Title:
位相変調装置、及び位相変調方法
Document Type and Number:
Japanese Patent JP7208513
Kind Code:
B2
Abstract:
To provide a phase modulator and a phase modulation method that are capable of increasing a modulation amount of a phase without increasing voltage applied from a column data line to a pixel circuit.SOLUTION: A phase modulator that causes incident light to be reflected at a desired angle comprises: a plurality of pixel circuits 21 that are provided at positions where a plurality of column data lines and a plurality of row scan lines, orthogonal to each other, are each crossed; a liquid crystal 42 in which refraction indexes to incident light are changed by drive voltages applied by the pixel circuits 21; and a control circuit 22 for controlling the drive of the pixel circuits 21. The pixel circuit has: a SPAM 32 for holding a digital signal when the digital signal having a predetermined pulse width or a pulse number is applied; and a charge pump 31 for amplifying a pulse pattern output from the SPAM 32. In a case where a drive voltage of the liquid crystal 42 is a maximum voltage VLC or less, the digital signal is output to the liquid crystal 42 without amplification. In a case where the drive voltage exceeds the maximum voltage VLC, the digital signal is amplified by the charge pump 31 and is output to the liquid crystal 42.SELECTED DRAWING: Figure 3
Inventors:
Takashi Nagoya
Shunsuke Izawa
Kenzo Oe
Shunsuke Izawa
Kenzo Oe
Application Number:
JP2019057239A
Publication Date:
January 19, 2023
Filing Date:
March 25, 2019
Export Citation:
Assignee:
Jvc kenwood corporation
International Classes:
G02F1/133; G02F1/13; G02F1/29
Domestic Patent References:
| JP2018045187A | ||||
| JP2016512343A | ||||
| JP2012053322A |
Foreign References:
| US20160360301 | ||||
| US20080055222 | ||||
| CN102930841A |
Attorney, Agent or Firm:
Hidekazu Miyoshi
Shunichi Takahashi
Shunichi Takahashi
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