Display Panel Bezel Structure for Heat And Crack Containment
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Solution Overview
Problem
Existing display panels face challenges in minimizing the bezel region while preventing heat and crack propagation, particularly due to the exposure of inorganic films at the edge, which act as sources of heat conduction and crack initiation during manufacturing.
Innovation Solution
The display panel design includes an organic film that covers an extended portion of the inorganic film in the bezel region, effectively preventing heat and crack propagation by acting as an etch stopper during the manufacturing process, thereby minimizing the bezel size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the bezel region is minimized, then the display area is maximized, but heat and crack propagation cannot be prevented
Solution Approach 1:
An organic film is introduced as an intermediary layer between the inorganic film and the external environment in the bezel region. This organic film acts as a mediator that prevents direct heat conduction and crack propagation paths while allowing the inorganic film to remain exposed for manufacturing purposes. The organic film specifically covers the edge portion of the inorganic film, creating a protective barrier that enables bezel minimization without compromising reliability.
2Ease of manufacture
If the inorganic film is exposed at the bezel region, then heat conduction and crack propagation occur, but manufacturing process is simplified
Solution Approach 1:
The organic film is selectively applied only to the bezel region where the inorganic film edge is exposed, rather than covering the entire display panel. This local application provides targeted protection against heat conduction and crack propagation at the critical edge portion while maintaining manufacturing simplicity. The organic film's local presence addresses the harmful effects precisely where they occur without adding unnecessary complexity to the overall manufacturing process.
3Reliability
If additional crack stoppers are added, then crack propagation is prevented, but the bezel region size increases
Solution Approach 1:
The organic film changes the thermal and mechanical parameters of the bezel region by providing an insulating and protective layer over the inorganic film edge. This parameter change prevents heat conduction and crack propagation without requiring additional structural elements like crack stoppers. The organic film's material properties (low thermal conductivity, flexibility) enable crack prevention while maintaining a minimal bezel region size.
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
This design prevents heat and crack propagation, allowing for a reduced bezel region without the need for additional crack stoppers, enhancing the durability and flexibility of the display panel.
Implementation Method 1
an organic film configured to cover the extended portion of the inorganic film in a bezel region of the display panel
Data Source
AI summary
A display panel can include a circuit layer disposed on a flexible substrate, the circuit layer including a plurality of oxide thin film transistors (oxide TFTs) and/or a plurality of low temperature polysilicon thin film transistors (LTPS TFTs), a light-emitting element layer disposed on the circuit layer, the light-emitting element layer including a plurality of light-emitting elements, an encapsulation layer configured to cover the light-emitting element layer, a touch sensor layer disposed on the encapsulation layer, and a color filter layer disposed on the touch sensor layer. Also, the flexible substrate includes a display area and a non-display area, the circuit layer includes a gate driver disposed on at least one of sides of the non-display area, and each of the light-emitting elements includes an anode electrode, an organic compound layer, and a cathode electrode.