controls the potential of the control terminal such that an emitted light amount approaches a target value, and causes the voltage holding unit to hold a voltage corresponding to the potential of the control terminal, when the light-emitting element is in an emitting state, controls the potential of the control terminal to inactivate the driving unit, when setting the light-emitting element in a non-emitting state, and controls the potential of the control terminal by using the voltage held in the voltage holding unit, when setting the light-emitting element in the emitting state from the non-emitting state.