Micro LED Display Module Layout for Circuit Testing and Replacement
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Solution Overview
Problem
Existing display technologies, such as LCDs, have complex structures and limitations in achieving thin thickness, high contrast ratio, and energy efficiency, while self-emissive displays like micro LEDs offer improved brightness and durability but face challenges in circuit testing and replacement.
Innovation Solution
A display module with a thin film transistor circuit for driving inorganic light-emitting devices on a panel substrate, utilizing micro pixel controllers and LTPS thin film transistors, allows for circuit testing and replacement, and includes a frame supporting display modules with driver integrated chips for efficient signal transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inorganic light-emitting devices are mounted directly on the panel substrate, then brightness and durability are improved, but circuit testing and replacement become difficult
Solution Approach 1:
The patent divides the display system into separate functional modules: the panel substrate with inorganic light-emitting devices, the TFT circuit substrate with driving circuits, and the micro pixel controller substrate. This segmentation allows independent testing and replacement of each module, solving the problem of difficult circuit replacement while maintaining the durability benefits of inorganic light-emitting devices.
Solution Approach 2:
The patent extracts the TFT circuit and micro pixel controller from the panel substrate, placing them on separate substrates. This extraction enables the circuit components to be tested and replaced independently without affecting the inorganic light-emitting devices, thus improving ease of repair while preserving reliability.
2Ease of repair
If a separate chip is used for TFT circuit, then circuit testing and replacement become easier, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into integrated substrates: the TFT circuit substrate integrates both the thin-film transistor circuits and the micro pixel controllers, and the micro pixel controller substrate integrates control logic for multiple pixels. This merging reduces the overall number of separate components while maintaining ease of testing and replacement, thus managing device complexity.
3Reliability
If micro LED display is used, then contrast ratio and response time are improved, but manufacturing complexity increases
Solution Approach 1:
The patent segments the manufacturing process into distinct stages: fabricating inorganic light-emitting devices on one substrate, fabricating TFT circuits on another substrate, and then assembling them together. This segmentation allows each component to be manufactured using optimized processes independently, reducing overall manufacturing complexity while maintaining the superior contrast ratio of micro LED displays.
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
Facilitates circuit testing and replacement, enabling high-resolution, flexible, and thin display devices with improved brightness and durability, suitable for large-scale screens and various applications.
Implementation Method 1
a plurality of inorganic light-emitting devices disposed on an upper surface of the first substrate
Implementation Method 2
at least one thin film transistor disposed on the second substrate, wherein the at least one thin film transistor switches a plurality of inorganic light-emitting devices
Data Source
AI summary
A display module including a plurality of pixels, according to an embodiment, may include: a first substrate: a plurality of inorganic light-emitting elements disposed on the upper surface of the first substrate; a plurality of micro pixel controllers disposed on the lower surface of the first substrate; and a driver IC which transmits driving signals to the plurality of micro pixel controllers, wherein each of the plurality of pixels includes two or more inorganic light-emitting elements among the plurality of inorganic light-emitting elements, and each of the plurality of micro pixel controllers controls two or more pixels among the plurality of pixels.