GB1466624A - Electronic watch - Google Patents
Electronic watchInfo
- Publication number
- GB1466624A GB1466624A GB2247074A GB2247074A GB1466624A GB 1466624 A GB1466624 A GB 1466624A GB 2247074 A GB2247074 A GB 2247074A GB 2247074 A GB2247074 A GB 2247074A GB 1466624 A GB1466624 A GB 1466624A
- Authority
- GB
- United Kingdom
- Prior art keywords
- display
- coder
- minutes
- driver
- counters
- 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
- G04G9/126—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 provided with means for displaying at will a time indication or a date or a part thereof
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B19/00—Indicating the time by visual means
- G04B19/24—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C17/00—Indicating the time optically by electric means
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G9/00—Visual time or date indication means
- G04G9/0023—Visual time or date indication means by light valves in general
- G04G9/0029—Details
- G04G9/0047—Details electrical, e.g. selection or application of the operating voltage
- G04G9/0052—Details electrical, e.g. selection or application of the operating voltage using means to adjust the display in accordance with the ambient light, e.g. switching or controlling a supplementary light source
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Electric Clocks (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
1466624 Electronic timepieces HUGHES AIRCRAFT CO 20 May 1974 [29 May 1973] 22470/74 Heading G3T An electronic watch Fig. 2, is arranged to continuously display hours and minutes on a liquid crystal digital display device e.g. liquid crystal or light emitting diodes, and to replace the hours and minutes display by the date or seconds display on the same display devices, upon demand. A.M. and P.M. are displayed by illuminated colon dots, and a light-emitting diode 27, Fig. 1, is provided to illuminate the display if liquid crystal type. Transmission gates 80, 82, 84, 86, 88, 90, 92 connect the outputs of the various seconds, minutes, hours and days BCD counters to input 74 of a de-coder 72 and are controlled by a multiplex driver 94, Other transmission gates (not shown) connect the counters to input lines 76, 78, 79 of the de-coder. A multi-plexing arrangement is used to restrict the number of de-coders required, the inputs and outputs of the de-coder 72 being multi-plexed. Normally, the driver 94 operates the transmission gates such that the lines 74, 76, 78, 79 receive the BCD digital code bit when for example the unit minutes counter 58 is connected thereto by the ON condition of transmission gates 84 etc. The de-coder 72 output commands the energization of the necessary lines for operation of the 7-bar segment display in the unit minutes display device 28. A demulti-plexer 98 receives the de-coder commands also digit select information from the multi-plex driver 94 which controls it so that the command information from the de-coder is properly distributed to respective memory driver devices 100, 102, 104 which continuously energize selected segments of the 7-bar segment display devices. To display seconds instead of minutes and hours, a push-button 40 is depressed and causes the multiplex driver 94 to turn ON transmission gates 80, 82 whereby the content of the seconds counters are displayed. Likewise, upon depression of a pushbutton 42 the driver 94 causes gates 90, 92 to pass the content of the days counters 66, 68 to the display devices 28, 30. A push-button 44 is used in conjunction with 40, 42 for setting the counters to give the correct time. The demulti-plexer is a switching device and in order that continuous power may be fed to each selected display segment, the memory drivers are provided. Reference has been directed by the Comptroller to Specification 1391396.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US36479473A | 1973-05-29 | 1973-05-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1466624A true GB1466624A (en) | 1977-03-09 |
Family
ID=23436105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2247074A Expired GB1466624A (en) | 1973-05-29 | 1974-05-20 | Electronic watch |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5022669A (en) |
| FR (1) | FR2231996B1 (en) |
| GB (1) | GB1466624A (en) |
| HK (1) | HK52377A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5824754B2 (en) * | 1975-05-23 | 1983-05-23 | セイコーインスツルメンツ株式会社 | Gozen |
| JPS5247770A (en) * | 1975-10-14 | 1977-04-15 | Seiko Instr & Electronics Ltd | Electronic watch |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3823551A (en) * | 1971-05-03 | 1974-07-16 | Riehl Electronics Corp | Solid state electronic timepiece |
-
1974
- 1974-05-20 GB GB2247074A patent/GB1466624A/en not_active Expired
- 1974-05-28 FR FR7418482A patent/FR2231996B1/fr not_active Expired
- 1974-05-29 JP JP5982874A patent/JPS5022669A/ja active Pending
-
1977
- 1977-10-13 HK HK52377A patent/HK52377A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR2231996B1 (en) | 1978-01-20 |
| FR2231996A1 (en) | 1974-12-27 |
| HK52377A (en) | 1977-10-20 |
| JPS5022669A (en) | 1975-03-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |