OLED Data Line Driving With Adaptive Charge Current Control
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Solution Overview
Problem
In OLED display panels, the voltage of data signals on data lines does not switch instantaneously, leading to display inaccuracies and increased power consumption and heat generation when uniform charge currents are used to accelerate signal writing.
Innovation Solution
A driving method that adjusts charge currents based on the voltage difference between adjacent stages of data signals, dynamically determining the current according to the voltage difference to ensure accurate and efficient signal writing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If uniform charge currents are used to accelerate data signal writing, then writing speed is improved, but power consumption and heat generation increase
Solution Approach 1:
The patent applies dynamics by transitioning from uniform static charge currents to dynamic adaptive charge currents. The charge current for each data line is adjusted in real-time based on the voltage difference between adjacent stages, allowing the system to optimize writing speed while minimizing power consumption and heat generation for each individual data line.
Solution Approach 2:
The patent changes the parameter of charge current from a fixed uniform value to a variable value that depends on the voltage difference. By calculating the voltage difference between adjacent stages and using it to determine the charge current magnitude, the system achieves efficient signal writing without excessive power consumption or heat generation.
2Speed
If uniform charge currents are used to accelerate data signal writing, then writing speed is improved, but display accuracy deteriorates
Solution Approach 1:
The patent applies local quality by treating each data line individually with its own specific charge current value. Instead of applying a uniform charge current to all data lines, the system calculates and applies customized charge currents based on the voltage difference of each data line, ensuring optimal writing speed and accuracy for each local region.
Solution Approach 2:
The patent changes the charge current parameter from a uniform value to a variable value that reflects the actual voltage difference. This parameter adaptation ensures that each data line receives the appropriate charge current needed to achieve accurate voltage switching without overshooting or undershooting, thereby maintaining display accuracy while improving writing speed.
3Loss of time
If higher charge currents are used to switch voltage faster, then response time is reduced, but heat generation increases
Solution Approach 1:
The patent applies dynamics by making the charge current adaptive rather than static. The charge current is dynamically adjusted based on the voltage difference between adjacent stages, allowing the system to achieve fast voltage switching when needed while minimizing heat generation when smaller voltage changes are sufficient.
Solution Approach 2:
The patent changes the charge current parameter from a fixed high value to a variable value that scales with the voltage difference. This parameter adaptation allows the system to reduce heat generation by using lower charge currents for small voltage changes while still achieving fast switching when large voltage changes are required.
Data Source
AI summary
Provided are a driving method for a display panel, and a display device. The display panel includes multiple pixels arranged in an array and multiple data lines, pixels located in the same column are electrically connected to the same data line, and the multiple data lines are configured to provide data signals for the multiple pixels in stages. The driving method includes acquiring a voltage difference between data signals provided for each data line in two adjacent stages; determining a charge current of each data line according to the voltage difference; and providing the data signal for each data line with the charge current.