Source Driver Gamma Switching for Blank Frame Display

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Solution Overview

Problem

Existing display technologies require additional amplifiers to display blank frames, increasing the size and complexity of the display driver IC.

Innovation Solution

A display driving device that displays blank frames without a separate amplifier by using a gamma voltage generator to output a second gamma voltage during a specific time period, disabling the amplifier during this time.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a separate amplifier is used to display blank frames, then the display function is improved, but the device complexity and size increase

Engineering Contradiction:

Improvedisplay functionVSAvoiddevice complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The existing amplifier is designed to perform multiple functions: it amplifies data signals during active frames and outputs gamma voltages during blank frames. This eliminates the need for a separate amplifier dedicated to blank frame display, thereby reducing device complexity while maintaining full display functionality.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent combines the blank frame display function with the existing amplifier by having it output gamma voltages directly during blank frames. This merging of functions into a single component reduces the overall number of components and simplifies the device structure.

Inventive Principle:

Principle #5Merging (Combining)

2Adaptability or versatility

If a separate amplifier is used to display blank frames, then the display function is improved, but the area of the display driver IC increases

Engineering Contradiction:

Improvedisplay functionVSAvoidarea of display driver IC

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The amplifier is designed to serve dual purposes: processing data signals during active frames and outputting gamma voltages during blank frames. This multi-functionality eliminates the need for additional amplifier circuits, thereby reducing the overall area of the display driver IC while maintaining complete display capability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

By merging the blank frame output function into the existing amplifier, the patent eliminates the need for separate amplifier circuits that would occupy additional IC area. The single amplifier handles both active frame and blank frame operations, minimizing the total area required.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20250292717A1Source driver, display driving device, and display device including the same

Publication Date: 2025.09.18 SAMSUNG ELECTRONICS CO LTD

AI summary

Provided is a source driver including: a gamma voltage generator configured to: output a plurality of first gamma voltages during a first time period, and output a second gamma voltage to a plurality of source lines during a second time period different from the first time period, wherein the gamma voltage generator is connected to the plurality of source lines during the second time period; and a plurality of amplifier areas connected to the plurality of source lines, wherein the plurality of amplifier areas are configured to: output a plurality of data signals based on the plurality of first gamma voltages during the first time period, and be disabled during the second time period.