Vehicle Display Pixel Layout for Driver Viewing Angle Control
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Solution Overview
Problem
Display devices in vehicles pose a risk of distracting drivers due to images intended for passengers, increasing the likelihood of traffic accidents.
Innovation Solution
A display device for vehicles with different light blocking layer arrangements around light emitting units in first and second pixels, adjusting light emission ratios based on driver line of sight angles using a lookup table, and updating these ratios based on driver information and illuminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If images are provided to passengers in a vehicle display device, then passenger entertainment and information needs are met, but driver distraction and traffic accident risk increase
Solution Approach 1:
The patent applies local quality by differentiating pixel characteristics within the same display panel. First pixels have a light blocking layer arranged at a first distance from the light emitting unit, while second pixels have it at a second distance. This creates spatially varying light emission characteristics across the display area, allowing regions to be optimized for different viewing purposes (driver vs. passenger)
Solution Approach 2:
The patent changes the light emission ratio parameter dynamically based on line of sight angle. The display panel driver determines line of sight angles between each block and the driver's line of sight, then adjusts light emission ratios of first and second pixels accordingly. This parameter adjustment reduces visibility in driver's direction while maintaining passenger viewing quality
2Object-affected harmful factors
If light emission ratios are adjusted based on line of sight angles, then driver distraction is reduced, but power consumption increases due to complex control calculations
Solution Approach 1:
The patent implements preliminary action by pre-calculating and storing light emission ratios in a lookup table (LUT) before actual display operation. The LUT contains pre-computed light emission ratios for various line of sight angles, allowing the display driver to quickly retrieve and apply appropriate ratios without performing complex real-time calculations, thus reducing power consumption while maintaining effective driver distraction reduction
3Manufacturing precision
If different light blocking layer arrangements are used in first and second pixels, then viewing angle control is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the display panel into first pixels and second pixels with different light blocking layer configurations. This segmentation allows independent optimization of light emission characteristics for different viewing zones. The light blocking layer distance varies between pixel types (first distance for first pixels, second distance for second pixels), enabling precise control over viewing angles without requiring complex continuous modulation structures
Data Source
AI summary
A display device for vehicle includes: a display panel including a display area including a first pixel and a second pixel, wherein the first pixel and the second pixel include light blocking layers differently arranged around a light-emitting units; and a display panel driver configured to drive the display panel, wherein the display panel driver is configured to determine line of sight angles between each of blocks of the display area and a line of sight of a driver based on driver information, and to determine a light emission ratio of the first pixel in each of the blocks and a light emission ratio of the second pixel in each of the blocks based on the line of sight angles for the blocks.