Tiled Display Edge Structure for Seamless Boundary Reduction
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Solution Overview
Problem
Large-sized display devices face increased defect rates and reduced productivity due to the number of pixels, leading to a sense of disconnection and reduced immersion when multiple display devices are tiled together, as the boundary portions between them are noticeable.
Innovation Solution
A tiled display device design that minimizes the non-display areas by using a substrate with emission and light blocking areas, a thin film transistor layer, a light emitting element layer, and a reflective member to reflect light and reduce the visibility of boundaries between adjacent display devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple display devices are connected to form a large-sized display, then the display area is increased, but the boundary portions between devices become noticeable and reduce the sense of immersion
Solution Approach 1:
The patent extracts and removes the non-display area (bezel) from the display device structure. By eliminating the traditional bezel and using a substrate that extends to the edges with emission areas covering the entire surface, the boundary portions between adjacent display devices are removed, preventing them from being noticeable and maintaining the sense of immersion across the tiled display.
Solution Approach 2:
The patent merges the display area and non-display area by making the substrate extend beyond the emission areas. The emission areas are positioned such that they cover substantially the entire front surface of the substrate, eliminating the traditional separation between display and non-display regions. This merging approach allows adjacent display devices to be connected with minimal gaps, creating a seamless tiled display.
2Ease of operation
If the non-display area is minimized to reduce boundary visibility, then the sense of immersion is improved, but the structural support and electrical connection areas may be compromised
Solution Approach 1:
The patent moves the electrical connection functionality from the front surface (where it would consume display area) to the back surface of the substrate. The connection lines are configured to extend to the back surface, and pad portions are formed on the back surface for electrical connections. This dimensional relocation allows the front surface to be fully utilized for emission areas while maintaining reliable electrical connections through the back surface.
Solution Approach 2:
The substrate is designed as a thin, flexible structure that extends beyond the emission areas. This thin film approach allows the substrate to provide structural support while minimizing the non-display area. The substrate's flexibility enables it to extend to the edges and provide both structural integrity and electrical connection pathways without requiring thick bezels or additional support structures.
3Ease of operation
If the emission areas cover substantially the entire front surface, then the sense of immersion is enhanced, but the manufacturing precision requirements increase
Solution Approach 1:
The substrate serves multiple functions: it provides structural support, defines the emission areas, and extends to the edges to eliminate non-display areas. By making the substrate itself the boundary-defining element rather than requiring separate bezel structures, the patent simplifies the manufacturing process and reduces precision requirements for aligning multiple components.
Solution Approach 2:
The emission areas are positioned and configured during the substrate manufacturing process itself, before the display devices are assembled into a tiled configuration. The substrate is designed with predetermined emission area locations and extensions that automatically ensure proper alignment and minimal gaps when multiple devices are connected, eliminating the need for post-assembly adjustments or high-precision alignment procedures.
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 minimizes the gap between display devices, preventing the recognition of boundary portions and enhancing the sense of immersion by ensuring seamless image display across the tiled screen.
Implementation Method 1
a reflective member overlapping the passivation layer and reflecting light emitted from the light emitting diode toward the substrate
Data Source
AI summary
A display device comprises a substrate including emission areas, and light blocking areas adjacent to the emission areas, a thin film transistor layer comprising a thin film transistor disposed on the substrate, and a connection line electrically connected to the thin film transistor, a light emitting element layer disposed on the thin film transistor layer and comprising light emitting elements corresponding to the emission areas, an encapsulation layer overlapping the light emitting element layer, and a pad portion disposed on the encapsulation layer and in electrical contact with the connection line through a contact hole in the encapsulation layer.