Thyristor Light-Emitting Unit With Low-Voltage Permission Control
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Solution Overview
Problem
Existing light-emitting devices require high voltages for light emission, which can be inefficient and difficult to manage with global parallel I/O signals, especially when lower voltage signals are needed for light emission permission.
Innovation Solution
A light-emitting device with light-emitting units incorporating thyristor functions and separate light emission permission thyristors that allow light emission at a lower voltage, independent of the primary light emission voltage, using a permission signal generation unit to control the light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a high voltage is applied to the light-emitting unit to increase light intensity, then the light emission intensity is improved, but the voltage requirement becomes incompatible with standard low-voltage GPIO signals
Solution Approach 1:
The patent introduces a voltage conversion mechanism that acts as an intermediary between the low-voltage GPIO signal and the high-voltage light-emitting unit. The microcontroller generates a low-voltage permission signal that is converted to a high-voltage drive signal through a voltage conversion circuit, enabling standard GPIO signals to control high-intensity light emission without direct voltage conflict.
Solution Approach 2:
The control system is segmented into separate functional blocks: a permission signal generation unit that handles low-voltage logic control, and a voltage conversion unit that handles high-voltage drive signals. This segmentation allows each block to operate at its optimal voltage level while maintaining system-wide coordination through defined interfaces.
2Illumination intensity
If a high voltage is used for light emission, then sufficient light output is achieved, but the system complexity increases due to voltage level management
Solution Approach 1:
The voltage conversion circuit is integrated directly into the light-emitting unit, making it self-sufficient for voltage conversion. The unit automatically converts the low-voltage permission signal to the required high-voltage drive signal internally, eliminating the need for external voltage management circuitry and reducing overall system complexity.
3Power
If the light-emitting unit requires high voltage for operation, then light emission performance is maintained, but the signal permission voltage must be high which limits interface options
Solution Approach 1:
The permission signal input interface is designed to accept universal low-voltage logic signals (such as standard 3.3V or 5V GPIO signals) while the internal voltage conversion circuit handles the transformation to high-voltage operation. This multi-functional interface design allows the same input pin to work with various microcontroller types and signal standards while maintaining high-power light emission capability.
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 efficient light emission at lower voltages, reducing the complexity of signal management and allowing for the use of lower voltage signals like GPIO outputs, thereby improving the operational efficiency of the light-emitting device.
Implementation Method 1
a light-emitting element whose threshold voltage or threshold current is externally controllable by light
Implementation Method 2
a light-emitting element including a function of a thyristor
Data Source
AI summary
A light-emitting device includes one or more light-emitting units each including a light-emitting element including a function of a thyristor; an electrode for light emission to which a first voltage is applied for light emission of the light-emitting unit; and one or more light emission permission thyristors that permit the light-emitting element to emit light by a second voltage that is lower than the first voltage and set irrespective of the first voltage.