GB1285012A - Digital electronic timepiece - Google Patents
Digital electronic timepieceInfo
- Publication number
- GB1285012A GB1285012A GB21156/71A GB2115671A GB1285012A GB 1285012 A GB1285012 A GB 1285012A GB 21156/71 A GB21156/71 A GB 21156/71A GB 2115671 A GB2115671 A GB 2115671A GB 1285012 A GB1285012 A GB 1285012A
- Authority
- GB
- United Kingdom
- Prior art keywords
- display
- counters
- segments
- display unit
- signals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G9/00—Visual time or date indication means
- G04G9/08—Visual time or date indication means by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques
- G04G9/12—Visual time or date indication means by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques using light valves, e.g. liquid crystals
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G9/00—Visual time or date indication means
- G04G9/08—Visual time or date indication means by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques
- G04G9/10—Visual time or date indication means by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques by controlling light sources, e.g. electroluminescent diodes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Electric Clocks (AREA)
Abstract
1285012 Electronic timepieces DAINI SEIKOSHA KK and HATTORI TOKEITEN KK 19 April 1971 [30 July 1970] 21156/71 Heading G3T An electronic timepiece (e.g. a watch) has digital liquid crystal display and comprises a quartz crystal oscillator 1, Fig. 2, from which a frequency of 1 HZ is derived by a frequency divider 2 (14 flip-flops in cascade) and fed to cascade connected counters 3a to 3f. Counter 3a counts pulses corresponding to a time interval of one second, counter 3b to a time interval of ten seconds and so on. Binary code signals are sent from the counters to respective matrix circuits 4a to 4f which convert the signals to further binary signals corresponding to the number of segments (seven) in each time display unit 6 1 to 6 6 . The further binary signals are applied to the bases of respective transistors e.g. T 1 to T 6 , Fig.5, of selector circuit 5a, Fig.2, whereby to activate selected ones of the segments L 11 to L 17 of the respective display unit 6 1 . To correct the time setting, e.g. in accordance with a radio time signal, a switch S o is closed causing the resetting to zero of all the counters. Switches S 1 to S 6 are then closed to digitally advance the respective counters. Each display unit comprises a glass panel 17 Fig. 6, and back glass 19 with nematic liquid crystal in the space between. A transparent electrode 18 is deposited on the inner surface of 17 and a nickel layer 20 which forms the seven segments is deposited on the inner surface of 19. Spacers 21 are of plastics and the unit is sealed air-tight. Lighting electrodes 13, 14 are connected to the timepiece power source e.g. a battery and serve to distinguish the hour display from the minutes display and the minutes from the seconds display.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6634770 | 1970-07-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1285012A true GB1285012A (en) | 1972-08-09 |
Family
ID=13313219
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB21156/71A Expired GB1285012A (en) | 1970-07-30 | 1971-04-19 | Digital electronic timepiece |
Country Status (2)
Country | Link |
---|---|
US (1) | US3800524A (en) |
GB (1) | GB1285012A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5159667A (en) * | 1974-11-21 | 1976-05-24 | Suwa Seikosha Kk | |
US4213063A (en) * | 1978-04-27 | 1980-07-15 | Jones John L Sr | Room occupancy power programmer |
US4337047A (en) * | 1978-11-29 | 1982-06-29 | Sharp Kabushiki Kaisha | Time counter controlled electronic learning aid |
EP0109160A3 (en) * | 1982-10-14 | 1986-04-09 | The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and | Electronic displays |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3015094A (en) * | 1957-09-06 | 1961-12-26 | Gen Time Corp | Lighted numerical time display clock |
US3505804A (en) * | 1968-04-23 | 1970-04-14 | Rca Corp | Solid state clock |
US3540209A (en) * | 1968-07-31 | 1970-11-17 | Timex Corp | Horological time display |
US3576099A (en) * | 1969-04-22 | 1971-04-27 | Hamilton Watch Co | Solid state timepiece having electro-optical time display |
US3646751A (en) * | 1969-12-05 | 1972-03-07 | Detection Sciences | Digital timing system |
US3664116A (en) * | 1970-04-06 | 1972-05-23 | Gen Electric | Digital clock controlled by voltage level of clock reference signal |
US3672155A (en) * | 1970-05-06 | 1972-06-27 | Hamilton Watch Co | Solid state watch |
-
1971
- 1971-04-19 GB GB21156/71A patent/GB1285012A/en not_active Expired
- 1971-07-27 US US00166384A patent/US3800524A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US3800524A (en) | 1974-04-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PE20 | Patent expired after termination of 20 years |