Liquid Crystal Lens Control for Display Luminance Uniformity
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Solution Overview
Problem
Conventional display devices using liquid crystal panels struggle to achieve uniform luminance and contrast due to limitations in controlling the shape and position of lenses in the liquid crystal layer, leading to variations in light refraction and intensity across the display panel.
Innovation Solution
A display device comprising a liquid crystal element with multiple control electrodes that apply specific voltages to form lenses of different shapes and positions within the liquid crystal layer, allowing for precise control of light refraction and intensity distribution across the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional liquid crystal panels are used, then the device structure is simple, but uniform luminance and contrast cannot be achieved due to limitations in controlling lens shape and position
Solution Approach 1:
The control electrode is divided into multiple independent control electrodes (first, second, third, and fourth control electrodes) that can be independently controlled. This segmentation allows precise control over different regions of the liquid crystal layer, enabling formation of lenses with specific shapes and positions to achieve uniform luminance and contrast across the display panel.
Solution Approach 2:
Different voltages are applied to different control electrodes to create local variations in lens shape and position. The first and second control electrodes form lenses with different characteristics from those formed by the third and fourth control electrodes, allowing optimization of light refraction and intensity distribution in different regions of the display.
2Manufacturing precision
If multiple control electrodes are added to control lens shape and position, then luminance uniformity improves, but device complexity increases
Solution Approach 1:
The control electrode arrangement uses asymmetric positioning and voltage application strategies. The first and second control electrodes are positioned and controlled differently from the third and fourth control electrodes, creating asymmetric lens formations that optimize light control for achieving uniform luminance while managing device complexity.
3Adaptability or versatility
If lenses of different shapes are formed in the liquid crystal layer, then light refraction control improves, but manufacturing precision requirements increase
Solution Approach 1:
The system dynamically adjusts voltage levels applied to different control electrodes to form lenses of varying shapes and positions. By dynamically controlling the voltage magnitude and distribution across the first, second, third, and fourth control electrodes, the system achieves versatile light refraction control while managing the precision requirements through programmable voltage patterns.
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 enables improved uniformity in luminance and contrast by adjusting the directivity and intensity of reflection light based on the observer's position, enhancing display quality without degrading polarization or requiring additional components.
Implementation Method 1
a plurality of liquid crystal microlens portions are formed as voltage being applied to the liquid crystal layer
Implementation Method 2
an image display device comprising a diffusion-control liquid crystal panel and a liquid crystal display panel
Implementation Method 3
a display device comprising: a display panel comprising a reflective layer
Data Source
AI summary
According to one embodiment, a display device includes a display panel including a reflective layer, a liquid crystal element opposing the display panel and a controller that controls the liquid crystal element. The liquid crystal element includes a first substrate, a second substrate, a liquid crystal layer, a first control electrode, a second control electrode, a third control electrode, and a fourth control electrode. The controller applies a first voltage for forming a first lens of a first shape, to the first control electrode and the second control electrode, and a second voltage for forming a second lens of a second shape, to the third control electrode and the fourth control electrode. The first shape is different from the second shape.