Integrated Full-Color LED Package with On-Chip Driving Mechanism
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Solution Overview
Problem
Conventional full-color LED display screens suffer from large intervals between adjacent LEDs due to external current limiting resistors and driving elements, leading to poor image quality, circuit malfunctions, and susceptibility to radio frequency and electromagnetic interference.
Innovation Solution
A package structure for full-color LEDs incorporating an IC chip with integrated driving mechanism, current limiting resistors, and LED dice, which reduces the interval between LEDs, minimizes interference, and simplifies the circuit, allowing for improved mixing uniformity and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If current limiting resistors and driving elements are disposed externally on PCB, then the full-color LED can be controlled to display various colors, but the interval between adjacent full-color LEDs becomes overlarge, resulting in poor image quality and low resolution
Solution Approach 1:
The patent merges the driving element and current limiting resistors into an integrated circuit chip that is packaged together with the full-color LED. This integration eliminates the need for external PCB mounting of these components, thereby reducing the interval between adjacent LEDs and improving image quality while maintaining color display capability.
Solution Approach 2:
The integrated circuit chip serves multiple functions simultaneously: it acts as the driving element for controlling the LED, provides current limiting through integrated resistors, and enables color display control. This multi-functionality allows the system to maintain full color display capability while achieving compact integration.
2Adaptability or versatility
If current limiting resistors and driving elements are disposed externally on PCB, then the full-color LED can be controlled, but the circuit becomes complex and susceptible to RFI and EMI
Solution Approach 1:
By merging the driving element and current limiting resistors into the packaged LED structure, the patent reduces the number of external connections and exposed circuit elements. This integration minimizes the antenna effects and parasitic inductances that make external circuits susceptible to RFI and EMI, while preserving full control capability.
3Productivity
If flexible circuit board is used to connect multiple full-color LEDs, then the display screen can be assembled, but bad contacts occur between soldering pads and components due to bending
Solution Approach 1:
The patent merges all necessary driving and limiting components into the LED package itself, eliminating the need for flexible circuit boards and external soldering connections. This integration removes the source of contact reliability problems caused by bending, while maintaining assembly capability through the packaged structure.
4Manufacturing precision
If IC chip with integrated driving mechanism is used, then the interval between LEDs is reduced and image quality improves, but the manufacturing complexity increases
Solution Approach 1:
The patent combines multiple components (LED dice, current limiting resistors, and driving element) into a single packaged unit. While the internal structure is more complex, the packaging process uses standard semiconductor manufacturing techniques, and the integrated structure simplifies system assembly and reduces the need for precise external component placement, thereby maintaining manufacturing feasibility.
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 solution enables high-resolution, compact, and cost-effective LED display screens with reduced radio frequency and electromagnetic interference, enhancing image quality and power efficiency.
Implementation Method 1
a red LED dice, a green LED dice and a blue LED dice configured together with current limiting resistors
Implementation Method 2
LED (Light Emitting Diode) has been invented in 1970s
Data Source
AI summary
A package structure of full-color LED (Light Emitting Diode) with driving mechanism includes an IC (Integrated Circuit) chip, a red LED dice, a green LED dice, a blue LED dice, and corresponding current limiting resistors. The IC chip has a driving mechanism to control the red LED dice, the green LED dice, and the blue LED dice. By the specific arrangement of these internal elements, the package structure generates full-color light with high resolution, compact structure and high mixing uniformity, and also achieves low cost and decreases usage of space.