Patent Application
20070258160
The accompany drawings, which are included to provide a further understanding of the invention and are incorporated on and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:
a to 2e illustrate a method of manufacturing the filter for the display apparatus according to an embodiment;
Reference will now be made in detail embodiments of which are illustrated in the accompanying drawings.
A filter for a display apparatus comprises a base film layer, an electromagnetic interference (EMI) shielding layer formed on the base film layer, and a resin layer formed on the EMI shielding layer.
The EMI shielding layer may be a mesh type or a conductive type.
The resin layer may be a thermosetting resin layer.
The resin layer may be formed on the remaining EMI shielding layer except a ground portion of the EMI shielding layer.
The resin layer may comprise at least one of a near infrared ray shielding material, an orange wavelength absorption material, or a color control material.
The filter for the display apparatus may further comprise a non-reflection layer formed on the resin layer.
The filter for the display apparatus may further comprise an adhesive layer formed on a rear surface of the base film layer.
The adhesive layer may comprise at least one of a near infrared ray shielding material, an orange wavelength absorption material, or a color control material.
A plasma display apparatus comprises a plasma display panel, and a filter formed on the plasma display panel, the filter comprising a base film layer, an EMI shielding layer formed on the base film layer, and a resin layer formed on the EMI shielding layer.
The EMI shielding layer may be a mesh type or a conductive type.
The resin layer may be a thermosetting resin layer.
The resin layer may be formed on the remaining EMI shielding layer except a ground portion of the EMI shielding layer.
The resin layer may comprise at least one of a near infrared ray shielding material, an orange wavelength absorption material, or a color control material.
The filter for the display apparatus may further comprise a non-reflection layer formed on the resin layer.
The filter for the display apparatus may further comprise an adhesive layer formed on a rear surface of the base film layer.
The adhesive layer may comprise at least one of a near infrared ray shielding material, an orange wavelength absorption material, or a color control material.
A method of manufacturing a filter for a display apparatus comprises forming; an EMI shielding layer on a base film layer, and forming a resin layer on the EMI shielding layer.
The method may further comprise forming a non-reflection layer on the resin layer, and forming an adhesive layer on a rear surface of the base film layer.
The EMI shielding layer may be a mesh type or a conductive type, and the EMI shielding layer may be formed using one of a photolithographic etching method, a printing method, a plating method, an off-set method, an inkjet method, and a vacuum deposition method.
Forming the resin layer may comprise coating thermosetting resin mixed in at least one of a near infrared ray shielding material, an orange wavelength absorption material, or a color control material on the remaining EMI shielding layer except a ground portion of the EMI shielding layer, and hardening the thermosetting resin.
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the attached drawings.
As illustrated in
The base film layer 110 may be formed of a transparent material film such as polyethyleneterephthalate (PET) and tantalum carbide (TAC).
The EMI shielding layer 120 prevents electromagnetic waves generated when driving the display apparatus from being emitted to the outside through a display surface of the display apparatus.
The EMI shielding layer 120 is directly formed on the base film layer 110. This is to remove an adhesive layer necessary to form the EMI shielding layer 120 on the base film layer 110.
Further, the EMI shielding layer 120 is formed in a mesh type. The mesh type EMI shielding layer 120 is formed by forming a metal layer with conductivity in a mesh pattern form. The mesh type EMI shielding layer 120 has a ground portion for grounding the metal layer of the mesh pattern at an end portion thereof.
The resin layer 130 prevents near infrared rays generated when driving the display apparatus from being emitted to the outside through the display surface of the display apparatus, absorbs an orange wavelength of 590 nm, and controls colors expressed by optical characteristics of the display apparatus.
The resin layer 130 may be formed of transparent resin comprising at least one of a near infrared ray shielding material, an orange wavelength absorption material, or a color control material.
Moreover, the resin layer 130 may not comprise unnecessary material among the near infrared ray shielding material, the orange wavelength absorption material, and the color control material depending on characteristics of the display apparatus having the filter. The resin layer 130 may further comprise a material having another function in addition to the materials whenever necessary.
As above, since the resin layer 130 has various functions, the number of function layers of the filter is reduced. A reduction in the number of function layers reduces the number of adhesive layers for adhering the function layers to one another.
The resin layer 130 having various function materials is directly formed on the messy type EMI shielding layer 120. This is to remove an adhesive layer necessary to form the resin layer 130 on the messy type EMI shielding layer 120. The resin layer 130 is not formed on the ground portion of the messy type EMI shielding layer 120.
The filter for the display apparatus according to an embodiment, as illustrated in
The non-reflection layer 140 is formed on the resin layer 130. The non-reflection layer 140 is formed of at least one of an anti-reflection layer, an anti-glare layer, or a multiple layer of an anti-reflection layer and an anti-glare layer. The anti-reflection layer vanishes external light using a plurality of layers each having a different refraction index. The anti-glare layer diffuses external light using a layer having a concavo-convex portion formed on the surface thereof.
The adhesive layer 150 is formed on a rear surface of the base film layer 110, and used to adhere the filter to the display apparatus. The adhesive layer 150 may comprise at least one of the near infrared ray shielding material, the orange wavelength absorption material or the color control material, whenever necessary. In this case, the material which the adhesive layer 150 comprises may be excluded from the material forming the resin layer 130.
a to 2e illustrate a method of manufacturing the filter for the display apparatus according to an embodiment.
As illustrated in
First, as illustrated in
As illustrated in
The mesh type EMI shielding layer 120 can be formed by directly forming a mesh pattern on the base film layer 110. Moreover, the mesh type EMI shielding layer 120 can be formed by forming a metal layer, and then removing an unnecessary portion from the metal layer using an etching process. The direct formation of the mesh pattern uses a printing method, an off-set method, an inkjet method, a plating method, a vacuum deposition method, and the like.
As illustrated in
Below, the explanation will be given of an example of a method of using thermosetting resin.
At least one of a dye or a pigment having a near infrared ray shielding function, a dye or a pigment having an orange wavelength absorption function, or a dye or a pigment having a color control function is mixed in thermosetting resin.
The thermosetting resin is coated on the mesh type EMI shielding layer 120. In this case, the thermosetting resin is not coated on the ground portion of the mesh type EMI shielding layer 120. The coated thermosetting resin is then planarized.
The planarized thermosetting resin is hardened to complete the resin layer 130. The curable resin may use polymethylmethacrylate (PMMA), acryl, EVA, and the like. Kinds of the above-described dye or pigment may vary depending on the setting of transmissivity of the filter.
Although the filter for the display apparatus according to an embodiment comprised the thermosetting resin, the filter may comprise another material as the resin layer 130. Further, the resin layer 130 may be formed using another method as long as on the resin layer is directly formed on the EMI shielding layer 120.
As illustrated in
The multiple layer of the anti-reflection layer and the anti-glare layer is formed by coating the anti-glare layer and then coating the anti-reflection layer. A dry coating method or a wet coating method may be used.
As illustrated in
In a case where the adhesive layer 150 comprises at least one of the near infrared ray shielding material, the orange wavelength absorption material, or the color control material, the resin layer 130 can not comprise the material which the adhesive layer 150 comprises.
As above, since the number of function layers and the number of processes for stacking the function layers are reduced, there are an increase in yield rate of production and a reduction in production cost of the display apparatus.
As illustrated in
The EMI shielding layer 320 is directly formed on the base film layer 110. Accordingly, an adhesive layer necessary to form the EMI shielding layer 320 on the base film layer 110 can be removed.
The EMI shielding layer 320 is formed in a conductive type. The conductive type EMI shielding layer 320 has a stacking structure ((DMD)n) of a dielectric layer D and a metal layer M.
The dielectric layer D is formed of a transparent conductive material such as indium-tin-oxide (ITO) and ZnO. The metal layer M is formed of a metal with low resistance such as Ag. As a value of “n” in the stacking structure ((DMD)n) increases (i.e., the number of layers for forming the EMI shielding layer 320 increases), while a resistance of the EMI shielding layer 320 is reduced, production cost increases. Therefore, an optimum value of “n” is determined in consideration of the above conditions.
Since the conductive type EMI shielding layer 320 has not only an EMI shielding function but also a near infrared absorption function, the resin layer 330 may not comprise a near infrared shielding material.
In this case, the conductive type EMI shielding layer 320 is formed by repeatedly stacking Ag and ITO using a sputtering method.
As illustrated in
The plasma display panel comprises a front panel 410 and a rear panel 420 which are coupled in parallel to oppose to each other at a given distance therebetween. The front panel 410 comprises a front substrate 401 which is a display surface displaying an image. The rear panel 420 comprises a rear substrate 411 constituting a rear surface. A plurality of scan electrodes 402 and a plurality of sustain electrodes 403 are formed in pairs on the front substrate 101 to form a plurality of maintenance electrode pairs. A plurality of address electrodes 413 are arranged on the rear substrate 411 to intersect the plurality of maintenance electrode pairs.
The scan electrode 402 and the sustain electrode 403 each comprise transparent electrodes 402a and 403a made of a transparent ITO material and bus electrodes 402b and 403b made of a metal material. The scan electrode 402 and the sustain electrode 403 are covered with an upper dielectric layer 404, and a protective layer 405 is formed on the upper dielectric layer 404.
The rear panel 420 comprises barrier ribs 412 for partitioning discharge cells. The plurality of address electrodes 413 are arranged in parallel to the barrier ribs 412. Red (R), green (G) and blue (B) phosphors 414 are coated on the address electrodes 413.
A lower dielectric layer 415 is formed between the address electrodes 413 and the phosphors 414.
The barrier ribs 412 formed between the front panel 410 and the rear panel 420 form unit discharge cell or discharge cells. Each discharge cell is filled with an inert gas containing a main discharge gas such as neon (Ne), helium (He) or a mixture of Ne and He, and a small amount of xenon (Xe).
When the plasma display panel is discharged by a high frequency voltage, the inert gas generates vacuum ultraviolet rays, which thereby cause the phosphors 414 formed between the barrier ribs 412 to emit light, thus displaying an image.
A frame (not illustrated) and a driver (not illustrated), and the like, are installed on the rear surface of the plasma display panel to manufacture a plasma display module. A case (not illustrated) for determining an outward shape is installed in the plasma display module to complete the plasma display apparatus.
Since the plasma display apparatus with the above-described structure displays the image due to the application of the high frequency voltage for generating a plasma discharge, electromagnetic waves emitted through the display surface of the plasma display apparatus is much more than those in color ray tubes (CRTs) or liquid crystal displays (LCDs).
The plasma display apparatus emits near infrared rays induced from the inert gas such as Ne and Xe, and a wavelength of the near infrared rays is very close to a wavelength of a remote controller of electric home appliances. Therefore, it is likely to cause the malfunction of the electric home appliances. Further, the quantity of light with an orange wavelength emitted from the plasma display apparatus is more than that in the display apparatuses such as the CRT and the LCD because of characteristics of the phosphor of the plasma display apparatus.
Accordingly, the plasma display apparatus according to an embodiment comprises the filter for the display apparatus illustrated in
The filter 500 of the plasma display apparatus according to an embodiment comprises a base film layer, an EMI shielding layer directly formed on the base film layer, and a resin layer, directly formed on the EMI shielding layer, comprising at least one of a near infrared ray shielding material, an orange wavelength absorption material or a color control material.
Since the structure and a manufacturing method of the filter 500 are fully described in
In the filter 500 for the display apparatus according to an embodiment, function layers for improving the plasma display apparatus are not manufactured separately, and the function layers are directly formed on one base film layer.
The filter used in the plasma display apparatus is required to have more functions than filters used in the display apparatuses.
Accordingly, since the plasma display apparatus comprises the filter for the display apparatus according to an embodiment, there are an increase in yield rate of production and a reduction in production cost of the plasma display apparatus.
The foregoing embodiments and advantages are merely exemplary and are not to be construed as limiting the present invention. The present teaching can be readily applied to other types of apparatuses. The description of the foregoing embodiments is intended to be illustrative, and not to limit the scope of the claims. Many alternatives, modifications, and variations will be apparent to those skilled in the art.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2006-0039059 | Apr 2006 | KR | national |
