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US 2012/0235985 A1Published application
System and method of updating drive scheme voltages
AssigneeQUALCOMM MEMS Technologies, Inc.
InventorsNao S. Chuei, Koorosh Aflatooni, Wilhelmus Johannes Robertus Van Lier, Pramod K. Varma, Ramesh K. Goel, Sameer Venugopal
Life of this patent
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Abstract
This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for calibrating display arrays. In one aspect, a method of calibrating a display array includes determining a particular drive response characteristic and updating a particular drive scheme voltage between updates of image data on the display array.
Claims54
A method of calibrating drive scheme voltages in an array including a plurality of display elements, the method comprising:
- determining, for a first subset of the display elements of the array, a first voltage characterizing a voltage which causes essentially all the display elements in the first subset to actuate from a released state;
- determining, for a second subset of the display elements of the array, a second voltage characterizing a voltage which causes a first display element in the second subset to actuate from a released state but which does not cause a significant number of other display elements in the second subset to actuate from a released state;
- determining, for a third subset of the display elements of the array, a third voltage characterizing a voltage which causes a first display element in the third subset to release from an actuated state but which does not cause a significant number of other display elements in the third subset to release from an actuated state;
- and
- using the first, second, and third voltages to perform maintenance calibrations during use of the array over at least some portion of the life of the array.
2 more elements
A method of calibrating drive scheme voltages in an array including a plurality of display elements, the method comprising:
- determining one or more drive response characteristics of one or more previously characterized subsets of display elements of the array;
- deriving drive scheme voltages using the determined drive response characteristics determined for the one or more previously characterized subsets of display elements;
- and
- determining one or more drive response characteristics of an additional different subset of display elements of the array to characterize the additional different subset of display elements of the array.
1 more element
An apparatus for calibrating drive scheme voltages, the apparatus comprising:
- an array of display elements;
- display element state sensing circuitry;
- and
- driver and processor circuitry configured to:
- determine, for a first subset of the display elements of the array, a first voltage characterizing a voltage which causes essentially all the display elements in the first subset to actuate from a released state;
- determine, for a second subset of the display elements of the array, a second voltage characterizing a voltage which causes a first display element in the second subset to actuate from a released state but which does not cause a significant number of other display elements in the second subset to actuate from a released state;
- determine, for a third subset of the display elements of the array, a third voltage characterizing a voltage which causes a first display element in the third subset to release from an actuated state but which does not cause a significant number of other display elements in the third subset to release from an actuated state;
- and
- use the first, second, and third voltages to perform maintenance calibrations during use of the array.
6 more elements
An apparatus for calibrating drive scheme voltages, the apparatus comprising:
- an array of display elements;
- display element state sensing circuitry;
- and
- driver and processor circuitry configured to:
- determine one or more drive response characteristics of one or more previously characterized subsets of display elements of the array;
- derive drive scheme voltages using the determined drive response characteristics determined for the one or more previously characterized subsets of display elements;
- and
- determine one or more drive response characteristics of an additional different subset of display elements of the array to characterize the additional different subset of display elements of the array.
5 more elements
An apparatus for calibrating drive scheme voltages, the apparatus comprising:
- an array of display elements;
- means for determining, for a first subset of the display elements of the array, a first voltage characterizing a voltage which causes essentially all the display elements in the first subset to actuate from a released state;
- means for determining, for a second subset of the display elements of the array, a second voltage characterizing a voltage which causes a first display element in the second subset to actuate from a released state but which does not cause a significant number of other display elements in the second subset to actuate from a released state;
- means for determining, for a third subset of the display elements of the array, a third voltage characterizing a voltage which causes a first display element in the third subset to release from an actuated state but which does not cause a significant number of other display elements in the third subset to release from an actuated state;
- and
- means for using the first, second, and third voltages to perform maintenance calibrations during use of the array.
3 more elements
An apparatus for calibrating drive scheme voltages, the apparatus comprising:
- an array of display elements;
- means for determining one or more drive response characteristics of one or more previously characterized subsets of display elements of the array;
- means for deriving drive scheme voltages using the determined drive response characteristics determined for the one or more previously characterized subsets of display elements;
- and
- means for determining one or more drive response characteristics of an additional different subset of display elements of the array to characterize the additional different subset of display elements of the array.
2 more elements
A non-transient tangible computer readable media having stored thereon instructions causing a driver circuit to perform the method of:
- determining, for a first subset of the display elements of the array, a first voltage characterizing a voltage which causes essentially all the display elements in the first subset to actuate from a released state;
- determining, for a second subset of the display elements of the array, a second voltage characterizing a voltage which causes a first display element in the second subset to actuate from a released state but which does not cause a significant number of other display elements in the second subset to actuate from a released state;
- determining, for a third subset of the display elements of the array, a third voltage characterizing a voltage which causes a first display element in the third subset to release from an actuated state but which does not cause a significant number of other display elements in the third subset to release from an actuated state;
- and
- using the first, second, and third voltages to perform maintenance calibrations during use of the array.
2 more elements
A non-transient tangible computer readable media having stored thereon instructions causing a driver circuit to perform the method of:
- determining one or more drive response characteristics of one or more previously characterized subsets of display elements of the array;
- deriving drive scheme voltages using the determined drive response characteristics determined for the one or more previously characterized subsets of display elements;
- and
- determining one or more drive response characteristics of an additional different subset of display elements of the array to characterize the additional different subset of display elements of the array.
1 more element
Dependencies are inferred from the claim text.