Dual mode overhead projection system using field emission device

Optics: image projectors – Miscellaneous

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

353DIG3, G03B 2100

Patent

active

054772842

ABSTRACT:
A dual mode projection system 30 includes a standard field emission device (FED) display panel 44 within a projector base 32. In this way, the light source of a standard overhead projector is replaced by FED panel 44. FED panel 44 is positioned within projector base 32 such that the viewing surface of panel 44 is substantially flush with the top surface of projector base 32. Thus, in a first mode of this dual mode projection system 30, FED panel 44 provides the light source for projecting an image of graphics 48 printed on transparency 46 onto another surface such as a projection screen or wall. FED panel 44 is coupled via connector 36 in projector base 32 and signal cable 38 to host system 40. Host system 40 may comprise the processing unit of a standard notebook computer including a keyboard 42 for data entry. Display information created by the electronics in host system 40 is transmitted through cable 38 to FED display 44. An image 50 created on FED display 44 is projected via lens system 34 onto a large surface such as a screen or wall. The luminescence needed to display image 50 created by FED panel 44 onto a separate surface is provided by the FED panel 44, and no additional light source is required for this projection function. Thus, in the second mode of this dual mode projection system 30, FED panel 44 provides a display of computer-generated images projected onto another surface. The first and second operational modes may be combined to provide a concurrent transparency and computer-generated video display.

REFERENCES:
patent: 4857799 (1989-08-01), Spindt et al.
patent: 4940916 (1990-07-01), Borel et al.
patent: 5194780 (1993-03-01), Meyer
patent: 5194884 (1993-03-01), Parker et al.
patent: 5225820 (1993-07-01), Clerc
patent: 5353075 (1994-10-01), Conner et al.
patent: 5373333 (1994-12-01), Kawada et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Dual mode overhead projection system using field emission device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dual mode overhead projection system using field emission device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual mode overhead projection system using field emission device will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-994974

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.