KR100570444B1 - Mobile communication terminal with function eradication of liquid crystal display noise - Google Patents

Abstract

The present invention is improved to a structure having a ground pin dedicated to the ground function only in the connector for connecting the signal line between the main printed circuit board and the LCD provided in the mobile communication terminal, and by this improved structure from the LCD It quickly absorbs and removes noise on incoming digital signals.

According to the present invention, a first ground pin is provided at a first connector connected to an LCD, and a second ground pin is provided at a second connector provided on a main printed circuit board so as to correspond to the first ground pin. In addition, a mobile communication terminal having an enhanced ground function of an LCD in which noise flowing from the LCD is absorbed and removed by the main printed circuit board by a combination of two ground pins is provided.

Terminal, Ground, Connect, Connect, Impact, Sensitivity, Connector

Description

Mobile Communication Terminal with Function Eradication of Liquid Crystal Display Noise}             

1 is a perspective view showing a general mobile communication terminal.

2 is a front sectional view showing a state in which a connector of an LCD side and a connector of a main printed circuit board side are separated in a typical mobile communication terminal.

FIG. 3 is a cross-sectional front view illustrating a state in which the LCD and the main printed circuit board of FIG. 2 are connected and connected.

Figure 4 is a front cross-sectional view showing a state separated between the LCD and the main printed circuit board each provided with a connector with enhanced ground function according to the present invention.

FIG. 5 is a front cross-sectional view illustrating a state in which a connection is coupled between the connector on the LCD side and the connector on the main printed circuit board side shown in FIG. 4.

* Explanation of Signs of Major Parts of Drawings *

10: mobile communication terminal 12: LCD

14: flexible printed circuit board 16, 30: the first connector

18: main printed circuit board 20, 32: second connector

22: first connector pin 24: second connector pin

26: bend 34: first ground pin

36,42: ground plate 38: second ground pin

40: bend

The present invention relates to a mobile communication terminal having a noise removing function of the LCD, and more particularly, a ground pin dedicated to the ground function is provided on a connector connected to each other to form a digital signal line between the main printed circuit board and the LCD. The structure is improved so that the noise of the digital signal flowing from the LCD is quickly absorbed and removed.

In general, a mobile communication terminal which is widely used is equipped with an LCD for visually showing various function display and usage status including various information data, and is connected to a main printed circuit board and a signal line for driving the LCD. Each of the connectors corresponding to each other is provided for such a signal connection.

1 and 2 are provided with a connector 16 on a flexible printed circuit board 14 connected to the LCD 12 of the mobile communication terminal 10, the main printed circuit board 18 is a second As a schematic view showing a state in which the connector 20 is provided, firstly, a plurality of first connector pins 22 are spaced from each other on both sides of the first connector 16 along the longitudinal direction of the first connector 16. It is composed of arranged arrangement structure.

In addition, a part of the first connector pin 22 is bent to protrude from the first connector 16, and both ends thereof have a structure connected to a corresponding line of the flexible printed circuit board 14.

In addition, a plurality of second connector pins 24 are arranged on both sides of the second connector 20 so as to correspond to the first connector pins 22, and a part of the second connector pins 24 is disposed from the second connector 20. It protrudes. In this case, an end portion of the second connector pin 24 is formed with a bent portion 26 that is curved downward while drawing a remnant line, and the other end has a structure connected to a signal line of the main printed circuit board 18.

When the first connector 16 and the second connector 20 are coupled to each other, as shown in FIG. 3, for the signal connection between the LCD 12 and the main printed circuit board 18 configured as described above, The first connector pins 22 are brought into contact with the corresponding second connector pins 24. At this time, the first connector pin 22 is inserted while pushing the bent portion 26 of the second connector pin 24 so that the bent portion 26 is further bent inwardly, and at the same time, the bent portion 26 is restored to the initial state. The first connector pin 22 is pressed by the holding force, so that the connection is of course firmly coupled. The signal applied from the main printed circuit board 18 by the connection coupling is applied through the first and second connector pins 22 and 24 to drive the LCD 12.

However, the structure of the conventional first and second connectors 16 and 20 merely takes a connection for connecting a signal line between the LCD 12 and the main printed circuit board 18, By not absorbing and eliminating the outflowing noise, that is, the electromagnetic wave for the digital signal, the electromagnetic wave adversely affects the signal radiation of the antenna of the mobile communication terminal 10, thereby causing a problem that the wireless sensitivity is lowered. If the wireless sensitivity is degraded due to this problem, for example, a problem may occur in which data is not correctly received or a voice signal is not correctly received from the other party.

In order to solve the above problems, some mobile communication terminals are grounded using an attachment (for example, a conductive tape or a conductive solution). However, the use of such attachments requires additional costs and is not easy. Has the problem of falling productivity.

Accordingly, the present invention has been proposed to solve the conventional problems as described above, by providing a ground pin dedicated to the ground function in each connector for connecting the signal line between the main printed circuit board and the LCD, in the LCD The purpose is to quickly absorb and remove incoming noise and thereby improve wireless sensitivity.

The present invention for achieving the above object is provided with a first ground pin on the first connector connected to the LCD, and the second ground pin to correspond to the first ground pin to the second connector provided on the main printed circuit board There is provided a technical feature of the mobile communication terminal having a function of removing the noise of the LCD noise is absorbed and removed from the LCD by the coupling of the first and second ground pins to the main printed circuit board.

 In addition, one end of the second ground pin is in contact with the first ground pin is formed as a curved downward downward curved line, a mobile communication having a function of removing the noise noise coupled to the bending force of the curved portion by the bending The terminal has technical features.

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

4 is a cross-sectional view schematically illustrating a separated state between a first connector provided on a flexible printed circuit board and a second connector provided on a main printed circuit board.

First, the flexible printed circuit board 14 is provided with the first connector 30 of the present invention, and the main printed circuit board 18 is provided with the second connector 32 to be connected and connected as described above.

The first ground pin 34 protrudes from both sides of the first connector 30 such that the first connector pin 22 is located inside. The first ground pin 34 is formed in the same shape as the first connector pin 22, and both ends thereof are connected to the ground plate 36 of the flexible printed circuit board 14 to be electrically conductive. .

On both sides of the second connector 32, the second ground pin 38 is disposed to protrude so that the second connector pin 24 is located inside. The second ground pin 38 is formed in the same shape as the second connector pin 24, the one end is formed of the bent portion 40 is bent downwards to form a remnant line, the other end of the main printed circuit board It has a structure connected to the ground plate 42 of (18).

In the accompanying drawings, the first and second connectors 30 and 32 are shown in cross section so that the first and second ground pins 34 and 38 are disposed on both outer sides of the first and second connector pins 22 and 24, respectively. Although shown to be, but in order to further strengthen the ground function, by placing the first and second ground pins 34 and 38 having the same structure in front and rear of the first and second connector pins 22 and 24, respectively, As seen from the above, the arrangement structure of the first and second ground pins 34 and 38 completely covering the outer peripheries of the first and second connector pins 22 and 24 will not be departed from the technical protection scope of the present invention.

However, the above arrangement is also a preferable example, and is not necessarily limited to this arrangement. For example, if the shape of the first and second connectors 30 and 32 or the arrangement structure of the first and second connector pins 22 and 24 are changed, the first and second ground pins 34 and 38 may be adjusted accordingly. It may be arranged in various ways. Therefore, when the first connector pin 22 of the first connector 30 and the second connector pin 24 of the second connector 32 are connected to each other and coupled to each other in the same manner as before, the first ground pin ( 34 is also coupled while pushing the bend 40 of the second ground pin 38.

When the connection between the first and second ground pins 34 and 38 is completed, as shown in FIG. 5, the bent portion 40 is further bent inwardly, and thus an elastic force is restored to the initial state. As the first ground pin 34 is hardened by the above, the first ground pin 34 is firmly connected to each other.

When the ground is connected as described above, for example, noise flowing from the CD 12 has conventionally affected the antenna signal radiation to reduce the wireless sensitivity, but in the present invention, the noise is the first and second ground pins 34 and 38. By absorbing and removing flows into the ground plate 42 of the main printed circuit board 18 through the antenna, the radiosensitivity is improved without affecting the radiation of the antenna signal.

Further, the connection between the first and second connectors 30 and 32 is basically maintained by the elastic force of the bent portion 40 of the second connector pin 24, but in addition, the second ground pin ( Grip force by the bent portion 40 of 38) is reinforced to further exert a function of further strengthening the connection coupling between the first and second connectors 30 and 32.

The present invention has a structure that is connected to each other by providing a ground pin to the connector used for connection connection between the LCD and the printed circuit board, respectively, to quickly absorb and remove the noise flowing from the LCD, and to quickly remove the noise by wireless There is an effect that can improve the sensitivity.

In addition, since the structure of the ground pin is simple, workability is easy, and thus, an effect of improving productivity and reducing costs can be expected.

In addition, by further strengthening the connection coupling between the connector by the connection between the ground pin, even if a strong impact is transmitted from the outside can be expected to prevent the separation between the connector.

Claims (2)

One or more first ground pins are provided on the first connector connected to the LCD, and the second ground pins are provided to correspond to the first ground pins on the second connector connected to the main printed circuit board. The mobile communication terminal of claim 2, wherein the noise flowing from the LCD is absorbed and removed to the main printed circuit board when the two ground pins are coupled to each other. The method of claim 1, One end of the second ground pin that is in contact with the first ground pin is formed with a curved downward downward curved line, with a noise removal function characterized in that coupled to the holding force by the bending of the curved portion. Mobile terminal.

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