KR101137590B1 - Safe apparatus for mobile terminal - Google Patents

Abstract

The present invention relates to a safety device of a mobile terminal, the display unit is coupled to the terminal body so as to be open and close, the terminal body is a touch keypad on the contact surface in contact with the touch keypad of the display unit in the mobile terminal having a touch keypad. And a conductive touch sensing unit for confirming contact with the touch panel, and a conductive touch sensing unit for verifying contact with the touch keypad is formed on a contact surface in contact with the touch keypad of the display unit. The touch keypad is electrically connected to the connection portion. The present invention is a safety device of the mobile terminal as described above removes the hall effect sensor which is a universal device used as the opening and closing detection of the display unit in the mobile terminal to which the existing touch keypad is applied, and removes a specific part of the existing touch keypad. By integrating the functions of the touch keypad and the opening / closing detection function of the display part, the operating voltage of the hall effect sensor is not required, which reduces the current consumption of the terminal itself. It is also effective in terms of pin assignment and can reduce product cost.

Description

Mobile device safety device {SAFE APPARATUS FOR MOBILE TERMINAL}

1 is a perspective view of a conventional portable terminal in the form of an open folder.

Figure 2 is a plan view showing a safety device of a mobile terminal according to an embodiment of the present invention.

Figure 3 is a plan view showing a safety device of a mobile terminal according to another embodiment of the present invention.

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

100: terminal body 110: touch keypad

200: display unit 210: LCD

300: touch detection unit 301,302: metal surface

310: connection part

The present invention relates to a safety device of a mobile terminal for detecting opening and closing of a display unit of a mobile terminal to which a touch pad is applied to a keypad. The display unit is coupled to the terminal body to be openable and close, and the terminal body is provided with a touch keypad. In the above, the present invention relates to a safety device of a mobile terminal for forming a contact sensing unit on a contact surface in contact with the touch-type keypad of the display unit to check the opening and closing of the display unit.

With the development of computer technology, computer-based systems for various purposes are being developed, and the demand for accurate and quick convenience in using such systems is increasing. In addition, the need for an input device capable of easily operating the device is increasing in computers and multimedia devices that are becoming smaller and smaller, and there is a limitation in moving and using the input device using a conventional keyboard or mouse. Touch panel is used as an input device that can be input by direct contact with the touch panel.

By using the touch panel, users can operate the device easily by touching the button displayed on the display, so that anyone can easily operate the machine, ticket machines such as bank machines, movie theater history, medical equipment, navigation, PDA, Widely applied in mobile communication terminals, etc., it is a device that is already deeply established throughout our lives.

The touch panel has different characteristics according to various kinds, and accordingly, it is used for each characteristic in various usage environments. In Japan, resistive touch panels are mainly used, and in the United States where the original technology is used, Surface Acoustic Wave Technology ), Infrared Beam Technology, Integral Strain Guage Technology, Piezo Electric Technology, etc. are being used. Hall effect sensors were used.

Hall effect sensor is a principle that senses by measuring the voltage change when the conductor is placed between the permanent magnets and electricity flows to the conductor due to the change of magnetic flux generated between the existing permanent magnets.

In general, the configuration of a portable terminal such as a mobile phone includes a terminal main body having a plurality of buttons formed on an upper surface thereof and a control panel (not shown) for controlling various functions therein, and one end of which is hinged to the terminal main body. It is opened and closed with respect to the terminal body, and consists of a folder having a screen which protects the terminal body and allows the other party to see the image. A battery for charging and discharging is detachably coupled to the lower surface of the terminal body. In the antenna is formed an antenna for transmitting and receiving radio waves.

Referring to the drawings, FIG. 1 is a perspective view of a conventional portable terminal in the form of an open folder, and as shown therein, a terminal body 10 having a control part (not shown) for controlling various functions. And a folder 30 having one end hinged to the terminal body 10 to open and close the terminal body 10 and to protect the terminal body 10.

A keypad 20 is provided on an upper surface of the terminal body 10, and a battery 31 for charging and discharging is detachably coupled to a lower surface thereof. An antenna 32 protrudes from an upper end of one side to protrude and transmit radio waves. have.

The folder 30 is provided with a screen 33 for viewing the other party as an image.

In the mobile terminal to which the conventional touch keypad of this type is applied, a common device used as the opening / closing detection of the display unit is a Hall Effect sensor, and in order to use the Hall effect sensor, a voltage supply of 2.4 to 3.3V is required. There is a need to allocate a general purpose input output (GPIO) pin of the MSM in order to detect the opening and closing state of the display unit, there is a problem that the price competitiveness in the related market is reduced due to the increase in the cost of the product.

The present invention has been made in order to solve the above problems and defects as described above, the display unit is coupled to the terminal body so as to be open and close, the terminal body is a mobile terminal equipped with a touch keypad, the touch unit of the display unit It is an object of the present invention to provide a safety device for a mobile terminal in which a sensor used as a signal for detecting an opening and closing of a display unit becomes unnecessary by forming a contact detecting unit on a contact surface in contact with a keypad so as to confirm the opening and closing of the display unit.

In order to achieve the above object, the safety device of a mobile terminal according to the present invention is coupled to a display unit in a terminal body so as to be open and close, and in a mobile terminal having a touch keypad in a terminal body, the display unit touches a touch keypad. The contact sensing unit is formed on the contact surface to be configured to check the opening and closing of the display unit.

For example, the present invention adds a metal surface to a mechanism having an LCD of a display unit of a plunge type mobile terminal, and when the display unit is opened and closed, touches the touch keypad portion of the terminal and the metal surface portion of the display unit to detect it, The sensing signal is transmitted to a baseband chipset, so that the display unit of the terminal is opened and closed.

The present invention removes the hall effect sensor and utilizes a specific part of the existing touch keypad to integrate the function of the touch keypad and the opening / closing detection function of the display unit, thus eliminating the need for an operating voltage of 2.4 to 3.3 V of the hall effect sensor. It is effective in increasing the waiting time by reducing the current consumption. It is also effective in the GPIO pin assignment of MSM, which is becoming insufficient due to various functions added recently.

The touch panel applicable for opening and closing detection of the mobile terminal proposed by the present invention is a capacitive overlay technology and a resistive overlay method.

The contact capacitive method is made by coating a transparent special conductive metal (TAO: Tin Antimony Oxide) material on both sides of the glass constituting the touch screen sensor, and utilizes the capacitance in the human body. The touch screen uses glass coated with a thin metal conductive material and allows a certain amount of current to flow on the glass surface. When the user touches the coated glass surface, a certain amount of current is absorbed into the user's body, and the touch screen recognizes the changed portion of the current to identify the touched portion.

This type of touchpad responds to skin or metal (conductor), such as the fingers of the human body, and does not work when brought to a non-conductive non-conductive material such as paper, rubber, plastic.

The resistive film type is formed by coating a resistive element on a glass plate and covering a special film on it. Apply a resistive element inside the special film, and insulate the rods at regular intervals so that the resistive element does not touch the glass surface, and let a constant current flow through both ends of the resistive film. It is a way of detecting parts.

More specifically, in the mobile terminal employing the device of the present invention, the touch keypad in the main body of the terminal is composed of special keys such as numbers 0 to 9, #, *, and send, and each part includes sensors for key input function. In addition, a metal surface is added to a specific part of the mechanism part in which the LCD of the display part of the terminal is present.

When the display unit is closed, the touch keypad and the sensor of the part overlapping the metal surface function to detect the opening and closing of the display unit at the same time as the key input function. At this time, the address of the sensors located in this specific part is made into a look-up table (the capacitance when contacting the human skin and metal on the touch keypad is different). The ADC data of capacitance value or voltage level appearing at the time must be secured in advance.

Baseband chipsets, such as MSM, can check the current state of the display of the terminal by checking the lookup table periodically.

Recently, in order to improve the electrostatic discharge (ESD) characteristics, a metallic material is coated on the transparent plastic surface directly above the main LCD module of the terminal. In this case, the present invention can be applied. When the display unit is closed and the touch pad and the metallic material are exactly overlapped with the above-described method, the touch pad itself has excellent ESD performance, so it also serves as a discharge path from the LCD surface to the touch keypad. There is an improvement effect.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail as follows.

Figure 2 is a plan view showing a safety device of a mobile terminal according to an embodiment of the present invention, as shown in the display unit 200 is coupled to the terminal body 100 so as to be open and close, the terminal body 100 In the mobile terminal having a touch keypad 110, a conductive touch sensing unit 300 for confirming contact with the touch keypad 110 on the contact surface in contact with the touch keypad 110 of the display unit 200. ) Is formed.

A metal surface 301 is used for the touch sensing unit 300, and as shown in FIG. 2, a plurality of metal surfaces 301 are formed on the display unit 200 (four in the drawing). .

The metal surface 301 may be provided with a metal foil, a metal layer, or other methods.

The mobile terminal of the type shown in FIG. 1 is a clamshell-type mobile terminal, the terminal main body 100 and the display unit 200 are hinged to be rotatable to be opened and closed, and as illustrated, the display unit with respect to the terminal main body 100. A touch keypad 110 is provided on an upper surface of the terminal body 100 on the basis of an open state of the terminal 200, and an LCD 210 is provided on an upper surface of the display unit 200. The elliptical metal surface 301 is provided on the upper surface of the LCD 210 around all sides.

3 is a plan view showing a safety device of a mobile terminal according to another embodiment of the present invention. In this embodiment, the contact sensing unit 300 uses an annular metal surface 302, and the annular metal surface. 302 and the touch keypad 110 is configured to be electrically connected to the connecting portion (310).

The annular metal surface 302 and the connection portion 310 may be provided with a metal foil, a metal layer, or other methods.

The mobile terminal of the type shown in FIG. 3 is also a clamshell type mobile terminal, the terminal main body 100 and the display unit 200 are hinged to be rotatable to be opened and closed, and as shown, the display unit with respect to the terminal main body 100. A touch keypad 110 is provided on an upper surface of the terminal body 100 on the basis of an open state of the terminal 200, and an LCD 210 is provided on an upper surface of the display unit 200. The upper surface of the annular metal surface 302 is formed around the LCD 210, the intermediate portion of the annular metal surface 302 and the touch keypad 110 is configured to be connected by a band-shaped connecting portion (310).

In the safety device of the mobile terminal according to the present invention, when the display unit 200 is closed on the terminal body 100, the sensor of the part in which the touch sensing unit 300 overlaps the touch keypad 110 is a key input function. At the same time, it functions to detect the opening and closing of the display unit 200, and a detection signal is input to the controller to recognize that the display unit 200 is closed.

In addition, the safety device of the mobile terminal according to another embodiment of FIG. 3 is a touch keypad 110 at a portion where the touch sensing unit 300 exactly overlaps the touch keypad 110 and the metallic material when the display unit 200 is closed. ) Itself is excellent in ESD performance, and also serves as a discharge path from the surface of the LCD 210 of the display unit 200 to the touch keypad 110, thereby improving the ESD performance of the terminal.

For example, when a momentary high voltage is applied to one upper edge of the LCD 210 of the display unit 200 in FIG. 3, the touch sensing unit 300 coated with a metal material around the LCD 210, and the touch sensing unit 300. Is transferred to the touch keypad 110 of the terminal body 100 through the connection portion 310 coated with a metal material between the touch keypad 110 and the GND of the lower receptacle 120 of the terminal body 100. Through discharge, ESD performance is improved.

As described above, the safety device of the mobile terminal removes the hall effect sensor, which is a universal device used as the opening / closing detection of the display unit, and utilizes a specific part of the existing touch keypad. Integrating the function of the sensor and the opening / closing detection function of the display unit eliminates the need for operating voltage 2.4 ~ 3.3V of the Hall effect sensor, reducing the current consumption of the terminal itself, increasing the waiting time, and adding various functions. It is also effective in allocating GPIO pins, and can reduce product costs, thereby securing price competitiveness in related markets and contributing to industrial development.

Claims (5)

The display unit 200 is coupled to the terminal body 100 so that the display unit 200 can be opened and closed, and in the mobile terminal having the touch keypad 110 in the terminal body 100, the touch keypad of the display unit 200 ( Safety device of a mobile terminal, characterized in that formed on the contact surface in contact with the touch-sensitive keypad 110 to form a conductive contact detection unit 300 for confirming contact. The safety of a mobile terminal according to claim 1, wherein the touch sensing unit 300 is formed by forming a plurality of metal surfaces 301 around the LCD 210 of the display unit 200 of the folding mobile terminal. Device. The safety of the mobile terminal according to claim 1, wherein the touch sensing unit 300 is formed by forming an annular metal surface 302 around the LCD 210 of the display unit 200 of the folding mobile terminal. Device. The display unit 200 is coupled to the terminal body 100 so that the display unit 200 can be opened and closed, and in the mobile terminal having the touch keypad 110 in the terminal body 100, the touch keypad of the display unit 200 ( A conductive contact sensing unit 300 is formed on the contact surface in contact with the touch panel 110 to confirm contact with the touch keypad 110, and the touch sensing unit 300 and the touch keypad 110 are connected to the connection unit 310. Safety device of a mobile terminal, characterized in that configured to be electrically connected. [5] The safety device of claim 4, wherein the touch sensing unit is formed in an annular shape around the LCD 210 of the display unit.

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