Shared Sub-Pixel Layout for Micro LED Dead Pixel Compensation
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Solution Overview
Problem
In micro LED display panels, dead pixels due to transplantation yield issues lead to abnormal display areas and a significant impact on overall display effect, as spare light-emitting diodes re-bound in adjacent areas can cause light-emitting center shifts, affecting brightness and display quality.
Innovation Solution
The display panel design includes shared sub-pixel areas with multiple spare binding areas, where spare light-emitting diodes are bound to compensate for non-functional display light-emitting diodes, allowing adjustment of the equivalent light-emitting center to minimize center shifts and optimize brightness distribution, thereby reducing abnormal display areas and enhancing overall display effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spare light-emitting diode is re-bonded in the spare binding area next to the transplanted light-emitting diode, then the luminous brightness of the failed light-emitting diode is compensated, but a large abnormal display area appears and the overall display effect is significantly impacted
Solution Approach 1:
The patent combines multiple spare binding areas into a shared spare binding region that serves multiple pixel areas. Instead of having separate spare binding areas for each pixel, the invention merges them into a common pool that can be dynamically allocated to compensate for failed light-emitting diodes across different pixels, thereby reducing the overall abnormal display area while maintaining brightness compensation capability.
Solution Approach 2:
The patent transitions from a one-to-one correspondence between spare binding areas and pixel areas to a many-to-many sharing relationship. By introducing the dimension of sharing and pooling, multiple pixel areas can access the same spare binding resources, which fundamentally changes the spatial organization and reduces the total area dedicated to spare bindings, thereby minimizing abnormal display areas.
2Object-affected harmful factors
If multiple spare binding areas are shared among pixel areas, then the abnormal display area is reduced, but the complexity of managing and allocating spare light-emitting diodes increases
Solution Approach 1:
The shared spare binding areas are designed to serve multiple functions and multiple pixel areas simultaneously. The same spare binding region can be allocated to different pixel areas depending on where failures occur, making the spare binding system universal and multi-functional. This reduces the need for dedicated spare areas for each pixel while maintaining comprehensive coverage.
Solution Approach 2:
The system enables automatic detection and allocation of spare light-emitting diodes to failed pixels through integrated control circuits. When a light-emitting diode fails, the control system automatically identifies the failure, selects an appropriate spare from the shared pool, and performs re-bonding without requiring complex manual intervention, thereby managing the increased complexity through automation.
3Object-affected harmful factors
If spare light-emitting diodes are strategically positioned in shared sub-pixel areas, then the light-emitting center shift is minimized and display effect is optimized, but the manufacturing process becomes more complex
Solution Approach 1:
The patent implements different quality standards and configurations for different regions within the shared sub-pixel areas. Spare binding areas are strategically positioned and configured based on local requirements - some regions have higher density of spare bindings, others have different orientation arrangements. This local differentiation optimizes light-emitting center alignment while allowing standardized manufacturing processes to be applied uniformly across the panel.
Solution Approach 2:
The spare light-emitting diodes are pre-positioned and pre-configured in the shared sub-pixel areas during the manufacturing process, before any failures occur. This preliminary arrangement ensures that when failures happen, the spare diodes are already in optimal positions to minimize light-emitting center shifts, eliminating the need for complex post-failure positioning adjustments.
Data Source
AI summary
Provided are a display panel and a display device. The display panel includes a display area including pixel areas, each of which includes at least two sub-pixel areas each including a display light-emitting diode. The sub-pixel areas include shared sub-pixel areas, each of which is shared by at least two pixel areas and includes m spare binding areas, where m≥2. The shared sub-pixel areas include a first shared sub-pixel area, in which the display light-emitting diode does not emit light. Each first shared sub-pixel area includes n spare light-emitting diodes, where 2≤n≤m. When the display panel is driven to emit light, standard brightness required to be displayed by each first shared sub-pixel area is L1 and luminous brightness of each spare light-emitting diode in the first shared sub-pixel area is L2, where L2<L1. The present disclosure can weaken influence on display effect caused by shifting of the light-emitting center.