Backlight Segmentation for Stereoscopic Display Reverse View Suppression

Solution Overview

Problem

Stereoscopic image display devices struggle with maintaining visibility when viewed from an oblique direction due to the presence of reverse views, where left and right videos are inverted, degrading the stereoscopic image experience.

Innovation Solution

A stereoscopic image display device with a back light unit featuring a first illumination section for planar image display and a second illumination section with a narrower angle for stereoscopic image display, which narrows the viewing angle and reduces the influence of reverse views by using a parallax barrier or lenticular lens as the optical component.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a wide viewing angle is used for planar image display, then visibility and recognition are improved, but reverse view occurs causing left and right videos to be inverted when viewed obliquely

Engineering Contradiction:

Improvevisibility of planar imageVSAvoidreverse view effect

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The backlight unit is divided into two separate illumination sections: a first illumination section with a wide outgoing angle for planar image display, and a second illumination section with a narrow outgoing angle for stereoscopic image display. This segmentation allows each section to be optimized for its specific function without compromise

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically switches between the first and second illumination sections based on the display mode (planar or stereoscopic). The control unit activates the appropriate illumination section according to the type of image being displayed, enabling adaptive optimization of viewing angle characteristics

Inventive Principle:

Principle #15Dynamics

2Object-affected harmful factors

If a narrow viewing angle is used to suppress reverse view, then stereoscopic image visibility is improved, but planar image visibility in oblique directions is degraded

Engineering Contradiction:

Improvereverse view suppressionVSAvoidvisibility of planar image

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The backlight unit is divided into two separate illumination sections: a first illumination section with a wide outgoing angle for planar image display, and a second illumination section with a narrow outgoing angle for stereoscopic image display. This segmentation allows each section to be optimized for its specific function without compromise

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically switches between the first and second illumination sections based on the display mode (planar or stereoscopic). The control unit activates the appropriate illumination section according to the type of image being displayed, enabling adaptive optimization of viewing angle characteristics

Inventive Principle:

Principle #15Dynamics

3Device complexity

If a single illumination section is used for both planar and stereoscopic display, then device complexity is reduced, but optimal viewing angle control for different image types cannot be achieved

Engineering Contradiction:

Improvebacklight unit structureVSAvoidviewing angle control

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The backlight unit is divided into two separate illumination sections: a first illumination section with a wide outgoing angle for planar image display, and a second illumination section with a narrow outgoing angle for stereoscopic image display. This segmentation allows each section to be optimized for its specific function without compromise

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically switches between the first and second illumination sections based on the display mode (planar or stereoscopic). The control unit activates the appropriate illumination section according to the type of image being displayed, enabling adaptive optimization of viewing angle characteristics

Inventive Principle:

Principle #15Dynamics

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

The solution effectively suppresses the reverse view effect and enhances visibility by narrowing the viewing angle during stereoscopic image display, while maintaining high luminance levels, improving the overall stereoscopic image experience.

Implementation Method 1

a second illumination section that illuminates the image display unit at a second outgoing angle, which is narrower than the first outgoing angle

Methodology Applied

Scientific EffectLight: Light

Data Source

PatentUS9110213B2Stereoscopic image display device and method of driving stereoscopic image display device

Publication Date: 2015.08.18 MAGNOLIA WHITE CORP

AI summary

A stereoscopic image display device includes: an image display unit that can display parallax images; an optical component that causes the parallax images to be recognized as a stereoscopic image; and a back light unit that is arranged on a rear face side of the image display unit, wherein the back light unit includes a first illumination section that illuminates the image display unit at a first outgoing angle at the time of displaying a planar image by using the image display unit and a second illumination section that illuminates the image display unit at a second outgoing angle, which is narrower than the first outgoing angle, at the time of displaying a stereoscopic image by using the image display unit and the optical component.