A display device for the electro-optical display of Indian numerals, wherein a plurality of display-active regions are disposed in patterns and electrically individually operated in combination, with predetermined display active regions of a pattern representing an individual numeral. In one embodiment, each display pattern for each Indian numeral consists of seven display-active regions disposed in the form of a frame which consists of an upper bar and a lower bar which both extend approximately horizontally, and a total of four side bars of approximately equal length, together with a planar display active region situated in the middle of the frame and whose length is approximately equal to its width, the side bars each have an end extending at least approximately in the direction of the planar display-active region. Other embodiments include an Indian numeric display employing as many as ten display-active regions.

A liquid crystal display device comprises a liquid crystal display unit including a numeral display section and a unit display section, a dynamic driving circuit connected to said liquid crystal display unit to dynamically drive said numeral display section and a static driving circuit connected to said liquid crystal display unit to statically drive said unit display section, wherein numeral information and unit information are simultaneously displayed on said liquid crystal display unit and wherein the difference in contrast levels between the dynamically driven section and the statically driven section indicates when the battery needs replacing.

A watch is disclosed having a face with visual hour indicators illuminated by a light emitting diode embedded in a transparent crystal for emitting light to flow outwardly through the crystal to engage a surrounding reflector surface which concentrates the light in the area of the visual hour indicators.

In an electronic watch the indication of the time (hours, minutes and possibly seconds) is given in analog form by means of a first passive electro-optic display cell. The display segments of this first display cell are arranged radially with respect to a central point, and the activated segments thereof have the appearance of the conventional hands of an analog watch. The watch comprises a second passive electro-optic display cell furnishing information in digital form, for example indicating the day of the week and the date. So that only the second cell need be provided with an illuminating device, the watch comprises a selector which is manually operable by means of a push-button which, when it is operated, causes the time to be displayed by the second cell at the same time as the illuminating device thereof is operated. This arrangement enables the user to know the time in the dark without it being necessary to provide the first cell with an illuminating device.

An electronic stop watch includes a time counter circuit starting to count reference clock pulses in response to a starting signal and a digital display arrangement having a predetermined number of display sections to display the time counted or measured by the time counter circuit. A specified count detection circuit is provided to detect that a count of the time counter circuit has reached a specified value which can be displayed by the display sections of the display arrangement. A detection output signal from the detection circuit serves as a display changeover command signal to control count signals which are supplied from the time counter circuit to the display arrangement so that the display arrangement can display time, according to the count of the time counter circuit, in large units of time, for example, in "hours and minutes", instead of small units of time, for example, in "minutes and seconds", after a detection signal has been produced from the detection circuit.