Transparent LCD Pixel Segmentation via Sustain Electrode Partitioning
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Solution Overview
Problem
Conventional liquid crystal displays (LCDs) have low transmittance, making them unsuitable for transparent display applications, unlike organic light-emitting diode (OLED) displays, which limits their use in aesthetic and low-power consumption transparent display devices.
Innovation Solution
The LCD configuration includes a sustain electrode line that partitions the pixel into a first region with a pixel electrode and a transparent second region, allowing for higher transmittance by separating the pixel into distinct areas, thereby enabling a transparent display while maintaining low power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional LCD configuration is used, then display quality is maintained, but light transmittance is low (making transparent display impossible)
Solution Approach 1:
The pixel is divided into a first region containing the pixel electrode and a second region without the pixel electrode. This segmentation allows the second region to transmit light while the first region maintains display function, achieving overall high transmittance for transparent display application
Solution Approach 2:
Different regions of the pixel are assigned different functions: the first region is optimized for display quality with pixel electrode, while the second region is optimized for light transmittance by removing the pixel electrode. This local differentiation resolves the contradiction between display quality and transparency
2Illumination intensity
If transparent display is implemented by removing pixel electrode, then light transmittance increases, but display quality deteriorates
Solution Approach 1:
By segmenting the pixel into functional regions, the invention maintains pixel electrodes in the first region for display quality while leaving the second region transparent, thus achieving both display quality and high transmittance simultaneously
Solution Approach 2:
The sustain electrode line serves multiple functions: it acts as a common electrode for the liquid crystal layer and simultaneously serves as a partitioning structure that defines the boundary between the first and second regions. This multi-functionality helps achieve transparent display without compromising display performance
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 configuration significantly increases light transmittance to at least 10%, allowing the LCD to be used as a transparent display that is viewable from both sides without compromising display quality or increasing power consumption.
Implementation Method 1
a liquid crystal material having an anisotropic dielectric constant and that is injected between the upper and lower display panels
Implementation Method 2
different electric potentials are applied to the pixel electrodes and the common electrode to adjust the intensity of an electric field formed in the liquid crystal material. Accordingly, the molecular arrangement of the liquid crystal material is changed
Data Source
AI summary
A liquid crystal display (LCD) is provided that includes: a first substrate; a gate line formed on the first substrate; a data line intersecting the gate line to define a pixel; a thin-film transistor (TFT) connected to the gate line and the data line and formed in the pixel; a sustain electrode line including a first sustain electrode that passes through the pixel, so as to divide the pixel into a first region and a transparent second region, and a second sustain electrodes that extend perpendicularly from the first sustain electrode; and a first pixel electrode connected to the TFT, disposed in the first region.