Transflective Polarizer Design for Outdoor LCD Brightness and Power
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Solution Overview
Problem
Traditional reflective liquid crystal display (LCD) panels face high power consumption due to the need for high brightness in outdoor settings, and existing polarizer designs suffer from low contrast and high costs, with complex structures and light dispersion issues.
Innovation Solution
A display panel design incorporating a liquid crystal cell with a first polarizing assembly and a second polarizing assembly, featuring a transflective layer and a light absorbing layer, which transmits and reflects polarized light based on its polarization direction, improving contrast and reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional reflective LCD panels use high brightness to achieve good display效果 in outdoor settings, then the display visibility is improved, but the power consumption increases significantly
Solution Approach 1:
The patent converts the harmful effect of ambient light into a beneficial resource by using a reflective polarizer design. The transflective layer reflects polarized light back through the liquid crystal cell, allowing the display to utilize ambient light for illumination rather than requiring high-power backlighting, thus reducing power consumption while maintaining outdoor visibility
Solution Approach 2:
The patent changes the optical parameters of the polarizer assembly by introducing a transflective layer with specific polarization characteristics. This layer has a transmission axis oriented at 45 degrees relative to the liquid crystal cell's polarization axis, enabling it to selectively transmit and reflect polarized light to improve contrast ratio and reduce the need for high brightness
2Device complexity
If traditional polarizer designs are used in reflective LCD panels, then the structure is simple, but the contrast ratio is low and production costs are high
Solution Approach 1:
The patent employs a composite polarizer structure combining a transflective layer and a light absorbing layer. The transflective layer uses a specific material composition with polarization-selective properties, while the light absorbing layer absorbs unwanted polarized light. This composite design achieves high contrast ratio while maintaining manufacturing feasibility through established thin-film deposition techniques
Solution Approach 2:
The patent extracts the light absorption function from the traditional polarizer structure by adding a separate light absorbing layer. This layer is positioned to absorb polarized light that would otherwise reduce contrast, thereby improving the contrast ratio without significantly increasing structural complexity
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 enhances the contrast of the display panel while reducing power consumption and production costs by effectively managing light transmission and reflection, achieving a more efficient and cost-effective reflective display.
Implementation Method 1
the transflective layer has a second transmission axis and the transflective layer (1031) is configured for transmitting polarized light whose polarization direction is parallel to the second transmission axis and for reflecting polarized light whose polarization direction is perpendicular to the second transmission axis
Implementation Method 2
the light absorbing layer is configured for absorbing polarized light transmitted by the transflective layer
Data Source
AI summary
A display panel includes a liquid crystal cell, a first polarizing assembly and a second polarizing assembly. The liquid crystal cell includes a first substrate and a second substrate disposed opposite to each other, and a liquid crystal layer disposed between the first substrate and the second substrate. The first polarizing assembly is disposed on a side of the first substrate further away from the liquid crystal layer and includes at least a first polarizing layer having a first transmission axis, and the first polarizing assembly is configured for generating polarized light whose polarization direction is parallel to the first transmission axis. The second polarizing assembly is located on a side of the second substrate further away from the liquid crystal layer and includes at least a transflective layer and a light absorbing layer.