Exposure Head Light Intensity Correction at LED Array Chip Boundaries

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing image forming apparatuses face inaccuracies in light intensity correction, particularly at the boundaries between light-emitting element array chips, leading to insufficient correction accuracy.

Innovation Solution

An information processing apparatus generates correction data to address light intensity differences at chip boundaries and overall distribution, using a first correction unit for boundary adjustments and a second correction unit for overall intensity distribution, enhancing the accuracy of light intensity correction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If light intensity correction is performed using existing techniques, then correction is applied to the exposure head, but the accuracy of correction is insufficient due to sharp differences at boundaries between light-emitting element array chips

Engineering Contradiction:

Improvelight intensity correction accuracyVSAvoidimage quality consistency

Core Design Contradiction:

Measurement precisionVSManufacturing precision

Solution Approach 1:

The correction process is divided into two distinct segments: first correction data generation for boundary regions between adjacent light-emitting element array chips, and second correction data generation for the overall light intensity distribution. This segmentation allows each correction stage to address specific issues independently, improving overall correction accuracy.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first correction data is generated and applied before generating the second correction data. By preliminarily correcting the boundary differences, the foundation for subsequent overall distribution correction is improved, enabling more accurate final correction results.

Inventive Principle:

Principle #10Preliminary action

2Device complexity

If a single correction process is used for the entire exposure head, then the process is simple, but the correction accuracy at chip boundaries is insufficient

Engineering Contradiction:

Improvecorrection process complexityVSAvoidlight intensity correction accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different correction strategies are applied to different regions: the first correction data specifically addresses boundary regions between chips, while the second correction data addresses the overall light intensity distribution. This local quality approach ensures that each region receives appropriate correction tailored to its specific characteristics.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20250370372A1Information processing apparatus, image forming apparatus, control method, and non-transitory computer-readable storage medium

Publication Date: 2025.12.04 CANON KK

AI summary

An information processing apparatus that generates correction data for correcting light intensity of an image forming apparatus that includes an exposure head that includes a plurality of light-emitting element array chips that each include a plurality of light-emitting elements, the information processing apparatus comprises a first correction unit configured to generate first correction data for correcting light intensity differences at boundaries between adjacent light-emitting element array chips; and a second correction unit configured to generate second correction data for correcting light intensity distribution of the exposure head corrected using the first correction data.