Display Substrate Active Area Margin for Cover Glass Shift Tolerance
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Solution Overview
Problem
In display devices, shifts during the attachment of the cover glass can lead to a decrease in display quality due to the presence of dummy regions or covered outer peripheral edges, resulting in reduced display performance.
Innovation Solution
A display device with a display substrate featuring an active area larger than the display region, surrounded by a frame, where the cover glass is attached with a frame in its periphery, ensuring that the display region overlaps with the frame, thus preventing shifts from affecting the display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a cover glass with a frame is attached to the display surface, then the display device has a defined display region, but attachment shifts cause dummy regions or covered edges that decrease display quality
Solution Approach 1:
The active area is designed to be larger than the display region in advance, creating a margin that anticipates potential attachment shifts. This preliminary sizing ensures that even if the cover glass shifts during or after attachment, the display region remains fully within the active area, preventing dummy regions or covered edges from degrading display quality.
2Reliability
If the active area is made larger than the display region, then attachment shifts are tolerated, but the frame region occupies more space
Solution Approach 1:
The display substrate is designed with non-uniform area distribution: the active area is enlarged specifically in the regions that may be affected by attachment shifts, while the central display region maintains its required dimensions. This localized area adjustment ensures tolerance to shifts without unnecessarily increasing the overall frame region area.
Data Source
AI summary
A display device includes a display substrate including a plurality of pixels and including an active area longer than a display region, and a frame region formed to surround the active area, and a cover glass attached to a display surface side of the display substrate. A frame is provided in a periphery of the cover glass, and the frame covers an outer periphery of the active area. The display region is a region where the active area and a region surrounded by the frame of the cover glass overlap each other.