Micro-Pixel Controller Display Module for Narrow Pitch Micro-LEDs
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Solution Overview
Problem
Existing display technologies, such as LCDs, face challenges in achieving a thin and simple structure with high contrast, brightness, and wide viewing angles, due to the need for complex components like backlight units, liquid crystal layers, and color filters.
Innovation Solution
A display module is developed that uses a substrate with a thin film transistor circuit and inorganic light emitting diodes (LEDs) mounted on its upper surface, which is then mounted on a module substrate, allowing for a narrow pitch interval and wide viewing angle, while facilitating circuit inspection and replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If LCD technology is used with backlight unit, liquid crystal layer, and color filter, then display function is achieved, but structure becomes complex and thickness increases
Solution Approach 1:
The patent extracts and removes the backlight unit, liquid crystal layer, and color filter from the display structure, retaining only the essential light-emitting components (OLEDs or micro-LEDs) and their supporting substrates. This extraction eliminates unnecessary components that contribute to complexity and thickness while preserving the core light emission and display functions.
Solution Approach 2:
The display is segmented into separate functional layers: a first substrate providing mechanical support, light-emitting elements (OLEDs or micro-LEDs) for light generation, and a second substrate for additional support and protection. This segmentation allows each layer to be optimized independently and facilitates assembly while reducing overall structural complexity.
2Illumination intensity
If micro-LEDs are used instead of OLEDs, then brightness and light emission efficiency are improved, but manufacturing complexity increases
Solution Approach 1:
The patent introduces a transfer substrate as an intermediary component in the manufacturing process. Micro-LEDs are first fabricated on this temporary substrate using established semiconductor manufacturing techniques, then transferred to the final display substrate. This intermediary approach enables the use of high-performance micro-LEDs while maintaining manufacturing feasibility through standardized processes.
3Manufacturing precision
If narrow pitch interval is achieved, then resolution is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent performs preliminary arrangement and positioning of light-emitting elements on the first substrate before final assembly. This preliminary action ensures that elements are pre-positioned with the required narrow pitch intervals, reducing the precision demands on subsequent assembly steps and maintaining manufacturing efficiency while achieving high resolution.
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 solution enables the display module to achieve a narrow pitch interval and wide viewing angle, simplifying the manufacturing process and facilitating circuit inspection and replacement, thereby overcoming the structural and performance limitations of traditional display technologies.
Implementation Method 1
a plurality of pixels including a plurality of inorganic light emitting diodes (LEDs) provided on an upper surface of the second substrate
Implementation Method 2
at least one thin film transistor (TFT) provided on the second substrate and electrically connected to the upper connection pad through a blind via
Data Source
AI summary
A display module and a display apparatus including the same are provided. The display module includes a first substrate; a plurality of micro-pixel controllers provided on an upper surface of the first substrate and including a second substrate; a plurality of pixels including a plurality of inorganic light emitting diodes (LEDs) provided on an upper surface of the second substrate; and a driver integrated chip (IC) configured to transmit a driving signal to the plurality of micro-pixel controllers, wherein each pixel of the plurality of pixels includes at least two inorganic LEDs among the plurality of inorganic LEDs, and wherein each micro-pixel controller of the plurality of micro-pixel controllers is electrically connected to inorganic LEDs of at least two pixels.