Sensor Switch and Display Electrode Integration
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Solution Overview
Problem
The integration of sensors and electronic displays is limited due to interference issues, where sensor components can obstruct the user's view and complicate the combination of capacitive touch sensors with certain display types, affecting display quality and sensor sensitivity.
Innovation Solution
An integrated system is designed with a display and sensor configuration where the sensor electrodes are positioned to minimize interference with the light emission path, allowing at least 50% of the light emission path to be unobstructed by non-transparent sensor components, and using a higher density of electrodes for fingerprint detection to enhance sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sensor components are disposed above the electronic display to integrate sensor and display functionality, then both sensor and display functionality are provided in an integrated system, but the sensor components may obstruct the user's view and interfere with display quality
Solution Approach 1:
The patent positions sensor components in the vertical dimension above the display plane, allowing light to pass through the display to the sensor in the Z-direction while maintaining separate functional layers. This spatial arrangement in another dimension enables both display and sensor functionality without mutual obstruction.
Solution Approach 2:
The patent divides the system into distinct functional layers: display components (electrodes, light emission layer) and sensor components (sensor electrodes, switches) positioned at different vertical levels. This segmentation allows each component to perform its function independently while coexisting in an integrated structure.
2Reliability
If sensor components are made nontransparent to improve sensor functionality, then sensor sensitivity is enhanced, but the obstruction of light emission path increases and display quality deteriorates
Solution Approach 1:
The patent resolves this contradiction by moving nontransparent sensor components to the vertical dimension above the display. The light emission path remains unobstructed in the horizontal plane, while sensor components are positioned above to detect touch inputs without blocking light emission, achieving both sensor sensitivity and display quality.
Solution Approach 2:
The patent applies different transparency properties to different regions and layers: display components maintain transparency for light emission, while sensor components above can be nontransparent without affecting display quality. Each layer has optimized local properties suitable for its specific function.
3Adaptability or versatility
If capacitive touch sensors are combined with certain types of displays, then integrated functionality is achieved, but display components may interfere with the capacitive sensing of the touch sensor
Solution Approach 1:
The patent positions capacitive sensor components in the vertical dimension above the display components, separating the electromagnetic fields used for capacitive sensing from the display components. This spatial separation in another dimension reduces interference between display components and capacitive sensing, maintaining sensing precision while achieving integration.
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 system achieves effective detection of user presence and fingerprint details without compromising display quality or sensor sensitivity, ensuring both functionalities work seamlessly together.
Implementation Method 1
The light emission layer may be disposed between the first display electrode and the second display electrode, and the first display electrode and the second display electrode may be configured to apply a voltage to the light emission layer
Implementation Method 2
the sensor may be configured to sense electrical characteristics of an object in order to sense presence or location of an object near or about the sensor
Data Source
AI summary
System for display and presence detection are described. In some embodiments, a system may include a display and a sensor. The sensor may include a display switch, first and second display electrodes, and a light emission layer. The sensor may include a sensor switch, a sensor electrode, and an analog front end. The system may further include an external surface configured to transmit light emitted by the light emission layer toward a user.