HUD Display Brightness Zoning to Reduce Windshield Light Interference
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Solution Overview
Problem
Current head-up display systems project images onto windshields, causing adverse effects on drivers' observation of external objects, especially at night, due to residual light from non-information zones interfering with the driver's view.
Innovation Solution
A display device comprising a display module with image analysis and a controller that differentiates information and non-information zones by brightness, using a backlight module with adjustable luminous elements to ensure higher brightness only in information zones, reducing power consumption and contrast enhancement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the entire display module is illuminated to ensure information visibility, then the brightness of information zones is improved, but light interference from non-information zones increases
Solution Approach 1:
The backlight module is divided into multiple independent backlight subregions corresponding to different display subareas. Each backlight subregion can be independently controlled to illuminate only the necessary information zones while leaving non-information zones dark, thereby eliminating light interference to the driver.
Solution Approach 2:
Different regions of the display module are assigned different brightness characteristics. Information zones receive high brightness illumination while non-information zones remain dark or have reduced brightness, creating local quality differences that solve the contradiction between visibility and interference.
2Ease of manufacture
If the backlight illuminates all display subareas uniformly, then manufacturing simplicity is maintained, but power consumption increases
Solution Approach 1:
The backlight module is segmented into multiple independently controllable backlight subregions. This allows the system to illuminate only the necessary regions rather than the entire display area, significantly reducing power consumption while maintaining a relatively simple overall structure.
Solution Approach 2:
The backlight subregions are dynamically controlled based on the displayed content. The controller adjusts which backlight subregions are active at any given time, enabling power savings by illuminating only the necessary information zones rather than maintaining uniform illumination across the entire display.
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
Improves driving safety by minimizing light interference from non-information zones while ensuring drivers receive necessary information, enhancing image contrast and reducing power usage.
Implementation Method 1
a light source; a liquid crystal display device that controls a transmittance of light from the light source
Implementation Method 2
a liquid crystal display device that controls a transmittance of light from the light source
Implementation Method 3
an illuminance sensor that measures an environmental illuminance
Data Source
Figure 1A~1B
Figure 1C~2A
Figure 2B~2C
AI summary
A display device (100; 500) and method, a head-up display system (200), a means of transportation (300) and a storage medium are disclosed. The display device (100; 500) includes a display module (110), an image analysis device (120) and a controller (130). The display module (110) includes a plurality of display subareas (111), and each of the display subareas (111) includes at least one display pixel (1110); the image analysis device (120) is configured to perform an analysis of an input image received by the image analysis device (120), so as to obtain an information zone (121) of the input image and a non-information zone (122) outside the information zone (121); and the controller (130) is configured to render brightness of a display pixel (1110), with a lowest brightness in a first region, in the first region of the display module (110) higher than brightness of any display pixel (1110) in at least part of a second region of the display module (110), when the display module (110) displays the input image. The first region of the display module (110) is a display subarea of the display module (110) corresponding to the information zone (121) of the input image, and the second region of the display module (110) is a display subarea (111) of the display module (110) corresponding to the non-information zone (122) of the input image.