Liquid Droplet Ejecting Head Dual Latch Timing Control
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Solution Overview
Problem
Conventional liquid droplet ejecting apparatuses face challenges in efficiently processing data transmission to shift registers across multiple nozzle rows without increasing data transmission speed or decreasing recording speed, particularly when adjusting the position of ink droplets to a finer pitch than the pixel pitch, leading to complex trigger control and reduced recording efficiency.
Innovation Solution
The apparatus employs a liquid droplet ejecting head with multiple nozzle rows, each equipped with a drive circuit containing a first and second latch section for storing ejection data, where the timing for storing data into the first latch is synchronized across all nozzle rows, and the timing for transferring data from the first to the second latch can be independently adjusted, using a common trigger signal to simplify the control process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single latch is used for each nozzle row to adjust ink arrival position at finer pitch, then positioning precision is improved, but trigger control complexity increases
Solution Approach 1:
The single latch function is segmented into two separate latch sections (first latch section and second latch section). The first latch section receives data from the shift register at synchronized timing across all nozzle rows, while the second latch section receives data from the first latch at independently adjustable timing for each nozzle row. This segmentation allows fine pitch adjustment of ink arrival positions without requiring complex trigger control signals.
2Productivity
If data transmission speed is increased to maintain recording speed with multiple nozzle rows, then recording efficiency is maintained, but data transmission complexity increases
Solution Approach 1:
The data transmission process is segmented into two stages: first, data is transmitted to the first latch section at synchronized timing for all nozzle rows; second, data is transmitted from the first latch section to the second latch section at independently adjustable timing. This segmentation simplifies the trigger control structure while maintaining recording efficiency.
Solution Approach 2:
The first latch section acts as an intermediary between the shift register and the second latch section. It receives data at synchronized timing from the shift register and then transmits to the second latch section at independently adjustable timing, thereby simplifying the overall control structure.
3Measurement precision
If different timing is used for ejection from each nozzle row to adjust position, then positioning precision is improved, but data transmission timing control becomes more complex
Solution Approach 1:
The timing control is segmented into two independent stages: synchronized timing for data input to the first latch section, and independently adjustable timing for data transfer from the first latch section to the second latch section. This allows precise position adjustment for each nozzle row while simplifying the control mechanism.
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 approach enables efficient data transmission trigger processing and precise adjustment of ink droplet arrival positions at a finer pitch than the pixel pitch, enhancing recording resolution and simplifying the control system structure without requiring increased data transmission speed or reduced recording speed.
Implementation Method 1
a piezoelectric element serving as a pressurization section and having a voltage applied thereto
Data Source
AI summary
An apparatus for ejecting liquid droplets, including: ejecting head main body having a plurality of nozzle rows; a pressure generation chamber; a pressurization section for giving pressure to the pressure generation chamber; and plural drive circuits corresponding to the nozzle rows, each drive circuit including: a first storage section for storing the ejection data corresponding to a nozzle row; a first latch section for storing the ejection data from the first storage section; a second latch section for storing the ejection data from the first latch section; and a drive section for driving the pressurization section based on the ejection data stored the second latch section; and a control section, which ensures that a timing for storing the ejecting data into the first latch section is synchronized among the nozzle rows, and a timing for storing the ejecting data into the second latch section can be adjusted independently.