LED Display Panel Redundancy Driving Circuit Repair
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Solution Overview
Problem
Existing LED display panels face challenges in repairing damaged components, particularly due to electrostatic discharge (ESD) during manufacturing, which can result in poor image quality and require complex repair processes.
Innovation Solution
The implementation of a display panel structure with redundancy driving circuits connected in parallel to the main driving circuits, allowing for easy switching to redundant circuits in case of abnormalities, and an insulated welding connection to prevent unnecessary operation of redundant components until needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If driving circuits are integrated on the glass substrate without redundancy, then device complexity is reduced, but reliability deteriorates when ESD damage occurs
Solution Approach 1:
The patent applies preliminary action by pre-configuring redundancy driving circuits in parallel with the main driving circuits before any damage occurs. These redundant circuits remain in standby mode during normal operation but are ready to immediately take over if ESD or other damage affects the main driving circuits, thus ensuring continuous reliable operation without requiring complex repair processes after damage occurs.
Solution Approach 2:
The patent implements beforehand cushioning by creating a protective redundancy system where backup driving circuits are prepared in advance to cushion against the harmful effects of ESD damage. This cushioning mechanism allows the display panel to withstand electrostatic discharge events without complete failure, as the redundant circuits can compensate for damaged components.
2Reliability
If redundancy driving circuits are added in parallel, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies the taking out principle by extracting the repair complexity from the operational phase and concentrating it in the manufacturing phase. The insulated welding structure allows redundant circuits to be pre-connected during manufacturing, and repair simply involves switching signals rather than physically repairing complex circuit connections, thus reducing operational complexity while maintaining reliability.
Solution Approach 2:
The patent uses copying by creating identical copies of the driving circuit functionality in the redundancy driving circuits. These copied circuits mirror the main driving circuits' structure and function, allowing them to perfectly substitute for damaged original circuits. This copying approach ensures reliability through functional equivalence while maintaining manageable complexity through standardized circuit designs.
3Ease of repair
If insulated welding form is used for redundancy circuits, then ease of repair is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies preliminary action by pre-establishing the insulated welding connections between main and redundancy driving circuits during the manufacturing process. This preliminary configuration of welding patterns and insulated structures ensures that when repair is needed, no complex physical connections need to be made - only signal switching is required, dramatically simplifying the repair process while the manufacturing precision requirements are confined to the initial manufacturing stage.
Data Source
AI summary
A display panel is provided. The display panel may include a glass, a driver formed on a first surface of the glass, and a circuit layer formed on a second surface of the glass. The circuit layer may include a plurality of pixel circuits configured to drive a plurality of micro light emitting diodes (LEDs) forming a plurality of pixels of the display panel; a plurality of driving circuits which are respectively connected to the driver via wiring formed over at least one side surface of the glass, and configured to supply driving signals to the plurality of pixel circuits based on signals received from the driver; and a plurality of redundancy driving circuits connected to the plurality of respective driving circuits in parallel, the plurality of redundancy driving circuits having a same circuit structure as the plurality of respective driving circuits.