Light-Field Stereoscopic Display with Electrowetting Focus Control

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Stereoscopic display devices using binocular disparity technology suffer from focus-convergence mismatch, leading to decreased visibility of stereoscopic images.

Innovation Solution

A stereoscopic display device incorporating a display panel with a convex lens and a light control panel, which includes a water-oil interface controlled by electrodes, adjusts the light path for each frame to achieve focus-convergence matching using light field technology.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If binocular disparity technology is used to provide stereoscopic images, then different images can be provided to left and right eyes, but focus-convergence mismatch occurs causing decreased visibility

Engineering Contradiction:

Improvestereoscopic image visibilityVSAvoidfocus-convergence matching

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

A combiner is introduced as an intermediary component between the display panel and the user's eyes. The combiner reflects light from the display panel to create a virtual image at a specific location, enabling focus-convergence matching while maintaining the binocular disparity effect for stereoscopic vision

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system transitions from a two-dimensional display surface to a three-dimensional virtual image space. By using the combiner to reflect light and create a virtual image at a defined distance, the system adds a depth dimension that enables proper focus-convergence matching while preserving stereoscopic separation

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enhances the visibility of stereoscopic images by ensuring the virtual image aligns with the actual image, improving the overall perception of the stereoscopic effect.

Implementation Method 1

A convex lens may be disposed on the light control panel

Methodology Applied

Scientific EffectLight refraction and focusing: Lens

Implementation Method 2

A combiner may be disposed on the convex lens

Methodology Applied

Scientific EffectLight reflection: Reflection

Implementation Method 3

a light control panel, which includes a water-oil interface controlled by electrodes, adjusts the light path for each frame

Methodology Applied

Scientific EffectElectro-wetting: Electrowetting

Data Source

PatentEP3505993B1Stereoscopic display device

Publication Date: 2025.10.15 LG DISPLAY CO LTD

Figure 1A
Figure 1B
Figure 2A~2B

AI summary

A stereoscopic display device using light-field is provided. The stereoscopic display device includes a light control panel (200) on a display panel (100), so that light emitted from the display panel is emitted in a different direction for subsequent frames. Thus, in the stereoscopic display device, the visibility of the stereoscopic image which is provided to a user may be increased without the deterioration of the resolution.