OLED LUMINANCE DEGRADATION COMPENSATION
First Claim
Patent Images
1. A method of compensating for luminance degradation of a pixel, the method comprising:
- determining a capacitance of the pixel; and
correlating the determined capacitance of the pixel to a current correction factor for the pixel.
2 Assignments
0 Petitions
Accused Products
Abstract
A system and method are disclosed for determining a pixel capacitance. The pixel capacitance is correlated to a pixel age to determine a current correction factor used for compensating the pixel drive current to account for luminance degradation of the pixel that results from the pixel aging.
-
Citations
19 Claims
-
1. A method of compensating for luminance degradation of a pixel, the method comprising:
-
determining a capacitance of the pixel; and
correlating the determined capacitance of the pixel to a current correction factor for the pixel. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method of driving a pixel with a current compensated for luminance degradation of the pixel, the method comprising:
-
determining a capacitance of the pixel;
correlating the determined capacitance of the pixel to a current correction factor for the pixel;
compensating a pixel drive current according to the current correction factor; and
driving the pixel with the compensated current. - View Dependent Claims (7)
-
-
8. A read block for use in determining a pixel capacitance of a plurality of pixel circuits, the pixel circuits arranged in an array to form a display, the read block comprising:
a plurality of read block elements, each read block element comprising;
a switch for electrically connecting and disconnecting the read block element to a pixel circuit of the plurality of pixel circuits;
an operational amplifier electrically connected to the switch; and
a read capacitor connected in parallel with the operational amplifier. - View Dependent Claims (9, 10)
-
11. A display for driving an array of a plurality of pixel circuits with a current compensated for luminance degradation, the display comprising:
-
a display panel comprising the array of pixel circuits, the pixel circuits arranged in at least one row and a plurality of columns;
a column driver for driving the pixel circuits with a driving current;
a read block for determining a pixel capacitance of the pixel circuits; and
a control block for controlling the operation of the column driver and the read block, the control block operable to determine a current correction factor from the determined pixel capacitance and adjust the driving current based on the current correction factor. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
-
Specification