Region-Specific Color Correction Circuit for Head-Up Display Luminance
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Solution Overview
Problem
Existing head-up display systems face challenges in maintaining consistent luminance across different regions of the display, leading to issues such as black display portions appearing whitish due to uneven luminance adjustments.
Innovation Solution
A circuit device is introduced that includes a region determination circuit and a color correction circuit. This device controls a display device with a first light source and a second light source, each adjusted by independent global dimming values. The color correction circuit performs luminance adjustments on image data based on these dimming values, ensuring appropriate luminance levels in both regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single light source is used for the entire display panel, then the device complexity is reduced, but the luminance uniformity across different regions deteriorates
Solution Approach 1:
The display panel is divided into multiple regions (first region and second region), each with its own dedicated light source (first light source and second light source). This segmentation allows independent control of luminance for each region, resolving the luminance uniformity issue while maintaining manageable device complexity through modular architecture.
Solution Approach 2:
Different regions of the display panel are provided with different light sources that can be independently controlled. The first light source is optimized for the first region while the second light source is optimized for the second region, allowing each region to have the specific luminance characteristics it needs for optimal display quality.
2Illumination intensity
If different magnification mirrors are used for different regions, then the luminance can be adjusted for each region, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical optical systems (different magnification mirrors) with a simpler electronic control system. Instead of using physically different mirrors for each region, the invention uses the same or similar optical components but controls the luminance through electronic adjustment of light source intensity and color correction processing, thereby reducing device complexity while achieving region-specific luminance control.
3Ease of operation
If global dimming is applied uniformly to the entire display, then the control simplicity is maintained, but the display quality in different regions deteriorates
Solution Approach 1:
The global dimming control is segmented into region-specific control. Instead of applying a single dimming value to the entire display panel, the patent applies different dimming values to different regions (first global dimming value for first region, second global dimming value for second region). This maintains ease of operation through independent control while improving display quality consistency across regions.
Solution Approach 2:
The dimming control is customized for each region based on its specific requirements. The first region receives dimming control optimized for its characteristics, while the second region receives different dimming control tailored to its needs, ensuring high display quality consistency across different regions without sacrificing control simplicity.
Data Source
AI summary
A circuit device configured to control a display device includes a region determination circuit configured to determine a region to which a pixel belongs, and a color correction circuit configured to perform color correction on input image data based on the region determination result. Light from the first light source controlled based on a first global dimming value enters a first region in the display panel, and light from the second light source controlled based on a second global dimming value enters a second region in the display panel. The color correction circuit performs color correction on first image data of the input image data to be displayed in the first region based on the first global dimming value, and performs color correction on second image data of the input image data to be displayed in the second region based on the second global dimming value.