OLED Panel Aging to Equalize RGB Attenuation Rates
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Solution Overview
Problem
OLED display panels experience color shift and afterimage issues due to uneven lifetime attenuation of red, green, and blue organic materials, leading to rapid brightness loss and non-uniform color representation over time.
Innovation Solution
A method involving an ageing treatment unit, test unit, and processing unit that performs luminescent lifetime attenuation tests and adjusts voltage inputs to monochromatic luminescent devices to equalize their attenuation rates, ensuring consistent brightness and preventing color shift by rapidly consuming the early stage service life and normalizing attenuation rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If FMM vacuum vaporization method is used to manufacture OLED display panels, then high resolution and image quality are achieved, but color shift occurs due to different lifetime attenuation rates of RGB organic materials
Solution Approach 1:
The patent applies preliminary action by conducting accelerated aging treatments on the OLED display panel before it is delivered to the customer. The panel undergoes multiple aging cycles with different voltage inputs to pre-consume the early stage service life where rapid brightness attenuation occurs. This preliminary aging process equalizes the lifetime attenuation rates of RGB organic materials, so that when the product is used normally, the color shift problem is significantly reduced or eliminated.
2Productivity
If high voltage is applied to accelerate aging treatment, then lifetime attenuation is rapidly consumed, but brightness loss increases during the aging process
Solution Approach 1:
The patent applies periodic action by implementing multiple aging cycles with alternating high and low voltage inputs. Each aging cycle consists of a high voltage phase to accelerate aging and a low voltage phase to minimize brightness loss. The system switches between these phases repeatedly, allowing the organic materials to undergo accelerated aging while recovering brightness between cycles. This periodic voltage adjustment enables effective lifetime attenuation equalization without causing excessive permanent brightness loss.
3Stability of the object's composition
If multiple aging cycles are performed to equalize attenuation rates, then color shift is prevented, but treatment time increases
Solution Approach 1:
The patent applies dynamics by making the aging treatment process adaptive and flexible. The system dynamically adjusts the number of aging cycles, voltage levels, and treatment durations based on real-time monitoring of the OLED panel's performance. The aging treatment continues until the attenuation rates of RGB materials are sufficiently equalized, at which point the process stops. This dynamic adjustment prevents unnecessary time consumption while ensuring adequate equalization, optimizing the balance between treatment effectiveness and time efficiency.
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 method effectively prevents color shift and afterimage issues by normalizing the lifetime attenuation rates of OLED display panel components, ensuring consistent brightness and improved image quality over time.
Implementation Method 1
monochromatic luminescent devices in the OLED display panel
Data Source
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AI summary
A method and device for correcting a color shift of an OLED display panel, and a display device are disclosed. The method includes: performing an ageing treatment on the monochromatic luminescent devices in the OLED display panel; performing a luminescent lifetime attenuation test on the monochromatic luminescent devices after the ageing treatment respectively, and obtaining corresponding luminescent lifetime attenuation rates of the monochromatic luminescent devices; and performing an ageing treatment on the monochromatic luminescent device with rapidest luminescent lifetime attenuation rate again when differences between the luminescent lifetime attenuation rates of the monochromatic luminescent devices are greater than a preset threshold, until differences between the luminescent lifetime attenuation rates of the monochromatic luminescent devices are less than the preset threshold. The method effectively corrects the color shift phenomenon of display images of an OLED display product after long-term use.