Bistable Display Alignment via Protrusion and Through Hole Interlock
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Solution Overview
Problem
Existing electronic signage systems for retail are costly due to the need for multiple signs with integrated electronics and power sources, and alignment issues with separate writers complicate the rewriting process, especially with varying manufacturing tolerances.
Innovation Solution
A system comprising a flexible bistable display media with precision through holes for accurate alignment and a writing device with protrusions and electrical conductors that align with the media's contacts, allowing for inexpensive, quick, and frequent rewriting without powering the displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a separate writer is used from the display, then cost is reduced by eliminating integrated electronics and power sources in each sign, but alignment difficulty increases due to manufacturing tolerances and varying tolerances between displays
Solution Approach 1:
The patent introduces alignment features (mechanical or optical) as intermediaries between the display and writer. These features serve as reference points that mediate the alignment process, allowing the writer to accurately locate and write to electrical contacts on the display without requiring complex positioning systems or integrated electronics in each sign.
2Measurement precision
If finer resolutions are used for customer readability, then display quality improves, but alignment precision requirements increase making writing more difficult
Solution Approach 1:
The patent incorporates alignment features during the display manufacturing process itself, before the writing step. These pre-built features (such as alignment marks or mechanical references) establish precise reference points that guide the writer's positioning. This preliminary action ensures that even with fine resolutions and closely spaced electrical contacts, the writer can accurately locate targets without requiring extremely tight tolerances in the writing process.
Data Source
AI summary
A system and method for writing bistable media is described, wherein the media has at least one through hole that interacts with at least one protrusion on a writer to align the media with the writer.