3D Display Barrier Part Crosstalk Reduction

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Solution Overview

Problem

Conventional 3D display technologies using liquid crystal displays face issues with reduced display quality due to crosstalk and decreased luminance, as they require repetitive backlight switching to prevent image mixing between left and right eyes, which affects the perceived 3D image.

Innovation Solution

A display apparatus employing a light directing element with a barrier part and a lens part, where the barrier part is driven to have a blocking state during an early scanning period and a transmitting state thereafter, preventing crosstalk by dividing a single 3D frame into subframes and controlling the light transmission states of the barriers in synchronization with the display panel's scanning timing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If the backlight is repetitively turned on and off to prevent crosstalk, then crosstalk between left and right eye views is reduced, but the perceived luminance of the display panel decreases

Engineering Contradiction:
ImprovecrosstalkVSAvoidperceived luminance
Core Design Contradiction:
Object-affected harmful factorsVSIllumination intensity

Solution Approach 1:

The barrier layer is divided into multiple independently controllable barrier regions corresponding to different subframes. Each barrier region can be selectively controlled to be in a light blocking state or light transmitting state, allowing precise control of light transmission to prevent crosstalk while maintaining luminance during active periods.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The display operates by dividing a single frame into multiple subframes and using periodic switching of barrier regions between light blocking and light transmitting states. This periodic action synchronizes with the subframe timing to prevent crosstalk while maintaining high luminance during active display periods.

Inventive Principle:
Principle #19Periodic action

2Adaptability or versatility

If the display area is divided to support left eye image and right eye image separately, then stereoscopic 3D image is achieved, but the effective resolution for each eye decreases

Engineering Contradiction:
Improvestereoscopic 3D image capabilityVSAvoideffective resolution
Core Design Contradiction:
Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The display area is segmented into multiple subframes in the time domain rather than dividing the spatial area. Each subframe displays image data for a specific eye, and the barrier layer segments the light transmission accordingly. This temporal segmentation maintains full spatial resolution for each eye while achieving stereoscopic effect.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The solution transitions from spatial division (dividing display area) to temporal division (dividing time into subframes). By adding the time dimension to the display strategy, full spatial resolution is preserved for each eye while still achieving separate left and right eye image delivery.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Adaptability or versatility

If barriers are used to selectively block image portions for left and right eyes, then stereoscopic 3D image is produced, but image crosstalk occurs during transition periods

Engineering Contradiction:
Improvestereoscopic 3D image capabilityVSAvoidimage crosstalk prevention
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The barrier regions are controlled to be in the light blocking state during transition periods before the active display period begins. This preliminary blocking action prevents crosstalk from occurring during the vulnerable transition phase, ensuring clean image separation before each subframe's active display.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The barrier layer undergoes periodic state transitions synchronized with subframe timing, entering light blocking state during transition periods and light transmitting state during active display periods. This periodic cycling ensures crosstalk prevention at critical moments while maintaining image quality during stable display phases.

Inventive Principle:
Principle #19Periodic action

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

This approach enhances the display quality of 3D images by reducing crosstalk and maintaining continuous backlight operation, thereby improving the perceived luminance and clarity of the 3D image.

Implementation Method 1

a barrier part and a lens part disposed on the barrier part... controlling the light transmission states of the barriers... selective light blocking and directing method

Methodology Applied
Scientific EffectLight blocking and directing:

Implementation Method 2

a lenticular lens having a plurality of focal points is used. The 2D image is refracted by the lenticular lens at the focal points of the left and right eyes

Methodology Applied
Scientific EffectRefraction: Refraction

Data Source

PatentUS9047798B2Display apparatus and method of displaying three dimensional images using plural barrier states
Publication Date: 2015.06.02 SAMSUNG DISPLAY CO LTD
  • US9047798B2 patent drawing
  • US9047798B2 patent drawing
  • US9047798B2 patent drawing

AI summary

A display apparatus includes a display panel, a display panel driver, a light source part, a light directing element and a barrier driver. The display panel displays a 3D image by dividing a single 3D image frame into plural sub frames including one corresponding to a first stereoscopic view for display during a first sub frame and a second corresponding to a second stereoscopic view for display during a second sub frame. The light source part provides selectively blockable backlighting. The light directing element is disposed between the display panel and the light source part so as to implement selective blocking. The light directing element includes a barrier part and a lens part disposed on the barrier part. The barrier part has a plurality of first electrodes and a plurality of second electrodes crossing the first electrodes.