PATENT CLAIM ANALYSIS

Application Number: 15874568
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-07
Patent Classification: ["399", "004000"]

Abstract:
An image forming apparatus includes: an image carrier on which an image is formed; a light source that generates a light beam; an optical scanner that executes scanning of the light beam; a reflection surface identifier that identifies each reflection surface of a rotary polygon mirror; a sub-scanning direction driver that relatively moves the image carrier and the light beam to each other; a storage that stores first jitter information; a photodetector that detects scanning of the light beam; a measurement device that generates second jitter information; and a hardware processor that uses the first and second jitter information to change a frequency of a write clock and adjust a phase of the write clock, wherein the hardware processor obtains a correction characteristic for a dot position shift, and changes the frequency of the write clock and adjusts the phase of the write clock.

Claim (Index 7):
A non-transitory recording medium storing a computer readable image forming control program that controls an image forming apparatus, wherein\n the image forming apparatus comprises: an image carrier exposed by a light beam to form an image on the image carrier; a light source that generates the light beam emitted in accordance with image data in synchronization with a write clock; an optical scanner that executes scanning of the light beam in a main scanning direction on the image carrier by a plurality of reflection surfaces of a rotary polygon mirror rotationally driven by a rotary drive source;\n a reflection surface identifier that identifies each of the reflection surfaces of the rotary polygon mirror; \n a sub-scanning direction driver that relatively moves the image carrier and the light beam to each other in a sub-scanning direction orthogonal to the main scanning direction; a storage that stores first jitter information of the light beam measured at a plurality of positions in the main scanning direction on each of the reflection surfaces of the rotary polygon mirror; a photodetector that detects scanning of the light beam at a start position and an end position in the main scanning direction; a measurement device that generates second jitter information according to a scanning time from the start position to the end position in the main scanning direction of each of the reflection surfaces of the rotary polygon mirror in accordance with a detection result of the photodetector; and a hardware processor that uses the first jitter information and the second jitter information to change a frequency of the write clock and adjust a phase of the write clock, the image forming control program causes a computer of the image forming apparatus to: correct the first jitter information in accordance with a difference between the first jitter information and the second jitter information at an end of a corresponding reflection surface among the reflection surfaces to obtain a correction characteristic for a dot position shift for each of the reflection surfaces of the rotary polygon mirror; and change the frequency of the write clock and adjust the phase of the write clock, in accordance with the correction characteristic.

Metadata:
- Claim Count in Document: 9.0
- Percentile: 86.0
- Lexical Diversity: 2.16667
- Patent Class: 399.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['10197892', '12275787', '15466582', '11822820', '15000854']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8029632864557512
- 35 USC 102 Novelty (BERT): 0.490114564858956
- Combined Prediction Score: 0.7716784142960716
- Mean Citation Score: 232.97013
- Max Citation Score: 252.02989
- Similarity Product: 202.25443979310631

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test