Display Sensor Area Layout With Passivation Openings for Light Transmission
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Solution Overview
Problem
Conventional display devices face challenges in increasing display area and adding various functions while maintaining a compact and lightweight design, particularly in integrating sensor areas that require light transmission without compromising the display's performance.
Innovation Solution
A display apparatus with a substrate featuring a display area and a sensor area, where the sensor area includes a transmission portion for light transmission, and a passivation layer with specific hole patterns to cover display devices, allowing for the integration of sensors and improved light transmittance without affecting the display's resolution or durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a sensor area is integrated inside the display area to enhance functionality, then the versatility and functionality of the display apparatus are improved, but the display area is reduced and the structural complexity increases
Solution Approach 1:
The display apparatus is segmented into distinct functional zones: a display area for visual output and a sensor area for sensing functions. This segmentation allows each area to be optimized independently, with the sensor area containing transmission portions that allow light to pass through to sensors while the display area maintains full display functionality.
Solution Approach 2:
Different regions of the display apparatus are assigned different functional qualities. The sensor area has transmission portions with specific optical properties to allow light transmission, while the display area has opaque or semi-transparent properties for light emission. This local differentiation enables both display and sensing functions to coexist without interfering with each other.
2Illumination intensity
If a transmission portion is created in the sensor area to allow light transmission, then the light transmittance is improved, but the structural complexity and manufacturing difficulty increase
Solution Approach 1:
The transmission portions are implemented as vertical penetrations through multiple layers (substrate, pixel electrode, emission layer, opposite electrode, passivation layer) rather than lateral modifications. This dimensional approach allows light to pass through the sensor area from the display side while maintaining the integrity of each layer's other functions.
Solution Approach 2:
The passivation layer with its precisely positioned holes acts as an intermediary structure that allows light transmission while protecting the underlying display devices. The holes in the passivation layer are aligned with transmission portions in lower layers, creating a controlled light path that maintains both optical functionality and device protection.
3Reliability
If display devices are covered by a passivation layer to protect them, then the reliability and durability are improved, but the manufacturing complexity and process steps increase
Solution Approach 1:
The passivation layer is formed early in the manufacturing process, before the display devices are fully assembled and before sensor components are integrated. This preliminary formation of the protective layer with pre-positioned holes simplifies subsequent assembly steps and ensures that protection is in place from the beginning.
Solution Approach 2:
The passivation layer serves multiple functions simultaneously: it protects the display devices from environmental damage, provides structural support, and creates the transmission portions for light passage. By combining these functions into a single layer, the overall device complexity is reduced compared to having separate components for each function.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables the integration of sensors within the display apparatus, enhancing its functionality and light transmittance while maintaining the compactness and reliability of the display device, allowing for improved performance and versatility in applications.
Implementation Method 1
a passivation layer covering the display device group and having a first hole corresponding to the transmission portion
Data Source
AI summary
A display apparatus including a substrate including a display area and a sensor area, the sensor area including a transmission portion that transmits light, a plurality of first display devices arranged in the display area, a display device group including a plurality of second display devices, the display device group being arranged in the sensor area, and a passivation layer covering the display device group and having a first hole corresponding to the transmission portion.