Liquid Crystal Display Position Compensation Area Expansion

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Solution Overview

Problem

Existing display devices with position compensation units for liquid crystal panels face issues in appropriately displaying images in regions without image data, leading to black marginal areas when positional shifts occur during bonding.

Innovation Solution

Incorporating a position compensation unit and an area expansion unit that compensates for display position shifts and expands the displayable area on the second liquid crystal panel by generating image data with increased resolution and duplicating pixel luminance values to prevent black margins, ensuring proper image display across the entire panel.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If position compensation is performed on the second liquid crystal panel, then positional alignment between panels is improved, but black marginal areas appear in regions without image data

Engineering Contradiction:

Improvepositional alignmentVSAvoidblack marginal areas

Core Design Contradiction:

Manufacturing precisionVSObject-generated harmful factors

Solution Approach 1:

The area expansion unit performs preliminary expansion of the displayable area before position compensation is applied. By expanding the image data to cover potential marginal areas in advance, the system ensures that when positional shifts occur during bonding, no black margins appear in the final display.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system changes the parameter of displayable area by expanding it beyond the original image boundaries. This parameter change allows the image data to cover regions that may become visible after position compensation, preventing black marginal areas while maintaining proper positional alignment.

Inventive Principle:

Principle #35Parameter changes

2Area of stationary object

If displayable area is expanded to prevent black margins, then image coverage is improved, but image resolution and quality may deteriorate

Engineering Contradiction:

Improvedisplayable areaVSAvoidimage resolution

Core Design Contradiction:

Area of stationary objectVSMeasurement precision

Solution Approach 1:

The area expansion unit creates copies of existing image data to fill the expanded displayable area. Instead of generating new high-resolution data, the system replicates existing pixel information to cover marginal areas, maintaining acceptable image quality while expanding coverage.

Inventive Principle:

Principle #26Copying

Solution Approach 2:

The system applies partial expansion only to the marginal areas that may become visible after position compensation, rather than uniformly expanding the entire image. This selective approach minimizes the impact on overall image resolution while sufficiently covering potential black margin regions.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS11887518B2Display device having displayable area expansion unit and cutting unit and control method thereof

Publication Date: 2024.01.30 SHARP KK

AI summary

A display device includes a first liquid crystal panel, a second liquid crystal panel disposed on a back face side of the first liquid crystal panel, a position compensation unit that compensates for a display position of an image on the second liquid crystal panel based on position compensation information indicating a relative positional relationship between the first liquid crystal panel and the second liquid crystal panel, and an area expansion unit that expands a displayable area of the image before the display position is compensated for or a displayable area of the image after the display position is compensated for by the position compensation unit.