OLED Panel Diversion Modules for Temperature-Induced Color Deviation
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Solution Overview
Problem
Organic light-emitting diode (OLED) displays experience brightness and color deviations due to increased migration rates of light-emitting materials with temperature rises, leading to inconsistent picture quality as different color OLEDs respond differently to temperature changes.
Innovation Solution
An organic light-emitting display panel with diversion modules that adjust current flow through light-emitting components by connecting conduction and diversion control submodules in parallel as temperature increases, reducing brightness increments and maintaining stable color coordinates across temperature ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If temperature increases, then brightness increases, but color coordinates become unstable and picture quality deteriorates
Solution Approach 1:
The patent introduces diversion modules that change the electrical parameters (current flow) of the light-emitting components based on temperature conditions. When temperature exceeds a threshold, the diversion modules activate to adjust the current, thereby compensating for temperature-induced brightness increases and stabilizing color coordinates.
Solution Approach 2:
The patent implements a feedback mechanism where the state of light-emitting components (brightness and color coordinates) is monitored, and diversion modules are activated to provide compensatory current adjustment. This closed-loop approach ensures that color coordinates remain stable despite temperature variations affecting brightness.
2Reliability
If diversion modules are added to stabilize color, then color coordinates stability improves, but device complexity increases
Solution Approach 1:
The patent divides the light-emitting component into multiple segments by introducing separate diversion modules for different color channels (red, green, blue). Each diversion module independently controls the current for its corresponding color sub-component, allowing precise color coordination without requiring complete redesign of the entire display structure.
Solution Approach 2:
The diversion modules serve multiple functions: they act as current control elements for brightness adjustment, color coordinate stabilization, and temperature compensation. This multi-functionality reduces the need for separate dedicated components for each function, thereby limiting the increase in overall device complexity.
3Illumination intensity
If current flow is increased to maintain brightness, then brightness stability improves, but color deviations worsen
Solution Approach 1:
The patent applies different current adjustment strategies to different color channels (red, green, blue) based on their specific characteristics and temperature responses. Each color sub-component receives customized current control through its dedicated diversion module, ensuring that brightness stability is achieved without inducing color deviations that would result from uniform current adjustment.
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 effectively stabilizes brightness and improves picture display effects by managing current flow through light-emitting components, reducing color deviations and maintaining consistent color coordinates across varying temperatures.
Implementation Method 1
thermal expansion coefficients of materials of switches in the first to Mth conduction control submodules are sequentially reduced
Data Source
AI summary
An organic light-emitting display panel and a display device, comprising: multiple light-emitting components; pixel circuits connected one-to-one to the light-emitting components, the pixel circuits being connected to corresponding first poles of the light-emitting components, second poles of the light-emitting components being connected to first power ends; diversion modules corresponding one-to-one to the light-emitting components, wherein the diversion modules are connected at first ends thereof to the corresponding first poles of the light-emitting components and connected at second ends to the corresponding second poles of the light-emitting components, and the diversion modules are used for diversion with respect to the corresponding light-emitting components when the temperature of the organic light-emitting display panel satisfies a selected temperature range.