Industry Patents
Patent: 4912751
Method and Device for Establishing and Writing a Luminous Pattern
(Click image for PDF of full patent)
| Patent Number: |
4912751 |
| Title: |
Method and Device for Establishing and Writing a Luminous Pattern |
| Abstract: |
In a method of establishing and writing a pattern which, when placed in a
light beam from a projector, produces an illuminated area of any shape and
size displayed on a screen, a reference point is defined which, when
projected onto the screen, forms a contrasted light area thereon. The
reference point is moved in the light beam so that its trajectory defines
an illuminated area of required shape displaying this movement. This
trajectory is written onto a pattern storage device simultaneously with or
subsequently to movement of the reference point. The device for
implementing this method comprises a plate incorporating a plurality of
writable locations, a displacement device for moving from location to
location, a pattern defining device, a memorizing device and a pattern
writing device. The method and device are primarily intended for use in
the theatre and entertainment for producing luminous decorative effects
and luminous areas related to the decor, objects and persons in the
projection space.
|
| Country of Issue: |
US |
| First Named Inventor: |
Leclercq |
| Assignee: |
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| Continuation or Divisional of: |
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| International Classification: |
G03B 21/00 |
| US Classification: |
353/44 |
| Issue Date: |
03-27-1990 |
| Filing Date: |
05-10-1988 |
| Application : |
192762 |
| Notes: |
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| Link to Patent at freepatentsonline.com: |
4912751 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
4912751 at Google Patents |
1. The Google Patents and World Patent Family links will likely not work until a few weeks
after the patent has issued - they take a while to get new patents in their systems.
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