Staggered Light Emitting Component for High Resolution Optical Writing
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Solution Overview
Problem
Existing light emitting component arrangements in optical writing devices for image forming apparatuses face challenges in narrowing the arrangement interval of adjacent light emitting points while maintaining sufficient light emitting areas, which affects resolution and light intensity.
Innovation Solution
A light emitting component configuration with two rows of light emitting elements arranged in a staggered manner in the main scanning direction, where the second row is deviated in the sub scanning direction and positioned between adjacent elements of the first row, allowing for overlapping light emitting areas to enhance resolution and light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light emitting elements are arranged in a single row in the main scanning direction, then the structure is simple, but the arrangement interval between adjacent light emitting points cannot be sufficiently narrowed
Solution Approach 1:
The patent transitions from a single-row arrangement to a two-row staggered arrangement, utilizing the sub-scanning direction as an additional dimension. This allows light emitting elements to be positioned at intervals of 1/2 pitch in the main scanning direction while maintaining adequate spacing in the sub-scanning direction, effectively narrowing the arrangement interval without compromising structural simplicity
2Manufacturing precision
If the arrangement interval of light emitting points is narrowed, then the resolution is improved, but the light emitting area of each element is reduced
Solution Approach 1:
By arranging elements in two staggered rows with deviation in the sub-scanning direction, the patent allows each element to maintain its full light emitting area while achieving half the arrangement interval in the main scanning direction. The staggered configuration ensures that elements in one row are positioned between elements of the other row, optimizing both resolution and light emitting area
Solution Approach 2:
The patent combines two rows of light emitting elements into a unified array structure where the light emitting areas are overlapped in the main scanning direction. This merging approach allows the system to achieve high resolution through dense point arrangement while each individual element maintains sufficient area for adequate light emission
3Manufacturing precision
If light emitting elements are arranged in two staggered rows, then the arrangement interval is narrowed and resolution is improved, but the light distribution uniformity may be affected
Solution Approach 1:
The patent applies local quality by having light emitting elements in the two rows emit light with overlapping areas in the main scanning direction. This localized overlap strategy ensures that each region receives adequate light intensity while maintaining the staggered arrangement for high resolution, thus preserving light distribution uniformity
Data Source
AI summary
A light emitting component includes: a first light emitting element row including light emitting elements arranged in a main scanning direction; and a second light emitting element row including light emitting elements arranged in the main scanning direction such that the second light emitting element row is deviated from the first light emitting element row in a sub scanning direction and each of the light emitting elements in the second light emitting element row is positioned between light emitting elements adjacent to each other in the first light emitting element row, and a light emitting point area that is an area where each light emitting element of the first light emitting element row emits light, and a light emitting point area that is an area where each light emitting element of the second light emitting element row emits light are overlapped with each other in the main scanning direction.