Display Panel Sub-Pixel Sharing for Higher Micro LED Transfer Yield
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Solution Overview
Problem
The challenge in display technologies is improving the yield of the mass transfer process for Micro LED and Mini LED display panels, where high precision is required due to the small size of LEDs, leading to lower transfer yields and limited room for further enhancement in mature transfer technologies.
Innovation Solution
A display panel design where sub-pixels of different colors share one light-emitting element, with a light-limiting structure that controls the light exit position, allowing for sequential enabling of sub-pixels to mix colors and reduce the complexity of alignment and picking during the transfer process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the LED size is reduced for miniaturization, then the pixel density is improved, but the manufacturing precision and transfer yield deteriorate
Solution Approach 1:
The invention divides the light-emitting element into multiple sub-pixels (red, green, blue sub-pixels) that share a single light-emitting element. This segmentation allows the light-emitting element itself to be larger while still achieving high pixel density through the sub-pixel division, thereby improving transfer yield while maintaining high pixel density.
Solution Approach 2:
Multiple sub-pixels of different colors share a single light-emitting element, merging the function of multiple small LEDs into one larger element. This reduces the total number of light-emitting elements required, simplifying the transfer process and improving manufacturing precision and yield.
2Area of moving object
If the number of light-emitting elements is increased to achieve high pixel density, then the display quality is improved, but the device complexity and transfer process difficulty increase
Solution Approach 1:
Multiple sub-pixels share a single light-emitting element, reducing the total number of LEDs required. This merging approach decreases device complexity and simplifies the transfer process while maintaining high pixel density through the sub-pixel structure.
Solution Approach 2:
A single light-emitting element serves multiple functions by providing light to multiple sub-pixels of different colors. This multi-functionality reduces the overall number of components needed and simplifies the transfer process.
3Manufacturing precision
If the alignment precision is increased for better transfer yield, then the transfer accuracy is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
By segmenting the light-emitting element into multiple sub-pixels, the invention allows the use of larger light-emitting elements that are easier to align and transfer with standard equipment, reducing manufacturing complexity while maintaining high transfer accuracy.
Solution Approach 2:
The invention changes the structural parameters by using larger light-emitting elements with internal sub-pixel structures, making them more tolerant to alignment variations and reducing the need for ultra-precise alignment equipment.
Data Source
AI summary
A display panel and a display apparatus are described. In an embodiment, the display panel includes a substrate and a sub-pixel group located at a side of the substrate. In an embodiment, the sub-pixel group includes sub-pixels of at least two different colors and a light-limiting structure. In an embodiment, the sub-pixels share one light-emitting element. In an embodiment, along a direction perpendicular to the substrate, the light-limiting structure overlaps with the light-emitting element and is located at a light exit side of the light-emitting element. In an embodiment, when the display panel displays an image, the sub-pixels in the sub-pixel group are enabled in sequence. In an embodiment, the when one of the sub-pixels is enabled, the light-limiting structure causes light emitted by the light-emitting element to exit only from the enabled sub-pixel.