GB2084764A - Combination analog/digital timepieces - Google Patents
Combination analog/digital timepieces Download PDFInfo
- Publication number
- GB2084764A GB2084764A GB8126839A GB8126839A GB2084764A GB 2084764 A GB2084764 A GB 2084764A GB 8126839 A GB8126839 A GB 8126839A GB 8126839 A GB8126839 A GB 8126839A GB 2084764 A GB2084764 A GB 2084764A
- Authority
- GB
- United Kingdom
- Prior art keywords
- display
- timepiece
- analog
- hands
- electrooptical
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C17/00—Indicating the time optically by electric means
- G04C17/0091—Combined electro-optical and electro-mechanical displays
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G9/00—Visual time or date indication means
- G04G9/0082—Visual time or date indication means by building-up characters using a combination of indicating elements and by selecting desired characters out of a number of characters or by selecting indicating elements the positions of which represents the time, i.e. combinations of G04G9/02 and G04G9/08
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
- Electric Clocks (AREA)
Abstract
The combination timepiece comprises an electro-optical digital display 10 disposed in the timepiece case 18 behind analog time indicator hands 16, 17 to provide a visible face over which the hands continuously sweep. The electro-optical display 10 includes a central aperture through which the spindles supporting the hands 16, 17 extend from the timepiece gear train and further includes selectively actuable indicia 11 for displaying extra time-related information in digital form on the timepiece face in conjunction with the analog time information provided by the hands. The digital display and a stepping motor driving the hands preferably both receive timekeeping signals from a common integrated circuit 51 mounted in a module assembly in the timepiece case. The module assembly includes a front and rear frame members 32, 30 with a printed circuit board 50 carrying the integrated circuit 51 held therebetween. The stepping motor 34 and gear train of the timepiece are also supported between the frame members and the circuit board 50 includes a centre hole to allow the hands spindles to extend therethrough. The front frame 32 carries the electro-optical display 10 and preferably also an annular dial ring 14 bearing time markers 15 around the periphery of the display to cooperate with the analog hands 16, 17 and in conjunction with the display to provide an aesthetically pleasing timepiece face. The time markers may alternatively be provided as parts of the electro-optical display, which also includes a set of alarm time indicators 13. <IMAGE>
Description
SPECIFICATION
Combination analog/digital timepieces
This invention relates to a so-called combination or
"combo" electronic timepiece in which time is
displayed in analog fashion by means of the usual
rotating time indicator hands and additional infor
mation, which usually includes further time data, is
displayed in digital fashion by means of an elec
trooptical display.
The combo timepiece has been developed to
satisfy the need and consumer demand for a time
piece having multiple functions such as a chrono
graph, alarm and timer. Watches of the combo type
typically employ a miniature electric motor, such as
a stepping motor, along with a gear train to drive the
analog time indicator hands such as an hour hand
and minute hand. The electrooptical display can be
one of a variety of well known types such as a liquid
crystal display or light emitting diode. Timekeeping
signals are provided to the stepping motor and to
the electrooptical display by an integrated circuit, for
example, as shown in US-PS 3,911,665 and US-PS 3,945,191.
As shown in Figures 1 and 2, of the accompanying
drawings, combo watches available commercially
today employ a dial or face plate 2 having a
rectangular cut-out or window 3 through which the
electrooptical display can be viewed. In one watch
style, Figure 1, the electrnoptical display and associ
ated window are located within the pattern of analog
time markers 5 while in another style, Figure 2, the
analog and digital displays occupy separate and
distinct areas of the timepiece face. However, the
overall aesthetic impression ofthesewatches is not
entirely satisfactory in that either the analog portion
or the digital portion of the timepiece face is over
emphasized, resulting in a degradation in the
appearance value of the product.
A recent effort to improve the appearance of the
combo watch is illustrated in UK-PS 2023887 A and
this eliminates the cut-out or window in the dial plate of the combo watch by employing a semi
transparent dial plate through which a light emitting
diode display can be seen, when activated.
The present invention seeks to provide a combo
electronic timepiece with improved aesthetic and
functional features, and a module assembly for use
in such a timepiece.
Briefly, in a timepiece according to the present
invention, the electrooptical display is disposed in
the timepiece case behind the analog time indicator
hands to provide a visible timepiece face over which
the analog hands continuously sweep as they are
rotated on a central spindle driven by the timepiece
gear train and motor. The electrooptical display
includes a central aperture through which the central
spindle supporting the analog hands extends from
the timepiece gear train, through the display and
above the portion of the display providing the
timepiece face. Disposed on the timepiece face
portion of electrooptical display are selectively actu
able indicia such as a pattern of transparent elec
trode segments forming digits and/or circumferentially spaced markers to display additional information as desired.The electrooptical display and electric motor driving the analog hands preferably receive timekeeping signals from an integrated circuit housed in a module assembly in the timepiece case. The timepiece has the capability to appear as a high style, jewellery-type analog timepiece simply by the wearer deactivating the electrooptical display, while still retaining the capability of calling up and displaying information electrooptically upon reactivation.
In one embodiment of the invention, an annulus bearing time markers may be placed over the periphery of the electrooptical display to cooperate with the display to form the timepiece face and to cooperate with the analog hands to complete the analog display. In another embodiment, the electrooptical display itself may inclue time markers to cooperate with the analog hands.
The module assembly of the invention includes front and rear frame members supporting the driving motor and associated gear train therebetween with the front frame member housing the electrooptical display such that the central spindle of the gear train extends through the central aperture of the display. A substrate board with an integrated circuit for providing signals to the driving motor and electrooptical display is held between the front and rear frame members, the substrate board including an aperture axially aligned with the central aperture through the electrooptical display for accommodat ins the central spindle.Preferably, an annular holder member is snap-fitted onto the front frame member overlying the periphery of the electrooptical display and an annular dial ring bearing time markers is attached to this holder member in similar overlying relation to the display. The completed module assembly can be simply inserted into a more or less conventional timepiece case having a transparent crystal overlying the timepiece face (formed by the electrooptical display and dial ring) so that the analog hands sweeping over the timepiece face as well as the digital display can be observed.
The invention will now be further described with reference to the accompanying drawings in which:
Figure 1 is a plan view of a prior art combo watch,
Figure 2 is a plan view of another prior art combo watch,
Figure 3 is a plan view of one embodiment of a combo watch according to the invention,
Figure 4 is a plan view of another embodiment of a combo watch according to the invention,
Figure 5 is a cross-sectional partial side view of a module assembly showing the timepiece gear train,
Figure 6 is an exploded view of the module assembly for a combo timepiece similar to that shown in Figure 4,
Figure 7 is another cross-sectional view of the module assembly, and
Figure 8 is a plan view of an electrooptical display.
Exemplary combo watches of the invention, one with a circularface and the other with a rectangular face, are shown in Figures 3 and 4. Of course, these are offered for purposes of illustration, rather than limitation, since other shapes, styles and designs are also usable in the present invention. The invention is applicable not only to wristwatches but also pocket watches, pendant watches as well as clocks and othertimepieces.
The circular face of the watch of Figure 3 is comprised of a centrally disposed electrooptical display 10 including selectively actuable digits 11 with a colon 1 1a and an alarm marker 13 and a peripherally disposed annular dial ring 14 bearing time markers 15 which cooperate with time indicator hands, such as hour hand 16 and minute hand 17, to display time in analog form. The electrooptical display 10 and annulus 14 are housed in a case 18 beneath a crystal 19 which is held to the case by a bezel portion 20 in conventional fashion, Figure 5. Of course, bezel portion 20 can be a separate component or formed integrally with the case. In the embodiment shown in Figure 3, it is apparent that the bezel 20 also bears markers 21 aligned with time markers 15 on the annulus for aesthetic purposes.A module assembly 22 (shown in Figure 6) supports the electrooptical display 10, annulus 14, analog hands 16 and 17 and a watch movement including gear train and driving motor as will be described in more detail hereinbelow. A crown 23 is linked to the watch movement in usual manner for setting the analog hands in desired position, and a push button 24 can be provided to actuate the display 10 and select the particular display function desired.
Figure 4 illustrates another embodiment of the invention having a generally rectangular watch face with otherwise similar components as those shown in Figure 3. In Figure 4, like features are designated by like reference numerals primed.
A typical module assembly for use in the invention is shown in Figure 6 as including a rear frame member 30 made of plastics or other suitable material and a front frame member 32. The rear frame member includes an aperture 30a for receiving a battery 33 that provides the watch with power and a plurality of holes 30b to receive studs supporting components of the gear train. A stepping motor 34 of known constructions, e.g., see US-PS 4,079,279 includes a coil 34a, a core member 34b, an upper stator 34c and a lower stator 34d and a rotor assembly 34e which is rotatably disposed between the stators and includes a magnetized disc 34ea and a pinion 34eb mounted on the bottom end ofthe shaft 34ec. The upper end of the rotor shaft 34ec pivots in a recess in the front frame member 32 while the lower end pivots in a recess 30c in the rear frame member 30.
As shown most clearly in Figure 5, the pinion 34eb of the rotor shaft drives an intermediate assembly having an intermediate toothed wheel 36a and an intermediate pinion 36b mounted on stud 36c. In turn, intermediate pinion 36b drives an idler wheel assembly comprising a toothed idler wheel 38a mounted on a stud 38c. Idler wheel 38a then drives a cannon pinion assembly by meshing with a pinion 40a mounted on a tube 40b to which the minute hand 17 is attached. Tube 40b includes another pinion 40c which meshes with a toothed minute wheel 42a for rotation about a stud 42c. A pinion 42b supported on stud 42c in turn meshes with and drives a toothed hour wheel 44a formed on a tube 44b. It is apparent that tube 40b is supported on and rotates about a central spindle 46 and tube 44a is supported on and rotates independently about tube 40b.Centre spindle 46 as well as studs 36c, 38c and 42c are received in the holes 30b in the rear frame 30.
A printed circuit board 50 carries integrated electronic circuitry, e.g., an integrated circuit chip 51 and spaced contact pads 52 connected together by various conductors (not shown) for supplying timekeeping and possibly other signals to the electrooptical display 10 and stepping motor 34. The printed circuit board is positioned between the rear frame member 30 and front frame member 32 and includes a first side recess 50a for accommodating button cell 33, a central aperture 50b for receiving tubes 40b, 44b and centre spindle 46 and a second side recess 50c for accommodating the stepping motor 34, particularly upper and lower stators 34c and 34d and rotor assembly 34e. As shown in
Figures 5 and 7, an annular washer 45 is disposed between the printed circuit board 50 and the rotating toothed hour wheel 44a.Although not shown, the printed circuit board is also supported above the rear frame member 32 by suitable support legs either depending from the board or extending upwardly from the rear frame.
Front frame member 32 is positioned over the printed circuit board 50 and is fastened to the rear frame member 30 by corner screws 53. The front frame member is typically moulded plastics and includes a generally rectangular aperture 32a extending from the front side to the rear side with the aperture being configured to receive electrooptical display 10 and elastomeric conductive connectors 54. The display rests upon corner support pads 32b moulded onto the front frame and the connectors are positioned in the longitudinal channels 32c and 32d defined between the corner support pads and contact the spaced contact pads 52 on printed circuit board 50 and similarly spaced contact pads 10d on the front display substrate 1 Oa, i.e., on the bottom surface 1 Oaa of the front substrate, Figure 8.The integrated circuit on the printed circuit board is thereby connected electrically to the electrooptical display 10.
The front frame member further includes a moulded recess 32e on the rear side (Figure 7) to accommodate battery 33 as well as other recesses and chambers to accommodate the stepping motor and gear train, such as recess 32f which receives the A shaft 34ec of the rotor assembly, recess 329 which receives the upper stator 34c and rotor disc 34ea and recess 32h which receives the coil 34a of the stepping motor, also shown in Figure 7.
The electrooptical display 10 shown in the Figures is a liquid crystal display, e.g., a twisted nematic, field effect type, having a front transparent substrate 10a such as a glass plate and a rear substrate 10b spaced apart by, for example, 10 microns with liquid crystal material in the space. The substrates 10a and 10b are sealed around their peripheries by epoxy 10c or other known sealants, Figure 8.The front glass substrate includes a transparent electrode segment pattern thereon forming digits 11 and colon 11 a with the electrode segments terminating along opposite longitudinal sides of plate 10a on the bottom of overhanging portions iOaa in spaced contactterminals 10d. Furthermore, circumferentially spaced markers 1 Oe are provided and selectively actuated to give an alarm indicator display; i.e., to disignate the particular time at which the watch alarm, if present, is set to activate. The smaller rear glass plate 1 0b includes a common electrode (not shown) as is usual in the art.
Feature of the display is the provision of a centre aperture 1 Of through which centre spindle 46, minuts tube 40b and hour tube 44b extend, as shown in
Figures 5 and 7. This aperture may be formed by laser drilling, or by other well known techniques. Of course, sealant 10c is piaced between the glass plates 10a and 1 0b around the circumference of the aperture. The aperture 1 Of can be formed either before the glass plates 10a and lOb are bonded together around their outer periphery or afterwards.
It will be apparent to those skilled in the art that further characters or indicia may be provided on the front glass plate 1 ova, for example, a product legend such as "QUARTZ" or a trade name or trademark could be electrooptically displayed in lieu of being painted or otherwise applied to the front glass plate and circumferentially-spaced time markers could be electrooptically displayed instead of being provided on annular dial ring 14 or painted on the display.
And, of course, an electrooptical display having a circular outline ratherthan a rectangular outline could also be used and in some situations would be preferred to save space. Other types of electrooptical displays are also usable in the invention, e.g., electrochromic and electrolytic displays as well as light-emitting diode displays and others.
Electrooptical displays with transparent display electrode segments, e.g., indium oxide electrodes, are preferred in certain embodiments of the invention where a high fashion, jewellery analog timepiece appearance is desired, at least part of the time.
By making the display electrode segments transparent, the display can provide a uniform, homogeneous timepiece face behind the hour and minute hands simply by deactivating the electrode segments and yet additional information can be called up and displayed at will by selectively activating the electrode segments (through pushbutton 24 and the integrated circuit).
Since a twisted nematic, field effect liquid crystal display is illustrated, a front polarizer sheet 31 and rear polarizer/reflector sandwich 12 are employed in conjunction with the display, these components being well known in the art. It is apparent, however, that each of these components must include a centre aperture 31a and 12a, respectively, axially aligned with aperture 1 Of of the display to accommodate the spindle 46 and tubes 40b and 44b.
For aesthetic purposes, it may be desirable and preferred to match the colour of the display 10 with the colour of the case 18, e.g., a gold coloured display with a gold tone or gold plated case or a silver coloured display with a silver tone or chrome coloured case. Of course, non-matching colour combinations are also possible. Coloured polarizers are commercially available for this purpose; i.e., front polarizer sheet 31 could be gold, silver or otherwise coloured as the case may be. Or, the electrooptical display itself may have the desired colour, e.g., a guest-host display with an appropriately coloured guest-dye mixed with the host liquid crystal material to produce the desired coloured appearance.
A holder member 13 having a generally flat front plate 13a with a central aperture 13b is snap-fitted onto the front frame 32. To this end, the holder member includes depending legs 1 3c which are engaged in snap-fit relation in notches 32i moulded into the front frame, FigureS. The holder member further includes slots 13d adjacent each depending leg 13c.
Annular dial ring 14 includes front surface 14a bearing time-markers 14b and also depending legs 14cwhich are bent into slots 13d around the rear side of the holder member 13 to secure it thereto.
Annulus 14 also includes a central aperture 14d which, in conjunction with holder member aperture 13b, provides a window for viewing the electrooptical display 10 through crystal 19 of the watch case.
This completes the module assembly with the exception of screws 53 which pass through corner holes 30e in the rear frame 30 and are threadablyreceived in corresponding holes (not shown) in front frame 32.
It is apparent from Figures 3 and 4 that annulus 14 and electrooptical display 10 together provide a timepiece face of pleasing appearance and significant utility.
Claims (16)
1. An electronic timepiece comprising analog timekeeping means including a motor and gear train driving an analog hour hand and minute hand on a central spindle, integrated circuit means, a case in which said analog timekeeping means and integrated circuit means are disposed, and an electrooptical display disposed in the case behind the analog hands to provide a visible timepiece face over which the analog hands continuously sweep and defining an aperture through which the central spindle carrying said analog hands extends to the gear train, said display having selectively actuable indicia connected to and actuated by said integrated circuit means to display other information on said timepiece face, when desired, in addition to the analog time information provided by said analog hour hand and minute hand.
2. Atimepiece according to Claim 1 further comprising an annulus bearing time markers, the annulus overlying the periphery of the display such that the display and annulus together form the timepiece face.
3. Atimepiece according to Claim 1 wherein the selectively actuable indicia of the display are digits to display other time-related information.
4. Atimepiece according to Claim 3 wherein the display further includes selectively actuable, circumferentially spaced markers to provide an alarm time indicator display.
5. Atimepiece according to Claim 3 wherein the display further includes circumferentially spaced markers to provide time markers electrooptically for cooperating with the analog hands to display time in analog fashion.
6. A timepiece according to Claim 1 wherein the integrated circuit means also actuates the motor driving the gear train and analog hands.
7. Atimepiece according to Claim 1 wherein the selectively actuable indicia of the electrooptical display are in the form of transparent electrode segments so that the display can provide a uniform, homogeneous timepiece face when the electrode segments are unactivated, the timepiece thereby having the overall appearance of an analog timepiece as long as the electrode segments remain unactivated.
8. Atimepiece according to Claim 1 wherein the electrooptical display provides a timepiece face having a colour generally matching the overall colour of the timepiece case.
9. A timepiece according to Claim 2 wherein the electrooptical display provides a timepiece face having a colour generally matching the overall colour of the annulus bearing time markers overlying the periphery of the display.
10. A timepiece according to Claim 8 or Claim 9 wherein the display is a twisted nematic, field effect liquid crystal display with a front and a rear polarizer sheet on opposite sides, the front polarizer sheet being coloured.
11. A timepiece according to Claim 1 wherein the display is circular in outline.
12. A module assembly for an electronic timepiece in which time information is displayed in analog fashion by a rotating hour hand and minute hand and other time information is displayed in digital fashion by an electrooptical display, comprising:
a. a front frame member having a central opening therethrough,
b. an electrooptical display suported in said opening in the front frame member and visible through said opening, said display having selectively actuable indicia for displaying other time information and having a central aperture therethrough,
c. a rear frame member positioned behind the front frame member and display and fastened to the front frame member,
d. an electric motor and geartrain supported between the front and rear frame members behind the electrooptical display, said gear train including a central spindle and an hour hand support shaft and minute hand support shaft independently and rotatably mounted on the central spindle, said support shafts extending through the central aperture of the display and through the central opening of the front frame member, such that the hour hand and minute hand are supported for continuous rotation in front of the electrooptical display,
e. a printed circuit board supported between the front and rear frame members, said board carrying integrated circuit means for providing timekeeping signals to the motor and display and having a central hole through which the hour hand and minute hand support shafts pass, and
f. meansfor electrically connecting the integrated circuit means to the motor and display.
13. A module assembly according to Claim 12 wherein a holder member is releasably fastened to the front frame and an annulus bearing time markers is fastened to the holder member, said holder member and annulus each having central windows in alignment for viewing the display.
14. A module assembly according to Claim 12 wherein a polarizer sheet is positioned on at least one side of the display and the sheet includes an aperture through which the hour hand and minute hand support shafts pass.
15. A timepiece substantially as hereinbefore described with reference to Figures 3 to 8 of the accompanying drawings.
16. Amoduleassemblyforan electronictimepiece substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US18925180A | 1980-09-22 | 1980-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2084764A true GB2084764A (en) | 1982-04-15 |
Family
ID=22696581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8126839A Withdrawn GB2084764A (en) | 1980-09-22 | 1981-09-04 | Combination analog/digital timepieces |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS5786074A (en) |
| FR (1) | FR2490840B3 (en) |
| GB (1) | GB2084764A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2225879A (en) * | 1988-12-12 | 1990-06-13 | Lam Philip Y T | A timepieece dial assembly and timepiece |
| EP0539333A2 (en) * | 1991-10-23 | 1993-04-28 | Fabrique D'ebauches De Sonceboz S.A. | Liquid crystal matrix display used in a watch |
| DE19680975B4 (en) * | 1995-10-17 | 2008-01-10 | Citizen Holdings Co., Ltd., Nishitokyo | Combination display watch with EL lighting |
| EP1455250B1 (en) * | 2003-03-06 | 2013-08-07 | Casio Computer Co., Ltd. | Electronic timepiece apparatus |
| GB2544897A (en) * | 2015-11-30 | 2017-05-31 | Lg Display Co Ltd | Display device having hole |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5751074B2 (en) * | 1973-07-13 | 1982-10-30 | ||
| US4070519A (en) * | 1976-04-27 | 1978-01-24 | Huyck Corporation | High temperature filter fabrics |
| JPS5327396A (en) * | 1976-08-27 | 1978-03-14 | Citizen Watch Co Ltd | Liquid crystal display cell |
| JPS5342770A (en) * | 1976-09-29 | 1978-04-18 | Seiko Instr & Electronics Ltd | Alarm electronic watch |
| JPS5515063A (en) * | 1978-07-19 | 1980-02-01 | Casio Comput Co Ltd | Electronic watch |
| JPS5572886A (en) * | 1978-11-28 | 1980-06-02 | Seiko Epson Corp | Composite display electronic watch |
| JPS5596481A (en) * | 1979-01-17 | 1980-07-22 | Citizen Watch Co Ltd | Compound indication for wrist watch |
-
1981
- 1981-09-04 GB GB8126839A patent/GB2084764A/en not_active Withdrawn
- 1981-09-22 FR FR8117850A patent/FR2490840B3/fr not_active Expired
- 1981-09-22 JP JP56150484A patent/JPS5786074A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2225879A (en) * | 1988-12-12 | 1990-06-13 | Lam Philip Y T | A timepieece dial assembly and timepiece |
| EP0539333A2 (en) * | 1991-10-23 | 1993-04-28 | Fabrique D'ebauches De Sonceboz S.A. | Liquid crystal matrix display used in a watch |
| EP0539333A3 (en) * | 1991-10-23 | 1993-09-08 | Fabrique D'ebauches De Sonceboz S.A. | Liquid crystal matrix display used in a watch |
| DE19680975B4 (en) * | 1995-10-17 | 2008-01-10 | Citizen Holdings Co., Ltd., Nishitokyo | Combination display watch with EL lighting |
| EP1455250B1 (en) * | 2003-03-06 | 2013-08-07 | Casio Computer Co., Ltd. | Electronic timepiece apparatus |
| GB2544897A (en) * | 2015-11-30 | 2017-05-31 | Lg Display Co Ltd | Display device having hole |
| US10288919B2 (en) | 2015-11-30 | 2019-05-14 | Lg Display Co., Ltd. | Irregular shape display device having hole |
| GB2544897B (en) * | 2015-11-30 | 2020-05-27 | Lg Display Co Ltd | Display device having hole |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2490840B3 (en) | 1983-07-29 |
| FR2490840A1 (en) | 1982-03-26 |
| JPS5786074A (en) | 1982-05-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |