KR101696483B1 - Organic light emitting diodde desplay device - Google Patents

Abstract

The present invention relates to an organic light emitting diode display device with a touch screen panel capable of reducing thickness, reducing static electricity and improving touch sensitivity, and more particularly, to an array substrate on which an active array for displaying image data is formed using an organic light emitting diode. An encapsulation substrate for encapsulating the active array; A plurality of first electrode rows formed on one surface of the encapsulation substrate and arranged in parallel in a first direction; And a plurality of second electrode lines formed on the other surface of the encapsulation substrate and arranged in parallel in a second direction intersecting with the first electrode lines.

Description

TECHNICAL FIELD [0001] The present invention relates to an organic light emitting diode (OLED) display device,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an organic light emitting diode display device, and more particularly, to an organic light emitting diode display device including a touch screen panel.

The touch panel includes a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), an electroluminescence device (EL) And a computer input device for inputting predetermined information to a computer by pressing (pressing or touching) the touch panel while the user is viewing the image display device.

Depending on the structure, the touch panel can be divided into an add-on type and an on-cell type. The add-on type is a method in which a flat panel display device and a touch panel are separately manufactured, and then a touch panel is attached to a top panel of the flat panel display device. The on-cell type is a method of directly forming the elements constituting the touch panel on the surface of the upper glass substrate of the flat panel display.

The add-on type is a structure in which a completed touch panel is mounted on a flat panel display device, and thus the thickness of the touch panel is increased, and the brightness of the display device becomes dark, thereby reducing visibility.

On the other hand, in the case of an on-cell type, in particular, in the case of an organic light emitting diode display (OLED display), a protective cap for protecting the OLED is provided on the top, Thereby forming touch electrodes for the touch panel.

In the case of the top plate integrated type organic light emitting diode display device, since the electrode columns constituting the touch driving signal transmission channel and the electrode columns constituting the touch recognition signal receiving channel are configured to intersect with each other, an insulating layer for insulating them is required. Which inevitably leads to an increase in thickness.

In addition, when the insulating layer is formed, the electrode columns constituting the receiving channel and the transmitting channel can not but be separated. In this case, a connecting portion for connecting the electrodes to each other is required. Accordingly, when static electricity is generated during the manufacturing process, there is a problem that the electrical load is concentrated on the connection portion and the conductivity of the electrode column is deteriorated.

In addition, conventionally, both the electrode row constituting the touch driving signal transmission channel and the electrode row constituting the touch recognition signal receiving channel are formed only on one side of the protective cap, and the cathode electrode of the OLED is formed on the side where these electrode rows are formed. Therefore, when a voltage is supplied to the cathode electrode, the electrode columns constituting the touch recognition signal receiving channel are influenced thereby, which lowers the sensitivity of the touch recognition.

Accordingly, a need has arisen for a touch screen panel built-in organic light emitting diode display device capable of solving the problems of the related art.

SUMMARY OF THE INVENTION An object of the present invention is to provide a touch screen panel built-in organic light emitting diode display device capable of solving the problem of thickness increase, static electricity during manufacturing process,

According to an aspect of the present invention, there is provided an organic light emitting diode display comprising: an array substrate on which an active array for displaying image data is formed using an organic light emitting diode; An encapsulation substrate for encapsulating the active array; A plurality of first electrode rows formed on one surface of the encapsulation substrate and arranged in parallel in a first direction; And a plurality of second electrode lines formed on the other surface of the encapsulation substrate and arranged in parallel in a second direction intersecting with the first electrode lines.

The organic light emitting diode display device may further include a plurality of organic light emitting diode display devices formed on one surface of the sealing substrate on which the plurality of first electrode lines are formed and connected to the first electrode lines by the plurality of first routing lines, 1 pad.

The organic light emitting diode display device is formed on the other surface of the encapsulation substrate on which a plurality of second electrode lines are formed and includes a plurality of first electrode lines connected to the first electrode lines by a plurality of second routing lines, 1 contact electrodes.

The organic light emitting diode display device may further include a plurality of second contact electrodes formed at positions on the array substrate corresponding to the first contact electrodes of the sealing substrate, And the second pad.

The organic light emitting diode display may further include a sealant for sealing the encapsulation substrate and the array substrate, wherein the first and second contact electrodes, the second electrode columns, So that the active array is positioned.

The organic light emitting diode display further includes an insulating layer covering the plurality of first columns and the plurality of first routing wires formed on one surface of the sealing substrate.

The first electrode lines are reception channels for receiving the touch recognition signal, and the second electrode lines are transmission channels for transmitting a touch driving signal.

The first connection pattern, the first and second routing wirings are formed of any one of Al, AlNd, Mo, MoTi, Cu, CuOx, and Cr, and the first and second electrode lines are formed of any one of ITO and IZO .

According to the embodiment of the present invention, since the electrode columns constituting the touch driving signal transmission channel and the electrode columns constituting the touch recognition signal receiving channel are insulated by the sealing substrate, an additional insulating layer for insulating them is unnecessary . Therefore, since the insulating layer can be omitted, it is possible to reduce the thickness, and the time and cost for the manufacturing process can be reduced.

In addition, since the electrode columns constituting the touch driving signal transmission channel and the electrode columns constituting the touch recognition signal receiving channel are formed in a continuous form without being separated, a connection pattern for connecting the separated electrode columns is unnecessary. Therefore, it is possible to obtain the effect of eliminating the damage caused by the static electricity, which is likely to occur in the manufacturing process.

Also, since the electrode columns are formed on the upper surface of the encapsulation substrate with the touch recognition signal reception channel and the electrode columns formed on the encapsulation substrate are used as the touch driving signal transmission channel, they are not affected by the voltage applied to the cathode electrode. Therefore, it is possible to obtain an effect of further improving the touch recognition rate.

1 is an exploded perspective view of a touch screen panel built-in organic light emitting diode display device according to an embodiment of the present invention,
FIG. 2 is a cross-sectional view of the organic light emitting diode display device shown in FIG. 1,
Figure 3 is a cross-sectional view of the OLED array substrate shown in Figure 2,
4 is an equivalent circuit diagram of the active array shown in Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Like reference numerals throughout the specification denote substantially identical components. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 1 is an exploded perspective view of a touch screen panel built-in organic light emitting diode display device according to an embodiment of the present invention, FIG. 2 is a sectional view of the organic light emitting diode display device shown in FIG. 1, Sectional view, and Fig. 4 is an equivalent circuit diagram of the active array shown in Fig.

1 and 2, an organic light emitting diode display device according to an embodiment of the present invention includes an array substrate 100 on which an active array AA is formed, an encapsulation substrate 200 opposed to the array substrate 100, And a sealant SL joining the array substrate 100 and the encapsulation substrate 200. The touch screen panel TSP may be formed of a transparent resin, As the array substrate 100, a transparent substrate or a metal substrate can be used. As the sealing substrate 200, a transparent substrate may be used. The sealant (SL) is generally an ultraviolet curing agent.

Referring to FIG. 3, an array substrate 100 of an organic light emitting diode display includes a thin film transistor (TFT) formed on a glass substrate (SUBS) and an organic light emitting diode (OLED). The thin film transistor TFT includes a gate electrode G formed on the substrate SUBS, a gate insulating layer GI covering the gate electrode G, a semiconductor layer (not shown) overlapping the gate electrode G on the gate insulating layer GI A source electrode S contacting the one side of the semiconductor layer A and a drain electrode D facing the other side of the semiconductor layer A with a certain distance from the source electrode S, .

A protective layer PAS is formed on the substrate SUBS on which the thin film transistor TFT is formed. An organic light emitting diode (OLED) connected to a thin film transistor (TFT) is formed on the passivation layer (PAS).

The organic light emitting diode OLED includes an anode electrode AN on the protective layer PAS and in contact with the drain electrode D through the drain contact hole. Further, a bank B is further formed on the thin film transistor TFT for planarization. The organic light emitting layer EL is formed on the anode electrode AN in the pixel region where the height of the surface becomes substantially uniform due to the bank B. [ A cathode electrode CA is formed on the entire surface of the substrate SUBS on which the organic light emitting layer EL is formed. The organic luminescent layer will be described in more detail with reference to Fig. 4.

Referring to FIG. 4, the active array AA displays video data including data lines DL, gate lines GL intersecting with the data lines DL, and pixels arranged in a matrix form . Each of the pixels includes an OLED, a driving TFT DT, a switching TFT ST, a capacitor Cst, and the like.

The pixels are supplied with the high-potential power supply voltage VDD and the cathode voltage. The driving TFT DT adjusts the amount of current flowing in the OLED according to the voltage (gate voltage) of the gate electrode to which the data voltage is applied. The switching TFT ST supplies a data voltage from the data line DL to the gate electrode of the driving TFT DT in response to a gate pulse supplied to the gate line GL. The anode electrode AN of the OLED is connected to the drain electrode of the driving TFT DT, and the cathode electrode C of the OLED is supplied with the cathode voltage. The OLED includes an organic light emitting layer (EL).

The organic light emitting layer EL includes a hole injection layer (HIL), a hole transport layer (HTL), an emission layer (EML), an electron transport layer (ETL) injection layer, EIL). When a drive voltage is applied to the anode electrode AN and the cathode electrode CA of the OLED, the holes supplied through the hole injection layer HIL and the hole transport layer HTL, the electron injection layer EIL and the electron transport layer ETL The electrons passed through the light emitting layer (EML) are moved to form excitons, and as a result, the light emitting layer (E) emits visible light.

Meanwhile, since the active array (AA) including the organic light emitting layer vulnerable to moisture is formed on the array substrate (100) of the organic light emitting diode display device according to the present invention, the active array (AA) .

The active array AA is sealed from the external atmosphere by using the encapsulation substrate 200 and the sealant SL and the first and second electrode columns 210 and 240 To form a touch screen panel, thereby having a touch recognition function.

Hereinafter, the touch screen panel (TSP) using the sealing substrate will be described in detail.

As shown in FIGS. 1 and 2, a plurality of first electrode rows 210 arranged in a first direction (for example, an X axis direction) are formed on one surface of the sealing substrate 200. Each of the plurality of first electrode columns 210 has a structure in which a plurality of electrode patterns formed of triangular, square, rhombic, polygonal, etc. are connected in a continuous form, but the present invention is not limited thereto. For example, the shape of the electrode pattern can be made in a variety of different shapes in order to improve touch recognition. The plurality of first electrode rows 210 are connected to a plurality of first routing wirings 220 and connected to a first pad 230 for signal input.

An insulating layer (INS) for protecting the first electrode lines 210 and the first routing lines 220 is formed on the first electrode lines 210 and the first routing lines 220. The first pad 230 serves as a contact portion for signal transmission / reception, and thus may be formed to be exposed from the insulating layer INS.

On the other hand, a plurality of second electrode rows 240 are formed on the other surface of the encapsulation substrate 200, which are arranged in a second direction (for example, the Y axis direction) intersecting the first electrode lines 210. Each of the plurality of second electrode columns 240 has a structure in which a plurality of electrode patterns formed of triangular, square, rhombic, polygonal, etc. are connected in a continuous form, but the present invention is not limited thereto. For example, the shape of the electrode pattern can be made in a variety of different shapes in order to improve touch recognition. The plurality of second electrode lines 240 are connected to the plurality of second routing wirings 250 and the second routing wirings 250 are connected to the second pads 120, And is connected to the substrate contact electrode 260.

In the exemplary embodiment of the present invention, the first and second electrode lines 210 and 240 are formed of a transparent conductive material such as ITO or IZO. Further, the first routing wiring 220 and the second routing wiring 250 may be formed in a single layer or a multi-layer structure. The first and second routing wirings 220 and 250 may be formed of a metal layer such as Al, AlNd, Mo, MoTi, Cu, CuOx or Cr in the case of a single layer. , MoTi, Cu, CuOx, and Cr, and the upper layer is formed of a transparent conductive material such as ITO or IZO.

On the lower substrate SUBS on which the active array is formed, array substrate contact electrodes 110 are formed at positions corresponding to the sealing substrate contact electrodes 260. The array substrate contact electrodes 110 and the signal transmission / A second pad 120 connected by a wiring line is formed.

According to the organic light emitting diode display device according to the embodiment of the present invention, the first electrode rows 210 and the second electrode rows 240 are insulated by the sealing substrate 200, An additional insulating layer for insulating the first electrode lines 210 and the second electrode lines 240 from each other as in the organic light emitting diode display device becomes unnecessary. Therefore, since the insulating layer of the conventional top plate integrated type organic light emitting diode display device can be omitted, it is possible to reduce the thickness and the manufacturing time and manufacturing cost. The first electrode rows 210 formed on the top surface of the sealing substrate 200 may be formed as signal receiving channels for receiving the touch recognition signals and the second electrode rows 240 formed on the bottom surface of the sealing substrate 200 Is used as a signal transmission channel for supplying a touch driving signal, the touch recognition rate can be increased because it is not influenced by the cathode electrode AA formed in the active array AA.

In addition, according to the organic light emitting diode display device according to the embodiment of the present invention, since each of the first electrode lines and the second electrode lines are formed in a continuous form, A connection pattern for connecting the first electrode row or the second electrode row is unnecessary. Therefore, it is possible to obtain an effect of solving the problem of damage caused by static electricity, which is likely to occur in a manufacturing process.

In addition, according to the organic light emitting diode display device according to the embodiment of the present invention, the first electrode lines 210 formed on the top surface of the encapsulation substrate 200 are formed as the reception channels of the touch recognition signals, Since the second electrode lines 240 formed on the bottom surface of the active array AA are used as the touch driving signal transmission channel, the second electrode lines 240 are not affected by the cathode electrode CA formed on the active array AA. Therefore, it is possible to obtain an effect of further improving the touch recognition rate.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

100: array substrate 110: array substrate contact electrode
120: second pad 200: sealing substrate
210: first electrode row 220: first routing wiring
230: first pad 240: second electrode column
250: second routing wiring 260: contact electrode
AA: active array AN: anode electrode
B: bank layer CA: cathode electrode
EL: organic light emitting layer GI: gate insulating layer
INS: insulation layer PAS: protection layer
SUBS: Lower substrate TFT: Thin film transistor

Claims (9)

An array substrate on which an active array for displaying image data is formed using an organic light emitting diode;
An encapsulation substrate for encapsulating the active array;
A plurality of first electrode rows formed on one surface of the encapsulation substrate and arranged in parallel in a first direction;
A plurality of first pads formed on one surface of the encapsulation substrate on which the plurality of first electrode lines are formed and connected to the first electrode lines by a plurality of first routing lines;
A plurality of second electrode rows formed on the other surface of the encapsulation substrate and arranged in parallel in a second direction intersecting with the first electrode columns;
A plurality of first contact electrodes formed on the other surface of the sealing substrate on which the plurality of second electrode lines are formed and connected to the second electrode lines by a plurality of second routing wirings;
A plurality of second contact electrodes formed on the array substrate to correspond to the first contact electrodes of the encapsulation substrate and in contact with the first contact electrodes; And
And second pads formed on the array substrate facing the other surface of the encapsulation substrate and connected to the plurality of second contact electrodes through wirings.
delete delete delete The method according to claim 1,
And a sealant for sealing the encapsulation substrate and the array substrate,
Wherein the first and second contact electrodes, the second electrode lines, and the active array are positioned within an area sealed by the sealant.
6. The method according to claim 1 or 5,
Further comprising an insulating layer covering the plurality of first electrode rows and the plurality of first routing wirings formed on one surface of the encapsulation substrate.
6. The method according to claim 1 or 5,
Wherein the first electrode columns are reception channels for receiving the touch recognition signal and the second electrode columns are transmission channels for transmitting a touch driving signal.
6. The method according to claim 1 or 5,
Wherein the first connection pattern and the first and second routing wirings include any one of Al, AlNd, Mo, MoTi, Cu, CuOx, and Cr.
6. The method according to claim 1 or 5,
Wherein the first and second electrode lines are formed of any one of ITO and IZO.

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