Flat Panel Detector Near-Infrared Detection Sensitivity
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Solution Overview
Problem
Existing display panel technologies face challenges in improving near-infrared light detection sensitivity while maintaining display efficiency, and they require additional process developments that affect yield and integration complexity, with strong near-infrared laser light sources posing safety risks.
Innovation Solution
A flat panel detector is designed with a base substrate and detection regions that include a photosensitive sensor and an optical structure. The optical structure consists of a condensing unit and a light filtering unit, which concentrate and filter near-infrared light, respectively, enhancing detection sensitivity and safety while minimizing impact on display efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an up-conversion material and metal oxide transistor are used to convert near-infrared light into ultraviolet light for interaction positioning, then the detection sensitivity of near-infrared light is improved, but the display efficiency is reduced and additional process development is required
Solution Approach 1:
The patent extracts the near-infrared detection function from the display panel by using a separate flat panel detector positioned behind the display panel. This allows the display panel to maintain its original display efficiency while the detector independently handles near-infrared detection, eliminating the need to modify the display panel's light conversion and transistor structures.
Solution Approach 2:
The patent introduces a flat panel detector as an intermediary component between the near-infrared light source and the display panel. This detector captures near-infrared light through the display panel's backlight without requiring the display panel itself to convert or process the near-infrared light, thus preserving display efficiency while enabling detection functionality.
2Measurement precision
If an existing display panel process is adjusted and changed to improve near-infrared light detection sensitivity, then the detection sensitivity is improved, but the manufacturing complexity increases and yield is affected
Solution Approach 1:
The patent segments the detection function from the display function by using a separate flat panel detector. This allows the display panel manufacturing process to remain unchanged while the detector is independently manufactured and integrated, avoiding the need to adjust and redevelop the display panel's fabrication processes.
Solution Approach 2:
The flat panel detector serves as an intermediary that performs near-infrared detection without requiring modifications to the display panel's manufacturing process. The detector is positioned behind the display panel and captures light through the existing backlight structure, eliminating the need for process adjustments in the display panel fabrication.
3Measurement precision
If a strong near-infrared laser light source is used to improve detection sensitivity, then the detection sensitivity is improved, but security risks increase
Solution Approach 1:
The flat panel detector acts as an intermediary that safely captures near-infrared light through the display panel's backlight structure. By positioning the detector behind the display panel and using the existing backlight as a light guide, the system can detect near-infrared light without requiring strong laser sources that pose security risks.
Solution Approach 2:
The patent changes the detection approach by using the display panel's backlight as a light guide to transmit near-infrared light to the detector, rather than using strong external laser sources. This parameter change in the light delivery method maintains detection sensitivity while eliminating the security risks associated with strong laser light sources.
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 improves near-infrared light detection sensitivity and safety by concentrating and filtering the light, while maintaining high transmittance and reducing the complexity of integrating the flat panel detector with display modules, thus enhancing overall performance and safety.
Implementation Method 1
the condensing unit is used for receiving near-infrared light emitted by a laser light source and ambient light and performing light condensing
Implementation Method 2
the light filtering unit is configured to shield the ambient light and transmitting the near-infrared light
Implementation Method 3
the amorphous silicon photodiode is configured to convert the near-infrared light transmitted by the light filtering unit into an electrical signal
Data Source
AI summary
A flat panel detector is provided, which includes a base substrate and a plurality of detection regions arranged in an array on the base substrate, where each detection region is successively provided with a photosensitive sensor and an optical structure along a direction away from the base substrate; the optical structure includes a condensing unit and a light filtering unit, where the condensing unit is used for receiving the near-infrared light and ambient light emitted by the laser light source and performing condensing, and the light filtering unit is configured to shield the ambient light and transmitting the near-infrared light; a photosensitive sensor which includes an amorphous silicon photodiode and a thin film transistor, where the amorphous silicon photodiode is configured to convert the near-infrared light transmitted by the light filtering unit into an electrical signal.