Directional Light Adjustment Structure for Driver Glare Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The light emitted by light emitting devices in vehicles can interfere with drivers, posing safety concerns.
Innovation Solution
A light emitting device with a light adjustment structure that adjusts the output light distribution to reduce luminance in specific angles, using structures such as wall structures, light blocking elements, and liquid crystal units to alter the light path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light emitting device emits light with high luminance in all directions, then the display brightness and visibility are improved, but the light interference to the driver increases causing safety problems
Solution Approach 1:
The patent applies local quality by creating non-uniform luminance distribution across different angular regions. The light emitting device emits high luminance toward the passenger side (azimuth angle near 0°) and reduced luminance toward the driver side (azimuth angle near 180°). This spatial variation in light intensity allows the display to remain bright and visible for passengers while minimizing glare and interference for the driver, thus resolving the contradiction between display brightness and driver safety.
2Object-affected harmful factors
If the light emitting device uses a light adjustment structure to reduce luminance in specific directions, then the safety for drivers is improved, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical light adjustment structures with a light emitting unit that inherently provides directional luminance control. Instead of using movable mirrors, rotating elements, or complex optical mechanisms to redirect light, the invention employs light emitting elements (such as OLEDs or LEDs) that can be arranged and controlled to emit light with specific angular distribution patterns. This substitution of mechanical systems with directly controllable light sources achieves the same safety effect with reduced structural complexity.
Data Source
AI summary
A light emitting device emitting an output light includes a light adjustment structure. A sub light is defined as the output light corresponding to an azimuth angle, a first value L1 is a sum of a luminance of the sub light corresponding to a polar angle from 115 to 125 degrees, a second value L2 is a sum of a luminance of the sub light corresponding to a polar angle from 95 to 105 degrees, a third value L3 is a sum of a luminance of the sub light corresponding to a polar angle from 75 to 85 degrees, a fourth value L4 is a sum of a luminance of the sub light corresponding to a polar angle from 55 to 65 degrees. The first value L1, the second value L2, the third value L3 and the fourth value L4 satisfy L3<L2, and 1.23≤(L1*L3)/(L2*L4)≤2.92.