KR101776321B1 - Touch Screen and display apparatus having the touch screen - Google Patents

Abstract

A touch screen according to an embodiment of the present invention includes a substrate; A first ITO film adhered onto the substrate, wherein at least one electrode is formed; A second ITO film disposed on the first ITO film and having at least one electrode formed thereon; And a 3D polarizing film disposed on the substrate.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a touch screen and a display device including the touch screen.

The present invention relates to a touch screen, and more particularly, to a touch screen and a display device including the touch screen.

 2. Description of the Related Art Conventionally, two dimensions (2D) displays have been generally used. Recently, attention has been increasingly focused on three-dimensional (3D) images or stereoscopic displays for the same. There is a growing demand for display devices that display dimensional contents.

The display device has a filter therein and displays an image in which a left image and a right image are separated through the provided filter.

That is, as disclosed in Patent No. 10-0753517, the display device may provide a stereoscopic image using a display panel having a built-in 3D filter, or may be provided with a slit array plate 3D filter) is provided, and a stereoscopic image is provided through the slit array plate.

The above-mentioned display device provides stereoscopic images by installing a 3D filter inside the product at the product production stage.

That is, according to the related art, a stereoscopic image can be provided only when a 3D filter for implementing a stereoscopic image is installed inside a product in a product production stage, and a stereoscopic image can not be provided in a display device without a 3D filter installed .

The embodiments of the present invention provide a touch panel capable of using a 3D function even in a display device that does not currently support the 3D function and a display device using the touch panel.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise forms disclosed. .

A touch screen according to an embodiment of the present invention includes a substrate; A first ITO film disposed on the substrate and having at least one electrode formed thereon; A second ITO film disposed on the first ITO film and having at least one electrode formed thereon; And a 3D polarizing film disposed on the substrate.

Further, the 3D polarizing film is adhered to the lower surface of the substrate, or disposed inside the substrate.

Further, the substrate includes a first region forming an upper portion and a second region forming a lower portion, and the 3D polarizing film is disposed in a second region of the substrate.

In addition, the widths of the first region and the second region are equal to each other, or the width of the first region is greater than the width of the second region.

In addition, the 3D polarizing film includes a film-type patterned retarder (FPR) film.

A display device according to an embodiment of the present invention includes a display module; A touch screen formed on one surface of the display module, the touch screen including a touch panel for sensing a touch and a 3D polarizing film for realizing a stereoscopic image; And a cabinet for protecting the display module and the touch screen.

In addition, the touch screen is disposed at a distance from the display module.

In addition, the touch screen has a '-' shape having the same width as the top and bottom surfaces, and the 3D polarizing film is disposed at the lowermost part of the touch screen.

Also, the touch screen is formed in a 'T' shape including a first region having a first width and a second region having a second width smaller than the first width, As shown in FIG.

One end of the second area of the touch screen is inserted into one end of the display module.

The touch panel may include a substrate, a first ITO film disposed on the substrate and having at least one electrode formed thereon, a second ITO film disposed on the first ITO film and having at least one electrode formed thereon, Film and a 3D polarizing film disposed on the two ITO films.

In addition, the 3D polarizing film includes a film-type patterned retarder (FPR) film.

According to the embodiments of the present invention, it is possible to provide a stereoscopic image function at a low cost by providing a touch panel capable of realizing a stereoscopic image.

In addition, according to the embodiment of the present invention, the touch panel is formed in the "T" shape to minimize the interval between the display panel and the touch panel, thereby reducing the scattering of the image and providing an image of optimal quality.

1 is a view showing a display device according to the prior art.
2 is an overall perspective view of a display device according to an embodiment of the present invention.
3 is a view for explaining a display module according to an embodiment of the present invention in more detail.
4 is a view for explaining a touch screen according to the first embodiment of the present invention.
5 is a view for explaining a touch screen according to a second embodiment of the present invention.
6 is a view illustrating a panel structure of a touch screen according to an embodiment of the present invention.
7 is a plan view of an upper plate and a lower plate of a touch screen according to an embodiment of the present invention.
8 is a view for explaining a touch detection method of a touch screen according to an embodiment of the present invention.

The proposed embodiment will be described.

Hereinafter, the present invention will be described in detail with reference to the drawings. It should be understood, however, that there is no intention to limit the scope of the present invention to the embodiment shown, and other embodiments which are degenerative by adding, changing or deleting other elements or other embodiments falling within the spirit of the present invention Can be proposed.

Although the term used in the present invention is a general term that is widely used at present, there are some terms selected arbitrarily by the applicant in a specific case. In this case, since the meaning is described in detail in the description of the corresponding invention, It is to be understood that the present invention should be grasped as a meaning of a non-term.

That is, in the following description, the word 'comprising' does not exclude the presence of other elements or steps than those listed.

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

2, a display device 200 according to an exemplary embodiment of the present invention includes a touch panel 240, a display module 250, a front panel 210, a panel fixing portion 230, (260), and an adhesive member (220).

The display module 250 displays an image according to a signal input to the display device 200. The display module 250 may be a liquid crystal display (LCD) module.

The touch screen 240 includes a 3D film for realizing a stereoscopic image, detects a contact position according to a user's touch, and outputs information corresponding to the detected contact position.

The front panel 210 forms an external appearance of the front of the display device 200. For example, an opening (not shown) may be formed for viewing an image provided through the display module 250, May be provided in the form of a plate of a transparent material.

The inner surface 211 of the front panel 210 faces the rear of the display device 210 and the panel fixing portion 230 is fixed to the adhesive surface 212 of the inner surface 211 by the adhesive member 220. [ Is fixed. An opaque film layer (not shown) for preventing the panel fixing part 230 from being exposed to the front surface of the display module 250 and an electromagnetic wave generated from the display module 250 (Not shown) for preventing the display device 200 from being diverted to the outside.

The panel fixing part 230 may be formed of a square frame having an opening therein and the panel fixing part 230 may be fixed to the panel fixing part 230, Provides a fixed position of the front panel 210 with respect to the display module 250 and the rear cabinet 260 and forms the lateral appearance of the display device 200.

A fixing portion 231 for fixing the touch screen 240, the display module 250 or the back cabinet 260 is formed on one side of the panel fixing portion 230 facing the rear of the display device 200 do.

The adhesive member 220 is provided in a shape corresponding to the adhesive surface 212 of the front panel 210 and one side of the adhesive member 220 is bonded to the panel fixing portion 230, The back surface of the front panel 220 is adhered to the adhesive surface 212 of the front panel 210.

3 is a view for explaining a display module according to an embodiment of the present invention in more detail.

3, the display module 250 according to the present embodiment includes a display panel 251 disposed on the front surface of the display module 250 and displaying an image, a panel guide 251 on which the display panel 251 is mounted A backlight unit 254 disposed behind the display panel 251 to provide a light source and a light source provided in the backlight unit 254 to be provided to the display panel 251 in a processed state And a bottom cover 255 which forms a back surface of the display module 250. The bottom cover 255 is formed of an optical sheet 253,

4 is a view for explaining a touch screen according to the first embodiment of the present invention.

Referring to FIG. 4, the touch screen 240 according to the first embodiment of the present invention includes a 3D film 241 for implementing a stereoscopic image, and a touch panel 242 for sensing a touch operation to detect a touch point do.

The touch screen 240 is disposed on the upper side of the display module 250 and the touch screen 240 and the display module 250 are protected by the rear cabinet 260.

At this time, the touch screen 240 and the display module 250 are spaced apart from each other by a predetermined distance D. The predetermined interval is preferably 0.5 mm.

The reason why the touch screen 240 and the display module 250 are spaced apart from each other by a predetermined distance D is to more easily seat the touch screen 240. In addition, A separate protective film may be attached.

A 3D film 241 for realizing the stereoscopic image is disposed at the bottom of the touch screen 240 having a general plate shape, do.

The 3D film 241 is disposed at the lowermost end of the touch screen 240, that is, in the area closest to the display module 250. The reason why the 3D film 241 is arranged as described above is that when the distance between the touch screen 240 and the display module 250 is increased, the scattering phenomenon of the image outputted from the display module 250 So that the distance between the display module 250 and the 3D film 241 is minimized in order to minimize scattering of the image.

As described above, by embedding the 3D film 241 in the touch screen 240, a touch function and a stereoscopic image function can be easily provided even in a display device in which a conventional stereoscopic image function is not provided.

Meanwhile, the 3D film 241 is a polarizing film, and for example, a film-type patterned retarder (FPR) film can be used.

5 is a view for explaining a touch screen according to a second embodiment of the present invention.

Referring to FIG. 5, the touch screen 240 has a shape different from that of the touch screen according to the first embodiment.

That is, if the touch screen is formed in a general plate shape as in the first embodiment, the interval between the 3D film 241 and the display panel 250 is minimized, Scattering phenomenon may occur.

Accordingly, in the second embodiment of the present invention, the touch screen 240 is formed to have a "T" shape other than a general plate shape as in the first embodiment.

That is, the touch screen 240 includes a region in which the touch panel 242 is formed and a region in which the 3D film 241 is formed. The width of the region in which the 3D film 241 is formed corresponds to the width 242 are formed.

The distance between the 3D film 241 and the display module 250 can be minimized by making the width of the area where the 3D film 241 is formed smaller than the width of the area where the touch panel 242 is formed, .

More specifically, the touch screen 240 may be divided into a first area a and a second area b. The second region b is a lower region and the distance between the second region b and the display module 250 is greater than the distance between the first region a and the display module 250 small.

In addition, the first region a has a width larger than that of the second region b, and accordingly, the touch screen 240 has a "T" shape. At this time, the 3D film 241 is inserted into the second region b of the touch screen 240.

At this time, the second region (b) is inserted at a predetermined distance inward from both ends of the display module (250). A space for forming a seating space of the touch screen 240 is formed between the first area a and the display module 250 as the second area b is drawn inward from both ends of the display module 250. [ 250).

The distance between the 3D film 241 inserted into the touch screen 240 and the display module 250 can be minimized by forming the touch screen 240 to have a T shape, A seating space for seating the touch screen 240 can be provided.

6 is a view illustrating a panel structure of a touch screen according to an embodiment of the present invention.

6, the resistive touch panel 242 includes an upper ITO (Indium Tin Oxide) film 2421, a lower ITO film 2422, the upper ITO film 2421 and the lower ITO film 2422 And a plastic substrate 2425 disposed under the lower ITO 2422 film. The dot spacers 2423 are disposed between the upper ITO film 2423 and the upper ITO film 2423.

At this time, since the touch panel 242 is generally used, a detailed description thereof will be omitted.

However, in the present invention, since the touch panel 242 and the 3D film 241 constitute the touch screen 240 and the touch screen 240 has a T shape, It is preferable that the lower region 2425 is divided into an upper region and a lower region and a width of the lower region is formed larger than a width of the upper region. It is preferable that the 3D film 241 is inserted into the plastic substrate 2425 of the lower area having a small width.

FIG. 7 is a plan view of an upper plate and a lower plate of a touch screen according to an embodiment of the present invention, and FIG. 8 is a view for explaining a touch detection method of a touch screen according to an embodiment of the present invention.

As shown in FIG. 7A, the upper plate is composed of an upper ITO film 2421, and first and second electrodes 2425 and 2426 for applying a voltage are disposed at both ends of the upper ITO film 2421 do. Similarly, as shown in FIG. 7B, the lower plate is composed of a lower ITO film 2422, and electrodes 2427 and 2428 for applying a voltage are disposed at both ends of the lower ITO film 2422. The upper plate and the lower plate are arranged so as to be perpendicular to each other. the upper ITO film 2421 of (a) and the lower ITO film 2422 of (b) are separated from each other by the dot spacers 2423. the upper ITO film 2421 of (a) is in contact with the lower ITO film 2422 of (b).

It is assumed that the upper ITO film 2421 is for measuring the x direction coordinate and the lower ITO film 2422 is for measuring the y direction coordinate.

To measure x-direction coordinates, a voltage V1 is applied to one electrode 2425 of the upper ITO film 2421 of (a), and the other electrode 2426 is grounded. If there is no touch, the voltage Vx measured at an arbitrary point x is as follows.

(식 1)_

(Equation 1)

Where a is the width of the upper ITO film 2421.

If there is no touch, the value is the same as above. However, if there is a touch, the voltage value to be measured changes, and the touch point can be detected from the change of the measured voltage value. At this time, the voltage value measurement can be performed on the electrodes 2427 and 2428 of the lower ITO film 2422 instead of the upper ITO film 2421.

The y-directional coordinates of the touch point can be changed by changing the roles of the upper ITO film 2421 and the lower ITO film 2422 in the x-direction measurement described above.

That is, the voltage V1 is applied to one electrode 2427 of the lower ITO film 2422 and the other electrode 2428 is grounded to measure the y direction coordinate. Since the upper ITO film and the lower ITO film have a uniform resistance as a whole, the voltage value corresponding to the distance from the electrode 2427 exhibits a linear functional relationship, and the voltage Vy measured at an arbitrary point y is As follows.

(식 2)

(Equation 2)

Where b is the y-direction width of the lower ITO film 2422.

If there is no touch, the value is the same as above. However, if there is a touch, the voltage value to be measured changes, and the touch point can be detected from the change of the measured voltage value. At this time, the measurement of the voltage value can be similarly performed on the electrodes 2425 and 2426 of the upper ITO film 2421 instead of the lower ITO film 2422.

As described above, according to the embodiment of the present invention, it is possible to provide a three-dimensional image function at a low cost by providing a touch panel capable of realizing a stereoscopic image.

In addition, according to the embodiment of the present invention, the touch panel is formed in the "T" shape to minimize the interval between the display panel and the touch panel, thereby reducing the scattering of the image and providing an image of optimal quality.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

210: front panel
220:
230:
240: touch panel
250: Display module

Claims (14)

Board;
A first ITO film disposed on the substrate and having at least one electrode formed thereon;
A second ITO film disposed on the first ITO film and having at least one electrode formed thereon; And
And a stereophonic polarizing film embedded in the substrate,
Wherein:
A lower region in which the stereoscopic polarizing film is disposed, and an upper region on the lower region,
The upper region having a first width,
Wherein the lower region has a second width that is narrower than the first width. The method according to claim 1,
The lower surface of the three-
And is exposed through a lower surface of the substrate. delete delete delete delete The method according to claim 1,
Wherein the stereolithographic polarizing film comprises a film-type patterned retarder (FPR) film. A display module;
A touch screen disposed on the display module, the touch screen including a touch panel and a stereoscopic polarizing film; And
And a cabinet for protecting the display module and the touch screen,
The stereoscopic polarizing film may be formed,
A touch panel,
The touch panel includes:
A first region in which the three-dimensional polarizing film is embedded,
And a second region excluding the first region,
Wherein the first region comprises:
And has a width narrower than that of the second region. 9. The method of claim 8,
The lower surface of the three-
And is exposed through a lower surface of the touch panel to be in contact with an upper surface of the display module. 9. The method of claim 8,
The stereoscopic polarizing film may be formed,
Wherein the width of the first region is narrower than the width of the first region. 9. The method of claim 8,
Wherein the first region comprises:
Wherein the display module has a width narrower than the width of the display module. delete 9. The method of claim 8,
The touch panel includes:
A substrate including a lower region in which the three-dimensional polarizing film is embedded and an upper region on the lower region;
A first ITO film disposed on the upper region of the substrate and having at least one electrode formed thereon,
A second ITO film disposed on the first ITO film and having at least one electrode formed thereon,
Wherein the first region comprises:
A lower region of the substrate,
Wherein the second region comprises:
Wherein the second region is an area including the upper region, the first ITO film, and the second ITO film. 9. The method of claim 8,
Wherein the stereolithographic polarizing film comprises a film-type patterned retarder (FPR) film.

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