Nanostructure Angle-of-View Adjustment Layer for Displays
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Solution Overview
Problem
Electronic device displays often suffer from limited color gamut, narrow viewing angles, and high manufacturing costs due to the narrow angular spread of light emitted by pixels, which affects image visibility and user experience.
Innovation Solution
The implementation of an angle-of-view adjustment layer using holographic structures or metasurfaces with nanostructures, such as titanium oxide, to increase the angular spread of emitted light, enhancing the viewing angle without aligning the structures with individual pixels, thereby improving visibility and maintaining color purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional pixel structures are used, then manufacturing is simpler, but viewing angle is limited and color gamut is low
Solution Approach 1:
The patent introduces an angle-of-view adjustment layer as an intermediary component between the pixel array and the viewer. This layer contains light redirecting structures that mediate the light path, expanding the viewing angle without requiring changes to the pixel structure itself, thus maintaining manufacturing simplicity while improving viewing angle adaptability
Solution Approach 2:
The patent adds a new dimensional layer (the angle-of-view adjustment layer) above the pixel array. This creates a three-dimensional optical path modification system that redirects light at different angles, effectively adding angular dimensionality to the light emission without complicating the base pixel structure
2Adaptability or versatility
If light redirecting structures are added to enhance viewing angle, then viewing angle improves, but manufacturing complexity increases
Solution Approach 1:
The patent segments the light redirecting function into discrete, standardized structures within the angle-of-view adjustment layer. These segmented structures can be independently fabricated and positioned, making the complex function of wide-angle viewing achievable through modular assembly rather than monolithic complex design
Solution Approach 2:
The patent implements light redirecting structures with specific geometric parameters that provide more angular spread than the minimum required. This excessive action in light redirection capability ensures wide viewing angles are achieved while the structures themselves remain relatively simple in design, balancing performance with manufacturability
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 solution effectively broadens the angular distribution of light emitted by pixels, enhancing the viewing angle and user experience while maintaining high efficiency and color accuracy, thus addressing the limitations of traditional display technologies.
Implementation Method 1
The angle-of-view adjustment layer may be formed from holographic structures. The holographic structures may be created using photosensitive materials. For example, an angle-of-view adjustment layer may be formed from holographic structures recorded by applying laser beams to a photosensitive layer or a stack of photosensitive layers.
Implementation Method 2
If desired, an angle-of-view adjustment layer may be formed from a metasurface that is created by patterning nanostructures on the display. The nanostructures can be formed using printing, photolithography, or other patterning techniques. Metal oxides such as titanium oxide and other materials may be used in forming the nanostructures.
Data Source
AI summary
A display may have an array of pixels. Each pixel may have a light-emitting diode such as an organic light-emitting diode or may be formed from other pixel structures such as liquid crystal display pixel structures. The pixels may emit light such as red, green, and blue light. An angle-of-view adjustment layer may overlap the array of pixels. During operation, light from the pixels passes through the angle-of-view adjustment layer to a user. The viewing angle for the user is enhanced as the angular spread of the emitted light from the pixels is enhanced by the angle-of-view adjustment layer. The angle-of-view adjustment layer may be formed from holographic structures recorded by applying laser beams to a photosensitive layer or may be formed from a metasurface that is created by patterning nanostructures on the display using printing, photolithography, or other patterning techniques.