Mini LED Backlight Module Wire Arrangement Parasitic Capacitance
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Solution Overview
Problem
Existing backlight modules using Mini LEDs face challenges in efficiently arranging and connecting light zones, anode wires, and cathode wires, leading to parasitic capacitance issues that affect lighting performance.
Innovation Solution
The proposed backlight module employs a base substrate with light zones arranged in an array, where Mini LEDs are connected in series by lead wires, and anode and cathode wires are connected to provide time-division multiplexing, with specific arrangements of anode and cathode wires to minimize overlap and parasitic capacitance, ensuring optimal electrical connections and reduced parasitic voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If anode wires and cathode wires are arranged closely to reduce the number of wires, then wire complexity is reduced, but parasitic capacitance increases affecting lighting performance
Solution Approach 1:
The patent divides the wire arrangement into distinct spatial regions, separating anode wires and cathode wires into different areas to reduce their overlap and interaction, thereby minimizing parasitic capacitance while maintaining manageable complexity
Solution Approach 2:
The patent utilizes the spatial dimension by arranging anode and cathode wires in different regions and controlling their projections to avoid overlap, effectively using spatial separation to reduce parasitic capacitance without increasing wire count
2Manufacturing precision
If light zones are arranged in a dense array to improve display resolution, then picture quality is improved, but electrical connection complexity increases
Solution Approach 1:
The patent makes individual wires serve multiple functions by having them connect to multiple light zones, reducing the total number of wires needed while maintaining precise control over each light zone's electrical connections
Solution Approach 2:
The patent controls the spatial arrangement and projections of wire connections to manage complexity in dense light zone arrays, using spatial optimization to reduce connection interference and simplify the electrical connection structure
3Loss of substance
If wire projections overlap to reduce wire length, then material usage is reduced, but parasitic voltage increases affecting lighting performance
Solution Approach 1:
The patent segments the wire routing paths to avoid overlapping projections, separating the spatial paths of anode and cathode wires to eliminate parasitic voltage generation while managing material usage through optimized routing
Data Source
AI summary
A backlight module includes: a plurality of lamp groups arranged in an array on a base substrate, each lamp group comprises a plurality of mini light emitting diodes, a plurality of lead wires in the lamp group, an external anode and an external cathode; a plurality of anode wires and cathode wires electrically connected to external anodes and external cathodes of a plurality of rows of lamp groups, respectively, wherein in at least some of the plurality of cathode wires, one same cathode wire is electrically connected to the external cathodes of the lamp groups located in different rows. Same-type anode wires comprise a plurality of anode wires to which same-wire lamp groups are connected, and orthographic projections of the same-type anode wires on the base substrate do not overlap with an orthographic projection of one same lead wire in the lamp group on the base substrate.