Optical Output Device Bus Control for Independent LED Segmentation
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Solution Overview
Problem
Existing LED string systems fail to independently control LEDs, leading to issues where a single faulty LED can render all others in the string unusable, and require complex electronic circuits for individual control.
Innovation Solution
An optical output device with a bus system comprising multiple bus wires and units, each equipped with optical output elements, storage units for address data and counter values, and a comparison unit that allows implicit addressing and bulk data transfer, enabling independent control of LEDs without sequential software components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a serial connection of LEDs is used to simplify the circuit, then the device complexity is reduced, but the reliability deteriorates because a single faulty LED renders all other LEDs in the string unusable
Solution Approach 1:
The LED string is divided into multiple independent segments or groups, where each segment can be controlled independently. This segmentation allows a fault in one segment to be isolated and does not affect the operation of other segments, thereby improving reliability while maintaining relatively simple circuit architecture.
Solution Approach 2:
Control electronics are distributed throughout the LED string rather than centralized at one end. These intermediary control units enable each segment to operate independently and can communicate with the power source and control system individually, preventing a single point of failure from disabling the entire string.
2Reliability
If each LED is connected to a separate output of a microcontroller to enable independent control, then the reliability is improved, but the device complexity increases significantly
Solution Approach 1:
Multiple control functions are merged into distributed control units that are integrated along the LED string. Each control unit handles multiple tasks (local control, data reception, power management) rather than requiring separate dedicated circuits for each function, reducing overall complexity while maintaining independent control capability.
Solution Approach 2:
The distributed control units are designed to perform multiple functions: they serve as addressable control points for individual LED groups, act as signal repeaters along the bus, and provide local fault detection and isolation. This multi-functionality reduces the need for separate specialized components.
3Adaptability or versatility
If sequential software components are used to control LEDs, then the control flexibility is improved, but the processing speed deteriorates due to the sequential nature of software execution
Solution Approach 1:
The patent replaces sequential software-based control with a hardware-based implicit addressing mechanism. The distributed control units automatically determine their addresses and data reception timing through hardware logic (such as signal propagation delay or physical position on the bus) rather than through sequential software instruction execution, dramatically increasing data transmission speed while maintaining control flexibility.
Data Source
AI summary
An optical output device is described that includes one bus system. The bus system includes two bus wires of a bus, two bus units and one bus control unit. The two bus units may include one optical output element one output control unit whose output is connected to the one optical output element a first storage unit for storing address data of the respective bus unit a second storage unit for storing a counter value, a comparison unit whose inputs are connected to the first storage unit and to the second storage unit, and a control unit whose input is connected to an output of the comparison unit and which controls the takeover of data from the bus into the output control unit depending on an output signal or on output data of the comparison unit.