Vehicular Head-Up Display Luminance Control via Segmented Zones
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Solution Overview
Problem
Vehicular head-up display apparatuses face luminance unevenness issues in the front direction due to high parallel light transmittance, which affects the visibility of the virtual image surface.
Innovation Solution
A vehicular head-up display apparatus with a light source, display panel, and controller that creates a virtual image surface with distinct luminance areas, using a diffusion plate with high parallel light transmittance to control luminance distribution, allowing selective display of information in areas of varying luminance to enhance visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a diffusion plate with high parallel light transmittance is used to increase luminance in the front direction, then the luminance in the front direction is improved, but unevenness occurs in the luminance distribution
Solution Approach 1:
The invention divides the display surface into multiple luminance areas with different luminance characteristics. Specifically, it creates a high luminance area and a low luminance area on the display surface, allowing different regions to have optimized luminance properties suitable for their specific display needs, thereby resolving the contradiction between overall luminance enhancement and luminance uniformity
Solution Approach 2:
The display surface is segmented into distinct luminance zones (high luminance area and low luminance area) that can be independently controlled. This segmentation allows the system to address luminance unevenness by treating different regions differently, while still utilizing the high parallel light transmittance diffusion plate for overall luminance enhancement
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
The solution improves visibility by creating a virtual image surface with clearly distinguishable alert information in a high luminance area and less critical information in a lower luminance area, optimizing the display for better attention focus and overall visibility.
Implementation Method 1
the vehicular head-up display apparatus may include a diffusion plate which is high in total light transmittance and parallel light transmittance
Data Source
AI summary
A vehicular head-up display apparatus comprises a light source apparatus, a display panel, an optical member, and a controller. The display panel is configured to change illumination light from the light source apparatus into display light on a display surface. The optical member is configured to guide the display light from the display panel to a certain space. The display surface includes a first luminance area displayable at a first luminance, and a second luminance area displayable at a second luminance which is lower in luminance than the first luminance. The controller is configured to selectively display information in the first luminance area and the second luminance.