Stereoscopic Display Data Conversion for Sharpness

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Solution Overview

Problem

Existing stereoscopic image display devices face issues with display quality due to down-sampling and down-scaling methods, which result in significant differences between left and right images, leading to reduced sharpness and recognition difficulties when using polarization glasses.

Innovation Solution

A stereoscopic image display device with a patterned retarder and a data conversion unit that performs a weighted average on luminance signals of adjacent data lines, converting side-by-side type 3D image data into line-by-line type data to reduce image differences and maintain sharpness, using a display panel with pixel arrays and polarized light modulation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If down-sampling or down-scaling is performed to convert side-by-side type 3D image data into line-by-line type data, then the 3D image can be displayed on the display panel, but display quality deteriorates due to significant differences between left and right images and reduced sharpness

Engineering Contradiction:

Improvecompatibility with line-by-line display formatVSAvoiddisplay quality and sharpness

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent applies parameter changes by performing a weighted average operation on luminance signals of adjacent data lines during the conversion from side-by-side to line-by-line format. This mathematical transformation modifies the luminance parameters to reduce differences between left and right images while preserving sharpness, thereby resolving the contradiction between format adaptability and display quality

Inventive Principle:

Principle #35Parameter changes

2Stability of the object's composition

If down-sampling is performed by taking arithmetic average of adjacent lines, then left and right images have the same form, but blurring occurs due to reduction in spatial frequency

Engineering Contradiction:

Improveconsistency of image formVSAvoidsharpness and spatial frequency

Core Design Contradiction:

Stability of the object's compositionVSManufacturing precision

Solution Approach 1:

Instead of simple arithmetic averaging, the patent uses a weighted average operation that assigns different weights to odd and even data lines. This parameter change in the averaging method allows maintaining image form consistency while preserving spatial frequency information, thus avoiding blurring effects

Inventive Principle:

Principle #35Parameter changes

3Ease of manufacture

If simple averaging is used to convert side-by-side type data, then conversion is simple, but image differences between left and right eyes remain significant

Engineering Contradiction:

Improvesimplicity of conversion processVSAvoidimage information difference

Core Design Contradiction:

Ease of manufactureVSLoss of information

Solution Approach 1:

The patent modifies the conversion process by applying a weighted average operation that considers the specific characteristics of odd and even data lines. This parameter change in the conversion algorithm effectively reduces image differences between left and right eyes while maintaining practical implementability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The weighted average operation acts as an intermediary process between the original side-by-side data and the final line-by-line display data. This intermediary transformation step effectively bridges the gap by reducing image differences while preserving essential visual information

Inventive Principle:

Principle #24Intermediary (Mediator)

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 weighted average method effectively reduces image differences and preserves sharpness, enhancing display quality by minimizing spatial frequency reduction and improving readability and image recognition.

Implementation Method 1

a patterned retarder including a first retarder that transmits light which is incident from odd numbered display lines of the pixel array so as to be modulated into first polarized light, and a second retarder that transmits light which is incident from even numbered display lines of the pixel array so as to be modulated into second polarized light

Methodology Applied

Scientific EffectPolarization: Polarisation

Data Source

PatentUS8836775B2Stereoscopic image display device and driving method thereof

Publication Date: 2014.09.16 LG DISPLAY CO LTD

AI summary

A stereoscopic image display device includes a patterned retarder including a first retarder transmitting light incident from odd numbered display lines of the pixel array so as to be modulated into first polarized light, and a second retarder transmitting light incident from even numbered display lines so as to be modulated into second polarized light, and a data conversion unit converting input side-by-side type 3D image data into line-by-line type 3D image data, performing a weighted average for luminance signals of odd and even data which are vertically adjacent to each other in left image data of the side-by-side type 3D image data, and performing the weighted average for luminance signals of odd and even data which are vertically adjacent to each other in right image data of the side-by-side type 3D image data.