Dual-Emitter Display Gamma Control for Privacy Viewing Angles

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Solution Overview

Problem

Existing display devices lack the ability to dynamically control viewing angles, particularly in environments where information security or safety regulations require restricted viewing, such as in vehicles, leading to potential exposure of sensitive information.

Innovation Solution

A display device incorporating a first and second light-emitting element, along with an optical path control layer, which calculates emission efficiency graphs and gamma values to switch between modes, allowing for controlled viewing angles through a display device driving method.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a display device operates in a single mode with fixed viewing angle, then manufacturing is simple, but adaptability to different viewing requirements is poor

Engineering Contradiction:

Improveviewing angle controlVSAvoiddisplay structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements dynamic viewing angle control by switching between a first mode (first light-emitting element active) and a second mode (second light-emitting element active), allowing the display to adapt its optical characteristics based on viewing requirements rather than maintaining a fixed structure

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The display device is divided into multiple light-emitting elements (first and second light-emitting elements) with different optical characteristics, enabling segmented control of light emission paths to achieve different viewing angles through mode switching

Inventive Principle:

Principle #1Segmentation

2Illumination intensity

If emission efficiency is optimized for one light-emitting element, then luminance performance improves, but overall display quality deteriorates when switching modes

Engineering Contradiction:

ImproveluminanceVSAvoiddisplay quality consistency

Core Design Contradiction:

Illumination intensityVSManufacturing precision

Solution Approach 1:

The patent uses luminance-specific time graphs and emission efficiency calculations to determine optimal gamma values for each light-emitting element, creating a feedback mechanism that adjusts display parameters based on measured performance to maintain consistent quality across mode transitions

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

Different gamma values are applied to the first and second light-emitting elements based on their respective emission efficiency characteristics, allowing parameter optimization for each element while maintaining overall display quality consistency through calculated compensation

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20260018108A1Display device, electronic device including the same and display device driving method

Publication Date: 2026.01.15 SAMSUNG DISPLAY CO LTD

AI summary

A display device driving method includes providing a display device including a first light-emitting element, a second light-emitting element, and an optical path control layer, generating a first graph by calculating first emission efficiency according to a luminance-specific time of the first light-emitting element, generating a second graph by calculating second emission efficiency according to a luminance-specific time of the second light-emitting element, calculating an emission ratio based on the first graph and the second graph, and calculating a first gamma value and a second gamma value, which are respectively applied to the first light-emitting element and the second light-emitting element, based on the emission ratio.