公开(公告)号：US20240040095A1

公开(公告)日：2024-02-01

申请号：US18358014

申请日：2023-07-24

申请人： Coretronic Corporation

发明人： Kun-Hong Chen ,  Yi-Jun Liao ,  Yu-Hsuan Hsieh ,  Yun-Shih Chen

IPC分类号： H04N9/31

CPC分类号： H04N9/3194 ,  H04N9/3182 ,  H04N9/3111

摘要： A projection system includes a projection device, a light sensor, a control unit, and an arithmetic unit. The projection device is configured to project an image beam toward a projection surface. The light sensor is configured to sense at least one of a background beam and the image beam reflected by the projection surface and obtaining chromaticity information. The control unit is electrically connected to the projection device, and configured to control the image beam projected by the projection device. The arithmetic unit is electrically connected to the control unit and the light sensor. The arithmetic unit is configured to generate an adjustment signal according to the chromaticity information. The control unit is configured to adjust a color temperature, a brightness, and a color gamut of the image beam according to the adjustment signal. A calibration method of the projection system is also proposed.

公开(公告)号：US20230102421A1

公开(公告)日：2023-03-30

申请号：US17953334

申请日：2022-09-27

申请人： Coretronic Corporation

发明人： Kun-Hong Chen ,  Po-Yen Wu ,  Yu-Hsuan Hsieh

IPC分类号： H04N9/31

摘要： A focus adjustment method, adapted for a projection system is provided. The projection system includes a projection target and a projection device having a range-finding array element and a processor. A plurality of range-finding elements in the range-finding array element define a plurality of measurement mesh points. The focus adjustment method includes the following. A plurality of ranging regions in the measurement mesh points are defined, and each ranging region includes more than one measurement mesh point. All the range-finding elements in the ranging regions perform a ranging measurement to generate a plurality of original ranging values. An averaging calculation is performed on the original ranging values corresponding to each ranging region to generate a plurality of average region ranging values. Whether the average region ranging values are within a preset range is determined to generate an optimal ranging value which is used to adjust a lens focus.

公开(公告)号：US20230362339A1

公开(公告)日：2023-11-09

申请号：US18312573

申请日：2023-05-04

申请人： Coretronic Corporation

发明人： Kun-Hong Chen

IPC分类号： H04N9/31 ,  G06T7/11

CPC分类号： H04N9/3185 ,  G06T7/11 ,  G06T2207/10004

摘要： A method and a projection system for calibrating a projection area of a projector are provided. The method includes the following. A calibration pattern is projected to form a projection area, and includes a first original mark group and a second original mark group. A captured image including the projection area is obtained. Whether the captured image includes a closed area formed by a complete line is determined. A first calibration operation is performed when the captured image does not include the closed area. A second calibration operation is performed when the projection area in the captured image includes the complete closed area. The projection area is calibrated according to a first mark group or a second mark group in the captured image during the first calibration operation. The projection area is calibrated according to the second mark group in the captured image during the second calibration operation.

公开(公告)号：US20230273512A1

公开(公告)日：2023-08-31

申请号：US18169866

申请日：2023-02-15

申请人： Coretronic Corporation

发明人： Kun-Hong Chen ,  Yu-Hsuan Hsieh

IPC分类号： G03B21/20 ,  G06T7/11

CPC分类号： G03B21/206 ,  G03B21/2053 ,  G06T7/11 ,  G06T2207/10004

摘要： A projection system and a control method are provided. The control method includes the following. A projected image is projected on a projection area by a projection device. The projected image is captured in a detection area to generate a captured image by an image capturing device. The detection area includes the projection area. The captured image is received, a virtual frame is generated around the projection area in the captured image, and pixel values of the virtual frame are analyzed to determine whether an object enters the projection area by a processing device. The projection device is controlled to perform a protection operation by the processing device in response to determining that the object enters the projection area.

公开(公告)号：US20240267498A1

公开(公告)日：2024-08-08

申请号：US18411043

申请日：2024-01-12

申请人： Coretronic Corporation

发明人： Yi-Jun Liao ,  Kun-Hong Chen ,  Yu-Hsuan Hsieh ,  Yun-Shih Chen

IPC分类号： H04N9/31

CPC分类号： H04N9/317 ,  H04N9/3191

摘要： A projection device, including a projection module, a projection lens, a distance sensor, a focus adjustment module, and a control unit, is provided. The projection module is configured to generate an image beam. The projection lens is disposed on a transmission path of the image beam. The focus adjustment module is connected to the projection lens. The control unit is configured to enable the projection device to enter a focus mode; enable the projection module to project the image beam to a projection surface; enable the distance sensor to sense a projection distance; calculate a focus adjustment parameter by using an auto focus transfer function according to the projection distance; and control the focus adjustment module to adjust a focal length of the projection lens according to the focus adjustment parameter. An auto focus method is also provided.