IMAGE FORMING APPARATUS AND CONTROL METHOD OF IMAGE FORMING APPARATUS
First Claim
1. An image forming apparatus, comprising:
- a plurality of process units includinga photosensitive drum,an electric charger which charges the photosensitive drum,an exposing device which includes a plurality of light emitting element rows in a sub-scanning direction in which a plurality of light emitting elements are arranged in a main scanning direction, and configured to irradiate the photosensitive drum to form a latent image while switching the light emitting element rows, anda developing device which attaches toner to the latent image of the photosensitive drum to form a toner image;
a transferring member configured to receive the toner image from the photosensitive drum of each process unit, and transfer the toner image to a print medium;
a sensor configured to detect the toner image transferred from the photosensitive drum of each process unit to the transferring member; and
a processor configured to calculate a skew deviation amount of the process unit based on a detection result of the sensor, and control turning on and off one or more light emitting elements of the light emitting element rows of the exposing device based on a central tendency of the calculated skew deviation amount and the skew deviation amount of the process unit, whereinthe skew deviation amount is a difference between a slope of one line of the toner image formed on the transferring member by any one of the process units and a slope of one line of the toner image formed by another one of the process units.
1 Assignment
0 Petitions
Accused Products
Abstract
According to one embodiment, an image forming apparatus includes a plurality of process units, a transferring member, a sensor, and a processor. The plurality of process units include a photosensitive drum, an electric charger which charges the photosensitive drum, an exposing device which includes a plurality of light emitting element rows in a sub-scanning direction configured by the plurality of light emitting elements, and irradiates the photosensitive drum to form a latent image, and a developing device which attaches toner to the latent image to form a toner image. The transferring member receives the toner image from the photosensitive drum. The sensor detects the toner image transferred to the transferring member. The processor calculates a skew deviation amount based on the detection result of the sensor, and controls turning on and off the light emitting element based on a central tendency and the skew deviation amount.
-
Citations
18 Claims
-
1. An image forming apparatus, comprising:
-
a plurality of process units including a photosensitive drum, an electric charger which charges the photosensitive drum, an exposing device which includes a plurality of light emitting element rows in a sub-scanning direction in which a plurality of light emitting elements are arranged in a main scanning direction, and configured to irradiate the photosensitive drum to form a latent image while switching the light emitting element rows, and a developing device which attaches toner to the latent image of the photosensitive drum to form a toner image; a transferring member configured to receive the toner image from the photosensitive drum of each process unit, and transfer the toner image to a print medium; a sensor configured to detect the toner image transferred from the photosensitive drum of each process unit to the transferring member; and a processor configured to calculate a skew deviation amount of the process unit based on a detection result of the sensor, and control turning on and off one or more light emitting elements of the light emitting element rows of the exposing device based on a central tendency of the calculated skew deviation amount and the skew deviation amount of the process unit, wherein the skew deviation amount is a difference between a slope of one line of the toner image formed on the transferring member by any one of the process units and a slope of one line of the toner image formed by another one of the process units. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
-
-
2. (canceled)
-
10. A control method of an image forming apparatus, wherein
the image forming apparatus includes a plurality of process units including a photosensitive drum, an electric charger which charges the photosensitive drum, an exposing device which includes a plurality of light emitting element rows in a sub-scanning direction in which a plurality of light emitting elements are arranged in a main scanning direction, and irradiates the photosensitive drum to form a latent image while switching the light emitting element rows, and a developing device which attaches toner to the latent image of the photosensitive drum to form a toner image, receiving the toner image from the photosensitive drum of each process unit, and transferring the toner image to a print medium; -
detecting the toner image transferred from the photosensitive drum of each process unit to the transferring member; and calculating a skew deviation amount of the process unit based on a detection result, and controlling turning on and off one or more light emitting elements of the exposing device based on a central tendency of the calculated skew deviation amount and the skew deviation amount of the process unit, wherein the skew deviation amount is a difference between a slope of one line of toner image formed on the transferring member by any one of the process units and a slope of one line of the toner image formed by another one of the process units. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
-
-
11. (canceled)
Specification