Semiconductor LED Sub-Pixel Layout for Easier Display Repair
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Solution Overview
Problem
Current display devices using semiconductor light emitting devices face challenges in flexibility and efficiency, particularly in replacing defective units without increasing complexity and cost, as existing repair methods are either costly or require high technical difficulty.
Innovation Solution
A display device configuration where multiple semiconductor light emitting devices share a semiconductor layer within a unit cell, allowing for easy replacement of defective units by inserting a new device into an empty space, and utilizing sub-electrodes to manage electrical connections without additional wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a replacement repair method is used to replace defective semiconductor light emitting devices, then the display reliability is improved, but the device complexity and manufacturing cost increase due to additional facility investment and separate chip design requirements
Solution Approach 1:
The patent merges the replacement chip design with the original chip design by integrating redundant sub-pixels into the same chip structure. Instead of requiring separate replacement chips, the original chip is designed with additional sub-pixels that can serve as replacements for defective ones, thereby reducing device complexity and eliminating the need for separate chip design while maintaining display reliability
Solution Approach 2:
The patent implements preliminary action by pre-configuring redundant sub-pixels within the chip design before any defects occur. These redundant sub-pixels are prepared in advance and can be activated through wiring modification when defects are detected, eliminating the need for complex replacement procedures and reducing repair process complexity
2Reliability
If a redundancy repair method is used with selective transfer of chips, then the display reliability is improved, but the manufacturing difficulty increases due to the complex process of selectively transferring chips greater than twice the number required
Solution Approach 1:
The patent combines multiple functions into a single chip by integrating redundant sub-pixels directly into the chip structure. This eliminates the need for selective chip transfer operations, as the replacement capability is built into the original chip, thereby significantly easing manufacturing processes while maintaining display reliability
Solution Approach 2:
The patent segments the chip into functional sub-pixels, where each sub-pixel can independently function or be replaced. By dividing the chip into modular sub-pixel units with built-in redundancy, the system achieves reliability without requiring complex selective chip transfer, as individual sub-pixels can be activated or deactivated through simple wiring modifications
3Ease of repair
If multiple semiconductor light emitting devices are disposed in one unit cell with shared semiconductor layer, then the ease of replacement is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent merges multiple semiconductor light emitting devices into a single integrated chip structure with a shared semiconductor layer. By combining multiple sub-pixels into one chip unit with unified manufacturing processes, the system achieves ease of replacement without significantly increasing manufacturing precision requirements, as the entire unit is manufactured and tested together as a single component
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 approach simplifies the replacement process, reduces complexity, and lowers costs by enabling convenient removal and replacement of defective semiconductor light emitting devices within the display device, enhancing the flexibility and reliability of the display.
Implementation Method 1
light emitting diodes (LEDs) are well known light emitting devices for converting an electrical current to light
Data Source
Figure 1
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Figure 3A~3B
AI summary
A display device including a substrate; a sub-pixel portion disposed on the substrate; and a wiring electrode electrically connected to the sub-pixel portion. Further, the sub-pixel portion includes a first light emitting portion and a second light emitting portion configured to output light of a same color and spaced apart with a groove therebetween, and the wiring electrode includes a base electrode configured to transmit a same electric signal to the first light emitting portion and the second light emitting portion, a first sub-electrode extended from the base electrode and electrically connected to the first light emitting portion, and a second sub-electrode extended from the base electrode and electrically connected to the second light emitting portion.