KR100829256B1 - Display filter and display apparatus using the same - Google Patents

Abstract

A display device filter and a display device using the same are provided to improve a display quality by optimizing transmittance and reflexibility of the filter. A display device filter includes plural light absorbing units(101) and a light transmitting unit(102). The light transmitting unit is arranged between the light absorbing units. An angle between a first side of the light absorbing unit and an external surface of the light transmitting unit is smaller than the angle between a second side of the light absorbing unit and the external surface of the light transmitting unit. A cross-section of the light absorbing unit is one of a trapezoidal shape and a triangular shape.

Description

Display Filter and Display Apparatus Using the Same {Display Filter and Display Apparatus Using the same}

1A to 1C illustrate structures of a display apparatus according to an embodiment of the present invention.

2 is a view for explaining the configuration of a plasma display device according to an embodiment of the present invention.

3A to 3B are views illustrating the structure of a display filter according to an embodiment of the present invention.

4A to 4B are views illustrating a structure of a display filter according to another embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

100: display filter 200: plasma display panel

101: light absorbing portion 102: light transmitting portion

The present invention relates to a display, and more particularly, to a display filter and a display device using the same.

In general, the plasma display apparatus includes a plasma display panel displaying an image using plasma discharge and a display filter disposed in front of the plasma display panel.

In general, a plasma display panel is a partition wall formed between a front panel and a rear panel to form a unit discharge cell, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne + He). An inert gas containing a main discharge gas such as and a small amount of xenon is filled. A plurality of unit discharge cells described above are gathered to form one pixel. For example, a red (R) cell, a green (G) cell, and a blue (B) cell may form one pixel.

When a high frequency voltage is applied to such a unit discharge cell to discharge, an inert gas generates vacuum ultra violet rays and emits phosphors formed between the partition walls to realize an image.

The display filter is disposed in front of the plasma display panel. Such display filters may be disposed in front of various display panels in addition to the plasma display panel to improve the quality and driving characteristics of image quality. Research into the functionality and structure of such display filters is ongoing.

Accordingly, an object of the present invention is to provide a display filter and a display device using the same, which improves the contrast characteristics and improves the emission efficiency of the image light inside the display.

Technical problems to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

According to an aspect of the present invention, a display filter includes a plurality of light absorbing portions and a light transmitting portion positioned between a plurality of light absorbing portions, and a first side surface of the cross section of the light absorbing portion and the light transmitting portion. The angle between the outer outer surface of the negative portion may be smaller than the angle between the second side surface of the cross section of the light absorbing portion and the outer surface of the light transmitting portion.

In addition, the cross-sectional shape of the light absorbing portion may be either trapezoidal or triangular.

In addition, the angle between the first side surface and the outer surface of the light transmitting portion of the cross section of the light absorbing portion may be 90 ~ 95 °.

In addition, an angle between the second side surface of the cross section of the light absorbing portion and the outer surface of the light transmitting portion may be 95 ° to 135 °.

In addition, the display filter may include at least one or more of a near infrared shielding film, a color correction film, an antireflection film, or an electromagnetic shielding film.

In addition, the light absorbing portion may include a light absorbing material.

In addition, the light absorbing portion may include one or more of black paint, black resin, carbon black, conductive black multiplex, or blackened metal.

According to another aspect of the present invention, there is provided a display apparatus including a display panel and a front panel disposed on a front surface of the display panel and including a plurality of light absorbing units and a light transmitting unit positioned between the plurality of light absorbing units. And a filter, wherein an angle between the first side surface of the cross section of the light absorbing unit and the external surface of the light transmitting unit may be smaller than an angle between the second side surface of the cross section of the light absorbing unit and the external surface of the light transmitting unit.

In addition, the cross-sectional shape of the light absorbing portion may be either trapezoidal or triangular.

In addition, the angle between the first side surface and the outer surface of the light transmitting portion of the cross section of the light absorbing portion may be 90 ~ 95 °.

In addition, an angle between the second side surface of the cross section of the light absorbing portion and the outer surface of the light transmitting portion may be 95 ° to 135 °.

The first side surface of the light absorbing portion may correspond to the upper screen of the display panel.

In addition, the display filter may include at least one or more of a near infrared shielding film, a color correction film, an antireflection film, or an electromagnetic shielding film.

In addition, the light absorbing portion may include a light absorbing material.

In addition, the light absorbing portion may include one or more of black paint, black resin, carbon black, conductive black multiplex, or blackened metal.

Specific details of other embodiments are included in the detailed description and the drawings. Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. Like reference numerals refer to like elements throughout.

The display device used in the present invention includes a large display device such as a plasma display panel (PDP), an organic light emitting diode (OLED), a liquid crystal display (LCD), and the like, having a lattice pattern (Pixel) and implementing RGB. The present invention may be variously applied to a small mobile display device such as a personal digital assistant, a small game display window, a mobile phone display window, and a flexible display device.

In particular, the present invention can be effectively applied to outdoor display devices having strong external light and display devices installed indoors of public facilities. Hereinafter, the present invention will be described using a PDP and a PDP filter used for convenience of description, but the present invention is not limited thereto and may be applied to the aforementioned various display apparatuses.

Hereinafter, a display filter and a display device using the same according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1A to 1C illustrate structures of a display apparatus according to an embodiment of the present invention.

As shown in FIG. 1A, a display apparatus according to an exemplary embodiment may include a display panel 200 and a display filter 100.

Among the display panels, for example, the self-luminous type plasma display panel 200 includes a plurality of electrodes, for example, a scan electrode Y, a sustain electrode Z, and an address electrode X, and are disposed on a driving circuit board (not shown). The formed driving units supply a driving voltage to these electrodes to generate a discharge to implement an image. A detailed structure will be described later with reference to FIG. 2.

The display filter 100 is disposed in front of the plasma display panel 200 and includes a light absorbing part and a light transmitting part. Here, the display filter 100 according to an embodiment of the present invention may improve the image quality by asymmetrically forming the cross-sectional shape of the light absorbing portion asymmetrically, which will be described later in FIG. 3.

The display filter 100 according to the exemplary embodiment of FIG. 1A may include a rectangular light transmitting part arranged in a stripe shape on a horizontal direction of the plasma display panel 200, that is, on an X axis. The display panel 200 emits the image light emitted through the light transmitting unit. In addition, the other region may form a light absorbing portion that absorbs external light.

The display filter 100 according to another exemplary embodiment of FIG. 1B may include a light transmitting part in which a plurality of cross sections are arranged in a rectangular shape in a horizontal direction, that is, on the X axis of the plasma display panel 200. In addition, the display filter 100 includes a light absorbing part having a cross-sectional shape asymmetrically formed in a region other than the light transmitting part.

The display filter 100 according to another exemplary embodiment of FIG. 1C may include a light transmitting part in which a plurality of horizontal cross-sectional shapes are arranged in a circular shape. In addition, the display filter 100 includes a light absorbing part formed in a region other than the light transmitting part and having a cross-sectional shape asymmetrically.

2 is a view for explaining the configuration of a plasma display device according to an embodiment of the present invention.

As shown in FIG. 2, the plasma display apparatus according to the exemplary embodiment may include a plasma display panel 200 and a display device filter 100.

First, the plasma display panel 200 includes, for example, a front panel 210 in which a plurality of sustain electrode pairs formed by pairing a scan electrode 212 and a sustain electrode 213 are arranged on a front substrate 211, which is a display surface on which an image is displayed. ) And a rear panel 220 having a plurality of data electrodes 223 arranged on the rear substrate 221 forming the rear surface so as to intersect the plurality of storage electrode pairs described above.

The front panel 210 may be formed of, for example, a scan electrode 212 and a sustain electrode 213, that is, a transparent electrode (a) formed of a transparent ITO material and a metal material to mutually discharge each other in one discharge cell and maintain light emission. The scan electrode 212 and the sustain electrode 213 provided as the manufactured bus electrode b may be included in pairs. It is also possible to form only the transparent electrode a or only the bus electrode b.

Scan electrode 212 and sustain electrode 213 are covered by one or more top dielectric layers 214 that limit discharge current and insulate between electrode pairs, and facilitate discharge conditions on top of top dielectric layer 214. For example, a protective layer 215 formed by depositing magnesium oxide (MgO) is formed.

The rear panel 220 is arranged such that, for example, stripe-type or well-type partition walls 222 for forming a plurality of discharge spaces, that is, discharge cells, are kept in parallel.

In addition, a plurality of data electrodes 223, which perform address discharge to generate vacuum ultraviolet rays, are disposed parallel to the partition wall 222.

On the upper side of the rear panel 220, R, G, and B phosphors 224 that emit visible light for image display during address discharge are coated. A lower dielectric layer 225 is formed between the data electrodes 223 and X and the phosphor 224 to protect the data electrode 223.

The front panel 210 and the rear panel 220 formed as described above are bonded to each other through a sealing process to form a plasma display panel.

In addition, a driving unit (not shown) for driving electrodes such as a plurality of electrodes, for example, a scan electrode 212, a sustain electrode 213, and a data electrode 223 is attached to the plasma display panel, and the plasma display panel 200 is attached. A filter 100 or the like is disposed on the front surface to form a plasma display device.

The display filter 100 is disposed in front of the plasma display panel 200, and includes a light absorbing unit 101 and a light transmitting unit 102. In addition, the cross-sectional shape of the light absorbing unit 101 is formed asymmetrically to effectively block external light on the screen of the plasma display panel 200, and image quality using total reflection of the image light emitted from the plasma display panel 200. Can be improved.

The plurality of light absorbing units 101 may be formed to be spaced apart from each other by a predetermined interval. The cross-sectional area of the light absorbing unit 101 may be formed to become wider toward the back of the display filter 100 as shown in FIG. 2. In addition, the light absorbing unit 101 may be formed as a thin film on the entire surface of the display filter 100.

In addition, the light absorbing unit 101 may be formed to have a smaller area toward the rear side of the display filter 100. As described above, the light absorbing unit 101 may prevent reflection of external light to improve contrast characteristics and increase transmittance of internal image light to improve luminance.

The light transmitting portion 102 is formed in a region other than the light absorbing portion 101. That is, it may be formed between the plurality of light absorbing portions 101 to transmit the image light therein.

The light absorbing unit 101 may include a light absorbing material, and may include, for example, one or more of black paint, black resin, carbon black, conductive black multiplex, or black metal to effectively block external light.

The cross-sectional shape of the light absorbing portion 101 may be one of a trapezoid or a triangle, and the cross-sectional shape of the light absorbing portion 101 may be asymmetrically formed to effectively block external light in an upward direction.

As such, the display filter 100 according to the exemplary embodiment may improve the image quality by asymmetrically forming the cross-sectional shape of the light absorbing unit 101, which will be described below with reference to FIG. 3. do.

In addition, the display filter 100 may be formed at least one or more of the functional film 110 of the near-infrared shielding film, color correction film, anti-reflection film or electromagnetic interference shielding film on the front or rear side. In FIG. 2, the front surface of the display filter 100 is disposed, but the plurality of functional films 110 may be disposed on both the front and rear surfaces of the display filter 100.

3A to 3B are views illustrating the structure of a display filter according to an embodiment of the present invention.

As shown in FIG. 3A, the display filter 100 is disposed in front of the display panel 200, and includes a light absorbing unit 101 and a light transmitting unit 102. The cross-sectional shape of the light absorbing unit 101 may be formed in a trapezoidal shape to block external light.

In addition, in the display filter 100 according to the exemplary embodiment, the light absorbing portion 101 has an asymmetric cross-sectional shape. That is, the angle α between the first side surface 104 of the cross section of the light absorbing unit 101 and the outer surface 103 of the light transmitting unit 102 is set to the first side surface 104 of the cross section of the light absorbing unit 101. Asymmetry is formed by making the angle β between the second side 105 and the outer surface 103 of the light-transmitting part 102 the opposite side) to smaller.

In addition, the first side 104 of the cross section of the light absorbing unit 101 may correspond to an upper screen Top, that is, an upper screen of the plasma display panel 200.

Here, the angle α between the first side surface 104 and the outer surface 103 of the light transmitting portion 102 of the cross section of the light absorbing portion 101 may be approximately 90 to 95 °, the light absorbing portion 101 The angle β between the second side surface 105 and the outer surface 103 of the light-transmitting part 102 may be about 95 to 135 degrees.

As such, the angle between the first side surface 104 and the outer surface 103 of the light transmitting portion 102 of the cross section of the light absorbing portion 101 corresponding to the upper screen Top direction of the plasma display panel 200 ( By making α) smaller than the angle β between the second side surface 105 of the cross section of the light absorbing portion 101 and the outer surface 103 of the light transmitting portion 102, it is possible to effectively block external light.

Therefore, by reducing the external light reflectance of the display, it is possible to improve the contrast characteristics and to implement a clearer and clearer image.

Here, in the display filter 100 according to the exemplary embodiment of the present invention, an angle α between the first side surface 104 and the external surface 103 of the light transmitting portion 102 of the light absorbing portion 101 is determined. The cross section of the light absorbing portion 101 is illustrated to be smaller than the angle β between the second side surface 105 and the outer surface 103 of the light transmitting portion 102, but the present invention is not limited thereto.

Unlike the display filter 100 illustrated in FIG. 3A, the display filter 100 illustrated in FIG. 3B may have a cross-sectional shape of the light absorbing unit 101 formed in a triangular shape to block external light.

That is, while the cross-sectional shape of the light absorbing portion 101 is triangular, the angle α between the first side surface 104 and the outer surface 103 of the light transmitting portion 102 of the cross section of the light absorbing portion 101 is determined. Among the cross-sections of the light absorbing portion 101, the asymmetry may be made smaller than the angle β between the second side surface 105 and the outer surface 103 of the light transmitting portion 102 to effectively block external light.

4A to 4B are diagrams illustrating the structure of a display filter according to another exemplary embodiment of the present invention.

As shown in Figure 4a to 4b, the display filter 100 according to another embodiment of the present invention is a near-infrared shielding film 114, a color correction film 113, the front or rear side of the light transmitting portion 102, At least one or more functional films of the anti-reflection film 112 or the electromagnetic interference shielding film 111 may be formed. 4A to 4B, it can be seen that the display filter 100 is disposed on both the front and rear sides thereof.

Such a functional film may be formed in one layer having a complex function, or may be disposed only on one side of the front or rear surface of the display filter 100. By configuring the functional film as described above, the transmittance and reflectance of the light absorbing unit 101 and the light transmitting unit 102 may be appropriately adjusted to optimize the transmittance and reflectance of the entire display filter 100 to improve the image quality of the display.

As such, the technical configuration according to an embodiment of the present invention described above may be implemented in other specific forms by those skilled in the art to which the present invention pertains without changing its technical spirit or essential characteristics according to an embodiment of the present invention. You will understand that.

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.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains can understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. will be. Therefore, the above-described embodiments 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 detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

The display filter and the display device using the same according to an embodiment of the present invention made as described above has an effect of improving the contrast characteristics and improving the emission efficiency of the image light inside the display.

Claims (15)

A plurality of light absorbing portions; And It includes a light transmitting portion located between the plurality of light absorbing portion, And an angle between the first side of the cross section of the light absorbing portion and the outer surface of the light transmitting portion is smaller than the angle between the second side of the cross section of the light absorbing portion and the external surface of the light transmitting portion. The method of claim 1, The cross-sectional shape of the light absorbing portion is any one of a trapezoid or a triangle. The method of claim 1, And an angle between the first side of the cross section of the light absorbing portion and an outer surface of the light transmitting portion is 90 to 95 degrees. The method of claim 1, And an angle between a second side surface of the cross section of the light absorbing portion and an outer surface of the light transmitting portion is 95 to 135 degrees. The method of claim 1, The display filter may include at least one or more of a near infrared shielding film, a color correction film, an antireflection film, or an electromagnetic shielding film. The method of claim 1, And the light absorbing part comprises a light absorbing material. The method of claim 6, And the light absorbing part comprises at least one of black paint, black resin, carbon black, conductive black multiplex, or blackened metal. Display panel; And A display filter disposed in front of the display panel, the display filter including a plurality of light absorbing portions and a light transmitting portion positioned between the plurality of light absorbing portions; And an angle between a first side surface of the cross section of the light absorbing portion and an outer surface of the light transmitting portion is smaller than an angle between a second side surface of the cross section of the light absorbing portion and the external surface of the light transmitting portion. The method of claim 8, The cross-sectional shape of the light absorbing portion is any one of a trapezoid or a triangle. The method of claim 8, And an angle between the first side surface and the outer surface of the light transmitting portion in the cross section of the light absorbing portion is 90 to 95 degrees. The method of claim 8, And an angle between a second side surface of the cross section of the light absorbing portion and an outer surface of the light transmitting portion is 95 to 135 degrees. The method of claim 8, And the first side surface of the cross section of the light absorbing portion corresponds to an upper screen of the display panel. The method of claim 8, The display filter comprises at least one of a near infrared shielding film, a color correction film, an antireflection film or an electromagnetic shielding film. The method of claim 8, And the light absorbing part comprises a light absorbing material. The method of claim 14, The light absorbing unit may include at least one of black paint, black resin, carbon black, conductive black multiplex, or blackened metal.

Images