Display Pixel Repair Patterns for Misaligned Light Emitting Elements
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Solution Overview
Problem
Display devices face challenges in maintaining display quality due to defective pixels where light emitting elements are misaligned, leading to dark spots and reduced image clarity.
Innovation Solution
A display device design that includes a substrate with a display area and non-display area, featuring a first pixel with specific electrode and light emitting element configurations, and a method to repair defective pixels by altering the current direction through the use of repair patterns and contact electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light emitting elements are misaligned in defective pixels, then manufacturing defects occur, but display quality deteriorates with dark spots and reduced image clarity
Solution Approach 1:
The patent recovers defective pixels by identifying misaligned light emitting elements and reconfiguring their electrical connections through repair patterns. Instead of discarding the entire display panel due to manufacturing defects, the invention selectively redirects current through alternative contact electrodes to activate misaligned elements in the correct orientation, thereby recovering display functionality and eliminating dark spots.
Solution Approach 2:
The invention changes the electrical connection parameters of misaligned light emitting elements by introducing repair patterns that alter current direction. By switching which contact electrodes receive driving signals, the system changes the operational state of defective pixels from non-functional to functional, effectively correcting alignment issues through electrical reconfiguration rather than physical realignment.
2Reliability
If repair patterns are added to correct misaligned light emitting elements, then display quality improves, but device complexity increases
Solution Approach 1:
The patent segments the pixel structure into multiple functional components: normal contact electrodes, repair contact electrodes, and repair patterns. This segmentation allows independent control and configuration of defective pixels without affecting the entire display system. The repair patterns are isolated specific electrode connections that can be activated only when needed, maintaining simplicity in the overall device while providing complex repair capability where required.
Solution Approach 2:
The invention introduces repair contact electrodes as intermediary elements between the driving circuit and misaligned light emitting elements. These intermediary electrodes serve as additional connection points that enable alternative current paths without disrupting the existing pixel structure. The repair patterns act as mediators that bridge the gap between standard electrode configurations and the corrected alignment state, adding minimal complexity while achieving the repair function.
Data Source
AI summary
A display device includes a first pixel disposed in a display area, wherein the first pixel includes first and second electrodes disposed in the display area and spaced apart from each other; a first light emitting element group including light emitting elements disposed between the first electrode and the second electrode; a first contact electrode disposed on the first electrode and connected to the light emitting elements; a second contact electrode disposed on the second electrode and connected to the light emitting elements; a first electrode contact portion disposed on the first electrode and connected to the first electrode; a second electrode contact portion disposed on the second electrode and connected to the second electrode; a first repair pattern connecting the second contact electrode and the first electrode contact portion; and a second repair pattern connecting the first contact electrode and the second electrode contact portion.