Vehicle Display Device Luminance Control for 3D Screen
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Solution Overview
Problem
Existing vehicle display devices struggle to create a realistic three-dimensional effect for virtual objects and are prone to image deterioration due to double-display issues caused by the uneven shape of the screen, which limits the visual recognition and appearance of the displayed information.
Innovation Solution
A vehicle display device with a projector and a screen featuring convex and concave portions, where the controller adjusts the luminance of the display light to emphasize depth, reducing the impact of reflected light and preventing double-display by controlling the luminance of light passing through inclined surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the screen is formed in an uneven shape to create a three-dimensional effect, then the visual recognition of virtual objects is improved, but double-display occurs and image appearance deteriorates
Solution Approach 1:
The patent applies local quality by assigning different luminance characteristics to different regions of the screen. Specifically, the controller makes the luminance of display light projected to convex portions higher than that projected to concave portions, creating local luminance variations that correspond to the three-dimensional surface features. This resolves the contradiction by enhancing visual recognition of virtual objects in convex regions while preventing double-display deterioration through controlled luminance differentiation between convex and concave areas.
2Illumination intensity
If the luminance of display light projected to convex portions is made higher than that to concave portions, then the three-dimensional effect is enhanced, but the overall image luminance distribution becomes uneven
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the luminance parameter of display light based on the spatial position and surface normal orientation. The controller modifies luminance values for different screen regions (convex vs. concave portions) to create three-dimensional visual effects. This resolves the contradiction by intentionally creating controlled luminance non-uniformity that enhances depth perception while maintaining overall image quality through systematic luminance management.
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 enhances the three-dimensional effect of virtual objects, improves visual recognition, and minimizes image deterioration by effectively managing luminance and reflection, resulting in a more realistic and clear display of vehicle information.
Implementation Method 1
a part of the display light is reflected at a first uneven part, and the reflected display light is incident on a second uneven part according to a condition, such as an angle of unevenness formed on the screen, or an incident angle of the display light on the uneven part
Data Source
AI summary
A vehicle display device includes a projector which emits display light of an image indicating vehicle information, a controller that controls luminance of the display light, and a screen that displays the image when the display light is projected to the screen. The screen has a convex portion that protrudes to a near side in a direction in which the image is visually recognized, and a concave portion that is recessed to a far side. In addition, the controller controls the luminance of the display light so that the display light projected to the convex portion (first parts) has higher luminance than that of the display light projected to the concave portion (second parts).