Electronic Timepiece

Abstract: A CPU (13) determines a currently selected mode by referring to RAM (16) based on programs stored in ROM (17) and when the mode is a function needing continuous visual recognition such as chronograph, timer or the like and the function is being executed, marks representing functions set to ON state are turned off by referring to a state setting RAM (16B) and when a notification is needed in operating a function set in the ON state, a mark indicating the notification is turned on on displaying means (15).

Description: BACKGROUND OF THE INVENTION Field of the Invention: The present invention relates to an electronic timepiece having a plurality of functions for displaying displays showing states of setting these functions on a display portion. Description of the prior Art: Generally, according to an electronic timepiece having a plurality of functions of an alarm function, a timer function, a stopwatch (chronograph) function and the like, not only time is displayed on a display portion but also marks indicating states of setting these functions, that is, states of ON/OFF are simultaneously displayed. Fig. 9 shows a display in a state in which a chronograph mode is selected in a conventional electronic timepiece. In Fig. 9, a chronograph 51 and current time 52 are displayed on a display portion 50. Further, a summer time mark 53 indicating an ON state of setting summer time, an alarm mark 54 indicating an ON state of an alarm function, a confirming sound mark 55 indicating an ON state of a confirming sound or a time informing sound function in operating an operation button (not illustrated) of an electronic timepiece and a lamp mark 56 indicating an ON state of lamps for illuminating the display portion, are turned on. In this case, there are functions other than the functions represented by the turned-on marks and these functions indicate an OFF state, that is, a state in which marks representing these functions are turned off. Fig. 10 is a flowchart showing a displaying processing of the alarm mark 54 in the conventional electronic timepiece. The displaying processing is one of periodical display updating processings which are carried out in respect of all of displays on the display portion 50. In reference to Fig. 10, it is firstly determined whether the alarm function is set to ON (step S201). When the alarm function is set to ON at step S201, the alarm mark 54 is turned on (step S202) and the processing in the flowchart is finished. When the alarm function is not set to ON at step S201, the alarm mark 54 is turned off (step S203) and the processing in the flowchart is finished. In respect of marks with regard to other functions of the confirming sound mark 55, the lamp mark 56 and so on, processings similar to that in the flowchart of Fig. 10 are repeatedly carried out. By the displays of these marks, it can be easily determined what function is currently made ON in the electronic timepiece. Further, according to the conventional electronic timepiece, for example, the alarm function is a function dependent on current time and accordingly, it Is not appropriate to operate the function during a time period in which a time correcting mode for correcting time is selected and an operation of correcting time is being carried out. In this case, even when the alarm function is set to ON, the ON state is forcibly changed into the OFF state and simultaneously, the alarm mark is turned off. According to the conventional electronic timepiece explained above, in the case in which a number of functions are provided and the functions are set to the ON state, a number of marks or the like displayed on the display portion becomes also large. In the case in which when the electronic timepiece is used by setting a large number of the provided functions to the ON state, a function needing continuous visual recognition of the display portion, for example, the chronograph function or the like is realised, function marks are turned on other than that of the chronograph display portion to which attention is to be paid and the visual recognition performance is not necessarily regarded excellent. Particularly, in the case of an electronic timepiece of a portable type such as a wristwatch or the like, a display region of the display portion is limited and the above-described problem of the visual recognition performance becomes significant. For example, when the chronograph display and the current time display are simultaneously displayed at positions different from each other, it is difficult to instantaneously discriminate them from each other since shapes of these displays are similar to each other. Further, monochromatic liquid crystals are frequently used as the display portion and in recognising visually the display of the chronograph or the like which is repeatedly updated continuously and at high speed, function marks turned on at a surrounding of the chronograph display portion are not necessarily needed. GB 2028547A describes a display device for an electronic digital watch, in which a number of functions can be displayed. These functions include geographical time, alarm time and a chronographic function. A chronograph function is displayed in the display screen shown in figure 6 of this document. Together with the time display of the chronograph function, a "lap" icon and a "stop" indication are also displayed as pertaining directly to the chronograph function. The chronograph function is therefore shown in its executed form and, in order to make it easier to concentrate on the chronograph display itself, other unrelated icons are suppressed. In FR 2480958, a digital watch is described. The watch has a display for displaying a time function plus a number of icons relating to various functions of the watch. The invention seeks to make it as simple as possible to carry out the various settings and functions of the watch. One of the functions is a chronometer function. The present invention has been carried out in view of inconvenience provided in the conventional technology and it is an object of the invention to provide an electronic timepiece for promoting visual recognition performance when a function needing visual recognition of a display portion continuously such as the chronograph function or the like is realised. SUMMARY OF THE INVENTION In accordance with the invention, there is provided an electronic timepiece having a plurality of functions needing continuous visual recognition, said functions including a chronograph function or a time function, the timepiece comprising means whereby: when one of said functions is selected, one or more marks associated with one or more further functions, which do not need continuous visual recognition, are not turned off, when said function is being executed, said one or more marks are turned off, and when said function is stopped or reset, said one or more marks are turned on again. There maybe a plurality of further functions, a display in respect of one or more of the further functions lying adjacent to a display of the chronograph or timer function, the timepiece comprising means whereby, when the chronograph function or timer function is being executed, the display in respect of at least the one or more of the further functions is turned off. Means may be provided whereby, when the chronograph function or timer function is being executed, the display in respect of the further function is turned off, and when notification is needed during operation of the further function, a display of the notification is turned on. Notification may also take the form of the emission of a sound. BRIEF DESCRIPTION OF DRAWINGS A preferred form of the present invention is illustrated in the accompanying drawings in which: Fig. 1 is a block diagram showing an outline constitution of an electronic timepiece according to an embodiment; Fig. 2 is a view showing a case portion of the electronic timepiece according to the embodiment; Fig. 3 is a view for explaining operation of the electronic timepiece according to the embodiment; Fig. 4 is a view for explaining operation of the electronic timepiece according to the embodiment; Fig. 5 is a view for explaining operation of the electronic timepiece according to the embodiment; Fig. 6 is a flowchart for explaining the operation of the electronic timepiece according to the embodiment; Fig. 7 is a view for explaining operation of an electronic timepiece according to another embodiment; Fig. 8 is a view for explaining the operation of the electronic timepiece according to the other embodiment; Fig. 9 is a view for explaining operation of a conventional electronic timepiece, and Fig. 10 is a flowchart for explaining the operation of the conventional electronic timepiece. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A detailed explanation will be given of embodiments of an electronic timepiece according to the invention in reference to the drawings as follows. Further, the invention is not limited by the embodiments. Fig. 1 is a block diagram showing an outline constitution of an electronic timepiece according to the invention. In Fig. 1, an electronic timepiece according to the invention is constituted by displaying means 15 for enabling time display or displays necessary for realizing other functions, a display driver circuit 18 for driving the displaying means 15, ROM 17 stored with programs for realizing a time display or other functions, a switch input portion 14 for realizing selection of functions or various inputting processings by a user, a central processing unit (CPU) 13 for realizing the functions based on the programs stored in ROM 17 and transmitting display signals to the display driver circuit 18 for displaying these functions on the displaying means 15, an oscillating circuit 11 for forming a clock for accurately driving CPU 13 and a clock necessary for measuring time and a dividing circuit 12 for supplying CPU 13 with a clock having a desired frequency by dividing the clock provided from the oscillating circuit 11. Further, the electronic timepiece according to the invention is installed with RAM 16 for storing states of setting respective functions with regard to a plurality of functions and CPU 13 displays displays in accordance with the respective functions on the displaying means 15 by referring to the set states stored in RAM 16. Further, RAM 16 includes a mode RAM 16A for storing information of currently selected functions carrying major operation, that is, selected modes and a state setting RAM 16B for storing states of setting respective functions. Examples of modes stored in the mode RAM 16A, there are noted a time correcting mode, a chronograph mode, a timer mode and the like. That is, the modes signify functions which need to continuously update displays on the displaying means 15 with instruction from a user via the switch input portion 14 as a trigger. Fig. 2 shows a case portion of the electronic timepiece according to the invention. In Fig. 2, input buttons 23 through 27 correspond to the switch input portion 14, mentioned above and may be arranged on side faces of the case portion 21 as in the input buttons 23 through 26 or may be arranged at a front face as in the input button 27. These input buttons are classified respectively into, for example, a mode select button for selecting modes, a start button and a stop button for further constituting triggers of start and finish of operation of a function in a selected mode, a shift button functioning only by a combination thereof with other button and so on. Further, a display necessary for realizing a function is displayed on a display portion 22. Fig. 3 shows a display in a state of selecting the chronograph mode in the electronic timepiece according to the invention. In Fig. 3, the chronograph 31 and current time 32 are displayed on a display portion 30. Further, a summer time mark 33 indicating an ON state of setting summer time, an alarm mark 34 indicating an ON state of an alarm function, a confirming sound mark 35 indicating an ON state of a confirming sound or a time informing sound function in operating the input buttons 23 through 27 shown by Fig. 2 and a lamp mark 36 indicating an ON state of lamps for illuminating the display portion, are turned on. In this case, there are functions other than the functions represented by the turned-on marks and these functions indicate an OFF state, that is, states in which marks representing these functions are turned off. Fig. 3 particularly shows a state of resetting the chronograph mode and the chronograph function is not executed. The chronograph function Is executed only when any of the input buttons 23 through 27 is operated. That is, time measurement is started. Fig. 4 shows a display state of the display portion 30 in executing the chronograph function. At this occasion, during a time period in which the chronograph 31 continuously carries out time display in accordance with elapse of time, the summer time mark 33, the alarm mark 34, the confirming sound mark 35 and the lamp mark 36 which have been turned on in Fig. 3, that is, in the state of resetting the chronograph mode, are turned off. Thereby, the visual recognition performance of the chronograph 31 is promoted and even when a user looks away from the display portion 30 and again looks at the display portion 30, the user can pay attention to the chronograph 31 instantaneously. Although in Fig. 4, the current time 32 is displayed, it may be turned off. Further, by operating any of the input buttons 23 through 27, the function of the chronograph is stopped and by operating the input button for bringing the chronograph mode into the reset state, the display on the display portion 30 shown by Fig. 3 is again recovered. That is, by finishing the time measurement and resetting the chronograph 31, the marks indicating the functions set in the ON state are again turned on. Particularly, the operation of turning off the function marks in executing the chronograph function does not signify that the functions set in the ON state are not changed into the OFF state. Therefore, in the case in which In executing the chronograph function, for example, the current time reaches the alarm set time in the alarm function in the ON state, the alarm mark 34 is turned on and the alarm sound is emitted by which the user can be notified thereof. Further, the alarm mark 34 may not only be turned off but may be set to intermitent display or winking. Fig. 5 shows a display state of the display portion 30 when the alarm set time and the current time coincide with each other in executing the chronograph function and the alarm function stays in the ON state. Processings of turning on and turning off the function marks explained above are carried out based on the programs stored in ROM 17. Fig. 6 is a flowchart showing the display processing of the alarm mark 34 in the electronic timepiece according to the invention. The display processing is one of periodical display updating processings which are carried out in respect of all of displays on the display portion 30. In Fig. 6, firstly, whether the alarm function is set to ON is determined by referring to the state setting RAM 16B (step S101). When the alarm function is not set to ON in step S101, the alarm mark 34 is turned off (step S105) and the processing In the flowchart is finished. When the alarm function is set to ON in step S101, whether a currently selected mode is the chronograph mode or the timer mode is determined by referring to the mode RAM 16A (step S102). When the currently selected mode is the chronograph mode or the timer mode in step S102, it Is determined further whether the mode is being carried out (in this case, measuring time) (step S103). In step S103, in a case in which the selected mode is being executed, it is further determined whether the case is a case in which the current time reaches alarm set time in the alarm function, that is, the alarm time coincides with the current time (step S104). When the alarm time does not coincide with the current time at step S104, the alarm mark 34 is turned off (step S105) and the processing in the flowchart is finished. When the currently selected mode is not the chronograph mode or the timer mode at step S102, when the selected mode is not being executed in step S103 and when the alarm time coincides with the current time at step S104, the alarm mark 34 is turned on (step S106) and the processing in the flowchart is finished. Further, processings similar to that in the flowchart shown by Fig. 6 are repeatedly carried out in respect of marks with regard to other functions such as the confirming sound mark 35, the lamp mark 36 and so on. Therefore in executing the function needing the continuous visual recognition such as the chronograph mode, the timer mode or the like, the visual recognition performance is promoted by erasing marks indicating other functions set in the ON state and when notification of alarm or the like is needed in the other functions set in the ON state, the mark indicating the notification (normally, a function mark serves also as the mark) can be turned on and the notification of coincidence of the alarm time with the current time or the like to the user is achieved. Although according to the embodiment explained above, as shown by Fig. 3, time, function marks and so on are displayed in the single display portion 30, but is another embodiment, in a display portion 40 shown by Fig. 7, a display region 41 and a display region 42 which are different from each other may be provided and displays different from each other may be carried out. In this case, the display region 41 can display current time and the display region 42 can display chronograph or time 43, a battery remaining capacity display 44, a chronograph mode mark 45, a timer mode mark 46 and letters or marks indicating other function setting states. According to the display portion 40 shown in Fig. 8, when the timer mode is currently selected and the time mode is executed, display on the display region 41 is turned off and display of other than the time 43 is turned off on the display region 42. Further, when a notification is needed in other functions set in the ON state, a mark indicating the notification (normally a function mark serves also as the mark) is turned on. Further, in the case of the embodiment, the display on the display region 41 may be turned on and a portion in the display of other than the timer 43 may be turned off on the display region 42. According to the first constitution of the invention, when the function for carrying out the operation needing the continuous visual recognition is being executed, a display in respect of other than the function is turned off and accordingly, the visual recognition performance can be promoted with regard to the display in respect of the operation of the function. Further, according to the second constitution of the invention, when the function for carrying out the operation needing the continuous visual recognition is being executed, the display at the surrounding of the display at least in respect of the function in the displays in respect of other than the function is turned off and accordingly, the visual recognition performance can be promoted with regard to the display in respect of the operation of the function. Further, according to the third constitution of the invention, when the one function for carrying out the operation needing the continuous visual recognition is being executed, the displays in respect of other than the function are turned off and when the notification is needed in the operation of the other function, the display in respect of the notification is turned on and accordingly, the visual recognition performance can be promoted with regard to the display in respect of the operation of the function and the operation of the other function can be achieved. Further, according to the fourth constitution of the invention, when the one function for carrying out the operation needing the continuous visual recognition is being executed, the display at the surrounding of the display with regard to at least the function in the displays in respect of other than the function is turned off and when the notification is needed in the operation of the other function, the display in respect of the notification is turned on and accordingly, the visual recognition performance can be promoted with regard to display in respect of the operation of the function and the operation of the other function can be achieved. Further, according to the fifth constitution of the invention, particularly when the time measuring function is being executed, the displays in respect of other than the time measuring function are turned off and accordingly, the visual recognition performance can be promoted with regard to the display in respect of the operation of the time measuring function. The aforegoing description has been given by way of example only and it will be appreciated by a person skilled in the art that modifications can be made without departing from the scope of the present invention.

Claims: An electronic timepiece having a plurality of functions needing confinuous visual recognition, said functions including a chronograph function or a time function, the timepiece comprising means whereby: when one of said functions (31) is selected, one or more marks (33, 34, 35, 36) associated with one or more further functions, which do not need continuous visual recognition, are not turned off; when said function (31) is being executed, said one or more marks (33, 34, 35, 36) are turned off, and when said function (31) is stopped or reset, said one or more marks (33, 34, 35, 36) are turned on again. An electronic timepiece according to Claim 1, wherein there are a plurality of further functions, a display (44, 45, 46) in respect of one or more of the further functions lies adjacent to a display (43) of the chronograph or timer function, and the timepiece comprises means whereby, when the chronograph function or timer function (31) is being executed, the display (44, 45, 46) in respect of at least the one or more of the further functions is turned off. An electronic timepiece according to Claim 1 or Claim 2, comprising means whereby, when the chronograph function or timer function (31) is being executed, the display (34) in respect of the further function is turned off, and when notification is needed during operation of the further function, a display (34) of the notification is turned on. An electronic timepiece according to Claim 3, comprising means for omitting a sound when the display of the notification is turned on.

Inventors: YUZUKI TOSHIYUKI, YUZUKI, TOSHIYUKI, Yuzuki, Toshiyuki, C/O Seiko Instruments Inc.
Applicants: SEIKO INSTR INC, SEIKO INSTRUMENTS INC.
Application year: 1999
Main classification: G04G9
IPC codes: G04G9