Display Sensor Area Light Transmittance via Electrode Segmentation
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Solution Overview
Problem
Existing display apparatuses lack an efficient integration of sensor areas with display areas, leading to suboptimal light transmittance and functionality in areas where sensors are integrated.
Innovation Solution
A display apparatus is designed with a substrate that includes both a display area with main pixels and a sensor area with auxiliary pixels and a transmission portion. The apparatus features a metal layer surrounding the transmission portion, an opposite electrode with an opening corresponding to the transmission portion, and a functional layer with openings that overlap with the opposite electrode to form a through hole.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a sensor area is integrated into the display area, then the functionality of the display apparatus is improved, but the light transmittance in the sensor area deteriorates
Solution Approach 1:
The sensor area is segmented into distinct regions: a transmission portion with high light transmittance for sensor component visibility, and auxiliary pixel portions for display functionality. This segmentation allows different areas to serve different optical functions simultaneously, resolving the contradiction between sensor functionality and light transmittance.
Solution Approach 2:
Different regions within the sensor area are assigned different properties: the transmission portion is optimized for high light transmittance to enable sensor components to be visible through the display panel, while the auxiliary pixel portions maintain display functionality. This local differentiation allows the sensor area to simultaneously support both sensor operations and display functions.
2Reliability
If the opposite electrode covers the entire sensor area, then the electrical connection is improved, but the light transmittance in the transmission portion deteriorates
Solution Approach 1:
The opposite electrode is segmented to exclude the transmission portion from its coverage, creating an opening in the electrode pattern. This allows light to pass through the transmission portion while the electrode maintains electrical connection in the auxiliary pixel areas, resolving the contradiction between electrical connectivity and optical transmittance.
Solution Approach 2:
The transmission portion is extracted from the opposite electrode coverage area, creating a dedicated opening in the electrode structure. This extraction ensures that the transmission portion remains optically clear for sensor visibility while the electrode provides necessary electrical connections in other sensor area regions.
3Illumination intensity
If the metal layer is added to surround the transmission portion, then the light transmittance is improved, but the device complexity increases
Solution Approach 1:
The metal layer is merged with the electrode structure, forming an integrated pattern where the metal layer defines the boundaries of the transmission portion and overlaps with the opening in the opposite electrode. This merging approach enhances light transmittance while minimizing additional structural complexity by combining multiple functions into a unified structure.
Data Source
AI summary
A display apparatus includes a substrate including a display area and a sensor area, the display area including main pixels and the sensor area including auxiliary pixels and a transmission portion; a first pixel electrode and a first emission layer in each of the main pixels; a second pixel electrode and a second emission layer in each of the auxiliary pixels; an opposite electrode integrally arranged in the display area and the sensor area; and a metal layer at least partially surrounding the transmission portion, wherein the opposite electrode has an opening corresponding to the transmission portion.