A fully electronic chronometer using a quartz crystal as a frequency standard and displaying mean time by the use of electronically operated digital read-outs. The circuit permits the display of the instant of time at which a switch is operated, while mean time continues to be counted by the circuitry. Other features include conservation of power by display of mean time only upon demand and the provision for control and display remote from the timing circuitry.
An electronic timepiece comprises an oscillator, a frequency divider for frequency dividing the output signal of the oscillator to generate 100 Hz output pulse signals, time count circuits having a plurality of counters cascade-connected to count the output pulse signals of the frequency divider, a decoder circuit for decoding the output signal of the time count circuits to generate a display signal and a display device for displaying data corresponding to the output display signal of the decoder circuit, in which a stopwatch display mode and a normal time display mode may be selected by the operation of a switch. The electronic timepiece further includes a control circuit connected between the decoder circuit and display device and adapted to inhibit normal time display data from being supplied to the display device in response to the operation of the switch which sets the electronic timepiece into the stopwatch display mode.
An electronic timepiece comprises a first time counting circuit including a time counter and adapted to count reference clock signals of an oscillator as time data at all times, and a time interval counting circuit provided independently of the time counting circuit and adapted to perform the function of a stopwatch based on a time count start instruction and time count stop instruction. The timepiece further includes a control circuit in which a minute/hour data and a date data are selectively displayed by the operation of a first switch on a digital type indicator and when the timepiece functions as a stopwatch a time interval data is displayed by the operation of a second switch on the indicator based on the time count start instruction and time count stop instruction. The control circuit has additional functions that, while the timepiece functions as a stopwatch, a normal minute/hour data from the time counting circuit can be switched by the operation of the first switch to a minute/hour time interval data (stopwatch) for display on the indicator and after display of the minute/hour time interval data a time interval data corresponding to a second or less can be displayed by the operation of the first switch on the indicator.
Information setting apparatus for a camera comprises pulse generating circuitry, pulse counting circuitry and apparatus for visually displaying variable digital information represented by the pulse count in the pulse counting circuitry. The digital information displayed is changed by altering the pulse count stored in the counting circuitry. A manually operable switch stops the pulse input to the counting circuitry to fix the digital information displayed by the display apparatus in accordance with the desired setting. Apparatus is provided for projecting an image of the displayed information onto the camera film. In cameras provided with a viewfinder, the image of the displayed information is projected into the viewfinder field of view.
Device for selecting values of data elements forming part of a group of data elements includes an operation circuit, a display unit and first register for registering and delivering values of data elements to the display unit. The operating circuit, depending upon the time such circuit is activated, causes the selection of a value of a data element. A second register is provided for registering and delivering to the first register and to the display unit indication information controlling which one of the data elements out of the group of data elements is to be selected. A third register is also included to alter the indication information on a repeated activation of the operation circuit so that subsequent data elements out of the group of data elements are prepared for value selection. Other embodiments of the device includes a plurality of separate operation circuits, of separate operation circuits, an erase feature and implementation with a programmable digital signal processor.
Under the present invention a real time clock circuit, within a set-top box, is provided with an internal clock generator for generating multiple clock signals. Once generated, a first clock signal is divided into an initial set of values representing time and optionally day/date intervals, and then communicated to a set of clock registers. The initial set of values can then be communicated (directly or via a set of DCR registers) to a display component within the set-top box. Updated clock signals are received by the set of DCR registers from an external source such as a satellite or the like thus making the clock very accurate, and are communicated to the display component. Similar to the initial set of values, the updated set of values could be communicated to the display component directly from the set of DCR registers, or via the set of clock registers.
