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Samsung patents screen circuit that fixes pixel brightness unevenness

Samsung has filed a patent for a data driving circuit used in display panels. It works by measuring the voltage needed to light up individual pixels and converting that measurement into a digital signal to adjust the power supplied to them.

Why it mattersThis technology helps ensure that every pixel on a screen lights up with the same intensity, preventing subtle color shifts or dark spots in the final image.

In the filing’s own words

A data driving circuit comprises a first analog front-end (AFE) circuit configured to sense a first characteristic voltage from a first channel line connected to a first pixel through a first sensing line while a first channel switch is in a turn-on state, and sense a second characteristic voltage from a second channel line connected to a second pixel through the first sensing line while a second channel switch is in a turn-on state, and an ADC configured to convert an output signal received from the first AFE circuit into a digital compensation signal. The first AFE circuit includes a sampling capacitor storing at least a portion of a sensed characteristic voltage, a sampling switch providing the sensed characteristic voltage to the sampling capacitor, and a first reset switch connected between the first sensing line and a first compensation voltage, and operating based on a first reset signal.

What exactly they claim (claim 1)

1. A data driving circuit comprising: a first analog front-end (AFE) circuit configured to sense a first characteristic voltage from a first channel line connected to a first pixel through a first sensing line while a first channel switch is in a turn-on state, and configured to sense a second characteristic voltage from a second channel line connected to a second pixel through the first sensing line while a second channel switch is in a turn-on state; and an analog-to-digital converter configured to convert an output signal received from the first AFE circuit into a digital compensation signal, wherein the first AFE circuit includes, a sampling capacitor configured to store at least a portion of a sensed characteristic voltage, a sampling switch configured to selectively provide the sensed characteristic voltage to the sampling capacitor, and a first reset switch having a first end connected to the first sensing line and a second end configured to receive a first compensation voltage, and the first reset switch configured to operate in accordance with a first reset signal, wherein the first reset switch is configured to selectively provide the first compensation voltage to the first sensing line in response to the first reset signal turning on the first reset switch, the first reset switch is configured to turn on before the second channel switch is turned on, and the second channel switch is configured to turn on after the first channel switch is turned off.

Facts

Company
Samsung (Samsung Electronics Co., Ltd.)
Official title
DATA DRIVING CIRCUIT AND METHOD FOR OPERATING THE SAME
Publication number
US20260290278A1
Application number
19452597
Filed
Jan 19, 2026
Published
Sep 24, 2026
Inventors
2
Claims
20

Classified under

G09G 5/003 Physics & computingG09G 2310/0264 Physics & computingG09G 2330/02 Physics & computing
Read the full filing (official PDF) ↗ Open in the Patent Tracker

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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.