KR20040001040A - Alarm clock having video control function for monitor - Google Patents

Abstract

PURPOSE: An alarm clock having a computer monitor blocking function is provided to block a video signal line being connected between a computer and a monitor after operating time is over and operate an alarm clock as a conventional clock conveniently. CONSTITUTION: A ring signal detecting unit(310) detects a ring signal being inputted from a telephone line. A DTMF(Dual Tone Multi-Frequency) decoder(330) decodes a DTMF signal being inputted from a telephone line. A hook unit(320) hooks on or a hook off a telephone line. A switching unit connects or disconnects an input video signal line to an output video signal line. When a ring signal is detected from the ring signal detecting unit(310), a control unit counts the number of ring times. If the number of ring times is larger than predetermined times, the control unit controls the hook unit(320) in a setting mode, hooks off the hook unit(320), and transmits a predetermined signal sound to the telephone line. If button data pressed by a user are received from the DTMF decoder(330), the control unit interprets the data. If the data display a password setting, a password inputted by the user is stored. If the data display an operation time setting, the password is checked, operation time is set in accordance with a setting of the user, and the hook unit(320) is controlled and hooked on. If computer operating time is set in an operating mode, the control unit turns on the switching unit for only set time, and the video signal line is connected.

Description

Alarm clock having video control function for monitor

The present invention relates to an alarm clock, and more particularly, to an alarm clock having a monitor blocking function so as to control the computer use time.

In recent years, as computers are widely used as household necessities and widely used in homes, and countless computer games have appeared, children are becoming more addicted to computer games. Therefore, disagreement between children who want to play computer games and their parents to prevent them is causing family discord. To solve these problems, various means have been developed to limit the time children spend using computers. It is becoming.

As a conventional technique for restricting the use of the computer, the time management software is installed in the computer main body, and the computer power is cut off at a certain time, but this software method is used to increase the management software as children's computer knowledge increases. There is a problem that can be invalidated.

The present invention has a computer monitor blocking function that can be used by blocking the video signal line connected between the computer and the monitor after the operation time to solve the above problems, so that the computer can not be used, and operate conveniently as a normal clock Its purpose is to provide an alarm clock.

1 is a connection diagram for connecting an alarm clock according to the present invention,

2 is an external view of an alarm clock according to the present invention;

3 is a block diagram of an alarm clock according to the present invention;

4 is a flowchart illustrating a procedure for setting a password according to the present invention;

5 is a flowchart illustrating a procedure for changing a password according to the present invention;

6 is a flowchart illustrating a procedure for setting a monitor operating time according to the present invention;

7 is a flowchart illustrating a procedure for controlling monitor operation in accordance with the present invention;

8 is a flowchart illustrating a procedure of setting a current time according to the present invention;

9 is a flowchart illustrating a procedure for setting an alarm time in accordance with the present invention.

☞ Explanation of symbols for the main parts of the drawing ☜

111,112,113,115a, 115b: LED114: time display segment

116: display segment 302: video input port

304: video output port 306: relay

308: regulator 310: ring signal detection unit

320: hook portion 330: DTMF decoder

In order to achieve the above object, the alarm clock of the present invention is a ring for detecting a ring signal input from a telephone line in a clock which displays the current time and connects or blocks a video signal between a computer and a monitor. A signal detector; A DTMF decoder for decoding a DTMF signal input from a telephone line; A hook portion for making a state of a telephone line hook-on or hook-off; Switching means for connecting or disconnecting the input video signal line with the output video signal line; And when the ring signal is detected from the ring signal detection unit, counts the number of rings, and if the number of rings is greater than a predetermined number of times, the hook unit is controlled to be in a hook-off state in a setting mode, and a predetermined signal tone is transmitted to the telephone line and from the DTMF decoder. When the button data received by the user is received and interpreted, the password is set when the password is stored by the user, and when the operating time is set, the operating time is set according to the user's setting after confirming the password and controlling the hook part after the setting is completed. And a control means for changing the hook-on state and controlling the connection of the video signal line by turning on the switching means only for a predetermined time when the computer operation time is set in the operation mode.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a connection diagram for connecting an alarm clock according to the present invention.

The alarm clock 110 according to the present invention has a function of displaying the current time, a time setting function, and an alarm function like a normal clock, and in addition, it is possible to use a computer by connecting a computer and a monitor only for a set operating time. There is a function. The computer operating time can be set via a telephone line so that parents can control the operating time of the computer at home while they are away or traveling.

In the alarm clock 110 of the present invention, as shown in FIG. 1, the video input port is connected to the video output port of the computer 101 by a cable, and the video output port of the alarm clock 110 is connected to the monitor 102. It is connected to video input port and cable. At this time, each video port and cable should not be separated by children by a separate locking device. That is, in order for the computer monitor blocking function according to the present invention to be effective, the computer 101 and the monitor 102 should not be connected without passing through the alarm clock of the present invention, which is connected from the computer 101 to the monitor 102. Each cable shall be locked so that it cannot be disconnected without permission.

And the alarm clock 110 of the present invention is a four-line telephone line provided from the adapter 105 is connected to the RJ-11 port, wherein two lines are "Tip", "Ring" line of the telephone line, two lines are direct current Power line. The adapter 105 is connected to the telephone line distributor 104, one end of which is connected to the switch side of the public telephone network, and the other end thereof is connected to the telephone 103.

In this configuration, the video signal from the computer 101 to the monitor 102 is transmitted via the alarm clock 110 of the present invention, and the ring signal transmitted from the public telephone network is passed through the telephone line distributor 104 to the telephone 103. And the alarm clock 110 is delivered. At this time, the alarm clock 110 of the present invention detects and counts ring signals transmitted from the public telephone network, and then uses a telephone to make a hook-off when the number of rings rings is at least eight times. It does not interfere at all.

Figure 2 is an external view of the alarm clock according to the present invention, Figure 3 is a block diagram of the alarm clock according to the present invention.

The appearance of the alarm clock 110 according to the present invention has a time display segment 114 and a minute display segment 116 for displaying time on the front of the case 116, as shown in FIG. There are LEDs 115a and 115b for distinguishing, and there are LEDs 111, 112 and 113 for indicating on / off of the alarm function in the morning and afternoon. In addition, there are buttons such as a reset switch K5, an alarm K1, a time K2, an up K3, a down K4 for resetting the clock of the present invention. Although not shown in the figure, the rear panel has a video input port for connecting a video cable, a video output port, and an RJ-11 port for connecting a telephone line.

In addition, the configuration of the alarm clock according to the present invention, as shown in Figure 3, the alarm (K1), time (K2), up (K3), down (K4), reset (K5) and the like, and the morning LED display (111), afternoon display LED (112), alarm display LED (113), hour / minute classification LED (115a, 115b), time display segment (114), minute display segment (116), video input port (302), It is composed of a video output port 304, a relay 306, a relay driving transistor Q1, a regulator 308, a ring signal detector 310, a hook 320, a DTMF decoder 330, and an MCU 340. .

Referring to FIG. 3, the alarm key K1 is a key for setting an alarm function, the time key K2 is a key for setting a time, and the up / down keys K3 and K4 are set at the time of setting. It is the key to increase or decrease time. The reset key K5 is a key for resetting the entire operation. The AM / PM display LEDs 111/112 indicate that the currently displayed time is AM / PM, and the alarm display LED 113 is turned on when the alarm function is turned on. When the lamp is off, the alarm function is off.

The time display segment 114 displays the current time, and the hour / minute division LEDs 115a and 115b distinguish between hours and minutes and display operation states, and the minute display segment 116 indicates the current minute. The video input port 302 is connected to the video output port of the computer by a cable, and the video output port 304 is connected to the video input port of the monitor. The video input port 302 and the video output port 304 are connected or disconnected according to the operation of the relay 306, and the relay 306 is turned on / off according to the operation of the transistor Q1.

The ring signal detection unit 310 detects that a ring signal is input from the telephone line (Tip, Ring) and transmits the ring signal to the microprocessor (MCU) 340, and the hook unit 320 is connected to the telephone line under the control of the microprocessor 340. Make the (Tip, Ring) hook-on or hook-off. The DTMF decoder 330 decodes a DTMF signal input from a telephone line (Tip, Ring) and delivers data corresponding to a key pressed by the user to the microprocessor 340. The microprocessor 340 performs a password setting function, a password changing function, an operating time setting function, a monitor video connection or blocking function, a time setting function, an alarm setting function, and the like, as described below. The regulators 7805 and 308 convert the DC 9V voltage input from the adapter into a stable 5V and provide it to each part that needs a power source.

4 is a flowchart illustrating a procedure for setting a password according to the present invention.

The alarm clock 110 according to the present invention requires a password when setting the computer usage time to prevent children from using the computer by arbitrarily setting the computer operating time. Therefore, the parent needs to set a password during the initial installation.

To set a password, first dial the phone number to which the alarm clock is connected (401). When dialed, the communication network provides a ring signal of 20Hz 90V as the called number, and accordingly, the ring signal is input to the Tip and Ring terminals of the alarm clock (402). The ring signal detection unit 310 detects the received ring signal and notifies the MCU 340, and the MCU 340 counts the number of ring signals to control the hook unit 320 when the number of ring signals reaches eight times. To be. Accordingly, the outgoing telephone and the incoming alarm clock are connected to each other (403 to 406).

When the communication line is connected, the MCU 340 transmits a "삑" signal through the telephone line (Tip, Ring) to indicate that it is ready to receive an input, and enters "#" and "0" on the phone to enter a password. Request setup (407, 408). When pressing "#" and "0" on the telephone, the DTMF encoder of the telephone is converted into a signal of the corresponding frequency, which is decoded by the DTMF decoder 330 of the alarm clock through the communication network and transmitted to the MCU 340. When the MCU 340 receives data "#" and "0" from the DTMF decoder 330, the MCU 340 recognizes that the password is set and outputs a "beep" signal for inputting the password (409).

When the user hears the "beep" signal, the user enters a password, followed by "*" (410, 411). In the embodiment of the present invention, the password is defined as four digits. The input password is converted into a DTMF signal in the same manner as described above and transmitted to the alarm clock, decoded by the DTMF decoder 330 of the alarm clock, and then transmitted to the MCU 340. The MCU 340 stores the input password in the internal nonvolatile memory (EEPROM) and then outputs a "beep" signal indicating that the password has been successfully set (412,414). Then hook-on and disconnect (414,415).

5 is a flowchart illustrating a procedure for changing a password in accordance with the present invention.

In order to change the password once set, dial the phone number to which the alarm clock is connected (501). When dialed, the communication network provides a ring signal of 20Hz 90V as the called number, and thus the ring signal is input to the tip and ring terminals of the alarm clock (502). The ring signal detection unit 310 detects the received ring signal and notifies the MCU 340, and the MCU 340 counts the number of ring signals to control the hook unit 320 when the number of ring signals reaches eight times. To be. Accordingly, the calling telephone and the incoming alarm clock are connected to each other (502 to 506).

When the communication line is connected, the MCU 340 transmits a "삑" signal through the telephone line to indicate that it is ready to receive an input, and enters "#" and "2" on the phone to notify that the password is changed (507,508). ). When pressing "#" and "2" on the telephone, the DTMF encoder of the telephone is converted into a signal of a corresponding frequency, and the DTMF signal is decoded by the DTMF decoder 330 of the alarm clock through the communication network and transmitted to the MCU 340. When the MCU 340 receives the data "#" and "2" from the DTMF decoder 330, the MCU 340 recognizes that the password is changed and outputs a "beep" signal for inputting the password before the change (509).

When the user hears the "beep" signal, the user inputs the password before the change, and the MCU 340 compares the password with the password stored in the internal nonvolatile memory and if it matches, erases the password and outputs a signal "beep beep" at the same time. do. If it does not match, the signal "beep" requesting the input again is output (511 ~ 515).

The user then enters a new password and presses the "*" button (516,517). Accordingly, the DTMF signal corresponding to the new password is transmitted to the DTMF decoder 330 and decoded, and the MCU 340 receives the new password and stores it in the internal nonvolatile memory (518). The device then hooks on and disconnects (519, 520).

6 is a flowchart illustrating a procedure of setting a monitor operating time according to the present invention.

The alarm clock 110 normally disconnects the video input port 302 and the video output port 304 so that the monitor screen cannot be viewed. Therefore, if you want to operate the computer, you must first set the operating time.

Referring to FIG. 6, in order to set a computer operation time, the alarm clock is dialed to a connected telephone number (601). When dialing, the communication network provides a ring signal of 20Hz 90V as the called number, and accordingly, the ring signal is input to the Tip and Ring terminals of the alarm clock (602). The ring signal detection unit 310 detects the received ring signal and notifies the MCU 340, and the MCU 340 counts the number of ring signals to control the hook unit 320 when the number of ring signals reaches eight times, so that the ring signal is in a hook-off state. (603 to 605). Accordingly, the calling telephone and the incoming alarm clock are connected to each other (606).

When the communication line is connected, the MCU 340 transmits a "삑" signal through the telephone line to indicate that it is ready to receive an input, and enters "#" and "1" on the telephone to notify that the operating time is set ( 607,608). When pressing "#" and "1" on the telephone, the DTMF encoder of the telephone is converted into a signal of the corresponding frequency, and this DTMF signal is decoded by the DTMF decoder 330 of the alarm clock through the communication network and transmitted to the MCU 340. . When the MCU 340 receives data "#" and "1" from the DTMF decoder 330, the MCU 340 recognizes that the operation time is set and outputs a "beep" signal for inputting a password (609).

The user inputs a password when a "beep" signal is heard, and the MCU 340 compares the input password with a password stored in an internal nonvolatile memory and outputs a signal "beep" to input an operation time if it matches. If it does not match, it outputs a "beep" signal requesting input again (610 to 613).

The user then enters the operating time and presses the "*" button (614,615). Accordingly, the operating time can be set to four digits, "00" hour "00" minute. The DTMF signal corresponding to the operation time is transmitted to the DTMF decoder 330 and decoded, and the MCU 340 receives the operation time and stores it in an internal nonvolatile memory, indicating that the operation time has been successfully set. The signal is output (614 to 616). It then hooks on and disconnects (617, 618).

7 is a flowchart illustrating a procedure for controlling monitor operation in accordance with the present invention.

Referring to FIG. 7, when the MCU 340 turns off the monitor connection relay 306 and the operating time is set, the MCU 340 drives the transistor Q1 to turn on the relay 306, and thus the video input line and the video output. Wires are connected and video signals are sent to the monitor. Next, the operating time is counted, and when the operating time of connecting the monitor reaches the set operating time, the monitor connection relay is turned off (701 to 706). Therefore, the video signal from the computer to the monitor is only connected during the set operating time.

8 is a flowchart illustrating a procedure of setting a current time according to the present invention.

In order to set the current time of the alarm clock, the time button is pressed (801). When the time button K2 is pressed, the time display lamp blinks (802). Then press the up or down button to set the desired time (803). At this time, the morning light 111 is turned on to indicate the morning and the afternoon light 112 is turned on to indicate the afternoon, so it is necessary to set AM and PM separately.

When time setting is completed and the time button K2 is pressed again, the minute display lamp flashes (804 and 805). At this time, press up or down button to set the desired minute. Press the time button K2 again to complete the time setting.

9 is a flowchart illustrating a procedure of setting an alarm time according to the present invention.

In order to set the alarm time of the alarm clock, the alarm button K1 is pressed (901). When the alarm button K1 is pressed, the time display lamp blinks (902). Then press the up or down button to set the desired time (903). In this case, the AM indicator lights up when AM is displayed and the PM indicator lights up when PM is indicated. Therefore, it is necessary to set AM and PM separately.

If the alarm button K1 is pressed after setting the time, the minute display lamp blinks (904, 905). At this time, the desired minute is set by pressing the up or down button (906). When the alarm button K1 is pressed again, the alarm display lamp 113 is turned on to complete the alarm time setting. Here, since the alarm function is turned on by pressing the alarm button once and turned off once again, the alarm function is confirmed by the alarm display lamp 113.

As described above, the present invention can operate as a clock and control the computer operating time, thereby preventing children from using the computer indiscriminately. In particular, the operating time can be set via a telephone line, so that the computer operating time can be set even when away from home or far away, and the use of a password prevents children from setting the operating time without permission.

Claims (4)

In the clock which displays the current time and connects or blocks the video signal between the computer and the monitor, A ring signal detector for detecting a ring signal input from a telephone line; A DTMF decoder for decoding a DTMF signal input from a telephone line; A hook portion for making a state of a telephone line hook-on or hook-off; Switching means for connecting or disconnecting the input video signal line with the output video signal line; And When the ring signal is detected by the ring signal detection unit, the number of rings is counted, and when the ring signal is more than a predetermined number of times, the hook unit is controlled to be in a hook-off state in a setting mode, and a predetermined signal tone is transmitted to the telephone line and the user is transmitted from the DTMF decoder. When the button data is received, it is interpreted when the password is set. If the password is set, the password entered by the user is stored. If the operating time is set, the password is set according to the user's setting after confirming the password. And a control means for switching to the hook-on state and controlling the connection of the video signal line by turning on the switching means only for a set time when the computer operation time is set in the operation mode. Alarm clock. The alarm having a computer monitor blocking function according to claim 1, wherein the control means interprets the button data transmitted from the DTMF decoder and checks the old password if the password is changed, and stores the new password in the internal nonvolatile memory. clock. The alarm clock having a computer monitor blocking function according to claim 1 or 2, wherein the control means is a microprocessor having an ipyrom therein. The alarm clock of claim 1, wherein the alarm clock includes a time, an alarm, and an up / down button to set a current time and an alarm time.