Micro LED Pixel Circuit Layout for Defect Repair and Lower Power
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Solution Overview
Problem
Existing light emitting diode (LED) display apparatuses face issues with defective pixels due to micro LED device defects, leading to reliability concerns and increased power consumption.
Innovation Solution
The LED display apparatus incorporates a pixel design with a common connection pattern that overlaps with a driving power line, allowing for parallel and series connections among multiple LED devices, enabling repair of defective pixels through laser welding and reducing power consumption by sharing power lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple light emitting devices are connected in parallel with separate power lines, then each device can be independently controlled, but power consumption increases
Solution Approach 1:
Multiple light emitting portions share a common connection pattern that connects to a single driving power line. This merging of power supply paths reduces the total number of power lines required and decreases overall power consumption while maintaining independent control capability through selective activation.
Solution Approach 2:
The common connection pattern serves multiple functions: it provides electrical connection to multiple light emitting portions, enables selective activation of different portions, and allows repair operations by reconnecting to different power lines. This multi-functionality reduces system complexity and power consumption.
2Use of energy by stationary object
If a common connection pattern is used to connect multiple light emitting portions, then power consumption is reduced, but manufacturing precision is required to ensure proper overlap with driving power lines
Solution Approach 1:
The common connection pattern is pre-designed with predetermined overlap regions that align with driving power lines. This preliminary design ensures that proper alignment is achieved during manufacturing, reducing the precision requirements compared to ad-hoc alignment methods.
Solution Approach 2:
The common connection pattern acts as an intermediary element that bridges the light emitting portions and driving power lines. Its design with overlap regions provides a buffer zone that accommodates manufacturing variations, reducing the stringency of alignment precision requirements.
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
This design enhances pixel reliability and yield by facilitating repair of defective pixels and reduces power consumption through efficient power distribution among LED devices.
Implementation Method 1
facilitating repair of defective pixels through laser welding
Data Source
AI summary
The light emitting diode display apparatus comprises a pixel disposed on a substrate and configured to display an image. The pixel includes a first light emitting portion configured to connect with a first gate line disposed in a first direction, a data line disposed in a second direction which is perpendicular to the first direction, and a first driving power line which is parallel to the data line, a second light emitting portion configured to connect a second gate line which is parallel to the first gate line, the data line, and the first driving power line, a common connection pattern configured to connect with the first light emitting portion and the second light emitting portion in common, and a third light emitting portion configured to connect between the second driving power line and the common connection pattern. Some of the common connection pattern is configured to overlap with the second driving power line.