Patent ID: 8926052
Filing Date: 2015-01-06
Classification: B41J,G01F

Abstract:
1. A control method for an ink jet printing apparatus including an ink tank that stores ink, a light-emitting portion that emits light in a predetermined light-emitting quantity to a reflection portion of the ink tank, a light-receiving portion that receives reflected light from the reflection portion, and a determining portion that determines an absence of ink inside the ink tank if an amount of received light received by the light-receiving portion is equal to or greater than a predetermined amount, and determines a presence of ink inside the ink tank if an amount of received light received by the light-receiving portion is less than the predetermined amount, the control method comprising: moving the reflection portion of the ink tank into a position facing the light-emitting portion; emitting light in the predetermined light-emitting quantity toward the light-receiving portion from the light-emitting portion; increasing a light-emitting quantity until the amount of light received by the light-receiving portion is greater than the predetermined amount; decreasing a light-emitting quantity until the amount of light received by the light-receiving portion becomes equal to the predetermined amount; changing the predetermined light-emitting quantity to be the light-emitting quantity which caused the amount of light received by the light-receiving portion to be equal to the predetermined amount; and storing the light-emitting quantity that has changed in a storage unit that is provided on the ink tank.