Display Device Transmissive Areas Organic Patterns Spacer
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Solution Overview
Problem
Display devices with embedded cameras face issues of image disconnection in areas overlapped by the camera, and existing solutions for high light transmittance in display panels are limited, particularly during the manufacturing process where protective films can damage the panel.
Innovation Solution
A display device design featuring transmissive and non-transmissive areas with organic patterns on spacers and a capping layer that enhances light transmittance and prevents damage during film removal, including a structure where the second electrode is not deposited on organic patterns to maintain high transmittance and improve manufacturing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a camera is embedded below the display panel to link display area to camera, then the display device can be applied in various applications, but the image displayed on the display device becomes disconnected and is not recognizable by users in areas overlapped with the camera
Solution Approach 1:
The display panel is divided into different regions with different light transmittance properties: a first region with high light transmittance for camera operation, a second region with medium light transmittance for mixed operation, and a third region with low light transmittance for display-only operation. This local differentiation allows the display device to maintain both camera functionality and image continuity.
2Illumination intensity
If the transmissive area has high light transmittance to solve image disconnection, then light transmittance is improved, but the binding force between the capping layer and the underlying structure decreases, causing the capping layer to separate during protective film removal
Solution Approach 1:
The display area is segmented into multiple regions with different light transmittance characteristics. The first region has high light transmittance for camera functionality, while the second and third regions provide structural support and binding. This segmentation allows high light transmittance in specific areas without compromising overall binding strength.
Solution Approach 2:
Different regions of the display panel are assigned different light transmittance properties based on their functional requirements. The first region (high transmittance) is localized to areas where camera operation is needed, while other regions maintain lower transmittance to provide structural integrity and binding force.
3Reliability
If the capping layer is formed to cover the second electrode and organic patterns, then the structure is protected, but the binding force between the capping layer and the underlying structure is insufficient, causing separation during manufacturing
Solution Approach 1:
The display panel structure is segmented into functional regions where the capping layer is selectively positioned. In regions with high light transmittance requirements, the capping layer configuration is optimized to maintain binding force while allowing light transmission. This segmented approach ensures both protection and adequate binding strength.
Data Source
AI summary
A display device includes a substrate having at least two transmissive areas and a non-transmissive area disposed between the at least two transmissive areas; a subpixel in the non-transmissive area, the subpixel including a first electrode, a light emitting layer, and a second electrode; at least two spacers each in respective ones of the at least two transmissive areas; and at least two organic patterns on upper surfaces of respective ones of the at least two spacers.