Variable Flower Display Backlight Light Leakage Control
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Solution Overview
Problem
In display systems, light-emitting diodes (LEDs) cause light leakage due to their point-spread-function, leading to image quality degradation and artifacts like halos, as they illuminate areas beyond their intended portion, resulting in uneven illumination and difficulty in displaying fine image details.
Innovation Solution
The use of a 'variable flower assembly' with electronically controllable light-transmissive segments to regulate light intensity, allowing for precise control of light leakage by setting transparency levels, ensuring accurate illumination levels across different portions of the display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If light from an LED is guided through a reflective channel to confine it to a specific portion, then light leakage is reduced, but a sharp change in light intensity occurs around the edges, causing pixels outside to receive too little illumination and pixels inside to receive too much illumination
Solution Approach 1:
The reflective channel is divided into multiple independently controllable segments along the light propagation direction. Each segment can be independently adjusted to have different reflectivity levels, allowing the system to create a gradual transition zone that reduces the sharp intensity change at edges while maintaining light confinement benefits
Solution Approach 2:
The reflective channel incorporates dynamically adjustable reflective segments that can change their reflectivity in real-time based on display content requirements. This dynamic control allows the system to optimize between light confinement and illumination uniformity for different scenes, preventing both light leakage and edge intensity artifacts
2Use of energy by moving object
If LEDs are used to illuminate specific portions of the display area, then energy efficiency is improved, but light leakage into neighboring portions degrades image quality and causes artifacts such as halos
Solution Approach 1:
A reflective channel with controllable reflective segments is introduced as an intermediary between the LED and the display area. This intermediary structure guides and confines light from each LED to its intended portion while allowing dynamic adjustment to prevent light leakage into neighboring portions, maintaining both energy efficiency and image quality
Solution Approach 2:
The system dynamically changes the reflectivity parameter of different segments in the reflective channel based on the display content and lighting requirements. By adjusting these parameters, the system optimizes light distribution to prevent leakage while maintaining energy efficiency for each specific display scenario
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 reduces halo effects and improves image quality by preventing unwanted light leakage, allowing for consistent illumination and enhanced display of fine details in high dynamic range images.
Implementation Method 1
each wall comprises a plurality of light-transmissive segments. Each light-transmissive segment is configured to be set to a separate light-transparency level
Data Source
AI summary
Techniques for using variable flower assemblies to control light leakage between designated portions of light-emitting elements are provided. In some embodiments, a variable flower assembly (100) comprises a plurality of light-transmissive segments (102-1, 102-2, . . . , 102-6) each may be electronically set to a different light-transparency level. The variable flower assembly substantially forms a tube around a light-emitting element (104) mounted on a first plane. A first edge of each of the light-transmissive segments collectively surrounds the light-emitting element on a second plane substantially parallel to the first plane. A second opposing edge of each of the light-transmissive segments collectively forms an opening of the tube. In some embodiments, a reflective assembly (120) which reflectance level is electronically controllable may surround the variable flower assembly.