Optical Control Panel for Vehicle Display Glare Reduction
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Solution Overview
Problem
Display apparatuses installed in vehicles can reflect light onto the driver's window, compromising the driver's vision and posing a safety concern due to the wide viewing angle of light emission.
Innovation Solution
A display apparatus with an optical control panel comprising a base film, a transmissive layer, an organic layer with patterns, and a light-shielding layer made of metal oxide materials, which limits the viewing angle of light emission by absorbing external light and internally reflected light, reducing glare from the driver's perspective.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional display apparatus is used without optical control, then light can be viewed from wide angles, but light reflects off the vehicle window and compromises driver vision
Solution Approach 1:
The optical control panel implements different optical properties in different regions: the first light-shielding layer with grooves provides light shielding at oblique angles, while the second transmissive layer fills the grooves to allow light transmission at perpendicular angles. This local differentiation of optical properties resolves the contradiction by allowing wide viewing angles for normal operation while blocking harmful reflections at specific angles toward the driver.
Solution Approach 2:
The optical control panel is segmented into multiple functional layers: a base film, first transmissive layer, first organic layer with patterns, first light-shielding layer with grooves, and second transmissive layer. This segmentation allows each layer to perform its specific function - the light-shielding layer blocks oblique light while the transmissive layers allow perpendicular light passage, collectively resolving the viewing angle versus reflection hazard contradiction.
2Reliability
If a light-shielding layer is added to limit viewing angle, then driver safety is improved, but device structure becomes more complex
Solution Approach 1:
The optical control panel uses a nested structure where the second transmissive layer is disposed within the grooves of the first light-shielding layer. This nesting approach allows the light-shielding function and light-transmission function to be integrated in a compact manner, reducing overall structural complexity while maintaining the safety benefits of limited viewing angles.
Solution Approach 2:
The optical control panel serves multiple functions simultaneously: it limits viewing angles to prevent driver glare, transmits light for display visibility, and provides a compact integrated structure. The first light-shielding layer and second transmissive layer work together to achieve both light blocking and light transmission functions, reducing the need for separate components and simplifying the overall device structure.
3Illumination intensity
If multiple layers are used in the optical control panel, then light transmission and shielding are optimized, but manufacturing precision requirements increase
Solution Approach 1:
The base film with pre-formed grooves serves as a template structure before depositing the first light-shielding layer and second transmissive layer. This preliminary structure ensures that subsequent layers are deposited in the correct positions and orientations, reducing the precision requirements for layer alignment during manufacturing while optimizing light transmission and shielding performance.
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 effectively limits the viewing angle of light emitted from the display apparatus, reducing glare and enhancing safety by minimizing light reflection from the vehicle window, while allowing light to be transmitted perpendicular to the display's front surface.
Implementation Method 1
a first light-shielding layer disposed on upper surface and on side surfaces of the plurality of first organic patterns, wherein the first light-shielding layer includes a plurality of grooves exposing at least a part of an upper surface of the first transmissive layer
Implementation Method 2
a second transmissive layer disposed on the first light-shielding layer and filling the plurality of grooves, wherein the second transmissive layer includes a transmissive organic material
Data Source
AI summary
A display apparatus including an optical control panel. The optical control panel includes a base film, a first transmissive layer disposed on the base film, a first organic layer disposed on the first transmissive layer, the first organic layer including first organic patterns that extend in a first direction, and a first light-shielding layer disposed on an upper and on side surfaces of the first organic patterns, the first light-shielding layer also including a plurality of grooves exposing at least a part of the first transmissive layer.