Display Device Spacer Arrangement for Moire Prevention
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Solution Overview
Problem
Existing display devices face challenges in preventing moire while avoiding defects in pixels, particularly when spacers are arranged to avoid adverse effects on electrodes or wiring, as random spacer placement can cause moire but structured placement may lead to defects.
Innovation Solution
A display device design featuring a liquid crystal panel with spacers arranged between barrier electrodes, where each spacer overlaps with a filter of a different color, and is shaped to gradually increase in sectional area towards the barrier substrate, preventing moire and reducing defects by dispersing applied forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If spacers are arranged at random positions, then moire occurrence is prevented, but defects in pixels or wiring may occur due to adverse positioning
Solution Approach 1:
The patent applies local quality by differentiating the arrangement strategy for spacers based on their position relative to pixel regions. Spacers are arranged to avoid overlapping with pixel electrodes and wiring in critical areas, while maintaining random-like distribution in other regions. This localized differentiation prevents both moire (through sufficient randomness) and pixel defects (through strategic avoidance of sensitive areas).
Solution Approach 2:
The patent segments the display panel area into different zones: pixel electrode regions, wiring regions, and other regions. Spacers are arranged differently in each zone - avoided in pixel and wiring regions, and randomly distributed in other regions. This segmentation allows the system to achieve both moire prevention and defect avoidance by treating different areas with appropriate spacer arrangement strategies.
2Reliability
If spacers are arranged to avoid pixels and wiring, then defects are prevented, but moire may occur due to reduced randomness
Solution Approach 1:
The patent implements local quality by applying different arrangement characteristics to spacers in different regions. In pixel and wiring regions, spacers are strategically positioned to avoid defects. In non-critical regions, spacers are arranged with sufficient randomness to prevent moire. This localized differentiation resolves the contradiction by allowing randomness where needed while avoiding sensitive areas.
Solution Approach 2:
The patent resolves the contradiction by adding a spatial dimension consideration - arranging spacers at specific distances from pixel edges and wiring lines. This dimensional approach creates buffer zones that prevent spacer-pixel overlap while maintaining overall random distribution patterns, thereby preventing both moire and defects simultaneously.
3Ease of manufacture
If spacers are placed close to pixel electrodes, then manufacturing is simplified, but adverse effects on electrodes and wiring occur
Solution Approach 1:
The patent applies preliminary action by pre-establishing exclusion zones around pixel electrodes and wiring before final spacer placement. The controller is programmed with predetermined distance criteria that automatically prevent spacer placement in adverse positions. This preliminary constraint system simplifies manufacturing by providing clear placement rules while ensuring electrode and wiring integrity through automated distance verification.
Solution Approach 2:
The patent introduces an intermediary control mechanism - a predetermined distance criterion that mediates between manufacturing simplicity and electrode protection. This intermediary rule allows spacers to be placed as freely as possible while maintaining a safety buffer from sensitive areas, thus balancing ease of manufacture with reliability without requiring complex real-time monitoring.
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 prevents moire occurrence while minimizing defects in pixels by strategically placing spacers to overlap with different colored filters and dispersing forces, enhancing the display's performance and reliability.
Implementation Method 1
a barrier part in which a plurality of unit areas arranged above the display part, arranged in rows in a first direction, and each extending in a second direction intersecting with the first direction, the barrier part being a liquid crystal panel that changes over transmission and interruption of light incident on the unit areas
Data Source
AI summary
According to an aspect, a display device includes a display part having pixels and a color filter; and a barrier part in which unit areas arranged above the display part, arranged in rows in a first direction, and extending in a second direction intersecting with the first direction. The barrier part includes a barrier substrate that has barrier electrodes arranged for each unit area and extending in the second direction, a counter substrate, a liquid crystal layer, and spacers arranged between the barrier substrate and the counter substrate. Each of the spacers is arranged between one barrier electrode out of the barrier electrodes and the other barrier electrode adjacent to the one barrier electrode, and overlaps with a filter of a color different from a color of a filter of the color filter that overlaps with a spacer adjacent to the spacer in the second direction.