Patent SG-11201805328Q-A (SG)
Title: Head unit control circuit
Inventor: YAMADA TOMONORI
IPC: B41J2/14
Filed: 2016-12-22
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau „ (10) International Publication Number (43) International Publication Date ^ ^ WO 2017/111065 A1 29 June 2017 (29.06.2017) WIPO I PCT (51) International Patent Classification: B41J2/01 (2006.01) B41J2/14 (2006.01) (21) International Application Number: PCT/JP2016/088461 (22) International Filing Date: (25) Filing Language: (26) Publication Language: 22 December 2016 (22.12.2016) English English (30) Priority Data: 2015-252876 25 December 2015 (25.12.2015) JP (71) Applicant: SEIKO EPSON CORPORATION [JP/JP]; 1- 6, Shinjuku 4-chome, Shinjuku-ku, Tokyo, 1608801 (JP). (72) Inventors: YAMADA, Tomonori; c/o SEIKO EPSON CORPORATION, 3-5, Owa 3-chome, Suwa-shi, Nagano, 3928502 (JP). ENDO, Hironori; c/o SEIKO EPSON CORPORATION, 3-5, Owa 3-chome, Suwa-shi Nagano, 3928502 (JP). MATSUYAMA, Toru; c/o SEIKO EPSON CORPORATION, 3-5, Owa 3-chome, Suwa-shi Nagano, 3928502 (JP). (81) Designated States (unless otherwise indicated, for every kind of national protection available)'. AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available)'. ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: (74) Agents: FUSE, Yukio et al.; 8th Floor, Hirata Building, 8- — with international search report (Art. 21(3)) 16, Sarugaku-cho 2-chome, Chiyoda-ku, Tokyo, 1010064 (JP). (54) Title: HEAD UNIT CONTROL CIRCUIT = TERMINAL:: ::::NAME • •: (CN1) SIGNAL NAME : TERMINAL-: : NAME : . (QN2). SIGNAL NAME /•II-1 GND 7N2-14 GND ZN1 2 Tsig ZN2-I3 GND . ..ZN1-3 CND ZN2-I2 CND ZN1-4 VBS-2 ZN2-11 Com-2 ZN1-5 Com-2 ZN2-10 VBS-2 ZN1-6 VBS-1 ZN2-9 Com-1 ZN1 7 Com-1 ZN2-8 VBS-1 ZN1 8 VDD ZN2-7 VHV ZN1-9 CH ZN2-6 LAT ZN1 ID CND ZN2-5 SI2-2 ZN1 11 CL ZN2-4 GND ZNI t? CND - Sll-2 ZN1 M Sll-1 ZN2-2 GND ZN1-14 GND ZN2 1 SI2-1 o CJ O & : TERMINAL . KAME :::{CN3) SIGNAL NAME ZN3 1 Sll-3 ZN3-2 GND ZN3-3 SI2-3 ZN3-4 GND HT ZN3-6 NCH ZN3 7 VDD ZN-i P VBS-4 ZN3 9 Com-4 ZN3-10 VBS-3 ZN3-11 Com-3 ZN3-12 GND ZN3-13 GND Z J 14 GND TERMINAL ••••••NAME:-.::: SIGNAL NAME ZN4 14 GND ZN4-13 SI2-4 ZN4-12 CND ZN4-11 : SIT -4 ZN4-10 GND ZN4-9 XH ::ZN4-:8: GND ZN4-7 Com-4 : 2N4-6; : VBS-4 ZN4-5 Com-3 ZN4-4 VBS-3 ZN4-3 GND ZN4-2 NSA ZN4 1 GND o (57) : A head unit control circuit controls a head unit, and is provided outside the head unit, the head unit including: an ejecting section that includes a piezoelectric element, and can eject a liquid corresponding to displacement of the piezoelectric ele - ment, the piezoelectric element being displaced corresponding to a change in potential of a drive signal when the drive signal has been supplied to the piezoelectric element; a determination circuit that determines whether or not the piezoelectric element has a pre - determined electrical storage capability; and an ejection limit circuit that stops the supply of the drive signal to the piezoelectric ele - ment and limits the ejection of the liquid from the ejecting section when result of the determination is negative, the head unit control circuit including: a first terminal that outputs an instruction signal that instructs the head unit to execute the determination; a second terminal that outputs the drive signal; and a third terminal that is provided between the first terminal and the second terminal, the third terminal being smaller in potential change width than the second terminal when the ejecting section ejects the liquid.