Image display system and method including optical scaling

• US 7,557,819 B2
• Filed: 07/28/2005
• Issued: 07/07/2009
• Est. Priority Date: 03/11/2003
• Status: Expired due to Fees

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Williams, David A, Cole, James R, Pate, Michael A
• Primary Examiner(s): Abdulselam; Abbas I
• Application Number:
  US11/192,641
• Publication Number:
  US 20050259122A1
• Time in Patent Office: 1,440 Days
• Field of Search: 345/698, 345/581, 345/629, 348/14.12, 348/445, 348/264, 348/474, 348/556, 382/284, 382/294
• US Class Current: 345/698
• CPC Class Codes: G06T 3/4069 by subpixel displacements
• 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 5/391 Resolution modifying circuits, e.g. variable screen formats
• CPC Class Codes: H04N 7/0122 the input and the output signals having different aspect ratios

Abstract

A method of displaying an image having a first aspect ratio with a display device having a second aspect ratio includes receiving image data for the image, buffering the image data and creating a frame of the image at the first aspect ratio, defining a first sub-frame and a second sub-frame for the frame of the image at the second aspect ratio, including spatially offsetting the second sub-frame from the first sub-frame in one direction, and alternating between displaying the first sub-frame in a first position and the second sub-frame in a second position spatially offset from the first position with the display device, including optically scaling a displayed image of the first sub-frame and a displayed image of the second sub-frame in the one direction.

Claims

1. A method of displaying an image having a first aspect ratio with a display device having a second aspect ratio, the method comprising:

receiving image data for a frame of the image in the first aspect ratio;

displaying a displayed image for the frame of the image with the display device, including increasing a resolution of the displayed image in one direction; and

optically scaling the displayed image in the one direction to create the second aspect ratio,

wherein receiving the image data includes defining a first sub-frame and a second sub-frame spatially offset from the first sub-frame in the one direction for the frame of the image, and wherein displaying the displayed image includes alternating between displaying the first sub-frame in a first position and the second sub-frame in a second position spatially offset from the first position.

2. The method of claim 1, wherein receiving the image data further includes buffering the image data and creating the frame of the image at the first aspect ratio, and wherein defining the first sub-frame and the second sub-frame for the frame of the image includes defining the first sub-frame and the second sub-frame at the second aspect ratio.

3. The method of claim 1, wherein alternating between displaying the first sub-frame and the second sub-frame includes overlapping pixels of the first sub-frame and pixels of the second sub-frame in the one direction to increase the resolution of the displayed image in the one direction.

4. The method of claim 1, wherein optically scaling the displayed image includes optically scaling the displayed image by a ratio of the first aspect ratio and the second aspect ratio.

5. A system for displaying an image having a first aspect ratio, the system comprising:

an image processing unit adapted to receive a frame of the image; and

a display device having a second aspect ratio and adapted to produce a displayed image for the frame of the image,

wherein the display device is adapted to increase a resolution of the displayed image in one direction and optically scale the displayed image in the one direction,

wherein the image processing unit is adapted to define a first sub-frame and a second sub-frame spatially offset from the first sub-frame in the one direction for the frame of the image, and wherein the display device is adapted to alternately display the first sub-frame in a first position and the second sub-frame in a second position spatially offset from the first position.

6. The system of claim 5, further comprising:

a buffer adapted to receive the image data and buffer the image data to create the frame of the image at the first aspect ratio, and

wherein the image processing unit is adapted to define the first sub-frame and the second sub-frame at the second aspect ratio.

7. The system of claim 5, wherein the display device is adapted to overlap pixels of the first sub-frame and pixels of the second sub-frame in the one direction to increase the resolution of the displayed image in the one direction.

8. The system of claim 5, wherein the display device is adapted to optically scale the displayed image by a ratio of the first aspect ratio and the second aspect ratio.