3D Recess AMOLED Sub-pixel Structure for High PPI Power Efficiency
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Solution Overview
Problem
High PPI (pixels per inch) in AMOLED panels leads to reduced aperture ratios, increasing power consumption, and existing methods to maintain high PPI without reducing aperture ratios are inefficient, complex, and costly, with issues like display effect degradation and redundant voltage supply causing power wastage.
Innovation Solution
The introduction of a three-dimensional recess in the insulating layer below sub-pixels increases the light emitting area, balances sub-pixel voltages, and adjusts surface areas to decrease current density and power consumption, while maintaining high PPI without reducing aperture ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high PPI is implemented in AMOLED panels, then display resolution is improved, but aperture ratio is reduced and power consumption increases
Solution Approach 1:
The patent introduces a three-dimensional recess structure in the insulating layer below sub-pixels, transforming the traditionally two-dimensional planar light emitting area into a three-dimensional configuration. This dimensional change allows the light emitting layer to extend vertically into the recess, increasing the effective light emitting area without increasing the horizontal footprint, thereby maintaining high aperture ratio even at high PPI resolutions
Solution Approach 2:
The patent modifies the physical parameters of the light emitting structure by creating recesses with specific depth and surface area ratios. By controlling the depth of the recess (e.g., 1-5 μm) and adjusting the surface area of the light emitting layer within the recess, the patent optimizes the light emitting efficiency and current density distribution, reducing power consumption while maintaining high resolution
2Measurement precision
If aperture ratio is reduced to achieve high PPI, then display resolution is improved, but light emitting area is reduced and current density increases
Solution Approach 1:
The patent utilizes the vertical dimension by creating recesses in the insulating layer, allowing the light emitting layer to extend downward into the recess space. This three-dimensional configuration increases the total light emitting area without increasing the horizontal aperture ratio, thus maintaining both high resolution and sufficient light emitting area
Solution Approach 2:
The light emitting layer is nested within the three-dimensional recess structure, with the organic light emitting layer positioned inside the recess cavity. This nesting arrangement maximizes the use of available space, allowing the light emitting material to occupy the vertical volume of the recess, thereby increasing the effective light emitting area within the constrained horizontal aperture
3Area of stationary object
If color rendering method is used to maintain high PPI without reducing aperture ratio, then aperture ratio is maintained, but display effect is degraded and circuit complexity increases
Solution Approach 1:
The patent employs a three-dimensional recess structure that physically increases the light emitting area, eliminating the need for complex color rendering circuits or algorithms. The structural solution in the third dimension replaces the need for software or circuit-based compensation methods, thereby reducing overall system complexity while maintaining both high aperture ratio and high resolution
Solution Approach 2:
The patent uses the three-dimensional recess structure to create additional light emitting surface area that effectively compensates for the limited horizontal aperture. This physical copying of the light emitting function in the vertical dimension replaces the need for complex color rendering techniques, simplifying the overall system architecture
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 approach effectively increases the light emitting area, decreases current density, and mitigates redundant voltage supplies, resulting in reduced power consumption and improved display efficiency without increasing voltage or power usage.
Implementation Method 1
an organic light emitting layer formed in the plurality of openings to correspondingly form the plurality of sub-pixels
Data Source
AI summary
The present disclosure provides a display device and a manufacture method thereof. The pixel definition layer includes a plurality of openings. The organic light emitting layer includes an opening region of the transparent conductive layer and a non-opening region of the transparent conductive layer. The opening region of the transparent conductive layer † disposed in the plurality of openings of the pixel definition layer. The organic light emitting layer being formed over the opening region of the transparent conductive layer to correspondingly form the plurality of sub-pixels. A three-dimensional recess is disposed in the substrate module below at least one of the color sub-pixels, each three-dimensional recess corresponds to one of the openings. The opening region of the transparent conductive layer and the organic light emitting layer are disposed in the three-dimensional recess.