Liquid Crystal Display Panel Elastic Constant Ratio Optimization
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Solution Overview
Problem
Current liquid crystal display panels with equal splay and bend elastic constants (k11 and k33) fail to optimize light transmittance, especially in high-resolution applications.
Innovation Solution
A liquid crystal display panel design featuring a liquid crystal material with a splay elastic constant (k11) to bend elastic constant (k33) ratio less than 1, combined with a specific pixel structure and thickness, optimized by the formula 12*k11*k33 ≤ p^2*d ≤ k11*k33, where p is the pitch between strip portions and d is the thickness of the liquid crystal layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If liquid crystal material with equal splay elastic constant (k11) and bend elastic constant (k33) is used, then the liquid crystal molecules can be controlled to deform, but the light transmittance cannot be effectively improved in high resolution
Solution Approach 1:
The patent changes the physical parameters of the liquid crystal material by specifying a particular ratio relationship between the splay elastic constant (k11) and bend elastic constant (k33). The condition 0 < k11/k33 < 1.2 creates an optimized parameter range that improves light transmittance while maintaining controllable liquid crystal molecule deformation for display functionality.
2Measurement precision
If the liquid crystal layer thickness and pixel structure are optimized for high resolution, then the definition is improved, but the light transmittance is reduced
Solution Approach 1:
The patent establishes a mathematical relationship between the liquid crystal layer thickness (d), the pixel structure pitch (p), and the elastic constants (k11, k33) through the formula 0 < 12*k11*k33 ≤ p^2*d ≤ k11*k33. This parameter optimization allows simultaneous achievement of high resolution and improved light transmittance by coordinating multiple physical parameters rather than treating them independently.
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 improves light transmittance by balancing the splay and bend of liquid crystal molecules, enhancing the display panel's performance compared to traditional designs with equal k11 and k33 values.
Implementation Method 1
liquid crystal molecules in the liquid crystal layer have a splay elastic constant (k11) and a bend elastic constant (k33). The two coefficients can control deformation of the liquid crystal molecules, thereby controlling the arrangement manner when the liquid crystal molecules are driven.
Data Source
AI summary
A liquid crystal display panel includes a first and a second substrate, scan lines, data lines, pixel structures, a counter electrode layer, and a liquid crystal layer. The scan lines, the data lines, and the pixel structures are located above the first substrate. Each of the pixel structures includes a first active device and a first pixel electrode. The first active device is electrically connected to the scan line and the data line. The first pixel electrode is electrically connected to the first active device and has a plurality of first stripe portions. Two adjacent first stripe portions define a first slit. The first stripe portion has a width L, the first slit has a width S, the first stripe portions have a pitch p there between, and p=L+S. The liquid crystal layer is disposed between the first and second substrates and has a thickness d. The liquid crystal layer has a splay elastic constant k11 and a bend elastic constant k33, 0<(k11/k33)<1, and the liquid crystal display panel represented by a formula (1):12k11k33≤p2d≤k11k33.(1)