Switch Driving Device for Sequential Lighting Control
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Solution Overview
Problem
Conventional light-emitting devices with sequential lighting functions require a microprocessor for control, leading to increased complexity, power consumption, and component count, as well as the need for multiple control lines and EMC testing challenges.
Innovation Solution
A switch driving device with a logic circuit that automatically controls the ON/OFF states of switch elements in a sequential pattern without a microprocessor, using a start delay circuit, frequency setter, and watchdog timers, and can operate in both sequential and all-lit modes, reducing the need for external control signals and components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a microprocessor is used to control sequential lighting in light-emitting devices, then the lighting control function is achieved, but the device complexity increases
Solution Approach 1:
The patent extracts the microprocessor from the light-emitting device, removing the complex control unit while retaining the sequential lighting function through a simplified driving device that uses basic logic circuits and timing mechanisms instead of a full microprocessor system.
Solution Approach 2:
The driving device is designed to automatically generate sequential lighting patterns through internal timing circuits and logic operations, eliminating the need for external microprocessor control. The system serves itself by using simple circuit elements to create the desired lighting sequences.
2Adaptability or versatility
If a microprocessor is used to control sequential lighting, then the lighting control function is achieved, but power consumption increases
Solution Approach 1:
The patent replaces the expensive, high-power microprocessor with simple, low-power logic circuits and timing components that consume minimal energy. These basic electronic components achieve the same sequential lighting control function with significantly reduced power requirements.
3Adaptability or versatility
If a microprocessor is used for control, then sequential lighting is achieved, but the number of components increases
Solution Approach 1:
The patent combines multiple functions (timing, sequencing, control logic) into a single integrated driving device that uses a small number of components. Instead of having separate microprocessor, memory, and control circuits, these functions are merged into a compact circuit implementation.
4Adaptability or versatility
If multiple control lines are used for microprocessor control, then the control function is achieved, but EMC testing complexity increases
Solution Approach 1:
The patent removes the microprocessor control system that requires multiple control lines and complex signal interfaces. The simplified driving device uses fewer signal lines and simpler control mechanisms, thereby reducing electromagnetic compatibility testing requirements.
Data Source
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AI summary
A switch driving device 10 comprises: multichannel switch elements SW1 to SW8 which are connected in parallel to a plurality of light-emitting elements included in a vehicle-mounted light-emitting device; and a logic portion 120 which automatically starts a series of switch driving sequence so that the on-off states of the switch elements SW1 to SW8 are sequentially switched in a predetermined pattern in response to the power-on of the device.