Patent ID: 8238002
Filing Date: 2012-08-07
Classification: H04N

Abstract:
1. An image reading apparatus which is driven upon reception of power supply from an external apparatus to read an image on an original, comprising: reading means for optically reading the image on the original by electrically scanning a sensor in a first direction and mechanically scanning the sensor in a second direction perpendicular to the first direction, while intermittently emitting light of a light source of the reading means to the original during a reading cycle, wherein all of a red LED, a green LED, and a blue LED are included in the light source of the reading means; display means for displaying an operating status of the image reading apparatus on a screen by turning on a light source of the display means at a timing when the light of the light source of the reading means is not emitted during the reading cycle and by turning off the light source of the display means at a timing before the light of the light source of the reading means is emitted during the reading cycle; ON control means for controlling an ON period of the light source of said reading means and an ON period of the light source of said display means such that the light source of said reading means and the light source of said display means are alternately turned on and the ON period of the light source of said reading means and the ON period of the light source of said display means do not overlap each other during the reading cycle, wherein said ON control means controls to turn on the light source of said display means at an interval between an ON period of the red LED and an ON period of the green LED, at an interval between the ON period of the green LED and an ON period of the blue LED, and after an end of the ON period of the blue LED, during every line reading cycle of image reading; and reading control means for controlling to sequentially turn on the red LED, the green LED, and the blue LED such that the ON periods of the red LED, the green LED, and the blue LED do not overlap each other during every line reading cycle of image reading.