KR101103789B1 - Transparency film and display appartus having the same - Google Patents

Transparency film and display appartus having the same Download PDF

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Publication number
KR101103789B1
KR101103789B1 KR1020100086047A KR20100086047A KR101103789B1 KR 101103789 B1 KR101103789 B1 KR 101103789B1 KR 1020100086047 A KR1020100086047 A KR 1020100086047A KR 20100086047 A KR20100086047 A KR 20100086047A KR 101103789 B1 KR101103789 B1 KR 101103789B1
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KR
South Korea
Prior art keywords
recognition code
code pattern
coordinate recognition
transparent film
display panel
Prior art date
Application number
KR1020100086047A
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Korean (ko)
Inventor
김영석
Original Assignee
전자부품연구원
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Priority to KR1020100086047A priority Critical patent/KR101103789B1/en
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Publication of KR101103789B1 publication Critical patent/KR101103789B1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

PURPOSE: A transparent film and a display device are provided to embody the input function of a touch screen since a transparent film including a coordinate recognition code pattern is attached on a display panel. CONSTITUTION: A display panel(100) is defined as a pixel area and a black matrix area. A transparent film(200) comprises a coordinate recognition code pattern(210) of a barcode type recognized as position coordinates through an external device. The coordinate recognition code pattern is formed on the black matrix area except the area overlapped with the pixel area. The external device is an infrared pen and irradiates infrared ray as the coordinate recognition code pattern, thereby recognizing the coordinates in which the patterns are formed.

Description

Transparent film and display device having same {TRANSPARENCY FILM AND DISPLAY APPARTUS HAVING THE SAME}

The present invention relates to a transparent film and a display device having the same, and more particularly, by forming a coordinate recognition code for recognizing coordinates on a transparent film, by recognizing the code using an external device such as an IR pen, A transparent film performing a touch screen function and a display device having the same.

In general, the touch panel is installed on the display surface of an image display device such as a cathode ray tube (CRT), a liquid crystal display (LCD), a plasma display panel (PDP), an electroluminescence (EL), and the like. It is a computer peripheral device that inputs predetermined information into a computer by pressing an indium tin oxide (ITO) film.

In the case of the conventional touch panel, in order to implement an input function, a transparent electrode material such as ITO for location recognition is used. However, a transparent electrode material such as ITO has a transmittance of about 80% to 90%, and when applied to a device using external light such as an e-book or a low transmittance, there is a problem in that the application is reduced in visibility.

In addition, in the case of the conventional touch panel, several layers such as a protective film are additionally required in addition to the transparent electrode material as described above, thereby increasing the manufacturing cost.

Accordingly, it is an object of the present invention to provide a transparent film that can reduce the manufacturing cost at the same time without lowering the visibility in implementing a touch screen.

Another object of the present invention is to provide a display device having the transparent film.

In order to achieve the above object, a transparent film according to an aspect of the present invention is attached to a display panel on which a plurality of pixel regions arranged in a matrix form are defined in order to implement a touch screen function. And a coordinate recognition code pattern patterned on the film and the base film and patterned between the pixel area and the pixel area defined in the display panel.

In this transparent film, the coordinate recognition code pattern is patterned in a form having a step on the base film. In this case, the coordinate recognition code pattern patterned in the form having the step is characterized in that the base film is made of a one-piece.

In addition, the base film has a first refractive index, and the coordinate recognition code pattern is made of a material having a second refractive index different from the first refractive index, it may be patterned in the form having a step on the base film.

The coordinate recognition code pattern may be patterned on a black matrix area defined between the pixel area defined in the display panel and the pixel area.

According to another aspect of the present invention, a display device includes a pixel area and a black matrix area adjacent to the pixel area defined on a display panel and the black matrix area of the display panel, and are recognized as position coordinates through an external device. It includes a transparent film formed with a coordinate recognition code pattern.

Here, the coordinate recognition code pattern is characterized in that printed on the transparent film in the form of a bar code according to a printing technique. In addition, the coordinate recognition code pattern may be formed by micro-patterning in a stepped form on the transparent film.

In addition, the display device according to another aspect of the present invention may further include an external device that recognizes the coordinates of the position where the coordinate recognition code pattern is formed by irradiating light to the coordinate recognition code pattern, for example, may be an infrared pen. .

According to the present invention, an input of a touch screen capable of recognizing the coordinate recognition code pattern through an external device such as an infrared pen by simply attaching a transparent film on which a coordinate recognition code pattern of the present invention is formed on a key display panel. The functionality can be implemented.

Therefore, in the implementation of the touch screen display device, the transparent film of the present invention needs only to be attached on the display panel, so that the manufacturing is easy and the overall manufacturing cost can be reduced. In addition, the coordinate recognition code pattern is not formed evenly and uniformly distributed over the entire area of the transparent film, and is disposed at regular intervals in consideration of the position of the pixel area defined in the display panel, thereby preventing a decrease in transmittance. can do.

1 is a perspective view illustrating a display device having a transparent film according to an embodiment of the present invention.
FIG. 2 is a plan view of the display device shown in FIG.
3 is a cross-sectional view of the display device cut along the cutting lines I1-I2 illustrated in FIG. 2.
4 is a cross-sectional view of a transparent film showing another embodiment of the coordinate recognition code pattern shown in FIGS. 1 to 3.

The present invention forms a coordinate recognition code for recognizing coordinates on the transparent film to enable an input function, and recognizes the formed coordinate recognition code by using an external device such as an infrared pen, thereby enabling the role of a touch screen. When the present invention is applied to a general display device, an e-paper, or the like, the transparent structure of the present invention has a simple structure in which a coordinate recognition code is formed instead of the transparent electrode material and various protective films used for position recognition. By simply attaching a film on an existing display panel, an input function that is a role of a touch screen may be implemented.

As such, since the transparent film having the coordinate recognition code of the present invention is attached only to the display panel using an adhesive means such as an adhesive, the manufacturing cost and the entire manufacturing process can be simplified.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed subject matter is thorough and complete, and that the spirit of the invention will be fully conveyed to those skilled in the art. In the drawings, the thicknesses of layers and regions are exaggerated for clarity, and like reference numerals denote like elements throughout the specification.

1 is a perspective view illustrating a display device having a transparent film according to an embodiment of the present invention, FIG. 2 is a plan view of the display device shown in FIG. 1, and FIG. 3 is a cut line I 1 -I 2 of FIG. 2. It is the cross section which cut according to.

1 to 3, the display device 300 according to the exemplary embodiment of the present invention is largely formed on the display panel 100 and the display panel, and has a coordinate recognition code pattern 210 having a transparent film 200. In the present embodiment, the display panel is a liquid crystal display panel as an example.

In the display panel 100, a pixel area PEA and a black matrix BM1 area adjacent to the pixel area PEA are defined. The position at which the coordinate recognition code pattern is formed in the transparent film 200 is determined based on this defined black matrix BM1 region.

In detail, the display panel 100 includes a first substrate 110 and a second substrate 170 which are disposed to be spaced apart at predetermined intervals. The thin film transistor T1 and the pixel electrode PE1 may be provided on the first substrate 110, and the color filter CF1 and the common electrode CE1 may be provided on the second substrate 170. A liquid crystal layer 140 composed of a plurality of liquid crystal molecules may be interposed between the first substrate 100 and the second substrate 170.

In more detail, the gate electrode G1 may be provided on the first substrate 100, and the gate insulating layer GI1 covering the gate electrode G1 may be provided. The channel layer C1 may be provided on the gate insulating layer GI1 above the gate electrode G1, and the source electrode S1 and the drain electrode D1 are respectively provided in contact with both ends of the channel layer C1. Can be. The thin film transistor T1 may include the gate electrode G1, the gate insulating layer GI1, the channel layer C1, the source electrode S1, and the drain electrode D1.

The pixel electrode PE1 is connected to the source electrode S1 of the thin film transistor T1. The pixel electrode PE1 may have a structure extending to one side of the source electrode S1. The pixel electrode PE1 defines a pixel area.

Although FIG. 3 illustrates a thin film transistor T1 having a bottom gate structure, the thin film transistor T1 may be transformed into a top gate or double gate structure. The connection method between the thin film transistor T1 and the pixel electrode PE1 may also vary.

A black matrix BM1 having a predetermined opening area may be provided on a lower surface of the second substrate 200. The coordinate recognition code pattern 210 formed on the transparent film 200 is positioned on the black matrix BM1. The color filter CF1 may be provided on a bottom surface of the second substrate 200 on which the black matrix BM1 is not formed. The color filter CF1 may extend onto the black matrix BM1. The common electrode CE1 may be provided on the bottom surface of the color filter CF1. The common electrode CE1, the pixel electrode PE1, and the liquid crystal layer 150 therebetween may constitute a kind of capacitor.

In order to add a touch screen function to the display panel 100, a transparent film 200 according to an exemplary embodiment of the present invention is attached to the display panel 200.

The transparent film 200 may be a transparent material made of a transparent plastic material, for example, polycarbonate (PC), polyimide (PI), polyethersulfone (PES), polyarylene having excellent optical properties Thermoplastic polymers such as polyarylate (PAR), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), cycloolefin copolymer, and thermosetting polymers such as epoxy and unsaturated polyester It can be made of a resin.

Coordinate recognition code patterns are formed on the transparent material. As shown in FIG. 2, the coordinate recognition code pattern is formed in a form capable of identifying coordinates, such as a bar code. Coordinate recognition codes in the form of bar codes may be printed (printed) on the transparent material according to a predetermined printing technique.

A method for identifying coordinates using a bar code type coordinate recognition code pattern may be recognized through an external device such as an infrared pen such as an infrared sensor. That is, the coordinate recognition code pattern in the barcode form is scanned by using the infrared light emitted from the infrared pen, and the scanned result is obtained as the corresponding coordinate recognition data.

Meanwhile, when the transparent film 200 having the coordinate recognition code pattern 210 is attached to the display panel 100, the display panel 100 and the transparent film of the present invention are coupled by the coordinate recognition code pattern 210. There is a possibility that the overall transmittance of the display device 300 is lowered.

Accordingly, in the present invention, the coordinate recognition code pattern 210 is regularly positioned at a specific position of the transparent film 200 so that the coordinate recognition code pattern 210 does not overlap with the pixel area PEA of the display panel 100 disposed below. Patterned to be arranged as For example, by regularly arranged to be formed on the black matrix area BM1 adjacent to the pixel area of the display panel 100, a touch screen function capable of a coordinate input function may be implemented without reducing the overall transmittance.

4 is a cross-sectional view of a transparent film showing another embodiment of the coordinate recognition code pattern shown in FIGS. 1 to 3.

Referring to FIG. 4, the coordinate recognition code pattern according to another embodiment of the present invention is different from the coordinate recognition code pattern illustrated in FIGS. 1 to 3 formed on a transparent material through a printing technique, in the process of manufacturing a transparent film. It is patterned in a pattern with a step that can be recognized by an external device such as a pen. That is, the transparent material corresponding to the base film and the coordinate recognition code pattern according to another embodiment of the present invention are integrally patterned. In this case, the printing process for forming the coordinate recognition coat pattern shown in Figs. 1 to 3 can be omitted, so that the number or processing time of the entire manufacturing process can be shortened.

In another embodiment, an external device such as an infrared pen may recognize a coordinate recognition code by patterning a material having a refractive index different from that of the base film in a bar code form on a transparent base film. That is, a structure capable of recognizing coordinates by providing a base film having a first refractive index and forming a coordinate recognition code pattern on a material having a second refractive index having a refractive index different from the first refractive index on the base film. To form. In this case, some scattering of light may be caused by a coordinate recognition code pattern having different refractive indices formed on the transparent material for coordinate recognition, but the coordinate recognition codes having different refractive indices are not formed with a high overall density of the base film, but with an infrared pen. As shown in FIGS. 1 and 2 within a level that can be recognized by the same external device, the coordinate input function can be enabled without greatly reducing the transmittance.

As described above, in the present invention, a coordinate recognition code for recognizing coordinates is formed on the transparent film so as to enable an input function, and the transparent film is attached to the display panel. In addition, a touch screen display device having a coordinate input function may be implemented by recognizing a coordinate recognition code by using an external device such as an infrared pen.

When the present invention is applied to a general display device, an e-paper, or the like, the transparent structure of the present invention has a simple structure in which a coordinate recognition code is formed instead of the transparent electrode material and various protective films used for position recognition. By simply attaching a film on an existing display panel, an input function that is a role of a touch screen may be implemented. Therefore, the manufacturing cost can be lowered and the number of manufacturing processes can be lower than that of the conventional display device having a touch screen function. In addition, since the coordinate recognition code pattern is formed on the black matrix area of the display panel so that the transmittance does not decrease, the touch screen function may be performed without degrading the visibility.

The configuration of the present invention has been described above through the preferred embodiments and the accompanying drawings. However, these are only examples and are not used to limit the scope of the present invention. Those skilled in the art will understand from this that various modifications and equivalent other embodiments are possible. For example, in the present exemplary embodiment, the pattern formed on the transparent film is described in the form of a barcode. However, when the surface of the transparent film is formed in a random pattern like a diffusion plate as a whole instead of the barcode, a random pattern formed at each position is provided. The pattern can function as a unique coordinate recognition code pattern. It can also be used to recognize the location. Therefore, the true scope of protection of the present invention should be defined by the technical spirit of the appended claims.

Claims (10)

A display panel in which a pixel area and a black matrix area adjacent to the pixel area are defined; And
A transparent film formed on the black matrix area of the display panel and having a coordinate recognition code pattern in the form of a barcode recognized as position coordinates through an external device,
The coordinate recognition code pattern is,
And a black matrix area except for an area overlapping the pixel area.
delete The display device of claim 1, wherein the coordinate recognition code pattern is micro patterned in a stepped shape on the transparent film.
The apparatus of claim 1, further comprising an external device that recognizes coordinates of a position at which the recognition pattern is formed by irradiating light onto the coordinate recognition code pattern.
And the external device is an infrared pen.
delete In the transparent film attached to the display panel in which the pixel regions arranged in a matrix form to implement a touch screen function,
Transparent base film; And
A pattern recognition code pattern in the form of a barcode patterned on the base film and patterned between the pixel areas defined in the display panel,
The coordinate recognition code pattern is,
The display is defined between said pixel regions defined on the panel, the transparent film and characterized in that the black matrix formed in the region except for the area in which overlap the pixel region.
The transparent film of claim 6, wherein the coordinate recognition code pattern is patterned to have a step on the base film.
The transparent film of claim 7, wherein the coordinate recognition code pattern and the base film patterned in the shape having the step are integral.
The method of claim 7, wherein
The base film has a first refractive index,
The coordinate recognition code pattern is made of a material having a second refractive index different from the first refractive index, and the transparent film, characterized in that patterned in the form having a step on the base film.
delete
KR1020100086047A 2010-09-02 2010-09-02 Transparency film and display appartus having the same KR101103789B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9170449B2 (en) 2013-01-28 2015-10-27 Samsung Display Co., Ltd. Display device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050072715A (en) * 2004-01-07 2005-07-12 마이크로소프트 코포레이션 Universal computing device
KR100557474B1 (en) * 2002-09-26 2006-03-07 요시다 켄지 Information reproduction method, information inputting and outputting method, information reproduction apparatus, portable information inputting and outputting apparatus and electronic toy using dot pattern
KR20080113832A (en) * 2007-06-26 2008-12-31 (주)이에스비 The electric pen for reading locations having the camera which is taken specific patten images on a liquid crystal display and the electric blackboard using the electric pen
KR20090077350A (en) * 2008-01-11 2009-07-15 정병주 Transparency film coated by transparency positioning pattern responding on specific wavelength band, input device, and using therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100557474B1 (en) * 2002-09-26 2006-03-07 요시다 켄지 Information reproduction method, information inputting and outputting method, information reproduction apparatus, portable information inputting and outputting apparatus and electronic toy using dot pattern
KR20050072715A (en) * 2004-01-07 2005-07-12 마이크로소프트 코포레이션 Universal computing device
KR20080113832A (en) * 2007-06-26 2008-12-31 (주)이에스비 The electric pen for reading locations having the camera which is taken specific patten images on a liquid crystal display and the electric blackboard using the electric pen
KR20090077350A (en) * 2008-01-11 2009-07-15 정병주 Transparency film coated by transparency positioning pattern responding on specific wavelength band, input device, and using therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9170449B2 (en) 2013-01-28 2015-10-27 Samsung Display Co., Ltd. Display device
US9495041B2 (en) 2013-01-28 2016-11-15 Samsung Display Co., Ltd. Display device

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