LED Display Pixel Layout With Selective Redundancy Compensation
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Solution Overview
Problem
Existing display apparatuses with light emitting diodes (LEDs) face issues of redundancy, leading to increased manufacturing costs due to the need for additional LEDs to compensate for defects, which affects efficiency and luminance.
Innovation Solution
A display apparatus design that includes a substrate with a pixel driving circuit, insulating layers, and optical layers made of different materials, where the first optical layer surrounds the main LED, reducing redundancy by using redundancy LEDs only in defective columns and optimizing the layout of subpixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If redundancy light emitting diodes are added to compensate for defects, then reliability is improved, but manufacturing cost increases
Solution Approach 1:
The patent implements different structural configurations for different subpixel columns: first subpixel columns include both main and redundancy light emitting diodes, while second subpixel columns include only main light emitting diodes. This local differentiation allows reliability enhancement where needed while reducing manufacturing costs in columns where redundancy is less critical.
2Reliability
If redundancy light emitting diodes are added to compensate for defects, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements different structural configurations for different subpixel columns: first subpixel columns include both main and redundancy light emitting diodes, while second subpixel columns include only main light emitting diodes. This local differentiation allows reliability enhancement where needed while reducing manufacturing costs in columns where redundancy is less critical.
Solution Approach 2:
The patent uses a common electrode structure that serves multiple functions: it acts as the cathode for light emitting diodes, provides electrical connection to pixel driving circuits, and serves as a reference potential across different subpixel types. This multi-functionality reduces the need for separate components and simplifies the overall device structure.
3Reliability
If redundancy light emitting diodes are added to compensate for defects, then reliability is improved, but luminance efficiency decreases
Solution Approach 1:
The patent implements different structural configurations for different subpixel columns: first subpixel columns include both main and redundancy light emitting diodes, while second subpixel columns include only main light emitting diodes. This local differentiation allows reliability enhancement where needed while reducing manufacturing costs in columns where redundancy is less critical.
Solution Approach 2:
The patent provides redundancy light emitting diodes only in first subpixel columns, which correspond to subpixels that are more critical for display quality or more prone to defects. This partial redundancy approach ensures adequate defect compensation while avoiding the luminance efficiency loss that would result from adding redundancy to all subpixels.
Data Source
AI summary
A display apparatus is provided, which comprises a substrate including a display area and a non-display area, a pixel driving circuit arranged in the display area of the substrate, an insulating layer on the pixel driving circuit, a bank on the insulating layer, a main light emitting diode provided on the bank while overlapping the bank, and a first optical layer arranged on a side of the main light emitting diode, wherein an entire area of the first optical layer on a plane overlaps the main light emitting diode.