Reflective Member Redirects Light in Polymer Dispersed Liquid Crystal Display
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices with polymer dispersed liquid crystal layers face challenges in efficiently utilizing light, leading to reduced luminance and increased power consumption due to light leakage and scattering inefficiencies.
Innovation Solution
Incorporation of reflective members on specific end portions of the display panel to redirect and reuse light within the device, enhancing light utilization efficiency and maintaining high luminance without increasing power input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a polymer dispersed liquid crystal layer is used to enable light transmission and scattering switching, then display functionality is achieved, but light leakage and scattering inefficiencies occur leading to reduced luminance and increased power consumption
Solution Approach 1:
The patent applies this principle by capturing the harmful scattered and leaked light that would otherwise be wasted and redirecting it back through the liquid crystal layer. The reflective member positioned at the end portion reflects escaping light back into the display panel, allowing it to contribute to the displayed image again. This converts the harmful light leakage into a beneficial resource, improving luminance efficiency while reducing power consumption requirements
Solution Approach 2:
The patent implements continuity of useful action by creating a closed-loop light path within the display panel. Instead of light escaping and being lost, the reflective member ensures continuous circulation of light through the liquid crystal layer, maintaining useful optical action for extended periods and improving overall light utilization efficiency
2Productivity
If light is allowed to scatter in the polymer dispersed liquid crystal layer to create the display effect, then display functionality is achieved, but light utilization efficiency decreases due to light leakage
Solution Approach 1:
The reflective member captures light that would otherwise be wasted through scattering and leakage, converting this harmful effect into a beneficial resource by redirecting it back through the liquid crystal layer to contribute to the display image, thereby improving light utilization efficiency without compromising display quality
Solution Approach 2:
The patent addresses light leakage in the horizontal direction by adding a reflective member at the end portion, effectively managing light propagation in an additional spatial dimension. This dimensional approach to light control improves overall light utilization by capturing and redirecting light that escapes through the side boundaries of the display panel
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 increases light utilization efficiency, resulting in improved display quality and luminance while reducing power consumption, thereby optimizing energy usage and display performance.
Implementation Method 1
a first reflective member provided on a first end face of the array substrate... the first reflective member reflects light emitted from the light source
Implementation Method 2
The polymer dispersed liquid crystal layer can switch a transmitted state in which light is transmitted and scattering state in which light is scattered according to the application of a voltage
Data Source
AI summary
According to one embodiment, a display device includes a display panel including a first end portion and a second end portion located on a side opposite to the first end portion, a first light source emitting light to the first end portion, and a first reflective member. The display panel includes an array substrate, a counter-substrate opposed to the array substrate, and a liquid crystal layer provided between the array substrate and the counter-substrate. The array substrate has a first end face which is located in the first end portion and on which the first reflective member is provided.