Johnny B Lee

US Patent:

7421111, Sep 2, 2008

Filed:

Nov 7, 2003

Appl. No.:

10/704098

Inventors:

Paul H. Dietz - Hopkinton MA, US
Darren L. Leigh - Belmont MA, US
Ramesh Raskar - Cambridge MA, US
Johnny Chung Lee - Pittsburgh PA, US

Assignee:

Mitsubishi Electric Research Laboratories, Inc. - Cambridge MA

International Classification:

G06K 9/00

US Classification:

382154

Abstract:

An interactive display system includes a pixel-based display surface and a light pen. A sequence of patterns is projected onto the display surface. The sequence of patterns has a unique sequence of light intensities for each location of the display surface. Intensities of light at an arbitrary location are sensed by the light pen while projecting the sequence of patterns. The intensifies of light are decoded to determine coordinates of the arbitrary location.

US Patent:

20050248549, Nov 10, 2005

Filed:

May 6, 2004

Appl. No.:

10/840748

Inventors:

Paul Dietz - Hopkinton MA, US
Darren Leigh - Belmont MA, US
William Yerazunis - Acton MA, US
Johnny Lee - Pittsburgh PA, US

International Classification:

G09G005/00

US Classification:

345179000

Abstract:

Touch screen interfaces suffer from a visual-motor conflict when the user attempt to interact with a virtual object but experiences no physical sensations resulting from that interaction. This can result in uncertainly and decrease performance as well as overall satisfaction with the interface. We introduce a method and device that resolves these issues in stylus-based interfaces for both single and multi-user environments by providing individualized haptic and acoustic feedback. This is achieved by adding a mechanical actuator and acoustic generator to each stylus. These are controlled to respond appropriately to virtual objects and are capable of simulating a variety of physical sensations. Because the feedback is generated by the stylus rather than the screen or touch surface, the current invention can operate at the individual level even in the presence of multiple simultaneous users.

US Patent:

20060170871, Aug 3, 2006

Filed:

Feb 1, 2005

Appl. No.:

11/048545

Inventors:

Paul Dietz - Hopkinton MA, US
Johnny Lee - Pittsburgh PA, US

International Classification:

G03B 21/00

US Classification:

353031000, 353028000

Abstract:

A method for projecting an image projects, optically, an image on a display surface. A presence of a person in a region of projection is detected and a brightness of the image is reduced in response to detecting the presence of the person in the region of projection.