LED Voltage Adjustment via Segmented Bonding
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Solution Overview
Problem
Existing light-emitting diode (LED) devices often deviate from their predetermined operating voltage during fabrication, leading to inconsistent light emission.
Innovation Solution
A light-emitting device with an equivalent circuit featuring multiple terminals and light-emitting diodes connected in series, allowing for adjustable operating voltage through selective bonding pad connections, enabling emission control across various voltage levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If light-emitting diodes are designed with a predetermined operating voltage, then the device structure is simple, but the actual operating voltage deviates from the predetermined value during fabrication
Solution Approach 1:
The light-emitting device is segmented into multiple light-emitting units (first, second, third light-emitting units) with different voltage characteristics. Each unit can be independently controlled through selective connection to terminal electrodes, allowing the overall operating voltage to be adjusted by combining different units in series based on their actual voltage values.
Solution Approach 2:
The device transitions from a fixed predetermined voltage design to a dynamic adjustable voltage system. By selectively connecting different light-emitting units to terminal electrodes through bonding pads, the operating voltage can be dynamically adjusted to match the actual voltage characteristics of the fabricated LEDs, resolving the voltage deviation issue.
2Manufacturing precision
If the operating voltage is adjusted to compensate for fabrication deviations, then the voltage precision is improved, but the device structure becomes more complex
Solution Approach 1:
The device is divided into multiple light-emitting units with different voltage characteristics that can be selectively combined. This segmentation allows voltage adjustment without requiring complex external circuitry, as the adjustment is achieved by simply selecting which segmented units to connect in series.
Solution Approach 2:
The terminal electrodes and bonding pad structure serve multiple functions: they provide electrical connection for current driving, enable voltage adjustment through selective bonding, and allow for flexible configuration of different light-emitting units. This multi-functionality reduces the need for additional adjustment components.
3Adaptability or versatility
If multiple light-emitting units with different voltage characteristics are used, then the operating voltage adaptability is improved, but the ease of manufacture decreases
Solution Approach 1:
During the fabrication process, light-emitting units with different voltage characteristics are prepared in advance on the same substrate. The bonding pads are pre-positioned and configured, allowing for selective connection during assembly. This preliminary preparation simplifies the manufacturing process by avoiding complex post-fabrication adjustments.
Solution Approach 2:
Multiple light-emitting units with different voltage characteristics are merged into a single integrated device structure on one substrate. This combining approach allows for flexible voltage configuration while maintaining manufacturing efficiency, as all units are fabricated together and then selectively connected through the bonding pad system.
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
Enables precise adjustment of operating voltage, ensuring consistent light emission and addressing deviations in predetermined voltage settings, thereby enhancing the reliability and flexibility of LED devices.
Implementation Method 1
a first light-emitting diode, arranged between the first terminal and the second terminal, configured to not emit light when a voltage is applied between the second terminal and one of the third terminal and the fourth terminal, and configured to emit light when a voltage is applied between the first terminal and one of the third terminal and the four the terminal
Data Source
AI summary
The light-emitting device having an equivalent circuit, includes at least four terminals, numbered from first terminal to fourth terminal, for electrical power feeding; a first light-emitting diode, arranged between the first terminal and the second terminal, configured to not emit light when a voltage is applied between the second terminal and one of the third terminal and the fourth terminal, and configured to emit light when a. voltage is applied between the first terminal and one of the third terminal and the four the terminal; and a second light-emitting diode, arranged between the third terminal and the fourth terminal, and configured to not emit light when the voltage is applied between the third terminal and one of the first terminal and the second terminal and configured to emit light when a voltage is applied between the fourth terminal and one of the first terminal and the second terminal.