Multi-Frequency Display Panel Driving with Boundary Region Control
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Solution Overview
Problem
Existing organic light-emitting diode display devices face challenges in reducing power consumption while maintaining display quality, particularly in scenarios where different images are displayed on a single device, leading to potential brightness differences and afterimage effects across display regions.
Innovation Solution
A display device with a driving controller that divides the display panel into regions and adjusts driving frequencies, using a multi-frequency mode to operate the first display region at a higher frequency and the second region at a lower frequency, with a boundary region having frequencies between the two, to minimize brightness differences and afterimage effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If a single driving frequency is used for the entire display panel, then the device structure is simple and easy to control, but power consumption increases and display quality deteriorates in multi-region display scenarios
Solution Approach 1:
The display panel is divided into multiple display regions (first display region, second display region, and boundary region), each independently controlled with different driving frequencies. This segmentation allows the first and second display regions to operate at lower frequencies to reduce power consumption, while the boundary region operates at a higher frequency to maintain display quality and prevent artifacts at the transition zone.
Solution Approach 2:
Different driving frequencies are applied to different spatial locations of the display panel. The boundary region, which is critical for preventing display artifacts, receives a higher driving frequency (third driving frequency) compared to the interior regions. This local quality adjustment ensures that power consumption is reduced in non-critical areas while maintaining high display quality in critical areas.
2Use of energy by stationary object
If different driving frequencies are applied to different display regions, then power consumption is reduced, but brightness differences and afterimage effects may occur at region boundaries
Solution Approach 1:
The boundary region acts as an intermediary zone between the first and second display regions. It is driven at a third driving frequency that is higher than the frequencies used in the interior regions. This intermediary region with higher frequency driving prevents brightness differences and afterimage effects by ensuring that the transition between different frequency zones does not create visible artifacts, thus maintaining display quality consistency.
Solution Approach 2:
The boundary region is proactively driven at a higher frequency to preemptively counteract potential display artifacts before they occur. By anticipating the problem of brightness differences and afterimage effects at frequency transitions, the system applies a higher driving frequency in advance in the boundary region, preventing these artifacts from manifesting and ensuring consistent display quality.
3Reliability
If the entire display panel is driven at high frequency, then display quality is maintained, but power consumption increases
Solution Approach 1:
The display panel is segmented into interior regions and boundary regions, with each segment receiving appropriate driving frequencies. Interior regions (first and second display regions) are driven at lower frequencies to reduce power consumption, while boundary regions are driven at higher frequencies to maintain display quality and prevent artifacts. This segmentation strategy achieves both power savings and quality maintenance simultaneously.
Solution Approach 2:
The driving frequency parameter is dynamically adjusted based on the spatial location within the display panel. Instead of using a uniform high frequency across the entire panel, the system changes the frequency parameter locally - using lower frequencies in interior regions and higher frequencies in boundary regions. This parameter change strategy reduces overall power consumption while maintaining display quality in critical areas.
Data Source
AI summary
Provided is a display device. The display device includes a display panel including a plurality of pixels respectively connected to a plurality of data lines and a plurality of scan lines, a data driving circuit configured to drive the plurality of data lines, a scan driving circuit configured to drive the plurality of scan lines, and a driving controller configured to divide the display panel into a first display region and a second display region during a multi-frequency mode, and control the data driving circuit and the scan driving circuit so as to drive the first display region at a first driving frequency and drive the second display region at a second driving frequency lower than the first driving frequency, wherein, during the multi-frequency mode, the driving controller sets a frequency for each of horizontal lines in a boundary region, which is adjacent to the first display region, in the second display region to a third driving frequency between the first driving frequency and the second driving frequency.