Display Assembly Photosensitive Device Parasitic Capacitance
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Solution Overview
Problem
The integration of visible light photosensitive sensors in display assemblies generates parasitic capacitance with wires in the display area, degrading the display effect.
Innovation Solution
The photosensitive device is disposed on the package substrate, generating optical signals from reflected light and converting them into electric signals for recognition without generating parasitic capacitance with the array substrate wires, thereby improving the display effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the visible light photosensitive sensor is integrated in the array substrate to enable fingerprint recognition function, then the security of the display apparatus is improved, but parasitic capacitance is generated between the sensor and wires, degrading the display effect
Solution Approach 1:
The patent divides the sensor system into two separate substrates: the array substrate for display functions and the package substrate for sensor functions. This segmentation eliminates the parasitic capacitance problem by physically separating the photosensitive sensor from the display wires while maintaining independent functionality of both components.
Solution Approach 2:
The patent introduces a package substrate as an intermediary carrier for the photosensitive sensor. This intermediary substrate acts as a buffer between the sensor and the array substrate, allowing the sensor to be mounted away from the display area wires, thus eliminating parasitic capacitance while still enabling fingerprint recognition functionality.
2Reliability
If the password is made complicated to improve security, then the security of the display apparatus is improved, but it becomes hard for the user to remember
Solution Approach 1:
The patent replaces the mechanical/password-based authentication system with a biometric recognition system using the photosensitive sensor for fingerprint identification. This substitution eliminates the need for users to remember complex passwords while maintaining high security levels through physiological特征 recognition.
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
This configuration enhances the display effect by eliminating parasitic capacitance and improving recognition accuracy, particularly in OLED display assemblies.
Implementation Method 1
the photosensitive device may generate an optical signal according to the received light reflected by the object to be recognized, and convert the generated optical signal into an electric signal for recognizing the object to be recognized
Data Source
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AI summary
A display assembly includes an array substrate (200), a package substrate (300) adhered to the array substrate (200), and a photosensitive device (400); wherein the array substrate (200) includes a pixel unit for emitting light to an object (110) to be recognized on a displaying side of the display assembly; and the photosensitive device (400) is provided on the package substrate (300) for generating an optical signal based on received light reflected by the object (110) to be recognized and converting the generated optical signal into an electric signal for recognizing the object (110) to be recognized.