Pixel Defining Layer Alignment for Transmissive Area Light Transmission
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Solution Overview
Problem
Display devices face challenges in recognizing external light without reducing the area used for emitting light, particularly in incorporating functional modules like cameras, which requires an efficient light transmission mechanism without compromising the display area.
Innovation Solution
The display device incorporates a substrate with a first and second display area, a transmissive area, and a conductive layer, where the pixel defining layer and conductive layer are aligned or protrude into the transmissive area to prevent light interference, allowing for improved light transmission while maintaining the display's light-emitting functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a transmissive area is formed to allow light recognition by functional modules, then light transmission capability is improved, but the display area is reduced
Solution Approach 1:
The pixel defining layer is configured with different properties in different regions: in the second display area, it aligns with the conductive layer to block light and maintain display function, while in the transmissive area, it allows light to pass through to enable functional module operation. This local differentiation resolves the contradiction between light transmission and display area maintenance.
2Reliability
If the pixel defining layer is extended into the transmissive area to block light interference, then display functionality is maintained, but light transmission in the transmissive area is reduced
Solution Approach 1:
The pixel defining layer protrudes into the transmissive area by a controlled, minimal distance (no more than about 2 micrometers). This partial extension is sufficient to block light interference for display reliability while minimizing the impact on light transmission capability of the transmissive area.
3Illumination intensity
If the end of the pixel defining layer is spaced apart from the transmissive area, then light transmission is improved, but light interference from the second display area increases
Solution Approach 1:
The pixel defining layer extends slightly into the transmissive area (no more than about 2 micrometers) to provide just enough light blocking to prevent interference from the second display area, while maintaining adequate light transmission for functional module operation. This partial extension optimizes the balance between preventing harmful light interference and maintaining light transmission.
Data Source
AI summary
A display device is disclosed that includes a substrate, a conductive layer, and a pixel defining layer. The substrate includes a first display area including pixels, a second display area including the pixels, and a transmissive area formed between the pixels of the second display area. The conductive layer is disposed in the second display area outside of the transmissive area. The pixel defining layer overlaps the conductive layer and is disposed such that an end of the pixel defining layer adjacent to the transmissive area is substantially aligned with an end of the conductive layer adjacent to the transmissive area.