Switchable light-collimating layer with bistable electrophoretic fluid
DE602019065199T2Active Publication Date: 2025-01-22E INK CORP
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Patent Information
- Application Number
- DE602019065199
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2018-08-10
- Filing Date
- 2019-07-29
- Publication Date
- 2025-01-22
- Estimated Expiration
- 2039-07-29
AI Technical Summary
Technical Problem
Existing switchable privacy filters require constant energy to maintain the privacy state, leading to increased power consumption and reduced battery life in portable devices.
Method used
A switchable light-collimating film using bistable electrophoretic fluids partitioned into elongated chambers, which requires energy only for state changes and maintains stability for long periods without additional power.
Benefits of technology
The film achieves a 2x narrowing of the viewing angle, is stable in both wide and narrow states, and allows for easy cutting to desired shapes without significant fluid loss, reducing manufacturing costs.
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