X-Ray sensitive electrophoretic imagers

• US 4,414,679 A
• Filed: 03/01/1982
• Issued: 11/08/1983
• Est. Priority Date: 03/01/1982
• Status: Expired due to Fees

• Current Assignee: North American Philips Corp. (Koninklijke Philips N.V.)
• Original Assignee: North American Philips Corp. (Koninklijke Philips N.V.)
• Inventors: Liebert, Richard B., Haarman, Johan W.
• Primary Examiner(s): Smith, Alfred E.
• Assistant Examiner(s): Grigsby, T. N.
• Application Number:
  US06/353,557
• Time in Patent Office: 617 Days
• Field of Search: 378/28, 378/29, 378/154, 378/31, 378/30, 378/149, 250/363 S
• US Class Current: 378/29
• CPC Class Codes: G02F 1/167 by electrophoresis
• CPC Class Codes: G03G 17/04 using photoelectrophoresis
• CPC Class Codes: G21K 1/025 using multiple collimators, e.g. Bucky screens; other devices for eliminating undesired or dispersed radiation

Abstract

A grid type substrate is constructed to support an X-ray sensitive material at one side of an electrophoretic display device. The grid structure may be X-ray absorbent material supported between X-ray transparent supports. Various arrangements of the X-ray absorbent grid may be provided.

Claims

1. In an X-ray sensitive structure including an X-ray sensitive material supported by a substrate-type material, the improvement comprising said substrate-type material being a pair of X-ray transparent supports separated at a distance, and a grid-type structure sandwiched between said supports, wherein spaces between said grid type structure are filled with a foamed-in-place material.

2. A structure according to claim 1, wherein said supports are one of graphite, glass, plastic, or low atomic number metal.

3. A structure according to claim 1, wherein said grid type structure is an x-ray absorber.

4. A structure according to claim 1, wherein said grid type structure is a parallel grid.

5. A structure according to claim 1, wherein said grid type structure is a crossed grid.

6. A structure according to claim 1, wherein said grid type structure is focused.

7. A structure according to claim 1, wherein said grid type structure is one of a spiral structure, a honey-comb structure, or a non-square structure.

8. An X-ray electrophoretic display device comprising an electrophoretic cell

an X-ray sensitive material in contact with one side of said electrophoretic cell, and

a substrate support for said X-ray sensitive material including a pair of X-ray transparent surfaces separated at a distance, and a grid-type structure sandwiched between said surfaces.

9. An X-ray type electrophoretic display device according to claim 8, wherein said X-ray transparent surfaces are one of graphite, glass, a low atomic number metal, or a plastic.

10. An X-ray type electrophoretic display device according to claim 9, wherein said low atomic number metal is one of aluminum or beryllium.

11. An X-ray type electrophoretic display device according to claim 9, wherein said plastic is one of polycarbonate, polymethylmethacrylate, or nylon.

12. An X-ray type electrophoretic display device according to claim 8, wherein said grid-type structure is an X-ray absorber.

13. An X-ray type electrophoretic display device according to claim 8, wherein spaces between said grid-type structure are filled with a foamed-in-place material.

14. An X-ray type electrophoretic display device according to claim 8, wherein said grid type structure is formed of lead.

15. An X-ray type electrophoretic display device according to claim 8, wherein said grid type structure is a parallel grid.

16. An X-ray type electrophoretic display device according to claim 8, wherein said grid type structure is a crossed grid.

17. An X-ray type electrophoretic display device according to claim 8, wherein said grid type structure is focused.

18. An X-ray type electrophoretic display device according to claim 8, wherein said grid type structure is one of a spiral structure, a honey-comb structure or a non-square structure.