Automobile Meter Prism Recesses for Color Light Shielding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional three-dimensional scale structures in automobile meters suffer from direct light mixing with colored light, leading to reduced visibility and uneven color shades, especially in the red zone, due to the lack of effective light reflection and shielding.
Innovation Solution
The introduction of recesses on the light-guiding-body rear surface with color printing that forms an erected shielding portion to block direct light, ensuring only colored light exits, and the application of color printing on the dial surface between through holes to minimize color shade differences, while using shared light sources for illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If color printing is applied on the rear surface of the prism to enable colored light exit, then the visibility of colored zones is improved, but the direct white illumination light mixes with the colored light causing reduced visibility and color accuracy
Solution Approach 1:
The invention divides the rear surface of the light guiding body into distinct functional zones: a colored region with color printing for colored light exit, and an uncolored region for white illumination light exit. This spatial segmentation prevents mixing of direct white light with colored reflected light, resolving the contradiction between visibility enhancement and color purity maintenance.
2Illumination intensity
If auxiliary scales are printed in red color on the dial surface, then visibility during daylight is improved, but the transmitted light shows different color shades due to underlying red color printing on the prism
Solution Approach 1:
The invention segments the light guiding body's rear surface into colored and uncolored regions, positioning the uncolored region directly behind the auxiliary scales. This ensures that light transmitted through the auxiliary scales maintains consistent color shades regardless of the dial's surface printing, while still providing daylight visibility.
3Illumination intensity
If the entire rear surface of the light guiding body is covered with color printing, then colored light visibility is maximized, but the structure complexity and manufacturing difficulty increase
Solution Approach 1:
The invention applies color printing only to the specific region of the light guiding body's rear surface that corresponds to the three-dimensional scales, while leaving other regions uncolored. This localized approach achieves colored light visibility where needed without increasing overall structural complexity or manufacturing difficulty.
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
This configuration enhances visibility and aesthetic appeal by preventing direct light mixing, maintaining consistent color shades, and allowing shared component usage for cost-effectiveness.
Implementation Method 1
a light guiding body disposed on a rear surface of the dial and from a base end side of which a light emitted from a light source is incident
Implementation Method 2
the colored light 515 that is guided by the prism 503 and that is reflected from the red color printing 517
Data Source
AI summary
A three-dimensional design section structure of a meter for automobile includes a dial; a prism disposed on a rear surface of the dial and from a base end side of which a light emitted from light sources is incident; three-dimensional scales disposed in a protruding manner at a leading end side of the prism and configured to protrude via through holes perforated in the dial; recesses formed encompassing the three-dimensional scales on a light-guiding-body rear surface, which faces an opposite side to the dial, of the prism; and color printing configured to be applied including the recess so as to encompass the three-dimensional scales on the light-guiding-body rear surface.