LED Light Emitting Device with Time Delay Mechanism for Heat Dissipation
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Solution Overview
Problem
Conventional light emitting devices using semiconductor LEDs face challenges with heat dissipation and energy consumption, particularly in larger sizes, and often have compact electrode layouts that restrict light emission areas due to current crowding issues.
Innovation Solution
A light emitting device incorporating a time delay mechanism in its electrical connection with a power source to alternately and sequentially drive multiple light emitting units, utilizing a phase shifter and rectifying circuit to manage power signals, and featuring a transparent electrode layer for improved current spreading, allowing for larger light emission areas and reduced energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a compact electrode layout is used to achieve good current spreading and avoid over-heating, then current distribution is improved, but the opening area for light emission becomes unnecessarily small
Solution Approach 1:
The patent applies periodic action by alternately driving different heterojunction regions in sequential time periods. The time delay mechanism ensures that only one region is active at a time, allowing compact electrode layouts to achieve good current spreading without compromising light emission area, as each region can be fully utilized when activated.
2Area of stationary object
If LEDs have a relatively large size to increase light emission area, then light emission area is improved, but heat dissipation and energy consumption issues become more noticeable
Solution Approach 1:
The patent uses periodic action to alternately drive different heterojunction regions in large-sized LEDs. By time-shifting the power signals, the system activates only one region at a time, which improves heat dissipation by avoiding simultaneous operation of multiple regions and reduces energy consumption while maintaining large light emission area.
Solution Approach 2:
The patent segments the LED structure into multiple heterojunction regions that can be independently driven. This segmentation allows the large LED to operate with reduced current density in each active region, improving heat dissipation and energy efficiency while maintaining the overall large light emission area.
3Illumination intensity
If multiple light emitting units are driven simultaneously to increase light output, then illumination intensity is improved, but energy consumption and heat generation increase
Solution Approach 1:
The patent applies periodic action to drive multiple light emitting units sequentially rather than simultaneously. The time delay mechanism ensures that different heterojunction regions are activated in alternating time periods, achieving high illumination intensity through cumulative light output while reducing energy consumption and heat generation by avoiding simultaneous operation of all units.
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 effectively enhances heat dissipation and energy efficiency by alternately driving heterojunction regions, reducing the need for compact electrode layouts and increasing the light emission area, while also enabling the production of desired color combinations through controlled power signal management.
Implementation Method 1
each light emitting unit being driven alternately and sequentially using the power source and the time delay mechanism
Data Source
AI summary
A light emitting device includes a time delay mechanism in electrical connection with a power source for time shifting at least a portion of a power signal outputted by the power source and a plurality of light emitting units formed by at least a light emitting diode (LED)structure, each light emitting unit being driven alternately and sequentially using the power source and the time delay mechanism.