Pixel with Two Contact Points for Micro LED Displays
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Solution Overview
Problem
Conventional pixels require four contacting points for operation, which limits transfer efficiency and increases the size of the pixel driving circuit, making it unsuitable for smaller display applications, especially with the growing interest in micro LEDs.
Innovation Solution
A pixel design with only two contacting points, where the positive power terminal is connected to the data driving circuit and the negative power terminal is connected to the scan driving circuit, incorporating a pixel memory unit, reference voltage supply unit, and a comparator to manage signal transmission efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If four contacting points are used for pixel operation, then power supply and signal transmission are ensured, but transfer efficiency decreases and pixel size increases
Solution Approach 1:
The patent combines multiple functions into fewer contacting points. Specifically, the first contacting point serves as both a power supply terminal and a signal transmission path, while the second contacting point handles both scanning signals and data signals. This merging reduces the total number of contacting points from four to two, thereby improving transfer efficiency and reducing pixel size without compromising functional requirements
2Adaptability or versatility
If four contacting points are used for pixel operation, then all necessary signals can be transmitted, but pixel size increases making it unsuitable for micro LED applications
Solution Approach 1:
The patent merges the functions of power supply and signal transmission into two contacting points, significantly reducing the pixel area. This size reduction makes the pixel structure suitable for micro LED applications where small pixel dimensions are critical
Solution Approach 2:
Each contacting point is designed to perform multiple functions simultaneously. The first contacting point provides both power supply and data transmission, while the second contacting point handles both scanning signals and grounding. This multi-functionality allows the pixel to maintain all necessary operations with fewer contacting points, enabling compact design for micro LED displays
3Ease of manufacture
If only two contacting points are used, then transfer efficiency and manufacturing yield improve, but signal transmission complexity increases
Solution Approach 1:
By merging power supply and signal transmission into the same contacting points, the patent simplifies the manufacturing process and improves yield. The reduced number of contacting points fewer alignment errors and manufacturing defects during fabrication
4Area of stationary object
If only two contacting points are used, then pixel size is reduced for compact displays, but signal-to-noise ratio may deteriorate with small voltage signals
Solution Approach 1:
The patent introduces a level shifting circuit as an intermediary component within the pixel. This circuit converts small voltage signals received through the two contacting points into larger voltage levels, thereby maintaining signal-to-noise ratio and detection accuracy despite the reduced number of contacting points and smaller pixel size
Data Source
AI summary
Provided are a pixel having two contacting points and an operating method of the pixel. The pixel includes a positive power terminal and a negative power terminal which are related to power required for driving of a pixel driving circuit unit driving a plurality of light-emitting elements, wherein the positive power terminal is connected to a data driving circuit, and the negative power terminal is connected to a scan driving circuit. The pixel may be driven according to a potential difference between a signal output from the data driving circuit and a signal output from the scan driving circuit.