Segmented Polarizer Linear Patterns Light Efficiency
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Solution Overview
Problem
Liquid crystal display apparatuses face reduced light efficiency due to the use of polarizers that absorb light, particularly when relying on external light sources like natural or fluorescent light, which affects the overall display performance.
Innovation Solution
A polarizer design featuring linear patterns spaced apart on a substrate with air gaps, where the polarizer overlaps color and white areas, and a manufacturing method involving a metal layer, hard mask, and polymer layer formation to create a pattern with varying thicknesses, allowing for improved light transmission and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional polarizer is used to control light transmittance, then the polarization function is achieved, but light efficiency decreases due to light absorption
Solution Approach 1:
The polarizer is divided into multiple linear patterns spaced apart from each other, creating open areas between the patterns. This segmentation allows light to pass through the open areas without being absorbed, while the linear patterns provide the necessary polarization function. The polarizer thus consists of discrete linear pattern elements rather than a continuous absorbing layer.
Solution Approach 2:
Different regions of the polarizer have different optical properties. The linear patterns provide polarization control, while the open areas between patterns allow high light transmission. The color areas and white areas also have different light transmission characteristics, with the white areas providing higher transmission for improved light efficiency in specific regions.
2Ease of operation
If a polarizer absorbs light to control transmittance, then polarization control is achieved, but display performance deteriorates
Solution Approach 1:
The polarizer is segmented into linear patterns with open areas, reducing overall light absorption while maintaining polarization control capability. This segmentation improves display performance by allowing more light to reach the liquid crystal layer and external light sources to pass through, while the linear patterns still provide the necessary polarization function for operation.
3Reliability
If additional light-blocking patterns are used to improve display performance, then display quality improves, but light efficiency further decreases
Solution Approach 1:
The polarizer structure is merged with the light-blocking patterns by positioning the linear patterns of the polarizer to overlap with the color areas and white areas. This integration allows the polarizer to perform both polarization control and light management functions simultaneously, reducing the need for separate additional light-blocking patterns and minimizing overall light loss.
Solution Approach 2:
The light-blocking patterns are strategically positioned in specific regions rather than uniformly across the display. The polarizer's linear patterns overlap with color areas and white areas, allowing light efficiency to be optimized in different regions - with higher transmission in white areas and appropriate blocking in color areas, achieving display quality without excessive light loss.
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 polarizer design enhances light efficiency by optimizing light transmission through color and white areas, improving the display panel's performance when using external light sources and reducing the need for additional light-blocking patterns, thus enhancing the display's transparency and reflectivity.
Implementation Method 1
The polarizer may transmit a polarization component parallel to a transmitting axis, and may block a polarization component perpendicular to the transmitting axis
Data Source
AI summary
A display panel includes a light blocking pattern and a polarizer. The light blocking pattern is disposed on a base substrate. A plurality of opening areas is defined based on the light blocking pattern. The polarizer includes a plurality of linear patterns spaced apart from each other. The plurality of opening areas includes a color area transmitting color light and a white area transmitting white light. The polarizer overlaps the color area and the white area.