Stacked Optical Adjustment Layers for High-Resolution Display Panels
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Solution Overview
Problem
Conventional display panels with sub-pixels arranged side by side suffer from low light utilization and resolution due to the spreading arrangement of sub-pixels in a plane perpendicular to light transmission, limiting their ability to achieve high-definition displays and efficient color mixing.
Innovation Solution
A display panel with a polarizer and stacked optical adjustment layers, each comprising a polarization direction-adjusting sub-layer and a quantum rod sub-layer, where the quantum rods emit light of specific colors based on polarization direction and energy, allowing for efficient color mixing and improved resolution by overlapping light-excitement portions with adjusting portions to form desired colors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If sub-pixels are arranged side by side in a plane perpendicular to light transmission, then color display is achieved, but light utilization and resolution are reduced
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement of sub-pixels to a three-dimensional stacked configuration where multiple optical adjustment layers are arranged vertically over the polarizer. This vertical stacking allows light to pass through multiple functional layers in sequence, enabling color mixing and polarization control without requiring lateral separation of color elements, thereby improving both light utilization and resolution
Solution Approach 2:
The patent implements a nested structure where multiple optical adjustment layers (including quantum rod sub-layers and polarization direction-adjusting sub-layers) are stacked one over another. Each layer is positioned within the vertical space above the polarizer, with light-excitement portions nested within adjusting portions, creating a compact multi-functional structure that achieves color display through vertical integration rather than horizontal spreading
2Adaptability or versatility
If sub-pixels are arranged side by side to display different colors, then color variety is achieved, but the area required increases and resolution decreases
Solution Approach 1:
The patent resolves the area efficiency problem by moving color generation from the horizontal plane to the vertical dimension. Multiple optical adjustment layers with different quantum rod materials (emitting different colors) are stacked vertically, allowing a single vertical column to generate multiple colors through selective excitation, thereby maintaining color variety while minimizing the horizontal footprint
Solution Approach 2:
Each vertical column in the stacked structure serves multiple functions: the polarizer generates polarized light, multiple quantum rod sub-layers generate different colors, and polarization direction-adjusting layers control the orientation of light. This multi-functional integration within a compact vertical structure allows a single location to perform what previously required multiple separate sub-pixels across a larger area
3Loss of energy
If multiple optical adjustment layers are stacked to improve color mixing, then light utilization improves, but device complexity increases
Solution Approach 1:
The patent divides the optical adjustment function into multiple specialized layers, each with a specific role: quantum rod sub-layers for wavelength conversion, polarization direction-adjusting sub-layers for orientation control, and light-excitement portions for selective activation. This segmentation allows each layer to be optimized independently while working together to improve overall light utilization efficiency
Solution Approach 2:
The patent introduces polarization direction-adjusting sub-layers as intermediary components between the quantum rod sub-layers and the output. These intermediary layers control the polarization orientation of light passing through each quantum rod layer, enabling precise control over color mixing and transmission while maintaining a manageable structural organization
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 light utilization and resolution by enabling color mixing within a smaller area, comparable to a single sub-pixel, thereby improving the display's efficiency and reducing color cast issues over time.
Implementation Method 1
The quantum rod sub-layer includes a plurality of light-excitement portions and is configured to adjustably change a wavelength of the incident polarized light
Implementation Method 2
The liquid crystal sub-layer contains a plurality of liquid crystals, and the at least one driving electrode is configured to apply an electric field to the liquid crystal sub-layer to adjust an orientation of the plurality of liquid crystals therein to thereby adjustably control the polarization direction of the incident polarized light
Implementation Method 3
The polarizer is configured to convert a light incident from a light-incident surface thereof into a linearly polarized light emitting out from a light-emitting surface thereof
Data Source
AI summary
A display panel includes a polarizer and a plurality of optical adjustment layers stacking over one another over the polarizer. The polarizer converts a light incident from its light-incident surface into a linearly polarized light emitting out from its light-emitting surface. Each optical adjustment layer includes a polarization direction-adjusting sub-layer and a quantum rod sub-layer over the polarization direction-adjusting sub-layer. The polarization direction-adjusting sub-layer includes a plurality of adjusting portions and is configured to adjustably control a polarization direction of an incident polarized light. The quantum rod sub-layer includes a plurality of light-excitement portions, and is configured to adjustably change a wavelength of the incident polarized light. Each light-excitement portions contains a plurality of quantum rods, each having its long axis in a substantially same direction. By adjusting the incident light and controlling the plurality of optical adjustment layers, the display panel can realize a full-color display.