Invention Grant
- Patent Title: Method and apparatus of private display device
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Application No.: US15404587Application Date: 2017-01-12
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Publication No.: US10045010B2Publication Date: 2018-08-07
- Inventor: Feng Cao , Jianbin Tang , Yini Wang , Ziyuan Wang
- Applicant: International Business Machines Corporation
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Scully, Scott, Murphy & Presser, PC
- Agent Keivan Razavi, Esq.
- Main IPC: G02F1/07
- IPC: G02F1/07 ; H04N13/04 ; G02B27/28 ; G02F1/09

Abstract:
There is provided a system and method for providing privacy viewing of an output from a electronic display, including a first polarizer configured to polarize a display signal at a first polarization angle; a second polarizer configured to polarize a noise signal at a second polarization angle orthogonal to the first polarization angle; a combiner configured to combine the polarized display signal and the polarized noise signal, and a third polarizer configured to receive the output of the electronic display and polarize the combined polarized display and noise signal at the first polarization angle. The system includes first and second polarization rotators configured to rotate the first and second polarization angles of the combined polarized display and noise signals prior to being output by the electronic display and prior to being received by the third polarizer.
Public/Granted literature
- US20170134719A1 METHOD AND APPARATUS OF PRIVATE DISPLAY DEVICE Public/Granted day:2017-05-11
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