Patent ID: 8582159
Filing Date: 2013-11-12
Classification: G03G,H04N

Abstract:
1. A control device for controlling a light source element configured to irradiate light for reading an image on a document comprising: a drive portion configured to selectively apply a first drive voltage and a second drive voltage lower than the first drive voltage to the light source element; a detector configured to detect a light quantity of reflected light of the light irradiated to the image; and a control portion configured to control the drive portion and switch between applications of the first drive voltage and the second drive voltage, wherein the control portion controls the drive portion based on a threshold period set in relation to an elapsed period from an application time of the first drive voltage and a threshold light quantity set in relation to the light quantity of the reflected light, and wherein, if the light quantity of the reflected light falls below the threshold light quantity when the elapsed period from the application time of the first drive voltage goes over the threshold period, the control portion applies the second drive voltage to the drive portion.