Sensor-Embedded Display Panel With Wavelength-Selective Photoelectric Layer
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Solution Overview
Problem
Existing display devices face challenges in integrating biometric sensors effectively due to differences in performance and physical properties between sensors and display panels, leading to degraded performance and design limitations when sensors are either embedded or mounted as separate modules.
Innovation Solution
A compound represented by Chemical Formula 1 is used in a sensor-embedded display panel, forming a photoelectric conversion layer with a pn junction, which includes a p-type semiconductor and an n-type semiconductor, allowing for improved optical and electrical characteristics and integration of biometric recognition functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sensor is disposed under the display panel, then the display device can achieve biometric recognition function, but the recognition performance is degraded due to light absorption by multiple layers
Solution Approach 1:
The patent merges the sensor and display panel into an integrated structure where the sensor is embedded within the display panel layers. The sensor comprises a photoelectric conversion layer with organic compound that selectively absorbs light at specific wavelengths, allowing biometric recognition while minimizing interference from display layers through wavelength-selective detection
Solution Approach 2:
The patent applies local quality by designing the photoelectric conversion layer with specific organic compounds that have tailored light absorption characteristics for particular wavelength regions. This allows the sensor to selectively detect biometric information at wavelengths that penetrate the display panel while ignoring wavelengths absorbed by display layers
2Measurement precision
If the sensor is manufactured as a separate module and mounted on the outside of the display panel, then the sensor performance can be maintained, but design flexibility and usability are limited
Solution Approach 1:
The patent combines the sensor module with the display panel into a single integrated structure. The sensor is embedded within the display panel's layered structure, sharing common substrates and manufacturing processes, which maintains sensor performance while enabling flexible device design and improved usability
3Adaptability or versatility
If the sensor is embedded in the display panel, then design flexibility and usability are improved, but it is difficult to implement due to conflicting performance and physical property requirements
Solution Approach 1:
The patent employs parameter changes by selecting organic compounds with specific molecular structures that exhibit selective light absorption in particular wavelength regions. By adjusting the molecular structure and optical properties of the photoelectric conversion layer, the sensor can operate at wavelengths that penetrate display panels, resolving the conflict between display and sensor performance requirements
Solution Approach 2:
The patent uses composite materials by combining organic photoelectric conversion compounds with the display panel's existing layered structure. The sensor comprises multiple layers including organic compounds, electrodes, and encapsulation layers that are integrated with the display panel's TFT and color filter layers, creating a unified structure that satisfies both display and sensor requirements
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 enhanced biometric recognition capabilities with improved light absorption and electrical signal conversion, addressing the integration challenges and performance degradation issues in existing technologies.
Implementation Method 1
the optical type sensor is a sensor configured to absorb light and convert the absorbed light into an electrical signal
Implementation Method 2
The organic material has a large extinction coefficient and may be configured to selectively absorb light in a specific wavelength region according to a molecular structure
Data Source
AI summary
Disclosed are a compound represented by Chemical Formula 1, a sensor including the compound, a sensor-embedded display panel, and an electronic device.In Chemical Formula 1, X1, A, and R1 to R5 are as described in the specification.