Segmented LED Array for Integrated Chroma Key and Ambient Lighting
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Solution Overview
Problem
Existing chroma key techniques require LED arrays to be out of the camera's field of vision to ensure effective post-production processing, limiting their integration and use in video production.
Innovation Solution
A light control apparatus that includes a lighting device with a viewed and unviewed portion, controlled by a light control circuit to manage a controlled lighting sequence, allowing for the integration of chroma key and incident lighting within the camera's field of vision, using LED arrays and projectors to display specific light profiles and emit infrared light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If LED arrays are placed within the camera's field of vision for integrated lighting control, then lighting flexibility and integration are improved, but post-production processing effectiveness deteriorates
Solution Approach 1:
The LED array is divided into multiple independently controllable segments or zones. This allows different portions of the LED array to display different colors or patterns - specifically, the chroma key portion can emit the required solid color while other portions can emit ambient or incident lighting, enabling both functions to coexist within the same field of view without interfering with post-production processing
Solution Approach 2:
Different regions of the LED array are assigned different functional qualities - some regions are dedicated to chroma key lighting (emitting solid green or blue), while other regions provide ambient or incident lighting. This local differentiation allows the system to maintain effective chroma key areas for post-production while simultaneously providing realistic lighting in other areas within the camera's field of vision
2Adaptability or versatility
If LED arrays emit the same color as chroma key background, then integrated lighting is achieved, but chroma key replacement effectiveness deteriorates
Solution Approach 1:
The LED array is segmented into distinct functional zones where chroma key LEDs emit only the required solid color (green or blue) while other segments emit different colors for ambient or incident lighting. This spatial segmentation ensures that chroma key areas maintain their color purity for effective replacement while other areas provide supplemental lighting
Solution Approach 2:
Specific local regions of the LED array are optimized for chroma key functionality with precise color control, while other local regions are optimized for ambient or incident lighting with different color characteristics. This local quality differentiation maintains chroma key replacement effectiveness in designated areas while providing integrated lighting control overall
3Device complexity
If multiple lighting functions are combined in single LED array, then device complexity is reduced, but control precision deteriorates
Solution Approach 1:
The LED array is organized into separately controllable segments that can be independently addressed and controlled. This segmentation allows the system to maintain relatively simple hardware architecture while enabling precise control over different lighting functions (chroma key, ambient, incident) through software or control signals assigned to specific segments
Solution Approach 2:
A single LED array system is designed to perform multiple lighting functions simultaneously - chroma key lighting, ambient lighting, and incident lighting - all through one unified device. This multi-functionality reduces the need for multiple separate lighting systems while maintaining control precision through dedicated control channels or zones for each function
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
Enables the capture of images using both chroma key and ambient/incident lighting simultaneously, allowing for more flexible and integrated lighting control in video production, enhancing the ability to create composite images with accurate lighting profiles.
Implementation Method 1
In various aspects, the light control apparatus can operate such that at least the viewed portion of the lighting device displays a chroma key color and/or emit infrared light.
Implementation Method 2
In various aspects, the lighting device can include an LED array and/or a projector.
Data Source
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AI summary
Various embodiments relate to an apparatus for controlling a lighting device. A light control circuit can use a controlled lighting sequence control and drive viewed sections of a lighting device to display chroma key color or emit infrared light, while driving other unviewed portions of the lighting device to display ambient and incident lighting. The viewed and unviewed lighting sections can be based on the field of vision of an image capture device and can change in relation to movements of the image capture device. A sensor can make measurements to determine the field of vision of the image capture device and can be used to generate or modify the controlled lighting sequence. An image processing circuit can generate a composite image using the chroma key while maintaining the subjects that are captured using ambient and incident lighting.