公开(公告)号：US11468805B2

公开(公告)日：2022-10-11

申请号：US17526597

申请日：2021-11-15

Applicant: SEIKO EPSON CORPORATION

Inventor： Toru Aoki

IPC: G09G3/00 ,  G09G3/36 ,  G03B21/00

Abstract: A liquid crystal projector includes a red liquid crystal panel, a green liquid crystal panel, a blue liquid crystal panel, a green liquid crystal panel, an optical shift element configured to shift an emission optical path of a synthesized image of each liquid crystal panel, and a control circuit configured to control these. The control circuit controls the optical shift element to set a projection position to a projection position (A) in a subframe f1 and to a projection position (B) in a subframe f2. The control circuit causes a resolution of the liquid crystal panel expressed in the subframes f1 and f2 to be lower than the resolution of the liquid crystal panel expressed in the subframes f1 and f2.

公开(公告)号：US12211409B2

公开(公告)日：2025-01-28

申请号：US18239937

申请日：2023-08-30

Applicant: SEIKO EPSON CORPORATION

Inventor： Toru Aoki ,  Hiroyuki Hosaka ,  Yusuke Komuro

IPC: G09G3/00 ,  G09G3/36

Abstract: A projection-type display apparatus includes a liquid crystal panel including a panel pixel, an optical path shifting element that shifts a projected pixel projected from the panel pixel, and a display control circuit that controls the liquid crystal panel and the optical path shifting element. The display control circuit supplies, to the liquid crystal panel, the same data signal and controls the projected pixel to be at a same position in each of a unit period f1-1 and a unit period f2-1, and controls the optical path shifting element to cause a shift direction from the projected pixel before the shift toward the projected pixel after the shift from a unit period f1-2 to a unit period f1-4 to be opposite to the shift direction from the projected pixel before the shift toward the projected pixel after the shift from a unit period f2-2 to a unit period f2-4.

公开(公告)号：US12149871B2

公开(公告)日：2024-11-19

申请号：US18372404

申请日：2023-09-25

Applicant: SEIKO EPSON CORPORATION

Inventor： Toru Aoki ,  Hiroyuki Hosaka

IPC: H04N9/31 ,  G09G3/00 ,  G09G5/391

Abstract: A projector including an electro-optical panel in which a plurality of pixels are arrayed, an optical path shifting element configured to change an optical path of light emitted from the plurality of pixels, and a control circuit configured to control a state of the optical path shifting element such that light emitted from a predetermined pixel among the plurality of pixels reaches a first position on a display screen in the first unit period, control a state of the optical path shifting element such that light emitted from the predetermined pixel reaches a second position on the display screen in the second unit period, and control a state of the optical path shifting element in a transition period in which a unit period transitions from the first unit period to the second unit period based on a type of image indicated by an input image signal.

公开(公告)号：US12198587B2

公开(公告)日：2025-01-14

申请号：US18239926

申请日：2023-08-30

Applicant: SEIKO EPSON CORPORATION

Inventor： Toru Aoki ,  Hiroyuki Hosaka ,  Yusuke Komuro

IPC: G09G3/00

Abstract: A projection-type display apparatus includes a liquid crystal panel including a panel pixel, an optical path shifting element that shifts a projected pixel projected from the panel pixel, and a display control circuit that controls the liquid crystal panel and the optical path shifting element. The display control circuit supplies, to the liquid crystal panel, the same data signal and controls the projected pixel to be at a same position in a unit period f1-1 and a unit period f2-1 period, and controls the optical path shifting element to cause the position of the projected pixel in each of a unit period f1-2 to a unit period f1-4, to be different from the position of the projected pixel in a respective one of a unit period f2-2 to a unit period f2-4.

公开(公告)号：US11837186B2

公开(公告)日：2023-12-05

申请号：US17726188

申请日：2022-04-21

Applicant: SEIKO EPSON CORPORATION

Inventor： Daigo Hokazono ,  Toru Aoki ,  Kazuhisa Mizusako

IPC: G09G3/36 ,  G09G3/00 ,  G09G3/20

CPC classification number: G09G3/36 ,  G09G3/002 ,  G09G3/2003 ,  G09G3/2007 ,  G09G3/3648 ,  G09G2320/0252 ,  G09G2320/0257 ,  G09G2320/0261 ,  G09G2320/0285 ,  G09G2320/0666

Abstract: When, in a liquid crystal projector, optical responsiveness of a liquid crystal panel corresponding to G is better than optical responsiveness of a liquid crystal panel corresponding to R, a display control circuit performs a tr correction and a tf correction of overdrive processing for R, and performs only the tr correction of the overdrive process for G, and does not perform the tf correction for G. The display control circuit performs a black floating process for R, G, and B.

公开(公告)号：US12260795B2

公开(公告)日：2025-03-25

申请号：US18617892

申请日：2024-03-27

Applicant: SEIKO EPSON CORPORATION

Inventor： Toru Aoki ,  Kazuhisa Mizusako ,  Yusuke Komuro

IPC: G09G3/36 ,  G09G3/00

Abstract: A projection type display apparatus includes a liquid crystal panel including a first panel pixel, a liquid crystal panel including a second panel pixel, an optical path shift element that shifts projection positions of the first panel pixel and the second panel pixel, and a display control circuit that controls the liquid crystal panel and the optical path shift element. The display control circuit causes the optical path shift element to shift the projection position from a first unit period to a fourth unit period of one frame period for each unit period. A centroid of a path on which the first panel pixel is projected from the first unit period to the fourth unit period is different from a centroid of a path on which the second panel pixel is projected from the first unit period to the fourth unit period.

公开(公告)号：US11659147B2

公开(公告)日：2023-05-23

申请号：US17527613

申请日：2021-11-16

Applicant: SEIKO EPSON CORPORATION

Inventor： Toru Aoki ,  Shinichi Wakabayashi ,  Masatoshi Ito ,  Daigo Hokazono

IPC: H04N9/31 ,  G02F1/13

CPC classification number: H04N9/315 ,  G02F1/1313 ,  H04N9/3111

Abstract: A liquid crystal projector includes a liquid crystal panel configured to generate a modulated image, a sensor configured to detect a temperature of the liquid crystal panel, an optical shift element configured to shift an emission optical path of the modulated image generated by the liquid crystal panel, and a control circuit configured to control a velocity of a shift in the optical shift element according to the temperature detected by the sensor.

公开(公告)号：US11994774B2

公开(公告)日：2024-05-28

申请号：US17827826

申请日：2022-05-30

Applicant: SEIKO EPSON CORPORATION

Inventor： Akihide Haruyama ,  Toru Aoki

IPC: G02F1/1335 ,  G02F1/13363 ,  G03B21/00 ,  G03B33/12

CPC classification number: G02F1/133638 ,  G02F1/133526 ,  G02F1/133528 ,  G03B21/006 ,  G02F2201/38 ,  G02F2203/01 ,  G02F2413/02 ,  G02F2413/08 ,  G03B33/12

Abstract: In an electro-optical device, a first polarizing element, a first phase difference element, a transmissive liquid crystal panel, a second phase difference element, and a second polarizing element are sequentially arranged. Here, when a phase difference of the first phase difference element and the second phase difference element is λ/4, an influence of orientation disorder of liquid crystal molecules can be alleviated, but a contrast ratio is reduced. Therefore, when a wavelength of incident light is λ, a phase difference R of the first phase difference element and the second phase difference element satisfies the following condition that 0

公开(公告)号：US11895443B2

公开(公告)日：2024-02-06

申请号：US17848541

申请日：2022-06-24

Applicant: SEIKO EPSON CORPORATION

Inventor： Toru Aoki

IPC: G09G3/36 ,  H04N9/31

CPC classification number: H04N9/3135 ,  H04N9/312 ,  H04N9/3132

Abstract: A projector includes: an electro-optical panel including a plurality of pixels; an optical-path shift element configured to change an optical path of light emitted from the plurality of pixels; and an image processing circuit configured to, in a unit period, supply an image signal to the plurality of pixels in an order, the unit period being included in one frame period for displaying an image of one frame indicated by an input image signal, the image signal corresponding to the plurality of pixels and being generated on a basis of the input image signal, in which the image processing circuit includes an adjustment circuit configured to adjust a response velocity of the plurality of pixels when the image displayed by the electro-optical panel is switched, on a basis of an order of supply of the image signal or of a position of a pixel at the electro-optical panel.

公开(公告)号：US11295683B2

公开(公告)日：2022-04-05

申请号：US17075699

申请日：2020-10-21

Applicant: SEIKO EPSON CORPORATION

Inventor： Toru Aoki ,  Daigo Hokazono ,  Kazuhisa Mizusako

IPC: G09G3/36 ,  G02F1/133

Abstract: In a liquid crystal projector, in a first liquid crystal panel corresponding to a first color, a gray scale level specified by video data specifies a first value in a first field, and a second value in a second field subsequent to the first field, and in a second liquid crystal panel corresponding to a second color, a gray scale level specified by the video data specifies the first value in the first field, and the second value in the second field. When optical responsiveness of the first liquid crystal panel is better than optical responsiveness of the second liquid crystal panel, in the second field, a liquid crystal voltage applied to the first liquid crystal panel is smaller than a liquid crystal voltage applied to the second liquid crystal panel.