公开(公告)号：US20240385413A1

公开(公告)日：2024-11-21

申请号：US18461529

申请日：2023-09-06

Applicant: BENQ CORPORATION

Inventor： Chia-Nan Shih ,  Ming-Sheng Tai

IPC: G02B7/40 ,  G03B21/14

Abstract: A projection apparatus including a projection module, a projection lens, an actuator, a distance sensor and a controller is provided. The projection module is adapted to project an image beam onto a projection surface to generate a projection image. The projection lens is disposed on a transmission path of the image beam. The actuator is connected to the projection lens and configured to adjust a focal length of the projection lens. The distance sensor is configured to sense a projection distance between the projection apparatus and the projection surface. The controller is electrically connected to the projection module, the actuator and the distance sensor, and is configured to adjust the focal length of the projection lens according to a look-up table and the projection distance sensed by the distance sensor, so as to perform automatic focusing. The lookup table includes a plurality of focal-length segments. The focal length falls within one of the focal-length segments. After confirming an end of a focus adjustment phase, the controller updates a minimum value and a maximum value of the one of the focal-length segments. An auto-focus method is also provided.

公开(公告)号：US09904381B2

公开(公告)日：2018-02-27

申请号：US14972045

申请日：2015-12-16

Applicant: BENQ CORPORATION

Inventor： Shuo-Yen Ho ,  Ming-Sheng Tai

IPC: G06F3/033 ,  G06F3/038 ,  G06F3/0354 ,  H04N21/00

CPC classification number: G06F3/0383 ,  G06F3/03543 ,  G06F3/0362 ,  H04N21/00

Abstract: A method capable of automatically switching operation modes is applied to a multi-functional mouse device which has a first operation mode and a second operation mode. The multi-functional mouse device can move over a plane formed by a first axis and a second axis perpendicular to each other, and includes a coordinate positioning unit suitable for the second operation mode. The method includes detecting whether the coordinate positioning unit generates a first axial signal, detecting whether the coordinate positioning unit generates a second axial signal within a first predetermined period, determining whether continued time of the first axial signal and the second axial signal exceed over a second predetermined period, and determining whether the multi-functional mouse device is switched from the first operation mode to the second operation mode according to a determination result.

公开(公告)号：US20160179219A1

公开(公告)日：2016-06-23

申请号：US14972045

申请日：2015-12-16

Applicant: BENQ CORPORATION

Inventor： Shuo-Yen Ho ,  Ming-Sheng Tai

IPC: G06F3/038 ,  G06F3/0338 ,  G06F3/0354

CPC classification number: G06F3/0383 ,  G06F3/03543 ,  G06F3/0362 ,  H04N21/00

Abstract: A method capable of automatically switching operation modes is applied to a multi-functional mouse device which has a first operation mode and a second operation mode. The multi-functional mouse device can move over a plane formed by a first axis and a second axis perpendicular to each other, and includes a coordinate positioning unit suitable for the second operation mode. The method includes detecting whether the coordinate positioning unit generates a first axial signal, detecting whether the coordinate positioning unit generates a second axial signal within a first predetermined period, determining whether continued time of the first axial signal and the second axial signal exceed over a second predetermined period, and determining whether the multi-functional mouse device is switched from the first operation mode to the second operation mode according to a determination result.

Abstract translation: 能够自动切换操作模式的方法被应用于具有第一操作模式和第二操作模式的多功能鼠标装置。 多功能鼠标装置可以在由彼此垂直的第一轴和第二轴形成的平面上移动，并且包括适合于第二操作模式的坐标定位单元。 该方法包括检测坐标定位单元是否产生第一轴向信号，检测坐标定位单元是否在第一预定周期内产生第二轴向信号，确定第一轴向信号和第二轴向信号的持续时间是否超过第二轴 根据确定结果确定多功能鼠标装置是否从第一操作模式切换到第二操作模式。