GB1528219A – Electronic timepieces
– Google Patents
GB1528219A – Electronic timepieces
– Google Patents
Electronic timepieces
Info
Publication number
GB1528219A
GB1528219A
GB4218276A
GB4218276A
GB1528219A
GB 1528219 A
GB1528219 A
GB 1528219A
GB 4218276 A
GB4218276 A
GB 4218276A
GB 4218276 A
GB4218276 A
GB 4218276A
GB 1528219 A
GB1528219 A
GB 1528219A
Authority
GB
United Kingdom
Prior art keywords
display
pulses
outputs
circuit
segment
Prior art date
1975-10-13
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
Application number
GB4218276A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
Priority date (The priority date 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 date listed.)
1975-10-13
Filing date
1976-10-11
Publication date
1978-10-11
1975-10-13
Priority claimed from JP12300775A
external-priority
patent/JPS5246861A/en
1975-12-19
Priority claimed from JP15166375A
external-priority
patent/JPS5275373A/en
1975-12-19
Priority claimed from JP15166475A
external-priority
patent/JPS5275374A/en
1976-10-11
Application filed by Seiko Instruments Inc
filed
Critical
Seiko Instruments Inc
1978-10-11
Publication of GB1528219A
publication
Critical
patent/GB1528219A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
G04G9/10—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
G04G9/102—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 using multiplexing techniques
Abstract
1528219 Electronic timepieces DAINI SEIKOSHA KK 11 Oct 1976 [13 Oct 1975 19 Dec 1975 (2)] 42182/76 Heading G3T [Also in Division G5] In an electronic timepiece with a digital LED display, the display is continuously energized. However, to minimize power consumption only one display digit is in an activated state at a time; in addition the energization is controlled in dependence upon the number of segments of a 7-segment display device, which require to be energized to produce a given numeral. The energization is controlled by selectively applying drive pulses of appropriate width, duty ratio or waveform to give substantially the same brightness for all numerals. Persistence of vision gives the effect of continuous illumination. In Fig. 4, an electronic scanning switch circuit 44 couples the BCD coded outputs of secs, mins, hours counter circuits 33 to a de-coder/driver 66, in synchronism with pulse signals corresponding to selected numerals from a numeral selecting signal generating circuit 55 (e.g. a ring counter). The de-coder 66 has seven outputs each corresponding to a respective segment of a 7-segment numeric display 88. The outputs of the numeral selecting circuit 55 are also applied to the display via a signal changing circuit 77 which determines the drive pulse width or duty-cycle or waveform (e.g. a plurality of higher f pulses may be supplied instead of a single lower f pulse having a duration equal to the aggregate period of the plurality of pulses).
GB4218276A
1975-10-13
1976-10-11
Electronic timepieces
Expired
GB1528219A
(en)
Applications Claiming Priority (3)
Application Number
Priority Date
Filing Date
Title
JP12300775A
JPS5246861A
(en)
1975-10-13
1975-10-13
Electronic clock
JP15166375A
JPS5275373A
(en)
1975-12-19
1975-12-19
Electronic watch
JP15166475A
JPS5275374A
(en)
1975-12-19
1975-12-19
Electronic watch
Publications (1)
Publication Number
Publication Date
GB1528219A
true
GB1528219A
(en)
1978-10-11
Family
ID=27314599
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB4218276A
Expired
GB1528219A
(en)
1975-10-13
1976-10-11
Electronic timepieces
Country Status (7)
Country
Link
BR
(1)
BR7606831A
(en)
CA
(1)
CA1072746A
(en)
DE
(1)
DE2646221A1
(en)
FR
(1)
FR2328231A1
(en)
GB
(1)
GB1528219A
(en)
HK
(1)
HK88879A
(en)
IT
(1)
IT1073916B
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2208026A
(en)
*
1987-08-10
1989-02-15
Bollmann Limited H
Display devices
Families Citing this family (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CN105759590B
(en)
*
2014-12-17
2019-02-05
天津海鸥表业集团有限公司
Dynamic image display mechanism in watch
Family Cites Families (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2105003B3
(en)
*
1970-09-15
1973-06-08
Lip Horlogerie
US3765163A
(en)
*
1972-03-17
1973-10-16
Uranus Electronics
Electronic timepiece
1976
1976-10-11
GB
GB4218276A
patent/GB1528219A/en
not_active
Expired
1976-10-12
FR
FR7630612A
patent/FR2328231A1/en
active
Granted
1976-10-12
BR
BR7606831A
patent/BR7606831A/en
unknown
1976-10-12
IT
IT5169076A
patent/IT1073916B/en
active
1976-10-12
CA
CA263,111A
patent/CA1072746A/en
not_active
Expired
1976-10-13
DE
DE19762646221
patent/DE2646221A1/en
not_active
Ceased
1979
1979-12-27
HK
HK88879A
patent/HK88879A/en
unknown
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2208026A
(en)
*
1987-08-10
1989-02-15
Bollmann Limited H
Display devices
Also Published As
Publication number
Publication date
IT1073916B
(en)
1985-04-17
CA1072746A
(en)
1980-03-04
BR7606831A
(en)
1977-08-30
HK88879A
(en)
1980-01-04
DE2646221A1
(en)
1977-04-21
FR2328231B1
(en)
1981-07-03
FR2328231A1
(en)
1977-05-13
Similar Documents
Publication
Publication Date
Title
GB1514857A
(en)
1978-06-21
Digital electronic timepiece
US3959963A
(en)
1976-06-01
Solid-state display for time-piece
JPS5814998B2
(en)
1983-03-23
electronic clock
JPS5643575A
(en)
1981-04-22
Electronic clock
US4121415A
(en)
1978-10-24
Hybrid horological display using time modulation
GB2052111A
(en)
1981-01-21
Electronic timer
JPS591993B2
(en)
1984-01-14
Electronic clock time display adjustment device
GB1355161A
(en)
1974-06-05
Electronic timepieces
US3980868A
(en)
1976-09-14
Digital yacht racing timing system
GB1412165A
(en)
1975-10-29
Chronograph
US3845615A
(en)
1974-11-05
Multiplexed liquid crystal display
GB1509507A
(en)
1978-05-04
Electronic timepieces
US4022017A
(en)
1977-05-10
Full electronic car clock with digital display and method of time setting therefor
GB1528219A
(en)
1978-10-11
Electronic timepieces
US4081953A
(en)
1978-04-04
Hybrid horological display using space modulation
US4257045A
(en)
1981-03-17
RMS voltage control with variable duty cycle for matching different liquid crystal display materials
US4597674A
(en)
1986-07-01
Multiplex digital clock
US3894389A
(en)
1975-07-15
Electronic watch
GB1485864A
(en)
1977-09-14
Electronic timepieces
US4196582A
(en)
1980-04-08
Control device for an electronic watch
US4106281A
(en)
1978-08-15
Time displays for electronic time keeping devices
GB2062302A
(en)
1981-05-20
Electronic timepieces
FR2406272A1
(en)
1979-05-11
Multiplex operation circuit for LED display units – uses pauses between individual signal elements to perform signal changes
GB1534330A
(en)
1978-11-29
Electronic timepieces with digital displays
GB1483698A
(en)
1977-08-24
Electronic watch
Legal Events
Date
Code
Title
Description
1979-01-31
PS
Patent sealed
1993-06-09
PCNP
Patent ceased through non-payment of renewal fee
Effective date:
19921011
