Display Device Moving-Manner Correction for Luminance
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Solution Overview
Problem
Conventional display devices for vehicles often experience a decrease in luminance and visual incongruity when images that have been stopped are displayed as being moved, leading to an inappropriate display.
Innovation Solution
A display device with a controller that executes moving-manner correction processing by adjusting the R, G, and B values of pixels using pre-determined RGB correction values, ensuring that pixels are displayed in corrected colors that suppress luminance decrease and maintain visual consistency when images are moved.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the image is displayed as being moved without correction, then the display is simple and fast, but luminance decrease and visual incongruity occur
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing correction values for luminance decrease in a lookup table before the image movement occurs. When the image needs to be moved, the controller simply retrieves the appropriate correction values from the pre-prepared table and applies them to the pixel data, avoiding complex real-time calculations during the display process.
Solution Approach 2:
The patent replaces complex real-time luminance correction calculations with a data retrieval and application process. Instead of performing mechanical/computational operations to calculate luminance compensation during image movement, the system substitutes this with looking up pre-computed correction values from a table and applying them directly to pixel values.
2Reliability
If RGB correction values are applied to suppress luminance decrease, then visual consistency is improved, but processing complexity increases
Solution Approach 1:
The correction values for visual consistency are pre-calculated and stored in a lookup table before runtime. The controller retrieves these values based on the specific image movement conditions and applies them to the pixel data, ensuring consistent visual appearance without requiring complex real-time processing.
Solution Approach 2:
The patent creates a copy of the correction values in a lookup table that can be quickly referenced and applied. Instead of recalculating correction parameters each time an image moves, the system copies and applies pre-determined correction data from the table to the pixel buffer.
3Stability of the object's composition
If larger RGB correction values are used for shorter image regions, then luminance uniformity is improved, but the correction processing becomes more complex
Solution Approach 1:
The patent applies local quality by using different correction values for different regions of the image based on their length in the movement direction. The lookup table stores correction values that are specific to short regions, medium regions, and long regions, allowing the system to apply appropriate correction locally to each region to maintain luminance uniformity.
Solution Approach 2:
The patent segments the image into different regions based on their length in the movement direction (short, medium, long regions). Each segment is then assigned appropriate correction values from the lookup table, allowing differentiated correction processing that maintains luminance uniformity across diverse image regions.
Data Source
AI summary
A display device includes a display unit and a controller. The display unit displays an image thereon. The controller is capable of, when the image is displayed as being moved, controlling the display unit to execute moving-manner correction processing in which pixels forming the image to be moved are displayed in display colors determined by corrected R, G, and B values obtained by adding RGB correction values to color component values provided as R, G, and B values that indicate red, green, and blue color components of respective display colors of corresponding pixels forming the image while the image has been stopped. Each of the RGB correction values has been previously determined in common for the color component values of a corresponding display color.