Print Head Rib Layout to Prevent LED Panel Deformation
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Solution Overview
Problem
The use of a film-like light-emitting element panel in a print head results in deformation due to displacement spots caused by ribs on the fixing member, leading to misalignment of light-emitting elements and defective beam diameters on the image carrier surface.
Innovation Solution
The print head design includes a fixing member made of resin material with ribs on the opposite side to the light-emitting element panel, arranged such that light-emitting points do not overlap rib regions or their intersections, ensuring proper alignment and preventing deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rib is provided on the fixing member to ensure strength, then the fixing member strength is improved, but displacement spots are generated causing light-emitting element panel deformation
Solution Approach 1:
The harmful effect of the rib (displacement spot generation) is extracted and separated from the functional requirement (strength). The rib is repositioned to the rear surface where it provides strength without affecting the front surface flatness, thus extracting the harmful effect while preserving the beneficial strength enhancement.
Solution Approach 2:
The rib structure is moved from the front surface (light-emitting element panel side) to the rear surface (opposite side) of the fixing member. This dimensional relocation allows the rib to fulfill its structural support function while eliminating its harmful effect on the light-emitting element panel flatness.
2Adaptability or versatility
If the light-emitting element panel is made thin for flexibility, then the panel flexibility is improved, but the panel becomes susceptible to deformation from displacement spots
Solution Approach 1:
The thinness of the light-emitting element panel, which initially causes susceptibility to deformation, is converted into a benefit by relocating the rib to the rear surface. The rib's displacement spot effect is transformed from harmful (causing deformation) to beneficial (providing structural support without affecting the thin panel's flatness).
3Device complexity
If the light-emitting points overlap with rib regions, then the device complexity is reduced, but the positional relationship between lens array and light-emitting elements becomes misaligned
Solution Approach 1:
The fixing member surface is segmented into functional zones: the front surface maintains flatness for precise optical alignment, while the rear surface contains the rib structure for mechanical support. This segmentation allows independent optimization of both alignment precision and structural strength.
Solution Approach 2:
The rib structure is relocated to the rear surface dimension, separating it from the front surface optical path. This dimensional separation allows light-emitting points to be positioned without overlap concerns, as the rib exists in a different spatial dimension (rear surface) that does not interfere with optical alignment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design effectively prevents defective beam diameters on the image carrier surface by maintaining the positional relationship between the lens array and light-emitting elements, enhancing image quality.
Implementation Method 1
a lens array that collects light emitted from the plurality of light-emitting elements onto an image carrier
Data Source
AI summary
A print head includes a light-emitting element panel, a lens array, and a fixing member. A rib is provided on a surface (rear surface) of the fixing member constituted by a resin material. A plurality of light-emitting elements are provided on the light-emitting element panel such that none of light-emitting points overlaps rib regions, or at least two ribs are provided so as to intersect each other on the surface (rear surface) of the fixing member. The plurality of light-emitting elements are provided on the light-emitting element panel such that none of the light-emitting points overlaps an intersection region.