Invention Grant
- Patent Title: Privacy films for electronic displays
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Application No.: US17046035Application Date: 2018-09-12
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Publication No.: US12032261B2Publication Date: 2024-07-09
- Inventor: Super Liao , Hsing-Hung Hsieh , Ann Alejandro Villegas
- Applicant: Hewlett-Packard Development Company, L.P.
- Applicant Address: US TX Spring
- Assignee: Hewlett-Packard Development Company, L.P .
- Current Assignee: Hewlett-Packard Development Company, L.P .
- Current Assignee Address: US TX Spring
- Agency: Shook, Hardy & Bacon L.L.P.
- Agent Elena McFarland
- International Application: PCT/US2018/050585 2018.09.12
- International Announcement: WO2020/055390A 2020.03.19
- Date entered country: 2020-10-08
- Main IPC: G02F1/167
- IPC: G02F1/167 ; G02F1/13357 ; G02F1/1677 ; G09G3/34

Abstract:
The present disclosure is drawn to privacy films for electronic displays. In one example, a privacy film for an electronic display can include a louver film. The louver film can include: a plurality of high refractive index slats with a refractive index of about 1.5 to about 3 and having a trapezoidal cross section narrowing toward a viewer side of the louver film; and a plurality of low refractive index slats between the high refractive index slats, having a refractive index less than the refractive index of the high refractive index slats by about 0.1 to about 2. An electrophoretic ink can be optically associated with the low refractive index slats, including opaque particles that are electrically mobile to cause modification of light transmission therethrough. A first and second transparent electrode film can be on a viewer side and a rear side of the electrophoretic ink, respectively.
Public/Granted literature
- US20210191223A1 PRIVACY FILMS FOR ELECTRONIC DISPLAYS Public/Granted day:2021-06-24
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