Dual Display Device Using Retinex Image Splitting for Dynamic Range
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Solution Overview
Problem
Conventional dual display devices have insufficient dynamic range and high power consumption, limiting their ability to replicate real-world image perception and creating parallax errors due to inadequate light intensity variation and power management.
Innovation Solution
The dual display device employs a retinex algorithm to split the input image into an illumination image and a reflection image, with the illumination image being displayed on a lower-resolution backlight unit, reducing power dissipation and enhancing viewing angle characteristics by smoothing light intensity values, thereby reducing parallax errors and increasing the dynamic range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the input image is displayed using a conventional single display device, then the device structure is simple, but the dynamic range is insufficient and power consumption is high
Solution Approach 1:
The display device is segmented into two separate displays: a first display for displaying the original image and a second display for displaying the high dynamic range image. This segmentation allows each display to be optimized for its specific function, with the second display operating at lower resolution and lower power consumption while the first display maintains full resolution and performance.
2Illumination intensity
If a dual display system is used to increase dynamic range, then the dynamic range is improved, but power consumption increases
Solution Approach 1:
The second display operating at lower resolution and lower power consumption is positioned specifically for high dynamic range imaging, while the first display maintains full resolution for standard imaging. This local quality differentiation allows the system to achieve extended dynamic range without proportionally increasing overall power consumption.
Solution Approach 2:
The second display operates at reduced resolution and power consumption levels, providing partial imaging functionality focused specifically on high dynamic range regions. This partial action approach allows the system to achieve HDR capability without requiring the second display to operate at full power and resolution.
3Illumination intensity
If the input image is split into two substantially identical images for dual display, then the dynamic range is increased, but parallax errors occur due to inadequate light intensity variation
Solution Approach 1:
The image processing unit applies different processing parameters to the two displays: the first display receives the original image data, while the second display receives processed image data with adjusted light intensity values and contrast. This parameter differentiation eliminates parallax errors by providing each display with optimized image characteristics suited to its function.
Data Source
AI summary
A dual display device for displaying an input image includes first and second displays. The first display is arranged for modulating an image from the second display. The dual display device further includes a processor having an image splitter which splits the input image into illumination and reflection images according to a retinex algorithm. The reflection image is displayed on the first display and the illumination image is displayed on the second display. Due to the series arrangement of the two displays, the input image is substantially recreated. The illumination image typically is a spatially low-resolution image derived from the input image.