1
Emanuel Sachs, Che Chih Tsao: Method for photo-forming small shaped metal containing articles from porous precursors. Massachusetts Institute of Technology, Steven J Weissburg, April 30, 1996: US05512162 (94 worldwide citation)

The invention is a method for making a metal containing article, comprising the steps of: providing a layer of a porous ground in a selected area; exposing selected regions of the layer of porous ground to light, thereby metallizing the selected regions; repeating the foregoing steps a selected numb ...


2
Che Chih Tsao: Pattern projection techniques for volumetric 3D displays and 2D displays. November 1, 2005: US06961045 (47 worldwide citation)

This invention relates generally to image projection methods and apparatus for creating color or gray scale images using spatial light modulators (SLMs) without color or gray capability. The basic concept is to divide the pixels on a single SLM into multiple groups and then illuminate each group wit ...


3
Che Chih Tsao: Method and apparatus for displaying volumetric 3D images. July 20, 2004: US06765566 (40 worldwide citation)

This invention relates generally to new and improved methods and apparatus for displaying volumetric 3D images with colors and for barrier-free interaction with the 3D images. A raw 3D dataset is first processed into a viewable data with a geometry description in the form of a collection of scattere ...


4
Che Chih Tsao, Zhen Hong Zhou, Albert K Hu: Method and apparatus for displaying three-dimensional volumetric images. Wolf Greenfield & Sacks P C, May 19, 1998: US05754147 (23 worldwide citation)

This invention relates generally to three dimensional volumetric display. Optical data is supplied by an optical data generator through an optical interfacing unit to a rotating display which produces three dimensional volumetric images. The optical interfacing unit transforms non-rotating incoming ...


5
Che Chih Tsao: Moving screen projection technique for volumetric three-dimensional display. September 21, 1999: US05954414 (23 worldwide citation)

This invention relates generally to new and improved approaches for displaying volumnetric three-dimensional (3D) images. The basic idea features new optical-mechanical mechanisms enabling creation of volumetric 3D images by successive projection of whole frames of 2D images. This new method project ...


6
Che Chih Tsao: Moving screen projection technique for volumetric three-dimensional display. October 16, 2001: US06302542 (22 worldwide citation)

This invention relates generally to improved approaches for displaying volumetric three-dimensional (3D) images. The basic idea features improved optical-mechanical mechanisms enabling creation of volumetric 3D images by successive projection of whole frames of 2D images, through an optical-mechanic ...


7
Che Chih Tsao: Error correction schemes for volumetric 3D displays. April 6, 2010: US07692605 (16 worldwide citation)

This invention describes methods and systems for correcting frame position error on one category of volumetric 3D displays that generates volumetric 3D images by using a rotary mechanism to move a screen to sweep a volume and projecting 2D profile images on the screen. The screen motion is in genera ...


8
Che Chih Tsao: Data rendering method for volumetric 3D displays. April 20, 2010: US07701455 (3 worldwide citation)

The fundamental concept of expressing brightness level of a geometric primitive is to control the number of rendered display elements, representing desired brightness level, in the geometric primitive as a fraction of the maximum number of display elements, representing the maximum brightness level, ...


9
Che Chih Tsao: Methods and systems of rapid focusing and zooming for volumetric 3D displays and cameras. April 26, 2011: US07933056 (3 worldwide citation)

This invention relates in general to methods and systems of rapid focusing and zooming for the applications in the projection of volumetric 3D images and in the imaging of 3D objects. Rapid variable focusing or zooming is achieved by rapid and repeated change of the object distance or the spacing be ...


10
Che Chih Tsao: Active screen volumetric 3D display. September 20, 2011: US08022895 (1 worldwide citation)

The volumetric 3D display system of this invention applies a moving display panel that sweeps a display space. The full volume swept by the active screen is used as display space. A 3D image to be displayed is first processed into slices of image data based on an orthogonal 3D grid structure. The sl ...