System for producing an image from a sequence of pixels

• US 5,032,924 A
• Filed: 04/10/1989
• Issued: 07/16/1991
• Est. Priority Date: 04/10/1989
• Status: Expired due to Fees

• Current Assignee: Nilford Laboratories Incorporated
• Original Assignee: Nilford Laboratories Incorporated
• Inventors: Brown, Wendell D., Glaser, William T.
• Primary Examiner(s): Chin, Tommy P.
• Application Number:
  US07/335,640
• Time in Patent Office: 827 Days
• Field of Search: 358/231, 358/60, 358/206, 358/208
• US Class Current: 348/759
• CPC Class Codes: H04N 1/113 using oscillating or rotating mirrors
• CPC Class Codes: H04N 1/193 using electrically scanned linear arrays , e.g. linear CCD arrays
• CPC Class Codes: H04N 1/40037 the reproducing element being a laser
• CPC Class Codes: H04N 3/08 having a moving reflector
• 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 system for producing an image by a sequence of intensity values representing pixels of the image which employs means for scanning the image at a non-linear rate and further, includes means modulating the basic illumination and intensity of pixels as a function of scanning speed. The scanner provides a reciprocating scan and in a specific embodiment, a bi-directional scan whereby pixels are projected during both forward and reverse line sweep. The scan pattern is typically sinusoidal but can be any repeatable scan. The rate of output of video data is proportional to the rate of scan as is the average intensity of the output.

Claims

1. A system for producing an image from a sequence of intensity values representing pixels of said image, said system comprising:

means coupled to receive said sequence of intensity values for displaying said pixels, said displaying means being operative to mechanically project said pixels bidirectionally in a scan, said sequence of intensity values being synchronized with said displaying means to produce individual values of said sequence of intensity values corresponding to position of said pixels in said image;

means coupled to said displaying means for determining said pixel position; and

means coupled to said pixel position determining means for modulating amplitude of said pixels as displayed in response to said individual values.

4. The system according to claim 1, 2 or 3 wherein said intensity modulating means further comprises means for modulating intensity as a function of scan rate such that pixels as displayed are illuminated according to a desired bias.

5. The system according to claim 1, 2 or 3 wherein said pixel position determining means further comprises:

means for predicting said pixel position of said displaying means; and

means coupled to said displaying means for synchronizing said sequence of intensity values to said displaying means in response to said predicted position.

6. The system according to claim 1, 2 or 3 wherein said pixel position determining means further comprises:

means for detecting pixel position of said displaying means; and

means coupled to said displaying means for synchronizing said sequence of intensity values to said displaying means in response to said detected position.

7. The system according to claim 1 or 2, wherein said displaying means is operative to scan at a substantially linear scan rate.

8. The system according to claim 1 or 2, wherein said displaying means is operative to scan at a non-linear scan rate.

9. The system according to claim 8 wherein said intensity modulating means further comprises means for modulating intensity in proportion to said non-linear scan rate such that said pixels as displayed are uniformly illuminated.

10. The system according to claim 9 wherein said scan position determining means further comprises:

means for predicting pixel position of said displaying means; and

means coupled to said displaying means for synchronizing said sequence of intensity values to said displaying means in response to said predicted position.

11. The system according to claim 9 wherein said scan position determining means further comprises:

means for detecting position of said displaying means; and

means coupled to said displaying means for synchronizing said sequence of intensity values to said displaying means in response to said detected position.

12. The system according to claim 7 wherein said intensity modulating means further comprises means for modulating intensity in proportion to said linear scan rate such that said pixels as displayed are uniformly illuminated.

13. The system according to claim 12 wherein said scan position determining means further comprises:

means for predicting pixel position of said displaying means; and

means coupled to said displaying means for synchronizing said sequence of intensity values to said displaying means in response to said predicted position.

14. The system according to claim 12 wherein said scan position determining means further comprises:

means for detecting pixel position of said displaying means; and

means coupled to said displaying means for synchronizing said sequence of intensity values to said displaying means in response to said detected position.

15. The system according to claim 1, 2 or 3 further comprises memory means for storing said intensity values representing said pixels and addressing means for addressing said stored intensity values representing said pixels.

16. The system according to claim 1, 2 or 3 wherein said image has a fixed axis of resolution and a bandwidth-limited axis of resolution, said displaying means further comprises means for projecting sequences of intensity values simultaneously along said fixed axis of resolution while projecting said intensity values representing said pixels sequentially along said bandwidth-limited axis of resolution.

2. A system for producing an image from a sequence of intensity values representing pixels of said image, said system comprising:

means coupled to receive said sequence of intensity values for displaying said pixels, said displaying means being operative to mechanically project said pixels in a scan, said sequence of intensity values being synchronized with said displaying means to produce individual values of said sequence of intensity values in correspondence with position of said pixel in said image;

means coupled to said displaying means for determining pixel position; and

means coupled to said pixel position determining means for modulating amplitude of said pixels as displayed in response to said intensity values.

17. The system according to claim 2 or 3, wherein said displaying means is operative to project said scan of said pixels unidirectionally.

3. A system for producing an image from a sequence of intensity values representing pixels of said image, said system comprising:

means coupled to receive said sequence of intensity values for displaying said pixels, said displaying means being operative to mechanically project a scan of said pixels reciprocatively at a non-linear rate, said sequence of intensity values being synchronized with said displaying means to produce individual values of said sequence of intensity values in correspondence with position of said pixels in said image;

means coupled to said displaying means for determining said pixel position; and

means coupled to said pixel position determining means for modulating amplitude of said pixels as displayed in response to said intensity values.

18. A system for producing an image from a sequence of intensity values representing pixels of said image, said system comprising:

means coupled to receive said sequence of intensity values for displaying said pixels; and

means coupled to said displaying means for projecting said pixels bidirectionally in a scan.

19. A system for producing an image from a sequence of intensity values representing pixels of said image, said system comprising:

means coupled to receive said sequence of intensity values for displaying said pixels; and

means coupled to said displaying means for mechanically projecting a scan of said pixels reciprocatively at a non-linear rate.

20. A method for producing an image from a sequence of intensity values representing pixels of said image, said method comprising the steps of:

mechanically projecting a sequence of said pixels in a scan, said sequence of said pixels having values synchronized to produce intensity corresponding to position of said pixels in said image;

determining said pixel position; and

modulating amplitude of said pixels as displayed in response to said intensity values.

21. A method for producing an image from a sequence of intensity values representing pixels of said image, said method comprising the steps of:

mechanically projecting a sequence of said pixels bidirectionally in a scan, said sequence of said pixels having values synchronized to produce intensity corresponding to position of said pixels in said image;

determining said pixel position; and

modulating amplitude of said pixels as displayed in response to said intensity values.

22. A method for producing an image from a sequence of intensity values representing pixels of said image, said method comprising the steps of:

mechanically projecting a sequence of said pixels reciprocatively at a non-linear rate in a scan, said sequence of said pixels having values synchronized to produce intensity corresponding to position of said pixels in said image;

determining said pixel position; and

modulating amplitude of said pixels as displayed in response to said intensity values.