Biometric Display Circuit Layout with Localized Shielding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face challenges in reducing the size of the non-display area while maintaining biometric information recognition functionality.
Innovation Solution
The display device incorporates a circuit layer with pixel and sensor driving circuits, data lines, and a shielding pattern that overlaps gate wirings and connecting lines, optimizing the layout to minimize the non-display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the non-display area is reduced to increase display area, then the display area increases, but the circuit layout becomes more complex and harder to manage
Solution Approach 1:
The patent divides the circuit layer into multiple segments with different functions: pixel driving circuits, sensor driving circuits, data lines, gate wirings, and shielding patterns. Each segment is independently designed and positioned to optimize its specific function while reducing overall complexity in the reduced non-display area
Solution Approach 2:
The patent utilizes the vertical dimension by stacking circuit elements in multiple layers. The shielding pattern is positioned between gate wirings and connecting lines in the vertical direction, creating a three-dimensional circuit layout that reduces horizontal space requirements and manages complexity in the constrained non-display area
2Area of moving object
If the non-display area is reduced, then the display area increases, but signal interference between circuit elements increases
Solution Approach 1:
The patent introduces a shielding pattern as an intermediary element positioned between gate wirings and connecting lines. This shielding pattern acts as a mediator that blocks electromagnetic interference between the two circuit elements, allowing them to be placed closer together in the reduced non-display area without signal interference
Solution Approach 2:
The shielding pattern is strategically positioned only in specific locations where interference occurs between gate wirings and connecting lines, rather than applying shielding throughout the entire circuit. This localized approach reduces interference where needed while minimizing the impact on the already-constrained non-display area
3Area of moving object
If the non-display area is reduced, then the display area increases, but the placement of sensor circuits and connecting lines becomes more difficult
Solution Approach 1:
The patent segments the circuit layer into distinct functional regions: pixel driving circuits, sensor driving circuits, data lines, and shielding patterns. Each segment has a defined position and function, making the placement process more systematic and easier to manufacture despite the reduced non-display area
Solution Approach 2:
The circuit layer is designed with multi-functional elements that serve multiple purposes. For example, the shielding pattern not only blocks interference but also defines spatial relationships between circuit elements. The gate wirings and connecting lines are arranged to simultaneously achieve signal transmission and interference reduction, simplifying the overall placement process
Data Source
AI summary
A display device includes a base layer, a circuit layer on the base layer, and an element layer on the circuit layer and including light emitting elements and light receiving elements. The circuit layer includes pixel driving circuits connected to the light emitting elements, sensor driving circuits connected to the light receiving elements, gate wirings connected to the pixel driving circuits, first readout lines connected to a first group of sensor driving circuits among the sensor driving circuits, second readout lines connected to a second group of sensor driving circuits among the sensor driving circuits, connecting lines electrically connected with the second readout lines, respectively, in the display area, and a shielding pattern between the gate wirings and the connecting lines.