Curved Liquid Crystal Display Voltage Alignment
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Solution Overview
Problem
Curved liquid crystal displays face challenges in controlling liquid crystal molecule alignment due to external forces, leading to distorted alignment and light leakage phenomena, which complicates light transmittance control.
Innovation Solution
A liquid crystal display system with a first and second substrate, including gate and data lines, electrodes, and a liquid crystal layer with reactive mesogen, where a common voltage supplier applies voltages with a predetermined difference before image display, and gate and data drivers manage signals to align liquid crystal molecules, using alignment layers to maintain parallel alignment directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a curved liquid crystal display is formed with bent display panels, then the display can be flexible and curved, but external forces distort the alignment of liquid crystal molecules leading to light leakage
Solution Approach 1:
The patent applies a preliminary voltage to the common electrode before data voltages are applied to pixel electrodes. This preliminary voltage establishes a baseline electric field that compensates for the distorting effects of the curved substrate, pre-aligning liquid crystal molecules in a controlled manner before the actual display data is written, thereby preventing light leakage while maintaining flexibility
2Shape
If external force is applied to maintain curvature of display panels, then flexible display shape is achieved, but alignment of liquid crystal molecules becomes distorted and difficult to control
Solution Approach 1:
The patent changes the voltage parameter applied to the common electrode, using a preliminary voltage that differs from the normal operating voltage. This parameter change creates an electric field configuration specifically suited for compensating curvature-induced distortion, enabling precise alignment control in the curved display configuration
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 approach effectively prevents light leakage by realigning liquid crystal molecules, ensuring controlled light transmittance and image display quality in curved surfaces.
Implementation Method 1
A voltage is applied to at least one of the field generating electrodes to generate an electric field in the liquid crystal layer. The electric field controls directions of liquid crystal molecules contained in the liquid crystal layer
Implementation Method 2
The electric field controls directions of liquid crystal molecules contained in the liquid crystal layer, thus controls transmittance of incident light through the liquid crystal layer
Implementation Method 3
a first alignment layer disposed between the pixel electrode and the liquid crystal layer and horizontally aligning the liquid crystal molecules adjacent to the pixel electrode; and a second alignment layer disposed between the second electrode and the liquid crystal layer and horizontally aligning the liquid crystal molecules adjacent to the second electrode
Data Source
AI summary
A liquid crystal display having a curved surface includes: a display panel including a first display panel, a second display panel, and a liquid crystal layer interposed therebetween and including liquid crystal molecules. The first display panel includes a first substrate on which a plurality of gate lines and data lines are formed, a first electrode, and a pixel electrode. The second display panel includes a second substrate facing the first substrate and a second electrode. The liquid crystal display further includes a common voltage supplier applying two voltages having a predetermined voltage difference to the first and second electrodes within a period before a frame displaying an image on the display panel; a gate driver applying a gate signal to each of the gate lines after the period; and a data driver applying a data voltage to the pixel electrode corresponding to the gate signal.