Display Panel Frame-Timed Light Emission for Low-Frequency Brightness
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Solution Overview
Problem
Display panels experience flickering and brightness inconsistencies under low-frequency driving due to transistor leakage, limiting the range of usable driving frequencies and hindering power consumption reduction.
Innovation Solution
A display panel with a pixel circuit incorporating a driving module and a bias adjustment module, where the bias adjustment transistor adjusts the bias state of the driving transistor by dynamically controlling conduction duration and bias voltage during the holding phase, thereby stabilizing brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display panel is driven at a low frequency to reduce power consumption, then power consumption is reduced, but brightness consistency deteriorates and flickering occurs
Solution Approach 1:
The patent applies dynamics by making the light-emitting duration variable across different frame types. The writing frame uses a first light-emitting duration while holding frames use a second light-emitting duration that is shorter than the first. This dynamic adjustment of the light-emitting duration based on frame type allows the display to maintain brightness consistency during low-frequency operation while still achieving power consumption reduction, thereby resolving the contradiction between power saving and brightness stability.
2Use of energy by moving object
If the display panel is driven at a low frequency, then power consumption is reduced, but flickering occurs in the displayed image
Solution Approach 1:
The patent employs dynamics by dynamically adjusting the light-emitting duration according to the frame type. Writing frames utilize a first light-emitting duration while holding frames utilize a second light-emitting duration that is shorter. This dynamic differentiation prevents the accumulation of leakage charge effects that cause flickering, allowing low-frequency driving without the harmful flickering effect while maintaining power consumption benefits.
3Illumination intensity
If the bias adjustment transistor conduction duration is increased to adjust bias state, then brightness control is improved, but power consumption increases
Solution Approach 1:
The patent applies local quality by differentiating the light-emitting duration based on frame type rather than using a uniform duration for all frames. Writing frames use a first light-emitting duration while holding frames use a shorter second light-emitting duration. This localized differentiation allows effective brightness control during writing operations while reducing power consumption during holding operations, resolving the contradiction between brightness control and power consumption.
Data Source
AI summary
Provided are a display panel and a driving method thereof, and a display device The display panel includes: a pixel circuit, including a driving module and a bias adjustment module having a control terminal connected to a first scan line for providing a first scanning signal, and a first terminal connected to a bias signal line for providing a bias voltage. the display panel has a first frequency, a driving cycle at the first frequency includes a writing frame and holding frames, and the writing frame and the holding frame include at least one light-emitting cycle, respectively; in the light-emitting cycle, a total duration of at least one active level of the first scanning signal is a first duration; and at the first frequency, first durations and/or bias voltages corresponding to at least some holding frames are different from those corresponding to the writing frame.