Image forming apparatus
AssigneeKYOCERA Document Solutions Inc.
InventorYasuyoshi KOBAYASHI
Life of this patent
Estimating the term…
Abstract
An image forming apparatus, with a document cover open and in addition with no document placed on a contact glass, without performing printing operation, performs first test reading where the contact glass is read without a light source being turned on; thereafter, performs the printing operation, and performs second test reading where the contact glass is read without the light source being turned on. The image forming apparatus checks a flicker level based on a first comparison value calculated based on image data acquired in the first test reading and a second comparison value calculated based on image data acquired in the second test reading.
Claims6
An image forming apparatus comprising:
- an image reading portion including a light source which radiates light toward a contact glass, the image reading portion reading the contact glass to generate image data;
- a document cover supported to be openable and closable with respect to the contact glass;
- a printing portion which conveys a sheet fed into a sheet conveyance passage, the printing portion printing an image on the sheet while conveying the sheet;
- and
- a control portion which controls the image reading portion and the printing portion, wherein
- the control portion,
- with the document cover open and in addition with no document placed on the contact glass, without making the printing portion perform printing operation, makes the image reading portion perform first test reading in which the contact glass is read without the light source being turned on, and
- after completion of the first test reading, makes the printing portion perform the printing operation, and makes the image reading portion perform second test reading in which the contact glass is read without the light source being turned on, and
- the control portion,
- based on first image data acquired in the first test reading, calculates a first comparison value representing brightness of illumination light from a lighting device installed at a place where the image forming apparatus is installed,
- based on second image data acquired in the second test reading, calculates a second comparison value representing the brightness of the illumination light from the lighting device, and
- based on the first and second comparison values, checks whether or not a flicker level indicating intensity of a flicker of the illumination light from the lighting device exceeds a permissible level.
Dependencies are inferred from the claim text.