Display Power Controller Dynamic Transient Time Control
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Solution Overview
Problem
Display devices face issues with luminance differences and flicker when the driving voltage is changed, as existing power controllers maintain a constant transient time for voltage level changes, leading to suboptimal display quality.
Innovation Solution
A display device and electronic device configuration that includes a power controller capable of determining transient times for driving voltage changes based on power control signals, allowing for selection between different transient speeds and modes to optimize voltage transitions, thereby preventing luminance differences and flicker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the driving voltage is changed to adjust driving frequency or decrease power consumption, then power consumption is reduced, but luminance differences and flicker occur leading to degraded display quality
Solution Approach 1:
The power controller dynamically adjusts the transient time of driving voltage changes based on the current driving voltage level. When the driving voltage is at a first level, a first transient time is applied, and when at a second level, a second transient time is applied. This dynamic adjustment prevents luminance differences and flicker while allowing voltage changes for power consumption optimization.
Solution Approach 2:
The patent changes the transient time parameter of the driving voltage based on the driving voltage level. By modifying this temporal parameter dynamically, the system maintains display quality (preventing luminance differences and flicker) while still enabling voltage changes for power management.
2Device complexity
If a constant transient time is used for driving voltage changes, then the power controller operation is simplified, but luminance differences and flicker occur reducing display quality
Solution Approach 1:
The power controller transitions from a static constant transient time approach to a dynamic approach where the transient time varies based on the driving voltage level. This dynamic adaptation eliminates luminance differences and flicker while maintaining reasonable controller complexity through systematic voltage-level-based selection.
3Speed
If the driving voltage is changed rapidly to improve response speed, then the voltage transition is faster, but luminance differences and flicker occur
Solution Approach 1:
The transient time (inverse of transition speed) is dynamically adjusted based on the driving voltage level. At certain voltage levels, faster transitions are permitted, while at other levels, slower transitions prevent luminance differences and flicker. This creates an optimal balance between speed and display quality across different operating conditions.
Data Source
AI summary
A display device includes a display panel including a plurality of pixels, a data driver configured to provide a data signal to the pixels, a scan driver configured to provide a scan signal to the pixels, a power controller configured to provide a driving voltage to the data driver and the scan driver, and a timing controller configured to generate a data control signal that controls the data driver, a scan control signal that controls the scan driver, and a power control signal that controls the power controller based on an image data and a control signal. The power controller determines a transient time that changes the driving voltage from a first voltage level to a second voltage level based on the power control signal.