OLED Bezel Structure for Impact Stress Distribution
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Solution Overview
Problem
Organic light-emitting display panels face stress issues due to external impacts, particularly when encapsulated with inorganic materials, which are fragile and prone to breakage under stress.
Innovation Solution
A bezel structure with a base plate and side walls, featuring concave-convex surfaces and a double-wall sidewall design, is used to accommodate and reinforce the display panel, enhancing impact resistance by distributing stress and increasing the structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the display panel is encapsulated with inorganic materials, then the display panel achieves good flatness and visual quality, but the encapsulated structure becomes fragile and prone to breakage under external impact stress
Solution Approach 1:
The patent employs a composite encapsulation structure combining inorganic encapsulation layers (for flatness and visual quality) with an organic encapsulation layer (for flexibility and impact resistance). This composite approach allows the structure to maintain good flatness while significantly improving strength and resistance to external impacts, preventing the inorganic encapsulation from breaking easily.
2Stability of the object's composition
If a rigid backing frame is used to support the display panel, then the structural stability is improved, but the stress concentration increases and may cause breakage of the fragile inorganic encapsulation
Solution Approach 1:
The patent modifies the mechanical properties of the encapsulation structure by introducing an organic encapsulation layer with different elasticity and stress distribution characteristics. This parameter change allows the structure to maintain stability while reducing stress concentration on the inorganic encapsulation, preventing breakage under external impacts.
3Strength
If the inorganic encapsulation layer is made thinner to reduce stress, then the impact resistance improves, but the manufacturing precision and visual quality deteriorate
Solution Approach 1:
The patent uses a composite encapsulation system where the inorganic layer maintains optimal thickness for flatness and visual quality, while the added organic layer provides the necessary impact resistance. This allows both requirements to be satisfied simultaneously without compromising either manufacturing precision or strength.
Data Source
AI summary
Disclosed is an organic light emitting display device including a bezel for protecting an organic light emitting display panel. The organic light emitting display device has a display panel including a first substrate, on which a pixel array having at least one organic light emitting diode is formed, a second substrate for encapsulating a pixel region of the first substrate, and an encapsulating material formed between the first substrate and the second substrate. The device further includes a bezel for receiving the display panel. The bezel accommodates the display panel and includes a lower plate with a waved surface and a sidewall extending from edges of the lower surface.