Image display system and method

• US 7,522,177 B2
• Filed: 09/01/2004
• Issued: 04/21/2009
• Est. Priority Date: 09/01/2004
• 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: Damera-Venkata, Niranjan
• Primary Examiner(s): Nguyen; Kevin M
• Application Number:
  US10/931,923
• Publication Number:
  US 20060044294A1
• Time in Patent Office: 1,693 Days
• Field of Search: 345690-698
• US Class Current: 345/694
• CPC Class Codes: G09G 2310/0224 Details of interlacing
• CPC Class Codes: G09G 2340/0407 Resolution change, inclusive of the use of different resolutions for different screen areas
• 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: H04N 7/01 Conversion of standards , e.g. involving analogue television standards or digital television standards processed at pixel level

Abstract

A method of displaying an image is provided. The method comprises receiving interlaced image data for the image where the interlaced data comprises a first field and a second field, generating a first sub-frame and a second sub-frame for the image using the first field, generating a third sub-frame and a fourth sub-frame for the image using the second field, and alternating between displaying the first sub-frame in a first position at a first time, displaying the second sub-frame in a second position horizontally offset from the first position at a second time that is subsequent to the first time, displaying the third sub-frame in a third position vertically offset from the first position at a third time that is subsequent to the second time, and displaying the fourth sub-frame in a fourth position horizontally and vertically offset from the first position at a fourth time that is subsequent to the second time.

Claims

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

receiving interlaced image data for the image, the interlaced data comprising a first field and a second field;

generating a first sub-frame and a second sub-frame for the image using the first field;

generating a third sub-frame and a fourth sub-frame for the image using the second field; and

alternating between displaying the first sub-frame in a first position at a first time, displaying the second sub-frame in a second position horizontally offset from the first position at a second time that is subsequent to the first time, displaying the third sub-frame in a third position vertically offset from the first position at a third time that is subsequent to the second time, and displaying the fourth sub-frame in a fourth position horizontally and vertically offset from the first position at a fourth time that is subsequent to the second time.

2. The method of claim 1 wherein the interlaced image data includes individual pixels of the image, wherein the first field of the image includes a first plurality of rows of the individual pixels of the image, and wherein the second field of the image includes a second plurality of rows of the individual pixels of the image.

3. The method of claim 2 wherein the first plurality of rows comprises a plurality of odd rows, and wherein the second plurality of rows comprises a plurality of even rows.

4. The method of claim 1 wherein the second position is horizontally offset by one-half pixel from the first position, wherein the third position is vertically offset by one-half pixel from the first position, and wherein the fourth position is horizontally offset by one-half pixel from the first position and vertically offset by one-half pixel from the first position.

5. The method of claim 1 wherein the alternating between displaying the first sub-frame in a first position, displaying the second sub-frame in a second position horizontally offset from the first position, displaying the third sub-frame in a third position vertically offset from the first position, and displaying the fourth sub-frame in a fourth position horizontally and vertically offset from the first position includes overlapping a first plurality of sub-frame pixels of the first sub-frame with a second plurality of sub-frame pixels of the second sub-frame.

6. The method of claim 5 wherein the alternating between displaying the first sub-frame in a first position, displaying the second sub-frame in a second position horizontally offset from the first position, displaying the third sub-frame in a third position vertically offset from the first position, and displaying the fourth sub-frame in a fourth position horizontally and vertically offset from the first position includes overlapping a third plurality of sub-frame pixels of the third sub-frame with a fourth plurality of sub-frame pixels of the fourth sub-frame.

7. The method of claim 6 wherein the alternating between displaying the first sub-frame in a first position, displaying the second sub-frame in a second position horizontally offset from the first position, displaying the third sub-frame in a third position vertically offset from the first position, and displaying the fourth sub-frame in a fourth position horizontally and vertically offset from the first position includes overlapping the first plurality of sub-frame pixels of the first sub-frame with the third plurality of sub-frame pixels of the third sub-frame and overlapping the second plurality of sub-frame pixels of the second sub-frame with the fourth plurality of sub-frame pixels of the fourth sub-frame.

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

a buffer configured to receive interlaced image data for the image, the interlaced image data having a first field and a second field;

an image processing unit configured to generate a first sub-frame and a second sub-frame using the first field and generate a third sub-frame and a fourth sub-frame using the second field; and

a display device configured to alternately display the first sub-frame in a first position at a first time, display the second sub-frame in a second position horizontally offset from the first position at a second time that is subsequent to the first time, display the third sub-frame in a third position vertically offset from the first position at a third time that is subsequent to the second time, and display the fourth sub-frame in a fourth position horizontally and vertically offset from the first position at a fourth time that is subsequent to the second time.

9. The system of claim 8 wherein the image processing unit is configured to generate the first sub-frame and the second sub-frame using the first field without using the second field and generate the third sub-frame and the fourth sub-frame using the second field without using the first field.

10. The system of claim 8 wherein the interlaced image data includes individual pixels of the image, wherein the first field of the image includes a first plurality of rows of the individual pixels of the image, and wherein the second field of the image includes a second plurality of rows of the individual pixels of the image.

11. The system of claim 10 wherein the first plurality of rows comprises a plurality of odd rows, and wherein the second plurality of rows comprises a plurality of even rows.

12. The system of claim 8 wherein the second position is horizontally offset by one-half pixel from the first position, wherein the third position is vertically offset by one-half pixel from the first position, and wherein the fourth position is horizontally offset by one-half pixel from the first position and vertically offset by one-half pixel from the first position.

13. The system of claim 8 wherein the interlaced image data comprises an interlaced image frame having a first number of pixels, and wherein the display device comprises a second number of pixels that is one-fourth of the first number of pixels.

14. The system of claim 8 wherein the image processing unit is configured to generate the first sub-frame, the second sub-frame, the third sub-frame, and the fourth sub-frame without de-interlacing the interlaced image data.

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

means for receiving interlaced image data for the image, the interlaced image data comprising a first field and a second field;

means for generating a first sub-frame and a second sub-frame using the first field;

means for generating a third sub-frame and a fourth sub-frame using the second field; and

means for sequentially displaying the first sub-frame in a first position during a first time period, displaying the second sub-frame in a second position horizontally offset from the first position during the first time period, displaying the third sub-frame in a third position vertically offset from the first position during a second time period that is subsequent to the first time period, and displaying the fourth sub-frame in a fourth position horizontally and vertically offset from the first position during the second time period.

16. A computer-readable medium having computer-executable instructions for performing a method of generating a first sub-frame, a second sub-frame, a third sub-frame, and a fourth sub-frame for display at spatially and temporally offset positions to generate the appearance of an image, comprising:

receiving interlaced image data associated with the image, the interlaced image data comprising a first field and a second field;

generating the first sub-frame for display at a first position using the first field;

generating the second sub-frame for display at a second position horizontally offset from the first position using the first field;

generating the third sub-frame for display at a third position vertically offset from the first position using the second field; and

generating the fourth sub-frame for display at a fourth position horizontally and vertically offset from the first position using the second field.

17. The computer-readable medium of claim 16 wherein the interlaced image data includes individual pixels of the image, wherein the first field of the image includes a first plurality of rows of the individual pixels of the image, and wherein the second field of the image includes a second plurality of rows of the individual pixels of the image.

18. The computer-readable medium of claim 17 wherein the first plurality of rows comprises a plurality of odd rows, and wherein the second plurality of rows comprises a plurality of even rows.

19. The computer-readable medium of claim 16 wherein the second position is horizontally offset by one-half pixel from the first position, wherein the third position is vertically offset by one-half pixel from the first position, and wherein the fourth position is horizontally offset by one-half pixel from the first position and vertically offset by one-half pixel from the first position.