Invention Grant
- Patent Title: Analog watch
- Patent Title (中): 模拟手表
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Application No.: US11663503Application Date: 2005-09-20
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Publication No.: US07646678B2Publication Date: 2010-01-12
- Inventor: Toshiyuki Imai , Hiroyuki Satou , Masahide Hasegawa , Kazuhisa Tohyama , Keiji Nakagawa , Kentarou Hayashi
- Applicant: Toshiyuki Imai , Hiroyuki Satou , Masahide Hasegawa , Kazuhisa Tohyama , Keiji Nakagawa , Kentarou Hayashi
- Applicant Address: JP Aichi
- Assignee: Ricoh Elemex Corporation
- Current Assignee: Ricoh Elemex Corporation
- Current Assignee Address: JP Aichi
- Agency: Smith, Gambrell & Russell, LLP
- Priority: JP2004-276516 20040924; JP2005-085223 20050324; JP2005-088145 20050325; JP2005-091138 20050328; JP2005-093821 20050329; JP2005-203875 20050713
- International Application: PCT/JP2005/017270 WO 20050920
- International Announcement: WO2006/033317 WO 20060330
- Main IPC: G04C17/00
- IPC: G04C17/00

Abstract:
Provided is a watch capable of performing digital display as well as analog display. The watch can offer digital display without posing disadvantages peculiar to a liquid crystal panel. On the other hand, the watch can reduce the restrictions in design and make the digital display larger and easier to see. The watch includes a light-shielding plate 22 on the rear side of the dial 24. In the light-shielding plate, light-transmitting holes 23 are made piercing from a front of the light-shielding plate to a rear thereof. Thin chip LEDs 17 are inserted in the light-transmitting holes, and mounted on a circuit board 16. The circuit board is placed on the rear side of the light-shielding plate. On the rear side of the circuit board, an analog movement 13 is provided, and an LED drive circuit 33 for driving the LEDs is placed. Thus, the LEDs 17 for digital display are placed on the rear side of the dial. The dial is formed so as to have an optical transmittance such that the digital display with the LEDs can be visually identified through the dial only when the LEDs are ON.
Public/Granted literature
- US20080101161A1 Analog Watch Public/Granted day:2008-05-01
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