Gray-Voltage Adaptive Display Panel Control for LTPO Flicker
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Solution Overview
Problem
Existing OLED display technologies face challenges in maintaining display quality at low frame rates, particularly in reducing flicker effects and power consumption while utilizing Low Temperature Polycrystalline Oxide (LTPO) technology, which operates at refresh frequencies lower than 60 Hz.
Innovation Solution
A control method and apparatus that convert gray data into gray voltage, calculate an average gray voltage, and determine display parameters to output control signals such as display data keep and anode reset signals, optimizing display stages for improved display effect and reduced flicker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the refresh frequency is reduced below 60 Hz to lower power consumption, then energy efficiency improves, but display quality deteriorates due to flicker effects
Solution Approach 1:
The patent dynamically adjusts the refresh frequency of the display panel based on the average gray voltage of the display picture. When the average gray voltage is within a first voltage range, the refresh frequency is set to a first frequency (below 60 Hz); when it exceeds this range, the frequency switches to a second frequency (60 Hz or higher). This dynamic adaptation resolves the contradiction by optimizing power consumption while maintaining display quality through frequency switching.
Solution Approach 2:
The patent changes the refresh frequency parameter based on the calculated average gray voltage of the display picture. By monitoring the voltage parameter and adjusting the frequency accordingly, the system achieves energy efficiency when conditions permit while preventing flicker-induced quality degradation when necessary.
2Use of energy by moving object
If the refresh frequency is reduced below 60 Hz to reduce power consumption, then energy efficiency improves, but flicker effects increase
Solution Approach 1:
The patent changes the refresh frequency parameter based on the calculated average gray voltage of the display picture. By monitoring the voltage parameter and adjusting the frequency accordingly, the system achieves energy efficiency when conditions permit while preventing flicker-induced quality degradation when necessary.
Solution Approach 2:
The system calculates the average gray voltage from the display picture and uses this feedback to determine the appropriate refresh frequency. This closed-loop control ensures that flicker effects are suppressed by switching to higher frequencies when the voltage indicates potential quality issues, while allowing low-frequency operation for power efficiency when conditions are favorable.
3Reliability
If gray voltage is dynamically adjusted based on average gray voltage, then display quality improves, but control complexity increases
Solution Approach 1:
The patent segments the control process into distinct stages: calculating average gray voltage from the display picture, comparing it against reference values, and selectively applying different control signals (first control signal for refresh, second control signal for keeping) based on the comparison result. This segmentation manages complexity by breaking down the dynamic control into manageable, condition-based steps.
Solution Approach 2:
The patent dynamically adjusts the refresh frequency of the display panel based on the average gray voltage of the display picture. When the average gray voltage is within a first voltage range, the refresh frequency is set to a first frequency (below 60 Hz); when it exceeds this range, the frequency switches to a second frequency (60 Hz or higher). This dynamic adaptation resolves the contradiction by optimizing power consumption while maintaining display quality through frequency switching.
Data Source
AI summary
A control method for a display panel includes: converting gray data of a display picture into a gray voltage at a first refresh frequency; calculating an average gray voltage of the display picture according to the gray voltage of the display picture; determining, according to the average gray voltage of the display picture, a display parameter matched with the display picture; and outputting a control signal of the display picture to the display panel, according to the display parameter matched with the display picture. The control signal includes at least one of the followings: a data keep signal, and an anode reset signal of a light emitting element of the display panel.