Image display system and method

• US 6,963,319 B2
• Filed: 09/11/2002
• Issued: 11/08/2005
• Est. Priority Date: 08/07/2002
• Status: Expired due to Term

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Long, Michael Douglas, Koegler, John Matthew III, Allen, William J., Howard, P. Guy, Pate, Michael A.
• Primary Examiner(s): Shankar, Vijay
• Assistant Examiner(s): Shapiro, Leonid
• Application Number:
  US10/242,545
• Publication Number:
  US 20040027313A1
• Time in Patent Office: 1,154 Days
• Field of Search: 345/204, 345/132, 345/213, 345/88, 345/30, 345/108, 359/206, 359/291, 359/279, 348/790, 348/739, 348/761
• US Class Current: 345/30
• CPC Class Codes: G09G 2330/08 Fault-tolerant or redundant circuits, or circuits in which repair of defects is prepared
• CPC Class Codes: G09G 2330/10 Dealing with defective pixels
• CPC Class Codes: G09G 2340/0407 Resolution change, inclusive of the use of different resolutions for different screen areas
• CPC Class Codes: G09G 2340/0414 Vertical resolution change
• CPC Class Codes: G09G 2340/0421 Horizontal resolution change
• CPC Class Codes: G09G 2340/0435 Change or adaptation of the frame rate of the video stream
• CPC Class Codes: G09G 3/001 using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background slide projectors per se G03B23/00 = 42 HP
• CPC Class Codes: G09G 3/007 Use of pixel shift techniques, e.g. by mechanical shift of the physical pixels or by optical shift of the perceived pixels
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 3/2022 using sub-frames
• CPC Class Codes: G09G 3/2051 with use of a spatial dither pattern
• CPC Class Codes: G09G 3/346 based on modulation of the reflection angle, e.g. micromirrors micromirrors devices per se G02B26/0833
• CPC Class Codes: G09G 5/391 Resolution modifying circuits, e.g. variable screen formats

Abstract

A method of displaying an image includes receiving image data for the image; buffering the image data for the image, including creating a frame of the image; defining a first sub-frame and at least a second sub-frame for the frame of the image; and displaying the first sub-frame and the second sub-frame, including synchronizing shifting a displayed image of the second sub-frame with displaying the second sub-frame.

Claims

1. A method of displaying an image, the method comprising:

receiving image data for the image;

buffering the image data for the image, including creating a frame of the image;

defining a first sub-frame and at least a second sub-frame for the frame of the image; and

displaying the first sub-frame and the second sub-frame, including synchronizing shifting a displayed image of the second sub-frame with displaying the second sub-frame,

wherein displaying the first sub-frame and the second sub-frame includes modulating light with a light modulator and producing a first displayed image portion with the first sub-frame and a second displayed image portion with the second sub-frame,

wherein displaying the first sub-frame and the second sub-frame further includes projecting the first displayed image portion and the second displayed image portion with projection optics, and

wherein shifting the displayed image of the second sub-frame includes positioning an optical element in an optical path at least one of before and after the projection optics and moving the optical element between a first position and at least a second position.

2. A method of displaying an image, the method comprising:

receiving image data for the image;

buffering the image data for the image, including creating a frame of the image;

defining a first sub-frame and at least a second sub-frame for the frame of the image; and

displaying the first sub-frame and the second sub-frame, including synchronizing shifting a displayed image of the second sub-frame with displaying the second sub-frame,

wherein displaying the first sub-frame and the second sub-frame includes modulating light with a light modulator and producing a first displayed image portion with the first sub-frame and a second displayed image portion with the second sub-frame,

wherein displaying the first sub-frame and the second sub-frame further includes projecting the first displayed image portion and the second displayed image portion with projection optics, and

wherein shifting the displayed image of the second sub-frame includes positioning an optical element between a first projection element of the projection optics and a second projection element of the projection optics and moving the optical element between a first position and at least a second position.

3. A method of displaying an image, the method comprising:

receiving image data for the image;

buffering the image data for the image, including creating a frame of the image;

defining a first sub-frame and at least a second sub-frame for the frame of the image; and

displaying the first sub-frame and the second sub-frame, including synchronizing shifting a displayed image of the second sub-frame with displaying the second sub-frame,

wherein displaying the first sub-frame and the second sub-frame includes modulating light with a light modulator and producing a first displayed image portion with the first sub-frame and a second displayed image portion with the second sub-frame,

wherein displaying the first sub-frame and the second sub-frame further includes projecting the first displayed image portion and the second displayed image portion with projection optics, and

wherein shifting the displayed image of the second sub-frame includes moving a projection element of the projection optics between a first position and at least a second position.

4. A system for displaying an image, the system comprising:

a buffer adapted to receive image data for the image and buffer the image data to create a frame of the image;

an image processing unit adapted to define a first sub-frame and at least a second sub-frame for the frame of the image; and

a display device adapted to display the first sub-frame and the second sub-frame and shift a displayed image of the second sub-frame, wherein the display device includes an image shifter adapted to shift the displayed image of the second sub-frame, wherein the shift of the displayed image of the second sub-frame is synchronized with display of the second sub-frame,

wherein the display device includes a light modulator adapted to modulate light and produce a first displayed image portion with the first sub-frame and a second displayed image portion with the second sub-frame, and projection optics adapted to project the first displayed image portion and the second displayed image portion,

wherein the image shifter includes an optical element positioned in an optical path at least one of before and after the projection optics, wherein the optical element is adapted to move between a first position and at least a second position to shift the displayed image of the second sub-frame.

5. A system for displaying an image, the system comprising:

a buffer adapted to receive image data for the image and buffer the image data to create a frame of the image;

an image processing unit adapted to define a first sub-frame and at least a second sub-frame for the frame of the image; and

a display device adapted to display the first sub-frame and the second sub-frame and shift a displayed image of the second sub-frame, wherein the display device includes an image shifter adapted to shift the displayed image of the second sub-frame, wherein the shift of the displayed image of the second sub-frame is synchronized with display of the second sub-frame,

wherein the display device includes a light modulator adapted to modulate light and produce a first displayed image portion with the first sub-frame and a second displayed image portion with the second sub-frame, and projection optics adapted to project the first displayed image portion and the second displayed image portion,

wherein the projection optics include a first projection element and a second projection element, wherein the image shifter includes an optical element positioned between the first projection element and the second projection element, and wherein the optical element is adapted to move between a first position and at least a second position to shift the displayed image of the second sub-frame.

6. A system for displaying an image, the system comprising:

a buffer adapted to receive image data for the image and buffer the image data to create a frame of the image;

an image processing unit adapted to define a first sub-frame and at least a second sub-frame for the frame of the image; and

a display device adapted to display the first sub-frame and the second sub-frame and shift a displayed image of the second sub-frame, wherein the display device includes an image shifter adapted to shift the displayed image of the second sub-frame, wherein the shift of the displayed image of the second sub-frame is synchronized with display of the second sub-frame,

wherein the display device includes a light modulator adapted to modulate light and produce a first displayed image portion with the first sub-frame and a second displayed image portion with the second sub-frame, and projection optics adapted to project the first displayed image portion and the second displayed image portion,

wherein the image shifter includes a projection element of the projection optics,

wherein the optical element is adapted to move between a first position and at least a second position to shift the displayed image of the second sub-frame.

7. A method of displaying an image with a display device, the method comprising:

receiving image data for the image;

buffering the image data for the image, including creating a frame of the image;

processing the image data for the image, including matching a resolution of the image data to a resolution of the display device, and defining a first sub-frame and at least a second sub-frame for the frame of the image; and

displaying the first sub-frame and the second sub-frame with the display device, including synchronizing shifting a displayed image of the second sub-frame with displaying the second sub-frame;

wherein displaying the first sub-frame and the second sub-frame includes modulating light with a light modulator and producing a first displayed image portion with the first sub-frame and a second displayed image portion with the second sub-frame; and

wherein shifting the displayed image of the second sub-frame includes positioning an optical element in an optical path at least one of before and after the projection optics and moving the optical element between a first position and at least a second position.

8. A method of displaying an image with a display device, the method comprising:

receiving image data for the image;

buffering the image data for the image, including creating a frame of the image;

processing the image data for the image, including matching a resolution of the image data to a resolution of the display device, and defining a first sub-frame and at least a second sub-frame for the frame of the image; and

displaying the first sub-frame and the second sub-frame with the display device, including synchronizing shifting a displayed image of the second sub-frame with displaying the second sub-frame;

wherein displaying the first sub-frame and the second sub-frame includes modulating light with a light modulator and producing a first displayed image portion with the first sub-frame and a second displayed image portion with the second sub-frame; and

wherein shifting the displayed image of the second sub-frame includes positioning an optical element between a first projection element of the projection optics and a second projection element of the projection optics and moving the optical element between a first position and at least a second position.

9. A method of displaying an image with a display device, the method comprising:

receiving image data for the image;

buffering the image data for the image, including creating a frame of the image;

processing the image data for the image, including matching a resolution of the image data to a resolution of the display device, and defining a first sub-frame and at least a second sub-frame for the frame of the image; and

displaying the first sub-frame and the second sub-frame with the display device, including synchronizing shifting a displayed image of the second sub-frame with displaying the second sub-frame;

wherein displaying the first sub-frame and the second sub-frame includes modulating light with a light modulator and producing a first displayed image portion with the first sub-frame and a second displayed image portion with the second sub-frame; and

wherein shifting the displayed image of the second sub-frame includes moving a projection element of the projection optics between a first position and at least a second position.

10. A system for displaying an image, the system comprising:

a buffer adapted to receive image data for the image and buffer the image data to create a frame of the image;

an image processing unit adapted to define a first sub-frame and at least a second sub-frame for the frame of the image; and

a display device adapted to display the first sub-frame and the second sub-frame and shift a displayed image of the second sub-frame;

wherein the image processing unit is adapted to adjust a resolution of the image data to a resolution of the display device, and wherein the shift of the displayed image of the second sub-frame is synchronized with the display of the second sub-frame; and

wherein the display device includes,

an image shifter adapted to shift the displayed image of the second sub-frame;

a light modulator adapted to modulate light and produce a first displayed image portion with the first sub-frame and a second displayed image portion with the second sub-frame; and

projection optics adapted to project the first displayed image portion and the second displayed image portion; and

wherein the image shifter includes an optical element positioned in an optical path at least one of before and after the projection optics, wherein the optical element is adapted to move between a first position and at least a second position to shift the displayed image of the second sub-frame.

11. A system for displaying an image, the system comprising:

a buffer adapted to receive image data for the image and buffer the image data to create a frame of the image;

an image processing unit adapted to define a first sub-frame and at least a second sub-frame for the frame of the image; and

a display device adapted to display the first sub-frame and the second sub-frame and shift a displayed image of the second sub-frame;

wherein the image processing unit is adapted to adjust a resolution of the image data to a resolution of the display device, and wherein the shift of the displayed image of the second sub-frame is synchronized with the display of the second sub-frame; and

wherein the display device includes,

an image shifter adapted to shift the displayed image of the second sub-frame;

a light modulator adapted to modulate light and produce a first displayed image portion with the first sub-frame and a second displayed image portion with the second sub-frame; and

projection optics adapted to project the first displayed image portion and the second displayed image portion; and

wherein the projection optics include a first projection element and a second projection element, wherein the image shifter includes an optical element positioned between the first projection element and the second projection element, and wherein the optical element is adapted to move between a first position and at least a second position to shift the displayed image of the second sub-frame.

12. A system for displaying an image, the system comprising:

a buffer adapted to receive image data for the image and buffer the image data to create a frame of the image;

an image processing unit adapted to define a first sub-frame and at least a second sub-frame for the frame of the image; and

a display device adapted to display the first sub-frame and the second sub-frame and shift a displayed image of the second sub-frame;

wherein the image processing unit is adapted to adjust a resolution of the image data to a resolution of the display device, and wherein the shift of the displayed image of the second sub-frame is synchronized with the display of the second sub-frame; and

wherein the display device includes,

an image shifter adapted to shift the displayed image of the second sub-frame;

a light modulator adapted to modulate light and produce a first displayed image portion with the first sub-frame and a second displayed image portion with the second sub-frame; and

projection optics adapted to project the first displayed image portion and the second displayed image portion; and

wherein the image shifter includes a projection element of the projection optics,

wherein the optical element is adapted to move between a first position and at least a second position to shift the displayed image of the second sub-frame.