Light-emitting Device Zigzag Element Arrangement
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Solution Overview
Problem
Increasing the number of rows of light-emitting elements in a light-emitting device to achieve high-definition image formation leads to an increase in the dimension of the element forming region, resulting in deteriorated image formation performance and larger device size.
Innovation Solution
Arranging four or more rows of light-emitting element groups with specific configurations, where each group's elements are positioned at different intervals in the first direction, allowing for shorter distances between elements in the second direction, thereby reducing the dimension of the element forming region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of rows of element groups is increased to achieve high-definition image formation, then image formation performance is improved, but the dimension of the element forming region in the sub-scanning direction increases, resulting in deteriorated image formation performance or increased device size
Solution Approach 1:
The patent applies dimensional change by arranging element groups in a zigzag pattern rather than a simple linear sequence. Specifically, element groups are arranged in two rows where the first row elements are positioned at odd positions (1st, 3rd, 5th...) and the second row elements are positioned at even positions (2nd, 4th, 6th...) in the main scanning direction. This interleaved arrangement allows multiple rows to be packed into a narrower sub-scanning direction range, reducing the overall dimension while maintaining high-definition image formation capability through increased row density.
2Measurement precision
If the number of rows of element groups is increased to achieve high-definition image formation, then image formation performance is improved, but the size of the light-emitting device increases
Solution Approach 1:
The patent reduces the device area by transitioning from a conventional linear arrangement to a two-dimensional zigzag arrangement. Element groups are distributed across two rows with alternating positions in the main scanning direction, effectively utilizing both dimensions to pack more element groups into a compact footprint. This maintains high-definition image formation performance while minimizing the overall device size.
Solution Approach 2:
The patent segments the element groups into two distinct rows with specific positioning patterns. The first row contains element groups at odd positions while the second row contains element groups at even positions, creating an interleaved structure. This segmentation allows for optimized spatial distribution that reduces the overall device area while preserving the necessary resolution for high-definition image formation.
Data Source
AI summary
A light-emitting device includes four or more rows of element groups each having light-emitting elements arranged in a first direction, the element groups being arranged in parallel in a second direction different from the first direction. In each of a plurality of unit regions arranged in the first direction, the light-emitting elements belonging to the four or more rows of element groups are arranged at different positions by ones. The four or more rows of element groups includes a first element group, a second element group, and a third element group adjacent to the second element group. In each of the plurality of unit regions, the light-emitting element belonging to the second element group is disposed on one side in the first direction when viewed from the light-emitting element belonging to the first element group, and the light-emitting element belonging to the third element group is disposed on the other side in the first direction when viewed from the light-emitting element belonging to the first element group.