Invention Grant
- Patent Title: Laser projection display device
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Application No.: US15432005Application Date: 2017-02-14
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Publication No.: US10349018B2Publication Date: 2019-07-09
- Inventor: Michio Hatagi , Akio Yabe
- Applicant: Hitachi-LG Data Storage, Inc.
- Applicant Address: JP Tokyo
- Assignee: Hitachi-LG Data Storage, Inc.
- Current Assignee: Hitachi-LG Data Storage, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Mattingly & Malur, PC
- Priority: JP2016-061953 20160325
- Main IPC: H04N9/31
- IPC: H04N9/31 ; G02B26/10 ; G02B27/01 ; G02F1/137 ; G09G3/34 ; G09G3/36 ; H01S5/00 ; H01S5/0683 ; H01S5/40 ; G02B26/02 ; G09G3/02 ; G02B26/08

Abstract:
A laser projection display device (1) includes a laser source (5), a laser driver (4) that drives the laser source, a scanning unit (7) that scans and projects laser light generated by the laser source, a liquid crystal element (14) that transmits the laser light at a predetermined transmittance, and a liquid crystal driver (17) that changes the transmittance by applying a voltage to the liquid crystal element. When a light quantity of the laser light generated by the laser source corresponds to a case in which the laser source operates in a nonlinear area, the laser driver shifts an operation point to an area other than the nonlinear area by increasing a driving level of the laser source by a predetermined amount G, and the liquid crystal driver decreases the transmittance of the liquid crystal element by a predetermined amount 1/G.
Public/Granted literature
- US20170280115A1 LASER PROJECTION DISPLAY DEVICE Public/Granted day:2017-09-28
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