Motor Vehicle Display Cone Geometry for Driver Readability
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Solution Overview
Problem
Existing motor vehicle display devices suffer from poor readability due to the lack of precise specification of inclination angles for lateral areas, leading to suboptimal perspectively correct three-dimensional displays, especially for symbols intended for the vehicle driver.
Innovation Solution
A display device with a display area comprising an inner and lateral area, where the lateral area is formed as a partial cone or pyramid, with a viewing ray intersecting the cone or pyramid axis at specific angles to ensure the viewer's position is within a predefined volume, allowing for improved symbol readability and perspectively correct displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the lateral area is inclined with respect to the inner area to improve visibility, then the read-out of numerals is improved, but the inclination angle is not precisely specified leading to poor reading precision
Solution Approach 1:
The patent applies parameter changes by precisely specifying the inclination angle of the lateral area relative to the inner area. The lateral area is inclined at an angle of 10° to 20° with respect to the inner area, which optimizes the viewing geometry for the driver's eye position. This precise angular parameter specification resolves the contradiction by providing both improved readability and a clear manufacturing guideline.
Solution Approach 2:
The patent introduces a third dimension by inclining the lateral area relative to the inner area, transforming a two-dimensional display plane into a three-dimensional structure. This dimensional change creates an optimized viewing angle for symbols positioned on the lateral area, improving reading precision while maintaining a relatively simple overall structure.
2Shape
If numerals are displayed smaller at the rear part of the display area to achieve perspectively correct three-dimensional display, then the perspective correctness is improved, but the read-out of numerals deteriorates
Solution Approach 1:
The patent applies local quality by differentiating the display characteristics for different areas of the display device. The inner area and lateral area are treated differently: the inner area maintains a standard view, while the lateral area is specifically inclined at 10° to 20° to optimize symbol visibility. This localized optimization allows perspectively correct display without compromising numeral readability in critical areas.
Solution Approach 2:
The display area is segmented into an inner area and a lateral area, each with different functional requirements. By dividing the display into these segments, the patent can apply different geometric transformations to each segment, achieving overall perspective correctness while maintaining optimal readability in each specific zone.
3Measurement precision
If the lateral area is formed with a steep inclination to improve visibility, then the symbol visibility is improved, but the reference to the viewer's eye position is missing
Solution Approach 1:
The patent incorporates feedback by considering the driver's eye position as the reference point for defining the display geometry. The lateral area's inclination angle of 10° to 20° is specifically calculated based on the typical eye position of the driver, creating an optimized viewing geometry that adapts to the user's position rather than requiring adjustment mechanisms.
Data Source
AI summary
A display device (1) of a motor vehicle, wherein the display device (1) has a display area having a display area center (3), wherein the display area has at least one inner area (4) and at least one lateral area (5), wherein the lateral area (5) is formed as a partial lateral area of a first cone which is characterized by an angle of aperture (φ) and a first cone axis (6), wherein a viewing ray (8) directed form at least one viewing unit (7) onto the display device center (3) intersects the first cone axis (6) in an intersecting angle (α) so that the sum of the half of the angle of aperture (φ/2) and the intersecting angle (α) is in an angular range from 75 degrees to 105 degrees, wherein the viewing unit (7) is positioned within a predefined position volume (11) in the motor vehicle.