Display Electrode Layout to Prevent Spacer Light-Shield Overlap
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Solution Overview
Problem
Existing display technologies face issues with overlapping misalignment between array and counter substrates, which can cause optical effects from spacers due to light-shielding regions, especially when pixel size is reduced for higher resolution.
Innovation Solution
A display device design with a conductive layer having a grid shape and a light-shielding region that widens in certain directions, ensuring slits in the common electrode do not overlap the light-shielding region, thereby minimizing optical interference from spacers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pixel size is reduced to increase resolution, then the display resolution is improved, but the light-shielding region corresponding to the spacer may affect display quality
Solution Approach 1:
The patent extracts the harmful light-shielding effect from the spacer by providing a dedicated light-shielding layer that covers the spacer region. This separates the spacer's structural function from its harmful optical effect, allowing the spacer to maintain substrate distance while the light-shielding layer eliminates its negative impact on display quality in the display region.
Solution Approach 2:
The patent introduces a light-shielding layer as an intermediary element between the spacer and the display region. This intermediate layer absorbs or blocks the harmful light from the spacer before it can reach the display area, thereby protecting the display quality while allowing the spacer to remain in place for structural support.
2Object-affected harmful factors
If a light-shielding region is added to suppress optical effects of the spacer, then the optical effects are suppressed, but the device complexity increases
Solution Approach 1:
The patent merges the light-shielding function with existing structural layers in the display device. The light-shielding layer is integrated into the multi-layer structure alongside the spacer, color filter, and electrode layers, combining multiple functions into a unified structure that reduces overall device complexity while effectively suppressing optical effects.
Solution Approach 2:
The light-shielding layer serves multiple functions simultaneously: it suppresses optical effects from the spacer, maintains structural integrity of the display device, and can be integrated with other functional layers. This multi-functionality reduces the need for separate components, thereby minimizing increases in device complexity.
3Manufacturing precision
If the color filter is provided on the array substrate to reduce overlapping misalignment effects, then the misalignment effects are reduced, but the manufacturing complexity increases
Solution Approach 1:
The patent applies the color filter on the array substrate before assembling the counter substrate, establishing precise color filter positioning in advance. This preliminary action ensures that the color filter is correctly aligned with the pixel electrodes and other structures before the final assembly, reducing overlapping misalignment issues while streamlining the manufacturing process.
Data Source
AI summary
A display device includes an array substrate, and a counter substrate facing the array substrate. The array substrate includes a plurality of signal lines, a plurality of scanning lines, a color filter, a plurality of pixel electrodes, a common electrode, an insulating film, at least one spacer, and a conductive layer.