Micro LED Display Ground Circuit Board for Static Discharge
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Solution Overview
Problem
The assembly process of micro LED displays is hindered by the need to form wires on the side surfaces of the substrate while keeping them connected, leading to potential damage from static electricity, which can cause point/line/surface defects.
Innovation Solution
A ground connecting circuit is introduced, which includes a ground circuit board disposed on the periphery of the second circuit unit and electrically connected to the side circuit unit, effectively grounding static electricity generated in the circuit units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wires are formed on side surfaces of the substrate while keeping them connected, then the assembly process can proceed, but the substrate is exposed to potential damage from static electricity
Solution Approach 1:
A ground circuit board is introduced as an intermediary component between the substrate and the grounding system. This ground circuit board includes a ground pad that contacts the substrate's ground pad, and a ground wire that extends to the side surface to connect with the side circuit unit. This intermediary structure provides a dedicated static electricity discharge path without interfering with the normal wire formation process on the side surface.
Solution Approach 2:
The ground circuit board is prepared and positioned in advance before the substrate is fully assembled. The ground pad and ground wire are pre-configured to establish a static electricity discharge path early in the manufacturing process, ensuring protection is in place before static electricity damage can occur during subsequent assembly steps.
2Manufacturing precision
If connection pads and wires are exposed during the process of forming wires on side surfaces, then wire formation can be completed, but point/line/surface defects may occur due to static electricity
Solution Approach 1:
The ground circuit board serves as a mediator that provides a controlled path for static electricity discharge. The ground pad on the circuit board contacts the exposed connection pads and wires, while the ground wire conducts static electricity away from the vulnerable areas, preventing defects during the wire formation process.
Solution Approach 2:
Instead of trying to prevent static electricity generation, the invention converts the potentially harmful static electricity into a beneficial discharge path. The ground circuit board captures static electricity that would otherwise cause defects and safely conducts it to ground, turning a harmful factor into a controlled process element.
3Reliability
If all wires remain electrically connected during assembly, then electrical continuity is maintained, but disconnecting wires to final state causes damage from static electricity
Solution Approach 1:
The wiring system is segmented into functional groups: wires that remain permanently connected for electrical continuity, and the ground wire that is specifically separated to provide static electricity discharge. This segmentation allows the majority of wires to stay connected while a dedicated ground path is disconnected and routed separately to prevent static damage.
Solution Approach 2:
The ground circuit board acts as an intermediary that separates the electrical continuity function from the static electricity discharge function. It maintains connection pads and wires for normal electrical operation while providing a separate ground wire path that is disconnected from the main circuit to safely discharge static electricity without affecting operational wires.
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 ground connecting circuit protects the MUX/DEMUX circuit and driver IC from static electricity damage, ensuring the integrity of the micro LED display both during assembly and in the final product.
Implementation Method 1
a ground circuit board disposed on the second surface and configured to ground static electricity having been generated in one or more circuit units from among the first circuit unit, the second circuit unit, or the side circuit unit
Data Source
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AI summary
Disclosed are an antistatic ground circuit board and a micro LED display including same. The disclosed display comprises: a substrate comprising a first surface disposed to be oriented toward a first direction, a second surface disposed to be oriented toward a second direction opposite to the first direction, and a side surface disposed to be oriented toward a third direction perpendicular to the first and second directions; a first circuit unit disposed on the first surface; a second circuit unit disposed on the second surface; a side circuit unit disposed on the side surface and electrically connected to the first circuit unit; a plurality of micro LED chips arranged on one surface of the first circuit unit oriented toward the first direction; and a ground circuit board disposed on the second surface so as to ground static electricity generated in one or more circuit units from among the first circuit unit, the second circuit unit, and the side circuit unit, wherein the ground circuit board is electrically connected to the side circuit unit, is disposed around the second circuit unit, and may ground the generated static electricity. Various other embodiments are also possible.