Image-sensing display panels with LCD display panel and photosensitive element array

• US 5,340,978 A
• Filed: 04/21/1993
• Issued: 08/23/1994
• Est. Priority Date: 09/30/1992
• Status: Expired due to Term

• Current Assignee: Bell Semiconductor, LLC (Hilco Inc. (d/b/a Hilco Global))
• Original Assignee: LSI Logic Corporation (Broadcom, Inc.)
• Inventors: Sanders, David E., Rostoker, Michael D.
• Primary Examiner(s): Nelms, David C.
• Application Number:
  US08/051,028
• Time in Patent Office: 489 Days
• Field of Search: 250/208.1, 250/208.2, 250/216, 345/50, 345/51, 358/482, 358/483, 359/243, 359/244, 359/265, 359/36, 359/53
• US Class Current: 250/208.1
• CPC Class Codes: H01L 27/14625 Optical elements or arrangements associated with the device
• CPC Class Codes: H01L 27/14645 Colour imagers
• CPC Class Codes: H04N 23/55 Optical parts specially adapted for electronic image sensors; Mounting thereof
• CPC Class Codes: H04N 23/63 by using electronic viewfinders
• CPC Class Codes: H04N 25/00 Circuitry of solid-state image sensors [SSIS]; Control thereof

Abstract

A camera comprising various arrangements for employing optical elements in association with photosensitive elements are described. In some of the arrangements, the optical elements are formed integrally with a substrate containing the photosensitive elements. In other arrangements, an optical element is mounted to a package, or the like, containing the substrate and photosensitive elements. In other arrangements, two or more optical elements are employed, including conventional refractive elements, refractive focusing elements, and refractive beam splitting elements. Utility as solid state image sensors is discussed. Utility for monochromatic and color imaging is discussed. Various devices based on such camera arrangements and methods of making same are discussed.

Claims

1. An image-sensing display panel, comprising:

an LCD display panel;

a substrate having;

an array of photosensitive elements disposed on a surface of the substrate; and

an optically transmissive layer above and contiguous with the array, wherein said transmissive layer is capable of focusing light onto said array;

wherein said LCD display panel, and said substrate are aligned along the same optical path.

2. An image-sensing display panel according to claim 1, wherein:

said optically transmissive layer comprises a binary lens capable of focusing light onto the array.

3. An image-sensing display panel according to claim 1, wherein:

the substrate is positioned behind the LCD display panel along the optical path.

4. An image-sensing display panel according to claim 3, further comprising:

means for causing the LCD display panel to alternate between displaying an image and a transparent state.

5. An image-sensing display panel according to claim 4, further comprising:

means for monitoring an output of the array of photosensitive elements only during periods of transparency of the LCD display panel.

9. An image-sensing display panel according to claim 1, wherein:

the substrate is glass.

10. An image-sensing display panel according to claim 1, wherein:

the substrate is a ceramic material.

11. An image-sensing display panel according to claim 1, wherein:

the substrate is a transparent plastic material.

12. An image-sensing display panel according to claim 1, wherein:

the LCD display panel and the substrate are sized to approximately match the dimensions of a sheet.

13. An image-sensing display panel according to claim 12, wherein:

a focal length and direction of aim of said optically transmissive layer are arranged such that light from an object held at a specific distance from the substrate is focused onto the array of photo-sensitive elements.

14. An image-sensing display panel according to claim 1, wherein:

the substrate is positioned behind the optically transmissive layer along the optical path; and

the LCD display panel is positioned behind the substrate along the optical path.

15. An image-sensing display panel according to claim 1, wherein:

the LCD display panel is positioned behind the optically transmissive layer along the optical path; and

the substrate is positioned behind the LCD display panel along the optical path.

16. An image-sensing display panel according to claim 1, wherein:

the optically transmissive layer is positioned behind the LCD display panel along the optical path; and

the substrate is positioned behind the optically transmissive layer along the optical path.

17. An image-sensing display panel according to claim 1, wherein:

the LCD display panel, in an "opaque" state passes at least one light frequency not visible to the human eyes; and

the photo-sensitive elements are sensitive only to the at least one light frequency passed by the LCD display panel in the "opaque" state.

18. An image sensing display panel according to claim 17, wherein:

the at least one light frequency passed by the LCD display panel in the "opaque" state includes an infra-red light frequency.

19. An image sensing display panel according to claim 1, further comprising:

digital processing circuitry;

wherein;

the digital processing circuitry includes substantially all of the circuitry required to implement a digital computer.

6. An image sensing display panel according to claim I, wherein:

the LCD display panel is positioned behind the substrate along the optical path.

7. An image-sensing display panel according to claim 6, further comprising:

means for back-lighting the LCD display panel; and

means for causing the LCD display panel to alternate between displaying and image and an opaque state.

8. An image-sensing display panel according to claim 7, further comprising:

means for monitoring an output of the array of photo-sensitive elements only during periods of opacity of the LCD display panel.

20. A full page scanner, comprising:

an LCD display panel;

an substrate having an array of photosensitive elements disposed on a surface of the substrate; and

an optically transmissive layer above and contiguous with the array, wherein said transmissive layer is capable of focusing light onto said array;

wherein;

said LCD display panel, said optically transmissive layer, and said substrate are aligned along the same optical path.

21. A full page scanner according to claim 20, wherein:

the LCD display panel and the substrate are sized to approximately match the dimensions of a sheet.

22. A full page scanner according to claim 21, wherein:

a focal length and direction of aim of said optically transmissive layer are arranged such that light from an object held at a specific distance from the substrate is focused onto the array of photo-sensitive elements.

23. A full page scanner according to claim 22, wherein:

the specific distance is zero, corresponding to an object held against the substrate.

24. A full page scanner according to claim 20, wherein:

the substrate is formed by depositing amorphous silicon on a continuous sheet.

25. A full page scanner according to claim 24, wherein:

the continuous sheet is metal.

26. A full page scanner according to claim 20, wherein:

ther substrate is formed by depositing polysilicon on a continuous sheet.

27. A full page scanner according to claim 26, wherein:

the continuous sheet is metal.

28. A camera chip comprising:

an LCD display panel;

a substrate having;

an array of photosensitive elements disposed on a surface of the substrate; and

an optically transmissive layer above and contiguous with the array, wherein said transmissive layer is capable of focusing light onto said array;

means for back-lighting the LCD display panel; and

means for causing the LCD display panel to alternate between displaying an image and an opaque state;

wherein;

said LCD display panel, and said substrate are aligned along the same optical path;

the LCD digital panel is positioned behind the substrate along the optical path.

29. A camera chip according to claim 28, wherein:

alternation of the LCD display panel occurs at a rate which is faster than the human eye can perceive.

30. A camera chip according to claim 29, wherein:

the "opaque" state of the LCD display panel is used to block light from the means for back-lighting from reaching the array of photosensitive elements.

31. A camera chip comprising:

an LCD display panel;

a substrate having;

an array of photosensitive elements disposed on a surface of the substrate; and

an optically transmissive layer above and contiguous with the array, wherein said transmissive layer is capable of focusing light onto said array;

means for back-lighting the LCD display panel; and

means for causing the LCD display panel to alternate between displaying and image and a light transmissive state;

wherein;

said LCD display panel, and said substrate are aligned along the same optical path;

the LCD display panel is positioned ahead of the substrate along the optical path.

32. A camera chip according to claim 31, wherein:

alternation of the LCD display panel occurs at a rate which is faster than the human eye can perceive.

33. A camera chip according to claim 31, further comprising:

means for controlling the degree of light transmissivity of the LCD display panel when it is in a light transmissive state.

34. A camera chip according to claim 33, wherein:

the degree of light transmissivity is used to provide an "iris" function for the array of photosensitive elements.

35. A camera chip according to claim 33, wherein:

the degree of light transmissivity is used to provide a "shutter" function for the array of photosensitive elements.