Micro LED Driving Backplane Wire Integration
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Solution Overview
Problem
Existing Micro LED displays have a low pixel aperture ratio and transmittance due to the separate arrangement of LED chips and pixel circuits, which affects brightness uniformity and display quality.
Innovation Solution
A driving backplane design that integrates pixel driving circuits, electrodes, and potential wires with a multiplexing controller, where the multiplexing controller's projection overlaps with the micro light emitting diode bonding region, and control wires are superimposed with potential wires, reducing the proportion of signal lines and increasing pixel aperture ratio and transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If LED chips and pixel circuits are arranged separately with separate wire layouts, then device functionality is ensured, but pixel aperture ratio and transmittance are reduced
Solution Approach 1:
The patent merges the control wire and potential wire into a single integrated wire structure. The control wire is positioned at a first height and the potential wire at a second height, both within the same wire region, eliminating the need for separate wire layouts and increasing the pixel aperture ratio while maintaining device functionality
Solution Approach 2:
The patent utilizes vertical stacking in the height dimension to resolve wire routing conflicts. By positioning the control wire and potential wire at different heights (first height and second height respectively) within the same planar region, the design achieves three-dimensional wire integration that increases transmittance without compromising electrical connectivity
2Reliability
If multiple pixel driving circuits are coupled with separate signal lines, then signal transmission reliability is ensured, but the proportion of signal lines increases reducing transmittance
Solution Approach 1:
The patent implements multi-functionality by having a single wire serve dual purposes: the control wire provides control signals and the potential wire provides power potential. This integrated structure allows multiple pixel driving circuits to share the same wire region with different height layers, reducing the overall proportion of signal lines while maintaining reliable signal transmission through the stacked configuration
Data Source
AI summary
A driving backplane, a display panel and a display device are disclosed. The driving backplane includes: a base substrate; a plurality of pixel driving circuits located on the base substrate; an electrode located on a side of each of the pixel driving circuits facing away from the base substrate and coupled with the pixel driving circuits; and a potential wire located between the electrode and the base substrate and coupled with the pixel driving circuits. Every at least two pixel driving circuits are coupled with a same signal line through a multiplexing controller, an orthographic projection of the controller on the base substrate completely falls into a range of a corresponding micro light emitting diode bonding region, and an orthographic projection of a control wire coupled with the controller on the base substrate completely falls into a range of an orthographic projection of the potential wire on the base substrate.