Stacked Transparent Image Carriers for High Luminance Contrast HDR Displays
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Solution Overview
Problem
Conventional display mechanisms have limited dynamic range, making it difficult to accurately reproduce real scenes with high dynamic range of radiance for testing image capture devices.
Innovation Solution
A method and apparatus for forming and displaying high dynamic range (HDR) images by capturing multiple raw images of a real scene at different exposure levels, combining them using image processing, and printing onto transparent image carriers to create a display with high luminance contrast, resembling the original scene.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional display mechanisms are used, then device simplicity is maintained, but luminance contrast and dynamic range are limited
Solution Approach 1:
The display device is segmented into multiple transparent image carriers (first, second, and third carriers) stacked together, each carrying a portion of the rendered image. This segmentation allows each carrier to contribute to different luminance levels, achieving high luminance contrast (up to 8500:1) while maintaining relative structural simplicity through the use of multiple discrete layers rather than a single complex display unit.
2Illumination intensity
If multiple transparent image carriers are stacked, then luminance contrast is improved, but device complexity increases
Solution Approach 1:
The patent transitions from a two-dimensional single-layer display to a three-dimensional stacked arrangement of transparent image carriers. By adding the vertical stacking dimension, the system achieves high luminance contrast through multiple layers (first, second, and third carriers) while maintaining operational simplicity. The stacked configuration allows light to pass through multiple carriers, creating the HDR effect without requiring complex internal mechanisms within each individual carrier.
3Measurement precision
If real scenes with high dynamic range are captured, then image fidelity is improved, but accurate reproduction on conventional displays becomes difficult
Solution Approach 1:
The patent creates physical copies of the captured scene through multiple transparent image carriers, each carrying a rendered image at different exposure levels. These carriers are stacked to form a tangible HDR display that replicates the high dynamic range characteristics of the original scene. The copying approach preserves the scene's luminance information across multiple layers, enabling accurate reproduction of real-world illumination conditions that would be lost in conventional single-layer displays.
Data Source
AI summary
Apparatus and method of forming and displaying high dynamic range (HDR) images for various purposes including the testing of image capture devices, such as cameras. A display device has a display panel carrying a plurality of rendered images formed from image data of a scene. At least one light source is used to illuminate the rendered images on the display panel. When the rendered images are aligned with one another and illuminated by the light source, the rendered images are capable of forming a display image having a dynamic range higher than those of the rendered images.