Zero Bezel Display Apparatus with Multi-Layer Routing
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Solution Overview
Problem
Existing multi-display apparatuses suffer from a sense of disconnection due to boundary portions formed between adjacent display apparatuses, resulting in reduced viewer immersion.
Innovation Solution
A display apparatus and multi-screen display apparatus with a zero bezel width, featuring a display area with pixels arranged on a substrate, a circuit layer with pixel driving lines, a planarization layer, a light emitting device layer, and multiple encapsulation layers, which eliminates the need for a bezel and enhances image continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bezel is used to cover the bezel area, then the display apparatus is protected and structurally complete, but the bezel width increases and creates boundary portions that reduce image continuity
Solution Approach 1:
The invention extracts and removes the bezel area from the display apparatus structure. By eliminating the need for a bezel to cover the bezel area, the patent achieves zero bezel width while maintaining protection through alternative means (edge seal structure). This resolves the contradiction by taking out the harmful bezel element that caused both protection and width issues.
Solution Approach 2:
The invention merges the protective function with the edge seal structure. Instead of using a separate bezel for protection, the edge seal structure performs both the sealing and protective functions, eliminating the need for additional bezel width while maintaining structural integrity and protection.
2Area of stationary object
If multiple display apparatuses are arranged to form a multi-display apparatus, then a large screen is achieved, but boundary portions (seams) are formed that create a sense of disconnection and reduce viewer immersion
Solution Approach 1:
The invention extracts and eliminates the boundary portions (seams) between adjacent display apparatuses. By removing the bezel area that created these boundaries, the patent enables seamless edge-to-edge alignment of multiple displays, achieving continuous images across the entire multi-display surface without visual interruptions.
Solution Approach 2:
The invention merges adjacent display apparatuses into a unified visual surface by eliminating the separating bezel areas. This allows multiple displays to be positioned so closely that their active display areas form a continuous, seamless image, creating the effect of a single large display without boundary interruptions.
3Length of stationary object
If the bezel area is eliminated to achieve zero bezel width, then image continuity is improved, but contact defects between pads and routing lines may occur
Solution Approach 1:
The invention moves the pads and routing lines from the traditional planar configuration to a three-dimensional arrangement using multiple layers. By stacking routing lines across different layers and using vertical connections (via holes), the design accommodates the eliminated bezel area while maintaining reliable electrical contacts between pads and routing lines through the layered structure.
Solution Approach 2:
The invention nests routing lines within multiple layers, with each layer containing conductive patterns that connect to the previous layer through via holes. This nested, multi-layered configuration allows electrical connections to be maintained in the vertical dimension, compensating for the horizontal space saved by eliminating the bezel area.
Data Source
AI summary
A display apparatus may include a display area including a plurality of pixels arranged over a first substrate along a first direction and a second direction crossing the first direction, a circuit layer disposed in the display area and configured to include a plurality of pixel driving lines coupled to the plurality of pixels, a planarization layer covering the circuit layer, a light emitting device layer disposed over the planarization layer, a first encapsulation layer wholly or fully covering the light emitting device layer and directly contacting an uppermost surface of the circuit layer, a second encapsulation layer wholly or fully covering the first encapsulation layer and directly contacting the uppermost surface of the circuit layer, and a third encapsulation layer wholly or fully covering the second encapsulation layer and directly contacting the uppermost surface of the circuit layer.