Sewing Machine Pattern Projection with Contrast Borders
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Solution Overview
Problem
Existing sewing machines struggle to project clear pattern images on work cloths with varying color tones and materials, making it difficult for users to align sewing positions accurately.
Innovation Solution
A sewing machine equipped with a projector that generates and projects a pattern image including a pattern object and a peripheral object surrounding it, using pattern data stored in a storage portion and controlled by a processor, to ensure visibility on the work cloth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a display light source is used to project pattern images on work cloth, then position alignment is improved, but visibility deteriorates when work cloth has specific color tones or materials
Solution Approach 1:
The patent applies color changes by introducing a peripheral object with a color that contrasts with both the pattern object and the work cloth. This peripheral object surrounds the pattern object and is configured to have a color different from the work cloth, thereby enhancing the visibility of the pattern image regardless of the work cloth's color tone or material properties.
2Device complexity
If pattern image is projected directly without additional elements, then device complexity is reduced, but visibility on work cloth deteriorates
Solution Approach 1:
The patent segments the projected image into distinct components: a pattern object representing the sewing pattern and a peripheral object surrounding it. This segmentation allows each element to serve its specific function - the pattern object provides sewing guidance while the peripheral object enhances visibility through color contrast with the work cloth.
Solution Approach 2:
The peripheral object acts as an intermediary element between the pattern object and the work cloth. It mediates the visibility issue by providing a contrasting color border that makes the pattern image stand out against various work cloth materials and color tones, without interfering with the actual sewing pattern projection.
Data Source
AI summary
A sewing machine sews a sewing pattern on a work cloth. The sewing machine includes a storage portion configured to store pattern data used for sewing the sewing pattern on the work cloth, and a projector configured to project an image. The sewing machine generates, on the basis of the pattern data, a projection image that includes a pattern object and a peripheral object. The pattern object represents the sewing pattern. The peripheral object is disposed adjacent to an outer edge of the pattern object and surrounds the pattern object. The sewing machine controls the projector and projecting the generated projection image toward a top surface of a bed portion on which the work cloth is placed.