Display Panel Shielding Between Data and Fingerprint Readout Lines
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Solution Overview
Problem
Existing display devices face challenges in efficiently integrating fingerprint sensing capabilities with display functionalities, particularly in managing the complex interconnectivity and layout of data and readout lines in the peripheral regions.
Innovation Solution
A display panel design that includes a conductive layer between data and readout lines, reduced number of extension lines, and a multiplexer configuration to optimize the layout and reduce overlap, allowing for efficient integration of fingerprint sensors and display pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data lines and readout lines are extended to the peripheral region for connecting pixels and sensors, then electrical connectivity is improved, but line overlap and signal interference increase
Solution Approach 1:
A conductive layer is introduced as an intermediary component between the data lines and readout lines in the peripheral region. This conductive layer, connected to a constant voltage or ground, acts as a shielding mechanism that reduces electromagnetic interference between the two types of lines while maintaining their electrical connectivity to pixels and sensors.
2Reliability
If multiple extension lines are provided to connect all readout lines to the driver chip, then signal transmission completeness is improved, but device complexity and layout difficulty increase
Solution Approach 1:
The patent implements a multiplexer that allows a single extension line to serve multiple readout lines by selectively connecting them based on control signals. This multi-functional approach enables one extension line to replace what would traditionally require multiple separate lines, thereby reducing the total number of extension lines needed while maintaining complete signal transmission capability.
Solution Approach 2:
Multiple readout lines are merged into a single extension line through the multiplexer in the peripheral region. Instead of providing separate extension lines for each readout line, the patent combines their functions through the multiplexer, which routes signals from multiple readout lines through a shared extension line to the driver chip, reducing layout complexity.
3Adaptability or versatility
If sensors and pixels are integrated in the active region, then device functionality is improved, but layout complexity and signal interference increase
Solution Approach 1:
The patent segments the functional regions by placing pixels and sensors in the active region while introducing a conductive shielding layer in the peripheral region. This spatial segmentation allows the active region to maintain high functionality with both pixels and sensors, while the peripheral region handles the complexity of line routing and shielding, thereby managing overall layout complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the integration of fingerprint sensing capabilities while maintaining display performance by optimizing the layout and reducing signal interference, thereby improving user input recognition.
Implementation Method 1
a conductive layer disposed in the peripheral region and disposed between one or more of the plurality of data lines and one or more of the plurality of readout lines
Data Source
AI summary
A display panel includes a peripheral region adjacent to an active region. The display panel further includes a plurality of pixels disposed in the active region, a plurality of data lines electrically connected with the plurality of pixels and that extend to the peripheral region, a plurality of sensors disposed in the active region, and a plurality of readout lines electrically connected with the plurality of sensors and that extend from the active region to the peripheral region. In addition, a conductive layer is disposed in the peripheral region and between at least some of the plurality of data lines and at least some of the plurality of readout lines.