Analog watch
US7646678B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2005 |
| Grant date | Jan 12, 2010 |
| Priority date | — |
| Expiry date | Oct 17, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04G9/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.