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    • 8. 发明授权
    • Projector and camera arrangement with shared optics and optical marker for use with whiteboard systems
    • 投影机和相机配置共享光学和光学标记与白板系统一起使用
    • US06707444B1
    • 2004-03-16
    • US09644980
    • 2000-08-18
    • Ferdinand HendriksFuad Elias DoanyZon-Yin ShaeBelle L. TsengXiping Wang
    • Ferdinand HendriksFuad Elias DoanyZon-Yin ShaeBelle L. TsengXiping Wang
    • G09G500
    • G06F3/0425G06F3/03542
    • Projector and camera arrangements are provided for use in electronic whiteboard systems. Specifically, the present invention provides projector and camera arrangements wherein the projector and camera share the same imaging optics. By sharing the same projection and camera optics, the distortions that affect the projection system are the same as those of the camera system. Thus, the calibration step required in conventional whiteboard systems where the projector and camera are separate, i.e., each having their own distinct optics and settings, is no longer needed. Further, the arrangements provided in accordance with the invention are self-aligning, even when lens distortions are large and even in the presence of strong perspective effects. The shared optics projector and camera arrangements of the invention also provide for dynamic zooming. In addition, various active and passive optical marker or lightpen designs are provided for use in electronic whiteboard systems.
    • 提供投影机和照相机布置用于电子白板系统。 具体地,本发明提供了投影仪和照相机装置,其中投影仪和照相机共享相同的成像光学元件。 通过共享相同的投影和相机光学元件,影响投影系统的失真与相机系统的失真相同。 因此,不再需要常规白板系统中投影机和相机分开,即每个具有其独特的光学和设置的校准步骤。 此外,根据本发明提供的布置是自对准的,即使当透镜变形较大并且即使存在强的透视效果时。 本发明的共享光学投影仪和照相机布置还提供动态缩放。 此外,还提供了用于电子白板系统中的各种有源和无源光学标记或光笔设计。
    • 10. 发明授权
    • Compact rear projection display with telescopic screen and variable image size
    • 紧凑型背投式显示屏,可伸缩屏幕和可变图像尺寸
    • US06219183B1
    • 2001-04-17
    • US08840949
    • 1997-04-21
    • Fuad Elias Doany
    • Fuad Elias Doany
    • G03B2156
    • G03B21/58G03B21/10G03B21/62
    • A rear projection display is disclosed having a projection device, a screen, and a screen moving device. The projection devise projects an image, the screen is provided for displaying the image, and the screen moving device is used to move the screen in relation to the projection device. The screen moving device has a first frame attached to the screen that telescopically move over a second frame to extend and retract the screen. In the retracted position, the screen is flush with a display box that contains the projection device. As the screen moves away from the projection device, the image increases in size. The projection device includes a projection lens which may be a fixed focal length lens. Two folding mirrors of the projection device provide a folded projection path to reduce a dimension of the display. The screen moving device has an opening to move the screen toward the projection device without interfering therewith. A flexible light blocking material covers the opening.
    • 公开了具有投影装置,屏幕和屏幕移动装置的背投显示器。 投影设备投影图像,提供用于显示图像的屏幕,并且屏幕移动设备用于相对于投影设备移动屏幕。 屏幕移动装置具有附接到屏幕的第一框架,其可伸缩地移动到第二框架上以延伸和缩回屏幕。 在缩回位置,屏幕与包含投影装置的显示盒齐平。 当屏幕远离投影设备移动时,图像的大小增加。 投影装置包括可以是固定焦距透镜的投影透镜。 投影装置的两个折叠镜提供折叠的投影路径以减小显示器的尺寸。 屏幕移动装置具有使屏幕朝向投影装置移动的开口,而不会与屏幕移动。 柔性遮光材料覆盖开口。