Self-Emissive Display Backlight for Glasses-Free 3D Imaging

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Solution Overview

Problem

Conventional stereoscopic displays require viewers to wear glasses or be close to the device to separate left and right eye views, and existing 2D/3D image displays face challenges with power consumption due to backlight devices in LCDs.

Innovation Solution

A 2D/3D display system comprising a liquid crystal display device and a self-emissive display device, where the self-emissive device serves as a backlight source and provides a parallax barrier pattern to create 3D images without the need for glasses, reducing power consumption by eliminating the need for a separate backlight device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If a conventional LCD with separate backlight device is used, then image display function is provided, but power consumption increases

Engineering Contradiction:

Improvepower consumptionVSAvoiddevice structure

Core Design Contradiction:

Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The patent combines the backlight source and parallax barrier function into a single self-emissive display device positioned behind the LCD. This merged structure eliminates the need for separate backlight devices while providing both illumination and 3D image formation capabilities, thereby reducing power consumption and simplifying device complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The self-emissive display device serves multiple functions simultaneously: it acts as a backlight source for the LCD and generates the parallax barrier pattern for 3D image formation. This multi-functional design replaces what would traditionally require separate components, reducing overall system complexity and energy consumption.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If parallax barrier is added to LCD to create 3D image, then 3D display capability is achieved, but alignment difficulty increases

Engineering Contradiction:

Improve3D display capabilityVSAvoidalignment precision

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent merges the parallax barrier function with the backlight source by using the self-emissive display device behind the LCD to generate the parallax barrier pattern. This integration eliminates the need for separate alignment between independent LCD and parallax barrier components, thereby maintaining 3D display capability while significantly improving ease of manufacture.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If two separate LCDs are used for 2D/3D display, then 2D/3D image capability is provided, but power consumption increases

Engineering Contradiction:

Improve2D/3D image capabilityVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The patent combines the functions of two separate LCDs into a hybrid structure where a self-emissive display device provides both backlight and parallax barrier patterns, while the front LCD handles image display. This merged approach maintains 2D/3D image capability while reducing power consumption by eliminating the need for two independent backlight systems.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The self-emissive display device performs multiple functions that would traditionally require two separate LCDs: it provides backlight illumination and generates the parallax barrier pattern for 3D imaging. This multi-functional design reduces the overall system to fewer components while maintaining full 2D/3D capability and lowering power consumption.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Enables the creation of 3D images without the need for glasses and reduces power consumption by using a self-emissive display as a backlight source, allowing for adjustable parallax barrier patterns to enhance image rendering.

Implementation Method 1

a self-emissive display device... providing a backlight source

Methodology Applied

Scientific EffectSelf-emissive light emission: Electroluminescence

Implementation Method 2

a liquid crystal display device provides a first image

Methodology Applied

Scientific EffectLiquid crystal optical modulation: Liquid Crystals

Implementation Method 3

An image with a parallax barrier pattern is formed... such that a viewer sees a 3D image... by transferring the 2D image through the parallax barrier pattern

Methodology Applied

Scientific EffectParallax barrier optical effect: Parallax

Data Source

PatentUS7477331B22D/3D display and method for forming 3D image

Publication Date: 2009.01.13 AU OPTRONICS CORP

AI summary

A display capable of providing 2D and/or 3D images. The display comprises a liquid crystal display device and a self-emissive display device. The self-emissive display device is disposed on the rear of the liquid crystal display device, in which the liquid crystal display device provides a first image and the self-emissive display device a second image and a backlight source. One of the first and second images comprises a parallax barrier pattern for forming a three-dimensional (3D) image, and the other is a 2D image.