Transparent Display Substrate with Varying Thickness
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Solution Overview
Problem
Existing transparent display devices, such as OLEDs, face challenges in achieving high transmittance due to the complexity of substrate composition and layer thickness, which affects their transparency and efficiency.
Innovation Solution
A transparent display substrate with a base substrate having a pixel area and a transmission area of varying thickness, where the transmission area is thinner, featuring a pixel circuit covered by an insulation structure with openings or concave portions, and a pixel electrode extending through the insulation structure for improved electrical connection and light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the base substrate thickness is reduced at the transmission area to improve transmittance, then light transmission is enhanced, but structural strength and stability may be compromised
Solution Approach 1:
The base substrate is designed with non-uniform thickness, being thinner at the transmission area and thicker at the pixel area. This local variation in thickness allows the transmission area to have high transmittance while the pixel area maintains sufficient structural strength, resolving the contradiction between light transmission and substrate strength.
2Adaptability or versatility
If multiple insulating layers and conductive layers are added to achieve display functionality, then device functionality is improved, but transmittance is reduced
Solution Approach 1:
The display device is segmented into distinct functional areas: a pixel area containing the pixel circuit and display elements, and a transmission area where insulating layers are removed or thinned. This segmentation allows the pixel area to provide full display functionality while the transmission area maintains high transmittance by minimizing light-blocking layers.
Solution Approach 2:
Different regions of the substrate have different layer configurations. The transmission area has reduced or removed insulating layers to maximize light transmission, while the pixel area maintains the full stack of insulating and conductive layers necessary for display operation. This local differentiation resolves the contradiction between functionality and transmittance.
Data Source
AI summary
A transparent display substrate including a base substrate having a pixel area and a transmission area, a thickness of the base substrate at the transmission area being less than a thickness of the base substrate at the pixel area, a pixel circuit at the pixel area of the base substrate, an insulation structure covering the pixel circuit, the insulation structure having an opening or a concave portion at the transmission area of the base substrate, and a pixel electrode at the pixel area of the base substrate and extending at least partially through the insulation structure to be electrically connected to the pixel circuit.