Integrated Touch Display Panel Overlapping Lead Lines
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Solution Overview
Problem
The integration of touch control and display structures on a single substrate in display panels often leads to wiring and circuit configuration challenges in the peripheral regions, compromising the reliability of display products due to potential wiring damages and uneven substrate surfaces.
Innovation Solution
The implementation of an integrated touch control display panel with overlapping lead lines for data and touch control signals, where a conductive layer insulated from the data lines provides electrical connection to the touch control signal lines, reducing disconnection probabilities and enhancing reliability by smoothing the substrate surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If touch control structure is integrated into display panel on the same substrate, then the thickness of display panel is reduced and touch control function is supported, but the circuit and wiring configuration in the peripheral region becomes complex and reliability is jeopardized
Solution Approach 1:
The patent applies dimensionality change by routing lead lines in different layers (first lead lines in a first metal layer, second lead lines in a second metal layer) and using a conductive layer to bridge them. This vertical stacking arrangement in the thickness dimension allows signal lines to overlap without interfering with each other, reducing planar wiring complexity while maintaining reliability.
Solution Approach 2:
The conductive layer acts as an intermediary element between the first lead lines and second lead lines. It provides electrical connection between the overlapping lead lines while being insulated from the first lead lines, enabling signal transmission without direct contact between different signal types and preventing interference.
2Adaptability or versatility
If lead lines for data and touch control signals are configured outside the display region on the same substrate, then integration is achieved, but wiring damages and disconnection probabilities increase
Solution Approach 1:
The patent resolves wiring conflicts by transitioning from a two-dimensional planar arrangement to a three-dimensional layered structure. Lead lines are routed in different metal layers and connected vertically through the conductive layer, allowing data lines and touch control lines to occupy the same peripheral region without physical interference, thereby maintaining integration while improving wiring reliability.
Solution Approach 2:
The conductive layer serves as an intermediary connection mechanism that bridges overlapping lead lines from different layers. It enables electrical connectivity between the first lead lines (for data) and second lead lines (for touch control signals) while maintaining physical separation and insulation, thus preventing wiring damages and reducing disconnection probabilities.
3Area of stationary object
If lead lines overlap in the same peripheral region, then space utilization is improved, but substrate surface unevenness and disconnection risks increase
Solution Approach 1:
The patent addresses substrate surface unevenness by utilizing the thickness dimension to separate lead lines into different metal layers. This vertical separation allows lead lines to overlap in the planar view without causing surface unevenness, as each layer maintains its own flat substrate interface. The conductive layer provides the necessary connection while preserving surface flatness.
Data Source
AI summary
The present disclosure provides an integrated touch control display panel, including a first substrate, a plurality of data lines supplying display signals to display pixels, a plurality of touch control signal lines carrying touch control signals for touch control electrodes, a plurality of first lead lines for the data lines configured outside a display region, a plurality of second lead lines for the touch control signal lines configured outside the display region, and a conductive layer configured adjacent to the second lead lines. In a direction perpendicular to the first substrate, the first lead lines overlap with the second lead lines in an overlapping region. The second lead lines are configured on the side of the first lead lines facing away from the first substrate. The conductive layer is insulated from the first lead lines, and is electrically connected to the second lead lines.