Shared Redundancy Sub-Pixel Layout for Micro-LED Displays
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Solution Overview
Problem
Existing display devices face challenges in simplifying pixel circuit structures, reducing power consumption, and minimizing redundancy sub pixels to lower manufacturing costs.
Innovation Solution
A display device design that integrates multiple pixel circuits into a single micro-driver, utilizes redundancy sub pixels shared by adjacent pixels, and incorporates redundancy micro-LEDs to compensate for defective main sub pixels, thereby reducing the number of redundancy sub pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each pixel includes dedicated redundancy sub pixels, then display reliability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges redundancy sub pixels from multiple adjacent pixels into a shared resource. Specifically, one redundancy sub pixel is shared between two adjacent pixels (e.g., first pixel and second pixel), allowing a single redundancy element to serve multiple pixels instead of each pixel having its own dedicated redundancy sub pixel. This reduces overall device complexity while maintaining reliability through shared backup capability.
Solution Approach 2:
The redundancy sub pixel is designed with universal functionality to compensate for defects in multiple different pixels. The same redundancy sub pixel can be activated to replace defective sub pixels in either the first pixel or the second pixel, making it a multi-functional element that serves multiple purposes across different pixel units.
2Reliability
If each pixel includes dedicated redundancy sub pixels, then display reliability is improved, but manufacturing cost increases
Solution Approach 1:
By combining shared redundancy sub pixels for multiple adjacent pixels, the total number of redundancy elements required is reduced. Instead of allocating separate redundancy sub pixels to each pixel, the patent implements a sharing scheme where one redundancy sub pixel serves two pixels, directly reducing manufacturing material costs and complexity.
3Use of energy by moving object
If multiple pixel circuits are integrated into a single micro-driver, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The patent integrates multiple pixel circuits into a single micro-driver unit, combining the driving functions for multiple pixels (e.g., first pixel and second pixel) into one consolidated circuit. This merging of pixel circuits reduces the total number of separate driving circuits required, thereby reducing overall power consumption while managing complexity through functional integration.
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 structure, reduces power consumption, and lowers manufacturing costs while ensuring high-quality display performance by utilizing shared redundancy sub pixels to compensate for defects.
Implementation Method 1
each of the plurality of main sub pixels comprises a main micro-LED; and a plurality of redundancy sub pixels defined on the substrate and disposed between a pair of pixels adjacent to each other among the plurality of pixels, wherein each of the plurality of redundancy sub pixels comprises a redundancy micro-LED
Data Source
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AI summary
A display device according to one embodiment of the present disclosure may include: a substrate on which a plurality of pixels including a plurality of main sub pixels are defined; a plurality of redundancy sub pixels disposed between the plurality of main sub pixels; one or more pixel drive circuits disposed on the substrate; a plurality of main micro-LEDs disposed in the plurality of main sub pixels and electrically connected to the pixel drive circuit; and a plurality of redundancy micro-LEDs disposed in the plurality of redundancy sub pixels and electrically connected to the pixel drive circuit, in which a pair of pixels, among the plurality of pixels, share the plurality of redundancy sub pixels. Therefore, the plurality of pixels use and share the plurality of redundancy sub pixels, such that the number of redundancy sub pixels may be reduced, and manufacturing costs may be reduced.