Thin Glass Display Frame Bending for Narrow Bezel
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Solution Overview
Problem
Existing electro-optical display devices face challenges in narrowing the frame region while maintaining reliability and flexibility, which is essential for thin and lightweight designs, especially in tiling applications where a seamless display is required.
Innovation Solution
The electro-optical device features a display panel with a thickness of 50 μm or less on a glass substrate, allowing for bending at a right angle without micro cracks, and a support frame that bends the frame regions to reduce their visible length, thereby narrowing the frame while ensuring reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the frame region is lengthened to prevent moisture permeation and secure reliability, then reliability is improved, but the frame width increases and frame narrowing cannot be realized
Solution Approach 1:
The patent applies dimensionality change by bending the frame region from a planar configuration to a three-dimensional folded structure. The frame region is bent along a bending line to form a folded portion that extends in the thickness direction, effectively utilizing the third dimension (depth) to provide moisture barrier length without increasing the planar frame width. This resolves the contradiction by transforming the moisture barrier path from a two-dimensional planar extension to a three-dimensional folded structure.
Solution Approach 2:
The patent implements nesting by folding the frame region back onto itself, creating a nested structure where the bent portion is positioned behind the display region. The frame region is folded along a bending line such that part of it is nested within the structural depth of the display device, effectively hiding the moisture barrier length within the device's thickness dimension rather than extending it in the planar view.
2Adaptability or versatility
If the glass substrate is made thin to provide flexibility, then flexibility is improved, but the frame region cannot be effectively narrowed without compromising structural integrity
Solution Approach 1:
The patent utilizes dimensionality change by bending the thin glass substrate's frame region along a bending line to create a folded structure that extends in the thickness direction. This allows the frame region to maintain its moisture barrier function through extended path length while appearing narrowed in the planar view, effectively using the third dimension to resolve the contradiction between thinness and frame width.
Solution Approach 2:
The patent applies the principle of flexible shells and thin films by making the glass substrate thin (50 μm or less) to enable bending. The thin glass substrate can be flexed along the bending line to form the folded frame region, which maintains structural integrity while achieving both flexibility and frame narrowing. The thin film structure allows the frame region to be bent without breaking while still providing sufficient moisture barrier function.
3Reliability
If the frame region is lengthened to secure reliability, then reliability is improved, but seamless tiling becomes difficult and display quality is compromised
Solution Approach 1:
The patent resolves the contradiction by bending the frame region to utilize the thickness dimension, effectively moving the extended moisture barrier path out of the planar view. The folded frame region provides sufficient moisture barrier length for reliability while being positioned in the depth dimension, making it invisible or minimal in the planar display area and enabling seamless tiling of multiple display devices.
Solution Approach 2:
The patent implements nesting by folding the frame region behind the display region, creating a nested configuration where the moisture barrier structure is hidden within the device's structural depth. This nested arrangement provides adequate moisture protection while minimizing the visible frame width, allowing multiple displays to be tiled together with minimal visible seams.
Data Source
AI summary
An electro-optical device includes a display panel obtained by forming an electro-optical layer, in which a plurality of pixels is formed, on a glass substrate having a thickness of 50 μm or less; and a support frame supporting the display panel, wherein the display panel has at least a display region in which the plurality of pixels is formed and frame regions formed outside the display region, and wherein at least one side of each of the frame regions is bent from the vicinity of a circumference of the display region to the support frame side and is fixed to the support frame.