公开(公告)号：US20190306475A1

公开(公告)日：2019-10-03

申请号：US16363580

申请日：2019-03-25

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Fumihito INUKAI ,  Kosuke KUBOTA ,  Yukihiro CHOKYU

IPC: H04N9/31 ,  H03M1/66

Abstract: The image display system includes a processing unit and a driving unit. The processing unit is configured to receive an image signal indicative of an instruction value of luminance of a light source. The driving unit is configured to supply a drive current to the light source in accordance with the instruction value indicated by the image signal received by the processing unit. The driving unit includes a shaping circuit and an adjusting unit. The shaping circuit includes a plurality of D/A converters and an arithmetic unit. The arithmetic unit is configured to output the drive current to the light source based on a computation result of analog signals outputted from the plurality of D/A converters. The adjusting unit is configured to determine values of digital signals inputted into the plurality of D/A converters of the shaping circuit in accordance with the instruction value.

公开(公告)号：US20240019621A1

公开(公告)日：2024-01-18

申请号：US18373753

申请日：2023-09-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Keiji SUGIYAMA ,  Ken'ichi KASAZUMI ,  Yukihiro CHOKYU ,  Satoshi KUZUHARA ,  Kazuhiro MINAMI

IPC: F21V8/00 ,  G02B5/32

CPC classification number: G02B6/0041 ,  G02B6/0076 ,  G02B5/32 ,  G02B6/0031

Abstract: A light guide plate includes a hologram element that is a first hologram element including two or more diffraction cells, and a hologram element that is a second hologram element including a single diffraction cell.

公开(公告)号：US20200314399A1

公开(公告)日：2020-10-01

申请号：US16822814

申请日：2020-03-18

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Fumihito INUKAI ,  Kosuke KUBOTA ,  Yukihiro CHOKYU

IPC: H04N9/31

Abstract: An image display system includes: a light source driver configured to supply, to a light source, a drive current including a first current and a second current; a processor configured to output the set value of the first current to the light source driver; and a corrector configured to perform a correction process on the first current. The processor is configured to set, based on a correspondence relationship between the gradation value and the current value of the first current, the set value of the first current to a current value determined with reference to the correspondence relationship when the gradation value is in a second gradation range in which numerical values are smaller than numerical values in the first gradation range, the correction process correcting the correspondence relationship such that a difference between a measured intensity and a target intensity of the light source falls within a prescribed range.

公开(公告)号：US20190306474A1

公开(公告)日：2019-10-03

申请号：US16366499

申请日：2019-03-27

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Yukihiro CHOKYU ,  Fumihito INUKAI

IPC: H04N9/31 ,  G06F9/30 ,  G03B21/20

Abstract: The image display system forms an image by scanning with light from a light source of a luminaire. The image display system includes: an input unit configured to receive an image signal indicative of an instruction value of luminance of the light source; and a control unit configured to determine a target value of luminance of the light source based on the instruction value indicated by the image signal received by the input unit. The control unit is configured to perform an adjusting process of setting the target value to an adjusted value different from the instruction value when allowing the light source to emit light based on the image signal.

公开(公告)号：US20240027762A1

公开(公告)日：2024-01-25

申请号：US18375305

申请日：2023-09-29

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ken'ichi KASAZUMI ,  Keiji SUGIYAMA ,  Yukihiro CHOKYU ,  Masafumi SUEYOSHI ,  Kazuhiro MINAMI

IPC: G02B27/01

CPC classification number: G02B27/0103 ,  G02B2027/0105

Abstract: A light guide plate includes a first hologram element including a plurality of diffraction cells. At least one of edge lines of one diffraction cell among the plurality of diffraction cells included in the first hologram element is located at a position other than on extensions of all edge lines of an adjacent diffraction cell adjacent to the one diffraction cell, the adjacent diffraction cell being included in the plurality of diffraction cells.

公开(公告)号：US20220011574A1

公开(公告)日：2022-01-13

申请号：US17484905

申请日：2021-09-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Fumihito INUKAI ,  Toshiya MORI ,  Masanaga TSUJI ,  Ken'ichi KASAZUMI ,  Yukihiro CHOKYU

IPC: G02B27/01 ,  B60W40/10

Abstract: An image display system includes: an image projection unit that projects and displays an image on a display target for a moving body; a posture angle calculation unit that calculates a posture angle for the moving body on the basis of chronological data for acceleration detection values for the acceleration of the moving body in a prescribed time period; and a display control unit that controls the display position at which the image is projected and displayed on the display target, in accordance with the posture angle calculated by the posture angle calculation unit. The acceleration detection values include bi-directional components. The posture angle calculation unit excludes acceleration detection values from the chronological data used when calculating the posture angle, said acceleration detection values being included in an exclusion time period which has a ratio for the bidirectional components, in the prescribed time period, that is outside a prescribed range.