Prismatic optical display

• US 6,755,534 B2
• Filed: 08/24/2001
• Issued: 06/29/2004
• Est. Priority Date: 08/24/2001
• Status: Expired due to Fees

• Current Assignee: Brookhaven Science Associates, LLC (Government of the United States of America)
• Original Assignee: Brookhaven Science Associates, LLC (Government of the United States of America)
• Inventors: DeSanto, Leonard, Veligdan, James T., Brewster, Calvin
• Primary Examiner(s): Adams, Russell
• Assistant Examiner(s): Cruz, Magda
• Application Number:
  US09/939,069
• Publication Number:
  US 20030038924A1
• Time in Patent Office: 1,040 Days
• Field of Search: 353/34, 353/35, 353/38, 353/74, 353/77, 353/78, 359/443, 359/459, 385/901, 385/129, 385/130, 385/131, 385/132
• US Class Current: 353/38
• CPC Class Codes: G03B 21/625 Lenticular translucent screens
• CPC Class Codes: H04N 5/7416 involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal

Abstract

A spatially modulated light beam is projected, reflected, and redirected through a prismatic optical panel to form a video image for direct viewing thereon.

Claims

1. An optical display system for displaying a projected image, comprising:

a projector that projects an image beam that forms the projected image;

a prismatic optical panel, wherein said panel includes a prismatic first side optically aligned with said projector for receiving said image beam at an acute angle of incidence thereto, wherein said panel is effective for reflecting said image beam, wherein said panel displays said reflected image beam from an opposite second side thereof; and

a light control layer at said panel second side, wherein said light control layer comprises microlouvers which direct the projected image to a desired location, and wherein said microlouvers are dark in color such that ambient light is absorbed thereby enhancing contrast of said projected image.

2. A display system according to claim 1 wherein said microlouvers are encased in a thin film comprised of plastic or glass.

3. A method of displaying a projected image, said method comprising the steps of:

projecting an image beam with a projector, said image beam forming the projected image;

receiving, turning, and displaying said image beam with a prismatic optical panel, wherein said panel includes a prismatic first side optically aligned with said projector, wherein said step of receiving said image beam occurs at an acute angle of incidence to the panel first side, wherein said step of displaying said image beam occurs at a panel second side which is opposite to the panel first side; and

directing the projected image to a desired location with a light control layer at said panel second side, wherein said light control layer comprises microlouvers, and wherein said microlouvers are dark in color such that ambient light is absorbed thereby enhancing contrast of said projected image.

4. A method according to claim 3, wherein said microlouvers are encased in a thin film comprised of plastic or glass.