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Samsung patents display chip design to improve screen signal stability

This patent describes a circuit design for a source driver, a component that controls the brightness of pixels in a screen. It uses a specific arrangement of capacitors and amplifiers to process input signals and output a stable data voltage to the display panel.

Why it mattersThis is a routine hardware improvement that helps ensure consistent image quality in Samsung's displays, such as those in phones and TVs.

In the filing’s own words

A source amplifier includes: an input circuit to receive an input signal from an input terminal and an output signal having a complementary relationship with the input signal, and output a first intermediate signal and a second intermediate signal, respectively, to a first intermediate node and a second intermediate node, based on the input signal and the output signal; an amplifier to amplify the first intermediate signal and the second intermediate signal, to output a third intermediate signal and a fourth intermediate signal; an output circuit configured to output the output signal, which is a data voltage, to an output terminal, based on the third intermediate signal and the fourth intermediate signal; a compensator including a first capacitor connected between the output terminal and the first intermediate node, and a second capacitor connected between the output terminal and the second intermediate node; and a feed-forward circuit.

What exactly they claim (claim 1)

1. A source amplifier comprising: an input circuit configured to: receive an input signal from an input terminal and an output signal having a complementary relationship with the input signal, and output a first intermediate signal and a second intermediate signal, respectively, to a first intermediate node and a second intermediate node, based on the input signal and the output signal; an amplifier configured to amplify the first intermediate signal and the second intermediate signal, to output a third intermediate signal and a fourth intermediate signal; an output circuit configured to output the output signal, which is a data voltage, to an output terminal, based on the third intermediate signal and the fourth intermediate signal; a compensator comprising: a first capacitor connected between the output terminal and the first intermediate node, and a second capacitor connected between the output terminal and the second intermediate node; and a feed-forward circuit comprising: a third capacitor connected to the first intermediate node and corresponding to the first capacitor, and a fourth capacitor connected to the second intermediate node and corresponding to the second capacitor.

Facts

Company
Samsung (SAMSUNG ELECTRONICS CO., LTD.)
Official title
Source amplifier and source driver including source amplifier
Patent number
US12743986B2
Application number
19328647
Filed
Sep 15, 2025
Granted
Sep 22, 2026
Inventors
4
Claims
20

Classified under

G09G 3/2092 Physics & computingG09G 3/3275 Physics & computingH03F 3/213 Electricity & electronicsH03F 3/2171 Electricity & electronicsH03F 3/45762 Electricity & electronicsG09G 3/3688 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.