Function liquid filling apparatus, liquid droplet ejection apparatus equipped with the same, method of manufacturing electro-optical device, electro-optical device, and electronic equipment
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United States of America Patent
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May 3, 2005
Grant Date -
Dec 16, 2004
app pub date -
Mar 3, 2004
filing date -
Mar 5, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A function liquid filling device includes: a feed unit for feeding a function liquid in a function liquid tank toward head caps coupled to function liquid droplet ejection heads through the function liquid droplet ejection heads; a detection unit for detecting that the fed function liquid reaches the head caps; and a control unit for stopping the drive of the feed unit based on a result of detection by the detection unit. The detection unit includes: a crystal oscillator disposed in the head cap and/or a waste liquid passage; and a detector for detecting the presence or absence of the function liquid based on a change in a resonance frequency of the crystal oscillator.
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