Transmissive Display Device with Composite Substrate and Opening Area
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Solution Overview
Problem
Current display devices face challenges in increasing light or sound transmittance while maintaining image display functionality, particularly in thinner and lighter designs, where the integration of various functions and improved transmittance is hindered by structural limitations.
Innovation Solution
A display device design featuring a transmissive display area with a substrate having pixel areas and an opening area, a light-emitting element layer, and encapsulation layers that extend across the substrate opening portion, along with insulating and protective layers, to enhance light or sound transmittance and support multiple functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the display device is made thinner and lighter, then the portability and modern design are improved, but the structural support and functional integration become more difficult
Solution Approach 1:
The substrate is constructed as a composite structure comprising a lower substrate and an upper substrate made of different materials. The lower substrate provides mechanical support while the upper substrate enables transmissive display functionality. This composite approach allows the device to be thinner and lighter while maintaining structural integrity and supporting multiple functions.
2Illumination intensity
If the transmissive display area is enlarged, then the light and sound transmittance are improved, but the structural support and device reliability may be compromised
Solution Approach 1:
The display area is segmented into pixel areas and opening areas. The opening areas are regions where the upper substrate is removed or not formed, creating transparent regions that allow light and sound to pass through. This segmentation enables high transmittance in specific regions while maintaining the structural integrity of the overall device through the remaining substrate portions.
Solution Approach 2:
Different regions of the display device have different structural properties. The pixel areas have complete substrate structure for device reliability, while the opening areas have removed or reduced substrate for high light and sound transmittance. This local differentiation of structural quality allows the device to simultaneously achieve both high transmittance and structural reliability.
3Adaptability or versatility
If various functions are integrated into the display device, then the versatility and functionality are improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The opening areas in the transmissive display region serve multiple functions: they allow light transmission for display visibility, permit sound transmission for audio output, and provide space for additional functional components. This multi-functionality is achieved through a single structural design feature, reducing overall device complexity while enhancing versatility.
4Illumination intensity
If the opening area is increased for higher transmittance, then the light and sound transmission are improved, but the structural strength and encapsulation reliability may be reduced
Solution Approach 1:
The composite substrate structure with lower and upper substrates provides enhanced structural strength compared to a single thin substrate. The lower substrate serves as a robust support layer, allowing the opening areas to be larger for high transmittance while the overall composite structure maintains sufficient mechanical strength and reliability.
Data Source
AI summary
A display device and a method of manufacturing the display device are provided. The display device includes a substrate including a transmissive display area including a first pixel area, a second pixel area, and an opening area between the first pixel area and the second pixel area and defining a substrate opening portion, a light-emitting element layer above the substrate and including a first light-emitting element in the first pixel area and a second light-emitting element in the second pixel area, and a first inorganic encapsulation layer above the light-emitting element layer and extending from the first pixel area to the second pixel area across the substrate opening portion.