Ferroelectric Liquid Crystal Transflective Display Panel
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Transflective liquid crystal display panels face challenges with slow response time and narrow viewing angles, particularly in ECB mode, where the response speed is several tens of milliseconds and the viewing angle is limited, making it difficult to display moving pictures effectively.
Innovation Solution
A transflective liquid crystal display panel utilizing a ferroelectric liquid crystal cell operating in a half V-switching mode, with a reflective and transmissive portion sharing a similar cell gap, and applying different voltages based on ambient light levels to optimize brightness and response time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If ECB mode liquid crystal material is used in transflective display, then wide viewing angle is achieved, but response time becomes slow (several tens of milliseconds)
Solution Approach 1:
The patent changes the operating mode parameter from ECB to ferroelectric liquid crystal half V-switching mode, which fundamentally alters the switching characteristics. This parameter change enables response time reduction to less than 1 ms while maintaining wide viewing angle capability, resolving the contradiction between viewing angle and response time.
Solution Approach 2:
The patent utilizes the phase transition characteristics of ferroelectric liquid crystals in half V-switching mode. The liquid crystal material undergoes controlled phase changes between different orientations in response to voltage application, enabling fast switching (less than 1 ms) while maintaining the wide viewing angle property through the specific phase transition mechanism.
2Illumination intensity
If different cell gaps are used for reflective and transmissive portions, then light transmittance can be optimized, but manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by optimizing the cell gap configuration specifically for the reflective portion while maintaining a standard cell gap for the transmissive portion. By localizing the different cell gap design to only where needed (reflective portion), the patent achieves optimized light transmittance without unnecessarily increasing overall manufacturing complexity.
3Loss of time
If TN mode liquid crystal material is used, then fast response time is achieved, but viewing angle becomes narrow
Solution Approach 1:
The patent changes the liquid crystal material type parameter from TN mode to ferroelectric liquid crystal mode operating in half V-switching mode. This fundamental parameter change enables simultaneous achievement of fast response time (less than 1 ms) and wide viewing angle, resolving the contradiction that plagues TN mode displays.
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 achieves a response time of less than 1 ms and a wide viewing angle, significantly improving the display quality of moving pictures by ensuring uniform light transmittance across both reflective and transmissive modes, reducing the disclination phenomenon and optimizing brightness.
Implementation Method 1
a ferroelectric liquid crystal cell operating in a half V-switching mode
Implementation Method 2
the transflective liquid crystal display device reflects the ambient light using a reflective plate
Implementation Method 3
A voltage applied to the ferroelectric liquid crystal cell depends on a brightness level of ambient light
Data Source
AI summary
A transflective liquid crystal display panel includes a ferroelectric liquid crystal cell operating in a half V-switching mode. The ferroelectric liquid crystal cell includes a reflective portion and a transmissive portion. A cell gap of the reflective portion is similar to a cell gap of the transmissive portion. A voltage applied to the ferroelectric liquid crystal cell depends on a brightness level of ambient light.