KR100505988B1 - Film Type Filter for Plasma Display Panel - Google Patents

Abstract

The present invention relates to a film type front filter of a plasma display panel capable of providing a stable ground irrespective of thermal expansion.

The film type front filter of the plasma display panel of the present invention provides an effective connection portion connected to an effective display portion of a panel on which an image is displayed, an invalid connection portion connected to an area other than the effective display portion of the panel, and an expansion space on the invalid connection portion. In order to achieve this, at least one cutout is formed on the invalid connection portion.

Description

Film Type Filter for Plasma Display Panel

The present invention relates to a film type front filter of a plasma display panel, and more particularly, to a film type front filter of a plasma display panel capable of providing a stable ground irrespective of thermal expansion.

Plasma Display Panels (hereinafter referred to as "PDPs") are characterized by emitting phosphors by 147 nm ultraviolet rays generated during discharge of an inert mixed gas such as He + Xe, Ne + Xe or He + Ne + Xe. An image containing graphics is displayed. Such a PDP is not only thin and easy to enlarge, but also greatly improved in quality due to recent technology development. In particular, the three-electrode AC surface discharge type PDP has advantages of low voltage driving and long life because wall charges are accumulated on the surface during discharge and protect the electrodes from sputtering caused by the discharge.

1 is a perspective view illustrating a discharge cell structure of a conventional plasma display panel.

Referring to FIG. 1, a discharge cell of a three-electrode AC surface discharge type PDP includes a scan electrode Y and a sustain electrode Z formed on the upper substrate 10, and an address electrode formed on the lower substrate 18. X). Each of the scan electrode Y and the sustain electrode Z has a line width smaller than the line widths of the transparent electrodes 12Y and 12Z and the transparent electrodes 12Y and 12Z and is formed at one edge of the transparent electrode 13Y, 13Z).

The transparent electrodes 12Y and 12Y are usually formed on the upper substrate 10 by indium tin oxide (ITO). The metal bus electrodes 13Y and 13Z are usually formed of metals such as chromium (Cr) and formed on the transparent electrodes 12Y and 12Z to reduce voltage drop caused by the transparent electrodes 12Y and 12Z having high resistance. The upper dielectric layer 14 and the passivation layer 16 are stacked on the upper substrate 10 having the scan electrode Y and the sustain electrode Z side by side. In the upper dielectric layer 14, wall charges generated during plasma discharge are accumulated. The protective layer 16 prevents damage to the upper dielectric layer 14 due to sputtering generated during plasma discharge and increases emission efficiency of secondary electrons. As the protective film 16, magnesium oxide (MgO) is usually used.

The lower dielectric layer 22 and the partition wall 24 are formed on the lower substrate 18 on which the address electrode X is formed, and the phosphor layer 26 is coated on the surfaces of the lower dielectric layer 22 and the partition wall 24. The address electrode X is formed in the direction crossing the scan electrode Y and the sustain electrode Z. The partition wall 24 is formed in a stripe or lattice shape to prevent the ultraviolet rays and the visible light generated by the discharge from leaking to the adjacent discharge cells. The phosphor layer 26 is excited by ultraviolet rays generated during plasma discharge to generate visible light of any one of red, green, and blue. Inert mixed gas is injected into the discharge space provided between the upper and lower substrates 10 and 18 and the partition wall 24.

The PDP is time-divisionally driven by dividing one frame into several subfields having different number of emission times in order to implement grayscale of an image. Each subfield is divided into an initialization period for initializing the full screen, an address period for selecting a scan line and selecting a cell in the selected scan line, and a sustain period for implementing gray levels according to the number of discharges.

For example, when the image is to be displayed with 256 gray levels, as shown in FIG. 2, the frame period (16.67 ms) corresponding to 1/60 second is divided into eight subfields SF1 to SF8. As described above, each of the eight subfields SF1 to SF8 is divided into an initialization period, an address period, and a sustain period. The initialization period and the address period of each subfield are the same for each subfield, while the sustain period is increased at a rate of 2 ⁿ (n = 0,1,2,3,4,5,6,7) in each subfield. .

The front filter is installed on the upper substrate 10 of the PDP driven as described above to shield electromagnetic waves and prevent reflection of external light.

3 is a cross-sectional view schematically illustrating one side of a conventional plasma display panel.

Referring to FIG. 3, a conventional PDP includes a panel 32 formed by joining an upper substrate 10 and a lower substrate 18, a front filter 30 installed on a front surface of the panel 32, and a panel ( 32, a printed circuit board 36 installed to be attached to the heat sink 34, a back cover 38 formed to surround the back of the PDP, and the front filter 30. And a filter support portion 40 for connecting the bag cover 38 and a support member 42 provided between the front filter 30 and the bag cover 38 so as to surround the filter support portion 40.

The printed circuit board 36 supplies a driving signal to the electrodes of the panel 32. To this end, the printed circuit board 36 includes various driving units not shown. The panel 32 displays a predetermined image in response to a drive signal supplied from the printed circuit board 36. The heat sink 34 dissipates heat generated from the panel 32 and the printed circuit board 36. The back cover 38 protects the panel 32 from external shocks and blocks electromagnetic waves emitted to the rear surface (hereinafter referred to as "EMI").

The filter support 40 electrically connects the front filter 30 to the bag cover 38. Such a filter support 40 grounds the front filter 30 to the bag cover 38 and prevents EMI from being emitted to the side. The support member 42 supports the filter support 40, the front filter 30, the bag cover 38, and the like.

The front filter 30 shields EMI and prevents reflection of external light. To this end, the front filter 30 is an antireflective film 50, an optical film 52, a glass 54, a near infrared (NIR) shielding film 56 and an EMI shielding film as shown in FIG. 58 is provided. Here, in practice, an adhesive layer is formed between the films 50, 52, 54, 56, 58 of the front filter 30 to bond the films 50, 52, 54, 56, 58. In general, the optical film 52 is formed by inserting a specific material into the adhesive layer. Then, the structure of the front filter 30 is slightly changed depending on the manufacturer. For convenience of description, the adhesive layer is not illustrated, and the optical film 52 is represented as a specific layer, and the structure of the front filter 30 which is generally used is exemplified.

The antireflection coating 50 prevents light incident from the outside from being reflected back to the outside to improve the contrast of the PDP. The antireflective film 50 is formed on the surface of the front filter 30.

The optical characteristic film 52 improves the optical characteristics of the PDP by lowering the transmittance of red (R) and green (G) and increasing the transmittance of blue (B) among the light incident from the panel 32.

The glass 54 prevents the front filter 30 from being damaged from an external impact. In other words, the glass 54 supports the front filter 30 to prevent the front filter 30 from being damaged from an external impact.

The NIR shielding film 56 shields the NIR emitted from the panel 32 so that signals that transmit a specific command using the N IR, such as a remote control, can be normally transmitted. In other words, the NIR shielding film 56 prevents the NIR above the reference from being emitted to the outside.

The EMI shielding film 58 shields the EMI to prevent the EMI incident from the panel 32 from being emitted to the outside.

The front filter 30 configured as described above is provided to be spaced apart from the panel 32 by a predetermined distance. In addition, in the conventional front filter 30, the glass 54 is used to prevent the front filter 30 from being damaged by an impact from the outside. However, when the glass 54 is inserted into the front filter 30 in this way, the thickness of the front filter 30 becomes thick. In addition, when the glass 54 is inserted into the front filter 30, the weight becomes heavy and the manufacturing cost increases.

In order to overcome such disadvantages, a film type front filter 60 having the glass 54 removed as shown in FIG. 5 has been proposed. The film type front filter 60 includes an antireflection film 62, an optical characteristic film 64, an NIR shielding film 66, and an EMI shielding film 68. Here, an adhesive layer is formed between the films 62, 64, 66, and 68 of the film type front filter 60 to bond the films between the films 62, 64, 66, and 68. The EMI shielding film 68 and the panel are also bonded by an adhesive layer (not shown). In other words, the film type front filter 60 is adhered to be fixed on the panel 32.

On the other hand, in general, the optical film 64 is formed by inserting a specific material in the adhesive layer. In addition, the structure of the film-type front filter 60 is slightly changed depending on the company used. For convenience of description, the adhesive layer is not illustrated and the optical characteristic film 64 is represented as a specific layer.

The antireflective film 62 is formed on the surface of the film type front filter 60 to prevent the light incident from the outside from being reflected back to the outside.

The optical characteristic film 64 adjusts the red (R) green (G) and blue (B) light balance among the light incident from the panel 32 and improves the color purity of the red (R) to improve the optical characteristics of the PDP. .

The NIR shielding film 66 shields the NIR incident from the panel 32. The NIR shield 66 prevents the NIR above the reference from being emitted to the outside so that signals transmitted from the remote controller or the like to the panel 32 can be normally transmitted.

The EMI shielding film 68 shields the EMI to prevent the EMI incident from the panel 32 from being emitted to the outside.

Such a film type front filter 60 has an advantage that the film is lighter and thinner than the front filter 30 including the glass 54. In addition, the film type front filter 60 may reduce the manufacturing cost compared to the front filter 30 including the glass 54.

However, since the film front filter 60 is installed to be in direct contact with the panel 32, the film front filter 60 must have a thermal strain corresponding to the thermal strain of the panel 32. In other words, the film type front filter 60 must stably maintain adhesion under various conditions (0 ° C. or less, 50 ° C. or more) in which the panel 32 (ie, glass) can be used. However, the conventional film type front filter 60 has a problem that it cannot maintain the adhesive stably with the panel 32 because the film front filter 60 has a heat distortion amount different from that of the panel 32.

This will be described in detail as follows. First, the film type front filter 60 is generally divided into an effective connection part 70 connected to an effective screen and an invalid connection part 72 connected to an effective screen as shown in FIG. 6.

The effective connection part 60 is a part connected to the effective display part of the panel 32 in which a predetermined image is displayed, and has a multilayered structure as shown in FIG. The invalid connection portion 72 is a portion that is connected to the invalid display portion of the panel 32 on which an image is not displayed, and is composed only of the EMI shielding film 68 in the structure of FIG. In fact, the invalid connection portion 72 is a portion that is connected to the filter support portion 40 to provide the ground to the EMI shield film 68.

In addition, the EMI shield 68 has a different structure depending on the installation position. In other words, the EMI shielding film 68 is divided into an EMI shield 76 positioned at the effective connection 70 and an EMI ground portion 74 positioned at the invalid connection 72 as shown in FIG.

The EMI blocking unit 76 blocks the EMI supplied from the panel 32 and is formed in a mesh form so that visible light supplied from the panel 32 can be emitted to the outside. The EMI ground 74 is stably connected to the filter support 40 and is formed in a planar shape to effectively provide ground. In general, the EMI shielding film 68 is formed of a metal such as copper. The EMI shield film 68 is connected to the panel 32 by the adhesive layer 78 as shown in FIG. 8.

Here, the panel 32 has a coefficient of thermal expansion of approximately 8PPM / ° C. The adhesive layer 78 has a thermal expansion coefficient of approximately 15 PPM / ° C to several hundred PPM / ° C, and the EMI shielding film 68 has a thermal window coefficient of approximately 16.5 PPM / ° C (when formed of copper). That is, the EMI shield film 68 has a coefficient of thermal expansion different from that of the adhesive layer 78 and the panel 32. Therefore, when the panel 32 is driven under various conditions (0 ° C. or less, 50 ° C. or more), wrinkles 80 are generated in the EMI ground portion 74 of the EMI shielding film 68 as shown in FIGS. 9A and 9B. There is a problem. As the wrinkles 80 are generated in the EMI ground portion 74 as described above, cracks are generated in the EMI shield portion 76 formed in the mesh form as shown in FIG. 10. That is, the conventional film type front filter 60 has a problem in that it is difficult to provide stable grounding and deterioration occurs in the effective display portion of the panel due to the crack of the EMI shield 76.

Accordingly, an object of the present invention is to provide a film type front filter of a plasma display panel capable of providing a stable ground irrespective of thermal expansion.

In order to achieve the above object, the film type front filter of the plasma display panel of the present invention includes an effective connection part connected to an effective display part of a panel on which an image is displayed, an invalid connection part connected to an area other than the effective display part of the panel, and an invalid effect. In order to provide an expansion space in the connection portion is provided with at least one cut portion formed in the invalid connection.

The cut portion has a triangular shape that narrows from the outside to the effective connection portion.

The cut portion has a rectangular shape.

The cut portion has a trapezoidal shape that narrows from the outside to the effective connection portion.

The cut portion has a semicircular shape that narrows toward the effective connection portion from the outside.

The effective connection unit includes an anti-reflective film to prevent light incident from the outside from being re-emitted to the outside, an optical characteristic film to adjust the balance of light emitted from the panel to the outside, and to block near-infrared light emitted from the panel to the outside. And a near-infrared (NIR) shielding film for shielding, and an electromagnetic shielding (EMI) shielding film for shielding electromagnetic waves emitted from the panel to the outside.

The invalid connection portion includes only an electromagnetic shielding film.

The film-type front filter of the plasma display panel of the present invention is connected to the effective display unit of the panel and formed in a mesh shape so that light supplied from the panel can be emitted to the outside, and other than the effective display unit of the panel. An electromagnetic grounding portion connected to the area for providing grounding to the electromagnetic wave shielding portion, and at least one cut portion formed at the electromagnetic grounding portion for providing an expansion space to the electromagnetic grounding portion.

The electromagnetic grounding portion is formed in a planar shape to provide a stable ground.

The cut portion has a triangular shape that narrows from the outside to the effective connection portion.

The cut portion has a rectangular shape.

The cut portion has a trapezoidal shape that narrows from the outside to the effective connection portion.

The cut portion has a semicircular shape that narrows toward the effective connection portion from the outside.

Other objects and features of the present invention in addition to the above objects will become apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 11 to 15.

11 is a view showing a film type front filter according to the first embodiment of the present invention. When describing FIG. 11, the same parts as the prior art of the present application will be described with reference to the drawings of the prior art.

Referring to FIG. 11, the film type front filter 90 according to the first embodiment of the present invention has an effective connection portion 92 connected to an effective display portion of a panel (not shown) and a ratio connected to an area other than the effective display portion of the panel. The effective connection part 94 is provided.

The effective connection portion 92 is connected to the effective display portion of the panel where a predetermined image is displayed. The effective connection portion 92 of the front filter 90 connected to the effective display portion of the panel includes an antireflection film 62, an optical characteristic film 64, an NIR shielding film 66, and an EMI shielding film 68 as shown in FIG. . In practice, an adhesive layer is formed between the films 62, 64, 66 and 68 to bond the films 62, 64, 66 and 68. The EMI shield film 68 and the panel are also bonded by the adhesive layer.

The antireflective film 62 prevents light incident from the outside from being reflected back to the outside, thereby improving the contrast of the PDP. The optical film 64 adjusts the light balance of red (R), green (G), and blue (B) among the light emitted from the panel to the outside, and increases the color purity of the red (R) to improve the optical properties of the PDP. Improve. The NIR shielding film 66 shields the NIR emitted from the panel to the outside. The EMI shield film 68 shields EMI emitted from the panel to the outside. Here, the NIR shield 66 and the EMI shield 68 may be composed of one layer.

The invalid connection portion 94 is connected to an area other than the effective display portion of the panel where no image is displayed. The invalid connection portion 94 of the front filter 90 connected to an area other than the effective display portion of the panel includes only the EMI shielding film 68. In other words, since the invalid connection portion 94 does not receive visible light from the panel, the NIR shielding film 66, the optical characteristic film 64, and the non-reflective film 62 are not formed. In practice, the invalid connection 94 of the front filter 90 is connected to a filter support, not shown, to provide ground to the EMI shield 68. In other words, the invalid connection portion 94 is electrically connected to a back cover (not shown) via the filter support portion.

On the other hand, the EMI shielding film 68 is formed to have a different structure from each other in the effective connection portion 92 and the invalid connection portion 94. In other words, the EMI shield 68 is divided into an EMI shield 76 formed in a mesh form and an EMI ground portion 74 formed in a plane form as shown in FIG. 7.

The EMI shield 76 is formed in a mesh form to emit light supplied from the panel to the outside. The EMI ground portion 74 is formed in a planar shape to stably provide ground to the EMI shield 76.

In this first embodiment of the present invention, the invalid connection portion 94 (or the EMI ground portion 74) includes at least one cut portion 96. The cut portion 96 is formed in a triangular structure that narrows toward the effective connecting portion 92 from the outside. Here, the cut portion 96 provides a predetermined space in which the invalid connection portion 94 can be expanded. In detail, since the EMI shielding film 68, which is usually formed of copper, has a coefficient of thermal expansion different from that of the panel and the adhesive layer positioned between the panel and the EMI shielding film 68, the panel may be subjected to various conditions (below 0 ° C and above 50 ° C). When driven, wrinkles 80 are generated as shown in FIGS. 9A and 9B. However, in the present invention, by providing the cut portion 96 in the invalid connection portion 94 to provide a stable ground when the panel is driven under a variety of conditions. In other words, since the cutout 96 provides a space in which the invalid connection portion 94 can be expanded, wrinkles 80 are not generated as in the prior art. In practice, the invalid connection 94 of the present invention provides stable grounding as shown in FIG. 12 even when the panel is driven under various conditions (0 ° C. or less, 50 ° C. or more). On the other hand, the cutout portion 96 is formed by cutting the invalid connection portion 94.

13 is a view showing a film type front filter according to a second embodiment of the present invention.

Referring to FIG. 13, the film type front filter 90 according to the second embodiment of the present invention includes an effective connection portion 92 connected to an effective display portion of a panel and an invalid connection portion connected to an area other than the effective display portion of the panel. 94 is provided. Here, the structure of the effective connecting portion 92 and the structure of the invalid connecting portion 94 are the same as in the first embodiment of the present invention. In other words, the anti-reflection film 62, the optical characteristic film 64, the NIR shielding film 66, and the EMI shielding film 68 are formed in the effective connection part 92. In addition, only the EMI shielding film 68 is formed in the invalid connection part 94. FIG.

Here, the EMI shielding film 68 (that is, the EMI shield 76) provided in the effective connecting portion 92 is formed in a mesh shape so that the visible light supplied from the panel is emitted to the outside, and to the invalid connection 94 The installed EMI shielding film 68 (ie, EMI grounding 74) is formed in the shape of a plane to provide grounding to the EMI shielding 76.

In the second embodiment of the present invention, the invalid connection portion 94 (or the EMI ground portion 74) includes at least one cut portion 98. Such a cut 98 is formed in a rectangular shape. Here, the cutout 98 provides a predetermined space in which the invalid connection 94 can be expanded. In other words, when the panel is driven under various conditions (less than or equal to 0 ° C. and greater than or equal to 50 ° C.), the invalid connection portion 94 is expanded using the space of the cut portion 98, so that the ground can be stably provided.

14 is a view showing a film type front filter according to a third embodiment of the present invention.

Referring to Fig. 14, the film type front filter 90 according to the third embodiment of the present invention has an effective connection portion 92 connected to the effective display portion of the panel, and an invalid connection portion connected to an area other than the effective display portion of the panel. 94 is provided. Here, the structure of the effective connecting portion 92 and the structure of the invalid connecting portion 94 are the same as in the first embodiment of the present invention. In other words, the anti-reflection film 62, the optical characteristic film 64, the NIR shielding film 66, and the EMI shielding film 68 are formed in the effective connection part 92. In addition, only the EMI shielding film 68 is formed in the invalid connection part 94. FIG.

Here, the EMI shielding film 68 (that is, the EMI shield 76) provided in the effective connecting portion 92 is formed in a mesh shape so that the visible light supplied from the panel is emitted to the outside, and to the invalid connection 94 The installed EMI shielding film 68 (ie, EMI grounding 74) is formed in the shape of a plane to provide grounding to the EMI shielding 76.

In the third exemplary embodiment of the present invention, the invalid connection portion 94 (or the EMI ground portion 74) includes at least one cut portion 100. The cut portion 100 is formed in a trapezoidal shape that narrows from the outside to the effective connection portion 92. Here, the cutout 100 provides a predetermined space in which the invalid connection portion 94 can be expanded. In other words, when the panel is driven under various conditions (0 ° C. or less, 50 ° C. or more), the invalid connection portion 94 is expanded using the space of the cut part 100, thereby stably providing a ground.

15 is a view showing a film type front filter according to a fourth embodiment of the present invention.

Referring to FIG. 15, the film type front filter according to the fourth embodiment of the present invention has an effective connection portion 92 connected to an effective display portion of a panel, and an invalid connection portion 94 connected to an area other than the effective display portion of the panel. It is provided. Here, the structure of the effective connecting portion 92 and the structure of the invalid connecting portion 94 are the same as in the first embodiment of the present invention. In other words, the anti-reflection film 62, the optical characteristic film 64, the NIR shielding film 66, and the EMI shielding film 68 are formed in the effective connection part 92. In addition, only the EMI shielding film 68 is formed in the invalid connection part 94. FIG.

Here, the EMI shielding film 68 (that is, the EMI shield 76) provided in the effective connecting portion 92 is formed in a mesh shape so that the visible light supplied from the panel is emitted to the outside, and to the invalid connection 94 The installed EMI shielding film 68 (ie, EMI grounding 74) is formed in the shape of a plane to provide grounding to the EMI shielding 76.

In the fourth embodiment of the present invention, the invalid connection portion 94 (or the EMI ground portion 74) includes at least one cut portion 102. The cut portion 102 is formed in a semicircular shape that narrows toward the effective connecting portion 92 from the outside. Here, the cutout 102 provides a predetermined space in which the invalid connection 94 can be expanded. In other words, when the panel is driven under various conditions (0 ° C. or less, 50 ° C. or more), the invalid connection portion 94 may be expanded using the space of the cut portion 102, thereby stably providing a ground.

As described above, according to the film type front filter of the plasma display panel according to the present invention, at least one cut portion is formed in the invalid connection portion provided in the invalid display portion of the panel. Such a cutout provides an expansion space to the invalid connection when the panel is driven under various conditions, and thus the invalid connection can stably provide ground.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

1 is a perspective view showing a discharge cell structure of a conventional three-electrode AC surface discharge type plasma display panel.

2 is a diagram illustrating a frame for expressing 256 gray levels in a typical plasma display panel.

3 is a cross-sectional view schematically showing one side of a conventional plasma display.

4 is a cross-sectional view schematically showing the front filter shown in FIG.

5 is a cross-sectional view schematically showing a film type front filter.

6 is a plan view showing a film type front filter;

7 is a view showing an electromagnetic shielding film formed on a film type front filter.

8 is a cross-sectional view showing a state in which an electromagnetic shielding film is connected to a panel.

9A and 9B are diagrams showing the appearance of wrinkles in the electromagnetic shielding film.

10 is a view showing that a failure occurs in the mesh of the electromagnetic wave shielding portion due to the wrinkles of the electromagnetic shielding film.

11 and 12 illustrate a film type front filter according to a first embodiment of the present invention.

13 is a view showing a film type front filter according to a second embodiment of the present invention.

14 is a view showing a film-type front filter according to a third embodiment of the present invention.

15 is a view showing a film type front filter according to a fourth embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

10: upper substrate 12Y, 12Z: transparent electrode

13Y, 13Z: bus electrode 14, 22: dielectric layer

16: protective film 18: lower substrate

24: partition 26: phosphor layer

30,60,90 Front filter 32 Panel

34: heat sink 36: printed circuit board

38 back cover 40 filter support

42: support member 50,62: antireflective film

52,64: optical film 54: glass

56,66: NIR shield 58,68: EMI shield

70,92: Effective connection 72,94: Invalid connection

74: EMI ground portion 76: EMI blocking portion

78: adhesive layer 80: wrinkles

96,98,100,102: cutout

Claims (13)

An effective connection part connected to the effective display part of the panel on which the image is displayed; An invalid connection portion connected to an area other than the effective display portion of the panel; And at least one cut portion formed in the invalid connection portion to provide an expansion space in the invalid connection portion. The method of claim 1, And the cut portion has a triangular shape that narrows toward the effective connection portion from the outside. The method of claim 1, And the cut portion has a rectangular shape. The film type front filter of the plasma display panel. The method of claim 1, And the cutout part has a trapezoidal shape that narrows toward the effective connection part from the outside. The method of claim 1, And the cutout part has a semicircular shape that narrows toward the effective connection part from the outside. The method of claim 1, The effective connection portion An anti-reflective film for preventing light incident from the outside from being re-emitted to the outside, An optical film for controlling the balance of light emitted from the panel to the outside; A near infrared (NIR) shielding film for blocking near infrared rays emitted from the panel to the outside; And an electromagnetic wave (EMI) shielding film for blocking electromagnetic waves emitted from the panel to the outside. The method of claim 6, And the invalid connection portion includes only the electromagnetic shielding film. An electromagnetic wave shielding portion connected to the effective display portion of the panel and formed in a mesh shape so that light supplied from the panel can be emitted to the outside; An electromagnetic wave grounding portion connected to an area other than the effective display portion of the panel to provide grounding to the electromagnetic wave shielding portion; And an electromagnetic shielding film including a cutout formed in at least one electromagnetic wave grounding portion to provide an expansion space to the electromagnetic wave grounding portion. The method of claim 8, The film-type front filter of the plasma display panel, characterized in that the electromagnetic ground is formed in a surface form to provide a stable ground. The method of claim 8, And the cut portion has a triangular shape that narrows toward the effective connection portion from the outside. The method of claim 8, And the cut portion has a rectangular shape. The film type front filter of the plasma display panel. The method of claim 8, And the cutout part has a trapezoidal shape that narrows toward the effective connection part from the outside. The method of claim 8, And the cutout part has a semicircular shape that narrows toward the effective connection part from the outside.