Multiview Backlight Optical Diffuser for Color Fringing Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Passive electronic displays, such as LCDs and EP displays, face limitations in practical applications due to their inability to emit light, which restricts their use in various applications despite their low power consumption and attractive performance characteristics.
Innovation Solution
A multiview display system employing color-tailored multibeam elements and an optical diffuser is used to provide a color multiview image, where the multibeam elements emit directional light beams of different colors, and the optical diffuser spreads these beams to match the size of the multibeam elements, mitigating color fringing and enabling effective light modulation in a multiview image presentation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If passive displays are used, then power consumption is reduced, but light emission capability is lost
Solution Approach 1:
The backlight is segmented into multiple independent light sources (first, second, and third light sources) that can be controlled separately. This segmentation allows selective activation of specific light sources for different viewing angles, enabling passive displays to achieve light emission capability while maintaining low power consumption by activating only necessary light sources.
Solution Approach 2:
The system dynamically adjusts light emission based on viewing angle requirements. The controller selectively activates different light sources (first light source for front view, second and third light sources for side views) depending on the desired viewing direction, providing dynamic light emission capability while optimizing power consumption.
2Adaptability or versatility
If directional light beams are emitted for multiview, then color fringing occurs, but light modulation capability is improved
Solution Approach 1:
Different regions of the display emit light with different characteristics tailored to specific viewing angles. The first light source provides light for front viewing, while the second and third light sources provide light for side viewing. This local quality differentiation enables effective light modulation for multiview while the optical diffuser mitigates color fringing in each specific region.
Solution Approach 2:
An optical diffuser is introduced as an intermediary component between the light sources and the display panel. The optical diffuser spreads the directional light beams from each light source, reducing color fringing effects while preserving the directional light modulation capability necessary for multiview functionality.
3Object-affected harmful factors
If optical diffuser is added to spread light beams, then color fringing is reduced, but device complexity increases
Solution Approach 1:
The optical diffuser serves multiple functions simultaneously: it spreads directional light beams to reduce color fringing, maintains light intensity distribution for multiview functionality, and works with the segmented light source configuration to enable angle-specific viewing. This multi-functionality reduces the need for additional components, thereby limiting the increase in device complexity.
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 allows for the creation of a multiview image with reduced color fringing and improved light modulation, enhancing the practicality of passive displays by enabling them to effectively display color images with characteristics comparable to active displays.
Implementation Method 1
an optical diffuser configured to spread out directional light beams from each of the different color regions to provide an image of each of the different color regions having an extent that is comparable to a size of the color-tailored multibeam element
Data Source
AI summary
A multiview backlight and display employ diffusion of directional light beams to provide an image of color regions of a color-tailored multibeam element having a size comparable to a size of the color-tailored multibeam element. The multiview backlight includes an array of color-tailored multibeam elements configured to provide the directional light beams and an optical diffuser configured to spread out directional light beams to provide the color region image. The multiview display includes an array of the color-tailored multibeam elements and the optical diffuser. The multiview display further includes an array of light valves configured to modulate the directional light beams as a multiview image.