DE2210943A1 - Timepiece with digital display - Google Patents

Description

PATENT ADVOCATE

VeOOO Munich 60

Floss mannstra Pj e 15 /

Telephone (08 Π] 88 36 03/88 36 04

Kabushiki Kaisha buv / a Seiko sha Tokyo, Japan

Timepiece rait digital display

The invention relates to a timepiece, in particular a wristwatch with digital liquid crystal or solid display.

Since the display area available on a wristwatch is relatively small, it is difficult to display all time information, i.e. the indication of the date, the hour, the minute, the second, the tenths and hundredths of a second in digital format at the same time . Fora: to depict. This makes the display confusing.

The invention is based on the object of simplifying the display. A display device is to be created with which several digits or units of time and duration are representable.

The invention is characterized in that the time measured by a clock mechanism and that measured by the clock mechanism a chronograph measured time optionally on a single

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- 2 uniform display device are shown.

Under time is the one at a specific point in time on a clock readable value and, under duration, the time consumed between a start time and an end time, a time cycle or understood the time required to complete an operation. If a wristwatch has 4 display windows, For example, the digits that indicate the month and the day are shown first, then the digits that indicate the hour and denote the outlines and finally the digits that denote the tenths and hundredths of a second. That way you can all data are presented by a uniform display device.

The invention is explained in more detail by means of an exemplary embodiment with the aid of a figure. The i'igur presents a block diagram of a Timepiece according to the invention.

Mt block 1 is a counter for generating a signal CL from 100 Hz. This signal is derived from a quartz crystal oscillator serving as a time standard. Blocks 2 to 5 represent a group of counters or dividers that form a clock mechanism. Block 2 is a counter through which two Decimal divisors a 0.01-second, a 0.1-second and a 1 second 0p signal is formed. The 0.01 second and 0.1 second signals are encoded in a B. code (1, 2, 4, 8).

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Block j is a counter, by means of which both a 1-second and a 10-second and a 1-line signal 0- is formed by means of a decimal calculator and a divider-by-6, which is converted into a signal Bp is encoded.

Jlock 4 is a counter that uses a decimal divider and a divider-by-6 to generate a 1-minute and a 10-minute signal 0, which is converted into a 3-code . Block 5 is an ⁱ divider-by-2 ^z l · for generating a B. signal of the time segment (day).

The blocks 6 to 9 represent a group of dials or dividers that form the mechanism of a chronograph. They are constructed in the same way as the blocks 2 and 5 and generate output signals A _x , .Ap.A -,. A ^ of a coded signal i / 1> 2, 4, β). The block 10 denotes a selection gate block, through which either the time signal (B _x , IU B- B ^) or the signal for the duration (A,. Ap * A ₇ -A ^) can be selected, depending on whether a selection switch S _x . is on or off. The output of the select gate block is _{labeled C x} , ^ 2'G ^ -C ^. The block 11 represents a resistor circuit consisting of bistable multivibrators, in which the selected signals C _x ., Cp, Q- and C ^ are shifted in parallel by a clock pulse CL and stored. The shift pulse GL comes as signal 0, _Λ from the counter 1 and is supplied via an ITOE gate G.

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When the start switch Sp for the memory is turned on, the shift pulse is turned off and the data to be stored are stored. The block 12 represents a selection gate block through which either the signals CL, C ₇ . (Time segment and minute) or Cp, C. (seconds and 0.1 as well as 0.01 seconds) can be selected, depending on whether a selector switch S-7 is switched on or off. The output signals Dp and D _x . the selected coded signals (1, 4, 2, 8) are converted by a decoder 13 into signals with a representation by seven sections and these are supplied to a display area 14.

With the display device according to the invention, a time measured by a clock mechanism with eight units or Digits and one measured by the mechanism of a chronograph Duration can be represented by only four digits. As a result of the memory, a certain time can be static and exact are displayed.

By using integrated circuits, the circuit which appears complicated can be realized cheaply and in such a size that it fits in a wristwatch. In particular through the use of complementary field effect transistors (C-MOS) the need for electrical energy becomes very small.

3 claims
1 figure

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Claims (3)

Claim " Λ.j timepiece, in particular wristwatch with digital Elüssigivristall- or i'estkörper-display, characterized in that the time measured by a watch mechanism and the duration measured by the mechanism of a chronograph are optionally displayed on a uniform display device. 2. Timepiece according to claim 1, characterized in that the locations or units used the time measured by the watch eniuechani smus and the length of time measured by the mechanism of the chronograph are arbitrary can be displayed separately and optionally on the standard display device. 3. Timepiece according to claim 1, characterized in that that the time measured by the watch mechanism and that measured by the mechanism of the chronograph Period of time stored in an electronic memory, preferably a shift register, and that the stored time or duration can optionally be displayed by a uniform display device. 2 0 9841/1024 Blank page