Photoelectric Compound Sensor Integration in Display Panels
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Solution Overview
Problem
Existing display devices face challenges in integrating biometric recognition sensors due to performance degradation when disposed under the display panel and limitations in design and usability when mounted as separate modules, as the required performance and physical properties of the display panel and sensor are often mismatched.
Innovation Solution
A compound represented by Chemical Formula 1 is used to create a sensor-embedded display panel with a photoelectric conversion layer that includes a p-type semiconductor and an n-type semiconductor forming a pn junction, allowing for integration of a light absorption sensor within the display panel, which absorbs and converts light into electrical signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the sensor is disposed under the display panel, then the display device can achieve an integrated structure, but the sensor performance is degraded due to light absorption by the display panel and films
Solution Approach 1:
The patent transitions from a planar arrangement where the sensor is placed beneath the display panel to a three-dimensional stacked structure. The sensor and display panel are positioned in different spatial layers with optimized light paths, allowing the sensor to receive light from specific angles while the display panel emits light in opposite directions, thereby reducing mutual interference and maintaining both integration and performance.
Solution Approach 2:
The sensor module is nested within the display device structure in a space-efficient manner. The sensor is positioned in a recessed area or overlapping region of the display panel, allowing compact integration without significantly increasing the overall device footprint, while maintaining optimal light reception capabilities.
2Measurement precision
If the sensor is manufactured as a separate module and mounted on the outside of the display panel, then the sensor performance is maintained, but the design flexibility and usability are limited
Solution Approach 1:
The sensor module is designed with universal mounting capabilities that allow it to be integrated into various display panel configurations and device types. The standardized interface and flexible positioning options enable the same sensor module to serve multiple functions and be adapted to different form factors, thereby maintaining design flexibility while preserving sensor performance.
3Adaptability or versatility
If a sensor is embedded in the display panel, then design flexibility is improved, but implementation difficulty increases due to mismatched performance and physical properties requirements
Solution Approach 1:
Different regions of the integrated sensor-display structure are optimized with locally tailored properties. The sensor region is designed with specific light absorption characteristics, while the display region is optimized for light emission. This localized optimization allows each component to meet its performance requirements while being part of an integrated structure, reducing implementation difficulty.
Solution Approach 2:
The patent employs composite material structures that combine the sensor layer and display panel layer with intermediate coupling layers. These composite structures are engineered to harmonize the different physical properties and performance requirements of the sensor and display components, facilitating easier integration and manufacturing while maintaining design flexibility.
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 integrated sensor-embedded display panel achieves improved optical and electrical properties, enabling effective biometric recognition without compromising display functionality, and reduces image afterimages in image sensors.
Implementation Method 1
a photoelectric conversion layer between the first electrode and the second electrode and including the compound
Implementation Method 2
a photoelectric conversion layer between the first electrode and the second electrode and including the compound... the compound may be a p-type semiconductor, and the photoelectric conversion layer may further include an n-type semiconductor forming a pn junction with the compound
Data Source
AI summary
A compound represented by Chemical Formula 1, a sensor including the compound, a sensor-embedded display panel including the compound, and an electronic device including the compound.In Chemical Formula 1, X1, X2, X3, Ar1, L1, A, R1, and R2 are the same as in the specification.