Display Panel Voltage Control for Low-Luminance Black Stability
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Solution Overview
Problem
Existing display devices face challenges in maintaining image quality at low luminance levels, particularly in preventing black luminance from increasing and improving response speed and temperature characteristics.
Innovation Solution
A display device that determines the difference between a first initialization voltage and a first power voltage based on input luminance, adjusting these voltages to maintain optimal luminance and image quality by integrating a driving controller to manage power and data drivers, and providing additional power voltages as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the first power voltage is increased to improve response speed at low luminance, then response speed is improved, but black luminance increases
Solution Approach 1:
The patent dynamically adjusts the first power voltage based on input luminance conditions. At low luminance levels, the first power voltage is increased to improve response speed, while at normal luminance levels, it is maintained at a standard level to prevent black luminance increase. This parameter change strategy resolves the contradiction by adapting the voltage level to operational conditions.
Solution Approach 2:
The patent implements dynamic control of the first power voltage through the driving controller, which adjusts the voltage in real-time based on the input luminance. This dynamic adjustment allows the system to optimize response speed when needed while maintaining black luminance control under normal conditions, resolving the static trade-off between response speed and black luminance.
2Temperature
If the difference between the first initialization voltage and the first power voltage is increased to improve temperature characteristics, then temperature characteristics are improved, but black luminance increases
Solution Approach 1:
The patent dynamically adjusts the voltage difference between the first initialization voltage and the first power voltage based on input luminance. At low luminance levels, the difference is increased to improve temperature characteristics, while at normal luminance levels, the difference is maintained at a standard level to prevent black luminance increase. This conditional parameter adjustment resolves the contradiction.
3Device complexity
If fixed power voltages are used to simplify the driving controller, then device complexity is reduced, but image quality at low luminance deteriorates
Solution Approach 1:
The patent introduces dynamic adjustment capability to the driving controller, enabling it to modify the first power voltage and first initialization voltage based on input luminance conditions. This dynamic control improves image quality at low luminance levels by optimizing voltage parameters, while the overall control logic remains integrated within the existing driving controller framework.
Data Source
AI summary
A display device includes a display panel including a pixel, a data driver which provides a data voltage to the pixel, a power voltage generator which provides a first initialization voltage and a first power voltage to the pixel, and a driving controller which controls the data driver and the power voltage generator, and the driving controller determines a difference between the first initialization voltage and the first power voltage based on an input luminance.