Transparent Sensor Light Guide for Medical Display Measurement
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Solution Overview
Problem
Current display sensor systems for medical imaging applications are inadequate for real-time measurements, as they either suffer from low signal-to-noise ratio or disturb the display image due to ambient light sensitivity and light spreading issues.
Innovation Solution
A display device with at least partially transparent sensors located within the viewing angle, utilizing organic photoconductors and transparent electrodes, and an optical coupling device with a light guide and incoupling member that couples light into the guide without constraining the view, allowing for real-time measurements with high signal-to-noise ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor is placed in front of the display area to detect light properties, then real-time measurement capability is improved, but the display image quality deteriorates due to light blocking and disturbance
Solution Approach 1:
The sensor is made at least partially transparent specifically at the region where it is located in front of the display area, while maintaining full sensing capability. This allows the sensor to perform real-time measurements without significantly blocking light from the display pixels behind it, thus resolving the contradiction between measurement capability and image quality.
2Reliability
If a light guide is used to guide light to a sensor outside the viewing angle, then ambient light interference is reduced, but the device complexity increases
Solution Approach 1:
The sensor is extracted from the main viewing area and placed at a location outside the viewing angle, where it can detect light properties without being exposed to ambient light interference. The at least partially transparent construction allows this extraction without requiring complex light guiding structures, thus improving signal-to-noise ratio while minimizing added complexity.
3Illumination intensity
If a transparent sensor is used to minimize light blocking, then display image quality is maintained, but the signal to noise ratio deteriorates due to ambient light sensitivity
Solution Approach 1:
The sensor exhibits different optical properties at different locations: at the sensing region it is transparent to maintain display image quality, while at the detection region outside the viewing angle it provides effective light detection. This spatial variation in optical characteristics resolves the contradiction between maintaining image quality and achieving good signal-to-noise ratio.
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 real-time detection of light properties like luminance and color without disturbing the display image, providing high signal-to-noise ratio and improved image quality for medical imaging applications.
Implementation Method 1
utilizing organic photoconductors and transparent electrodes
Implementation Method 2
an optical coupling device with a light guide and incoupling member that couples light into the guide
Data Source
AI summary
The display device has a sensor system with at least one sensor for detecting the intensity or color of light emitted from at least one display area of the display device into the viewing angle of the display device. The sensor system further has in one embodiment an at least partially transparent sensor. The sensor system has in another embodiment at least one optical coupling device including a light guide member and a incoupling member for guiding or directing, e.g. deflecting, reflecting, bending, scattering, diffracting, at least one part of the light emitted from the display area to the corresponding sensor, where the sensor is located outside or at least partially outside the viewing angle of the display device.