System and method for data sensing for compensation in an electronic display
AssigneeApple Inc.
InventorsYafei Bi, Mohammad B. Vahid Far
Life of this patent
Estimating the term…
Abstract
Provided herein are systems and methods for measurement and compensation of display panel current leakage and/or display panel noise. A pixel data signal is received at sensing and compensation circuitry. Current leakage compensation circuitry compensates for current leakage of the display panel in the data signal, while panel noise mitigation circuitry configured to reduce panel noise from the data signal. After compensating for the current leakage and reducing the panel noise, the data signal is provided to downstream circuitry for subsequent processing.
Claims20
An electronic device comprising:
- a display panel comprising a plurality of pixels arranged in at least one row and at least one column;
- an analog to digital converter;
- and
- a sensing channel coupled to the at least one column and coupled to the analog to digital converter, the sensing channel configured to:
- produce a signal representative of a current sourced from at least one of the plurality of pixels;
- compensate for current leakage of the display panel in the signal;
- compensate for ground noise of the display panel in the signal;
- and
- after the compensation for the current leakage and the ground noise, provide the signal to the analog to digital converter for subsequent adjustment of the at least one of the plurality of pixels.
A hardware-circuitry implemented method, comprising:
- programming a sensing channel, by programming an integrating capacitor and a line capacitor from a data voltage source;
- integrating leakage current at the sensing channel and the integrating capacitor;
- reprogramming the sensing channel;
- integrating pixel current and the leakage current, using the sensing channel and integrating capacitor;
- and
- isolating the pixel current;
- and
- compensating for panel ground noise.
Display panel compensation circuitry, comprising:
- a sensing channel configured to receive a data signal from at least one pixel of a plurality of pixels of a display panel;
- correlated double sampling circuitry configured to compensate for current leakage of the display panel in the data signal;
- panel noise mitigation circuitry configured to reduce panel noise from the data signal;
- and
- circuitry that provides the data signal to an analog to digital converter after compensating for the current leakage and reducing the panel noise.
Dependencies are inferred from the claim text.