Pixel circuits for AMOLED displays
First Claim
1. A method of determining characteristics of at least one circuit element of at least one selected pixel in an array of pixels in a display in which each pixel includes a drive transistor for supplying current to an optoelectronic device of the pixel, the method comprising:
- controlling a biasing of a selected pixel of the at least one selected pixel including a biasing over a monitor line coupled to the selected pixel;
controlling a biasing of a first drive transistor of a first pixel other than the selected pixel such that a first optoelectronic device of said first pixel is biased so that the first optoelectronic device is turned off, the first pixel sharing the monitor line with the selected pixel; and
measuring at least one characteristic of the at least one circuit element of said selected pixel with use of said monitor line.
2 Assignments
0 Petitions
Accused Products
Abstract
A system for driving a display that includes a plurality of pixel circuits arranged in an array, each of the pixel circuits including a light emitting device and a driving transistor for conveying a driving current through the light emitting device. Methods of measuring characteristics of circuit elements of pixels sharing a monitor line include the control of biasing to selectively turn off circuit elements or render their response known while measuring other circuit elements of interest.
365 Citations
6 Claims
-
1. A method of determining characteristics of at least one circuit element of at least one selected pixel in an array of pixels in a display in which each pixel includes a drive transistor for supplying current to an optoelectronic device of the pixel, the method comprising:
-
controlling a biasing of a selected pixel of the at least one selected pixel including a biasing over a monitor line coupled to the selected pixel; controlling a biasing of a first drive transistor of a first pixel other than the selected pixel such that a first optoelectronic device of said first pixel is biased so that the first optoelectronic device is turned off, the first pixel sharing the monitor line with the selected pixel; and measuring at least one characteristic of the at least one circuit element of said selected pixel with use of said monitor line. - View Dependent Claims (2)
-
-
3. A method of determining the characteristics of circuit elements of at least one selected pixel in an array of pixels in a display in which each pixel includes a drive transistor for supplying current to an optoelectronic device of the pixel, the method comprising:
-
controlling a biasing of a selected pixel of the at least one selected pixel, said biasing including a biasing over a monitor line coupled to the selected pixel; controlling a biasing of a first pixel other than the selected pixel coupled to the monitor line via source and drain terminals of a first source switch such that the first source switch is biased with at least one of a zero voltage and a fixed known voltage across the source and the drain terminal of the first source switch resulting in a corresponding one of a zero current and a fixed known current passing through the first source switch, the first pixel sharing the monitor line with the selected pixel; and measuring at least one characteristic of at least one circuit element of said selected pixel with use of said monitor line. - View Dependent Claims (4, 5, 6)
-
Specification