Array Substrate Switching for Uniform Vcom Across Display Panels
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Solution Overview
Problem
Large-size and high-resolution display panels face issues with inconsistent common voltage signals across different areas, leading to display split-screen phenomena and reduced user experience due to the impossibility of manufacturing identical Vcom OP circuits, resulting in uneven common voltages.
Innovation Solution
The introduction of an array substrate with switch units and switch control lines, where first electrodes are multiplexed as common electrodes and receive common voltage signals, ensuring that all electrodes in the same electrode row have the same potential by transmitting a control signal to the switches connected to the switch control line, thereby maintaining consistent common voltages across the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple Vcom OP circuits are used to provide common voltage signals for different areas of large-size display panels, then the common voltage supply capability is improved, but manufacturing inconsistencies cause uneven common voltages and display split-screen phenomena
Solution Approach 1:
The patent merges multiple first electrodes into a single electrically connected unit through switch units. When switches are turned on, first electrodes in the same electrode row are electrically connected to each other, ensuring they receive exactly the same common voltage signal from a single Vcom OP circuit, thereby eliminating display split-screen caused by manufacturing inconsistencies in multiple Vcom OP circuits.
Solution Approach 2:
The patent introduces switch units as intermediary components between the Vcom OP circuit and the first electrodes. These switch units act as mediators that can selectively connect or disconnect electrode rows from the common voltage supply, allowing precise control over which electrodes receive the common voltage signal and ensuring voltage consistency across the display panel.
2Manufacturing precision
If switch units are introduced to electrically connect first electrodes, then common voltage consistency is improved, but device complexity increases
Solution Approach 1:
The switch units serve multiple functions: they act as switches to control electrical connection, serve as part of the common electrode structure, and enable both display and touch detection modes. This multi-functionality reduces the need for separate components and minimizes overall device complexity while achieving voltage consistency.
Solution Approach 2:
The patent segments the control of first electrodes into manageable groups controlled by individual switch units. Each switch unit independently controls a specific electrode row, allowing for simplified modular design and control logic compared to a fully interconnected system, thereby reducing overall device complexity.
Data Source
AI summary
The array substrate at least includes a plurality of electrode rows, a plurality of switch control lines and a plurality of switch units in a display area; each electrode row corresponds to at least one switch control line, each first electrode corresponds to one switch unit, and each switch unit includes at least one first switch; and in one of the electrode rows: the control terminal of at least one first switch in each switch unit in the one electrode row is connected to the same switch control line, the first poles of the first switches connected to the same switch control line are electrically connected to the first electrodes respectively, and the second poles of the first switches connected to the same switch control line are electrically connected to one another.