Sequential Turn Signal Lighting With Shared Clock Wiring
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Solution Overview
Problem
Existing light emission control systems for vehicle direction indicator lamps face challenges in achieving sequential lighting or extinguishing at regular time intervals without increasing costs and using excessive wiring, as current methods require microprocessors and multiple leads.
Innovation Solution
A light emission control system comprising two controllers with clock generators that synchronize the switching of light-emitting elements between lit and extinguished states using a variable clock signal, allowing for sequential control with reduced wiring and lower costs by sharing a common clock lead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a microprocessor is used to control the timing of light-emitting elements, then the lighting state can change at regular time intervals, but the cost increases
Solution Approach 1:
The patent replaces expensive microprocessors with inexpensive clock generators that produce clock signals. These clock signals are used temporarily to trigger sequential lighting, after which the system returns to a low-power state. This approach uses cheap, simple components instead of expensive intelligent controllers, resolving the contradiction between timing precision and cost.
Solution Approach 2:
The system uses its own clock signal to automatically trigger the sequential lighting sequence without requiring external microprocessor control. The clock generator self-regulates the timing, and the system autonomously executes the lighting pattern, eliminating the need for expensive external control devices while maintaining regular time intervals.
2Adaptability or versatility
If multiple light emission control devices are used to control separate light-emitting element arrays, then sequential lighting can be achieved across distributed locations, but the number of leads (cables) increases
Solution Approach 1:
The patent combines multiple clock signals into a single shared clock lead that serves multiple light emission control devices. Instead of each device requiring separate control wiring, all devices share a common clock signal path, dramatically reducing the number of leads needed while maintaining the ability to control distributed light-emitting element arrays sequentially.
Solution Approach 2:
The single clock lead serves multiple functions by distributing the clock signal to multiple light emission control devices simultaneously. This universal wiring approach allows one cable to perform what would traditionally require multiple separate cables, reducing wiring complexity while maintaining distributed control capability.
Data Source
AI summary
In a first light emission control device, a clock signal is generated, and after a first driving sequence starts to be performed in which the respective states of light-emitting elements in a first light-emitting element array are sequentially switched synchronously with the clock signal, at a particular time point a characteristic of the clock signal is changed from a first characteristic to a second characteristic. After the change, in a second light emission control device, a second driving sequence is performed in which the respective states of light-emitting elements in a second light-emitting element array are sequentially switched synchronously with the clock signal.