OLED Display Adhesive Layer Eliminates Air Gaps
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Solution Overview
Problem
Organic light emitting diode (OLED) displays face issues with reduced light transmittance and image visibility due to air gaps between the cover window and display panel, and are prone to damage from external impacts due to the presence of supporting members like bezels, which also hinder assembly efficiency.
Innovation Solution
An OLED display design featuring a guide frame with a flange and side wall on the cover window, an adhesive layer made of transparent material to fill the space between the cover window and display panel, and an adhesive member between the flange and cover window, enhancing impact resistance and assembly efficiency while minimizing refractive index differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a supporting member (bezel) is used to support the display panel and cover window, then the structural strength and support are improved, but the impact resistance deteriorates because the supporting member may be deformed by external impact and collide with the display panel
Solution Approach 1:
The patent removes the supporting member (bezel) from the OLED display structure. By extracting this component that causes impact damage, the display panel is no longer subjected to collision forces from the supporting member during external impacts, thereby improving impact resistance while maintaining structural integrity through alternative design
2Device complexity
If an air gap is formed between the cover window and display panel, then the assembly is simplified, but the light transmittance and image visibility deteriorate due to refractive index difference
Solution Approach 1:
The patent introduces an adhesive layer as an intermediary substance between the cover window and display panel. This adhesive layer fills the air gap and has a refractive index that bridges the optical properties of glass and air, thereby improving light transmittance and image visibility while maintaining the simplified assembly structure
Solution Approach 2:
The patent changes the optical parameter (refractive index) of the medium between the cover window and display panel by replacing air with an adhesive material. This parameter change reduces the refractive index difference, minimizing optical distortion and improving light transmittance without complicating the assembly process
3Reliability
If the supporting member is omitted to improve impact resistance, then the impact resistance is improved, but the assembly efficiency significantly deteriorates
Solution Approach 1:
The patent merges the functions of the supporting member and the adhesive layer into a single integrated solution. The adhesive layer simultaneously provides structural support, sealing, and optical optimization, eliminating the need for a separate supporting member while maintaining assembly efficiency through a streamlined bonding process
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 improves image visibility, impact resistance, and assembly efficiency by eliminating air gaps and reducing refractive index differences, while providing mechanical strength and reliability through the use of an elastic adhesive layer and guide frame configuration.
Implementation Method 1
Due to a refractive index difference between the cover window and the air in the air gap, the light transmittance and the image visibility of such an OLED display is decreased
Implementation Method 2
an adhesive layer to attach the cover window to the display panel
Data Source
AI summary
An OLED display and a manufacturing method thereof. The OLED includes: a cover window; a guide frame disposed on the cover window; an adhesive layer disposed on the cover window, within the guide frame, and a display panel attached to the cover window, via the adhesive layer.