Light Emitting Device with Light-Shielding Films for Sharp Luminance
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Solution Overview
Problem
There is a demand for a light emitting device with a desired light distribution property that achieves a sharp luminance difference between lit and unlit light emission surfaces without reducing the overall luminance, which existing technologies have not effectively addressed.
Innovation Solution
A method of manufacturing a light emitting device involves forming light-shielding films on a light-transmissive plate, dividing it into plate-shaped optical components, and arranging these components alternately with light emitting elements on a substrate to achieve the desired light distribution, ensuring sharp luminance contrast without reducing overall luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light-shielding films are added to optical components to control light distribution, then light distribution property is improved, but device complexity increases
Solution Approach 1:
The patent applies light-shielding films only to specific lateral surfaces of optical components rather than uniformly to all surfaces. This local quality approach allows precise control of light distribution in specific directions while maintaining simplicity in other areas. By selectively treating only the necessary surfaces with light-shielding films, the device achieves desired light distribution properties without adding unnecessary complexity to the overall structure.
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 approach effectively inhibits luminance reduction while achieving a sharp luminance difference between lit and unlit areas, providing a desired light distribution suitable for applications like automotive headlamps.
Implementation Method 1
forming light-shielding films respectively on an upper surface of a light-transmissive plate and a lower surface of the light-transmissive plate opposite to the upper surface
Implementation Method 2
a light-transmissive plate, dividing the light-transmissive plate together with the light-shielding films from the upper surface to the lower surface
Data Source
AI summary
A method of manufacturing a light emitting device includes: forming light-shielding films respectively on an upper surface of a light-transmissive plate and a lower surface of the light-transmissive plate opposite to the upper surface; dividing the light-transmissive plate together with the light-shielding films from the upper surface to the lower surface or from the lower surface to the upper surface, to form a plurality of plate-shaped optical components; and fixing a cut surface of each of the optical components to a corresponding one of a plurality of light emitting elements, and arranging the light emitting elements on a substrate in a row or in a matrix so that the cut surfaces of the optical components and the light-shielding films are alternately arranged along a row direction in a lateral side view as seen in a direction parallel to the substrate and perpendicular to the row direction.