Video Displayer Image Freezing Detection Using Reflected Pixel Light
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Solution Overview
Problem
Current video displayers, particularly in the automotive industry, fail to effectively detect image freezing issues in video feeds from cameras, such as rear-view cameras, which can lead to incorrect image representation.
Innovation Solution
A video displayer with a multi-layer display panel, including a pixel generator layer, light reflector, and light sensor, where the light reflector reflects pixel light towards the pixel generator layer, and the light sensor detects light variations to determine image freezing by comparing sensed light with predefined thresholds or patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional video displayers are used without specialized detection components, then the device complexity is low, but the ability to detect image freezing is insufficient
Solution Approach 1:
The light sensor is integrated within the multi-layer display panel structure, nested between the pixel generator layer and the rear polarization layer. This nesting approach allows the detection function to be embedded within the existing display structure, improving detection accuracy while minimizing additional complexity
Solution Approach 2:
The light sensor serves dual purposes: it detects light variations for image freezing detection and also monitors the actual light output of the pixel generator layer. This multi-functionality improves detection capability without proportionally increasing system complexity
2Measurement precision
If static image detection methods are used, then the detection method is simple, but the detection accuracy in monotonous scenarios is insufficient
Solution Approach 1:
The system generates dynamic test patterns that change over time, allowing the detection method to adapt to different display scenarios. This dynamic approach improves detection accuracy in monotonous scenarios where static images would fail to show variations
Solution Approach 2:
The control unit periodically generates test patterns with known light variations at specific pixel locations. This periodic injection of dynamic content allows the system to detect image freezing by comparing expected periodic variations with actual sensor readings
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 solution enables accurate detection of image freezing even in monotonous scenarios, ensuring reliable image representation by generating dynamic patterns that highlight detectable differences, thus preventing frozen image issues in video displays.
Implementation Method 1
The light reflector is arranged in the plurality of layers in such a way that, in use, the light reflector reflects pixel light from the pixel generator layer in a reflexion direction towards the pixel generator layer
Implementation Method 2
The light sensor is arranged in such a way that, in use, the light sensor receives the reflected pixel light at a receiving location and senses light variations in the received reflected pixel light
Data Source
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AI summary
Video displayers are provided for detecting image freezing in a video displayer with a multi-layer panel including a front layer and a pixel layer emitting pixel light in emitting direction towards the front layer. Front layer and pixel layer are configured to let light through. Video displayers further include a light reflector arranged in the multi-layer panel between pixel layer and front layer to reflect the pixel light from pixel layer in reflexion direction towards pixel layer; a light sensor arranged to receive the reflected pixel light at receiving location and sense light variations in received reflected pixel light; and a control unit to receive light variations sensed by light sensor and to detect image freezing depending on received sensed light variations. Methods and computer programs implementing such methods are also provided which are performable by proposed video displayers.