Stretched Reflective Polarizing Layer for LCD Luminance and Stability
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Solution Overview
Problem
Liquid crystal display panels face distortion due to changes in temperature and humidity, which affects the size and volume of reflective polarizing elements, leading to decreased luminance and increased manufacturing costs.
Innovation Solution
A liquid crystal display panel design incorporating a reflective polarizing element with two polarizing layers of different refractive indexes, where one layer is stretched parallel to the transmission axis and the other perpendicular, to maintain panel stability and enhance luminance without using dual brightness enhancement films.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a reflective polarizing element is used to increase luminance, then the luminance of the display apparatus is improved, but the size and volume of the polarizing element are affected by temperature and humidity changes causing contortion of the display panel
Solution Approach 1:
The patent applies parameter changes by stretching the polarizing layers in specific directions to modify their physical properties. The first polarizing layer is stretched in a direction substantially parallel to its transmitting axis, while the second polarizing layer is stretched in a direction substantially perpendicular to its transmitting axis. This stretching operation changes the physical parameters of the polarizing layers to compensate for environmental variations and prevent contortion.
Solution Approach 2:
The patent uses composite materials by combining multiple polarizing layers with different refractive indexes and stretching configurations. The first polarizing element includes a first polarizing layer and a second polarizing layer with different refractive indexes, creating a composite structure that leverages the complementary properties of each layer to achieve both high luminance and environmental stability.
2Illumination intensity
If dual brightness enhancement films are used to increase luminance, then the optical efficiency is improved, but the manufacturing cost increases
Solution Approach 1:
The patent merges the functions of multiple components by integrating the polarizing layers directly into the reflective polarizing element structure. Instead of using separate dual brightness enhancement films, the stretched polarizing layers perform both polarization and brightness enhancement functions, reducing the total number of components and simplifying the manufacturing process.
Solution Approach 2:
The patent extracts the brightness enhancement function from separate optical films and incorporates it into the polarizing element itself through the stretched polarizing layers. This extraction eliminates the need for additional brightness enhancement films, thereby reducing manufacturing complexity and cost while maintaining optical efficiency.
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 design prevents distortion caused by environmental changes, increases luminance by recycling polarized light, and reduces manufacturing costs by eliminating the need for additional optical enhancement films.
Implementation Method 1
the first polarizing element including a first polarizing layer and a second polarizing layer having different refractive indexes
Implementation Method 2
the first polarizing layer having been stretched in a direction substantially parallel to a transmitting axis of the first polarizing element, and a second polarizing element disposed on the second substrate, the second polarizing element having been stretched in a direction substantially perpendicular to a transmitting axis of the second polarizing element
Data Source
AI summary
A liquid crystal display panel includes a first substrate, a second substrate facing the first substrate, a liquid crystal layer disposed between the first substrate and the second substrate, a first polarizing element disposed under the first substrate, the first polarizing element including a first polarizing layer and a second polarizing layer having different refractive indexes, the first polarizing layer having been stretched in a direction substantially parallel to a transmitting axis of the first polarizing element, and a second polarizing element disposed on the second substrate, the second polarizing element having been stretched in a direction substantially perpendicular to a transmitting axis of the second polarizing element.