KR20060120762A - Mobile communication terminal having distance measurement sensor - Google Patents

Abstract

A mobile communication terminal having a distance sensor is provided to display a screen of an LCD when a cover is open, to intercept a screen of an LCD when a cover is closed, and to make it possible to control a key button inputting unit concurrently. A mobile communication terminal having a distance sensor comprises a signal transceiver(1), a signal processor(2) and a controller(3). The signal transceiver(1) outputs a transmitting signal, and receives a signal reflected on a sliding unit or an object. The signal processor(2) converts a signal of the signal transceiver(1) into digital information appropriate for data calculation, and transmits the converted digital information. The controller(3) processes the digital information transmitted from the signal processor(2), checks whether a sliding unit is open or closed, and controls an on/off operation of an LCD(4) and a key button inputting unit(5) according to the checking result.

Description

Mobile communication terminal with distance sensor {MOBILE COMMUNICATION TERMINAL HAVING DISTANCE MEASUREMENT SENSOR}

 1 is a block diagram showing the configuration of a mobile communication terminal having a distance sensor according to an embodiment of the present invention.

 2 is a view showing a state in which the sliding part of the mobile communication terminal having a distance sensor according to the present invention is open.

 3 is a diagram illustrating a facial proximity call state of a mobile communication terminal having a distance sensor.

<Explanation of symbols for the main parts of the drawings>

1: signal transceiver

2: signal processing unit

3: control unit

4 liquid crystal display

5: key button input unit

10: distance sensor

20: sliding part

30: main body

40: user

100: mobile communication terminal

The present invention relates to a mobile communication terminal having a distance sensor, and more particularly, to determine whether or not the cover of the mobile communication terminal is opened or closed by measuring the distance to turn on / off the liquid crystal display (LCD). It relates to a mobile communication terminal that can automatically control).

Due to the rapid spread of personal mobile communication, most people are using mobile communication terminals. Mobile communication terminals are largely classified into a flip type, a folder type, and a slide type according to the type of a cover capable of protecting a plurality of key buttons against external contact.

Mobile communication terminals are becoming more and more common in the form of folders or slides, which are advantageous for miniaturization, so that they are small and easy to carry, and the majority of users are using mobile communication terminals in the form of folders or slides.

The mobile communication terminal performs on / off control of the screen of the liquid crystal display of the mobile communication terminal by using a limit switch using magnetic force, a projection or a button switch having a contact according to the opening and closing operation of the cover.

In addition, the key button input unit of the mobile communication terminal also controls on / off in accordance with the opening and closing operation of the cover.

However, the limit switch method using the magnetic force has a problem that the plate attached to the magnet is weak in impact because it is embedded in a housing made of glass that is easily broken.

In addition, the projection using the projection and the button switch is inserted into the groove formed on one surface of the key button input portion of the projection formed on the cover of the mobile communication terminal, and press the button switch on the printed circuit board to turn on / off the liquid crystal display There was a problem that the contact between the protrusion and the button switch is not exactly matched with the pressing position of the button switch occurs.

In addition, it is troublesome to control the on / off control of the liquid crystal display and the key button input unit by installing parts on both the cover part and the key button input part of the mobile communication terminal.

In addition, there is a disadvantage in that unnecessary power consumption is consumed because the screen of the liquid crystal display is turned on and the key button input unit is in an operating state even during a near-facing call where the screen confirmation and the key button input cannot be used.

Accordingly, the present invention is to solve the above-mentioned conventional problems, by determining whether the cover of the mobile communication terminal is opened or closed, to display the screen of the liquid crystal display when the cover is open, and to block the screen of the liquid crystal display when the cover is closed The present invention provides a mobile communication terminal capable of controlling the key button input unit at the same time.

In addition, the present invention provides a mobile communication terminal capable of preventing unnecessary power consumption by turning off the liquid crystal display and the key button input unit during a near-facing call where the screen of the liquid crystal display cannot be confirmed.

In order to achieve the above object, a mobile communication terminal having a distance sensor according to the present invention is a mobile communication terminal including a liquid crystal display and a key button input unit. The received signal emits a transmission signal and is reflected by a cover or an object. Signal transmitting and receiving unit for receiving; A signal processing unit converting the signal of the signal transmission and reception unit into digital information suitable for data operation and transmitting the converted signal; And a controller for processing whether the cover of the mobile communication terminal is opened or closed by processing the digital information transmitted from the signal processor, and controlling on / off of the liquid crystal display and the key button input unit according to the determination result.

The control unit turns off the liquid crystal display and the key button input unit when the distance between the mobile communication terminal and the object is maintained within a predetermined size range.

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

1 is a block diagram showing the configuration of a mobile communication terminal 100 having a distance sensor according to an embodiment of the present invention.

Referring to FIG. 1, a mobile communication terminal 100 having a distance sensor according to the present invention includes a distance sensor 10, a controller 3, and a liquid crystal display 4. The distance sensor 10 includes a signal transceiver 1 and a signal processor 2.

As shown in FIG. 1, the distance sensor 10 emits a signal (electromagnetic wave including light or vibration wave including ultrasonic wave) toward the front to detect whether the sliding unit 20 of the mobile communication terminal is opened or closed. It consists of a signal transceiver 1 for receiving a signal reflected back to the object, and a signal processor 2 for converting and transmitting the information transmitted from the signal transceiver 1 into digital information suitable for data operation. The control unit 3 processes the digital information transmitted from the signal processing unit 2, and if it is determined that the cover of the mobile communication terminal is closed according to the transmitted digital information, the liquid crystal display unit 4 and the key button according to the determination result. The input unit 5 is turned off.

2 is a view showing a state in which the sliding part 20 of the mobile communication terminal 100 having the distance sensor 10 according to the present invention is open.

As shown in FIG. 2, in the sliding type mobile communication terminal 100, the distance sensor 10 is an upper side of the rear side of the sliding part 20 which is opened when the sliding part 20 of the communication terminal 100 is open. Or installed above the key button input unit 5, and emits a signal (such as electromagnetic waves including light or vibration waves including ultrasonic waves) toward the front that is opened when the sliding unit 20 of the mobile communication terminal 100 is opened And a signal processor (2) for receiving the signal reflected back to the signal, and a signal processor (2) for converting and transmitting the information transmitted from the signal transceiver (1) into digital information suitable for data operation. The control unit 3 processes the digital information transmitted from the signal processing unit 2, and if it is determined that the cover of the mobile communication terminal is closed according to the transmitted digital information, the liquid crystal display unit 4 and the key button according to the determination result. The input unit 5 is turned off.

Therefore, the on / off of the liquid crystal display 4 and the key button input 5 can be controlled in this manner.

Here, the distance sensor 10 used refers to a sensor that measures the distance using the sensor. At this time, the ultrasonic sensor is mainly used for the near distance measurement. The principle of distance measurement using an ultrasonic sensor is as follows.

The ultrasonic sensor includes a signal transmitter and a receiver, and generates ultrasonic waves from the transmitter, and measures the distance by the ultrasonic waves reflected from the object reaching the receiver.

For example

d: distance between sensor and object

v: speed of sound waves (air speed: 340m / s)

t: time taken for the sound wave transmitted from the transmitter to reach the receiver

θ: half angle of angle between sensing object and sensor

Thus the distance d = (t × v × cosθ) / 2

Dividing by 2 is because the measured time (t) is the time to arrive at the object and back to the sensor.

As described above, the distance sensor 10 according to the present invention is divided into a transmitter and a receiver, and emits a signal toward the front from the transmitter, and is reflected by the sliding unit 20 or the object of the mobile communication terminal 100. Receive the return signal from the receiver.

In addition, the sensor detects whether the sliding part 20 is opened or closed by a simple reflection type, and if the sliding part 20 is present within a predetermined angle and a predetermined distance, the sensor is not used, and thus the upper surface of the liquid crystal display 4 and the main body 30 are not included. Turn off the key button input section (5). Therefore, the liquid crystal display unit 4 and the key button input unit 5 can be controlled.

3 is a diagram illustrating a state in which the mobile communication terminal 100 including the distance sensor 10 is used.

As such, even when the terminal is in use, if the distance sensor 10 is installed on the upper side of the key button input unit 5, the distance sensor 10 is a simple reflection type and the distance of the object or the user is within a predetermined proximity distance. The controller 40 detects whether the face 40 is located and the controller 3 determines that the proximity proximity call state is the state in which the sliding part 20 of the mobile communication terminal 100 is closed when the state in which the user face 40 is positioned continues. The liquid crystal display section 4 and the key button input section 5 are turned off.

Therefore, even during a call, unnecessary power consumption can be prevented by automatically turning off the power supply of the liquid crystal display part 4 and the key button input part 5 in the face near-call state where the liquid crystal display part 4 cannot be confirmed.

As mentioned above, although preferred embodiment of this invention was described, this invention is not limited to the above-mentioned embodiment, The general knowledge in the field to which this invention belongs does not deviate from the summary of this invention claimed by a claim. Of course, any person having a variety of modifications can be made, and such changes are naturally within the scope of the appended claims.

According to the mobile communication terminal equipped with the distance sensor of the present invention, the liquid crystal display and the key button input unit can be stably and simply operated because only one sensor can operate the conventional method of controlling unnecessary operation of the terminal by opening or closing a cover or using a specific key. Can be controlled.

In addition, the liquid crystal display and the key button input unit can be automatically turned off even during a near-facing call where the liquid crystal display screen cannot be confirmed, thereby preventing unnecessary power consumption.

Claims (2)

In the mobile communication terminal comprising a liquid crystal display and a key button input unit, A signal transmitting / receiving unit which emits a transmission signal and receives a reception signal reflected by a sliding unit or an object; A signal processing unit converting the signal of the signal transmission and reception unit into digital information suitable for data operation and transmitting the converted signal; And a controller configured to process the digital information transmitted from the signal processor to determine whether the sliding part of the slide type mobile communication terminal is opened or closed, and to control on / off of the liquid crystal display and the key button input part according to the determination result. Mobile communication terminal having a distance sensor, characterized in that. The method of claim 1, And the control unit turns off the liquid crystal display and the key button input unit when the distance between the mobile communication terminal and the object is maintained within a predetermined size range.

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