Patent ID: 11947201
Assignee: SEIKO EPSON CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 6:
7. A control method of a liquid crystal device, the liquid crystal device including:
a liquid crystal panel including a first liquid crystal layer,
a first polarizing element provided on a light incidence side of the liquid crystal panel,
a second polarizing element provided on a light emission side of the liquid crystal panel,
a first phase difference adjusting element arranged between the first polarizing element and the liquid crystal panel and including a second liquid crystal layer,
a second phase difference adjusting element arranged between the liquid crystal panel and the second polarizing element and including a third liquid crystal layer, and
a control unit configured to control a value of a voltage applied to the second liquid crystal layer and the third liquid crystal layer, based on image data input to the liquid crystal panel, wherein
the liquid crystal device controls the voltage applied to the second liquid crystal layer and the third liquid crystal layer, based on brightness information or contrast information of an image displayed by the liquid crystal panel, and
the control unit has a first mode and a second mode, the first mode being a mode in which the control unit controls the voltage applied to the second liquid crystal layer and the third liquid crystal layer so that the first phase difference adjusting element emits linearly polarized light and the second phase difference adjusting element emits linearly polarized light, and the second mode being a mode in which the control unit controls the voltage applied to the second liquid crystal layer and the third liquid crystal layer so that the first phase difference adjusting element emits elliptically polarized light or circularly polarized light and the second phase difference adjusting element emits linearly polarized light.