公开(公告)号：US10692451B2

公开(公告)日：2020-06-23

申请号：US16356947

申请日：2019-03-18

Applicant: CASIO COMPUTER CO., LTD.

Inventor： Takahiro Ono ,  Fumiaki Ochiai

IPC: G09G3/36 ,  G04G9/04

Abstract: A liquid crystal controller is provided for a liquid crystal panel having a plurality of pixels, each of which includes a memory element and a display element. The memory element is configured to hold electric potential depending on an image signal and is configured to change the held electric potential based on activation of an enable signal. The display element is configured to be applied voltage depending on the electric potential which the memory element holds. The liquid crystal controller is configured to: hold off outputting the enable signal, for a period th before polarity of AC voltage applied to the display element is inverted and a period (tr+ts) after the polarity of the AC voltage is inverted; and hold off inversion of the polarity of the AC voltage, for an output period of the enable signal and the period th after the output period.

公开(公告)号：US11295686B2

公开(公告)日：2022-04-05

申请号：US17014730

申请日：2020-09-08

Applicant: CASIO COMPUTER CO., LTD.

Inventor： Takahiro Ono ,  Fumiaki Ochiai ,  Yoshinori Asami ,  Eiji Yamakawa

IPC: G09G3/36 ,  G04G9/12

Abstract: A liquid crystal control circuit includes: a first terminal that outputs a rewriting signal for rewriting a plurality of pixels; a second terminal that periodically designates a start timing of the rewriting signal; a third terminal that outputs a polarity signal for designating polarity of AC voltage; a first circuit that identifies a next second inversion timing of any first inversion timing at which the polarity is inverted; a calculator that calculates a first start timing after the first inversion timing based on the start timing; a second circuit that determines whether the second inversion timing is within a period from a predetermined time before the first start timing to the first start timing; and an inversion unit that inverts polarity of the polarity signal after the rewriting signal starting from the first start timing is stopped, when the second inversion timing is within the period.

公开(公告)号：US10783845B2

公开(公告)日：2020-09-22

申请号：US16357979

申请日：2019-03-19

Applicant: CASIO COMPUTER CO., LTD.

Inventor： Takahiro Ono ,  Fumiaki Ochiai ,  Yoshinori Asami ,  Eiji Yamakawa

IPC: G09G3/36 ,  G04G9/12

Abstract: A liquid crystal control circuit is provided for driving a MIP liquid crystal panel. The MIP liquid crystal panel has a plurality of pixels, each of which includes a memory element and a display element. The memory element holds electric potential depending on an image signal. The display element is applied voltage depending on the electric potential which the memory element holds. The liquid crystal control circuit includes an inversion unit that inverts polarity of AC voltage in a first mode in which an enable signal is output. The AC voltage being is applied to the display element in synchronization with outputting of the enable signal. The enable signal activates the image signal output to the MIP liquid crystal panel.