Ejection abnormality detection apparatus, liquid droplet ejection apparatus, and display device production method



PROBLEM TO BE SOLVED: To provide an ejection abnormality detection apparatus capable of preventing a lowered yield caused by ejection abnormality. SOLUTION: The ejection abnormality detection apparatus 23 is provided with a plurality of input circuits into which the respective voltage values of a plurality of piezoelectric elements from a liquid droplet ejection head that ejects liquid droplets from a plurality of nozzles by means of a plurality of piezoelectric elements, a selection circuit that selects an input circuit from the plurality of the input circuits one after another, a judgment part that judges whether the ejection from the nozzle that ejects liquid droplets by means of the piezoelectric element corresponding to the selected input circuit according to the voltage value inputted into the selected input circuit is saisfactory or not, and an output circuit that outputs the judgment result on ejection from the nozzle. COPYRIGHT: (C)2009,JPO&INPIT
【課題】噴射異常に起因する歩留まりの低下を防止することができる噴射異常検出装置を提供する。 【解決手段】噴射異常検出装置23において、複数の圧電素子により複数のノズルからそれぞれ液滴を噴射する液滴噴射ヘッドから、複数の圧電素子の各々の電圧値がそれぞれ入力される複数の入力回路と、複数の入力回路から一つの入力回路を順次選択する選択回路と、選択した入力回路に入力された電圧値に基づいて、選択した入力回路に対応する圧電素子により液滴が噴射するノズルの噴射良否を判定する判定部と、ノズルの噴射良否判定結果を出力する出力回路とを備える。 【選択図】図3




Download Full PDF Version (Non-Commercial Use)

Patent Citations (6)

    Publication numberPublication dateAssigneeTitle
    JP-2005095712-AApril 14, 2005Shibaura Mechatronics Corp, 芝浦メカトロニクス株式会社溶液供給装置及び溶液供給装置の検査方法
    JP-2005349594-ADecember 22, 2005Seiko Epson Corp, セイコーエプソン株式会社Liquid drop ejector, method and program for recovering liquid drop ejection performance
    JP-2006026584-AFebruary 02, 2006Toshiba Corp, 株式会社東芝Droplet injection device and display device manufacturing method
    JP-2006051700-AFebruary 23, 2006Fuji Xerox Co Ltd, 富士ゼロックス株式会社Inkjet recording device and inkjet recording method
    JP-H06180295-AJune 28, 1994Oji Kako Kk, 王子化工株式会社Method and apparatus for detecting foreign matter of sheet
    JP-H08292312-ANovember 05, 1996Canon Inc, キヤノン株式会社カラーフィルタの修正方法および修正装置及びカラーフィルタ及び液晶表示装置及びこの液晶表示装置を備えた装置

NO-Patent Citations (0)


Cited By (2)

    Publication numberPublication dateAssigneeTitle
    KR-101096749-B1December 21, 2011재단법인 구미전자정보기술원, 주식회사 이노템즈노즐 검사 장치 및 방법
    US-8662624-B2March 04, 2014Kabushiki Kaisha ToshibaForeign object detection device, foreign object detection method, droplet discharging device, and droplet discharging method