PROGRAMMABLE TIME SWITCH

Abstract: A programmable time switch is disclosed. A time or time interval set by a user to be reserved is displayed on a display (100). The display (100) has a current time display part for displaying an hour hand (140) and a minute hand (130) which represent a current time, an hour unit display part (120) having segments of the number of a multiple of 6 or 12 for displaying the reserved time or time interval in terms of hours, and a minute unit display part (110) having segments of the number of a multiple of 60 for displaying the reserved time or time interval in terms of minutes. the current time and the AM or PM are digitally displayed on a current time display section (210) and an AM/PM display section (212), respectively. A set section (220) having a plurality of buttons (1-12, T, AP, P, P, D, C, M) are used for setting, cancelling or confirming the reserved time or time interval. A control section (200) controls through a drive section (230) a peripheral interface in accordance with the reserved time or time interval set through the set section (220), and displays the reserved time or time interval through the display (100). A memory (240) provides a program and a work area which are necessary for controlling the operation of the control section (200). A clock supply section (250) supplies a clock which is necessary for the controlling operation of the control section (200).

Description: PROGR7ΛM ABLE TIME SWITCH TECHNICAL FIELD The present invention relates to a programmable time switch, and more particularly, the present invention relates to a programmable time switch which supplements a function of a timer for controlling operations of diverse electronic and electric instruments or equipment and by which a number of time reservations are easily set and simply confirmed. BACKGROUND ART Generally, a timer has several operating modes as shown in FIG. 1. The operating modes of the timer include an A mode in which the timer is started at a current time and converted from an on-state to an off- state when a reserved time is reached or a reserved length of time is lapsed, a B mode in which the timer is started at the current time and converted from the off-state to the on-state when the reserved time is reached or the reserved length of time is lapsed, a C mode in which the timer is started from the off-state, is converted to the on-state for the reserved length of the time as the current time reaches the reserved time, and then is returned to the off-state, and a D mode in which the timer is started from the on-state, is converted to the off-state for the reserved length of time as the current time reaches the reserved time, and then is returned to the on-state. In the timer having the operating modes described above, a number of time reservations can be easily set and simply confirmed. Among timers of the prior art, a minute minder (timer) of a spiral spring type provides advantages in that it allows a desired time interval to be easily set from a current time. However, the minute minder of a spiral spring type has low precision in turning on/off equipment or an instrument at a precise time. Also, a mechanical programmable time switch of a quartz-vibrated type or a motor type provides advantages in that since a reserve pin is disposed in a shape of a circle and has 24 hour representations, a reserved time can be confirmed at a glance. However, since the mechanical programmable time switch is mechanically turned on or off, precision is deteriorated relying upon play between elements thereof. Also, since the reserve pin must be inserted by hand, it is difficult to reserve a minute unit which is smaller than 10 minutes or 15 minutes. Further, the mechanical programmable time switch has disadvantages in that the reserve pin must be disposed in the counterclockwise direction. In addition, while an electronic timer of a figure arranging type has high precision to allow time reservations of a second unit, it takes too much time to set a reservation program, an input scheme is so complicated that it is apt to be forgotten whereby the reservations must be set while referring to a manual. Also, the reservations cannot be confirmed at a glance. Further, another electronic timer of a circular crystal type provides advantages in that when a minimum segment is set to be larger than 20 minutes. However, in the electronic timer, it takes too much time to set the reservation at one minute or 5 minute units. For example, if one minute can be reserved into one segment and it takes one second, 10 seconds are needed to reserve 10 minute, 60 seconds are needed to reserve one hour, and 720 seconds (12 minutes) are needed to reserve 12 hours. For this reason, it takes too much time to set the reservations. Also, in the electronic timer, since a reserve mode or a release mode must be selected when one segment is passed upon reservation, a visual discrimination is made difficult. DISCLOSURE OF THE INVENTION Accordingly, the present invention has been made in an effort to solve the problems occurring in the prior art, and an object of the present invention is to provide a programmable time switch by which a number of time reservations are easily set and simply confirmed, whereby convenience of a user is enhanced. In order to achieve the above object, according to the present invention, there is provided a programmable time switch comprising: a display for displaying a time or a time interval set by a user to be reserved, the display having a current time display part formed at a center portion thereof for displaying an hour hand and a minute hand which represent a current time, an hour unit display part formed at a middle portion thereof and having segments of the number of a multiple of 6 or 12 for displaying the reserved time or time interval in terms of hours, and a minute unit display part formed at an edge portion thereof and having segments of the number of a multiple of 60 for displaying the reserved time or time interval in terms of minutes; a current time display section, an AM/PM display section and a mode display section for digitally displaying the current time, the AM or PM and an operating mode of a timer, respectively; a set section having a plurality of buttons for setting, canceling or confirming the reserved time or time interval; a control section for controlling through a drive section a peripheral interface connected thereto in accordance with the reserved time or time interval set through the set section, and for displaying the reserved time or time interval through the display; a memory for providing a program and a work area which are necessary for controlling operation of the control section; a clock supply section for supplying a clock which is necessary for the controlling operation of the control section; and a switch for keeping the drive section turned on or off irrespective of a setting of the timer or for making the drive section operate the timer. BRIEF DESCRIPTION OF THE DRAWINGS The above objects, and other features and advantages of the present invention will become more apparent after a reading of the following detailed description when taken in conjunction with the drawings, in which: FIG. 1 is a graph illustrating operating modes of a timer; FIG. 2 is a front view illustrating a construction of a programmable time switch in accordance with an embodiment of the present invention; FIGs. 3 through 8 are front views illustrating various display situations of a display embodying the present invention; and FIG. 9 is a block diagram of the programmable time switch of the present invention. BEST MODES FOR CARRYING OUT THE INVENTION Reference will now be made in greater detail to a preferred embodiment of the invention, an example of which is illustrated in the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings and the description to refer to the same or like parts. Referring to FIGs . 2 and 9, a programmable time switch according to the present invention includes a display 100 having an hour hand 140 and a minute hand 130 formed at a center portion thereof to represent a current time, an hour unit display part 120 formed at a middle portion thereof and having segments of the number of a multiple of 6 or 12 for displaying a reserved time or time interval in terms of hours, and a minute unit display part 110 formed at an edge portion thereof and having segments of the number of a multiple of 60 for displaying the reserved time or time interval in terms of minutes; a current time display section 210, an AM/PM display section 212 and a mode display section 214 for digitally displaying the current time, the AM or PM and an operating mode of a timer, respectively; a set section 220 having a plurality of buttons 1-12, T, AP, P, D, C and M for setting, canceling or confirming the reserved time or time interval and conditions thereof; a control section 200 for controlling through a drive section 230 a peripheral interface connected thereto in accordance with the reserved time or time interval and conditions thereof set through the set section 1-12, T, AP, P, D, C and M, and for displaying the reserved time or time interval and conditions thereof through the display 100; a memory 240 for providing a program and a work area which are necessary for a controlling operation of the control section 200; a clock supply section 250 for supplying a clock which is necessary for the controlling operation of the control section 200; and a switch 150 for keeping the drive section 230 turned on or off irrespective of a setting of the timer or for making the drive section 230 operate the timer. The display 100 has, as shown in FIG. 2, the hour hand 140 and the minute hand 130 and 140 including the hour hand 140, which are formed at the center portion thereof to represent the current time (Here, if it is necessary to display a second hand, a segment having the same size as the minute hand 130 and 140 can be used) . The display 100 also has the hour unit display part 120 formed at the middle portion thereof and having segments of the number of the multiple of 12 for displaying the reserved time or time interval in terms of hours, and the minute unit display part 110 formed at the edge portion thereof and having segments of the number of the multiple of 60 for displaying the reserved time or time interval in terms of minutes. The display 100 can be manufactured using a luminous element such as a liquid crystal display (LCD) panel or an electro-luminescence (EL) cell. The current time display section 210 digitally displays the current time. In addition, the AM/PM display section 212 for displaying the AM or PM and the mode display section 214 for displaying one of operating modes A, A', A 1 ', B, B', B'', C and D of the timer, are provided together with the current time display section 210. The mode display section 214 displays one of the operating modes A, A', A' 1 , B, B', B' 1 , C and D of the timer, which is selected through a mode select button M by a user. The set section 220 includes twelve time set buttons 1 through 12 disposed around the display 100 for symbolizing one through twelve o'clock and for allowing the reserved time or time interval to be set through it; a current time set button T used when setting the current time; a timer set button P used when setting the reserved time or time interval as the timer; a cancel button C for canceling the reserved time or time interval; an AM/PM select button for selecting AM or PM AP; and the mode select button M for selecting one of the operating modes A, A', A 1 ', B, B', B'', C and D of the timer; and a confirm button for confirming the reserved time or time interval of the timer. Here, when displaying the reserved time or time interval on the display 100, since all reservations including reserved times or time intervals which are within 12 hours from the current time must be displayed in the hour unit display part 120 having a configuration such as a circle, etc., it is difficult to precisely display minute units of the reservations on the hour unit display part 120. In other words, if the minute unit of the reserved time or time interval includes not 0 minutes or 30 minutes but 5 minutes, 47 minutes, etc., the reserved time or time interval cannot be precisely displayed to the minute unit when displayed on the hour unit display part 120. This problem is resolved by the minute unit display part 110. Namely, if the reserved time is 1 : 37, for displaying 37 minutes, the minute unit display part 110 is colored from a position of a 12th button 12 to a position of a clockwise 37th segment denoting 37 minutes. In this way, the minute unit of the reserved time or time interval can be precisely displayed. For providing a display, in case of the hour unit display part 120, an hour (for example, a time interval between a 12th button 12 and a 1st button 1) is composed of 6 or 12 segments. Accordingly, the hour unit display part 120 as a whole is composed of 72 or 144 segments. Further, in case of the minute unit display part 110, a time interval between the 12th button 12 and a 1st button 1 is composed of 5 segments. Accordingly, the minute unit display part 110 as a whole is composed of 60 segments. Hereinafter, operations of the programmable time switch constructed as mentioned above, will be described in detail. The operations of the programmable time switch of the present invention will be explained while being set out into embodiments for setting the timer. Four timer modes as shown in FIG. 1 will be exemplified. First, the current time must be precisely set. If the current time is 9 : 30 AM, after the current time set button T is pressed, the AM/PM select button AP is pressed to select AM. Then, to input 9 hours, a 9th button 9 is pressed, and to input 30 minutes, a 6th button 6 denoting 30 minutes is pressed one time. By this, a setting of the current time is completed, and the current time is displayed on the display 100 through the hour hand 130 and the minute hand 130 and 140 and is digitally displayed on the current time display section 210. At this time, if it is necessary to display a separate second hand, the minute hand 130 and 140 can be used as it is . Since the second hand moves every second, even when a time change of a second unit is displayed using the minute hand, the second hand and the minute hand can be clearly distinguished from each other. Here, coloring conditions of the display 100 are defined as follows. A monochromatic LCD generally has a white ground color and is colored with black when an electric field is applied to a liquid crystal. Accordingly, in the embodiments of the present invention, the timer is white-colored at its off-state and is black-colored at its on-state (Of course, it is possible to conversely define the coloring conditions. The same shall apply hereinafter) . Since the minute unit display part 110 can display the reserved time or time interval within 60 minutes, only the reserved segments which are within 60 minutes from the current time can be colored with black (hereinafter, simply referred to as "colored") or colored with white (hereinafter, simply referred to as "uncolored") . While an A mode and a B mode of the timer will be first described hereinbelow, since both the A mode and B mode have three embodiments, the three embodiments will be explained one by one based on the A mode (B mode is operated contrary to the A mode) . 1. A first embodiment of A mode (A mode) The A mode is, as shown in FIG. 3, started at the current time and converted from the on-state to the off-state when the reserved time is reached or a reserved length of time is lapsed. Hereinbelow, operations of the timer in the A mode will be explained. The A mode is first selected through the mode select button M. If the current time is 9 : 30 AM and the reserved time is 2 : 30 PM, after the timer set button P is pressed, the AM/PM select button AP is pressed to select the PM. Then, a 2nd button 2 is pressed and the 6th button 6 denoting a position of 30 minutes is pressed one time. At this time, if the 6th button 6 is not pressed any more in a predetermined time (for example, 3 seconds) , 30 minutes are set in the timer, and if the 6th button 6 is pressed one more time in the predetermined time (3 seconds) , the next minutes (time) are set in the timer. For example, when setting 2 : 31, after the 6th button 6 is pressed, the 6th button 6 is pressed one more time in the predetermined time (3 seconds) . Also, when setting 2 : 32, after the 6th button 6 is pressed, the 6th button 6 is pressed two more times. In this way, a time can be increased by one minute to 2 : 34 relying upon the number of times the 6th button is pressed (The same shall apply hereinafter) . In addition, if the AM/PM select button AP is pressed after pressing the timer set button P, one of the AM and PM in the AM/PM display section 212, which are changed in accordance with the current time, is flashed to represent the AM or PM of the reserved time. The result displayed on the display 100 is as follows . In order to display 2 : 30 in terms of hours, the hour unit display part 120 is colored from a middle position (denoting 30 minutes) between the 2nd button 2 and a 3rd button 3 to a position of the current time (since the current time is continuously changed, this position of the current time is also changed in accordance with the current time) (see FIG. 3(A)). All segments of the minute unit display part 110 are colored. Since the setting of the reserved time is completed, the AM/PM display section 212 having the PM flashed is restored to its original state to represent the AM according to the current time. If the current time is between 9 : 30 AM and 1 : 30 PM, since the reserved time does not exist within 60 minutes from the current time, all segments of the minute unit display part 110 are maintained in the colored state. If the current time passes 1 : 30, namely at the moment when the current time passes 1 hour, 30 minutes and 1 second, a 31st segment from the position of the 12th button 12 is uncolored (The same shall apply hereinafter) . In other words, from this time, a 30th segment denoting 60 minutes later from the current time (since the reserved time is set to 2 : 30) is maintained colored. As the time continuously goes by, segments are converted to an uncolored state one by one every one minute, (FIG. 3θrepresents a case in which the current time is 2 : 29) , and finally as the current time passes 2 : 30 PM, all segments of the hour unit display part 120 and the minute unit display part 110 are converted to the uncolored state. 2. A second embodiment of A mode (A' mode) This embodiment is used for providing a 60 minute timer, and due to this, a maximum timer set time is limited to 60 minutes. In this embodiment, the timer can be set by the minute unit within 60 minutes irrespective of the hour unit. For example, if the current time is 9 : 30 AM and the reserved length of time is 30 minutes, the timer operates as follows. After selecting the A' mode through the mode select button M, in order to set the reserved length of time to 30 minutes, the 6th button 6 denoting 30 minutes is pressed one time. ( If the reserved length of time is 47 minutes, the 9th button 9 denoting 45 minutes is pressed three times in the predetermined time. The same shall apply hereinafter). By setting the timer as described above, the hour unit display part 120 and the minute unit display part 110 are maintained in the on-state for 30 minutes from 9 : 30 to 10 : 00 to be colored, and as the current time reaches 10 : 00, they are converted into the off- state. Accordingly, the minute unit display part 110 is, as shown in FIG. 4(A), colored from a position of 30 minutes to a position of 60 minutes at an initial stage. However, as shown in FIGs . 4(B) and 4(C), as the current time passes 9 : 59 to reach 10 : 00, all segments of the minute unit display part 110 are converted to the uncolored state. 3. A third embodiment of A mode (A 11 mode) This embodiment is used for providing a timer capable of being set over 60 minutes. In this embodiment, a minute unit can be inputted by using the 1st button 1 through a 10th button 10, and by pressing the 10th button 10, '0' is inputted. In other words, by pressing the 1st button 1 through the 9th button 9, numbers of 1 through 9 are inputted, respectively, and by pressing the 10th button 10, a number of '0' is inputted. Due to this, all numbers of 0 through 9 can be inputted when setting the minute unit. For example, if the current time is 9 : 30 AM and the reserved length of time is 105 minutes, after the A' ' mode is selected through the mode select button M and the timer set button P is pressed, the 1st button 1, 10th button 10 and a 5th button 5 are sequentially pressed to input the minute unit of 105 minutes. The result displayed on the display 100 is as shown in FIG. 5. Since 105 minutes correspond to one hour and 45 minutes, the hour unit display part 120 is colored from the position of 9 : 30 to a position of 11 : 15 which represent a time when 105 minutes corresponding to one hour and 45 minutes are passed from the 9 : 30. Also, in the minute unit display part 110, since the reservations within 60 minutes from the current time are displayed on the minute unit display part 110, all segments of the minute unit display part 110 are colored (see FIG. 5(A). The same shall apply hereinafter) . Further, when 60 minutes are left to reach the 105 minutes, namely when the current time reaches 10 : 16 which is 60 minutes before 11 : 15, the minute unit display part 110 begins to be uncolored one segment by one segment (see FIG. 5(B)) as the current time goes by one minute (see FIG. 5(C)). 4. B mode (B, B' , B' ') The B mode(B, B', B' 1 ) is the same with the A mode in an operating principle but the coloring conditions thereof are opposite to the A mode. 5. C mode The C mode as shown in FIG. lOis a timer mode in which it is started from the off-state, is converted to the on-state for the reserved length of the time as the current time reaches the reserved time, and then is returned to the off-state. In case of the C mode, as shown in FIG. 6, it is selected through the mode select button M. If the current time is 10 : 30 AM and the reserved time interval is from 11 : 30 AM to 1 : 37 PM, since the current time belongs to AM, after pressing the timer set button P, an 11th button 11 is pressed to input the hour unit of 11 and the 6th button 6 denoting 30 minutes is pressed one time to input the minute unit of 30. Then, after pressing the timer set button P one more time, the PM is selected through the AM/PM select button AP. Thereafter, in order to input 1 : 37, the 1st button 1 is pressed to set the hour unit of 1 and a 7th button 7 denoting 35 minutes is pressed three times in the predetermined time to set the minute unit of 37. The result displayed on the display 100 in this case is as follows. At an initial stage, as shown in FIG. 6(A), the hour unit display part 120 is colored with black from a position of 11 : 30 (a middle portion between the 11th button 11 and the 12th button 12) to a position of 1 : 37 (a middle portion between the 1st button 1 and the 2nd button 2), and the remaining portion of the hour unit display part 120 is uncolored. At this time, as the current time passes 11 : 30, the colored segments of the colored portion on the hour unit display part 120 are converted into the uncolored state one by one in accordance with the current time (see FIG. 6 (c) ) . On the other hand, as the current time reaches 10 : 31 which is 60 minutes before the beginning time of 11 : 30, the minute unit display part 110 is colored every one minute one segment by one segment from a position of 30 minutes (denoted by the segment of the 6th button 6) (see FIG. 6(B)), and as the current time reaches 12 : 38 which is 60 minutes before the ending time of 1 : 37, the minute unit display part 110 is uncolored every one minute one segment by one segment from a position of 38 minutes (denoted by the clockwise third segment from the 7th button 7) (see FIG. 6(C)). 6. D mode The D mode as shown in FIG. 1(D) is a timer mode in which it is started from the on-state, is converted to the off-state for the reserved length of time as the current time reaches the reserved time, and then is returned to the on-state. In case of the D mode, as shown in FIG. 7, the D mode is selected through the mode select button M. If the current time is 10 : 30 AM and the reserved time interval is from 11 : 30 AM to 1 : 37 PM, since the current time belongs to AM, after pressing the timer set button P, the 11th button 11 is pressed to input the hour unit of 11 and the 6th button 6 denoting 30 minutes is pressed one time to input the minute unit of 30. Then, after pressing the timer set button P one more time, the PM is selected through the AM/PM select button AP. Thereafter, in order to input 1 : 37, the 1st button 1 is pressed to set the hour unit of 1 and the 7th button 7 denoting 35 minutes is pressed three times in the predetermined time to set the minute unit of 37. The result displayed on the display 100 in this case is as follows. The hour unit display part 120 is uncolored from the position of 11 : 30 (the middle portion between the 11th button 11 and the 12th button 12) to the position of 1 : 37 (the middle portion between the 1st button 1 and the 2nd button 2), and the remaining portion of the hour unit display part 120 is colored with black (see FIG. 7(A)). In other words, a portion of the hour unit display part 120, which corresponds to the reserved time interval is uncolored. Then, as the current time passes 11 : 30, the uncolored segments of the uncolored portion on the hour unit display part 120 are converted into the colored state one by one in accordance with the current time (see FIG. 7(C) ) . The minute unit display part 110 is processed in the same way as the C mode but the coloring conditions thereof are opposite to the C mode (see FIG. 7(B) and 7(C)) . 7. Multiple setting of C mode If situations of the C mode or D mode are repeated, namely when a number of reservations are made on the timer with predetermined time spans among them, the number of reservations can be set by repeatedly setting the C mode or D mode, and also a displayed minute unit represents a reserved time within 60 minutes from the current time as in the C mode or D mode . For example, if the current time is 10 : 25 AM, a first reserved time interval is from 11 : 30 AM to 1 : 37 PM, a second reserved time interval is from 1 : 50 PM to 2 : 30 PM and a third reserved time interval is from 11 : 00 PM to 1 : 00 AM, the result displayed on the display 100 in this case is as shown in FIG. 8. First, the hour unit display part 120 can be colored only when the reserved time is within 12 hours from the current time, and cannot be colored when the reserved time is not within 12 hours from the current time. This is because only 12 hours can be displayed by using the display 100 over 360°. Of course, the hour unit display part 120 can display a reserved time or time interval within 12 hours from the current time in the clockwise direction or in the counterclockwise direction. Accordingly, as shown in FIG. 8(A), since the current time is 10 : 25 AM, only the first reserved time interval and the second reserved time interval are displayed on the display 100. Then, as the current time passes 11 : 01 AM, the third reserved time interval begins to be displayed in accordance with the current time, and as the current time passes 1 : 00 PM, the third reserved time interval as a whole is displayed on the display 100. The minute unit display part 110 represents the reserved time or time interval which is within 60 minutes from the current time. (By using the minute unit display part 110 over 360°, it is possible to display the reserved time or time interval within 60 minutes from the current time in the clockwise direction or in the counterclockwise direction) . For example, when the current time is 10 : 25 AM, the minute unit display part 110 is maintained in the uncolored state. Then, as the current time reaches 10 : 31, the segment representing 30 minutes begins to be colored, and as the current time reaches 10 : 32, the segment representing 31 minutes begins to be colored. In this way, as the current time reaches 11 : 30, all segments of the minute unit display part 110 are colored. Also, as the current time reaches 12 : 38, the segment representing 38 minutes begins to be uncolored, and as the current time reaches 12 : 39, the segment representing 39 minutes begins to be uncolored. Further, as the current time reaches 1 : 37 PM, the segment representing 37 minutes is maintained in the colored state, and as the current time passes 1 : 37 PM, the segment representing 37 minutes is uncolored. At the same time, in order to display the second reserved time interval, as the current time reaches 12 : 51 PM, the minute unit display part 110 begins to be colored one segment by one segment every one minute from the segment representing 50 minutes, and as the current time reaches 1 : 00 AM, the minute unit display part 110 is displayed as shown in FIG. 8(C). On the other hand, since the C mode or D mode is repeated with a cycle of 24 hours, once the reserved time or time interval is made by the user, it is repeated with the cycle of 24 hours unless it is otherwise canceled by the user. A display result on the display 100 is also repeated. The cycle of repetition can be set to a week or a month, and for doing this, the set section 220 can further includes a cycle set section (not shown) . Also, the set section 220 can further includes a cycle display section (not shown) for displaying the cycle set through the cycle set section. Further, an operation for canceling the reserved time or time interval can be performed as follows. Namely, if the current time belongs to PM and it is required to cancel the reserved time interval from 1 : 35 PM to 3 : 20 PM, the cancel button C is pressed, and a button of a number which corresponds to the time unit between 1 : 35 PM and 3 : 20 PM, namely the 2nd button 2 or the 3rd button 3 is pressed. By doing this, the reserved time or time interval which is overlapped with the time unit which corresponds to the pressed 2nd button 2 or 3rd button 3 is automatically canceled. Also, if the current time belongs to the PM and it is required to cancel the reserved time interval from 1 : 36 AM to 1 : 37 AM, the cancel button C is also first pressed, and then the AM/PM button AP is pressed. Thereafter, the 1st button 1 is pressed and the 7th button 7 denoting 35 minutes is pressed two times, to cancel the reserved time interval. After that, as a predetermined time (for example, 10 seconds or 20 seconds) is lapsed, the display 100 is returned to its original screen in accordance with the current time. In order to confirm the reserved time or time interval, after the confirm button D is pressed, a screen (an AM screen or a PM screen) to be confirmed is selected through the AM/PM button AP, and then a button of a number which corresponds to a time unit of the reserved time or time interval is pressed. At this time, if the reserved time or time interval was set, a corresponding situation is displayed on the display 100, and if the reserved time or time interval was not set, nothing is displayed on the display 100, whereby simple confirmation is ensured. In other words, if it is required to confirm reservations of the AM or the PM through the hour unit display part 120 at a glance, by pressing the confirm button C, when the current time belongs to the AM, the reserved time or time interval set from 00 : 00 AM to 12 : 00 AM is displayed on the hour unit display part 120. Then, by pressing the AM/PM button AP one time, the reserved time or time interval set from 12 : 00 PM to 24 : 00 PM is displayed. In this state, by pressing the AM/PM button AP one more time, the screen displays again reservations belonging to the AM. If the current time belongs to the PM, by pressing the confirm button C, reservations (from 12 : 00 PM to 24 : 00 PM) belonging to the PM are displayed, and by pressing the AM/PM button AP, reservations (from 00 : 00 AM to 12 : 00 AM) are displayed. If it is required to confirm reservations of the AM through the minute unit display part 110, when the current time belongs to the AM, after the confirm button C is pressed, a button of a number which corresponds to a minute unit of the reserved time or time interval is pressed. For example, if the current time belongs to the AM and the reserved time interval is from 9 : 15 AM to 9 : 21 AM, after the confirm button C is pressed, the 9th button 9 is pressed. By this, reservations belonging to the AM are displayed as a whole on the hour unit display part 120 and the minute unit display part 110. For example, segments of the minute unit display part 110 are colored from a position of the 3rd button 3 denoting 15 minutes to a position of a segment clockwise next to a 4th button 4 denoting 20 minutes, and after the predetermined time (for example, 10 seconds or 20 seconds) is lapsed, the display 100 is returned to its original screen in accordance with the current time . When the reserved time is reached after the timer is set, contacts of the timer are moved to a predetermined mode. At this time, the hour unit display part 120 and the minute unit display part 110 can be flashed to allow the user to confirm the fact that the contacts of the timer are moved to the predetermined mode. In this way, the operation of the timer can be checked. INDUSTRIAL APPLICABILITY As a result, by a programmable time switch of the present invention, advantages are provided in that a number of time reservations are easily set and simply confirmed, whereby convenience of a user is enhanced. In the drawings and specification, there have been disclosed typical preferred embodiments of the invention and, although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention being set forth in the following claims.

Claims: CLAIMS : 1. A programmable time switch comprising: a display for displaying a time or time interval set by a user to be reserved, the display having a current time display part formed at a center portion thereof for displaying an hour hand and a minute hand which represent a current time, an hour unit display part formed at a middle portion thereof and having segments of the number of a multiple of 6 or 12 for displaying the reserved time or time interval in terms of hours, and a minute unit display part formed at an edge portion thereof and having segments of the number of a multiple of 60 for displaying the reserved time or time interval in terms of minutes; a current time display section and an AM/PM display section for digitally displaying the current time and the AM or PM, respectively; a set section having a plurality of buttons for setting, canceling or confirming the reserved time or time interval; a control section for controlling through a drive section a peripheral interface connected thereto in accordance with the reserved time or time interval set through the set section, and for displaying the reserved time or time interval through the display; a memory for providing a program and a work area which are necessary for controlling operation of the control section; and a clock supply section for supplying a clock which is necessary for the controlling operation of the control section. 2. The programmable time switch as claimed in claim 1, wherein the set section comprises: twelve time set buttons disposed around the display for symbolizing one through twelve o'clock, the twelve time set buttons allowing the reserved time or time interval to be set through it; a current time set button used when setting the current time; a timer set button used when setting the reserved time or time interval as a timer; a cancel button for canceling the reserved time or time interval; an AM/PM select button for selecting the AM or PM; and a confirm button for confirming the reserved time or time interval of the timer. 3. The programmable time switch as claimed in claim 1, wherein the reserved time or time interval is set through the set section such that the programmable time switch is turned on or off between the current time and the reserved time or after the reserved time interval is lapsed from the current time; and when the timer is converted from an on-state to an off-state or from the off-state to the on-state, the display is colored between a position of the current time and a position of the reserved time in the clockwise direction or in the counterclockwise direction. 4. The programmable time switch as claimed in claim 1, wherein when the timer is started from the off-state, is converted to the on-state for a predetermined time and returned to the off-state or when these situations are repeated several times, or when the timer is started from the on-state, is converted to the off-state for a predetermined time and returned to the on-state or when these situations are repeated several times, the display is colored over the reserved time interval in the on-state or uncolored over the reserved time interval in the off- state. 5. The programmable time switch as claimed in claim 1, wherein when setting the reserved time or time interval using the twelve time set buttons, an o'clock is inputted by a button first pressed, and a minute is inputted by another button second pressed at least one time. 6. The programmable time switch as claimed in claim 1, wherein the hour unit display part is used for displaying in terms of hours the reserved time or time interval which is within 12 hours from the current time in the clockwise direction or in the counterclockwise direction, and is automatically colored or uncolored in accordance with the current time; and the minute unit display part is used for displaying in terms of minutes the reserved time or time interval which is within 60 minutes from the current time in the clockwise direction or in the counterclockwise direction, and is automatically colored or uncolored in accordance with the current time. 7. The programmable time switch as claimed in claim 1, wherein once the reserved time or time interval is set by the user, it is repeated with a cycle of 24 hours unless otherwise canceled. 8. The programmable time switch as claimed in claim 1, wherein once the reserved time or time interval is set by the user, it is repeated with a cycle of predetermined days unless otherwise canceled. 9. The programmable time switch as claimed in claim 1, further comprising: a mode display section for displaying an operating mode of the timer; a switch for keeping the drive section turned on or off irrespective of setting for the timer or for making the drive section operate the timer; and a mode select button for selecting the operating mode of the timer. 10. The programmable time switch as claimed in claim 1, wherein the display for displaying a time or time interval set by a user to be reserved, comprises: a current time display part having the hour hand, the minute hand and a second hand which cooperatively represent the current time; an hour unit display part having a predetermined configuration such as a circle formed around the current time display part for displaying in terms of hours the reserved time or time interval which is within 12 hours from the current time in the clockwise direction or in the counterclockwise direction; and a minute unit display part having a predetermined configuration such as a circle formed outside or inside the hour unit display part for displaying in terms of minutes the reserved time or time interval which is within 60 minutes from the current time in the clockwise direction or in the counterclockwise direction.

Inventors: KIM JOO-SUL, KIM, JOO-SUL
Applicants: KIM JOO SUL, KIM, JOO-SUL
Application year: 1998
Main classification: G04G15
IPC codes: G04G9, G04G15