Patent Description:
The present invention relates to a display device, and more particularly to a display device having a touch sensor for securing improved touch-sensing performance.

A touch sensor is an input device through which a user may input a command by selecting instructions displayed on a screen of a display device using a hand or an object. That is, the touch sensor converts a contact position that directly contacts a human hand or an object into an electrical signal and receives selected instructions based on the contact position as an input signal. Such a touch sensor may substitute for a separate input device that is connected to a display device and operated, such as a keyboard or a mouse, and thus the range of application of the touch sensor has continually increased.

In the case in which a touch sensor is disposed on a display device, parasitic capacitance is formed at a region at which the conductive layers of the display device and the touch sensor overlap each other. This parasitic capacitance increases a touch-driving load and deteriorates touch-sensing accuracy. In particular, the shorter the distance between the conductive layer of the display device and the touch sensor, the larger the parasitic capacitance, which makes it difficult to ensure touch-sensing performance.

<CIT> discloses an organic light-emitting display device and a method of manufacturing the same. The organic light-emitting display device includes a touch sensor having a plurality of touch electrodes on an encapsulation stack covering a light-emitting element. The touch electrodes are formed at a low temperature and are crystallized through an annealing process.

<CIT> Al discloses an organic light-emitting diode (OLED) display is disclosed. The OLED display includes a display substrate including a display area configured to display an image and a peripheral area surrounding the display area. The OLED display also includes a thin film display layer formed over the display substrate in the display area and a shielding electrode formed over the entire surface of the thin film display layer. The OLED display further includes an encapsulation substrate formed over the display substrate and a touch electrode layer interposed between the encapsulation substrate and the thin film display layer.

<CIT> Al discloses an organic light-emitting display device.

<CIT> discloses a display module including a display area and a non-display area disposed outside the display area on a plane. The display device layer, includes a base layer, a circuit device layer, a display device layer, a thin film encapsulation layer, and a touch sensing layer.

An invention is defined in the independent claim. Accordingly, the present invention is directed to a display device having a touch sensor that substantially obviates one or more problems due to limitations and disadvantages of the related art.

An object of the present invention is to provide a display device having a touch sensor for securing improved touch-sensing performance.

To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, a display device having a touch sensor includes a shield electrode and a touch electrode, which are sequentially disposed on an encapsulation unit covering a light-emitting element. While a touch-driving signal is applied to the touch electrode, a load free driving signal of which at least one of the phase or the amplitude is the same as that of the touch-driving signal is supplied to the shield electrode, thereby securing improved touch-sensing performance.

Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

<FIG> is a perspective view illustrating an organic light-emitting display device having a touch sensor according to the present invention, and <FIG> is a cross-sectional view illustrating the organic light-emitting display device having a touch sensor illustrated in <FIG>.

The organic light-emitting display device having a touch sensor illustrated in <FIG> and <FIG> includes a plurality of subpixels arranged in a matrix form on a substrate <NUM>, an encapsulation unit <NUM> disposed on the subpixels, a touch electrode <NUM> disposed on the encapsulation unit <NUM>, and a shield electrode <NUM> disposed between the encapsulation unit <NUM> and the touch electrode <NUM>.

The organic light-emitting display device having a touch sensor comprises an active area disposed on the substrate <NUM> and a non-active area disposed adjacent to the active area. The substrate <NUM> is formed of a flexible material such as plastic or glass so as to be foldable or bendable. For example, the substrate <NUM> is formed of polyimide (PI), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (PC), polyethersulfone (PES), polyacrylate (PAR), polysulfone (PSF), or cyclic-olefin copolymer (COC).

The active area displays an image through unit pixels arranged in a matrix form. Each unit pixel includes red, green and blue subpixels, or includes red, green, blue, and white subpixels.

Each of the subpixels includes, as illustrated in <FIG> and <FIG>, a pixel-driving circuit, including a plurality of thin-film transistors <NUM>, and a light-emitting element <NUM> connected to the pixel-driving circuit.

Each of the driving thin-film transistors <NUM> included in the pixel-driving circuit controls the current supplied from a high-voltage supply line to the light-emitting element <NUM> in response to a data signal supplied to a gate electrode of the corresponding driving thin-film transistor <NUM>, thus adjusting the amount of light emitted from the light-emitting element <NUM>.

Such a driving thin-film transistor <NUM>, as illustrated in <FIG>, includes a semiconductor layer <NUM> disposed on a buffer layer <NUM>, a gate electrode <NUM> overlapping the semiconductor layer <NUM> with a gate insulation film <NUM> interposed therebetween, and source and drain electrodes <NUM> and <NUM> formed on an interlayer insulation film <NUM> so as to come into contact with the semiconductor layer <NUM>. Here, the semiconductor layer <NUM> is formed of at least one of an amorphous semiconductor material, a polycrystalline semiconductor material, or an oxide semiconductor material.

The light-emitting element <NUM> includes an anode <NUM>, at least one light-emitting stack <NUM> formed on the anode <NUM>, and a cathode <NUM> formed on the light-emitting stack <NUM>.

The anode <NUM> is electrically connected to the drain electrode <NUM> of the driving thin-film transistor <NUM>, which is exposed through a pixel contact hole penetrating a protective film <NUM> and a pixel planarization layer <NUM>.

The light-emitting stack <NUM> is formed on the anode <NUM> in a light-emitting area that is defined by a bank <NUM>. The light-emitting stack <NUM> is formed by stacking a hole-related layer, an organic emission layer, and an electron-related layer on the anode <NUM> in that order or in the reverse order. In addition, the light-emitting stack <NUM> may include first and second light-emitting stacks, which face each other with a charge generation layer interposed therebetween. In this case, the organic emission layer of any one of the first and second light-emitting stacks generates blue light, and the organic emission layer of the other one of the first and second light-emitting stacks generates yellow-green light, whereby white light is generated via the first and second light-emitting stacks. Since the white light generated in the light-emitting stack <NUM> is incident on a color filter located above or under the light-emitting stack <NUM>, a color image may be realized. In addition, colored light corresponding to each subpixel may be generated in each light-emitting stack <NUM> in order to realize a color image without a separate color filter. That is, the light-emitting stack <NUM> of the red subpixel may generate red light, the light-emitting stack <NUM> of the green subpixel may generate green light, and the light-emitting stack <NUM> of the blue subpixel may generate blue light.

The cathode <NUM> is formed so as to face the anode <NUM> with the light-emitting stack <NUM> interposed therebetween and is connected to a low-voltage supply line.

The encapsulation unit <NUM> prevents external moisture or oxygen from permeating the light-emitting element <NUM>, which is vulnerable to external moisture or oxygen. To this end, the encapsulation unit <NUM> includes at least one inorganic encapsulation layer <NUM> and at least one organic encapsulation layer <NUM>. In the present invention, the structure of the encapsulation unit <NUM> in which the first inorganic encapsulation layer <NUM>, the organic encapsulation layer <NUM> and the second inorganic encapsulation layer <NUM> are stacked in that order will be described by way of example.

The first inorganic encapsulation layer <NUM> is formed on the substrate <NUM>, on which the cathode <NUM> has been formed. The second inorganic encapsulation layer <NUM> is formed on the substrate <NUM>, on which the organic encapsulation layer <NUM> has been formed, so as to cover the upper surface, the lower surface and the side surface of the organic encapsulation layer <NUM> together with the first inorganic encapsulation layer <NUM>.

The first and second inorganic encapsulation layers <NUM> and <NUM> minimize or prevent the permeation of external moisture or oxygen into the light-emitting stack <NUM>. Each of the first and second inorganic encapsulation layers <NUM> and <NUM> is formed of an inorganic insulation material that is capable of being deposited at a low temperature, such as silicon nitride (SiNx), silicon oxide (SiOx), silicon oxide nitride (SiON), or aluminum oxide (Al<NUM>O<NUM>). Thus, since the first and second inorganic encapsulation layers <NUM> and <NUM> are deposited in a low-temperature atmosphere, it is possible to prevent damage to the light-emitting stack <NUM>, which is vulnerable to a high-temperature atmosphere, during the process of depositing the first and second inorganic encapsulation layers <NUM> and <NUM>.

The organic encapsulation layer <NUM> serves to dampen the stress between the respective layers due to bending of the organic light-emitting display device and to increase planarization performance. The organic encapsulation layer <NUM> is formed on the substrate <NUM>, on which the first inorganic encapsulation layer <NUM> has been formed, using a non-photosensitive organic insulation material, such as PCL, acrylic resin, epoxy resin, polyimide, polyethylene or silicon oxycarbide (SiOC), or using a photosensitive organic insulation material such as photoacryl. The organic encapsulation layer <NUM> is disposed in the active area, rather than the non-active area.

A plurality of touch electrodes <NUM> is disposed above the active area of the encapsulation unit <NUM>. Since each of the touch electrodes <NUM> includes a capacitance array formed in the corresponding touch electrode <NUM> itself, the touch sensor may be used as a self-capacitance-type touch sensor that senses variation in capacitance due to a user touch. In this self-capacitance sensing method using the touch electrodes <NUM>, when a driving signal supplied through the touch pad <NUM> is applied to the touch electrodes <NUM> through routing lines <NUM>, electric charges Q are accumulated in the touch sensor. At this time, when a user's finger or a conductive object touches the touch electrodes <NUM>, parasitic capacitance is also sensed by a self-capacitance sensor, whereby a capacitance value varies. Therefore, it is possible to determine the presence or absence of a touch based on variation in the capacitance value between the touch sensor that is touched by the finger and the touch sensor that is not touched by the finger.

To this end, the touch electrodes <NUM> are configured as individual pieces that are divided in first and second directions that intersect each other. Each of the touch electrodes <NUM> is formed to have a size corresponding to a plurality of subpixels in consideration of a touch area of a user. For example, one touch electrode <NUM> has a size that is from several times to several hundred times larger than the size of one subpixel.

Each of the touch electrodes <NUM> is formed in a single-layer or multi-layer structure using a transparent conductive film formed of ITO, IZO, IGZO, or ZnO or using an opaque conductive film formed of opaque metal having high corrosion resistance and acid resistance and excellent conductivity, such as, for example, Ta, Ti, Cu, or Mo. When the touch electrodes <NUM> are formed of opaque metal, the touch electrodes <NUM> are formed in a mesh shape that does not overlap the emission area but overlaps the bank <NUM>, thereby preventing an aperture ratio and transmissivity from being lowered by the touch electrodes <NUM>. Since the mesh-shaped touch electrodes <NUM> have higher conductivity than a transparent conductive film, the touch electrodes <NUM> may be configured as low-resistance electrodes. Thereby, the resistance and capacitance of the touch electrodes <NUM> may be reduced, and the RC time constant may be reduced, which may result in increased touch sensitivity.

Each of the routing lines <NUM>, which is connected to a respective one of the touch electrodes <NUM> in a one-to-one correspondence manner, is formed in any one of a first direction and a second direction. The first direction may be a vertical direction, and the second direction may be a horizontal direction perpendicular to the vertical direction.

In the active area, the routing lines <NUM>, which cross the touch electrodes <NUM>, are disposed so as to overlap the bank <NUM>, thereby preventing the aperture ratio from being lowered by the routing lines <NUM>.

In the non-active area, the routing lines <NUM> are disposed on the upper surface and the side surface of the second inorganic encapsulation layer <NUM>, which is the uppermost layer of the encapsulation unit <NUM>. Thus, even when external oxygen or moisture permeates through the routing lines <NUM>, the oxygen or moisture is blocked by the organic encapsulation layer <NUM> and the first and second inorganic encapsulation layers <NUM> and <NUM>, thereby protecting the light-emitting stack <NUM> from the oxygen or moisture.

As illustrated in <FIG> and <FIG>, each of the routing lines <NUM> includes first and second routing lines <NUM> and <NUM>, which are electrically connected to each other via routing contact holes <NUM>. As shown in <FIG>, a portion of the touch insulation film <NUM> and the second routing lines <NUM> are both disposed on the side surface of the encapsulation unit <NUM> and extend to a pad area of the display device. The touch insulation film <NUM> serves to protect the second routing lines <NUM> on the side surface from external moisture or oxygen, for example, due to the touch insulation film <NUM> covering the second routing lines <NUM> on the side surface, as shown in <FIG>.

As shown in <FIG>, the first routing lines <NUM> and the touch electrode <NUM> are on a same plane or layer, and the second routing lines <NUM> and the shield electrode <NUM> are formed on a same plane or layer. In other words, the first routing lines <NUM> and the touch electrode <NUM> are formed as part of the same layer, and the second routing lines <NUM> and the shield electrode <NUM> are also formed as part of the same layer. The touch electrode <NUM> and the first routing lines <NUM> are disposed in contact with the touch insulation film <NUM>, and the second routing lines <NUM> and the shield electrode <NUM> are disposed in contact with the inorganic encapsulation layer <NUM>.

A plurality of first routing lines <NUM> is disposed so as to be spaced apart from each other in a longitudinal (length) direction of each routing line <NUM>. Each of the first routing lines <NUM>, as illustrated in <FIG> and <FIG>, is formed of the same material as the touch electrodes <NUM> on a touch insulation film <NUM>, and is coplanar with the touch electrodes <NUM>. Thus, the first routing lines <NUM>, which are formed so as to be surrounded by the touch electrodes <NUM>, are disposed so as to be spaced apart from the touch electrodes <NUM>, with a first separation hole <NUM> therebetween. The first separation hole <NUM> is formed around substantially all or at least some of the perimeter of a first routing line <NUM>, as shown in <FIG> for example.

Here, among a plurality of routing lines <NUM>, which extend across the kth (where k is a natural number) touch electrode <NUM>, a first routing line <NUM>, which is connected to the kth touch electrode <NUM>, is directly connected to the corresponding touch electrode <NUM> without a separate contact hole, as illustrated by the top middle first routing line <NUM> in <FIG>. A first routing line <NUM>, which is not directly connected to the kth touch electrode <NUM>, is disposed so as to be spaced apart from the corresponding touch electrode <NUM>, with the first separation hole <NUM> therebetween, as illustrated in the top leftmost and top rightmost first separation holes <NUM> of <FIG>.

Each of the second routing lines <NUM>, as illustrated in <FIG> and <FIG>, is formed of the same material as the shield electrode <NUM> on the second inorganic encapsulation layer <NUM>, and is coplanar with the shield electrode <NUM>. Thus, the second routing lines <NUM>, which are formed so as to be surrounded by the shield electrode <NUM>, are disposed so as to be spaced apart from the shield electrode <NUM>, with a second separation hole <NUM> therebetween. The second separation hole <NUM> may be formed around substantially all or at least some of the perimeter of a second routing line <NUM>, as shown in <FIG> for example.

In order to connect first routing lines <NUM> disposed in different touch electrodes <NUM>, as illustrated in <FIG> and <FIG>, each of the second routing lines <NUM> is disposed between two adjacent ones of the first routing lines <NUM> (see <FIG> in particular). As illustrated in <FIG> and <FIG>, each of the second routing lines <NUM> is exposed through the routing contact holes <NUM> penetrating the touch insulation film <NUM>, and is electrically connected to the first routing lines <NUM>.

Meanwhile, in the configuration illustrated in <FIG>, each one of the first routing lines <NUM> is formed in the region corresponding to a respective one of the touch electrodes <NUM> so as to overlap the shield electrode <NUM>. Thus, each of the second routing lines <NUM> is formed between two adjacent ones of the touch electrodes <NUM> while overlapping two different touch electrodes <NUM> that are disposed adjacent thereto in the vertical (longitudinal, length) direction. In this case, two routing contact holes <NUM> are disposed in the regions in which each routing line <NUM> corresponds to a respective one of the touch electrodes <NUM>. In other words, a first contact hole <NUM> is disposed in a first region in which a first routing line <NUM> and a second routing line <NUM> overlap, and a second contact hole <NUM> is disposed in a second region in which a different first routing line <NUM> and the same second routing line <NUM> overlap, as shown in <FIG>. In this case, the second routing line <NUM> corresponds to two different touch electrodes <NUM> and overlaps two different first routing lines <NUM>. Thus, the first and second routing lines <NUM> and <NUM> are electrically connected to each other via two routing contact holes <NUM> in the regions corresponding to a respective one of the touch electrodes <NUM>.

In the configuration illustrated in <FIG>, at least two of the first routing lines <NUM> are formed in the region corresponding to a respective one of the touch electrodes <NUM> so as to overlap the shield electrode <NUM>. Thus, the second routing lines <NUM> are disposed not only between two adjacent ones of the touch electrodes <NUM> but also between the at least two first routing lines <NUM> in the region corresponding to a respective one of the touch electrodes <NUM>. In other words, a second routing line <NUM> is disposed between two different first routing lines <NUM> on the same touch electrode <NUM>. In this case, at least four routing contact holes <NUM> are disposed in the regions in which each routing line <NUM> corresponds to a respective one of the touch electrodes <NUM>. As such, since the number of routing contact holes <NUM> used for the connection of the first and second routing lines <NUM> and <NUM> in the configuration illustrated in <FIG> is greater than the number of routing contact holes <NUM> in the configuration illustrated in <FIG>, it is possible to prevent defective contact between the first and second routing lines <NUM> and <NUM>. As the skilled person would understand, the greater the number of routing contact holes <NUM>, the greater the contact area. As such, the electrical contact between the first and second routing lines <NUM> and <NUM> has increased stability due to the increased number of routing contact holes <NUM>.

The shield electrode <NUM> is disposed on the second inorganic encapsulation layer <NUM>, which is formed between the touch electrodes <NUM> and the cathode <NUM> of the light-emitting element <NUM>. Here, the shield electrode <NUM> is formed on the entire surface of the active area so as to overlap the touch electrodes <NUM>, with the touch insulation film <NUM> interposed therebetween.

The shield electrode <NUM> is formed in a single-layer or multi-layer structure using a transparent conductive film formed of ITO, IZO, IGZO, or ZnO or using an opaque conductive film formed of metal having high corrosion resistance and acid resistance and excellent conductivity, such as, for example, Ta, Ti, Cu, or Mo, or is formed in a multi-layer structure in which the transparent conductive film 151a and the opaque conductive film 151b are stacked in that order or in the reverse order. When the shield electrode <NUM> includes the opaque conductive film, the shield electrode <NUM> is formed in a mesh shape that does not overlap the emission area but overlaps the bank <NUM>, thereby preventing an aperture ratio and transmissivity from being lowered by the shield electrode <NUM>.

During a touch-sensing period, a load free driving signal LFD, which is an alternating-current signal of a voltage having at least one of an amplitude or phase the same as that of the touch-driving signal, is supplied to the shield electrode <NUM>. Thus, because there is no difference in voltage between the shield electrode <NUM> and the touch electrodes <NUM>, it is possible to minimize parasitic capacitance between the shield electrode <NUM> and the touch electrodes <NUM>. In addition, the shield electrode <NUM> may also block noise generated by the electrodes and the signal lines of the display panel.

As illustrated in <FIG> and <FIG>, a touch pad <NUM> and a shield pad <NUM> are disposed in the pad area of the substrate <NUM> that is exposed by, and not covered by, the encapsulation unit <NUM>. The pad area, in which the touch pad <NUM> and the shield pad <NUM> are disposed, may be bent and disposed on the rear surface of the active area AA. Thus, the area occupied by the active area is maximized and the area corresponding to the pad area is minimized on the entire screen of the display device.

The touch pad <NUM> and the shield pad <NUM> are disposed in the same plane as a display pad (not illustrated), which is connected to at least one of a scan line or a data line of the pixel-driving circuit. For example, each of the touch pad <NUM>, the shield pad <NUM> and the display pad is disposed on at least one display insulation film of the buffer layer <NUM>, the interlayer insulation film <NUM>, or the planarization film <NUM>, which is disposed between the substrate <NUM> and the encapsulation unit <NUM>, or on the touch insulation film <NUM>.

The touch pad <NUM>, the shield pad <NUM> and the display pad are formed so as to be exposed by, and not covered by, a touch protective film <NUM>, and are thus connected to a signal transmission film, on which a touch-driving circuit (not illustrated) is installed. The touch protective film <NUM> is formed to cover the touch electrodes <NUM>, thus preventing the touch electrodes <NUM> from corroding due to external moisture or the like. The touch protective film <NUM> is formed in a film or thin-film configuration using an organic insulation material such as epoxy or acryl or using an inorganic insulation material such as SiNx or SiOx.

The touch pad <NUM> supplies a touch-driving signal to the touch electrodes <NUM> via the routing lines <NUM>. In addition, the touch pad <NUM> receives a touch-driving signal, sensed by the touch electrodes <NUM>, via the routing lines <NUM>, and supplies the touch-driving signal to the touch-driving circuit (not illustrated), which is connected with the touch pad <NUM>. The touch-driving circuit determines the presence or absence of a user touch and a touch position by sensing variation in capacitance, which is changed due to a user touch.

Like the touch pad <NUM>, the shield pad <NUM> is formed in a single-layer or multi-layer structure using metal having high corrosion resistance and acid resistance and excellent conductivity, such as, for example, Ta, Ti, Cu, or Mo. For example, the touch pad <NUM> is formed in a multi-layer structure, such as Ti/Al/Ti or Mo/Al/Mo, in which metal having high corrosion resistance and acid resistance is disposed at the uppermost layer.

The shield pad <NUM> is connected to the shield electrode <NUM> via a shield line <NUM>, which is formed along the side surface of the encapsulation unit <NUM> as shown in <FIG>. Thus, during a touch-sensing period, the shield pad <NUM> supplies a load free driving signal LFD, at least one of the amplitude or the phase of which is the same as that of the touch-driving signal, to the shield line <NUM>. Thus, there is no difference in voltage between the shield electrode <NUM> and the touch electrodes <NUM> during a touch-sensing period, and thus it is possible to minimize parasitic capacitance between the shield electrode <NUM> and the touch electrodes <NUM>, thereby blocking noise that may be generated during a touch-sensing period.

<FIG> is a waveform diagram illustrating the signal waveform to be supplied to the touch electrodes and the shield electrode in the display device having a touch sensor according to the present invention.

Referring to <FIG>, one frame period 1F is time-divided into a display period DP and a touch-sensing period TP. One touch-sensing period TP is allocated between the display periods DP.

During the display period DP, a pixel-driving signal (e.g. a scan signal, a data signal, a low-voltage driving signal, and a high-voltage driving signal) is supplied to each subpixel. Here, the scan signal is the voltage of a gate pulse to be supplied to each scan line. The data signal is the data voltage of an input image to be supplied to each data line during the display period. The low-voltage driving signal is the voltage to be supplied to the cathode of each light-emitting element <NUM> during the display period DP. The high-voltage driving signal is the voltage to be supplied to the drain electrode of each driving transistor during the display period DP. During the display period DP, the touch electrodes TE or <NUM> may be switched to a floating state in which no signal is applied thereto or to a state in which a specific voltage (e.g. ground voltage) is applied thereto.

During the touch-sensing period TP, in response to a touch control signal Tsync from a timing controller, the touch-driving circuit supplies a touch-driving signal TDS to the touch electrodes TE or <NUM>, and supplies a load free driving signal LFD, which has the same phase and amplitude as the touch-driving signal TDS to be supplied to the touch electrodes TE or <NUM>, to the shield electrode SE or <NUM>. Thus, it is possible to minimize parasitic capacitance between the touch electrodes TE or <NUM> and the subpixels, thereby removing touch noise and consequently increasing touch-sensing accuracy.

Although the light-emitting element <NUM> and the pixel-driving circuit are not illustrated in <FIG>, a plurality of light-emitting elements <NUM> and pixel-driving circuits may be disposed under the encapsulation unit <NUM>, as illustrated in <FIG>.

As is apparent from the above description, according to the present invention, a shield electrode is disposed between a light-emitting element and touch electrodes. While a touch-driving signal is applied to the touch electrodes, a load free driving signal of which at least one of the phase or the amplitude is the same as that of the touch-driving signal is supplied to the shield electrode. As a result, it is possible to remove touch noise and consequently to secure improved touch-sensing performance.

Claim 1:
A display device having a touch sensor, comprising:
a light-emitting element (<NUM>) disposed on a substrate (<NUM>);
an encapsulation unit (<NUM>) disposed on the light-emitting element (<NUM>);
a plurality of touch electrodes (<NUM>) disposed on the encapsulation unit (<NUM>);
a shield electrode (<NUM>) disposed between the light-emitting element (<NUM>) and the plurality of touch electrodes (<NUM>); and
a plurality of routing lines (<NUM>), each of the routing lines (<NUM>) being electrically connected to the touch electrodes (<NUM>), the routing lines (<NUM>) being disposed along a side surface of the encapsulation unit (<NUM>) in a non-active area of the display device,
wherein, the display device is configured such that while a touch-driving signal (TDS) is applied to the plurality of touch electrodes (<NUM>), a load free driving signal (LFD) is supplied to the shield electrode (<NUM>), wherein at least one of a phase or an amplitude of the load free driving signal (LFD) is substantially the same as a phase or an amplitude of the touch-driving signal (TDS),
wherein each of the routing lines (<NUM>) comprises:
first routing lines (<NUM>) spaced apart from each other in a longitudinal direction of the routing lines; and
second routing lines (<NUM>) disposed between the first routing lines (<NUM>), the second routing lines (<NUM>) electrically connecting the first routing lines (<NUM>) to each other,
wherein the first routing lines (<NUM>) and the touch electrodes (<NUM>) are situated in a same layer and separated by a first hole structure (<NUM>), wherein the first hole structure (<NUM>) is formed around substantially all or at least some of a perimeter of a first routing line of the first routing lines (<NUM>), and
wherein the first routing lines (<NUM>) are disposed within the touch electrodes (<NUM>).