Transparent Electrode Joule Heating for 3D LCD Response Time
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Solution Overview
Problem
The response time of liquid crystals in naked eye type 3D LCD devices is too slow, leading to issues like image shaking and reduced 3D effect due to high viscosity coefficients, which worsen at lower temperatures.
Innovation Solution
Incorporating a transparent electrode layer that generates heat when a voltage or current is applied, reducing the viscosity coefficient of the liquid crystal electrode layer and improving response time, using materials like Indium Tin Oxide (ITO), Aluminum Zinc Oxide (AZO), or Carbon Nanotube (CNT), and optionally a transparent sheltering layer to mitigate electrical field interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a liquid crystal electrode layer is used to perform dynamic switching between 2D and 3D modes, then the naked eye type 3D display effect can be achieved, but the response time is too slow due to high viscosity coefficients
Solution Approach 1:
The patent applies voltage or current to the transparent electrode layer to generate heat through Joule heating, which changes the temperature parameter of the liquid crystal electrode layer. This temperature increase reduces the viscosity coefficient of the liquid crystal material, thereby improving the response time while maintaining the 3D display effect.
Solution Approach 2:
The patent converts the harmful effect of high viscosity (which causes slow response) into a beneficial effect by using controlled heating. The heat generated by the transparent electrode layer is used to reduce viscosity and improve response time, turning the temperature sensitivity of liquid crystals from a problem into a solution.
2Speed
If the temperature is lowered to reduce viscosity, then response time improves, but the viscosity coefficient increases again at lower temperatures
Solution Approach 1:
The patent applies continuous or periodic voltage/current to the transparent electrode layer to maintain a sustained heating effect. This ensures the liquid crystal electrode layer remains at an optimal temperature range throughout operation, preventing viscosity increase and maintaining fast response times even in lower temperature environments.
Solution Approach 2:
The transparent electrode layer serves dual functions: it controls the liquid crystal switching and simultaneously heats the liquid crystal material to maintain optimal viscosity. The system uses its own operational energy to solve the temperature-dependent viscosity problem.
3Speed
If a transparent electrode layer is added to generate heat, then response time improves, but device complexity increases
Solution Approach 1:
The transparent electrode layer performs multiple functions simultaneously: it controls the liquid crystal switching for 3D display and generates heat through Joule heating to improve response time. This multi-functionality reduces the need for separate heating elements, thereby limiting the increase in device complexity.
Solution Approach 2:
The patent merges the heating function with the existing transparent electrode layer structure. Instead of adding a separate heating element, the electrical conductivity of the transparent electrode is utilized to generate heat directly where needed, combining two functions into one component.
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 increased temperature from the transparent electrode layer enhances the response time of the liquid crystals, leading to improved 3D display performance and reduced 3D crosstalk, resulting in a better naked eye type 3D display effect.
Implementation Method 1
a voltage or current is applied to the transparent electrode layer to generate a certain heat in the 3D mode
Implementation Method 2
The heat generated by the transparent electrode layer increases a temperature of the LC electrode layer so as to increase a response time of the 3D LCD device
Data Source
AI summary
A three-dimensional (3D) liquid crystal display (LCD) device is disclosed herein and the 3D LCD device includes an LCD layer, an LC electrode layer and a transparent electrode layer. The LC electrode layer is disposed on the LCD layer and a voltage is applied to the LC electrode layer to switch between 2D mode and 3D mode. The transparent electrode layer is disposed on the LC electrode layer and a voltage or current is applied to the transparent electrode layer to generate a certain heat in the 3D mode. The heat generated by the transparent electrode layer increases the temperature of the LC electrode layer so as to increase the response time of the 3D LCD device and improve the naked eye type 3D display effect of the 3D LCD device.