Organic Light Emitting Display Panel Absorbing Member Design
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Solution Overview
Problem
The thick film phenomenon during the coating of absorbing members on the internal surface of organic light emitting display panels leads to screen distortion and reduced light efficiency due to differences in refractive indexes and light leakage through the panel's circumference.
Innovation Solution
A second absorbing member is formed on the circumference of the image display unit, overlapping the first absorbing member, which is angular or planar in shape, and made of a colored metal or organic film, to prevent light from being transmitted through the panel's circumference, improving light absorption and reducing screen distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the internal surface of the panel is coated with a first absorbing member using screen printing or spraying method, then moisture absorption function is improved, but screen distortion occurs due to thick film phenomenon or dropping phenomenon
Solution Approach 1:
The absorbing member is divided into two distinct parts: a first absorbing member coated on the internal surface of the panel for moisture absorption, and a second absorbing member formed on the circumference of the image display unit to cover the thick film region. This segmentation allows each part to serve its specific function independently, resolving the contradiction between moisture absorption and film uniformity.
Solution Approach 2:
The second absorbing member is specifically positioned only on the circumference of the image display unit where the thick film phenomenon occurs, rather than uniformly across the entire panel. This local application addresses the specific problem area while maintaining the overall functionality of the first absorbing member.
2Illumination intensity
If light is allowed to transmit through the panel for display purposes, then image visibility is improved, but light leakage through the circumference reduces light efficiency and contrast
Solution Approach 1:
The second absorbing member is applied locally to the circumference of the image display unit where light leakage occurs, while the central image display area remains transparent for visibility. This selective application maintains image visibility while preventing energy loss through peripheral light leakage.
Solution Approach 2:
The panel's light transmission function is segmented into two zones: the central image display unit that allows light transmission for visibility, and the circumferential region covered by the second absorbing member that blocks light to prevent leakage. This spatial segmentation resolves the contradiction between visibility and energy efficiency.
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 solution effectively prevents screen distortion and enhances light efficiency by ensuring light is emitted only through the intended areas, thereby improving contrast and product competitiveness.
Implementation Method 1
The internal surface of the panel that faces the organic light emitting diode is coated with an absorbing member for absorbing moisture that can be received from the outside of the organic light emitting display
Implementation Method 2
a second absorbing member formed on the circumference of the image display unit between the first absorbing member and the internal surface of the panel to overlap the circumference of the first absorbing member
Data Source
AI summary
An organic light emitting display capable of preventing the generation of screen distortion caused by a thick film phenomenon that occurs when the internal surface of a panel is coated with an absorbing member and a method of fabricating the same. The organic light emitting display includes a substrate on which an image display unit including at least one organic light emitting diode is formed. A panel is formed on the substrate to seal the image display unit. A first absorbing member is formed on the internal surface of the panel on the image display unit that faces the organic light emitting diode. A second absorbing member is formed on the circumference of the image display unit between the first absorbing member and the internal surface of the panel to overlap the circumference of the first absorbing member.