Light-Emitting Device With Mode Switching Driver Circuit
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Solution Overview
Problem
Existing light-emitting devices lack the ability to switch between single and intermittent light emission modes, adjust light output, and operate with low power consumption while minimizing shadow creation and size/weight.
Innovation Solution
A light-emitting device comprising a driver circuit, constant current power supply, and light-emitting panel with a microcomputer and pulse-interval modulation circuit to control light emission, incorporating optical and distance sensors for adaptive light adjustment, and a flexible substrate for compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a light-emitting device uses a conventional structure without mode-switching capability, then the device is simple in structure, but it cannot switch between single light emission and intermittent light emission modes
Solution Approach 1:
The patent implements dynamic mode switching by introducing a driver circuit with a mode switching unit that can dynamically change the light emission pattern between single and intermittent modes based on control signals, making the device adaptable to different application scenarios without requiring multiple separate devices
Solution Approach 2:
The light-emitting device is designed with multi-functionality by integrating both single light emission and intermittent light emission capabilities into one device through the driver circuit's mode switching unit, allowing the same device to serve multiple purposes such as illumination and security warning
2Illumination intensity
If a light-emitting device uses high intensity light for security purposes, then the light emission intensity is sufficient for security warning, but it produces significant shadows and consumes more power
Solution Approach 1:
The patent employs periodic intermittent light emission instead of continuous high-intensity light, where the light is emitted in repeated short bursts at controlled intervals. This periodic action maintains sufficient peak intensity for security warning while reducing overall power consumption and minimizing shadow production during non-emission periods
Solution Approach 2:
The device dynamically adjusts light emission characteristics by switching between different modes (single emission vs. intermittent emission) and controlling the pulse width and frequency of intermittent emissions, optimizing the balance between illumination intensity, power consumption, and shadow reduction based on specific application needs
3Weight of moving object
If a light-emitting device is designed to be portable and compact, then the device size and weight are reduced, but the battery capacity and power supply duration are limited
Solution Approach 1:
By using intermittent light emission with controlled pulse widths and frequencies, the device significantly reduces average power consumption compared to continuous emission. This allows portable devices with limited battery capacity to operate for extended periods, addressing the power duration limitation imposed by compact design
Solution Approach 2:
The driver circuit dynamically controls the power delivery to the light-emitting panel, adjusting current pulse parameters based on the selected emission mode. This dynamic power management optimizes energy utilization, extending battery life in portable applications without requiring larger power supplies that would increase device weight
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 switching between single and intermittent light modes, adjusts light output based on environmental conditions, reduces power consumption, minimizes shadow creation, and achieves a compact, reliable design suitable for portable applications.
Implementation Method 1
a light-emitting device that includes a driver circuit that can supply a control pulse signal, a constant current power supply that is supplied with the control pulse signal and can supply a constant current pulse, and a light-emitting panel that is supplied with the constant current pulse
Data Source
AI summary
A light-emitting device that can switch between two modes: single light emission and intermittent light emission is provided. The light-emitting device includes a driver circuit that can supply a control pulse signal, a constant current power supply that is supplied with the control pulse signal and can supply a constant current pulse, and a light-emitting panel that is supplied with the constant current pulse. The driver circuit includes a start switch circuit that can supply a start signal, a pulse-interval modulation circuit that can supply a pulse-interval modulation signal, and a microcomputer that is supplied with the start signal and the pulse-interval modulation signal and can supply the control pulse signal.