Generating and displaying spatially offset sub-frames

• US 7,474,319 B2
• Filed: 10/20/2004
• Issued: 01/06/2009
• Est. Priority Date: 10/20/2004
• 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: McClellan, Paul J., Allen, William J., Collins, David C.
• Primary Examiner(s): Nguyen; Kevin M
• Application Number:
  US10/969,747
• Publication Number:
  US 20060082561A1
• Time in Patent Office: 1,539 Days
• Field of Search: 345690-693, 345/87, 345/98, 345/100, 345/204, 345/694, 345/696
• US Class Current: 345/694
• CPC Class Codes: G09G 2300/0439 Pixel structures
• CPC Class Codes: G09G 2300/0814 used for selection purposes, e.g. logical AND for partial update
• CPC Class Codes: G09G 2310/0267 Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
• 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

Abstract

A display device for displaying an image using a first sub-frame and a second sub-frame is provided. The display device comprises an array having a first plurality of pixels and a second plurality of pixels offset from but overlapping the first plurality of pixels and a control unit. The control unit is configured to cause the array to display the first sub-frame using the first plurality of pixels, and the control unit is configured to cause the array to display the second sub-frame using the second plurality of pixels.

Claims

1. A display device for displaying an image using a first sub-frame and a second sub-frame, the display device comprising:

an array having a set of pixels; and

a control unit configured to cause a first subset of the set of pixels to display the first sub-frame during a time period and a second subset of the set of pixels to display the second sub-frame subsequent to the time period;

wherein each of the first and the second subsets of the set of pixels includes a third subset of the set of pixels, wherein the first subset of the set of pixels includes a fourth subset of the set of pixels, and wherein the second subset of the set of pixels does not include the fourth subset of the set of pixels.

2. The display device of claim 1 wherein the first subset of the set of pixels comprises a first plurality of groups of four adjacent pixels, and wherein the second subset of the set of pixels comprises a second plurality of groups of four adjacent pixels.

3. The display device of claim 2 wherein each of the second plurality of groups of four adjacent pixels is offset from a respective one the first plurality of groups of four adjacent pixels.

4. The display device of claim 3 wherein each of the second plurality of groups of four adjacent pixels is diagonally offset from a respective one the first plurality of groups of four adjacent pixels by a distance of one pixel.

5. The display device of claim 1 wherein the control unit is configured to cause the array to display the first sub-frame by providing a first value of a select signal to the array during the time period, and wherein the control unit is configured to cause the array to display the second sub-frame by providing a second value of a select signal to the array subsequent to the time period.

6. The display device of claim 5 wherein the array comprises a plurality of selector circuits configured to receive the select signal, wherein each of the plurality of selector circuits is configured to provide a first signal to the first subset of the set of pixels in response to receiving the first value of the select signal to display the first sub-frame, and wherein each of the plurality of selector circuits is configured to provide a second signal to the second subset of the set of pixels in response to receiving the second value of the select signal to display the second sub-frame.

7. The display device of claim 1 wherein the first subset of the set of pixels comprises a first plurality of rows, and wherein the second subset of the set of pixels comprises a second plurality of rows that includes a subset of the first plurality of rows.

8. The display device of claim 1 wherein the first subset of the set pixels comprises a first plurality of columns, and wherein the second subset of the set pixels comprises a second plurality of columns that includes a subset of the first plurality of columns.

9. The display device of claim 1 wherein the first and second subsets of the set pixels comprise a diagonal pixel array.

10. The display device of claim 1 wherein the control unit is configured to cause the array to display a first color plane of the first sub-frame using the first subset of the set of pixels and the first color plane of the second sub-frame using the second subset of the set of pixels, wherein the control unit is configured to cause a fifth subset of the set of pixels to display a second color plane of the first sub-frame during the time period and a sixth subset of the set of pixels to display the second color plane of the second sub-frame subsequent to the time period;

wherein each of the fifth and the sixth subsets of the set of pixels includes a seventh subset of the set of pixels, wherein the fifth subset of the set of pixels includes an eighth subset of the set of pixels, and wherein the sixth subset of the set of pixels does not include the eighth subset of the set of pixels.

11. The display device of claim 10 wherein the first subset of the set of pixels is aligned with the fifth subset of the set of pixels, and wherein the second subset of the set of pixels is aligned with the sixth subset of the set of pixels.

12. The display device of claim 10 wherein the first subset of the set of pixels is aligned with the sixth subset of the set of pixels, and wherein the second subset of the set of pixels is aligned with the fifth subset of the set of pixels.

13. A method of displaying an image in an array using a first sub-frame and a second sub-frame, the method comprising:

displaying the first sub-frame in first and second subsets of a set of pixels of the array at a first time; and

displaying the second sub-frame in at least the second subset of the set of pixels of the array but not the first subset of the set of pixels at a second time that is subsequent to the first time.

14. The method of claim 13 further comprising:

generating a first signal configured to select the first and the second subsets of the set of pixels at the first time; and

generating a second signal configured to select the second subset of the set of pixels but not the first subset of the set of pixels at the second time.

15. The method of claim 13 further comprising:

providing a first plurality of sub-frame pixel values from the first sub-frame to the first and the second subsets of the set pixels at the first time; and

providing a second plurality of sub-frame pixel values from the second sub-frame to the second subset of the set of pixels but not the first subset of the set of pixels at the second time.

16. The method of claim 13 wherein the first and the second subsets of the set of pixels comprise a first plurality of rows, and wherein the second subset of the set of pixels comprise a second plurality of rows that overlap the first plurality of rows.

17. The method of claim 13 wherein the first and the second subsets of the set of pixels comprises a first plurality of columns, and wherein the second subset of the set of pixels comprises a second plurality of columns that overlap the first plurality of columns.

18. The method of claim 13 wherein the first and the second subsets of the set of pixels comprise a diagonal pixel array.

19. The method of claim 13 wherein the first and the second subsets of the set of pixels comprises a first plurality of groups of four adjacent pixels, and wherein the second subset of the set of pixels comprises a second plurality of groups of four adjacent pixels.

20. The method of claim 19 wherein the second plurality of groups of four adjacent pixels is offset from the first plurality of groups of four adjacent pixels.

21. The method of claim 20 wherein the second plurality of groups of four adjacent pixels is diagonally offset from the first plurality of groups of four adjacent pixels by a distance of one pixel.

22. An array comprising:

a set of pixels arranged in a set of rows; and

a set of selector circuits;

wherein the set of selector circuits is configured to provide a first set of data select signals to a first subset of the set of rows to cause a first sub-frame to be displayed by the first subset of the set of rows, wherein the set of selector circuits is configured to provide a second set of data select signals to a second subset of the set of rows to cause a second sub-frame to be displayed by the second subset of the set of rows, and wherein the second subset of the set of rows that includes at least one row from the first subset of the set of rows but does not include all of the rows from the first subset of the set of rows.

23. The array of claim 22 wherein the set of selector circuits is configured to provide the first set of data select signals to the first subset of the set of rows in response to receiving a first value of a set select signal, and wherein the set of selector circuits is configured to provide the second set of data select signals to the second subset of the set of rows in response to receiving a second value of a set select signal.

24. The array of claim 23 wherein the set of pixels is arranged in a set of columns configured to receive a set of column data signals.

25. The array of claim 24 wherein the first set of data select signals and the set of column data signals are configured to cause the first sub-frame to be displayed by the first subset of the set of rows and a first subset of the set of columns, wherein the second set of data select signals and the set of column data signals are configured to cause the second sub-frame to be displayed by the second subset of the set of rows and a second subset of the set of columns, and wherein the second subset of the set of columns that includes at least one column from the first subset of the set of columns but does not include all of the columns from the first subset of the set of columns.

26. A system for displaying an image in an array having a set of pixels using a first sub-frame having a first set of sub-frame pixel values and a second sub-frame having a second set of sub-frame pixel values, the system comprising:

means for receiving an address, the first set of sub-frame pixel values, the second set of sub-frame pixel values, and a select signal;

means for providing the first set of sub-frame pixel values to first and second subsets of the set of pixels for display using the address in response to a value of the select signal being associated with the first sub-frame; and

means for providing the second set of sub-frame pixel values to the second subset of the set of pixels but not the first subset of the set of pixels for display using the address in response to the value of the select signal being associated with the second sub-frame.

27. The system of claim 26 further comprising:

means for generating the select signal.

28. The system of claim 26 wherein the first and the second subsets of the set of pixels comprises a first set of groups of four adjacent pixels from the set of pixels, and wherein the second subset of the set of pixels comprises a second set of groups of four adjacent pixels from the set of pixels.

29. The system of claim 28 wherein each of the second set of groups of four adjacent pixels is offset from each of the first set of groups of four adjacent pixels.

30. The system of claim 28 wherein each of the second set of groups of four adjacent pixels is diagonally offset from one of the first set of groups of four adjacent pixels by one pixel.