KR20100052039A - Filter and display apparatus - Google Patents

Abstract

PURPOSE: A filter and display device is provided to emphasize an image displayed on a screen by change transmittance or luminosity of a black frame arranged on a substrate circumference differently according to a position. CONSTITUTION: A filter is arranged on the front side of a display panel. The filter comprises a black frame(230) arranged on a contrary edge of a surface facing a display panel. The black frame comprises first and second portions, transmittances of which are different from each other.

Description

Filter and Display Apparatus {Filter and Display Apparatus}

The present invention relates to a filter and a display device.

The display device includes a display panel and a filter for displaying an image.

A display panel displays a predetermined image on a screen, and a display panel includes a liquid crystal display (LCD), a field emission display (FED), and an organic light emitting display (OLED). And plasma display panels (PDPs).

The filter may be disposed in front of the display panel to shield electromagnetic waves emitted from the display panel or to shield near infrared rays (NIR).

SUMMARY OF THE INVENTION An object of the present invention is to provide a filter and a display device including the same, which improves a black frame disposed on an edge of a substrate so that an image displayed on a screen is outstanding.

The filter according to the present invention may include a black frame disposed on an edge of one surface of the substrate and the substrate, and the black frame may include first and second portions having different transmittances.

Further, the first portion may have a lower transmittance than the second portion, the center of the first portion, the second portion and the substrate may be disposed in a straight line, and the first portion may be disposed between the second portion and the center of the substrate. .

Also, the thickness of the first portion may be thicker than the thickness of the second portion.

In addition, the thickness of the first portion may be the same as the thickness of the second portion.

In addition, the transmittance of the black frame may increase as the distance from the center of the substrate.

In addition, the black frame may be a film type.

Further, the thickness of the first portion of the black frame may be thicker than the thickness of the second portion, and the number of layers in the first portion may be greater than the number of layers in the second portion.

In addition, a metal mesh layer may be disposed on the other surface of the substrate.

In addition, the metal mesh layer may be formed by printing on the other surface of the substrate, and the metal mesh layer may contact the other surface of the substrate.

In addition, another filter according to the present invention includes a substrate and a black frame disposed on the edge of one surface of the substrate, the black frame includes a first portion and a second portion having different brightness, The portion may have lower brightness than the second portion, the center of the first portion, the second portion and the substrate may be disposed in a straight line, and the first portion may be disposed between the second portion and the center of the substrate.

In addition, the display device according to the present invention includes a display panel and a filter disposed on the front of the display panel, the filter is a black frame disposed on the edge of the substrate and the opposite side of the surface of the both sides of the substrate opposite the display panel (Black Frame), and the black frame may include first and second portions having different transmittances.

The filter and the display device including the same according to the present invention have a visual effect of making the image displayed on the screen stand out by varying the transmittance or brightness of the black frame disposed at the edge of the substrate according to the position.

Hereinafter, a filter and a display apparatus including the same according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a view for explaining an example of the display device according to the present invention. Hereinafter, a plasma display panel (PDP) will be described as an example of the display panel. However, the display panel applicable to the present invention is not limited to the plasma display panel, but is a liquid crystal display panel. , LCD), a field emission display panel (FED), and an organic light emitting display panel (OLED).

Referring to FIG. 1, the display device according to the present invention may include a plasma display panel 100 and a filter 110 for displaying an image.

The plasma display panel 100 displays a predetermined image on the screen, and the display filter 110 is disposed in front of the display panel 100.

The plasma display panel 100 includes a front substrate 201 on which scan electrodes 202 and Y and sustain electrodes 203 and Z which are parallel to each other are disposed, and are arranged to face the front substrate 201, and the scan electrodes 202 and The rear substrate 211 on which the address electrode 213 intersects the sustain electrode 203 may be disposed.

An upper dielectric layer 204 covering the scan electrode 202 and the sustain electrode 203 may be disposed on the front substrate 201 where the scan electrode 202 and the sustain electrode 203 are disposed.

The upper dielectric layer 204 limits the discharge current of the scan electrode 202 and the sustain electrode 203 and can insulate the scan electrode 202 and the sustain electrode 203.

A protective layer 205 may be disposed over the upper dielectric layer 204 to facilitate discharge conditions. The protective layer 205 may include a material having a high secondary electron emission coefficient such as magnesium oxide (MgO).

In addition, an electrode, for example, an address electrode 213 is disposed on the rear substrate 211, and an address electrode 213 is covered on the rear substrate 211 on which the address electrode 213 is disposed to insulate the address electrode 213. A dielectric layer, such as lower dielectric layer 215, may be disposed.

Between the front substrate 201 and the back substrate 211, a discharge space, that is, a partition wall such as a stripe type, a well type, a delta type, and a honeycomb type that partitions the discharge cell ( 212 may be disposed. The barrier rib 212 may be provided with a red (R), green (G), and blue (B) discharge cell between the front substrate 201 and the rear substrate 211.

For example, in a closed type partition structure, the partition 212 may include a first partition (not shown) and a second partition (not shown) that cross each other. In addition, the height of the first and second partition walls may be different.

The discharge cell partitioned by the partition 212 is filled with a predetermined discharge gas. In addition, a phosphor layer 214 that emits visible light for image display may be disposed in the discharge cell partitioned by the partition wall 212. For example, red (R), green (G), and blue (B) phosphor layers may be disposed.

In the above, only one example of the plasma display panel to which the present invention can be applied is illustrated and described, and the present invention is not limited to the plasma display panel having the structure described above. For example, in the above description, only the case where the scan electrode 202 and the sustain electrode 203 are disposed in contact with the upper surface of the front substrate 201 is illustrated. Alternatively, the front substrate 201 and the scan electrode 202 are different. And at least one functional layer, for example, another dielectric layer, may be further disposed between the sustain electrode 203 or the upper dielectric layer 204 may have a multi-layer structure.

When the filter 110 is disposed in front of the display panel 100, the filter 110 may include a substrate 220 forming a basic skeleton and at least one functional layer 221 ˜ 225 disposed on the upper or lower portion of the substrate 220. have.

At least one of the functional layers 221 to 225 may include a color layer for improving color of an image displayed on a screen, and a near infrared ray shielding a near infrared ray (NIR) generated from the display panel 100. A shielding layer, an anti-reflective layer that prevents reflection of light incident from the outside in the direction of the display panel 100, an EMI layer that shields electromagnetic waves generated from the display panel 100, and other It is possible that it is a resin layer which prevents damage of a functional layer.

In addition, it may be possible to arrange an adhesive layer for adhering these two functional layers between two adjacent functional layers.

In addition, the filter 110 may include a black frame disposed at the edge of the substrate 220.

2 to 6 are diagrams for explaining the black frame.

First, referring to FIG. 2, the black frame 230 may be disposed in an edge region of the substrate 220. In addition, the black frame 230 may be formed to surround the edge of the substrate 220.

Here, if the area B in which the black frame 230 is disposed in the substrate 220 is called a dummy area, the area B is disposed inside the area B in which the black frame 230 is disposed and the black frame 230 is disposed. The area A where) is not disposed may be referred to as an active area.

A part of the dummy area B of the substrate 220 may be covered by the black frame 230, and the effective area A of the substrate 220 may be an area where a screen implemented by the display panel is displayed. .

On the other hand, the black frame 230 may have a different transmittance depending on the position.

For example, suppose that there is a line segment connecting the arbitrary point P ′ of the outside of the substrate 220 from the center point P of the substrate 220 as in the case of FIG. 3. The silver may include a first portion 300, a second portion 310, a third portion 320, and a fourth portion 330 having different transmittances. Here, the transmittance of the first portion 300 is lower than the transmittance of the second portion 310, the transmittance of the second portion 310 is lower than that of the third portion 320, and the transmittance of the third portion 320 is reduced. It may be preferable that the transmittance is lower than the transmittance of the fourth portion 330.

That is, when comparing the positional relationship between the first portion 300 and the second portion 310 having different transmittances, the center P of the first portion 300, the second portion 310, and the substrate 220 is straight. The first portion 300 is disposed between the second portion 310 and the center P of the substrate 220.

Here, in FIG. 3, the thicknesses of the first, second, third, and fourth portions 300, 310, 320, and 330 of the black frame 230 may be substantially the same. That is, the transmittances of the first, second, third, and fourth parts 300, 310, 320, and 330 in a state in which the first, second, third, and fourth parts 300, 310, 320, and 330 have substantially the same thickness. To be different.

As such, the first portion 300 having a relatively low transmittance may appear dark to the viewer, and the fourth portion 330 having a relatively high transmittance may appear relatively bright to the viewer. Here, the fourth part 330 looks brighter and the first part 300 looks darker may mean that the brightness of the fourth part 330 is higher than that of the first part 300. .

As such, if the first portion 300 looks darker and the fourth portion 330 looks brighter, the image displayed in the effective area A of the substrate 220 may be more noticeable to the viewer. The effect may occur.

For example, FIG. 4A illustrates a case where the transmittance of the black frame disposed in the dummy region B of the substrate 220 is substantially the same regardless of the position, and (b) illustrates the dummy region B of the substrate 220. In the case where the transmittance of the black frame arranged in the) varies depending on the position, the transmittance decreases as the closer to the center of the substrate 220.

Comparing the case of (a) and (b) of FIG. 4, in the case of (b), the effective area A of the substrate 220 is more protruded or more prominent than the case of (a). I can see it. This may mean that in the case of (b), the image displayed in the effective area A looks more protruding or more prominent than in the case of (a).

As a result, even if the image displayed on the screen is not changed, if the transmittance of the black frame 230 disposed on the edge of the substrate 220 is adjusted, a visual effect of making the screen more prominent to the viewer can be obtained.

Meanwhile, the black frame 230 may have a film shape, and as illustrated in FIG. 5, the black frame 230 may be attached to the substrate 220.

If it is assumed that the black frame 230 is formed on the substrate 220 by using a printing method such as a screen printing method.

In this case, it may be very difficult to adjust the transmittance of the black frame 230 according to the position.

For example, in the case of a filter disposed in front of a 50-inch panel, the size of the substrate 220 is relatively large, such as 50 inches or more. In this case, if the black frame 230 is formed on the substrate 220 by screen printing, the screen printing process for adjusting the transmittance of the black frame 230 must be performed a plurality of times. As shown in FIG. 3, when the black frame 230 includes first, second, third, and fourth portions 300, 310, 320, and 330 having different transmittances, a screen for forming the first portion 300. Once printing process, screen printing process for forming second part 310 Once, screen printing process for forming third part 320 Once, screen printing process for forming fourth part 330 The need for one cycle may require at least four screen printing processes. Accordingly, the manufacturing cost and the time required for the manufacturing process may be excessively increased.

On the other hand, after manufacturing the black frame 230 in the form of a film having a relatively small size as in the case of Figure 5, the laminating method such as the film-shaped black frame 230 to the substrate 220 By using this method, manufacturing time and manufacturing cost can be significantly reduced.

In addition, in the case of FIG. 3, the black frame 230 may be formed using one film. That is, it is possible to attach the above film to the substrate 220 after forming one film having different transmittances together.

On the other hand, when the black frame 230 is formed using a film, a boundary line may be formed at a boundary portion of each film attached to the substrate 220 due to a process characteristic of attaching a previously manufactured film to the substrate 220. Can be. That is, the boundary line can be formed not only at the boundary between the effective area A and the dummy area B, but also within the dummy area B. FIG.

For example, as shown in FIG. 6, after the horizontal films 620 and 630 are first attached in the horizontal direction of the substrate 220, the vertical films 640 and 650 are attached in the vertical direction of the substrate 220. In this case, a boundary line may be formed at the boundary between the horizontal film 620 and 630 and the vertical film 640 and 650 due to the difference in transmittance, as in the boundary between the dummy area B and the effective area A. .

If the black frame 230 is formed by the screen printing method, the boundary line may not be formed in the dummy region B as shown in FIG. 6, but the manufacturing cost and manufacturing time consumed for the black frame 230 are not preferable. You may not.

As a result, considering that the black frame 230 is formed at a lower cost within a short time using the film, it may be desirable to form a boundary in the dummy region B as in the case of FIG. 6.

Here, in FIG. 6, the black frame has a third transmittance higher than the first portion 600 and the second portions 601 and 611 having a higher transmittance than the first portions 600 and 610 and the second portions 601 and 611. Fourth portions 603 and 613 having higher transmittance than portions 602 and 612 and third portions 602 and 612 and fifth portions 604 and 614 having higher transmittance than fourth portions 603 and 613. The sixth parts 605 and 615 having higher transmittance than the five parts 604 and 614 and the seventh parts 606 and 616 having higher transmittance than the sixth parts 605 and 615 are included.

7 is a diagram for explaining the transmittance of a black frame. The graph shown in FIG. 7 is data obtained by measuring the transmittance of a black frame having a total of three types (Case 1, Case 2, and Case 3).

Referring to FIG. 7, the black frame 230 may have a structure in which the transmittance increases as the distance from the center P of the substrate increases.

In case 1, the transmittance is about 10% at the point ⑨ closest to the center (P), and the transmittance gradually increases as it moves away from the center (P) of the board. It can be seen that.

In addition, in the case of Case 2 and Case 3, as in Case 1, it can be seen that the transmittance gradually increases from the point ⑨ to the point ①.

As such, when the transmittance of the black frame 230 gradually increases as the distance from the center P of the substrate increases, it may be possible to make the image displayed on the substrate more visible.

8 is a diagram for explaining the position of a black frame.

Referring to FIG. 8, the black frame 230 may be disposed on the image side on the substrate 220. That is, the black frame 230 is disposed at the edge of the surface of the substrate 220 opposite to the display panel, that is, the surface opposite to the panel side, that is, the image side.

If the black frame 230 is disposed on the surface of the panel side of the substrate 220, the effect of the image being outstanding may be weakened.

In addition, a color layer 221, a resin layer 222, and an anti-reflection layer 223 may be further disposed on the image side of the substrate 220 in addition to the black frame 230.

Here, since the color layer 221 has a predetermined color, it may be preferable that the black frame 230 is disposed above the color layer 221 in order to enhance the effect of the image being prominent by the black frame 230. .

In addition, the anti-reflection layer 223 may be disposed at the outermost side of the image side to increase the reflection efficiency of light incident from the outside.

9 is a diagram for explaining the electromagnetic shielding layer.

Referring to FIG. 9, an electromagnetic shielding layer 900 may be further disposed on the substrate 220.

The electromagnetic shielding layer 900 may be disposed on an opposite side of the surface on which the black frame 230 is disposed, and may include a metal mesh layer.

The metal mesh layer may be formed by printing on the substrate, and thus the metal mesh layer may be formed in contact with the substrate.

If the electromagnetic shielding layer 900 is the same as the black frame 230 on the substrate 220, it may be difficult to form the electromagnetic shielding layer 900 by the printing method by the black frame 230.

Therefore, it may be desirable that the electromagnetic shielding layer 900 is disposed on an opposite side of the surface on which the black frame 230 is formed on the substrate 220.

10 is a diagram for explaining the thickness of a black frame.

Referring to FIG. 10, the black frame 230 may have a different thickness depending on its position. Preferably, the thickness of the portion having a relatively low transmittance in the black frame 230 may be thicker than the thickness of the portion having a relatively high transmittance.

In addition, when the black frame 230 is manufactured by using a laminating method of attaching a film to the substrate 220, in order to change the thickness of the black frame 230 according to a position, the transmittance of the black frame 230 is relatively high. As a result, it is possible to control the transmittance differently by increasing the number of layers in the high part and decreasing the number of layers in the part where the transmittance is relatively low.

For example, as in the case of FIG. 10, in the black frame 230, the transmittance of the first portion L1 is lower than that of the second portion L2, and the transmittance of the second portion L2 is the third portion L3. It is assumed that the transmittance of the third portion L3 is lower than the transmittance of the third portion L3, and lower than the transmittance of the fourth portion L4.

In this case, the first film 1000 for forming the black frame 230 is attached over the first, second, third, and fourth portions L1, L2, L3, L4, and the second film 1001 is attached. The third film 1002 is attached to the second, third, and fourth parts L2, L3, and L4 except for the first part L1, and the third, third, and fourth parts except for the first and second parts L1 and L2. The fourth film 1003 may be attached to the fourth portion L4 except for the first, second and third portions L1, L2, and L3.

Then, the number of floors in the first portion L1 becomes four layers in total, the number of layers in the second portion L2 becomes three layers in total, and the number of layers in the third portion L3 becomes two layers in total, and the fourth The total number of layers of the portion L4 is one layer, so that the transmittance of the first portion L1 is lower than that of the second portion L2, and the transmittance of the second portion L2 is lower than that of the third portion L3. The transmittance of the third part L3 may be lower than that of the fourth part L4.

Here, the transmittance | permeability of the 1st, 2nd, 3rd, and 4th films 100, 1001, 1002, and 1003 can mutually be the same and may differ from each other.

As such, when the thickness thereof is changed according to the position of the black frame 230, the adhesion to other functional layers may be improved by increasing the surface area of the black frame 230.

For example, when the black frame 230 is disposed between the color layer 221 and the resin layer 222 as in the case of FIG. 8, the color layer 221 and the black frame 230 are not shown. An adhesive layer for adhering the boundary portion, two layers adjacent to the boundary portion of the black frame 230 and the resin layer 222 may be further disposed.

Accordingly, if the thickness of the black frame 230 is changed according to the position as in the case of FIG. 10, the surface area of the black frame 230 may be increased, thereby increasing the adhesive force by the adhesive layer.

On the other hand, higher transmittance may mean brighter than the surroundings, and low transmittance may mean darker than the surroundings. For example, in the case of FIG. 3, the fourth portion 330 looks brighter and the first portion 300 looks darker than the brightness of the fourth portion 330 is higher than that of the first portion 300. It can mean higher.

Therefore, high transmittance can be replaced by high brightness, and low transmittance can be replaced by low brightness.

As such, the technical configuration of the present invention described above can be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the foregoing detailed description, and the meaning and scope of the claims are as follows. And all changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

1 is a view for explaining an example of a display device according to the present invention.

2 to 6 are diagrams for explaining the black frame.

7 is a diagram for explaining the transmittance of a black frame.

8 is a diagram for explaining the position of a black frame.

9 is a diagram for explaining an electromagnetic wave shielding layer.

10 is a diagram for explaining the thickness of a black frame.

Claims (11)

Board; And A black frame disposed at an edge of one surface of the substrate; Including, The black frame includes a first portion and a second portion having different transmittances. The method of claim 1, The first portion has a lower transmittance than the second portion, And a center of the first portion, the second portion, and the substrate is disposed in a straight line, and the first portion is disposed between the second portion and the center of the substrate. The method of claim 2, The thickness of the first portion is thicker than the thickness of the second portion. The method of claim 2, A thick filter, wherein the thickness of the first portion is the same as the thickness of the second portion. The method of claim 1, The transmittance of the black frame increases as the distance from the center of the substrate. The method of claim 1, The black frame is a film (Film) type filter. The method of claim 6, The thickness of the first portion of the black frame is thicker than the thickness of the second portion, The number of layers in the first portion is greater than the number of layers in the second portion. The method of claim 1, And a metal mesh layer on the other surface of the substrate. The method of claim 8, And the metal mesh layer is formed by printing on the other surface of the substrate, and the metal mesh layer is in contact with the other surface of the substrate. Board; And A black frame disposed at an edge of one surface of the substrate; Including, The black frame includes a first portion and a second portion having different brightness, The first portion is lower in brightness than the second portion, And a center of the first portion, the second portion, and the substrate is disposed in a straight line, and the first portion is disposed between the second portion and the center of the substrate. Display panel; And A filter disposed at the front of the display panel; Including, The filter is Board; And A black frame disposed at an edge of a surface opposite to the display panel of both sides of the substrate; Including, The black frame includes a first portion and a second portion having different transmittances.

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