Invention Grant
- Patent Title: PI cell drive waveform
-
Application No.: US16712011Application Date: 2019-12-12
-
Publication No.: US11435602B2Publication Date: 2022-09-06
- Inventor: Hsienhui Cheng , Jianhong Huang
- Applicant: zSpace, Inc.
- Applicant Address: US CA Sunnyvale
- Assignee: zSpace, Inc.
- Current Assignee: zSpace, Inc.
- Current Assignee Address: US CA Sunnyvale
- Agency: Kowert, Hood, Munyon, Rankin & Goetzel, P.C.
- Main IPC: G02F1/01
- IPC: G02F1/01 ; H05B47/10 ; G02B30/25

Abstract:
Systems and methods for providing an electrical waveform to a pi-cell polarization switch. The electrical waveform may reduce/limit ion accumulation in and/or light leakage associated with the polarization switch. The electrical waveform may include multiple segments, e.g., a first segment may drive the polarization switch to a first polarization state and may be defined by a first portion having a first voltage level and a first polarity and a second portion having the first voltage level and a second polarity opposite the first polarity and a second segment, occurring after the first segment, that may drive the polarization switch to the second polarization state. The second segment may be defined by a second voltage level having the first polarity. An absolute value of the first voltage level may be greater than an absolute value of the second voltage level.
Public/Granted literature
- US20210181540A1 PI CELL DRIVE WAVEFORM Public/Granted day:2021-06-17
Information query