公开(公告)号：US20250095677A1

公开(公告)日：2025-03-20

申请号：US18884135

申请日：2024-09-13

Applicant: FUJIFILM CORPORATION

Inventor： Kenji NISHIDA

IPC: G11B5/58 ,  G11B5/02 ,  H04B5/26 ,  H04B5/43 ,  H04B5/79

Abstract: A noncontact communication medium performs communication with an external device in a noncontact manner. The noncontact communication medium includes a resonance circuit, a regulator that generates operating power, a variable resistor, a switcher, and a control circuit. The processing circuit generates a response signal corresponding to a command signal. The switcher switches between an applied state in which a load of the variable resistor is applied to the resonance circuit and a non-applied state in which the load is not applied to the resonance circuit, according to the response signal. The control circuit controls the resistance value according to the bleed power dissipated from the regulator.

公开(公告)号：US20230140361A1

公开(公告)日：2023-05-04

申请号：US18048039

申请日：2022-10-20

Applicant: FUJIFILM CORPORATION

Inventor： Kenji NISHIDA ,  Toru NAKAO

IPC: G06K19/077

Abstract: The noncontact communication medium for a recording medium cartridge includes a substrate, an IC chip that is electrically connected to one end and the other end of an antenna coil formed on the substrate and configured to induce power with application of a magnetic field from an outside, and a stress relaxing member that is provided between the IC chip and the substrate.

公开(公告)号：US20210098020A1

公开(公告)日：2021-04-01

申请号：US17022113

申请日：2020-09-16

Applicant: FUJIFILM CORPORATION

Inventor： Kenji NISHIDA

IPC: G11B23/03 ,  G06K7/10

Abstract: A magnetic tape cartridge includes: a magnetic tape on which data is recorded; and a recording medium other than the magnetic tape, and on which a keyword for searching the data recorded on the magnetic tape is recorded.

公开(公告)号：US20240303459A1

公开(公告)日：2024-09-12

申请号：US18589319

申请日：2024-02-27

Applicant: FUJIFILM CORPORATION

Inventor： Kenji NISHIDA

IPC: G06K19/077 ,  G11B7/24097

CPC classification number: G06K19/07758 ,  G11B7/24097

Abstract: A noncontact communication medium includes a resonance circuit configured to resonate using an induced current induced by the antenna coil to generate an alternating current voltage, and a control circuit. The resonance circuit includes a variable condenser connected in parallel to the antenna coil, and a variable resistor connected in parallel to the antenna coil. The control circuit adjusts capacitance of the variable condenser to cause the resonance circuit to resonate at a predetermined resonance frequency, and adjusts a resistance value of the variable resistor to adjust a Q value. The noncontact communication medium operates using power based on a direct current voltage obtained by rectifying the alternating current voltage. And the communication is communication using a signal corresponding to a waveform of the alternating current voltage.

公开(公告)号：US20240290361A1

公开(公告)日：2024-08-29

申请号：US18443315

申请日：2024-02-16

Applicant: FUJIFILM CORPORATION

Inventor： Kenji NISHIDA

IPC: G11B33/04 ,  H05K5/02

CPC classification number: G11B33/04 ,  H05K5/0217

Abstract: A magnetic tape cartridge includes a noncontact communication medium that is provided in a case and in which a through-hole penetrating a substrate in a plate thickness direction is formed, a member having one end provided in the case, a shaft portion that is capable of positioning the noncontact communication medium in the case by being inserted into the through-hole, and a restriction portion that is provided at the other end of the member and that is configured to restrict displacement of the noncontact communication medium in a direction in which the noncontact communication medium comes off the shaft portion by abutting on the noncontact communication medium.