OLED Film with Opening Reduces Moisture Contact
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Solution Overview
Problem
Conventional organic light emitting display devices face challenges in processing time due to complexity in forming drivers and lines, and are prone to image quality degradation from contact between moisture absorbents and the display unit, leading to dark spots or line failures.
Innovation Solution
An organic light emitting display device structure featuring a film with openings between substrates to reduce contact between the display unit and moisture absorbent, simplifying the manufacturing process and allowing for chip-on-film mounting of drivers, thereby maintaining a distance between substrates and reducing line complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If drivers and lines are formed on the first substrate, then the display device can be manufactured, but the processing time is elongated due to process complexity
Solution Approach 1:
The device is divided into separate functional modules: the display unit on the first substrate and the driver unit on the second substrate. This segmentation allows independent manufacturing of each module, reducing the overall process complexity and time required for integration.
Solution Approach 2:
A flexible printed circuit board (FPC) is introduced as an intermediary component to connect the display unit on the first substrate with the driver unit on the second substrate. This mediator enables signal transmission while allowing the two substrate planes to remain separate, simplifying the manufacturing process.
2Reliability
If moisture absorbent is disposed on the second substrate, then moisture protection is provided, but contact with the display unit causes dark spots or line failures degrading image quality
Solution Approach 1:
The moisture absorbent is extracted from direct contact with the display unit by placing it on the second substrate, which is positioned away from the first substrate containing the display unit. This separation maintains the moisture protection function while eliminating the harmful contact effect.
Solution Approach 2:
The FPC and the spatial separation between substrates act as intermediaries that prevent direct contact between the moisture absorbent and the display unit, while still allowing the moisture absorbent to fulfill its protective function in the sealed enclosure.
3Volume of moving object
If substrates are positioned close together, then device compactness is achieved, but contact between display unit and moisture absorbent occurs causing defects
Solution Approach 1:
The problem of contact between components is solved by utilizing the third dimension (vertical spacing between substrates) rather than only horizontal arrangement. The substrates are positioned at different planes with a controlled gap, preventing contact while maintaining overall device compactness.
Solution Approach 2:
The FPC serves as a mediator that enables electrical connection between substrates while maintaining physical separation. This intermediary component allows the substrates to be positioned close together for compactness without risking direct contact between sensitive display elements and moisture absorbent.
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 configuration simplifies the manufacturing process, reduces the likelihood of image quality degradation, and enables the production of lightweight, high-performance organic light emitting display devices by minimizing contact between the display unit and moisture absorbent.
Implementation Method 1
holes supplied from an anode and electrons supplied from a cathode are connected together within the organic emission layer to produce excitons, which are electron-hole pairs. When these excitons transit to a ground state, a certain level of energy is produced, and this energy causes the organic light emitting display device to emit light.
Data Source
AI summary
An organic light emitting display device comprises a first substrate and a second substrate, a display unit formed on the first substrate, and a film disposed between the first substrate and the second substrate and comprising an opening in a region corresponding to the display unit.