KR100698165B1 - Current Exhaust Control Method in Terminal - Google Patents

Abstract

The present invention relates to a method of suppressing current consumption in a terminal so as to reduce unnecessary current consumption by appropriately controlling an additional display portion capable of guaranteeing actual call and standby time in the terminal. Such a present invention includes the steps of detecting whether the user of the terminal is busy in the user detection unit built in the terminal; If the user is detected, determining whether the user is talking over a predetermined time limit; Turning off the display power of the LCD in the power control circuit built into the terminal when the time limit is exceeded as a result of the determination; After the LCD power off, the step of adjusting the switching timing of the preset frequency to change the LED to the ON (ON) and OFF (OFF) state by the periodic, so that when the user uses a service other than the actual call The current consumption of the terminal can be reduced by using the limited battery capacity more efficiently by reducing the current consumption.

Terminal, LCD, LED

Description

Current Exhaust Control Method in Terminal

1 is a view for explaining the LED and LCD power consumption when using a conventional terminal.

2 is a flowchart illustrating an operation of consuming current when using a conventional terminal.

3 is a view for explaining the LED and LCD power supply control for reducing the current consumption of the terminal according to the present invention.

4 is a flowchart illustrating a method of reducing current consumption of a terminal according to the present invention.

The present invention relates to a method of suppressing current consumption in a terminal so as to reduce unnecessary current consumption by appropriately controlling an additional display portion capable of guaranteeing actual call and standby time in the terminal.

In general, the terminal consumes current not only during a call, but also during a reception standby, and the required current is supplied from a battery.

The module of the display portion of the terminal consists of a light emitting diode (LED) and a liquid crystal display (LCD).

The battery of the terminal has a lifespan of about 2 to 3 days so far, and the remaining amount of the battery is displayed on the liquid crystal display (LCD) of the mobile terminal so that it can be charged using a charger before it is completely discharged.

When the battery installed in the terminal is full, the reason for the current consumption of the terminal is relatively low when the terminal user attempts to make a call or waits for a call after the terminal is turned on. Can be mentioned.

1 is a view for explaining the LED and LCD power consumption when using a conventional terminal.

Referring to FIG. 1, when the terminal is powered on, the liquid crystal display (LCD) in the off state is switched to the on state, and when the user presses a key or opens a flip of the terminal. The light emitting diode (LED) is also switched from the off state to the on state.

When the terminal is waiting for reception, current of 10 to 50 mA is usually consumed.

In addition, when a user presses a keypad to make a call to a standby terminal, a current of about 100 mA is consumed while the LCD is in an ON state.

When the LCD of the terminal is in an ON state, the display is always in an enabled state and thus consumes current.

In addition, the purpose of using a light emitting diode (LED) is to conveniently use the terminal in a dark place. In order to control the light emitting diodes (LEDs), the on / off control signals are received from the CPU. Accordingly, current consumption proceeds according to a program of the internal logic circuit of the terminal, or ON / OFF is controlled according to the enable state of the keypad (when the terminal user inputs a key). .

At this time, since the brightness of the light emitting diode (LED) is kept constant, current consumption proceeds accordingly. Therefore, the terminal continuously consumes about 100 mA of current while the display unit is enabled.

2 is a flowchart illustrating an operation in which current is consumed when a conventional terminal is used.

Referring to FIG. 2, when the user turns on the power of the terminal (S11), the liquid crystal display (LCD) is turned on (S22), and the user waits for the keypad input (S23). .

If the user presses the keypad to make a call, the power of the light emitting diode LED is turned on and the LCD brightens with a constant intensity of illumination (S24).

The light emitting diode LED waits for a predetermined time for a preset timing, and then turns off again when the set timing is exceeded.

Then, according to the user's call attempt, after the call channel is formed (S25), when the call channel is formed, the light emitting diode (LED) is switched to the on state again with a constant intensity.

However, the conventional terminal display method has a lot of additional services such as a short message service (SMS) or a voice information message transmission function even if the call is not actually made because the on / off is constant. As a result, a certain amount of battery standby time is significantly reduced.

An object of the present invention has been made in view of the above-mentioned problems of the prior art, by reducing the unnecessary current consumption by appropriately controlling the additional display portion to ensure the actual call and standby time in the terminal requiring power saving It is to provide a method of suppressing the current consumption of a terminal to be able to.

Such a present invention includes the steps of detecting whether the user of the terminal is busy in the user detection unit built in the terminal; If the user is detected, determining whether the user is talking over a predetermined time limit; Turning off the display power of the LCD in the power control circuit built into the terminal when the time limit is exceeded as a result of the determination; After the LCD power off, the step of adjusting the switching timing of the preset frequency to change the LED to the ON (ON) and OFF (OFF) state periodically.

Preferably, changing the LED to an on state and an off state comprises setting the frequency to a predetermined range that may cause optical illusion, and then adjusting the switching time to turn on and off the LED. The brightness of the LED is adjusted by using the time difference that occurs as a result of the repetition of the operation that changes to the (OFF) state.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

The peculiarity of the present invention is a method for reducing the current consumed when the user uses an additional service other than the actual call purpose, and the current for a predetermined time using the control frequency of the liquid crystal display (LCD) and the light emitting diode (LED). In addition to the consumption, the brightness (illuminance) of the light emitting diode (LED) can be adjusted arbitrarily.

Such a structure of the terminal according to the present invention includes a liquid crystal display (LCD) unit for displaying a call and standby state, battery capacity, a user detection unit (User Detection) unit for detecting a point of time when a user calls the terminal to the ear, and light emission It consists of a LED control logic (LED control logic) for adjusting the current consumption and illumination of the diode (LED), and a keypad portion receiving the user's key input.

The user detection unit is a sensor implemented in hardware, and widely uses an optical sensor or an EMG sensor.

3 is a view for explaining the LED and LCD power supply control for reducing the current consumption of the terminal according to the present invention.

)이 온(ON)되면, 오프(OFF)상태의 액정표시창(LCD)이 온(ON) 상태로 디스플레이 되며, 사용자가 키를 누르거나 단말기의 플립을 열었을 경우에 발광다이오드(LED) 역시 오프 상태에서 온(ON) 상태로 전환된다. Referring to Figure 3, the power supply of the terminal (

When is ON, the LCD is displayed in the OFF state, and when the user presses a key or opens the flip of the terminal, the LED is also off. It is switched on from.

When the LCD of the terminal is in an ON state, the display is always in an enabled state and thus consumes current. Therefore, the user sensing unit provided in hardware in the logic circuit inside the terminal in consideration of the fact that the user does not need to see the contents displayed on the liquid crystal display (LCD) of the terminal when the user is talking on the ear or using the earphone ( User Detection) detects the point of time when the user calls the terminal to the ear and cuts off the power supplied to the LCD through the control circuit if the call continues for a predetermined time after the call is connected. Accordingly, it is possible to prevent the consumption of current consumed due to the on state of the liquid crystal display (LCD).

In addition, an important purpose of the light emitting diode (LED) is to conveniently use the terminal in a dark place. Accordingly, when the on / off control signal is received from the central processing unit (CPU) to control the light emitting diode (LED), current consumption proceeds according to the program of the internal logic circuit of the terminal, or the keypad is enabled. It controls the ON / OFF according to the state (when the user presses a key).

Therefore, the software program uses a control pin to turn off the LCD display power and control the light emitting diode (LED) at n seconds after the call is connected. Switch to reduce current consumption.

That is, when using a conventional terminal, the brightness of the light emitting diode (LED) is kept constant and current consumption is progressed accordingly, but when the on / off by giving a time difference at a high speed that is not recognized by the human eye, due to the afterimage effect In view of the fact that human vision cannot recognize the off, the terminal can save as much current as the time that the LED is off. Based on the important features of the present invention mentioned above will be described with reference to the accompanying drawings an operation for performing a method of reducing the current consumption of the terminal.

4 is a flowchart illustrating a method of reducing current consumption of a terminal according to the present invention.

Referring to FIG. 4, first, when the user turns on the power of the terminal (S41), the LCD is generally displayed first (S42), and the user inputs the keypad in a call waiting and reception waiting state. Wait for (S43).

When the user presses a key input button of the terminal to attempt a call, the LED of the terminal is turned on (S44).

When the user presses the "call" button of the terminal, the connection process proceeds for a predetermined time to form a communication channel between the base station and the terminal (S45).

At this time, the user detection unit (User Detection) provided in hardware inside the terminal detects whether or not the user talks (S46).

If a call channel is established between the base station and the terminal and the user calls the terminal through the ear or through an ear phone to perform a call with the other terminal, the user detection unit detects this and the user sets a predetermined limit. It is determined whether the call is continued using the terminal for more than the time (S47), and if the call continues even after the time limit, the power supplied to the LCD through the control circuit is cut off (S48).

As a result, nothing is displayed on the LCD of the terminal when the user is in a call. In addition, if you set a constant frequency (typically 30Hz) that can cause optical illusion and turn on / off the light emitting diode (LED) at a speed that is not recognized by human vision, human vision is caused by the afterimage effect. Since the off may not be recognized, the brightness of the LED may be adjusted (S49).

Thereafter, when the user's call is terminated (S50), when the "end" key is pressed, the power of the LCD which is turned off is turned on and is displayed again, thereby performing the operation of the universal terminal again. .

Therefore, the current consumption reduction effect of the terminal can be obtained through such a method, and if applied, the color can be mixed by using various colored LED chips to realize the color by adjusting the switching time. Softer colors are available.

In addition, by detecting a state that the user is talking on the terminal and turning off the display power of the LCD which is not necessary during the call, a method of suppressing unnecessary current consumption is applied. By setting the time, even if the user does not make a call after the set time limit or there is no call received from the other party's terminal, the ripple effect that can suppress unnecessary current consumption by turning off the power of the LCD is obtained. There is this.

 According to the present invention mentioned above, the user can use the limited battery capacity more efficiently by reducing the current consumption when using services other than the actual call purpose. Therefore, the current consumption reduction effect of the terminal can be obtained through such a method, and a method of detecting unnecessary current consumption by turning off the display power of a liquid crystal display (LCD) that is not necessary for a call by detecting a state in which the user is talking to the terminal. By setting a predetermined time limit even in a call waiting state and a reception waiting state of the terminal, the user can turn off the LCD even when the user does not make a call after the set time limit or there is no call received from the other terminal. There is an advantage that a ripple effect that can suppress unnecessary current consumption can be obtained.

In addition, the brightness can be adjusted by adjusting the switching duty of the light emitting diodes (LEDs), so if the colors are mixed by using a variety of colored light emitting diode (LED) chips by applying this, switching control You can use softer colors when you adjust the brightness using.

Claims (4)

Detecting a user or an object of the terminal by a user detector embedded in the terminal; And, When the user or the object is detected, turning off the display power of the LCD by a power control circuit built in the terminal. The method of claim 1, The step of turning off the power, the current consumption suppression method of the terminal, characterized in that is performed when the call time of the user exceeds a predetermined time limit. The method of claim 1, And controlling the switching timing rate of a preset frequency to periodically change the LED to an on state and an off state after the LCD power is turned off. 4. The method of claim 3, wherein changing the LED to an on state and an off state comprises setting the frequency to a predetermined range that can cause optical illusion, and then adjusting the switching time to turn on the LED. And controlling the brightness of the LED by using a time difference generated by repetition of an operation of changing to an OFF state.

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