ADAPTIVE LINE TIME TO INCREASE FRAME RATE

• US 20130100099A1
• Filed: 05/31/2012
• Published: 04/25/2013
• Est. Priority Date: 10/21/2011
• Status: Abandoned Application

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: Qualcomm MEMS Technologies Incorporated (Qualcomm, Inc.)
• Inventors: Chuei, Nao S., Todorovich, Mark M., Aflatooni, Koorosh, Shah, Hemang
• Application Number:
  US13/485,708
• Publication Number:
  US 20130100099A1
• Time in Patent Office: Days
• US Class Current: 345/208
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 2340/16 Determination of a pixel data signal depending on the signal applied in the previous frame
• CPC Class Codes: G09G 3/3466 based on interferometric effect

Abstract

This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for determining a line time for writing data to display elements on one or more common lines of an array of display elements. In one aspect, the line time is determined for writing data to a line of display elements based on the received image data to be written to the line of display elements.

Claims

1. An apparatus for driving a display including a plurality of common lines and a plurality of segment lines connected to an array of display elements, the apparatus comprising:

a controller configured to receive, as part of a frame of image data to be written to the array of display elements, image data for one or more common lines of the array, wherein the controller is configured to determine a line time for writing at least some of the image data to display elements along at least a first one of the one or more common lines of the array, wherein the determining is based at least in part on one or both of

the write actuation state to be produced in the display elements along the at least a first one of the one or more common lines as defined by the at least some of the image data, and

characteristics of at least some of the segment line transitions that will occur to place the segment lines in a series of states operable to write the image data to the one or more common lines; and

a common driver and a segment driver configured to drive the array of display elements to write the at least some of the image data to display elements along the at least one of the one or more common lines with the determined line time.

2. The apparatus of claim 1, further comprising a memory configured to store image data for at least one previously written common line, and wherein the controller is configured to compare the image data with the image data for the at least one previously written common line, and wherein the controller is configured to determine the characteristics of segment line transitions that will occur to place the segment lines in a state operable to write the image data to the display elements along the at least one of the one or more common lines based at least in part on the image data comparison.

3. The apparatus of claim 1, further comprising a memory configured to store image data corresponding to an immediately subsequent line of display elements, and wherein the controller is configured to compare the image data for the at least one of the one or more common lines with the image data corresponding to the immediately subsequent line of display elements to at least partially determine the line time.

4. The apparatus of claim 2, wherein the controller is configured to compare the polarity of a waveform to be used when writing the image data to the polarity of the waveform used to write the at least one previously written common line, and wherein the controller is configured to at least partially determine the characteristics of segment line transitions that will occur to place the segment lines in a state operable to write the image data to the display elements along the at least one of the one or more common lines based at least in part on the polarity comparison.

5. The apparatus of claim 1, wherein the line time includes a front porch duration, a back porch duration, and a write pulse duration.

6. The apparatus of claim 5, wherein the controller is configured to determine at least one of the front porch duration and the back porch duration based at least in part on the characteristics of at least some of the segment line transitions.

7. The apparatus of claim 5, wherein the controller is configured to determine the write pulse duration based at least in part on a number display elements on the at least a first one of the one or more common lines that are to be transitioned from an un-actuated state to an actuated state when writing the received image data.

8. The apparatus of claim 7, wherein the common driver is configured to apply a clearing pulse to the at least a first one of the one or more common lines to transition the display elements along the at least a first one of the one or more common lines to the un-actuated state.

9. The apparatus of claim 1, wherein the controller is configured to determine the line time based at least in part on the color of the display elements.

10. The apparatus of claim 1, wherein the controller is configured to determine the line time based at least in part on a segment line transition edge sharpness.

11. The apparatus of claim 1, wherein the controller is configured to determine a first line time for writing data to display elements along a first common line, and wherein the segment driver and common driver are configured to write data to display elements along the first common line using the first line time, and wherein the controller is configured to determine a second line time that is different than the first line time for writing data to display elements along a second common line, and wherein the segment driver and common driver are configured to write data to display elements along the second common line using the second line time.

12. The apparatus of claim 1, further comprising:

a processor that is configured to communicate with the display, the processor being configured to process image data; and

a memory device that is configured to communicate with the processor.

13. The apparatus as recited in claim 12, further comprising:

an image source module configured to send the image data to the processor.

14. The apparatus as recited in claim 13, wherein the image source module includes at least one of a receiver, transceiver, and transmitter.

15. The apparatus as recited in claim 12, further comprising:

an input device configured to receive input data and to communicate the input data to the processor.

16. The apparatus of claim 1, wherein the controller is configured to determine the line time for writing current image data to display elements along the one or more common lines of the array based on the write actuation state of the display elements along the one or more common lines.

17. The apparatus of claim 1, wherein the controller is configured to determine the line time for writing current image data to display elements along the one or more common lines of the array based on characteristics of segment line transitions for writing the current image data to the display elements along the one or more common lines.

18. The apparatus of claim 1, wherein the controller is configured to determine the line time for writing current image data to display elements along the one or more common lines of the array based on the write actuation state of the display elements along the one or more common lines and based on characteristics of segment line transitions for writing the current image data to the display elements along the one or more common lines.

19. A method for driving a display including a plurality of common lines and a plurality of segment lines connected to an array of display elements, the method comprising:

receiving image data, including image data for one or more common lines;

determining a line time for writing the image data to one or more common lines based at least in part on one or both of

a write actuation state of display elements along one or more common lines, and

characteristics of at least some segment line transitions in writing the image data to the display elements along the one or more common lines; and

writing the image data to display elements along one or more common lines with the determined line time.

20. The method of claim 19, further comprising storing previously received image data, and comparing the received image data with the previously received image data to at least partially determine the line time.

21. The method of claim 19, further comprising storing image data corresponding to an immediately subsequent line of display elements, and comparing the received image data with the image data corresponding to the immediately subsequent line of display elements to determine the line time.

22. The method of claim 19, comprising determining the line time based at least in part on a polarity of a waveform applied to the common line.

23. The method of claim 19, wherein the line time includes a front porch duration, a back porch duration, and a write pulse duration, and wherein determining a line time includes determining at least one of the front porch duration and the back porch duration based at least in part on characteristics of segment line transitions produced when writing the image data to one or more common lines.

24. The method of claim 19, wherein the line time includes a front porch duration, a back porch duration, and a write pulse duration, and wherein determining a line time includes determining the write pulse duration based on a number of display elements along a common line that are to be transitioned from an un-actuated state to an actuated state when writing the received image data.

25. The method of claim 19, wherein determining the line time includes determining the line time for writing current image data to display elements along the one or more common lines of the array based on the write actuation state of the display elements along the one or more common lines.

26. The method of claim 19, wherein determining the line time includes determining the line time for writing current image data to display elements along the one or more common lines of the array based on characteristics of segment line transitions for writing the current image data to the display elements along the one or more common lines.

27. The method of claim 19, wherein determining the line time includes determining the line time for writing current image data to display elements along the one or more common lines of the array based on the write actuation state of the display elements along the one or more common lines and based on characteristics of segment line transitions for writing the current image data to the display elements along the one or more common lines.

28. An apparatus for driving a display including a plurality of common lines and a plurality of segment lines connected to an array of display elements, the apparatus comprising:

means for receiving image data, including image data for one or more common lines;

means for determining a line time for writing the image data to one or more common lines based at least in part on one or both of

a write actuation state of display elements along one or more common lines, and

characteristics of at least some segment line transitions in writing the image data to the display elements along the one or more common lines; and

means for writing the image data to display elements along one or more common lines with the determined line time.

29. The apparatus of claim 28, wherein the means for receiving image data includes a processor, the means for determining a line time includes a drive controller, and the means for writing the image data includes an array driver including a segment driver and a common driver.

30. The apparatus of claim 28, further comprising means for storing previously received image data, and wherein the means for determining a line time includes means for comparing the received image data with the previously received image data to determine the line time.

31. The apparatus of claim 28, further comprising means for storing image data corresponding to an immediately subsequent line of display elements, and means for comparing the received image data with the image data corresponding to the immediately subsequent line of display elements to determine the line time.

32. The apparatus of claim 28, wherein the line time includes a front porch duration, a back porch duration, and a write pulse duration, and wherein the means for determining a line time includes means for determining at least one of the front porch duration and the back porch duration based at least in part on characteristics of segment line transitions produced when writing the image data to one or more common lines.

33. The apparatus of claim 28, wherein the line time includes a front porch duration, a back porch duration, and a write pulse duration, and wherein the means for determining a line time includes means for determining the write pulse duration based on a number display elements along one or more common lines that are to be transitioned from an un-actuated state to an actuated state when writing the received image data.

34. A computer program product for processing data for a program configured to drive a display including a plurality of common lines and a plurality of segment lines connected to an array of display elements, the computer program product comprising:

a non-transitory computer-readable medium having stored thereon code for causing processing circuitry to;

receive image data including image data for one or more common lines;

determine a line time for the one or more common lines based at least in part on one or both of a write actuation state of display elements along one or more common lines and characteristics of at least some segment line transitions in writing the image data to the display elements along the one or more common lines; and

write the image data to display elements along one or more common lines with the determined line time.

35. The computer program product of claim 34, further comprising code for causing processing circuitry to store previously received image data, and code for causing processing circuitry to compare the received image data with the previously received image data to at least partially determine the line time.

36. The computer program product of claim 34, further comprising code for causing processing circuitry to store image data corresponding to an immediately subsequent line of display elements, and code for causing processing circuitry to compare the received image data with the image data corresponding to the immediately subsequent line of display elements to at least partially determine the line time.

37. The computer program product of claim 34, further comprising code for causing processing circuitry to at least partially determine the line time based on a polarity of a waveform applied to the common line.

38. The computer program product of claim 34, wherein the line time includes a front porch duration, a back porch duration, and a write pulse duration, the computer program product further comprising code for causing processing circuitry to determine at least one of the front porch duration and the back porch duration based at least in part on characteristics of at least some segment line transitions produced when writing the image data to one or more common lines.

39. The computer program product of claim 34, wherein the line time includes a front porch duration, a back porch duration, and a write pulse duration, the computer program product further comprising code for causing processing circuitry to determine the write pulse duration based at least in part on a number display elements along a common line that are to be transitioned from an un-actuated state to an actuated state when writing the received image data.