Winding OLED Display Protection Film for Accurate Luminance Reading
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Solution Overview
Problem
Dust adhering to the light-emitting face of OLED displays interferes with accurate luminance measurement, preventing appropriate correction of data signals to display elements.
Innovation Solution
A winding-type display device with a flexible light-emitting device, a protection film, a roller, and an image reading sensor is used to detect light emission information by peeling and reattaching a protection film over the light-emitting face, ensuring accurate reading without dust interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the light-emitting face of the OLED display is exposed during use, then the display can be viewed and operated, but dust adheres to the light-emitting face causing inaccurate luminance measurement
Solution Approach 1:
A protection film is attached to the light-emitting face before use to prevent dust adhesion. During measurement, the film is temporarily peeled off to allow accurate luminance reading, then reattached. This preliminary protective action resolves the contradiction by preparing the surface in advance for both operation and measurement needs.
Solution Approach 2:
The protection film acts as an intermediary between the light-emitting face and the environment. It can be selectively removed during measurement to allow accurate detection while maintaining protection during normal operation, thus mediating between the conflicting requirements of accessibility and measurement accuracy.
2Reliability
If a protection film is attached to the light-emitting face, then dust adhesion is prevented, but the film must be peeled and reattached during measurement causing operational interruption
Solution Approach 1:
The protection film is periodically removed and reattached based on measurement requirements. During normal operation, the film remains attached for protection. When measurement is needed, it is temporarily removed and then reattached, creating a periodic cycle of protection and measurement that balances both requirements.
3Adaptability or versatility
If the display is made flexible and winding-capable, then the device gains portability and storage advantages, but the light-emitting face becomes more vulnerable to dust and damage
Solution Approach 1:
A flexible protection film matching the light-emitting face is used that can be easily attached and detached without damaging the flexible display. This thin film provides dust protection while allowing the display to maintain its winding capability and flexibility, resolving the contradiction between adaptability and protection.
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 allows for appropriate correction of data signals to each pixel, maintaining display quality by preventing dust contact and enabling accurate light emission information detection.
Implementation Method 1
an image reading sensor configured to detect light emission information from the light-emitting face of the light-emitting device
Data Source
AI summary
A winding-type display device includes a flexible display having a third surface, a protection film configured to be attached to the third surface, a winding roller for winding the display with the protection film outside, a first guide member for winding the protection film peeled from the display, and an image reading sensor disposed between the first guide member and the winding roller for detecting light emission information from the display.