Display Device Shielding Electrode Wiring Circuit Integration
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Solution Overview
Problem
Current display devices face challenges in integrating biometric information recognition functions efficiently, leading to increased non-display area and reduced circuit integration density.
Innovation Solution
A display device design featuring a base layer with defined display and non-display areas, including a circuit layer with pixel driving and sensor driving circuits, and a shielding electrode wiring that overlaps with other lines to optimize space usage and improve circuit integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If biometric information recognition function is integrated into display device, then device functionality is improved, but non-display area increases and circuit integration density decreases
Solution Approach 1:
The patent combines the biometric recognition circuit with the display pixel circuit into a single integrated structure. The sensor driving circuit is merged with the pixel driving circuit, allowing both display and biometric recognition functions to share the same circuit resources and occupy the same physical space, thereby eliminating the need for separate non-display area for biometric circuits.
Solution Approach 2:
The circuit layer is designed to perform multiple functions: it serves both as the pixel driving circuit for display operations and as the sensor driving circuit for biometric recognition. This multi-functional design allows the same circuit structure to support both display functionality and biometric sensing, improving versatility without increasing area.
2Adaptability or versatility
If biometric information recognition function is integrated into display device, then device functionality is improved, but circuit integration density decreases
Solution Approach 1:
The patent merges the sensor driving circuit with the pixel driving circuit into a unified structure. Both circuits share common components including the same transistor network, capacitors, and interconnect lines, thereby reducing overall circuit complexity while maintaining both display and biometric recognition functionalities.
Solution Approach 2:
The integrated circuit is designed to perform dual functions: driving display pixels and driving biometric sensors. By using the same circuit elements for both purposes, the patent achieves high circuit integration density while supporting multiple functions, thereby improving device functionality without increasing complexity.
3Reliability
If shielding electrode wiring is added to reduce noise, then signal quality is improved, but device complexity increases
Solution Approach 1:
The shielding electrode wiring is integrated into the existing circuit layer structure, sharing the same manufacturing layers and processes as the functional circuit elements. The shielding electrodes are formed using the same conductive material and deposition techniques as the circuit interconnects, thereby reducing device complexity while providing noise protection.
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
The solution enhances circuit integration density and reduces the non-display area, enabling more efficient biometric information recognition and improved user interaction.
Implementation Method 1
an element layer on the circuit layer and including a light emitting element and a light receiving element arranged to correspond to the display area
Implementation Method 2
a shielding electrode wiring electrically connected to the driving voltage line and overlapping the reset voltage line
Data Source
AI summary
A display device includes: a base layer in which a display area and a non-display area are defined; a circuit layer on the base layer; and an element layer on the circuit layer and including a light emitting element and a light receiving element corresponding to the display area, wherein the circuit layer includes: a pixel driving circuit connected to the light emitting element; a sensor driving circuit connected to the light receiving element; a read-out line connected to the sensor driving circuit; a data line connected to the pixel driving circuit; a driving voltage line connected to the pixel driving circuit; a reset voltage line connected to the sensor driving circuit; and a shielding electrode wiring electrically connected to the driving voltage line and overlapping the reset voltage line.