Tiled Display Substrate Structure for Seamless Panel Joining
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Solution Overview
Problem
Large-sized display devices face increased defect rates and productivity issues due to the number of pixels, leading to reliability concerns and a sense of discontinuity when tiled, as seams between connected display units cause a non-immersive viewing experience.
Innovation Solution
A tiled display device design featuring a substrate with chamfer surfaces, a display area with light emitting elements, and a non-display area with engraved patterns and trench portions to minimize seams and prevent incomplete peeling of protective films, enhancing immersion and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a large-sized display device is manufactured with increased number of pixels, then the display size is improved, but the defect rate increases and reliability deteriorates
Solution Approach 1:
The display device is divided into multiple sub-display devices arranged in a matrix pattern, with each sub-display device containing a subset of the total pixels. This segmentation allows each unit to be manufactured and tested separately, improving overall reliability while achieving large display size through combination of multiple units.
2Area of stationary object
If multiple display devices are connected to form a tiled display, then the display size is improved, but boundary portions create a sense of discontinuity reducing immersion
Solution Approach 1:
The non-display area is strategically positioned and designed within each sub-display device to be hidden or minimized at the boundaries where devices are connected. This extraction of the non-display area from visible boundary regions eliminates the sense of discontinuity and improves immersion while maintaining the tiled display configuration.
3Reliability
If a front protective film is applied to protect the display surface, then the display is protected during manufacturing, but incomplete peeling occurs during the manufacturing process
Solution Approach 1:
The non-display area is designed with specific structural characteristics that create localized differences in adhesion properties. These local quality variations enable the protective film to be easily peeled off from the non-display area during manufacturing while maintaining strong adhesion in the display area, preventing incomplete peeling and improving manufacturing ease.
Data Source
AI summary
A display device comprises a substrate comprising a first surface, a second surface opposite to the first surface, a first chamfer surface extending from a side of the first surface, a second chamfer surface extending from a side of the second surface, and a side surface connecting the first chamfer surface to the second chamfer surface, a display area including a plurality of light emitting elements disposed on the first surface of the substrate, a non-display area surrounding the display area on the first surface of the substrate, an engraved pattern portion disposed at a corner portion of the non-display area and recessed from an upper surface of the non-display area, and a trench portion disposed at a plurality of edge portions of the non-display area to surround the display area and recessed toward the substate.