Gate Driving Unit Dummy Stage for Display Luminance Uniformity
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Solution Overview
Problem
Existing display devices face challenges in achieving uniform luminance across regions, particularly between the imaging region and the display region, due to resistance deviations in gate lines.
Innovation Solution
The display device incorporates a gate driving unit with a plurality of stages and a dummy stage connected in parallel to at least one of the stages, as well as a sub-output buffer connected in parallel to specific stages, to improve the resistance deviation of gate lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single gate driving unit is used for both display region and imaging region, then device complexity is reduced, but resistance deviation between regions increases
Solution Approach 1:
The gate driving unit is segmented into multiple independent stages: a first gate driving unit for the display region and a second gate driving unit for the imaging region. Each stage independently controls gate lines for its respective region, allowing separate optimization of driving parameters to compensate for resistance deviations and achieve uniform luminance across both regions.
2Ease of manufacture
If gate lines are extended to cover both regions, then ease of manufacture is improved, but resistance deviation increases
Solution Approach 1:
Gate lines are segmented into separate groups: first gate lines extending across the display region controlled by the first gate driving unit, and second gate lines extending across the imaging region controlled by the second gate driving unit. This segmentation allows each gate line group to be optimized for its specific region's resistance characteristics, maintaining signal consistency despite different path lengths.
3Manufacturing precision
If a dummy stage is added to the gate driving unit, then luminance uniformity is improved, but device complexity increases
Solution Approach 1:
A dummy stage is introduced as an intermediary component in the second gate driving unit. This dummy stage receives gate signals from the first gate driving unit and re-transmits them to the second gate lines, acting as a signal mediator that compensates for resistance deviations in the imaging region while maintaining a relatively simple overall structure.
Data Source
AI summary
Embodiments disclose a display device including a display panel including a first display region having a plurality of first pixels, and a second display region having a plurality of second pixels and a plurality of light-transmitting regions, a plurality of data lines through which data signals of the plurality of first pixels and the plurality of second pixels are output, a plurality of gate lines through which gate signals of the plurality of first pixels and the plurality of second pixels are output, and a gate driving unit including a plurality of stages configured to output the gate signals to the plurality of gate lines and a dummy stage connected in parallel to at least one of the plurality of stages.