Shielding Electrode Line for LED Alignment in Display Devices
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Solution Overview
Problem
Ultra-small light emitting diodes (LEDs) with nano unit size face misalignment issues due to vertical electric field effects caused by other elements when aligned between electrodes in display devices.
Innovation Solution
Incorporating a shielding electrode line between the power line part and the first electrode, which extends to cover regions between adjacent pixels, to prevent the vertical electric field effect and ensure proper alignment of LEDs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If ultra-small LEDs are disposed on the electrodes, then the light conversion efficiency and power consumption are improved, but misalignment occurs due to field effect caused by other elements
Solution Approach 1:
A shielding electrode line is introduced as an intermediary element between the power line part and the first electrode. This shielding electrode line receives the first driving power source and blocks the vertical electric field effect caused by the driving circuit, thereby preventing misalignment of the ultra-small LEDs while maintaining the power consumption benefits
Solution Approach 2:
The harmful vertical electric field effect is extracted and isolated from the LED alignment region by introducing the shielding electrode line. The shielding electrode line specifically targets and blocks the electric field interference from the driving circuit, separating the power supply function from the alignment-sensitive region
2Manufacturing precision
If a shielding electrode line is added to prevent misalignment, then the alignment precision is improved, but the device complexity increases
Solution Approach 1:
The shielding electrode line is designed to serve multiple functions: it provides shielding against vertical electric field effects to prevent misalignment, while also receiving the first driving power source for the light emitting devices. This multi-functionality reduces the need for separate components and minimizes structural complexity
Solution Approach 2:
The shielding function and power supply function are merged into a single component - the shielding electrode line. By combining these two functions, the patent reduces the number of separate elements needed, thereby limiting the increase in device complexity while achieving both shielding and power supply objectives
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
The shielding electrode line effectively prevents misalignment of ultra-small LEDs by blocking the electric field effect, ensuring accurate alignment and reducing stress on the display device, thereby improving the alignment and efficiency of light emission.
Implementation Method 1
a shielding electrode line between the power line part and the first electrode, the shielding electrode line to receive the first driving power source... to prevent a vertical electric field effect caused by a driving circuit under the electrode part
Data Source
AI summary
A display device includes a substrate including a plurality of pixels; an electrode part including a first electrode in each pixel of the plurality of pixels on the substrate and a second electrode spaced apart from the first electrode on a same plane; a plurality of light emitting devices spaced apart from each other between the first electrode and the second electrode; a power line part including a first power line between the substrate and the first electrode, the first power line to receive a first driving power source, and a second power line between the substrate and the second electrode, the second power line to receive a second driving power source; and a shielding electrode line between the power line part and the first electrode, the shielding electrode line to receive the first driving power source.