KR20250008994A - Display device having touch screen - Google Patents

Abstract

The present invention relates to a display device having a touch screen. A display device having a touch screen according to an embodiment of the present invention includes: a display module; a touch layer disposed on an upper side of the display module; an elastic member disposed on an upper side of the touch layer; and a transparent film or flexible substrate disposed on an upper side of the elastic member, wherein touch sensors and sensor signal lines may be formed in a mesh pattern on the touch layer. In addition, the present invention includes embodiments other than the above-described embodiments.

Description

{Display device having touch screen}

The present invention relates to a display device having a touch screen.

In general, touch screens are used in various industrial fields such as mobile devices such as mobile phones, PDAs (Personal Digital Assistants), and PMPs (Portable Multimedia Players), as well as navigation, netbooks, notebooks, DIDs (Digital Information Devices), desktop computers using touch input-supported operating systems, IPTVs (Internet Protocol TVs), cutting-edge fighter aircraft, tanks, and armored vehicles.

The above touch screen can be added on top of various types of display devices such as LCD (Liquid Crystal Display), PDP (Plasma Display Panel), and OLED (Organic Light Emitting Diode), or can be built into the display device.

The above OLED is a self-luminous display element in which electrons and holes injected into an organic material thin film through an anode and a cathode recombine to form excitons, and light of a specific wavelength is emitted by the energy of the excitons. The above OLED can be classified into AMOLED (Active Matrix Organic Light-Emitting Diode) and PMOLED (Passive Matrix Organic Light-Emitting Diode).

The display device using the above touch screen can be classified into a touch screen add-on type display device, a touch screen on-cell type display device, and a touch screen built-in (in-cell type) display device.

The above touch screen-attached display device has the disadvantages of being thick and having low brightness of the display device, which reduces visibility, since the display device and the touch screen are manufactured separately and then the touch screen is attached to the top of the display device.

The above touch screen top-plate type display device can be made thinner than the touch screen-attached display device by directly forming elements constituting the touch screen on the upper substrate of the display device, for example, the surface of the color filter of an LCD or the surface of the sealing substrate of an OLED. However, there is still a limit to reducing the thickness.

An embodiment of the present invention aims to provide a display device having a touch screen capable of improving user convenience by performing any specific operation corresponding to a pressure touch when a pressure touch is detected in a specific area corresponding to, for example, an outer portion of the touch screen.

An embodiment of the present invention provides a display device having a touch screen, which can efficiently reduce the thickness of the device by forming a touch sensor and a sensor signal line in a mesh pattern in a part of a common electrode that applies a common voltage to an organic light-emitting body in an organic light-emitting display device, for example.

An embodiment of the present invention provides a display device having a touch screen, which can efficiently reduce the thickness of the device by forming a touch sensor and a sensor signal line in a mesh pattern on the upper or lower side of a portion of a common electrode that applies a common voltage to an organic light-emitting body in an organic light-emitting display device, for example.

A display device having a touch screen according to an embodiment of the present invention comprises: a display module; a touch layer disposed on an upper side of the display module; an elastic member disposed on an upper side of the touch layer; and a transparent film or flexible substrate disposed on an upper side of the elastic member, wherein touch sensors and sensor signal lines may be formed in a mesh pattern on the touch layer.

The above mesh pattern may be formed in an area corresponding to a boundary area between the plurality of pixels. The display module may be any one of an LCD (Liquid Crystal Display), an AMOLED (Active Matrix Organic Light-Emitting Diode), or a PMOLED (Passive Matrix Organic Light-Emitting Diode).

The above mesh pattern may be a transparent conductive material or an opaque metal material. The touch sensors are arranged in a dot matrix structure and may have areas of different sizes depending on the distance between the touch sensors and the touch driver IC.

A plurality of sensor signal lines may be connected to the above touch sensor. The touch sensors and the sensor signal lines may be positioned on the same line vertically with a driving signal line that drives the pixel. The touch input detection unit for detecting a multi-point touch may further be included, wherein the touch input detection unit may detect a first touch caused by an approach or contact of a touch input means and a second touch caused by a press of the touch input means by distinguishing between the first touch and the second touch.

The second touch can be detected by a change in touch capacitance between the touch input means and the touch sensor. The touch input detection unit can be any one of a touch drive IC (TDI), a display drive IC (LDI), or a touch display drive IC in which the touch drive IC and the display drive IC are integrated.

A display device having a touch screen according to an embodiment of the present invention comprises: a display module; an elastic member disposed on an upper side of the display module; a touch layer disposed on an upper side of the elastic member; and a transparent film or flexible substrate disposed on an upper side of the touch layer, wherein touch sensors and sensor signal lines may be formed in a mesh pattern on the touch layer.

The above mesh pattern may be formed in an area corresponding to a boundary area between the plurality of pixels. The display module may be any one of an LCD (Liquid Crystal Display), an AMOLED (Active Matrix Organic Light-Emitting Diode), or a PMOLED (Passive Matrix Organic Light-Emitting Diode).

The above mesh pattern may be a transparent conductive material or an opaque metal material. The touch sensors are arranged in a dot matrix structure and may have areas of different sizes depending on the distance between the touch sensors and the touch driver IC.

A plurality of sensor signal lines may be connected to the above touch sensor. The touch sensors and the sensor signal lines may be positioned on the same line vertically with a driving signal line that drives the pixel. The touch input detection unit for detecting a multi-point touch may further be included, wherein the touch input detection unit may detect a first touch caused by an approach or contact of a touch input means and a second touch caused by a press of the touch input means by distinguishing between the first touch and the second touch.

The second touch can be detected by a change in common voltage capacitance between the touch input means and the touch sensor. The touch input detection unit can be any one of a touch drive IC (TDI), a display drive IC (LDI), or a touch display drive IC in which the touch drive IC and the display drive IC are integrated.

According to an embodiment of the present invention, a user can quickly and easily perform any specific operation, such as volume control, power control, or reset operation, by touching a specific area corresponding to the outer portion of a touch screen with pressure.

According to an embodiment of the present invention, the thickness of a display device having a touch screen can be efficiently reduced, and the manufacturing process can be further simplified, thereby contributing to a reduction in product price and an improvement in productivity.

According to an embodiment of the present invention, in a display device having a touch screen, it is possible to prevent a touch sensor and a sensor signal line from being observed, and eliminate or reduce the influence of the touch sensor and the sensor signal line on the display device.

According to an embodiment of the present invention, it is possible to prevent recognition errors of touch signals, reduce stray capacitance occurring between a touch sensor and a sensor signal line and components of a display device, or reduce resistance of a sensor signal line.

Figure 1 is a drawing showing the structure of an organic light-emitting diode to which an embodiment of the present invention is applied.
Figure 2 is an equivalent circuit diagram for a pixel of an organic light-emitting display device to which an embodiment of the present invention is applied.
Figure 3 is a layout diagram of pixels of an organic light-emitting display device to which an embodiment of the present invention is applied.
Fig. 4 is an enlarged cross-sectional view of portion AA' of Fig. 3.
FIG. 5 is a cross-sectional view showing a touch sensor and a sensor signal line formed in a portion of a common electrode according to a first embodiment of the present invention.
FIG. 6 is a cross-sectional view showing a touch sensor and a sensor signal line formed on the upper side of a portion of a common electrode according to a second embodiment of the present invention.
FIG. 7 is a cross-sectional view showing a touch sensor and a sensor signal line formed on the lower side of a portion of a common electrode according to a third embodiment of the present invention.
FIG. 8 is an exemplary drawing in which a touch sensor and a sensor signal line are formed in a mesh pattern in a boundary area between pixels according to an embodiment of the present invention.
FIG. 9 is an exemplary drawing showing a touch sensor connected to a touch detection unit via a sensor signal line according to an embodiment of the present invention.
FIG. 10 is an exemplary diagram showing a touch sensor operating alternately as a sensing pad and a non-sensing pad according to an embodiment of the present invention.
FIGS. 11 and 12 are exemplary drawings showing a touch layer and an elastic member installed to detect a pressure touch according to an embodiment of the present invention.
FIG. 13 is an exemplary diagram for detecting a pressure touch of a touch capacitance (Ct) according to an embodiment of the present invention.
FIG. 14 is an exemplary drawing showing a touch layer for detecting a pressure touch, an elastic member, and a common electrode installed according to an embodiment of the present invention.
FIG. 15 is an exemplary diagram for detecting a pressure touch of a common voltage capacitance (Cvcom) according to an embodiment of the present invention.
FIG. 16 is a drawing illustrating a touch detection circuit diagram according to an embodiment of the present invention.
FIG. 17 is a cross-sectional view illustrating a basic configuration for detecting touch capacitance and common voltage capacitance according to an embodiment of the present invention.
FIG. 18 is a cross-sectional view of a touch sensor and a sensor signal line formed in a pixel electrode layer according to an embodiment of the present invention.
FIG. 19 is a cross-sectional view of a touch sensor and a sensor signal line formed in a TFT layer according to an embodiment of the present invention.
FIG. 20 is an exemplary diagram for detecting a pressure touch of a touch capacitance (Ct) through a through hole according to an embodiment of the present invention.
FIG. 21 is an exemplary drawing of a touch screen divided into a first area and a second area according to an embodiment of the present invention.
Figure 22 is a circuit diagram of a portable terminal to which an embodiment of the present invention is applied.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings and examples.

The present invention relates to a display device having a touch screen, and the display device to which an embodiment of the present invention is applied may be a display device such as an LCD, or various types of OLED display devices such as AMOLED or PMOLED, or various types of display devices that display still images (e.g., JPG, TIF, etc.) or moving images (MPEG-2, MPEG-4, etc.) in any form.

The touch detection method of the embodiment of the present invention can detect a touch by comparing the magnitude between the voltage detected when a touch does not occur and the voltage detected when touch electrostatic capacitance is added due to a touch occurrence, and can detect a touch by the difference in magnitude between the two voltages. Furthermore, by minimizing the influence of stray capacitance, etc. due to a guard layer (G/L), a touch signal can be acquired more stably.

The touch input means of the embodiment of the present invention may include, for example, a keyboard, a mouse, a finger, a touch pen, a stylus pen, and the like, as well as various forms of input that cause voltage change so that they can be detected by a touch sensor, for example, an object such as a conductor having a certain shape, or an input means such as electromagnetic waves.

The touch sensor of the embodiment of the present invention may be referred to as, for example, a sensing pad and a non-sensing pad. The sensing pad is a touch sensor among a plurality of touch sensors that is connected to a touch detection unit so as to detect a touch, and the non-sensing pad means a touch sensor among a plurality of touch sensors that is not connected to the touch detection unit so as not to detect a touch. The sensing pad and the non-sensing pad may be switched with each other in a predetermined order, for example, in a sequential manner according to a predetermined order, or in a time sharing manner.

Among the terms and expressions mentioned in the embodiments of the present invention, on the same line can be used to mean opposite (overlap) at the same upper and lower positions, and a metal material or an insulator, etc. that forms a signal line, etc. may exist between the on the same line. For example, when A and B are on the same line, it means that A is on the upper surface of B or B is on the upper surface of A, and another material such as an insulator or metal may exist between A and B. In addition, when A and B are on the same line, the width of A and the width of B are not limited unless otherwise specified, and the mutual ratio of the widths of A and B is not specified unless otherwise specified.

Among the terms and expressions mentioned in the embodiments of the present invention, components such as a ~ unit are a collection of unit function elements that perform a specific function. For example, an amplifier of a certain signal is a unit function element, and a collection of amplifiers or signal converters may be named a signal conversion unit, etc. In addition, the ~ unit may be included in a larger component or the ~ unit, or may include smaller components and ~ units. In addition, the ~ unit may include an independent CPU (Central Processing Unit) that can process instructions stored in a memory, etc. or an operation function on its own.

In the drawings of the embodiments of the present invention, the thickness or region is enlarged to clearly express various layers and regions, and the same drawing reference numerals are used for similar parts. When a part such as a layer, region, or substrate is said to be on or on another part, this may include not only the case where it is directly on the other part (without another part in between), but also the case where there is another part in between (e.g., an intermediary layer or an insulating layer).

In the embodiments of the present invention, a signal may refer to voltage or current in general, unless otherwise specified, and capacitance may indicate a physical size and may be used with the same meaning as electrostatic capacity. A capacitor may refer to an element having a physical size or capacitance. In the embodiments of the present invention, a compensation capacitor (Cbal) may be generated by a design and manufacturing process within a touch detection unit, for example, a touch drive IC (Integrated Circuit), or may be generated naturally between two adjacent sensor signal lines. In the embodiments of the present invention, both directly generated capacitors and naturally generated capacitors may be referred to as capacitors without distinction.

In an embodiment of the present invention, the symbol C used as a symbol of a capacitor is used as a symbol referring to a capacitor, and can represent capacitance, which is the size of the capacitor. For example, C1 is also a symbol referring to a capacitor, and can mean that the capacitance, which is the size of the capacitor, is C1.

In an embodiment of the present invention, the expression of forcing a signal may mean that the level of a signal that was maintaining a certain state is changed. For example, the expression of forcing a signal to an on/off control terminal of a switching element may mean that a low level voltage (e.g., zero volts or a DC voltage or AC voltage of a certain size) is changed to a high level (e.g., a DC voltage or AC voltage having a larger amplitude value than the low level voltage).

In an embodiment of the present invention, the expressions of detecting a touch or a touch signal may have the same meaning, and a representative example of detecting a touch signal may mean detecting a difference between a first voltage detected by a touch detection unit when a conductive body such as a finger does not contact or approach the touch sensor and thus touch capacitance is not formed, and a second voltage detected by the touch detection unit by touch capacitance (Ct) formed when a conductive body such as a finger contacts or approaches the touch sensor.

In an embodiment of the present invention, the touch detection unit may be referred to as, for example, a Touch Drive IC, and the Touch Drive IC may be abbreviated as Touch IC or TDI. In an embodiment of the present invention, precharge and charge and precharge voltage and charge voltage may be used with the same meaning, and unless otherwise specified, a sensing pad may mean both a sensing pad and a sensor signal line connected to the sensing pad, and a non-sensing pad may mean both a non-sensing pad and a sensor signal line connected to the non-sensing pad.

In an embodiment of the present invention, a source signal line and a gate signal line may be referred to as a driving signal line, and the driving signal line may collectively refer to the gate signal line and the source signal line, or may refer to only one of the source signal line and the gate signal line. In addition, in an embodiment of the present invention, a sub pixel may also be referred to as a pixel or a pixel.

In the embodiment of the present invention, since the touch sensor and the sensor signal line are arranged inside the OLED display device, a detailed examination of the structure of the OLED display device is required. Hereinafter, various embodiments of the present invention will be described in detail based on AMOLED. However, since various types of display devices such as PMOLED include the concepts of pixels, signal lines, and common electrodes, the technical idea of the present invention that embeds a touch screen based on pixels, signal lines, and common electrodes can be applied.

FIG. 1 is a drawing showing the structure of an organic light-emitting diode to which an embodiment of the present invention is applied. Referring to FIG. 1, for example, an AMOLED (100) has a sandwich structure in which an organic thin film layer (120) is surrounded by an anode (130) and a cathode (110). The organic thin film layer (120) is composed of an electron injection layer (EIL) (121), an electron transport layer (ETL) (122), an emission material layer (EML) (123), a hole transport layer (HTL) (124), and a hole injection layer (HIL) (125).

Since the above-described light-emitting layer (123) must emit light to the outside, a transparent electrode having light transmittance, such as ITO (Indium Tin Oxide), may be used. When a direct current voltage is applied to the anode (130) and the cathode (110), holes (+) generated at the boundary between the anode (130), the cathode (110), and the organic thin film layer (120) move from the anode (130) toward the hole transport layer (HTL) (124), and electrons (-) move to the anode (130) through the electron transport layer (ETL) (122).

The holes and electrons that have moved as described above combine with each other in the light-emitting layer (EML) (123), and through the combination, the electron energy changes from a stable ground state to an unstable excited state with high energy, and then back to a stable ground state. At this time, when the excited state changes to the ground state, the energy corresponding to the difference between the two energies is emitted as light, which is the basic principle of AMOLED light emission.

Fig. 2 is an equivalent circuit diagram for a pixel of an organic light-emitting display device to which an embodiment of the present invention is applied. Referring to Fig. 2, for example, a pixel (PX) of an AMOLED (200) may be connected to a plurality of signal lines (210, 220, 230) and arranged in an almost matrix form.

The above-described plurality of signal lines (210, 220, 230) can be divided into a plurality of scan lines (210) that transmit scan signals or gate signals, a plurality of data lines (220) that transmit data signals, and a plurality of driving voltage lines (230) that transmit driving voltages (ELVDD). The scan lines (210) extend substantially parallel to each other in the row direction, and the data lines (220) and the driving voltage lines (230) extend substantially parallel to each other in the column direction.

The above pixel (PX) may include a switching thin film transistor (T1), a driving thin film transistor (T2), a storage capacitor (Cst), and an organic light emitting diode (OLED).

The above switching thin film transistor (T1) has a control terminal, an input terminal, and an output terminal, and the control terminal can be connected to a scan line (210), the input terminal can be connected to a data line (220), and the output terminal can be connected to a driving thin film transistor (T2). The switching thin film transistor (T1) transmits a data signal applied to the data line (220) to the driving thin film transistor (T2) in response to a scan signal applied to the scan line (210).

The above driving thin film transistor (T2) has a control terminal, an input terminal, and an output terminal, and the control terminal is connected to the switching thin film transistor (T1), the input terminal is connected to the driving voltage line (230), and the output terminal can be connected to the organic light emitting diode (OLED). The driving thin film transistor (T2) transmits an output current (Id), the size of which varies depending on the voltage applied between the control terminal and the output terminal, to the organic light emitting diode (OLED).

The above storage capacitor (Cst) is connected between the control terminal and the input terminal of the driving thin film transistor (T2), and can charge a data signal applied to the control terminal of the driving thin film transistor (T2) and maintain it even after the switching thin film transistor (T1) is turned off.

The above organic light emitting diode (OLED) includes an anode connected to the output terminal of the driving thin film transistor (T2) and a cathode connected to a common voltage (ELVSS), and displays an image by emitting light with different intensity depending on the output current (Id) of the driving thin film transistor (T2).

The above switching thin film transistor (T1) and the driving thin film transistor (T2) may be an n-channel field effect transistor (FET) or a p-channel field effect transistor. Here, the connection relationship among the switching thin film transistor (T1), the driving thin film transistor (T2), the storage capacitor (Cst), and the organic light emitting diode (OLED) may be changed.

FIG. 3 is a layout diagram of pixels of an organic light-emitting display device to which an embodiment of the present invention is applied. Referring to FIG. 3, for example, pixels of an AMOLED are organic light-emitting diodes that independently emit various colors such as R, G, and B, and can be arranged in an almost matrix form.

The above organic light-emitting diode may include a pixel electrode, an organic light-emitting layer, and a common electrode. A pixel electrode (300) for applying a driving voltage (ELVDD) may be formed on a lower side of the organic light-emitting layer, and a common electrode for applying a common voltage (ELVSS) may be formed on an upper side of the organic light-emitting layer. Here, the pixel electrode may correspond to an anode of the organic light-emitting diode, and the common electrode may correspond to a cathode of the organic light-emitting diode.

The pixel electrode (300) and the common electrode may be, for example, a transparent conductive material such as ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), ZnO, or In2O3 (Indium Oxide), or a non-transparent metal material such as lithium (Li), calcium (Ca), lithium fluoride/calcium (LiF/Ca), lithium fluoride/aluminum (LiF/Al), aluminum (Al), silver (Ag), magnesium (Mg), or gold (Au).

FIG. 4 is a cross-sectional view of an organic light-emitting display device to which an embodiment of the present invention is applied, for example, an enlarged cross-sectional view of section A-A' of FIG. 3. Referring to FIG. 4, an organic light-emitting display device (400) includes a light-emitting display substrate (400) and a sealing substrate (425), and the light-emitting display substrate (400) has a structure in which a lower substrate (411), a buffer layer (412), a gate insulating film (413), an interlayer insulating film (414), a protective film (415), and a pixel defining film (416) are laminated.

The above-described light-emitting display substrate (410) includes an organic light-emitting diode (424), a driving thin film transistor (T2), a switching thin film transistor (not shown), etc., and the organic light-emitting diode (424) includes a pixel electrode (4240), an organic light-emitting layer (4241), and a common electrode (4242). The driving thin film transistor (T2) includes a driving source electrode (419), a driving semiconductor layer (420), a driving gate layer (421), and a driving drain electrode (422), and the driving semiconductor layer (420) can be divided into a source region (4210), a channel region (4211), and a drain region (4212).

The above-described light-emitting display substrate (410) includes a common voltage line (417), a connection line (418), and a contact hole (423). The common voltage line (417) is formed along a peripheral area surrounding a pixel area, the connection line (418) is formed in the peripheral area and is in direct contact with the common voltage line, and the contact hole (423) is formed in the peripheral area and brings the connection line (418) into contact with the common electrode (4242).

The lower substrate (411) may be an insulating substrate made of glass, quartz, ceramic, or plastic. The buffer layer (412) may be formed as a single film of silicon nitride (SiNx) or a double film structure in which silicon nitride (SiNx) and silicon oxide (SiO2) are laminated, and the buffer layer (412) serves to prevent the penetration of unnecessary components such as impurities or moisture while at the same time flattening the surface.

The above driving semiconductor layer (420) may be made of polysilicon or an oxide semiconductor. For example, when made of an oxide semiconductor, a separate protective layer may be added to protect the oxide semiconductor, which is vulnerable to external environments such as high temperatures.

The above gate insulating film (413) is formed on the driving semiconductor layer (420) and may be a single layer or multiple layers including at least one of silicon nitride and silicon oxide, and a scan line, a driving gate electrode, and a storage capacitor, etc. may be formed on the gate insulating film (413).

The interlayer insulating film (414) is formed on top of the scan line, the driving gate electrode, and the storage capacitor, and, like the gate insulating film, may be formed of silicon nitride or silicon oxide. The protective film (415) is formed on the upper side of the interlayer insulating film, and a pixel electrode (4240) and a connecting line (418), etc., are formed on the upper side of the protective film (415).

The pixel definition film (416) is formed at the edge of the protective film (415) and the pixel electrode (4240), and has an opening (not shown) exposing the pixel electrode (4240) and a contact hole (423) that contacts the connection line (418) and the common electrode. The pixel definition film (416) can be formed of a resin such as polyacrylates or polyimides, and an inorganic material of the silica series.

Meanwhile, as illustrated in Fig. 4, there is a region called a black matrix (BM) in the boundary region between the organic light-emitting layers (4241). Here, the black matrix region may be called a BM region or any other name.

Various embodiments of the present invention provide a display device having a touch screen capable of efficiently reducing the thickness of the device by forming a touch sensor and a sensor signal line in a mesh pattern on a portion of a common electrode (4242) corresponding to the BM region, or by forming a touch sensor and a sensor signal line in a mesh pattern on the upper or lower portion of a portion of the common electrode (4242) corresponding to the BM region. This will be described in detail below.

FIG. 5 is a cross-sectional view showing a touch sensor and a sensor signal line formed in a portion of a common electrode according to a first embodiment of the present invention.

Referring to FIG. 5, a display device (500) equipped with a touch screen according to the first embodiment of the present invention has a structure identical to or substantially similar to that described above with reference to FIG. 4, but a touch sensor and a sensor signal line may be formed in a mesh pattern in a portion of a common electrode (5242) that applies a common voltage to an organic light-emitting layer (or organic light-emitting body) (5241).

For example, as illustrated in FIG. 5, in some areas of the common electrode (5242) corresponding to the BM area, a touch sensor and a sensor signal line for touch detection are formed using a mesh pattern (530, 531, 532) of a transparent conductive material or a non-transparent metal material, so that the thickness of the display device can be efficiently reduced.

FIG. 6 is a cross-sectional view showing a touch sensor and a sensor signal line formed on the upper side of a portion of a common electrode according to a second embodiment of the present invention.

Referring to FIG. 6, a display device (600) equipped with a touch screen according to a second embodiment of the present invention has a structure identical to or almost similar to that described above with reference to FIG. 4, but a touch sensor and a sensor signal line may be formed in a mesh pattern on the upper side of a part of a common electrode (6242) that applies a common voltage to an organic light-emitting layer (or organic light-emitting body) (6241).

For example, as illustrated in FIG. 6, on the upper side of a portion of a common electrode (6242) corresponding to the BM region, a touch sensor and a sensor signal line for touch detection are formed using a mesh pattern (630, 631, 632) of a transparent conductive material or a non-transparent metal material, so that the thickness of the display device can be efficiently reduced.

FIG. 7 is a cross-sectional view showing a touch sensor and a sensor signal line formed on the lower side of a portion of a common electrode according to a third embodiment of the present invention.

Referring to FIG. 7, a display device (700) equipped with a touch screen according to a third embodiment of the present invention has a structure identical to or almost similar to that described above with reference to FIG. 4, but a touch sensor and a sensor signal line may be formed in a mesh pattern on the lower side of a part of a common electrode (7242) that applies a common voltage to an organic light-emitting layer (or organic light-emitting body) (7241).

For example, as illustrated in FIG. 7, a touch sensor and a sensor signal line for touch detection are formed on the lower side of a part of a common electrode (7242) corresponding to the BM region using a mesh pattern (730, 731, 732) of a transparent conductive material or a non-transparent metal material, thereby efficiently reducing the thickness of the display device. Here, a through hole (730h, 731h, 732h) for securing the sensitivity of touch detection may be formed in a part of the common electrode corresponding to the part where the mesh pattern (730, 731, 732) is formed.

FIG. 8 is an exemplary drawing in which a touch sensor and a sensor signal line are formed in a mesh pattern in a boundary area between pixels according to an embodiment of the present invention.

As described above with reference to FIGS. 5 to 7, the touch sensor and the sensor signal line of the mesh pattern may be formed in a part of the common electrode corresponding to the BM region, which is a boundary region between pixels (e.g., organic light-emitting layers), or may be formed on the upper or lower side of a part of the common electrode corresponding to the BM region.

Referring to FIG. 8, mesh patterns corresponding to a plurality of pixels can be grouped and set as one touch sensor (800), and one sensor signal line (810) can be connected to one touch sensor (800).

In the above one touch sensor (800), two or more sensor signal lines can be connected, and this is implemented so that even if any one sensor signal line is disconnected, normal touch detection is possible by the other sensor signal lines.

The above one touch sensor (800) can be set to a mesh pattern corresponding to, for example, one pixel or a small number of pixels (e.g., two), and this is for implementing a touch sensor that requires high resolution for fingerprint recognition, etc.

Here, the number of pixels corresponding to the touch sensor and the number of sensor signal lines connected to the touch sensor are not limited by the embodiment of the present invention.

FIG. 9 is an exemplary drawing showing a touch sensor connected to a touch detection unit via a sensor signal line according to an embodiment of the present invention.

Referring to FIG. 9, for example, a touch sensor (900) may be set as one by grouping mesh patterns corresponding to a plurality of pixels, and one sensor signal line may be connected to the touch sensor (900) and connected to a touch detection unit (920). Furthermore, as illustrated in FIG. 9, a plurality (e.g., two) sensor signal lines (910) may be connected to at least one touch sensor and connected to a touch detection unit (920).

The above touch detection unit (920) may be referred to in various ways, for example, as a touch drive IC or TDI. The above touch detection unit (920) is a circuit element that drives the touch sensor, receives a touch signal through the sensor signal line, and detects the location or area of a touch input.

The above touch detection unit (920) may be installed separately from a display drive IC that drives an organic light emitting display device, for example, and may be designed to be linked with the display drive IC or combined with the display drive IC into one IC.

Here, the area of the touch sensor (900) may be set differently depending on the distance from the touch detection unit (920). For example, the area of a touch sensor that is further from the touch detection unit (920) may be set larger than the area of a touch sensor that is closer from the touch detection unit (920).

Furthermore, the width of the sensor signal line (910) may be set differently depending on the connection length with the touch detection unit (920). For example, the width of a sensor signal line having a long connection length with the touch detection unit (920) may be set larger than the width of a sensor signal line having a short connection length with the touch detection unit (920).

FIG. 10 is an exemplary diagram showing a touch sensor operating alternately as a sensing pad and a non-sensing pad according to an embodiment of the present invention.

Referring to FIG. 10, as described above with reference to FIGS. 8 and 9, a plurality of touch sensors formed in a mesh pattern may be arranged in a plurality of rows (e.g., Row1 to 6) and a plurality of columns (e.g., Col1 to 5) in a dot matrix form, for example. Some of the touch sensors may be variably set as sensing pads (1000a) that perform touch detection, and other of the touch sensors may be variably set as non-sensing pads (1000b) that do not perform touch detection.

Here, the sensing pad (1000a) and the non-sensing pad (1000b) are terms that symbolically express the current operating state of the touch sensor, and may be referred to by any other name. The sensing pad (1000a) and the non-sensing pad (1000b) may be alternated with each other according to the control of the touch detection unit (1020). For example, the touch detection unit (1020) may alternately use one touch sensor as a sensing pad and a non-sensing pad in a time-division manner.

The above touch detection unit (1020) may be, as described above, a touch drive IC (TDI) or a circuit element combined with a display drive IC, for example, a TLDI (Touch Display Drive IC).

As illustrated in FIG. 10, the above touch detection unit (1020) may include a driving unit (1021), a CPU (1022), a timing control unit (1023), an alternating voltage generation unit (1024), a communication unit (1025), a touch detection unit (1026), a signal processing unit (1027), a memory unit (1028), and a power supply unit (1029). Here, at least one of the above components (e.g., CPU, power supply, etc.) may be installed outside the touch detection unit (1020).

The above driving unit (1021) can, in conjunction with the timing control unit (1023), variably set one touch sensor to a sensing pad and a non-sensing pad, and at this time, a time division method can be used.

For example, as illustrated in FIG. 10, among a plurality of touch sensors arranged in a dot matrix form, the first to sixth touch sensors arranged in the first column (Col1) can be variably set as sensing pads ((C1, R1), (C1, R3), (C1, R5)) and non-sensing pads ((C1, R2), (C1, R4), (C1, R6)) at intervals of one touch sensor, and the first to sixth touch sensors arranged in the second column (Col2) can be variably set as sensing pads ((C2, R2), (C2, R4), (C2, R6)) and non-sensing pads ((C2, R1), (C2, R3), (C2, R5)) at intervals of one touch sensor.

And, a charging voltage or driving voltage for touch detection is applied to the sensing pad, and a DC voltage of a certain size for display driving or a ground voltage based on 0 V or ground voltage is applied to the non-sensing pad.

FIG. 11 and FIG. 12 are exemplary drawings in which a touch layer and an elastic member for detecting a pressure touch are installed according to an embodiment of the present invention. Referring to FIG. 11, a touch layer (1102) in which a touch sensor for detecting a touch and a sensor signal line are formed is disposed on the upper side of a display module (1101), an elastic member (1103) is disposed on the upper side of the touch layer (1102), and a protective film or soft glass (1104), etc., may be disposed on the upper side of the elastic member.

The above display module (1101) may be an LCD module or an OLED module, and the elastic member (1103) and the protective film or flexible glass (1104) may have elasticity that allows the corresponding portion to bend when pressure is applied by, for example, a touch input means.

Referring to FIG. 12, a touch layer (1201) in which a touch sensor for touch detection and a sensor signal line are formed is placed inside a display module (1202), and an elastic member (1203) may be placed on an upper side of the display module (1202), and a protective film or soft glass (1304), etc. may be placed on an upper side of the elastic member (1203).

The above display module (1202) may be an LCD module or an OLED module, and the elastic member (1203) and the protective film or flexible glass (1204) may have elasticity that allows the corresponding portion to bend when pressure is applied by, for example, a touch input means.

Here, as described above with reference to FIG. 11, a structure in which the touch layer is disposed on the upper side of the display module may be referred to as an on-cell structure, and as described above with reference to FIG. 12, a structure in which the touch layer is disposed inside the display module may be referred to as an in-cell structure.

FIG. 13 is an exemplary diagram for detecting a pressure touch of a touch capacitance (Ct) according to an embodiment of the present invention. Referring to FIG. 13, a touch layer (1302) in which a touch sensor for touch detection and a sensor signal line are formed is disposed on the upper side of a display module (1301), an elastic member (1303) is disposed on the upper side of the touch layer (1302), and a protective film or a soft glass (1304), etc., may be disposed on the upper side of the elastic member.

The above display module (1301) may be an LCD module or an OLED module, and the elastic member (1303) and the protective film or flexible glass (1304) may have an elastic force that allows the corresponding portion to bend when a user touches it with a finger and applies pressure, as shown in FIG. 13, for example.

At this time, the distance between the user's finger and the touch layer becomes narrow, so the touch capacitance used for touch detection changes from Ct to Ct'. Here, the method of detecting the touch capacitance (Ct) will be described in detail later.

The change in touch capacitance as described above becomes a value corresponding to the pressure applied by the user's finger. That is, the first touch caused by the approach or contact of a touch input means such as the user's finger, and the second touch caused by the pressure applied by the touch input means can be distinguished and recognized.

As described above, the above-described embodiment with reference to FIG. 13 can be applied not only to the on-cell structure in which the touch layer is disposed on the upper side of the display module, as in FIG. 11, but can also be applied to the in-cell structure in which the touch layer is disposed inside the display module, as in FIG. 12.

FIG. 14 is an exemplary drawing showing a touch layer for detecting a pressure touch, an elastic member, and a common electrode installed according to an embodiment of the present invention.

Referring to FIG. 14, a touch layer (1404) having a touch sensor for touch detection and a sensor signal line formed thereon may be placed between a protective film or flexible glass (1405) and an elastic member (1404), and a display module (1401) may be placed on the lower side of the elastic member (1404).

The above display module (1401) may be an LCD module or an OLED module, and the elastic member (1403) and the protective film or flexible glass (1405) may have elasticity that allows the corresponding portion to bend when pressure is applied by, for example, a touch input means. A common electrode (1402) may be included inside the display module (1401).

For reference, the touch layers (1102, 1201) of FIGS. 11 and 12 are arranged on the lower side of the elastic member (1103, 1203), while the touch layer (1404) of FIG. 4 is arranged on the upper side of the elastic member (1403).

FIG. 15 is an exemplary diagram for detecting a pressure touch of a common voltage capacitance (Cvcom) according to an embodiment of the present invention. Referring to FIG. 15, a touch layer (1504) in which a touch sensor for touch detection and a sensor signal line are formed may be arranged between an elastic member (1503) and a protective film or flexible glass (1505) having elasticity that allows the corresponding portion to bend when pressure is applied by a touch input means as described above.

For example, when a user applies a pressure touch using a finger, the distance between the touch sensor of the corresponding portion where the pressure touch is applied and the common electrode becomes narrow, so the common voltage capacitance used for touch detection changes from Cvcom to Cvcom'. Here, a method of detecting the common voltage capacitance (Cvcom) will be described in detail later.

The change in the common voltage capacitance as described above becomes a value corresponding to the pressure applied by the user's finger. That is, the first touch caused by the approach or contact of a touch input means such as the user's finger, and the second touch caused by the pressure applied by the touch input means can be distinguished and recognized.

FIG. 16 is a diagram illustrating a touch detection circuit diagram according to an embodiment of the present invention, and FIG. 17 is a cross-sectional diagram illustrating a basic configuration for detecting touch capacitance and common voltage capacitance according to an embodiment of the present invention.

Referring to FIG. 16, the touch detection circuit (1600) may include a touch sensor (1610), a charging circuit (1612), a touch input detection unit (1614), etc., and the touch sensor (1610) is a patterned electrode for detecting a touch input. The touch sensor (1610) forms a touch capacitance (Ct) between itself and a touch input tool, such as a human finger (1625), for example.

Referring to FIG. 17, a touch sensor (1710) may be formed on the lower surface (or upper surface) of a flexible substrate (1715), such as glass or a film, for example, and may be arranged in a dot matrix form, etc.

At the lower side of the touch sensor (1710), a common electrode (1758) included inside a display module (1750) may be arranged. Here, the display module (1750) may be various types of display devices such as LCD or OLED, as described above, and a common voltage (Vcom) of a display device such as LCD or OLED may be applied to the common electrode (1758).

A common voltage level that alternates at a predetermined frequency can be applied to the common electrode (1758), and the common voltage applied to the common electrode (1758) can be maintained constant, or a separate alternating voltage can be applied to the common electrode (1758) when the common electrode (1758) is grounded with a ground signal.

Here, a common electrode capacitance (Cvcom) is formed between the touch sensor (1710) and the common electrode (1758), and when a charging signal is applied to the touch sensor (1710), the common electrode capacitance (Cvcom) has a predetermined voltage level due to the charged voltage.

At this time, since one end of the common electrode capacitance (Cvcom) is grounded with the common electrode (1758), the potential at the other end of the common electrode capacitance (Cvcom), which is the touch sensor (1710), will fluctuate due to the alternating electric field applied to the common electrode (1758). That is, the potential of the touch sensor (1710) fluctuates due to the common electrode capacitance (Cvcom).

The above-mentioned Ct and Cvcom are symbols that simultaneously express the name and size of a capacitor. For example, "Ct" means a capacitor with the name Ct and also means a capacitance with the size Ct.

Referring to FIG. 16, the charging circuit (1612) is a circuit that selectively supplies a charging signal to the touch sensor (1610) at a necessary time. The charging circuit (1612) may be a three-terminal switching element that performs a switching operation according to a control signal supplied to an on/off control terminal, or a linear element such as an OP-AMP that supplies a signal according to a control signal.

The output terminal of the charging circuit (1612) is connected to Ct and Cvcom, which act on the touch sensor (1610). Therefore, when the charging circuit (1612) is turned on and a charging signal such as an arbitrary voltage or current is applied to the input terminal, Ct and Cvcom are charged. At this time, a parasitic capacitance (Cp), which is not shown, will also be charged. Afterwards, if the charging circuit (1612) is turned off, the charged signal is isolated unless the signals charged in Ct and Cvcom are separately discharged.

In order to stably isolate the charged signal, the input terminal of the touch input detection unit (1614) has high impedance (Hi-impedance or Hi-z). If the touch input is observed while discharging the signal charged to Ct and Cvcom, or the charging signal is isolated by other means, or the signal is quickly observed at the time of discharge initiation, the input terminal of the touch input detection unit (1614) does not necessarily have to be Hi-z.

The above touch input detection unit (1614) detects whether a signal level shifts in the touch sensor (1610). Preferably, the touch input detection unit (1614) can detect whether a level shift occurs in the voltage change in the touch sensor (1610) when a touch occurs (i.e., when Ct is added in parallel to Cvcom) in preparation for a voltage change in the touch sensor (1610) when a touch does not occur (i.e., when Ct is not formed), thereby obtaining a touch signal.

Referring to FIG. 17, a touch capacitance (Ct) is formed between a user's finger (1725) and a touch sensor (1710), and a common electrode capacitance (Cvcom) is formed between the touch sensor (1710) and a common electrode (1758).

For example, when no touch occurs, the voltage fluctuation in the touch sensor (1710) by Cvcom is determined by the following <Formula 1>.

<Formula 1>

Since Ct is added in parallel to Cvcom when a touch occurs, the voltage fluctuation in the touch sensor (1710) is determined by the following <Formula 2>.

<Formula 2>

In the above <Formula 1> and <Formula 2>, ΔVsensor is a voltage fluctuation in the touch sensor, VcomH is a high level voltage of the common electrode, VcomL is a low level voltage of the common electrode, Cvom is a common electrode capacitance, Cp is a parasitic capacitance, and Ct is a touch capacitance. The touch input detection unit (1614) detects a level shift in the touch sensor (1610) using the above <Formula 1> and <Formula 2>. This will be described in detail as follows.

In the above formulas, VcomH and VcomL are values that can be easily set. And Cvcom can be obtained from the following <Formula 3>.

<Formula 3>

In <Formula 3>, ε is the permittivity of the medium existing between the touch sensor (1710) and the common electrode (1758). For example, in the case of glass, since the relative permittivity is 3 to 5, the permittivity of the substrate (1715) can be obtained by multiplying this by the permittivity of the vacuum. In addition, the permittivity of other media can also be obtained in the same manner. Since S1 is a large area of the touch sensor (1710) and the common electrode (1758), it can be easily obtained.

As illustrated in Fig. 17, when the common electrode (1758) is formed over the entire interior of the display module (1750), the opposing area is determined by the area of the touch sensor (1710). In addition, since D1 is the distance between the touch sensor (1710) and the common electrode (1758), it corresponds to the thickness of the medium.

Here, referring to Fig. 17, at least one medium exists between the touch sensor (1710) and the common electrode (1758). When the above medium exists, Cvcom is similar to the capacitors generated on the opposite sides of each dielectric connected in series, and thus Cvcom can be obtained from this. As seen, Cvcom is a value that can be easily obtained and also a value that can be set.

Ct can be obtained from the following <Formula 4>.

<Formula 4>

In <Formula 4>, ε can be obtained from the medium between the touch sensor (1710) and the finger (1725). If glass is attached to the upper surface of the substrate (1715) in FIG. 7, the permittivity ε can be obtained from the value obtained by multiplying the relative permittivity of the glass by the permittivity of a vacuum. S2 corresponds to the area facing the touch sensor (1710) and the finger (1725). If the finger (1725) covers all of the touch sensor (1710), S2 corresponds to the area of the touch sensor (1710). If the finger (1725) covers a part of the touch sensor (1710), S2 will be reduced by the area of the touch sensor (1710) that is not facing the finger (1725).

In addition, since D2 is the distance between the touch sensor (1710) and the finger (1725), it will correspond to the thickness of the glass or protective panel placed on the upper surface of the substrate (1715). As seen, Ct is also a value that can be easily obtained, and can be easily set using a protective panel placed on the upper surface of the substrate (1715).

In particular, according to <Formula 4>, Ct is proportional to the opposing area of the finger (1725) and the touch sensor (1710), and thus, the touch occupancy rate of the finger (1725) with respect to the touch sensor (1710) can be calculated from this. The touch input detection unit (1614) detects whether a level shift has occurred in the voltage change according to <Formula 2> in comparison with the voltage change according to <Formula 1> as above.

According to an embodiment of the present invention, the touch input detection unit (1614) can detect that Ct changes to Ct' due to a user's pressure touch, as described above with reference to FIG. 13, or that Cvcom changes to Cvcom' due to a user's input touch, as described above with reference to FIG. 15.

The above touch input detection unit (1614) may be, for example, one of a touch drive IC (TDI), a display drive IC (LDI), or a touch display drive IC in which the touch drive IC and the display drive IC are integrated.

FIG. 18 is a cross-sectional view of a touch sensor and a sensor signal line formed on a pixel electrode layer according to an embodiment of the present invention. Referring to FIG. 18, a display device (1800) having a touch screen according to various embodiments of the present invention may have a structure almost similar to the structure described above with reference to FIG. 7.

According to an embodiment of the present invention, in the display device (1800), a mesh pattern (1830, 1831, 1832) formed as a touch sensor and a sensor signal line may be formed in a pixel electrode (18240) layer, and a through hole (1830h, 1831h, 1832h) for securing sensitivity of touch detection may be formed at a position corresponding to the touch sensor of the mesh pattern on the same line vertically.

For example, as illustrated in FIG. 18, a boundary area between pixel electrodes (18240) constituting an organic light-emitting diode (1824) may be an area corresponding to a BM area. In the boundary area between the pixel electrodes, a touch sensor and a sensor signal line for touch detection are formed as a mesh pattern (1830, 1831, 1832) of a transparent conductive material or a non-transparent metal material, so that the thickness of the display device can be efficiently reduced.

In some areas of the common electrode (18242) corresponding to the area where the above mesh pattern (1830, 1831, 1832) is formed and on the same line vertically, a through hole (1830h, 1831h, 1832h) may be formed to secure the sensitivity of touch detection.

Here, the through hole penetrates not only a portion of the common electrode (18242), but also an intermediary layer, for example, a pixel definition film (1816), existing between the mesh pattern (1830, 1831, 1832) and the common electrode (18242), thereby further increasing the sensitivity of touch detection.

FIG. 19 is a cross-sectional view of a touch sensor and a sensor signal line formed on a TFT layer according to an embodiment of the present invention. Referring to FIG. 19, a display device (1900) having a touch screen according to various embodiments of the present invention may have a structure almost similar to the structure described above with reference to FIG. 7.

According to an embodiment of the present invention, in the display device (1900), mesh patterns (1930, 1931, 1932) formed as touch sensors and sensor signal lines can be formed in a TFT layer, and through holes (1930h, 1931h, 1932h) for securing sensitivity of touch detection can be formed at positions corresponding to the touch sensors of the mesh pattern on the same line vertically.

For example, as illustrated in Fig. 19, a boundary area between driving source electrodes (1919) constituting a driving thin film transistor (T2) may be an area corresponding to a BM area. In the boundary area between the driving source electrodes, a touch sensor and a sensor signal line for touch detection are formed as a mesh pattern (1930, 1931, 1932) of a transparent conductive material or a non-transparent metal material, so that the thickness of the display device can be efficiently reduced.

In some areas of the common electrode (19242) corresponding to the area where the above mesh pattern (1930, 1931, 1932) is formed and on the same line vertically, a through hole (1930h, 1931h, 1932h) may be formed to secure the sensitivity of touch detection.

Here, the through hole penetrates not only a portion of the common electrode (19242), but also an intermediary layer, for example, a pixel definition film (1916) and a protective film (1915) existing between the mesh pattern (1930, 1931, 1932) and the common electrode (19242), thereby further increasing the sensitivity of touch detection.

For reference, in various embodiments of the present invention, as illustrated in FIG. 7, when the touch sensor is formed on the lower side of the common electrode, the through hole penetrates the common electrode, as illustrated in FIG. 18, when the touch sensor is formed in the pixel electrode layer, the through hole penetrates the common electrode and the pixel definition film, and as illustrated in FIG. 19, when the touch sensor is formed in the TFT layer, the through hole penetrates the common electrode, the pixel definition film, and the protective film.

However, the present invention is not limited to the examples and the attached drawings, and various substitutions, modifications, and changes are possible within the scope that does not depart from the technical spirit of the present invention.

FIG. 20 is an exemplary drawing for detecting a pressure touch of a touch capacitance (Ct) through a through hole according to an embodiment of the present invention. Referring to FIG. 20, a touch layer (2002) in which a touch sensor for touch detection and a sensor signal line are formed is disposed inside a display module (2001), and on the upper side of the touch layer (2002), it can be disposed below a common electrode (2003) included in the display module (2001).

An elastic member (2004) may be placed on the upper side of the display module (2001), and a protective film or flexible glass (2005) (or flexible substrate) may be placed on the upper side of the elastic member.

The above display module (2001) may be an LCD module or an OLED module, and the elastic member (2004) and the protective film or flexible glass (2005) may have an elastic force that allows the corresponding portion to bend when a user touches it with a finger and applies pressure, as shown in FIG. 20, for example.

At this time, since the distance between the user's finger and the touch layer becomes narrow, the touch capacitance used for touch detection changes from Ct to Ct'. For reference, the method for detecting the touch capacitance (Ct) has been described in detail with reference to FIGS. 16 and 17, and thus is omitted herein.

The change in touch capacitance as described above becomes a value corresponding to the pressure applied by the user's finger. That is, the first touch caused by the approach or contact of a touch input means such as the user's finger, and the second touch caused by the pressure applied by the touch input means can be distinguished and recognized.

Here, as illustrated in Fig. 20, since through holes (2003h) are formed between the common electrode (2003) and the touch layer (2002), the sensitivity of touch detection can be increased, so that, for example, multi-point touch detection becomes possible.

As described above, the embodiment described above with reference to FIG. 20 can be equally applied to all cases in which the touch layer is positioned below the common electrode, as described above with reference to FIG. 7, FIG. 18, and FIG. 19.

FIG. 21 is an exemplary drawing showing a touch screen divided into a first area and a second area according to an embodiment of the present invention. Referring to FIG. 21, the touch screen can be applied to various types of display devices, such as, for example, a smart phone (2100), and the smart phone (2100) can be divided into a non-display area (2110) and a display area (2120).

The above display area can be divided into a first area in the center and a second area (2130) on the outside, and according to an embodiment of the present invention, the second area (2130) on the outside can be divided into a number of sub-areas.

For example, the second area (2130) of the outer periphery can be divided into first to third sub-areas (2131, 2132, 2133), and when a pressure touch is detected in the second area of the outer periphery, any specific operation such as volume control, power control, and reset control can be quickly performed.

Before performing any specific operation as described above, a mode switching operation and a guidance display operation indicating the same may be performed first, and then specific operations such as volume control, power control, and reset control may be performed.

Here, the first central region can also be divided into a number of sub-regions, and the pressure touch can be detected and used to quickly perform any specific action.

Fig. 22 is a circuit diagram of a portable terminal to which an embodiment of the present invention is applied. Referring to Fig. 22, the portable terminal (2200) may include a control unit (2210), a touch screen (2220), an audio processing unit (2230), an interface unit (2240), a communication unit (2250), and a storage unit (2260).

The above control unit (2210) may be a processor or controller that performs or controls the overall operation of the portable terminal in conjunction with the touch screen (2220).

According to an embodiment of the present invention, the control unit (2210) may be connected to a touch screen (2220) divided into a first area in the center and a second area in the periphery as described above, and may perform an operation corresponding to a touch detected on the touch screen (2220).

The above control unit (2210) performs a first operation corresponding to the location of the first touch when a first touch is detected by approach or contact of a touch input means, for example, in a first area corresponding to the central portion of the touch screen.

On the other hand, when a second touch is detected by pressure of the touch input means in a second area corresponding to the outer portion of the touch screen, a second operation corresponding to the pressure of the second touch can be performed.

For example, the second operation may be set in advance to control at least one of the functions of the display device, such as volume control, power control, and reset control of the display device.

Meanwhile, when a second touch is detected in the second area, the control unit (2210) may compare the pressure of the second touch with a preset reference value and perform a second operation corresponding to the second touch pressure, or perform a different second operation depending on the difference from the reference value.

For example, in the same sub-area of the second area, if the pressure of the touch applied by the user is different, different second operations can be performed even at the same touch location. For example, even at the same touch location, if the difference between the touch input and the reference value is small, a volume control operation can be performed, and if the difference between the touch input and the reference value is large, a power control operation can be performed.

As such, it will be apparent to those skilled in the art that the present invention is not limited to the above-described embodiments and the attached drawings, and that various substitutions, modifications, and changes may be made without departing from the technical spirit of the present invention.

1301: Display module 1302: Touch layer
1303: Elastic member 1304: Protective film or flexible glass

Claims (16)

display module;
A touch layer disposed on the upper side of the display module;
An elastic member disposed on the upper side of the above touch layer;
A transparent film or flexible substrate disposed on the upper side of the elastic member; and
A touch input detection unit comprising:
In the above touch layer, touch sensors and sensor signal lines are formed in a mesh pattern,
The above touch input detection unit,
A first touch by approaching or contacting a touch input means,
Detects and distinguishes a second touch by pressing the above touch input means,
The second touch is detected by a change in touch capacitance or a change in common voltage capacitance between the touch input means and the touch sensor,
When the first touch is detected, a first operation corresponding to the location of the first touch is performed,
A display device having a touch screen, characterized in that when the second touch is detected, a second operation different from the first operation is performed at a different location from the location of the first touch.
In the first paragraph,
A display device having a touch screen, characterized in that the above mesh pattern is formed in an area corresponding to a boundary area between a plurality of pixels.
In the first paragraph,
A display device having a touch screen, characterized in that the display module is any one of an LCD (Liquid Crystal Display), an AMOLED (Active Matrix Organic Light-Emitting Diode), or a PMOLED (Passive Matrix Organic Light-Emitting Diode).
In the first paragraph,
A display device having a touch screen, wherein the mesh pattern is characterized by being a transparent conductive material or a non-transparent metal material.
In the first paragraph,
The above touch sensors are arranged in a dot matrix structure,
A display device having a touch screen, characterized in that the touch screen has an area of different sizes depending on the distance between the touch sensors and the touch drive IC formed outside the dot matrix structure.
In the first paragraph,
A display device having a touch screen, characterized in that a plurality of sensor signal lines are connected to the above touch sensor.
In the first paragraph,
A display device having a touch screen, characterized in that the touch sensors and sensor signal lines are positioned on the same line vertically with a driving signal line that drives a pixel, and the driving signal line includes at least one of a source signal line and a gate signal line built into a module in the display.
In the first paragraph,
A display device having a touch screen, characterized in that the above touch input detection unit is any one of a touch drive IC (TDI), a display drive IC (LDI), or a touch display drive IC in which the touch drive IC and the display drive IC are integrated.
display module;
An elastic member disposed on the upper side of the display module;
A touch layer disposed on the upper side of the elastic member;
A transparent film or flexible substrate disposed on the upper side of the above touch layer; and
A touch input detection unit comprising:
In the above touch layer, touch sensors and sensor signal lines are formed in a mesh pattern,
The above touch input detection unit,
A first touch by approaching or contacting a touch input means,
Detects and distinguishes a second touch by pressing the above touch input means,
The second touch is detected by a change in touch capacitance or a change in common voltage capacitance between the touch input means and the touch sensor,
When the first touch is detected, a first operation corresponding to the location of the first touch is performed,
A display device having a touch screen, characterized in that when the second touch is detected, a second operation different from the first operation is performed at a different location from the location of the first touch.
In Article 9,
A display device having a touch screen, characterized in that the above mesh pattern is formed in an area corresponding to a boundary area between a plurality of pixels.
In Article 9,
A display device having a touch screen, characterized in that the display module is any one of an LCD (Liquid Crystal Display), an AMOLED (Active Matrix Organic Light-Emitting Diode), or a PMOLED (Passive Matrix Organic Light-Emitting Diode).
In Article 9,
A display device having a touch screen, wherein the mesh pattern is characterized by being a transparent conductive material or a non-transparent metal material.
In Article 9,
The above touch sensors are arranged in a dot matrix structure,
A display device having a touch screen, characterized in that the touch screen has an area of different sizes depending on the distance between the touch sensors and the touch drive IC formed outside the dot matrix structure.
In Article 9,
A display device having a touch screen, characterized in that a plurality of sensor signal lines are connected to the above touch sensor.
In Article 9,
A display device having a touch screen, characterized in that the touch sensors and sensor signal lines are positioned on the same line vertically with a driving signal line that drives a pixel, and the driving signal line includes at least one of a source signal line and a gate signal line built into a module in the display.
In Article 9,
A display device having a touch screen, characterized in that the above touch input detection unit is any one of a touch drive IC (TDI), a display drive IC (LDI), or a touch display drive IC in which the touch drive IC and the display drive IC are integrated.