Gamma Voltage Switching for Low-Power Display Crosstalk Control

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Solution Overview

Problem

Existing display devices face challenges in maintaining display quality while reducing power consumption, particularly in compensating for voltage fluctuations in driving power sources, which can lead to increased power consumption or line crosstalk phenomena.

Innovation Solution

A display device with a dual voltage generation system that includes a first voltage generator compensating for both rising and falling of the driving power source and a second voltage generator compensating only for rising power, combined with a timing controller that selectively switches between these generators based on pattern detection to minimize power consumption and prevent line crosstalk.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a first voltage generator compensating for both rising and falling of the driving power source is used, then display quality is improved, but power consumption increases

Engineering Contradiction:

Improvedisplay qualityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system dynamically switches between two voltage generation modes (first voltage generator for rising/falling compensation, second voltage generator for rising compensation only) based on the detected pattern type, adapting the compensation strategy to minimize power consumption while maintaining display quality

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

Different compensation strategies are applied to different horizontal line patterns: full compensation (rising and falling) is applied to patterns requiring high display quality, while partial compensation (rising only) is applied to patterns where power saving is prioritized

Inventive Principle:

Principle #3Local quality

2Use of energy by moving object

If a second voltage generator compensating only for rising power is used, then power consumption is reduced, but line crosstalk occurs

Engineering Contradiction:

Improvepower consumptionVSAvoidline crosstalk

Core Design Contradiction:

Use of energy by moving objectVSObject-generated harmful factors

Solution Approach 1:

A pattern detection unit acts as an intermediary that analyzes the horizontal line pattern and determines the appropriate voltage generator to use, preventing line crosstalk by selecting full compensation mode when necessary and power-saving mode when safe

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The compensation parameters are changed based on the detected pattern: full compensation is applied when line crosstalk risk is high, while partial compensation is applied when power saving is needed and crosstalk risk is low

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20260057833A1Display device and method of driving the same, and electronic device

Publication Date: 2026.02.26 SAMSUNG DISPLAY CO LTD

AI summary

A display device including: pixels generating a predetermined light in response to a driving current supplied from a first driving power source; a data driver generating data signals using gamma voltages and supplying the data signals to the pixels; a first voltage generator generating a first raw reference voltage and a first reference voltage in which rising and falling of the first driving power source are compensated; a second voltage generator generating a second raw reference voltage and a second reference voltage in which rising of the first driving power source is compensated; a selector supplying the first raw reference voltage and the first reference voltage, or the second raw reference voltage and the second reference voltage to a gamma driver in response to a selection signal; and a timing controller comparing data in units of horizontal lines and generating the selection signal based on a comparison result.