SYSTEM AND METHOD FOR CHOOSING DISPLAY MODES

• US 20110285683A1
• Filed: 05/18/2011
• Published: 11/24/2011
• Est. Priority Date: 05/18/2010
• Status: Abandoned Application

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: Qualcomm MEMS Technologies Incorporated (Qualcomm, Inc.)
• Inventors: Cummings, William J., Lewis, Alan G., Todorovich, Mark M.
• Application Number:
  US13/110,747
• Publication Number:
  US 20110285683A1
• Time in Patent Office: Days
• US Class Current: 345/208
• CPC Class Codes: G09G 2300/06 Passive matrix structure, i.e. with direct application of both column and row voltages to the light emitting or modulating elements, other than LCD or OLED
• CPC Class Codes: G09G 2310/0205 Simultaneous scanning of several lines in flat panels
• CPC Class Codes: G09G 2310/0254 Control of polarity reversal in general, other than for liquid crystal displays
• CPC Class Codes: G09G 2310/06 Details of flat display driving waveforms
• CPC Class Codes: G09G 2320/103 Detection of image changes, e.g. determination of an index representative of the image change
• CPC Class Codes: G09G 2340/0435 Change or adaptation of the frame rate of the video stream
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/3466 based on interferometric effect

Abstract

This disclosure provides apparatus, systems, and methods for updating display devices. In one aspect, a line time addressing mode may be used to update the display by changing the amount of time that a common line has to address a display element. A shorter line time results in a higher frame rate, but may result in increased display errors. Therefore, an appropriate line time addressing mode may be selected based on the update rate of images to be displayed.

Claims

1. A display comprising:

a display element and a processor;

wherein the processor element is configured to;

obtain images to be displayed;

select a line time addressing mode based at least in part on an update rate of images to be displayed, wherein the line time addressing mode determines the amount of time that each display element is addressed by a common line; and

,

update the display according to the line time addressing mode.

2. The apparatus of claim 1, further comprising a memory that is configured to communicate with the processor.

3. The apparatus as recited in claim 1, further comprising:

a driver configured to send at least one signal to the display.

4. The apparatus as recited in claim 3, further comprising:

a controller configured to send at least a portion of the image data to the driver circuit.

5. The apparatus as recited in claim 1, further comprising:

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

6. The apparatus as recited in claim 5, wherein the image source module includes at least one of a receiver, transceiver, and transmitter.

7. The apparatus as recited in claim 1, further comprising:

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

8. The apparatus as recited in claim 1, wherein updating the display according to the line time addressing mode comprises:

applying a waveform across a common line corresponding to display elements, the waveform having a front porch, write time, and back porch; and

,

wherein the front porch is approximately 12 microseconds, the write time is approximately 70 microseconds, and the back porch is approximately 47 microseconds.

9. The apparatus as recited in claim 8, wherein the line time addressing mode corresponds to the display having a frame rate of approximately 6.7 Hz.

10. The apparatus as recited in claim 1, wherein updating the display according to the line time addressing mode includes:

applying a waveform across a common line corresponding to display elements, the waveform having a front porch, write time, and back porch; and

,

wherein the front porch is approximately 8 microseconds, the write time is approximately 40 microseconds, and the back porch is approximately 8 microseconds.

11. The apparatus as recited in claim 10, wherein the display is updated at a frame rate of about 15 Hz.

12. The apparatus as recited in claim 1, wherein selecting a line time addressing mode based at least in part on an update rate of images to be displayed includes:

determining whether the images to be displayed are different by comparing a first image to be displayed to at least a second image to be displayed.

13. The apparatus as recited in claim 12, wherein the comparing includes comparing CRC values.

14. The apparatus as recited in claim 1, wherein the display comprises an IMOD.

15. A method of updating a display having a frame update rate and including display elements corresponding to common lines, the method comprising:

obtaining images to be displayed;

selecting a line time addressing mode based at least in part on an update rate of images to be displayed, wherein the line time addressing mode determines the amount of time that each display element is addressed by a common line; and

,

updating the display according to the line time addressing mode.

16. The method of claim 15, wherein selecting a line time addressing mode includes selecting a line time corresponding to a relatively low display element error rate.

17. The method of claim 16, wherein the data to be displayed includes still images.

18. The method of claim 16, wherein updating the display according to the line time addressing mode comprises:

applying a waveform across a common line corresponding to display elements, the waveform having a front porch, write time, and back porch; and

wherein the front porch is approximately 12 microseconds, the write time is approximately 70 microseconds, and the back porch is approximately 47 microseconds.

19. The method of claim 18, wherein the line time addressing mode corresponds to the display having a frame rate of about 6.7 Hz.

20. The method of claim 15, wherein selecting a line time addressing mode includes selecting a line time corresponding to a relatively high display element error rate.

21. The method of claim 20, wherein the data to be displayed includes moving images.

22. The method of claim 20, wherein updating the display according to the line time addressing mode includes:

applying a waveform across a common line corresponding to display elements, the waveform having a front porch, write time, and back porch; and

wherein the front porch is approximately 8 microseconds, the write time is approximately 40 microseconds, and the back porch is approximately 8 microseconds.

23. The method of claim 22, wherein the display is updated at a frame rate of about 15 Hz.

24. The method of claim 20, wherein the waveform is simultaneously applied across at least two common lines corresponding to display elements.

25. The method of claim 24, wherein the display is updated at a frame rate of about 30 Hz.

26. The method of claim 15, wherein updating the display according to the line time addressing mode includes:

writing a first frame of an image using a line time corresponding to a relatively high display element error rate; and

writing a second frame of the same image using a line time corresponding to a relatively low display element error rate.

27. The method of claim 26, wherein the data to be displayed is a slideshow.

28. The method of claim 26, wherein the second frame write occurs after detection of a stable image in the data to be displayed.

29. The method of claim 15, wherein selecting a line time addressing mode is based in part on power consumption.

30. The method of claim 15, wherein the display comprises an IMOD.

31. The method of claim 15, wherein selecting a line time addressing mode based at least in part on an update rate of images to be displayed includes:

determining whether the images to be displayed are different by comparing a first image to be displayed to at least a second image to be displayed.

32. The method of claim 31, wherein the comparing includes comparing CRC values.

33. A system for driving a display having a frame update rate and including display elements corresponding to common lines, the system comprising:

means for obtaining images to be displayed;

means for selecting a line time addressing mode based at least in part on an update rate of images to be displayed, wherein the line time addressing mode determines the amount of time that each display element is addressed by a common line; and

,

means for updating the display according to the line time addressing mode.

34. The system of claim 33, wherein the means for obtaining data to be displayed comprises an input device.

35. The system of claim 33, wherein the means for selecting a line time addressing mode based at least in part on the update rate of images to be displayed comprises a processor.

36. The system of claim 33, wherein the means for updating the display according to the line time addressing mode comprises a common driver.

37. The system of claim 33, wherein the display comprises an IMOD.

38. A computer program product for processing data for a program configured to drive a display having a frame update rate and including a display elements corresponding to common lines, the computer program product comprising:

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

obtain images to be displayed;

select a line time addressing mode based at least in part on an update rate of images to be displayed, wherein the line time addressing mode determines the amount of time that each display element is addressed by a common line; and

,

update the display according to the line time addressing mode.

39. The computer program product of claim 38, wherein the display comprises an IMOD.