LED Display Layout With Shielding Layer for Narrow Bezel Panels
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Solution Overview
Problem
Existing display devices face challenges in narrowing the frame while maintaining a region for the drive circuit, leading to increased costs and decreased yield due to complex mounting processes.
Innovation Solution
A display device configuration that includes a display portion with first and second LEDs, a pixel circuit portion with thin film transistors, a drive circuit portion, and a shielding layer between the display and drive circuit portions, allowing the LEDs to overlap the drive circuit while maintaining a narrow frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the frame is narrowed to increase display surface area, then the display portion area increases, but the drive circuit portion has insufficient space and requires complex mounting processes
Solution Approach 1:
The patent applies dimensionality change by allowing the display portion to overlap vertically with the drive circuit portion in the thickness direction. This enables the display area to extend over the drive circuit region, effectively increasing the display surface area without requiring additional lateral space, thus narrowing the frame while avoiding complex mounting processes.
Solution Approach 2:
The patent implements nesting by placing the display portion over the drive circuit portion in a layered configuration. The display portion is positioned in an upper layer while the drive circuit portion is in a lower layer, allowing both components to occupy the same lateral footprint space. This nested arrangement maximizes space utilization and simplifies the overall device structure.
2Area of stationary object
If the LED overlaps the drive circuit portion to narrow the frame, then the display surface area increases, but noise from the drive circuit may interfere with the LED operation
Solution Approach 1:
The patent introduces a shielding layer as an intermediary component positioned between the display portion and the drive circuit portion. This shielding layer acts as a mediator that blocks or attenuates electromagnetic noise and other harmful factors generated by the drive circuit, preventing interference with the LED operation while allowing the display portion to overlap with the drive circuit portion for frame narrowing.
Solution Approach 2:
The patent extracts the shielding function from the overall structure by adding a dedicated shielding layer that is electrically connected to a fixed potential. This separate shielding component specifically addresses the noise interference problem without affecting the overlapping arrangement of the display and drive circuit portions, allowing the frame to be narrowed while protecting against harmful factors.
3Reliability
If a shielding layer is added between the display and drive circuit portions, then noise interference is reduced, but the device structure becomes more complex
Solution Approach 1:
The shielding layer is designed to serve multiple functions: it provides electromagnetic shielding to block noise from the drive circuit, acts as an electrical connection to fixed potential for stable operation, and can be integrated into the existing layered structure of the display device. By combining these functions into a single component, the patent reduces noise interference while minimizing the increase in structural complexity.
Data Source
AI summary
A display device includes a display portion mounted with a first LED and a second LED are mounted, a pixel circuit portion provided with a first pixel-circuit thin film transistor electrically connected to the first LED and a second pixel-circuit thin film transistor electrically connected to the second LED, a drive circuit portion provided with a drive-circuit thin film transistor, and a shielding layer provided between the display portion and the drive circuit portion. A fixed potential is applied to the shielding layer. The second LED overlaps the drive circuit portion with the shielding layer therebetween.