Display Panel Driving Control for Flicker-Free Luminance Shifts
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Solution Overview
Problem
Display devices experience flickering phenomena when luminance is increased in dark environments, making it difficult to view images effectively.
Innovation Solution
A display device with a power supply system that controls voltage changes to prevent flickering by adjusting driving power and initialization power levels in response to luminance control signals, using a timing controller to manage pixel operations and emission control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the luminance of the display device is increased to improve visibility in dark environments, then the visibility is improved, but a flickering phenomenon occurs
Solution Approach 1:
The patent applies dynamics by making the second driving power voltage adjustable and time-dependent. The power supply dynamically changes the voltage level based on the state of the luminance control signal, transitioning between different voltage levels to control luminance changes and prevent flickering while maintaining visibility improvement.
Solution Approach 2:
The patent changes the voltage parameter of the second driving power supplied to the second power line. By adjusting this voltage parameter in response to luminance control signals, the system controls the rate and magnitude of luminance changes, thereby preventing flickering while allowing luminance to be increased for better visibility.
2Adaptability or versatility
If the maximum luminance changes rapidly to adapt to environment, then the adaptability is improved, but flickering occurs due to abrupt luminance transitions
Solution Approach 1:
The system dynamically adjusts the second driving power voltage based on luminance control signals, enabling the display to adapt to different environmental conditions while maintaining stable luminance transitions. The dynamic voltage control prevents abrupt changes that would cause flickering.
Solution Approach 2:
The second driving power voltage acts as an intermediary between the luminance control signal and the actual luminance output. By controlling this intermediate voltage parameter, the system mediates the transition between different luminance states, ensuring smooth adaptation without direct abrupt changes.
Data Source
AI summary
A display device includes: a power supply configured to supply a voltage of first driving power to a first power line, and supply a voltage of second driving power to a second power line; a display panel including pixels connected to scan lines and data lines, and each including a first transistor configured to control current supplied from the first power line to the second power line via a light emitting element; and a timing controller configured to supply a luminance control signal to the pixels. Each of the pixels includes: a control transistor connected in parallel to some sub-transistors of the corresponding first transistor, and configured to be turned on in response to receipt of a luminance control signal having an enabled state. The power supply changes the voltage of the second driving power when the luminance control signal having the enabled state is supplied to the pixels.