Liquid Crystal Display Panel Ionic Potential Control
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Solution Overview
Problem
Liquid crystal display panels experience issues such as image sticking, flicker, and low voltage retention when operated at low frequencies due to the influence of ions between the liquid crystal layer and the alignment film, affecting display quality.
Innovation Solution
A liquid crystal display panel design with specific ionic electric potential conditions between the liquid crystal layer and the alignment film, using a method that involves measuring and balancing the ionic electric potentials to ensure they satisfy the equation 0≤Vion_LC(1/2N)-Vion_PI(1/2N)Vion_LC(1/2N)+Vion_PI(1/2N)≤0.5, where 0.1≤N≤30, to minimize ion impact and improve display quality at low frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the liquid crystal display panel is operated at a low frequency, then the power consumption is reduced, but the ions generated by the liquid crystal layer and alignment film material significantly influence the actual electric potential, causing image sticking, flicker, and low voltage retention
Solution Approach 1:
The patent applies parameter changes by carefully selecting and adjusting the working frequency parameter (N Hz where 0.1≤N≤30) and the ionic electric potential parameters (Vion_LC and Vion_PI) to satisfy specific mathematical relationships. This optimization allows the display panel to operate at low frequencies while controlling ion-generated electric potentials to prevent image sticking, flicker, and voltage retention issues, thus maintaining display quality during low-power operation.
2Reliability
If the liquid crystal display panel is operated at a high frequency, then the ion influence on display quality is reduced, but the power consumption increases
Solution Approach 1:
The patent changes the operating frequency parameter from conventional high frequencies to optimized low frequencies (0.1≤N≤30 Hz) while simultaneously adjusting the ionic electric potential parameters to satisfy the mathematical relationship in Equation (I). This parameter optimization enables the panel to achieve good display quality at low frequencies without the usual ion-related problems, thereby reducing power consumption while maintaining reliability.
3Reliability
If suitable liquid crystal material and alignment film material are selected to satisfy the ionic electric potential equation, then the ion impact is reduced and display quality is improved, but the material selection and detection process becomes more complex
Solution Approach 1:
The patent introduces a feedback mechanism through the detection method that measures the actual ionic electric potentials (Vion_LC and Vion_PI) of the liquid crystal layer and alignment film material, respectively. By comparing these measured values against the mathematical relationship in Equation (I), the process provides feedback to guide material selection. This systematic feedback approach, while adding some detection complexity, ensures reliable material pairing that minimizes ion impact and maintains display quality.
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 effectively reduces ion impact, preventing flicker and improving display quality by selecting suitable liquid crystal and alignment film materials that meet the specified ionic electric potential conditions, ensuring stable operation at low frequencies.
Implementation Method 1
the ions of the liquid crystal layer or the alignment film materials have a smaller influence on the display quality of the display panel; however, when it is operated at a low frequency, the electric field caused by the ionic charges will significantly influence the actual electric potential imposed on the liquid crystal molecules
Data Source
AI summary
A liquid display panel is disclosed, which comprises: a first substrate; a second substrate; a first electrode and a second electrode disposed between the first substrate and the second substrate, wherein the first electrode and the second electrode have different electric potentials; a first alignment film disposed between the first electrode and the second electrode; and a liquid crystal layer disposed between the first substrate and the second substrate, wherein when a working frequency of the liquid crystal display panel is N Hz, ionic electric potentials of the liquid crystal layer and the first alignment film satisfy the following Equation (I):0≤Vion_LC(12N)-Vion_PI(12N)Vion_LC(12N)+Vion_PI(12N)≤0.5(I)wherein 0.1≦N≦30, Vion_LC(1/2N) refers to an ionic electric potential of the liquid crystal layer at a time of 1/2N, and Vion_PI(1/2N) refers to an ionic electric potential of the first alignment film at a time of 1/2N.