AMOLED Sub-pixel Resonator Thickness and PenTile Arrangement
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Solution Overview
Problem
Traditional AMOLED display devices face challenges in reducing power consumption while maintaining high color saturation, as OLED devices emitting red or blue lights with high color purity suffer from decreased luminous efficiency, whereas light blue and orange OLED devices have higher efficiencies, necessitating a more efficient sub-pixel arrangement.
Innovation Solution
Incorporating light blue and orange sub-pixels into the AMOLED display device with a PenTile arrangement and varying resonator adjustment layer thicknesses, where the green sub-pixel is central and blue, red, light blue, and orange sub-pixels are arranged around it, with specific thickness ranges for each resonator adjustment layer to optimize luminous efficiency and color purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If OLED devices emit red or blue lights with high color purity, then color saturation is improved, but luminous efficiency decreases
Solution Approach 1:
The display device segments the traditional three-color (RGB) pixel structure into a five-color structure by adding light blue and orange sub-pixels. This segmentation allows the device to use high-efficiency light blue and orange sub-pixels for blue and red color representation respectively, while maintaining high color purity through the green sub-pixel, thereby resolving the contradiction between color saturation and luminous efficiency
Solution Approach 2:
Different sub-pixels are assigned different resonator adjustment layer thicknesses optimized for their specific color emission characteristics. The green sub-pixel maintains its high reflective efficiency with a specific thickness range, while light blue and orange sub-pixels have different thicknesses optimized for their wavelengths, allowing each local region to operate at peak efficiency
2Loss of energy
If light blue and orange OLED devices are used instead of blue and red, then luminous efficiency is improved, but device complexity increases
Solution Approach 1:
The patent merges the functions of traditional red and blue sub-pixels with newly added light blue and orange sub-pixels in a unified five-color PenTile arrangement. This combining approach allows shared sub-pixels between adjacent pixels, reducing the total number of sub-pixels needed while maintaining high luminous efficiency through the use of light blue and orange OLED devices
Solution Approach 2:
The added light blue and orange sub-pixels serve multiple functions: they provide high-efficiency blue and red color representation, enable color conversion for traditional RGB compatibility, and can be shared across multiple pixel units in the PenTile arrangement, thereby reducing overall device complexity despite the increased sub-pixel types
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 configuration reduces power consumption and maintains high color saturation by leveraging the higher efficiencies of light blue and orange sub-pixels, while the green sub-pixel maintains its high reflective efficiency, resulting in a 15% reduction in the color area generated by sub-pixels with high color purity.
Implementation Method 1
each sub-pixel comprises a resonator adjustment layer, and the resonator adjustment layer in any one of the sub-pixels is different in thickness from the resonator adjustment layer in other sub-pixels
Data Source
AI summary
One embodiment of the present invention discloses an AMOLED display device and a method for producing the sub-pixels thereof. To change the metal masks used for forming the resonator adjustment layer in sub-pixels to form the sub-pixels with resonator adjustment layers in different thicknesses. On other hands, a light blue sub-pixel and an orange sub-pixel are added into a pixel unit to form the pixel unit consisting of a blue sub-pixel, a red sub-pixel, a green sub-pixel, a light blue sub-pixel and an orange sub-pixel. The AMOLED with the above features can reduce the power consumption in the display screen greatly, and can maintain the high color saturation.