LTPO Display Panel Refresh Zoning for Luminance Boundary Control
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Solution Overview
Problem
The display effect of LTPO display panels is affected by distinct luminance boundaries due to inconsistent optical parameters between pixel circuits with high and low refresh rates in adjacent regions, which are difficult to maintain.
Innovation Solution
The display panel is divided into dynamic refresh regions with varying refresh rates, including first and second dynamic refresh regions, transition refresh regions, and a static retention region, with gradual transitions in refresh rates to minimize luminance differences, and a gating signal correction mechanism to adjust gate drive signals accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display panel uses different refresh rates in adjacent regions to reduce power consumption, then energy efficiency is improved, but distinct luminance boundaries appear between regions with inconsistent optical parameters
Solution Approach 1:
The display panel is segmented into multiple refresh rate zones (first refresh rate zone, second refresh rate zone, and transition zone) with different refresh rates. This segmentation allows different regions to operate at optimal refresh rates for their specific content requirements, reducing overall power consumption while maintaining display quality through the intermediate transition zone that gradually adjusts optical parameters.
Solution Approach 2:
Different regions of the display panel are assigned different refresh rates according to local content requirements. The first refresh rate zone uses a higher refresh rate for content requiring smooth motion, while the second refresh rate zone uses a lower refresh rate for static or less dynamic content, optimizing power consumption locally while maintaining overall luminance consistency through the transition zone.
2Use of energy by moving object
If the display panel divides regions with different refresh rates directly adjacent to each other, then power consumption is reduced, but the distinct luminance boundaries become more pronounced and difficult to maintain
Solution Approach 1:
A transition zone is introduced as an intermediary region between the first refresh rate zone and the second refresh rate zone. This transition zone contains pixel units with refresh rates that gradually change from the first refresh rate to the second refresh rate, acting as a buffer that smooths the optical parameter transitions and eliminates abrupt luminance boundaries that would otherwise occur at the direct interface between different refresh rate regions.
Solution Approach 2:
The refresh rate parameter is gradually changed across the transition zone from the first refresh rate to the second refresh rate. This gradual parameter change ensures that optical parameters transition smoothly between regions, preventing the formation of distinct luminance boundaries while still achieving the power consumption benefits of having different refresh rates in different regions.
Data Source
AI summary
Provided is a display panel. The display panel is provided with a display region, and the display panel includes: a plurality of pixel units disposed in arrays in the display region; the display region is divided into a first dynamic refresh region, a second dynamic refresh region, and at least one first transition refresh region between the first dynamic refresh region and the second dynamic refresh region; a refresh rate of pixel units in the first dynamic refresh region is different from a refresh rate of pixel units in the second dynamic refresh region; a refresh rate of pixel units in each of the first transition refresh regions is between the refresh rates of the pixel units in the first dynamic refresh region and the second dynamic refresh region.