KR100700014B1 - Flat Panel Display Device for inserting a guard - Google Patents

Abstract

Disclosed is a flat panel display apparatus in which a guard line is inserted into a flat panel display system unit, an FPCB, and a panel unit. As the guard lines are formed to surround the predetermined lines of the flat panel display system unit, the FPCB, and the panel unit, crosstalk and radiated electromagnetic interference are reduced, and electrical noise is eliminated.

Guard line, crosstalk, radiated electromagnetic interference, electrical noise

Description

Flat panel display device for inserting a guard}             

1 is a block diagram schematically illustrating a flat panel display device according to the related art.

2 is a view schematically illustrating a guard line in a panel portion of a flat panel display device according to a first embodiment of the present invention.

3 is a view schematically illustrating a guard line in an FPCB of a flat panel display according to a second exemplary embodiment of the present invention.

4 is a view schematically illustrating a guard line in a flat panel display system unit of a flat panel display according to a third embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat panel display device, and more particularly, to a flat panel display device in which a guard line is inserted to reduce crosstalk and radiated electromagnetic interference, thereby removing electrical noise.

In today's information society, the proportion of display is increasing day by day, and flat panel display is attracting attention as an information transmission medium in the information age and multimedia age. It is firmly positioned as a display device for desktop PC monitors and portable devices in place of the existing CRT, and is attracting attention in the liquid crystal display (LCD) and large digital TV markets for homes. Plasma display panels (PDPs) and organic electroluminescent displays (OLEDs), which are aiming at the market for liquid crystal displays due to various advantages coming from self-luminous, have been spotlighted as representative flat panel display devices.

1 is a block diagram schematically illustrating a flat panel display device according to the related art.

Referring to FIG. 1, the conventional flat panel display device 100 includes a flat panel display system 110, an FPCB 120, and a panel 130.

First, the flat panel display system unit 110 includes a power supply unit, a memory unit, a program unit, a buffer unit, and the like, and the flat panel display system unit 110 is connected to the panel unit 130 through the FPCB 120.

Next, the power supply unit of the flat panel display system unit 110 transmits a power supply voltage transmitted from an external source to a circuit unit such as a memory unit, a program unit, and a buffer unit embedded in the flat panel display system unit 110.

In addition, the power supply unit applies the power supply voltage to the scan driver and data driver provided in the panel unit 130 through the FPCB 120, and the power supply voltage applied to the scan driver and the data driver is the panel unit 130. The flat panel display mounted on the screen is delivered to be displayed.

Next, the FPCB 120 is disposed between the flat panel display system unit 110 and the panel unit 130 to supply the power voltage and the display operation signal transmitted from the flat panel display system unit 110 to the panel unit 130. To pass).

Here, the display operation signal is transmitted to the panel unit 130 through the FPCB 120 among signals generated by a circuit unit such as a power unit, a memory unit, a program unit, and a buffer unit embedded in the flat panel display system unit 110. Generic names of transmitted signals.

In general, the FPCB 120 is made of polyimide (PI), which stands for flexible flexible printed circuit board, and is developed as an electronic product developed according to the trend of compact and lightweight electronic products. This is excellent. In addition, since it has high heat resistance, bending resistance, chemical resistance, and heat resistance, it is a core component of all electronic products, such as cameras, computers and peripherals, hand phones, video and audio devices, camcorders, printers, DVDs, TFT LCDs, satellite equipment, military Widely used in equipment, medical equipment, etc.

That is, the FPCB 120 serves to connect the flat panel display system unit 110 and the panel unit 130 to each other.

Finally, the panel unit 130 transmits the power supply voltage and the display operation signal input through the FPCB 120 to the flat panel display device of the panel unit 130 so as to emit light.

Problems associated with the conventional flat panel display device related to the present invention and overcome by the present invention are as follows.

Predetermined lines formed in the flat panel display system unit, the FPCB, and the panel unit included in the flat panel display apparatus have a problem in that electrical noise increases due to crosstalk and electromagnetic interference caused by capacitive coupling during information transfer. .

In order to solve this problem, a predetermined line formed in the flat panel display system unit, the FPCB, and the panel unit included in the flat panel display device must suffer from a problem that a guard line surrounds the predetermined line.

An object of the present invention is to provide a flat panel display device in which a guard line is added to a signal line or a power line provided in the flat panel display system unit, the FPCB, or the panel unit.

According to a first embodiment of the present invention, a power supply voltage and a display operating signal are generated. A panel unit including at least one guard line so as to surround at least one or more lines to which the power voltage and the display operation signal transmitted from the flat panel display system are input, and to display a predetermined screen; And an FPCB connecting the flat panel display system unit to the panel unit and transferring a power supply voltage and a display operation signal transmitted from the flat panel display system unit to the panel unit.

According to a second aspect of the present invention, there is provided a flat panel display system including: a power supply voltage and a display operation signal; A panel unit including a flat panel display device configured to receive a power supply voltage and a display operation signal transmitted from the flat panel display system unit and display a predetermined screen; And a FPCB connecting the flat panel display system unit to the panel unit and having at least one guard line inserted to surround at least one or more lines to which the power supply voltage and the display operation signal transmitted from the flat panel display system unit are input. Provide the device.

According to a third embodiment of the present invention, a flat panel display system unit includes at least one guard line inserted to surround at least one or more lines through which a generated power supply voltage and a display operation signal are input; A panel unit including a flat panel display device configured to receive a power supply voltage and a display operation signal transmitted from the flat panel display system unit and display a predetermined screen; And an FPCB connecting the flat panel display system unit to the panel unit and transferring a power supply voltage and a display operation signal transmitted from the flat panel display system unit to the panel unit.

According to another aspect of the present invention, there is provided a display device including: a flat panel display system in which at least one guard line is inserted to surround at least one line into which a generated power supply voltage and a display operation signal are input; A panel unit including at least one guard line so as to surround at least one or more lines to which the power voltage and the display operation signal transmitted from the flat panel display system are input, and to display a predetermined screen; And a FPCB connected to the flat panel display system unit and the panel unit and having at least one guard line inserted to surround at least one or more lines to which the power supply voltage and the display operation signal transmitted from the flat panel display system unit are input. Provide a display device.

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

2 is a view schematically illustrating a guard line in a panel portion of a flat panel display device according to a first embodiment of the present invention.

Referring to FIG. 2, the flat panel display 200 includes a flat panel display system 210, an FPCB 220, and a panel 230. That is, the flat panel display system unit 210 includes a first connector CN1 connected to the FPCB 220, and the panel unit 230 includes a second connector CN2 connected to the FPCB 220. It is provided. In addition, the panel 230 includes a data driver, a scan driver, and a pixel unit.

The flat panel display device included in the pixel unit of the panel unit 230 is displayed by applying the supply voltages ELVDD and ELVSS. In addition, the panel unit 230 applies a display operation signal for driving the data driver and the scan driver. Accordingly, the panel unit 230 has a predetermined value around the lines of the power supply voltages ELVDD, ELVSS and display operation signals in order to suppress crosstalk and radiation-EMI, which are electrical interference phenomena. Insert the guard line.

That is, the guard line is formed of an electrically conductive material and can be installed on all of the lines formed in the panel unit 230. In addition, the guard line is inserted in a form surrounding the ELVDD and ELVSS lines, which are the power voltages formed in the panel unit 230 of the flat panel display device 200, and the display operation signal line. The guard line is then formed by grounding (GND) to reduce the crosstalk and radiated electromagnetic interference.

In this case, the conductive material refers to an object that is good at electricity or heat, and includes silver, copper, iron, aluminum, and alloys thereof.

A more detailed description of the guard line inserted into the panel of the flat panel display device according to the present invention is as follows.

The flat panel display 200 receives the corresponding information including the power supply voltage and the display operation signal through predetermined lines formed in the flat panel display system 210, the FPCB 220, and the panel 230. do.

That is, the predetermined lines are connected to each other so that the corresponding information is received so that the flat panel display device provided in the panel unit 230 of the flat panel display apparatus 200 is displayed. Accordingly, the power supply voltages ELVDD and ELVSS lines and display operation signal lines generate crosstalk and radiated electromagnetic interference. In order to solve the problems caused by the crosstalk and radiation electromagnetic interference, a guard line is inserted and formed to surround the periphery of the ELVDD and ELVSS lines and the display operation signal line. Accordingly, the mutual capacitance Cm generated between the power supply voltages ELVDD and ELVSS lines and the display operation signal line is reduced due to the guard line insertion. That is, the mutual capacitances Cm1 and Cm2 formed by the insertion of the guard line form a value smaller than the mutual capacitance Cm in which the guard line is not provided as shown in [Equation 1].

As shown in Equation 1, insertion of the guard line reduces crosstalk due to capacitive coupling. In addition, external electromagnetic interference is suppressed and electrical noise is suppressed.

3 is a view schematically illustrating a guard line in an FPCB of a flat panel display according to a second exemplary embodiment of the present invention.

Referring to FIG. 3, the flat panel display 200 includes a flat panel display system 210, an FPCB 220, and a panel 230. That is, the flat panel display system unit 210 includes a first connector CN1 connected to the FPCB 220, and the panel unit 230 includes a second connector CN2 connected to the FPCB 220. It is provided. In addition, the panel unit 230 includes a data driver, a scan driver, and a pixel unit.

The FPCB 220 is disposed between the flat panel display system 210 and the panel 230, and is a power supply voltage ELVDD and ELVSS transmitted from the flat panel display system 210 to the pixel unit of the panel 230. And a display operation signal for driving the data driver and the scan driver of the panel 230. Accordingly, the FPCB 220 has a predetermined guard line around the power supply voltages ELVDD, ELVSS, and display operation signal lines to suppress electrical interference, crosstalk and radiation-EMI. Insert a (guard line).

That is, the guard line is formed of a conductive material through which electricity is well communicated, and can be installed in all lines formed in the FPCB 220. In addition, the guard line is inserted in a form surrounding the ELVDD and ELVSS lines, which are the power voltages formed in the FPCB 220 of the flat panel display 200, and the display operation signal line. The guard line is then formed by grounding (GND) to reduce the crosstalk and radiated electromagnetic interference.

In this case, the conductive material refers to an object that is good at electricity or heat, and includes silver, copper, iron, aluminum, and alloys thereof.

A more detailed description of the guard line inserted into the FPCB of the flat panel display device according to the present invention is as follows.

The flat panel display 200 receives the corresponding information including the power supply voltage and the display operation signal through predetermined lines formed in the flat panel display system 210, the FPCB 220, and the panel 230. do.

That is, the predetermined line serves to connect the flat panel display system 210 and the panel 230 to each other through the FPCB 220 of the flat panel display 200. Accordingly, the power supply voltages ELVDD and ELVSS lines and display operation signal lines generate crosstalk and radiated electromagnetic interference. In order to solve the problems caused by the crosstalk and radiated electromagnetic interference, the guard line is inserted and formed to surround the periphery of the ELVDD and ELVSS lines and the display operation signal line. Accordingly, the mutual capacitance Cm generated between the power supply voltages ELVDD and ELVSS lines and the display operation signal line is reduced due to the guard line insertion. That is, the mutual capacitances Cm1 and Cm2 formed by the insertion of the guard line form a value smaller than the mutual capacitance Cm to which the guard line is not provided, as shown in [Equation 1].

[Equation 1]

As shown in Equation 1, insertion of the guard line reduces crosstalk due to capacitive coupling. In addition, external electromagnetic interference is suppressed and electrical noise is suppressed.

4 is a view schematically illustrating a guard line in a flat panel display system unit of a flat panel display according to a third embodiment of the present invention.

Referring to FIG. 4, the flat panel display apparatus 200 includes a flat panel display system unit 210, an FPCB 220, and a panel unit 230, that is, the flat panel display system unit 210 includes the FPCB. A first connector CN1 connected to the 220 is provided, and the panel unit includes a second connector CN2 connected to the FPCB 220. In addition, the flat panel display system 210 generates display operation signals for driving the power voltages ELVDD and ELVSS and the data driver and scan driver of the panel 230.

Accordingly, a guard line is provided around the power supply voltages ELVDD, ELVSS, and an operation signal line to suppress crosstalk and radiation-EMI, which are electric interference phenomena. Is inserted.

That is, the guard line is formed of an electrically conductive material, and can be installed on all lines formed in the flat panel display system 210. In addition, the guard line is inserted in a form surrounding the ELVDD and ELVSS lines, which are the power voltages generated by the flat panel display system 210 of the flat panel display device 200, and the display operation signal line. The guard line is then formed by grounding (GND) to reduce the crosstalk and radiated electromagnetic interference.

In this case, the conductive material refers to an object that is good at electricity or heat, and includes silver, copper, iron, aluminum, and alloys thereof.

A more detailed description of the guard line inserted into the flat panel display system unit of the flat panel display device is as follows.

The flat panel display 200 displays corresponding information including the power supply voltage and the display operation signal through predetermined lines formed in the flat panel display system 210, the FPCB 220, and the panel 230. Receive.

That is, the predetermined lines are connected to each other such that the power voltage and the display operation signal generated by the flat panel display system unit 210 of the flat panel display device 200 are transmitted to the panel unit 230 through the FPCB 210. do. Accordingly, the power supply voltages ELVDD and ELVSS lines and display operation signal lines generate crosstalk and radiated electromagnetic interference. In order to solve the problems caused by the crosstalk and radiated electromagnetic interference, a guard line is inserted and formed to surround the periphery of the ELVDD and ELVSS lines and the display operation signal line. Therefore, the mutual capacitance Cm generated between the power supply voltages ELVDD and ELVSS lines and the display operation signal line is reduced due to the insertion of the guard line. That is, the mutual capacitances Cm1 and Cm2 formed by the insertion of the guard line form a value smaller than the mutual capacitance Cm to which the guard line is not provided, as shown in [Equation 1].

[Equation 1]

As shown in Equation 1, insertion of the guard line reduces crosstalk due to capacitive coupling. In addition, external electromagnetic interference is suppressed and electrical noise is suppressed.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

According to the present invention described above, the flat panel display device has an effect of removing electrical noise by inserting a guard line into a predetermined line to reduce crosstalk and radiated electromagnetic interference.

Claims (20)

A flat panel display system unit generating a power supply voltage and a display operation signal; A panel unit including at least one guard line so as to surround at least one or more lines to which the power voltage and the display operation signal transmitted from the flat panel display system are input, and to display a predetermined screen; And And an FPCB connecting the flat panel display system unit to the panel unit and transferring a power supply voltage and a display operation signal transmitted from the flat panel display system unit to the panel unit. The flat panel display of claim 1, wherein the guard lines are inserted to surround each of the lines formed in the panel unit. The flat panel display of claim 1, wherein the guard line is a conductive material. The flat panel display of claim 3, wherein the conductive material is one selected from copper, iron, aluminum, and alloys thereof. The flat panel display of claim 1, wherein the guard line is grounded. A flat panel display system unit generating a power supply voltage and a display operation signal; A panel unit including a flat panel display device configured to receive a power supply voltage and a display operation signal transmitted from the flat panel display system unit and display a predetermined screen; And A flat panel display device (FPCB) which connects the flat panel display system unit to the panel unit and has at least one guard line inserted therein to surround at least one or more lines to which a power supply voltage and a display operation signal transmitted from the flat panel display system unit are input; . The flat panel display of claim 6, wherein the guard lines are inserted to surround each of the lines formed in the FPCB. The flat panel display of claim 6, wherein the guard line is a conductive material. The flat panel display of claim 8, wherein the conductive material is formed of silver, copper, iron, aluminum, and alloys thereof. The flat panel display of claim 6, wherein the guard line is grounded. A flat panel display system unit in which at least one guard line is inserted to surround at least one line into which the generated power supply voltage and the display operation signal are input; A panel unit including a flat panel display device configured to receive a power supply voltage and a display operation signal transmitted from the flat panel display system unit and display a predetermined screen; And And an FPCB connecting the flat panel display system unit to the panel unit and transferring a power supply voltage and a display operation signal transmitted from the flat panel display system unit to the panel unit. 12. The flat panel display of claim 11, wherein the guard lines are inserted to surround each of the lines connecting the circuit units embedded in the flat panel display system unit to each other. The flat panel display of claim 11, wherein the guard line is a conductive material. The flat panel display of claim 13, wherein the conductive material is one selected from copper, iron, aluminum, and alloys thereof. The flat panel display of claim 11, wherein the guard line is grounded. A flat panel display system unit in which at least one guard line is inserted to surround at least one line into which the generated power supply voltage and the display operation signal are input; A panel unit including at least one guard line so as to surround at least one or more lines to which the power voltage and the display operation signal transmitted from the flat panel display system are input, and to display a predetermined screen; And A flat panel display device (FPCB) which connects the flat panel display system unit to the panel unit and has at least one guard line inserted therein to surround at least one or more lines to which a power supply voltage and a display operation signal transmitted from the flat panel display system unit are input; . The flat panel display of claim 16, wherein the guard lines are inserted to surround each of the lines formed in the flat panel display system unit, the panel unit, and the FPCB. The flat panel display of claim 16, wherein the guard line is a conductive material. The flat panel display of claim 18, wherein the conductive material is one selected from copper, iron, aluminum, and alloys thereof. The flat panel display of claim 16, wherein the guard line is grounded.

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