Blocking Structure for Display Device Optical Noise Reduction
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Solution Overview
Problem
Current display devices with biological feature recognition capabilities face challenges in increasing signal accuracy while minimizing power consumption and reducing noise interference from non-collimated light sources, which can lead to erroneous recognition.
Innovation Solution
A blocking structure is integrated into the display device with a first opening corresponding to the sensing element, designed to block or reflect most non-collimated incident light, thereby reducing noise light detection and enhancing the accuracy of biological feature recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the intensity or quantity of light sources is increased to improve detector sensitivity for biological feature recognition, then the sensitivity increases, but power consumption increases
Solution Approach 1:
The patent applies local quality by creating a specialized optical path through the opening structure that selectively allows collimated light to reach the detector while blocking non-collimated light. This localized optical design improves detector sensitivity for the desired signal without requiring increased light source intensity, thereby avoiding additional power consumption.
Solution Approach 2:
The opening structure acts as an intermediary element between the light source and detector. It mediates the optical path by allowing only collimated light to pass through while blocking non-collimated light, enabling the detector to achieve high sensitivity without requiring increased light source intensity or power consumption.
2Measurement precision
If detector sensitivity is increased to improve biological feature recognition, then recognition accuracy improves, but the detector becomes more vulnerable to noise interference from non-collimated light
Solution Approach 1:
The opening structure creates a localized optical path that selectively transmits collimated light while blocking non-collimated light. This spatial differentiation allows the detector to maintain high sensitivity to the desired signal while being protected from noise interference, resolving the contradiction between sensitivity and noise vulnerability.
Solution Approach 2:
The patent converts the potentially harmful effect of non-collimated light into a beneficial filtering mechanism. The opening structure is designed to exploit the angular characteristics of light, allowing only the desired collimated light to pass while blocking non-collimated noise, thus turning what could be interference into a selective filtering advantage.
3Illumination intensity
If non-collimated light sources are used to improve illumination, then illumination coverage increases, but recognition accuracy decreases due to interference
Solution Approach 1:
The opening structure implements local quality control in the optical path, creating a selective transmission zone that only accepts collimated light at specific angles. This allows the system to use extended light sources for broad illumination coverage while the opening structure locally filters the light to ensure only the useful collimated portion reaches the detector, maintaining high recognition accuracy.
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 blocking structure effectively increases the accuracy of biological feature recognition by reducing the detection of non-collimated light, improving the sensitivity and reliability of the sensing element while maintaining low power consumption.
Implementation Method 1
The blocking structure may block or reflect most of the non-collimated incident light to reduce the non-collimated incident light from being detected by the sensing element
Implementation Method 2
The blocking structure may block or reflect most of the non-collimated incident light to reduce the non-collimated incident light from being detected by the sensing element
Data Source
AI summary
A display device including a first substrate, a sensing element, a display switch element and a blocking structure is provided. The first substrate has a first top surface perpendicular to a first direction. The sensing element is disposed on the first substrate and includes an active layer having a channel region. A first distance is formed between a channel top surface of the channel region and the first top surface of the first substrate along the first direction. The display switch element is disposed on the first substrate and adjacent to the sensing element. The blocking structure is disposed on the sensing element. The blocking structure has a bottom surface and a first opening, the first opening corresponding to the channel region of the sensing element. A second distance, greater than the first distance, is formed between the bottom surface and the first top surface along the first direction.