Differential Signal Receiving Circuit for Inkjet Printers
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Solution Overview
Problem
As the number of nozzles in ink jet printers increases, the power consumption of the control signal receiving portion for restoring differential signals also increases, leading to higher power consumption in liquid ejecting apparatuses, necessitating a reduction in power consumption for high-speed signal transmission.
Innovation Solution
A liquid ejecting apparatus with a differential signal output circuit and two receiving circuits, where the first receiving circuit has higher power consumption and operates only when the drive element is driven, while the second receiving circuit, with lower power consumption, operates when the drive element is not driven, and both are integrated in one integrated circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of nozzles is increased to improve printing accuracy, then printing accuracy is improved, but power consumption of the control signal receiving portion increases
Solution Approach 1:
The receiving circuit is divided into two separate circuits: a first receiving circuit for restoring differential signals with high power consumption but high speed, and a second receiving circuit for restoring differential signals with low power consumption. This segmentation allows the system to switch between high-performance mode and low-power mode based on operational requirements, resolving the contradiction between printing accuracy (requiring more nozzles and higher data transfer) and power consumption.
Solution Approach 2:
The system dynamically switches between the first receiving circuit and the second receiving circuit based on operational conditions. The control signal determining circuit determines which circuit to use, allowing the system to adapt its power consumption characteristics to the current printing workload and accuracy requirements, thereby resolving the static contradiction between performance and power usage.
2Speed
If differential signal restoration is performed at high speed to meet increasing data transfer demands, then signal transmission speed is improved, but power consumption of the receiving circuit increases
Solution Approach 1:
The receiving circuit is divided into two separate circuits: a first receiving circuit for restoring differential signals with high power consumption but high speed, and a second receiving circuit for restoring differential signals with low power consumption. This segmentation allows the system to switch between high-performance mode and low-power mode based on operational requirements, resolving the contradiction between signal transmission speed and power consumption.
Solution Approach 2:
The system uses periodic switching between the first and second receiving circuits based on the printing workload. The control signal determining circuit enables the system to alternate between high-speed restoration (when data transfer demand is high) and low-power mode (when demand is lower), effectively managing the trade-off between transmission speed and power consumption over time.
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
This configuration allows for reduced power consumption and efficient high-speed signal transmission, achieving both high-speed signal propagation and lower energy usage in the liquid ejecting apparatus.
Implementation Method 1
an apparatus using a piezoelectric element as a drive element such as a piezo element is known
Data Source
AI summary
A liquid ejecting apparatus includes a differential signal output circuit that outputs a pair of differential signals based on an original control signal, a pair of first signal wirings that are electrically coupled to the differential signal output circuit and propagate the differential signals, a first receiving circuit that is electrically coupled to the first signal wirings, a second receiving circuit that is electrically coupled to the first signal wirings, and an ejector that includes a drive element and that ejects a liquid from a nozzle by driving the drive element, in which the first receiving circuit outputs a control signal for controlling driving of the drive element based on the differential signals, power consumption of the first receiving circuit is larger than power consumption of the second receiving circuit, and the first receiving circuit and the second receiving circuit are electrically coupled by a second signal wiring.