IMAGE FORMING APPARATUS AND CONTROL METHOD THEREOF
First Claim
1. An image forming apparatus comprising:
- a light beam output unit configured to output a light beam;
a deflection unit for deflection scanning in a main scanning direction of a photosensitive member by reflecting the light beam from the light beam output unit;
a timing information detection unit configured to detect timing information of the deflection scanning by the deflection unit;
a calculation unit configured to calculate a correction amount of the main scanning direction for a next scan based on the timing information;
a light beam modulation control unit configured to generate a light beam modulation signal based on image data and the correction amount; and
a drive unit configured to drive the light beam output unit based on the light beam modulation signal.
1 Assignment
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Accused Products
Abstract
An image forming apparatus includes a light beam output unit configured to output a light beam, a deflection unit for deflection scanning in a main scanning direction of a photosensitive member by reflecting the light beam from the light beam output unit, a timing information detection unit configured to detect timing information of the deflection scanning by the deflection unit, a calculation unit configured to calculate a correction amount of the main scanning direction for a next scan based on the timing information, a light beam modulation control unit configured to generate a light beam modulation signal based on image data and the correction amount, and a drive unit configured to drive the light beam output unit based on the light beam modulation signal.
6 Citations
11 Claims
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1. An image forming apparatus comprising:
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a light beam output unit configured to output a light beam; a deflection unit for deflection scanning in a main scanning direction of a photosensitive member by reflecting the light beam from the light beam output unit; a timing information detection unit configured to detect timing information of the deflection scanning by the deflection unit; a calculation unit configured to calculate a correction amount of the main scanning direction for a next scan based on the timing information; a light beam modulation control unit configured to generate a light beam modulation signal based on image data and the correction amount; and a drive unit configured to drive the light beam output unit based on the light beam modulation signal. - View Dependent Claims (2, 3, 4, 5)
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6. A method for controlling an image forming apparatus which has:
- a light beam output unit configured to output a light beam for exposing a photosensitive member; and
a deflection unit for deflection scanning a photosensitive member in a main scanning direction by reflecting the light beam from the light beam output unit;
the method comprising;detecting timing information of the deflection scanning by the deflection unit; calculating a correction amount of the main scanning direction for a next scan based on the timing information; generating a light beam modulation signal based on image data and the correction amount; and driving the light beam output unit based on the light beam modulation signal. - View Dependent Claims (7, 8, 9, 10, 11)
- a light beam output unit configured to output a light beam for exposing a photosensitive member; and
Specification