KR20170126569A - Touch display device and frame structure - Google Patents

Abstract

The present invention relates to a touch display device and a frame structure. More specifically, the touch display device comprises: a display module which includes a display panel; and a frame structure which is positioned under the display module. Among a plurality of first electrodes and at least one second electrode driven as force sensors during a driving section for sensing touch force applied onto the display panel, the plurality of first electrodes are built in the display panel, and the second electrode is included in the frame structure. According to the present invention, two kinds of force sensors necessary for sensing touch force are distributed in the display module and the frame structure, and it is possible to efficiently provide a force sensing structure.

Description

TOUCH DISPLAY DEVICE AND FRAME STRUCTURE [0002]

These embodiments relate to a touch display device.

BACKGROUND ART [0002] As an information-oriented society develops, there have been various demands for display devices for displaying images, and various types of display devices such as a liquid crystal display device, a plasma display device, and an organic light emitting display device have been utilized.

Among display devices, mobile devices such as smart phones and tablets, and medium and large-sized devices such as smart TVs, etc., provide touch-based input processing according to user convenience and device characteristics.

Such a display device capable of touch input processing is being developed to provide more various functions, and user demands are also becoming more diverse.

However, currently applied touch input processing is a method of sensing only the touch position (touch coordinates) of the user and performing related input processing at the sensed touch position, and it provides a variety of various functions in various forms, There is a limit to the current situation that needs to be met.

It is an object of the embodiments of the present invention to provide various functions in various forms so as to not only sense touch coordinates when a user generates a touch but also to sense a touch force And to provide a touch display device.

Another object of the present invention is to provide a touch display device capable of sensing a touch force utilizing an existing structure.

Another object of the present invention is to provide a touch display device in which a first electrode and a second electrode as a force sensor for sensing a touch force are included in a display module and a frame structure, respectively.

Another object of the present invention is to provide a frame structure serving as a force sensor for sensing a touch force.

The present embodiments can provide a touch display device in which two force sensors necessary for sensing a touch force are dispersedly arranged in a display module and a frame structure.

The present embodiments can provide a display module including a display panel in which a plurality of data lines and a plurality of gate lines are arranged, and a touch display device including a frame structure positioned under the display module.

The touch display device may further include a plurality of first electrodes and at least one second electrode that are driven as a force sensor during a driving period for sensing a touch force applied to an upper portion of the display panel .

In this touch display device, among the two force sensors, a plurality of first electrodes may be embedded in the display panel, and a second electrode may be included in the frame structure.

The present embodiments can provide a frame structure that is positioned under the display module including the display panel.

Such a frame structure can be utilized as a structure for sensing a touch force.

To this end, the frame structure may include an elastic plate located at the bottom of the display module, a conductive plate located at the bottom of the elastic plate, and an outer frame located at the periphery of the elastic plate and the conductive plate.

The conductive plate included in such a frame structure may receive a driving signal (second electrode driving signal) during a driving period for sensing a touch force applied to an upper portion of the display panel.

That is, the conductive plate may correspond to the second one of the two force sensors for sensing the touch force.

The present embodiments can provide a touch display device including a display panel in which a plurality of data lines and a plurality of gate lines are arranged and a flexible printed circuit (first flexible printed circuit) electrically connected to the display panel .

The touch display apparatus may further include a plurality of first electrodes embedded in the display panel, and at least one second electrode located outside the display panel.

The touch display device may further include a connection line connected between the flexible printed circuit (e.g., the first flexible printed circuit) and the second electrode.

At least one of the plurality of first electrodes built in the display panel through the flexible printed circuit (e.g., the first flexible printed circuit) during the driving period for sensing the touch force applied to the upper portion of the display panel The first electrode driving signal may be applied.

During the driving period for sensing the touch force applied to the upper portion of the display panel, the second electrode driving signal is applied from the flexible printed circuit (e.g., the first flexible printed circuit) to the second electrode .

According to the embodiments described above, in order to provide various functions in various forms, not only the touch coordinates are sensed at the time of user's touch, but also the touch force, Can be provided.

In addition, according to the embodiments, a touch display device having a structure capable of sensing a touch force utilizing an existing structure can be provided.

According to the embodiments of the present invention, it is possible to provide a touch display device in which a first electrode and a second electrode corresponding to two force sensors for sensing a touch force are included in the display module and the frame structure, respectively.

In addition, according to the embodiments, a frame structure serving as a force sensor for sensing a touch force can be provided.

In addition, according to the embodiments, two force sensors necessary for sensing a touch force can be dispersedly disposed in the display module and the frame structure, and a force sensing structure can be efficiently provided.

FIG. 1 is a schematic configuration diagram of a touch display device according to the present embodiments.
FIG. 2 is a schematic view of a force sensor structure of a touch display device according to the present embodiments.
3 is a view illustrating an operation mode of the touch display device according to the present embodiments.
4 is a view for explaining the sensing principle of the touch display device according to the present embodiments.
5 illustrates examples of the first electrode driving signal for driving the first electrode and the second electrode driving signal for driving the second electrode in the touch display device according to the present embodiments.
6A and 6B are diagrams for explaining the case where the first electrode driving signal DS1 and the second electrode driving signal DS2 are both pulse-like signals when the first electrode driving signal DS1 and the second electrode driving signal DS2 are pulse- ). ≪ / RTI >
7 is a diagram illustrating an example of a touch sensing circuit of the touch display device according to the present embodiments.
FIG. 8 is a diagram illustrating a received signal strength according to the soft touch and a received signal strength according to the force touch in the touch display device according to the present embodiments.
9A and 9B are diagrams showing signal intensity distributions according to a soft touch and a force touch in a touch display device according to the present embodiments.
10 and 11 are views schematically showing a touch display device according to the present embodiments.
12 is a cross-sectional view of the touch display device according to the present embodiments.
FIG. 13 is a view illustrating a situation in which a force is generated in a touch display device according to the present embodiments, and a size of a gap is changed.
14 is a view illustrating a display module and a frame structure of the touch display device according to the present embodiments.
FIGS. 15A, 15B, 16A, 16B, and 16C are cross-sectional views of a touch display device according to the present invention, in which the second electrode is present inside the display module.
FIG. 17 is a cross-sectional view of a touch display device according to the present embodiments, in which the second electrode is present outside the display module.
FIG. 18 is a more detailed view of a display module and a frame structure of the touch display device according to the present embodiments.
19 is a view illustrating a first electrode driving signal transmission path and a second electrode driving signal transmission path of four cases when the second electrode is present inside the display module in the touch display device according to the present embodiments to be.
20 and 21 are views showing a second electrode driving signal transmission path corresponding to Case 1.
FIGS. 22 and 23 are views showing a second electrode driving signal transmission path corresponding to Case 2. FIG.
FIGS. 24 and 25 are diagrams illustrating a second electrode driving signal transmission path corresponding to Case 3. FIG.
FIGS. 26 and 27 are views showing a second electrode driving signal transmission path corresponding to Case 4. FIG.
28 is a view illustrating a first electrode driving signal transmission path and a second electrode driving signal transmission path of two cases when the second electrode is present outside the display module in the touch display device according to the present embodiments to be.
FIG. 29 is a view illustrating a second electrode driving signal transmission path corresponding to Case A. FIG.
30 is a view illustrating a second electrode driving signal transmission path corresponding to Case B. In FIG.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to denote like elements throughout the drawings, even if they are shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the components from other components, and the terms do not limit the nature, order, order, or number of the components. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; intervening "or that each component may be" connected, "" coupled, "or " connected" through other components.

FIG. 1 is a schematic structural view of a touch display device 100 according to the present embodiment. FIG. 2 is a schematic view illustrating a force sensor structure of a touch display device 100 according to the present embodiments. And FIG. 3 is a diagram illustrating an operation mode of the touch display device 100 according to the present embodiments.

1 to 3, the touch display device 100 according to the present embodiments may operate in a display mode for displaying an image or may be a touch mode for sensing a touch of a user ). ≪ / RTI >

The touch display device 100 according to the present exemplary embodiment drives a plurality of data lines DL and a plurality of gate lines GL arranged in the display panel 110 to display an image do.

The touch display device 100 according to the present embodiments has a touch position sensing function for sensing whether a touch is generated and touching a touch generated by a pointer such as a finger or a pen when the touch screen device operates in a touch mode And a touch force sensing function of sensing a touch force (also simply referred to as " force ") corresponding to a force (pressure) applied to the display panel 110 at the time of touch.

The touch referred to herein means an action in which a user touches the display panel 110 with a pointer.

Such a touch includes a "soft touch" that is a touch having no pressure or a certain level of pressure on the display panel 110, a force (pressure) that presses the display panel 110, Quot; Force Touch ", which is a touch that exceeds a predetermined value.

The " touch position " in accordance with the soft touch or the force touch means the position of the point where the user touches the display panel 110, and is also referred to as touch coordinates.

The " Touch Force " according to the force touch refers to the force (pressure) that the user presses the display panel 110 when touched.

On the other hand, the pointer to which the user touches the screen may be a conductor pointer such as a part of a human body such as a finger or a pen having a contact portion as a conductor. In some cases, the contact portion may be a nonconductive pointer such as a non-conductive pen or the like.

The pointer that allows you to sense the touch location must be a conductor pointer.

In contrast, the pointer for sensing the touch force may be a conductor pointer as well as a conductor pointer.

1 and 2, the touch display device 100 according to the present embodiment includes a plurality of first electrodes E1 embedded in a display panel 110, The second electrode E2 and the plurality of first electrodes E1 are sequentially driven to sense the touch position and at least one of the plurality of first electrodes E1 and the second electrode E2 And a touch circuit 120 for sensing the touch force by being driven together.

The plurality of first electrodes E1 is an electrode used for sensing a touch position and is called a " touch sensor " or a " touch electrode ".

The plurality of first electrodes E1 may be disposed on a touch screen panel separate from the display panel 110 and may be embedded in the display panel 110 as shown in FIG. .

If a plurality of first electrodes E1 are embedded in the display panel 110, the display panel 110 may be referred to as a " touch screen panel integrated display panel " in which a plurality of first electrodes E1 are embedded .

The second electrode E2 may include a second electrode E2 that is used to sense a touch force corresponding to a force (pressure) applied to the display panel 110 when the user touches the display panel 110, to be.

The second electrode E2 may be located outside (e.g., lower, upper, lateral, etc.) of the display panel 110.

In order to sense the touch position, the touch display device 100 according to the present embodiment sequentially drives at least one of the plurality of first electrodes E1 to sequentially receive signals It is possible to sense the change in capacitance between each first electrode E1 and the pointer from the touch sensor RS to sense the touch position.

In contrast, in the touch display device 100 according to the present embodiment, a plurality of first electrodes E1 and a plurality of second electrodes E2 must be driven together to sense a touch force.

In other words, in the touch display device 100 according to the present embodiment, in order to sense the touch position, the touch circuit 120 outputs a first electrode driving signal DS1 to at least one of the plurality of first electrodes E1 Sequentially driving the plurality of first electrodes E1.

In this specification, in order to sense the touch position, the first electrode driving signal DS1 applied to the first electrode E1 is also referred to as a " touch driving signal TDS ".

In the touch display device 100 according to the present embodiment, the touch circuit 120 applies a first electrode driving signal DS1 to at least one of the plurality of first electrodes E1 in order to sense the touch force. At the same time, the first electrode E1 and the second electrode E2 are driven together by applying the second electrode driving signal DS2 to the second electrode E2.

Since the first electrode E1 and the second electrode E2 are driven together for sensing the touch force in the touch display device 100 according to the present embodiment, The electrode E1 and the second electrode E2 located outside the display panel 110 may be combined to be referred to as a " force sensor ".

Meanwhile, the plurality of first electrodes E1 may operate not only as a touch sensor and a force sensor during a touch mode period, but also as a display driving electrode to which a display driving voltage is applied in a display mode period.

For example, the plurality of first electrodes E1 may be a common electrode to which a common voltage Vcom corresponding to a display driving voltage is applied during a display mode period.

In this way, when a plurality of first electrodes E1 are also used as a display driving electrode, the first electrodes E1 serve as three functions of a touch sensor, a force sensor, and a display driving electrode.

Referring to FIG. 2, in order to enable touch force sensing, the touch display device 100 includes a plurality of first electrodes G1, G2, G3, E1) and the second electrode (E2).

This gap G may be, for example, an air gap or a dielectric gap.

Accordingly, a capacitor whose size varies according to the touch force is formed between the first electrode E1 and the second electrode E2, thereby allowing the touch force to be sensed.

On the other hand, in the touch display device 100, the driving for sensing the touch position and the sensing for sensing the touch force may be temporally separated or progressed together.

In the case where the driving for sensing the touch position and the driving for sensing the touch force are separated in time, each touch mode section may be a driving section for sensing the touch position or a driving section for sensing the touch force And may be a section including a driving section for sensing the touch position and a driving section for sensing the touch force.

When the driving for sensing the touch position and the driving for sensing the touch force are performed together, the first electrode E1 and the second electrode E2 are driven together for one or two or more touch mode periods, E1, the touch position and the touch force are sensed together.

4 is a diagram for explaining the sensing principle of the touch display device 100 according to the present embodiments.

4 is a diagram illustrating a sensing operation for three types of touch (Type 1, Type 2, and Type 3) according to the type of the pointer that the user touches the display panel 110 and the presence or absence of the touch force.

Referring to FIG. 4, the touch type includes a Type 1 corresponding to a soft touch generated by a pointer generated by a touch whose contact portion is a conductor and generated by a pressing force less than a predetermined level, Type 2 generated by a force generated by a force exceeding a certain level and a force 2 generated by a pressing force generated by a pointer whose touch is an inductive contact and exceeding a predetermined level Force Touch).

4, the touch circuit 120 sequentially applies a first electrode driving signal DS1 to a plurality of first electrodes E1 in a touch mode period and sequentially applies a first electrode driving signal DS1 to a second electrode E2, And applies drive of the electrode drive signal DS2 to drive the touch position and touch force sensing.

A first capacitance C1 may be formed between the first electrode E1 and a pointer corresponding to the first touch type according to driving in the touch mode section by the touch circuit 120. The first capacitance E1 And a second capacitance C2 may be formed between the second electrode E2 and the second electrode E2.

The first capacitance C1 formed between the first electrode E1 and the pointer may vary depending on whether or not a touch is generated.

The second capacitance C2 formed between the first electrode E1 and the second electrode E2 may vary depending on the presence (size) of the touch force.

Therefore, the touch circuit 120 can grasp the change in the size of the first capacitance C1 and the change in the size of each of the second capacitances C2 based on the signal received at each of the first electrodes E1, The touch position can be sensed based on the change in the size of the capacitance C1 and the touch force can be sensed based on the change in the size of the second capacitance C2.

When the force touch occurs at a certain point, the size of the gap G changes. As a result, the size of the second capacitance C2 between the first electrode E1 and the second electrode E2 is changed, and the touch force sensing function for sensing the touch force from the change in size of the second capacitance C2 Can be performed.

Here, the touch force sensing result may include presence / absence information of the touch force, and may include the size information of the touch force or the level information of the size of the touch force.

The touch display device 100 according to the present embodiments can sense the touch force in a capacitive manner in the same manner as the touch position (touch coordinates) sensing method.

In other words, in order to sense the touch force (pressing force) of a touch, the touch display device 100 according to the present embodiments uses a dedicated pressure sensor for pressure sensing alone A second electrode E2 located outside the display panel 110 for touch force sensing and a plurality of first electrodes E1 embedded in the display panel 110 for touch coordinate calculation are used together to calculate a capacitance There is a singular point in that it senses the touch force.

As described above, although the touch circuit 120 drives the first electrode E1 and the second electrode E2 in the same manner during the touch mode interval, information to be sensed may vary depending on the touch type.

4, when the touch is a type 1 corresponding to a soft touch generated by a pointer having a contact as a conductor and generated by a pressing force less than a predetermined level, It is possible to sense only the touch position with respect to the touch based on a signal received from each first electrode E1 after driving the first electrode E1 and the second electrode E2.

This is because when the touch is a Type 1 corresponding to a soft touch generated by a pointer generated by a conductor whose contact portion is a conductor and generated by a pressing force of a certain level or less, the first capacitance E1 with respect to each first electrode E1, A change in the size of the first capacitance E1 and a change in the capacitance of the second capacitance C2 between the first electrode E1 and the second electrode E2 does not occur so that only the touch position can be sensed.

4, if the touch is a Type 2 corresponding to a Forcet Touch generated by a pointer generated by a conductor whose contact portion is a conductor and exceeds a predetermined level, The touch position and the touch force can be simultaneously sensed with respect to the touch based on the signal received from the first electrode E1.

This is because if the touch is Type 2 corresponding to a force touch generated by a pointer having a contact as a conductor and generated by a pressing force exceeding a certain level, Both the change in the size of the capacitance C1 and the change in the size of the second capacitance C2 between the first electrode E1 and the second electrode E2 occur, It is possible to sense.

4, when the touch is Type 3 corresponding to a force touch generated by a pointer having a non-conductive contact portion and a pressing force exceeding a predetermined level, Based on a signal received from each first electrode E1, only the touch force can be sensed with respect to the touch.

This is because if the touch is Type 3 corresponding to a force touch generated by a pointer whose contact portion is nonconductive and which is generated by a pressing force exceeding a certain level, The capacitance C1 is not generated at all but a change in the size of the second capacitance C2 between the first electrode E1 and the second electrode E2 is generated so that only the touch force can be sensed for one touch .

As described above, the touch display apparatus 100 has a gap structure between the first electrode E1 and the second electrode E2, and performs a sensing process based on a signal received via the first electrode E1 Even if the first electrode E1 and the second electrode E2 are driven in the same manner during the touch mode and the signal detection and sensing process is performed in the same manner regardless of the type of the touch type, The sensing information can be obtained.

Hereinafter, the first electrode driving signal DS1 and the second electrode driving signal DS2 for touch driving during the touch mode section will be described.

During the touch mode period, the first electrode driving signal DS1 applied to the first electrode E1 may be regarded as a touch driving signal in a touch sensing function for sensing the touch position, and a force sensing function On the side, it can be regarded as a force drive signal.

In addition, during the touch mode period, the second electrode driving signal DS2 applied to the second electrode E2 corresponds to the force driving signal in terms of the force sensing function for sensing the touch force.

During the touch mode in which the touch display device 100 according to the present embodiment operates in the touch mode, the touch position and the touch force may be sensed at the same time or may be independently sensed through driving in different sections .

FIG. 5 is a circuit diagram of a touch display apparatus 100 according to an embodiment of the present invention. In FIG. 5, the first electrode driving signal DS1 for driving the first electrode E1 and the second electrode driving signal DS2 for driving the second electrode E2, Are examples of the driving signal DS2.

Referring to FIG. 5, the first electrode driving signal DS1 may be a pulse-shaped signal having a predetermined frequency, amplitude, and phase, or may be a signal having a DC voltage.

When the first electrode driving signal DS1 is a pulse-like signal, the amplitude of the first electrode driving signal DS1 may be the first voltage V1.

When the first electrode driving signal DS1 is a signal having a DC voltage, the DC voltage of the first electrode driving signal DS1 is not the ground voltage GND or the ground voltage GND but the first reference voltage Vref1 . Here, the first reference voltage Vref1 may be, for example, a common voltage Vcom.

Referring to FIG. 5, the second electrode driving signal DS2 may be a pulse-shaped signal having a predetermined frequency, amplitude, and phase, or may be a signal having a DC voltage.

When the second electrode driving signal DS2 is a pulse-shaped signal, the amplitude of the second electrode driving signal DS2 may be the second voltage V2.

When the second electrode driving signal DS2 is a signal having a DC voltage, the DC voltage of the second electrode driving signal DS2 is not the ground voltage GND or the ground voltage GND but the second reference voltage Vref2 . Here, the second reference voltage Vref2 may be, for example, the common voltage Vcom.

The first reference voltage Vref1 and the second reference voltage Vref2 may be the same or different.

As described above, the first electrode driving signal DS1 and the second electrode driving signal DS2 may be pulse-shaped signals or DC voltage signals, respectively.

In driving for sensing the touch position and sensing for sensing the touch force, examples of the first electrode driving signal DS1 and the second electrode driving signal DS2 illustrated in FIG. 5 may be used in combination.

Accordingly, the touch display device 100 can provide driving suitable for a driving method, a power source environment, and the like.

6A and 6B are diagrams for explaining the case where the first electrode driving signal DS1 and the second electrode driving signal DS2 are both pulse-like signals when the first electrode driving signal DS1 and the second electrode driving signal DS2 are pulse- ). ≪ / RTI >

6A and 6B, when both the first electrode driving signal DS1 and the second electrode driving signal DS2 are pulsed signals, the first electrode driving signal DS1 and the second electrode driving signal DS2) may have the same frequency.

However, the first electrode driving signal DS1 and the second electrode driving signal DS2 may have the same phase as shown in FIG. 6A, or may have different phases as shown in FIG. 6B.

6A, when the first electrode driving signal DS1 and the second electrode driving signal DS2 have the same phase, the first electrode driving signal DS1 and the second electrode driving signal DS2 are set to the positive It is said to be in phase relation.

6B, when the first electrode driving signal DS1 and the second electrode driving signal DS2 have different phases, the first electrode driving signal DS1 and the second electrode driving signal DS2 are 180 It is possible to have a phase difference of FIG.

In this case, it is assumed that the first electrode driving signal DS1 and the second electrode driving signal DS2 are in an inverse phase relationship.

When both the first electrode driving signal DS1 and the second electrode driving signal DS2 are pulsed signals, the first electrode driving signal DS1 and the second electrode driving signal DS2 are in a positive phase relationship Or an inverse phase relationship.

Therefore, it is possible to perform driving for sensing the touch force using the first electrode driving signal DS1 and the second electrode driving signal DS2 in pulse form suitable for the driving environment and the driving signal generating configuration.

6A, when the first electrode driving signal DS1 and the second electrode driving signal DS2 are in a positive phase relationship, the amplitude V2 of the second electrode driving signal DS2 is set to be May be larger than the amplitude V1 of the one electrode driving signal DS1.

Thus, when the one-electrode driving signal DS1 and the second electrode driving signal DS2 are in a positive phase relationship, the amplitude V2 of the second electrode driving signal DS2 is set equal to the amplitude V2 of the first electrode driving signal DS1. The touch position related information included in the signal RS detected through the first electrode E1 can be accurately distinguished from the touch position related information. Thus, the touch force sensing can be accurately performed based on the signal RS detected through the first electrode E1.

7 is an exemplary diagram of a touch circuit 120 of the touch display device 100 according to the present embodiments.

7, the touch circuit 120 may include a first electrode driving signal supply unit 710, a second electrode driving signal supply unit 720, an integrator 730, and the like.

The first electrode driving signal supply unit 710 supplies the first electrode driving signal DS1 of the signal waveform shown in FIG. 5 or the like to the first electrode driving signal DS1 through on / off control of the two switches SW1 and SW10, (E1).

The second electrode driving signal supply unit 720 supplies the second electrode driving signal DS2 of the signal waveform or the like shown in FIG. 5 to the second electrode (not shown) through on / off control of the two switches SW2 and SW20 E2.

The integrator 730 may include an operational amplifier OP-AMP, a capacitor C and a resistor R. The integrator 730 outputs an integral value to the input of the input terminal electrically connected to the first electrode E2 can do.

The touch circuit 120 includes an analog-to-digital converter (ADC) for converting the output value of the integrator 730 into a digital value and a touch position calculation and touch force recognition based on the digital value output from the analog- And a processor 740 for executing the program.

Here, at least one of the analog-to-digital converter (ADC) and the processor 740 may be external to the touch circuit 120.

The circuit configuration of the driving circuit 120 shown in Fig. 7 is merely an example for convenience of explanation, and may be implemented in various forms.

7, the touch circuit 120 applies a first electrode driving signal DS1 to the first electrode E1 and a second electrode driving signal DS2 to the second electrode E2, After the driving signal DS2 is applied, a value Vsen obtained by integrating the signal RS received from the first electrode E1 through the integrator 730 is converted into a digital value.

Based on the digital value of each first electrode E1, it is possible to detect at least one of the touch position and the touch force by grasping a charge amount (or a voltage) depending on the presence or absence of a touch and the presence or absence of a touch force.

7, the signal received from the first electrode E1 (input to the integrator 830) is a sum of the amount of charge Q1 charged in the capacitor between the pointer and the first electrode E1, And the amount of charge Q2 charged in the capacitor between the first electrode E1 and the second electrode E2 corresponds to the summed charge amount Q1 + Q2.

The amount of charge Q1 charged in the capacitor between the pointer and the first electrode E1 is increased by the voltage V1 of the first capacitance C1 and the first electrode driving signal DS1 Can be determined. The amount of charge Q2 charged in the capacitor between the first electrode E1 and the second electrode E2 is determined by the second capacitance C2, the voltage V1 of the first electrode driving signal DS1, Can be determined by the voltage V2 of the signal DS2.

The amount of charge Q1 charged in the capacitor between the pointer and the first electrode E1 and the amount of charge Q2 charged in the capacitor between the first electrode E1 and the second electrode E2 are expressed by the following equations Can be expressed as:

The total charge amount Q1 + Q2 is charged in the capacitor C in the integrator 830 and output from the integrator 830 to the sensing voltage value Vsen.

Accordingly, the analog-to-digital converter (ADC) converts the sensing voltage value Vsen into a digital value.

The processor 740 can sense at least one of the touch position and the touch force based on the digital value (sensing value) output to the analog-to-digital converter (ADC).

On the other hand, when the touch force is detected, a predetermined application or function corresponding to the touch force can be executed.

Alternatively, if a touch force is detected, a predetermined application or function corresponding to the size of the touch force may be executed.

FIG. 8 is a graph showing a received signal strength according to a soft touch and a received signal strength according to a force touch in the touch display device 100 according to the present embodiments.

8A and 8B, it is assumed that both the first electrode driving signal DS1 and the second electrode driving signal DS2 are pulse-shaped signals, as shown in FIGS. 6A and 6B, , And a force touch corresponding to the third touch type.

Referring to FIG. 8, the signal intensity of the received signal RS received at the first electrode E1 can be confirmed by a digital value output from the analog-to-digital converter (ADC).

8, a digital value output from an analog digital converter (ADC) when there is no pressing force or a soft touch of a certain level or less is output from an analog-to-digital converter (ADC) (+) Direction with respect to the digital value (baseline) at which the signal is detected.

Referring to FIG. 8, when the first electrode driving signal DS1 and the second electrode driving signal DS2 are in a positive phase relationship, the contact portion may be a non-conductive pointer, When a force touch occurs, the digital value output from the analog-to-digital converter (ADC) has a value in the negative direction with respect to the baseline.

Referring to FIG. 8, when the first electrode driving signal DS1 and the second electrode driving signal DS2 are in a reverse phase relationship, there is a force that the contact portion is pressed by the non-conductive pointer, When a touch occurs, the digital value output from the analog-to-digital converter (ADC) has a value in the positive direction with respect to the baseline.

9A and 9B are diagrams showing a signal intensity distribution according to a soft touch and a force touch in the touch display device 100 according to the present embodiments.

9A and 9B are diagrams showing a signal intensity distribution according to a soft touch and a force touch in the entire region (XY plane) of the display panel 110 of the touch display device 100 according to the present embodiments to be.

Referring to FIG. 9A, when a soft touch occurs at a certain point in the entire region of the display panel 110, the magnitude (signal intensity) of the digital value output from the analog / digital converter (ADC) The signal intensity increases in the direction of positive (+) direction of the z axis as a whole with respect to the baseline.

In addition, when the soft touch is generated, the signal intensity distribution can be intensively distributed at the point where the soft touch occurs in the entire screen region (the entire region of the display panel 110).

9B, assuming that the second electrode E2 is one plate electrode type, when a force touch occurs, the magnitude of the digital value output from the analog-to-digital converter (ADC) Signal intensity) has a distribution in which the signal intensity increases in the negative direction of the z axis as a whole with respect to the baseline.

Also, when a force touch is generated, the signal intensity at the center of the screen is the largest in the negative (-) direction, but the signal intensity gradually increases from the center of the screen to the center.

On the other hand, as the force touch increases, the magnitude of the gap G between the first electrode E1 and the second electrode E2 increases, and thus the digital value output from the analog-to-digital converter ADC , And has a larger value in the negative (-) direction of the z axis with respect to the base line. That is, as the strength of the force touch increases, the intensity of the signal increases.

FIGS. 10 and 11 are views schematically showing the touch display device 100 according to the present embodiments.

10, the touch display device 100 according to the present embodiment includes a plurality of first electrodes E1 embedded in a display panel 110 and a plurality of first electrodes E1 disposed outside the display panel 110 And a second electrode E2 located at a lower portion of the substrate.

In order to enable force sensing, a gap G capable of changing the size according to the force touch must be provided between the first electrode E1 and the second electrode E2.

Accordingly, the touch display device 100 according to the present exemplary embodiment may form a gap G between the first and second electrodes E1 and E2, And may also include a gap structure unit 1000 that enables change.

Force sensing can be enabled by this gap structure unit 1000.

The gap structure unit 1000 may have a shape corresponding to the shape of the frame of the display panel 110 (e.g., a frame type).

The gap structure unit 1000 may be a new structure, or may utilize an existing structure such as a guide panel.

The touch display device 100 according to the present embodiments may be various types of display devices such as a liquid crystal display device and an organic light emitting display device.

Hereinafter, for convenience of explanation, it is assumed that the touch display device 100 according to the present embodiments is a liquid crystal display device.

11, in the touch display device 100 according to the present embodiment, the display panel 110 includes a first substrate 1110 on which a thin film transistor (TFT) is disposed, And a second substrate 1120 on which a color filter (CF) and the like are disposed.

The driving chip 1130 may be mounted, bonded, or connected to a rim portion (non-active region) of the first substrate 1110.

Here, the driving chip 1130 may be a chip implementing a data driving circuit, a chip implemented by including a first electrode driving circuit for driving the first electrode E1, a first electrode driving circuit and a data driving circuit And may be a chip including the touch circuit 120, as the case may be.

Referring to FIG. 11, the lower structure 1100 may be positioned below the display panel 110.

Here, the lower structure 1100 may be, for example, a backlight unit, or may be any structure located at a lower portion of the display panel 110.

The gap structure unit 1000 may be located on the bottom, inside, or on the side of such a substructure 1100.

And the second electrode E2 may be positioned below the gap structure unit 1000. [

The second electrode E2 may be located under the lower structure 1100 of the display panel 110 or the like.

As described above, by designing various positions of the second electrode E2 and the like, it is possible to design the force sensor structure suitable for the design structure of the display panel 110 and the touch display device 100. [

12 is a sectional view of the touch display device 100 according to the present embodiments.

12 illustrates a case where the touch display device 100 according to the present embodiment is a liquid crystal display device and includes a plurality of first electrodes E1 and a plurality of second electrodes E2, Fig.

12, the display panel 110 includes a first polarizer 1210, a first substrate 1110, a plurality of first electrodes E1, a second substrate 1120, a second polarizer 1220, and the like. .

On the display panel 110, a bonding layer 1230 and an upper cover 1240 are positioned.

The lower structure 1100 is positioned below the display panel 110.

The substructure 1100 may be a structure already present in the display device or a structure separately provided for the second electrode E2.

For example, the substructure 1100 may be, for example, a backlight unit of a liquid crystal display device, a cover bottom, a back cover, and the like. In addition, it is possible to use any structure that does not disturb the electric field generated by the first electrode E1 so that a capacitor can be formed between the first electrode E1 and the second electrode E2.

As described above, the touch system 100 suitable for a liquid crystal display device can be realized by disposing the second electrode E2 under or in the lower structure 1100 corresponding to the backlight unit.

Meanwhile, in the case of the liquid crystal display device, in order to form the second capacitance C2 between the first electrode E1 and the second electrode E2, the first electrode E1 and the second electrode E2 are formed with silver (Ag), a reflective layer, a transparent electrode layer, and the like.

FIG. 13 is a view showing a situation in which the size of the gap G changes due to the force touch occurring in the touch display device 100 according to the present embodiments.

13, when the force touch occurs, the upper cover 1240, the display panel 110, and the lower structure 1100 receive the force downward, so that the lower structure 1100, Bending down finely.

Accordingly, the size of the gap G between the lower structure 1100 and the second electrode E2 can be changed.

That is, the gap G before the force touch is generated is G1, and the gap G after the force touch is generated is G2 smaller than G1.

As described above, since the gap G is reduced from G1 to G2 before and after the force touch, the second capacitance C2 is changed and the force touch can be recognized.

As described above, some examples of the gap structure unit 1000 for allowing the size of the gap to change according to the touch force for the touch force sensing and to change the size of the gap will be described.

In one example, the gap structure unit 1000 includes a base plate made of a substrate or a film, a spacer elastic pattern (not shown) positioned between the top edge of the second electrode E2 located on the base plate and the back edge of the bottom structure 1100, And the like.

In accordance with the touch force, the upper cover 1240, the display panel 110, and the lower structure 1100 and the like receive the force downward.

Accordingly, the gap G between the base plates can be changed while the lower structure 1100 is bent downward.

As another example, the gap structure unit 1000 may include a base plate made of a substrate or a film, and an elastic sheet or the like positioned between the upper surface of the second electrode E2 positioned on the base plate and the back surface of the lower structure 1100 May be implemented.

In accordance with the touch force, the upper cover 1240, the display panel 110, and the lower structure 1100 and the like receive the force downward.

Accordingly, the gap G between the base plates can be changed while the substructure 1100 is bent.

As another example, the gap structure unit 1000 may include an upper film positioned on the back surface of the lower structure 1100, a lower film facing the upper film, a bonding film bonded to the upper surface of the lower film, A spacer located on the upper surface of the second electrode E2, and the like.

The second electrode E2 may be positioned in an inner space provided between the rear edge portion of the upper film and the upper edge portion of the lower film.

In accordance with the touch force, the upper cover 1240, the display panel 110, and the lower structure 1100 and the like receive the force downward.

Accordingly, the size of the gap G between the upper surface of the second electrode E2 and the back surface of the upper film can be changed.

As another example, the gap structure unit 1000 may be implemented with an elastic film or the like positioned between the upper surface of the second electrode E2 and the rear surface of the lower structure 1100. [

In accordance with the touch force, the upper cover 1240, the display panel 110, and the lower structure 1100 and the like receive the force downward.

Accordingly, the thickness of the elastic film may change, and the size of the gap G between the upper surface of the second electrode E2 and the rear surface of the lower structure 1100 may be changed.

As another example, the gap structure unit 1000 may be implemented including an internal pattern or the like embedded in the substructure 1100.

In accordance with the touch force, the upper cover 1240, the display panel 110, and the lower structure 1100 and the like receive the force downward.

The internal pattern of the lower structure 1100 is also subjected to a force so that the gap G between the upper surface of the second electrode E2 located at the lower portion of the lower structure 1100 and the internal pattern May vary in size.

FIG. 14 is a view showing a display module DM and a frame structure FS of the touch display device 100 according to the present embodiments.

Hereinafter, it is assumed that the touch display device 100 according to the present embodiments is a liquid crystal display device. It is also assumed that the lower structure 1100 of the display panel 110 in the touch display device 100 according to the present embodiments is the backlight unit 1400.

14, the touch display device 100 according to the present embodiment includes a display module DM including a display panel 110 in which a plurality of data lines DL and a plurality of gate lines GL are disposed, , A frame structure (FS) located under the display module DM, and the like.

14, the display module DM includes a display panel 110, an upper cover 1240 bonded to the upper surface of the display panel 110 through a bonding layer 1230, And a backlight unit 1400 located at the bottom.

In addition, a reflective sheet 1405 may exist under the backlight unit 1400 for light efficiency.

The display module DM is also referred to as a liquid crystal display module (LCM).

Referring to FIG. 14, the frame structure FS located under the display module DM may include a first mid-frame 1410, a second mid-frame 1420, and the like.

When the touch display device 100 according to the present embodiment is a mobile device, the frame structure FS may further include a battery cover 1430 or the like positioned under the second mid-frame 1420 .

The first mid-frame 1410 includes an elastic plate 1412 located under the display module DM, a conductive plate 1413 located under the elastic plate 1412, an elastic plate 1412, An outer frame 1411 located outside the plate 1413, and the like.

The elastic plate 1412, for example, may be made of a material such as polyurethane.

The conductive plate 1413 may be made of a conductive material such as magnesium, for example.

This conductive plate 1413 can serve as a shield for shielding noise generated from the second mid-frame 1420 or generated from the second mid-frame 1420, serving as an electric ground, and the like.

Hereinafter, the position of the second electrode E2 serving as a force sensor together with the first electrode E1 will be described with reference to FIGS. 15A, 15B, 16A, 16B, 16C and 17 I will explain it as an enemy.

FIGS. 15A, 15B, 16A, 16B, and 16C are cross-sectional views of the touch display device 100 according to the present embodiments. In the case where the second electrode E2 is present inside the display module DM Respectively.

Referring to FIGS. 15A and 15B, the second electrode E2 may be formed to be inserted into the display module DM.

Referring to FIG. 15A, the conductive sheet 1500 may be inserted into the backlight unit 1400 included in the display module DM.

The conductive sheet 1500 inserted into the backlight unit 1400 may correspond to the second electrode E2.

Referring to FIG. 15B, a reflective sheet 1405 made of a conductive material may be disposed on the back surface of the backlight unit 1400 included in the display module DM.

The reflective sheet 1405 disposed on the back surface of the backlight unit 1400 may correspond to the second electrode E2.

16A, 16B and 16C, the second electrode E2 may be implemented in a form attached to the display module DM.

Referring to FIG. 16A, a cover bottom 1610 made of a conductive material may be disposed under the display module DM.

A cover bottom 1610 located under the display module DM may correspond to the second electrode E2.

Referring to FIG. 16B, a film 1620 may be attached to the rear surface of the display module DM. A conductive film 1630 may be coated on the rear surface of the film 1620.

The conductive film 1630 coated on the back surface of the film 1620 may correspond to the second electrode E2.

Referring to FIG. 16C, a plate 1640 coated with a conductive film 1630 may be disposed under the display module DM.

A conductive film 1630 coated on the top of the plate 1640 may be attached to the back of the display module DM.

The conductive film 1630 coated on the top of the plate 1640 may correspond to the second electrode E2.

FIG. 17 is a cross-sectional view of a touch display device 100 according to the present embodiment, in which the second electrode E2 is present outside the display module DM.

Referring to FIG. 17, a second electrode E2 may exist outside the display module DM.

17, the touch display device 100 according to the present exemplary embodiment includes a force sensor for sensing a touch force applied to an upper portion of a display panel 110 during a driving period, (E1) and at least one second electrode (E2), which are driven as a plurality of first electrodes (E1).

Here, the plurality of first electrodes E1 are embedded in the display panel 110.

The second electrode E2 may be included in the frame structure FS located outside the display module DM, for example.

As described above, when the second electrode E2 is implemented by utilizing the frame structure FS located outside the display module DM, the first electrode E1 and the second electrode E2 are formed when the display module DM is manufactured. It is necessary to make all of the two electrodes E2. The frame structure FS including the display electrode DM having the first electrode E1 embedded therein and the second electrode E2 is assembled at the time of assembling the touch display device 100, .

FIG. 18 is a diagram more specifically showing the display module DM and the frame structure FS of the touch display device 100 according to the present embodiments.

18, the display module DM includes a first flexible printed circuit 1810 electrically connected to the display panel 110, a first flexible printed circuit 1810 connected to the display panel 110, A second flexible printed circuit 1820 for electrical connection between the light units 1400, and the like.

In Fig. 18, the first flexible printed circuit 1810 and the second flexible printed circuit 1820 are separate flexible printed circuits (FPCs), but they may be integrated into one.

18, the frame structure FS located under the display module DM may include a first mid-frame 1410, a second mid-frame 1420, and the like have.

The frame structure FS may further include a battery cover 1430 or the like positioned under the second mid-frame 1420 when the touch display device 100 according to the present embodiments is a mobile device.

The first mid-frame 1410 includes an elastic plate 1412 located under the display module DM, a conductive plate 1413 located under the elastic plate 1412, an elastic plate 1412, An outer frame 1411 located outside the plate 1413, and the like.

The elastic plate 1412, for example, may be made of a material such as polyurethane.

The conductive plate 1413, for example, may be made of a conductive material such as magnesium.

This conductive plate 1413 can serve as a shield for shielding noise generated from the second mid-frame 1420 or generated from the second mid-frame 1420, serving as an electric ground, and the like.

A main board 1810 may be present in the second mid-frame 1420.

The main board 1830 is provided with a micro control unit 1850 for performing a signal generating function, a control function, an arithmetic function and the like, and has signal wiring for signal transmission, Lt; RTI ID = 0.0 > 1840 < / RTI >

In the following, when the second electrode E2 is present inside the display module DM (including both the built-in structure and the attached structure) as shown in Figs. 15A, 15B, 16A, 16B, The transfer paths of the two drive signals DS1 and DS2 will be described with reference to Figs. 19 to 27. Fig.

Next, when the second electrode E2 is present outside the display module DM as shown in Fig. 17, the propagation paths of the two driving signals DS1 and DS2 are shown in Figs. 30 will be described.

19 to 30 may be included in the touch circuit 120. In the touch circuit 120,

FIG. 19 is a diagram illustrating a case where the second electrode E2 is present inside the display module DM in the touch display device 100 according to the present embodiment. The second electrode driving signal DS2 of FIG.

19, when the second electrode E2 is present inside the display module DM (including both the built-in structure and the attached structure) as shown in FIGS. 15A, 15B, 16A, 16B and 16C, The first electrode driving signal DS1 is transmitted to the driving chip 1130 through the first flexible printed circuit FPC 1 and 1810 and the first electrode driving signal DS1 is applied to the first electrode E1 from the driving chip 1130, The driving signal DS1 is transmitted.

Here, the first electrode driving signal DS1 is generated in a micro control unit 1850 mounted on a main board 1810 of a second mid-frame 1420, for example, To the first flexible printed circuit (FPC 1, 1810).

As another example, the first electrode driving signal DS1 may be generated in a signal generator (not shown) other than the micro control unit 1850 and input to the first flexible printed circuit (FPC 1, 1810).

19, when the second electrode E2 is present inside the display module DM (including both the built-in structure and the attached structure) as shown in FIGS. 15A, 15B, 16A, 16B and 16C, , And the second electrode driving signal DS2 is transmitted to the second electrode E2 through the first flexible printed circuit (FPC1, 1810).

As shown in FIG. 19, there are four types of paths in which the second electrode driving signal DS2 is transmitted from the first flexible printed circuit (FPC 1, 1810) to the second electrode E2 have.

Case 1 is a case where the second electrode driving signal DS2 is directly transmitted from the first flexible printed circuit (FPC 1, 1810) to the second electrode E2.

Case 2 is a case where the second electrode driving signal DS2 is transmitted from the first flexible printed circuit FPC 1 or 1810 to the second electrode E2 through the auxiliary material Aid.

In Case 3, the second electrode driving signal DS2 is transferred from the first flexible printed circuit (FPC 1, 1810) to the second flexible printed circuit (FPC 2, 1820), and the second flexible printed circuit 2, 1820 to the second electrode E2.

In Case 4, the second electrode driving signal DS2 is transmitted from the first flexible printed circuit (FPC 1, 1810) to the second flexible printed circuit (FPC 2, 1820), and the second flexible printed circuit 2, 1820 to the second electrode E2 through the auxiliary member Aid.

The following four cases will be described in more detail with reference to FIGS. 20 to 27. FIG.

FIGS. 20 and 21 are diagrams showing a second electrode driving signal DS2 transmission path corresponding to Case 1.

20 and 21, Case 1 is a case where the second electrode driving signal DS2 is directly transmitted from the first flexible printed circuit 1810 to the second electrode E2.

In this case, a connection line DW for signal transmission between the first flexible printed circuit 1810 and the second electrode E2 is connected between the first flexible printed circuit 1810 and the second electrode E2 .

20 and 21, during the driving period for sensing the touch force applied to the upper portion of the display panel 110, the first flexible printed circuit 1810 is connected to the display panel 110 The first electrode driving signal DS1 is applied to at least one of the plurality of built-in first electrodes E1 and the first electrode driving signal DS1 is applied to the second electrode E2 through the connection line DW in the first flexible printed circuit 1810. [ The two-electrode driving signal DS2 may be applied.

As described above, the first flexible printed circuit 1810 configured to supply various signals (data and control signals for image display) to the display panel 110 is referred to as a first electrode drive signal DS1 and a second electrode drive signal DS2, It is possible to transfer the drive signal without further arranging the drive signal transfer wiring for the touch force sensing by utilizing it as the transfer path of the electrode drive signal DS2.

Referring to FIG. 20, the signal generator 2000 may generate a first electrode driving signal DS1 and a second electrode driving signal DS2, and output the generated signal to the first flexible printed circuit 1810. FIG.

The first electrode driving signal DS1 and the second electrode driving signal DS2 are supplied to the driving chip 1130 and the connection line DW through other signal lines existing in the first flexible printed circuit 1810, Respectively.

Referring to FIG. 21, the signal generating unit 2000 may generate only the first electrode driving signal DS1 and output it to the first flexible printed circuit 1810. FIG.

The first electrode driving signal DS1 input to the first flexible printed circuit 1810 is input to the driving chip 1130 connected to the first flexible printed circuit 1810 and is supplied to the first electrode E2, Lt; / RTI >

21, the first electrode driving signal DS1 input to the first flexible printed circuit 1810 can be converted from the signal converter S / C to the second electrode driving signal DS2 .

The second electrode driving signal DS2 output from the signal converter S / C may be transmitted to the second electrode E2 through the connection line DW.

In Figs. 20 and 21, the first electrode driving signal DS1 and the second electrode driving signal DS2 are shown as pulse-like signals having a positive phase relationship. The first electrode driving signal DS1 and the second electrode driving signal DS2 may be in various forms as shown in FIG.

Accordingly, the signal converter S / C converts the voltage level of the first electrode driving signal DS1, converts the phase, converts the DC voltage to the AC voltage, or converts the AC voltage to the DC voltage The second electrode driving signal DS2 can be generated and output.

FIGS. 22 and 23 are diagrams showing a second electrode driving signal DS2 transmission path corresponding to Case 2. FIG.

22 and 23, Case 2 is a case where the second electrode driving signal DS2 is transmitted from the first flexible printed circuit 1810 to the second electrode E2 through the auxiliary material Aid.

Referring to Figs. 22 and 23, the first flexible printed circuit 1810 is connected to the auxiliary component CT via a connection line DW. The auxiliary material CT electrically connects the connection line DW and the second electrode E2.

The auxiliary material CT may be a conductive tape having an outer rim shape of the second electrode E2 and attached to the outer rim of the second electrode E2.

The second electrode driving signal DS2 is transferred from the first flexible printed circuit 1810 to the auxiliary CT through the connection line DW and again to the second electrode E2 through the auxiliary CT Lt; / RTI >

22, the signal generating unit 2000 may generate the first electrode driving signal DS1 and the second electrode driving signal DS2 and output the generated signal to the first flexible printed circuit 1810. FIG.

The first electrode driving signal DS1 and the second electrode driving signal DS2 are supplied to the driving chip 1130 and the connection line DW through other signal lines existing in the first flexible printed circuit 1810, Respectively.

The second electrode driving signal DS2 input to the connection line DW may be transmitted to the second electrode E2 through the auxiliary material CT.

Referring to FIG. 23, the signal generator 2000 may generate only the first electrode driving signal DS1 and output it to the first flexible printed circuit 1810. FIG.

The first electrode driving signal DS1 input to the first flexible printed circuit 1810 is input to the driving chip 1130 connected to the first flexible printed circuit 1810 and is supplied to the first electrode E2, Lt; / RTI >

23, the first electrode driving signal DS1 input to the first flexible printed circuit 1810 may be converted from the signal converter S / C to the second electrode driving signal DS2 .

The second electrode driving signal DS2 output from the signal converter S / C may be transmitted to the second electrode E2 through the connection line DW and the auxiliary CT.

In Figs. 22 and 23, the first electrode driving signal DS1 and the second electrode driving signal DS2 are shown as a pulse-like signal having a positive phase relationship. The first electrode driving signal DS1 and the second electrode driving signal DS2 may be in various forms as shown in FIG.

Accordingly, the signal converter S / C converts the voltage level of the first electrode driving signal DS1, converts the phase, converts the DC voltage to the AC voltage, or converts the AC voltage to the DC voltage The second electrode driving signal DS2 can be generated and output. Such a signal converter (S / C) can be implemented, for example, as a level shifter.

FIGS. 24 and 25 are diagrams showing a second electrode driving signal DS2 transmission path corresponding to Case 3. FIG.

Referring to FIGS. 24 and 25, in Case 3, the second electrode driving signal DS2 is transmitted from the first flexible printed circuit 1810 to the second flexible printed circuit 1820, Is directly transmitted from the circuit 1820 to the second electrode E2.

Referring to Figs. 24 and 25, the first flexible printed circuit 1810 and the second flexible printed circuit 1820 are electrically connected.

Then, the second flexible printed circuit 1820 is electrically connected to the second electrode E2 through the connection line DW.

Referring to FIG. 24, the signal generator 2000 may generate the first electrode driving signal DS1 and the second electrode driving signal DS2 and output the generated signal to the first flexible printed circuit 1810. FIG.

Accordingly, the first electrode driving signal DS1 and the second electrode driving signal DS2 are supplied to the driving chip 1130 and the second flexible printed circuit 1810 through other signal lines existing in the first flexible printed circuit 1810, Circuit 1820, respectively.

The second electrode driving signal DS2 input to the second flexible printed circuit 1820 may be transmitted to the second electrode E2 through the connection line DW.

Referring to FIG. 25, the signal generator 2000 may generate only the first electrode driving signal DS1 and output it to the first flexible printed circuit 1810. FIG.

The first electrode driving signal DS1 input to the first flexible printed circuit 1810 is input to the driving chip 1130 connected to the first flexible printed circuit 1810 and is supplied to the first electrode E2, Lt; / RTI >

25, the first electrode driving signal DS1 input to the first flexible printed circuit 1810 may be converted from the signal converter S / C to the second electrode driving signal DS2 .

The second electrode driving signal DS2 output from the signal converter S / C is transmitted to the second flexible printed circuit 1820 and then transmitted to the second electrode E2 through the connection line DW .

In Figs. 24 and 25, the first electrode driving signal DS1 and the second electrode driving signal DS2 are shown as pulse-like signals having a positive phase relationship. The first electrode driving signal DS1 and the second electrode driving signal DS2 may be in various forms as shown in FIG.

Accordingly, the signal converter S / C converts the voltage level of the first electrode driving signal DS1, converts the phase, converts the DC voltage to the AC voltage, or converts the AC voltage to the DC voltage The second electrode driving signal DS2 can be generated and output.

FIGS. 26 and 27 are diagrams showing a second electrode driving signal DS2 transmission path corresponding to Case 4.

26 and 27, in Case 4, the second electrode driving signal DS2 is transmitted from the first flexible printed circuit 1810 to the second flexible printed circuit (FPC 2, 1820) And is transmitted from the flexible printed circuit 1820 to the second electrode E2 through the auxiliary material Aid.

Referring to Figs. 26 and 27, the first flexible printed circuit 1810 and the second flexible printed circuit 1820 are electrically connected.

The second flexible printed circuit 1820 is connected to the auxiliary component CT via the connection line DW.

The auxiliary material CT electrically connects the connection line DW and the second electrode E2.

Referring to FIG. 26, the signal generating unit 2000 may generate the first electrode driving signal DS1 and the second electrode driving signal DS2 and output the generated signal to the first flexible printed circuit 1810. FIG.

Accordingly, the first electrode driving signal DS1 and the second electrode driving signal DS2 are supplied to the driving chip 1130 and the second flexible printed circuit 1810 through other signal lines existing in the first flexible printed circuit 1810, Circuit 1820, respectively.

The second electrode driving signal DS2 input to the second flexible printed circuit 1820 may be transmitted to the second electrode E2 through the connection line DW and the high auxiliary voltage CT.

Referring to FIG. 27, the signal generator 2000 may generate only the first electrode driving signal DS1 and output the generated signal to the first flexible printed circuit 1810. FIG.

The first electrode driving signal DS1 input to the first flexible printed circuit 1810 is input to the driving chip 1130 connected to the first flexible printed circuit 1810 and is supplied to the first electrode E2, Lt; / RTI >

27, the first electrode driving signal DS1 input to the first flexible printed circuit 1810 may be converted from the signal converter S / C to the second electrode driving signal DS2 .

The second electrode driving signal DS2 output from the signal converter S / C is transmitted to the second flexible printed circuit 1820 and is again transmitted through the connection line DW and the high auxiliary voltage CT to the second electrode E2.

In Figs. 26 and 27, the first electrode driving signal DS1 and the second electrode driving signal DS2 are shown as pulse-like signals having a positive phase relationship. The first electrode driving signal DS1 and the second electrode driving signal DS2 may be in various forms as shown in FIG.

Accordingly, the signal converter S / C converts the voltage level of the first electrode driving signal DS1, converts the phase, converts the DC voltage to the AC voltage, or converts the AC voltage to the DC voltage The second electrode driving signal DS2 can be generated and output.

28 is a diagram illustrating a case where the second electrode E2 is present outside the display module DM in the touch display device 100 according to the present embodiment. The second electrode driving signal DS2 of FIG.

Referring to FIG. 28, when the second electrode E2 is present outside the display module DM as shown in FIG. 17, the first electrode driving signal DS1 drives the second mid-frame MF 2 and 1420 To the first flexible printed circuit (FPC 1, 1810) and then to the drive chip (1130). Then, the first electrode driving signal DS1 is transferred from the driving chip 1130 to the corresponding first electrode E1.

Here, the first electrode driving signal DS1 is generated in a micro control unit 1850 mounted on a main board 1810 of a second mid-frame 1420, for example, To the first flexible printed circuit (FPC 1, 1810).

Referring to FIG. 28, when the second electrode E2 is present outside the display module DM as shown in FIG. 17, the second electrode driving signal DS2 is supplied from the second mid- (E2).

As shown in FIG. 28, there may be two types of paths through which the second electrode driving signal DS2 is transmitted from the second mid-frame 1420 to the second electrode E2.

Case A shows that the second electrode driving signal DS2 is transferred from the second mid-frame 1420 to the first flexible printed circuit FPC 1 and 1810 and the second electrode driving signal DS2 is transferred from the second flexible printed circuit 1810 to the second flexible printed circuit And is transmitted to the electrode E2.

Case B is a case where the second electrode driving signal DS2 is transmitted from the second mid-frame 1420 to the second electrode E2.

FIG. 29 shows a second electrode driving signal DS2 transmission path corresponding to Case A, and FIG. 30 illustrates a second electrode driving signal DS2 corresponding to Case B. FIG.

29 and 30, the frame structure FS includes a first mid-frame 1410 including a second electrode E2, a micro control unit (not shown) for generating a first electrode driving signal DS1 And a second mid-frame 1420 including a main board 1830 on which the main board 1830 is mounted.

In some cases, the frame structure FS may further include a battery cover 1430 and the like.

According to the above description, a function of generating a first electrode driving signal DS1 required for driving to sense a touch position or sensing a touch force, having a structure including a second electrode E2 serving as a force sensor It is possible to provide the frame structure FS having the frame structure FS.

14 and 14, the first mid-frame 1410 includes an elastic plate 1412 located under the display module DM and a second elastic plate 1412 positioned under the elastic plate 1412 And an outer frame 1411 located at the periphery of the elastic plate 1412 and the conductive plate 1413 and the like.

The elastic plate 1412, for example, may be made of a material such as polyurethane.

The conductive plate 1413, for example, may be made of a conductive material such as magnesium.

Accordingly, the conductive plate 1413 may correspond to the second electrode E2 serving as a force sensor to which the second electrode driving signal DS2 is applied.

This conductive plate 1413 can serve as a shield for shielding noise generated from the second mid-frame 1420 or generated from the second mid-frame 1420, serving as an electric ground, and the like.

As described above, by using the conductive plate 1413 constituting the first mid-frame 1410 as the second electrode E2, it is possible to provide a frame structure FS serving as a force sensor.

Referring to FIGS. 29 and 30, the touch display device 100 according to the present embodiments may further include a first flexible printed circuit 1810 electrically connected to the display panel 110.

29 and 30, the main board 1830 of the second mid-frame 1420 may be provided with a connector 1840 for electrical connection with the first flexible printed circuit 1810 .

The first electrode driving signal DS1 generated in the micro control unit 1850 mounted on the main board 1830 of the second mid-frame 1420 is supplied to the main board 1830 through the connector 1840 provided in the main board 1830 May be transferred to the first flexible printed circuit 1810 and input to the display panel 110.

Therefore, when the first electrode driving signal DS1 is generated in the micro control unit 1850 mounted on the main board 1830 of the second mid-frame 1420, the first electrode driving signal DS1 generated in the frame structure FS The electrode driving signal DS1 can be effectively transmitted to the display module DM outside the frame structure FS.

29, the second electrode driving signal DS2 is transferred from the second mid-frame 1420 to the first flexible printed circuit FPC 1, 1810, and the first flexible printed circuit 1810 In case A, which is transmitted to the second electrode E2, the touch display device 100 according to the present embodiment is configured to apply the first electrode driving signal DS1, which is transmitted to the first flexible printed circuit 1810, And a signal converter (S / C) for converting the two-electrode drive signal DS2 into a two-electrode drive signal DS2.

The second electrode driving signal DS2 converted and outputted from the signal converter S / C may be applied to the conductive plate 1413 of the first mid-frame 1410. [

As described above, when the signal converter S / C is used as a generation configuration of the second electrode driving signal DS2, since the micro control unit 1850 can generate only the first electrode driving signal DS1, The burden of generating the driving signal of the control unit 1850 can be reduced.

29, the touch display device 100 according to the present embodiment includes a connection (not shown) for electrically connecting the first flexible printed circuit 1810 and the conductive plate 1413 of the first mid- And may further include a line DW.

The signal converter S / C may be located in the first flexible printed circuit 1810 or the first mid-frame 1410.

If the signal converter S / C is located in the first flexible printed circuit 1810, the first flexible printed circuit 1810 outputs the first electrode drive signal DS1 to the second electrode drive signal < RTI ID = 0.0 > DS2 and the connection line DW may transmit the second electrode driving signal DS2 to the conductive plate 1413 of the first mid-frame 1410 corresponding to the second electrode E2.

If the signal converter S / C is located in the first mid-frame 1410,

The connection line DW transfers the first electrode driving signal DS1 to the first mid-frame 1410 and then the first electrode driving signal DS1 in the first mid- May be converted into a driving signal DS2 and transmitted to the conductive plate 1413 of the first mid-frame 1410 corresponding to the second electrode E2.

According to the above description, the first electrode driving signal DS1 generated in the second mid-frame 1420 and transferred to the first flexible printed circuit 1810 is converted into the second electrode driving signal DS2, Frame 1410 of the first mid-frame 1410 corresponding to the second electrode E2.

Referring to FIG. 30, in Case B in which the second electrode driving signal DS2 is transmitted from the second mid-frame 1420 to the second electrode E2, the touch display device 100 according to the present embodiment, (S / C) for converting the first electrode driving signal DS1 into a second electrode driving signal DS2 and outputting the second electrode driving signal DS2.

The first electrode driving signal DS1 generated in the micro control unit 1850 mounted on the main board 1830 is supplied to the first flexible printed circuit 1840 through the connector 1840 provided in the main board 1830 1810, and at the same time, to the signal converter (S / C).

The first electrode driving signal DS1 transferred to the signal converter S / C may be converted into a second electrode driving signal DS2 by the signal converter S / C and output.

The second electrode driving signal DS2 output from the signal converter S / C may be applied to the conductive plate 1413 of the first mid-frame 1410. [

The second electrode driving signal DS2 converted from the first electrode driving signal DS1 generated in the frame structure FS is transmitted through the display module DM outside the frame structure FS And is directly applied to the second electrode E2 existing inside the frame structure FS, whereby the signal transmission length can be reduced.

30, the touch display device 100 according to the present embodiment includes a connector 1840 provided on the main board 1830, a first mid-frame 1410 corresponding to the second electrode E2, And a connection line DW for electrically connecting the conductive plate 1413 of the first conductive type.

In this case, the signal converter S / C may be located on the main board 1830 or the first mid-frame 1410.

If the signal converter S / C is located on the main board 1830, the first electrode driving signal (S / C) generated in the micro control unit 1850 on the main board 1830 of the second mid- DS1 is converted from the main board 1830 to the second electrode driving signal DS2 and the connection line DW is supplied with the second electrode driving signal DS2 to the first mid- To the conductive plate (1413) of the display panel (1410).

If the signal converter S / C is located in the first mid-frame 1410, the first electrode 1410 generated in the micro control unit 1850 on the main board 1830 of the second mid- The driving signal DS1 is transmitted to the first mid-frame 1410 via the connection line DW.

The first electrode driving signal DS1 transmitted to the first mid-frame 1410 is converted into a second electrode driving signal DS2 by a signal converter S / C located in the first mid- And may be transmitted to the conductive plate 1413 of the first mid-frame 1410 corresponding to the second electrode E2.

The second electrode driving signal DS2 converted from the first electrode driving signal DS1 generated in the frame structure FS is transmitted through the display module DM outside the frame structure FS And can be effectively transferred to the second electrode E2 existing inside the frame structure FS.

According to the embodiments described above, in order to provide various functions in various forms, not only the touch coordinates are sensed at the time of user's touch, but also the touch force, The touch display device 100 can be provided.

In addition, according to the present embodiments, a touch display device 100 having a structure capable of sensing a touch force utilizing an existing structure can be provided.

In addition, according to the present embodiments, a touch display device 100 is provided in which a first electrode and a second electrode as force sensors for sensing a touch force are included in a display module DM and a frame structure FS, respectively can do.

In addition, according to the embodiments, a frame structure FS serving as a force sensor for sensing a touch force can be provided.

In addition, according to the embodiments, two force sensors necessary for sensing the touch force are distributedly disposed in the display module DM and the frame structure FS, thereby effectively providing a force sensing structure.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. , Separation, substitution, and alteration of the invention will be apparent to those skilled in the art. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: Touch display device
110: Display panel
120: touch circuit
E1: first electrode
E2: Second electrode

Claims (14)

In a touch display device,
A display module including a display panel in which a plurality of data lines and a plurality of gate lines are disposed; And
And a frame structure disposed under the display module,
Further comprising a plurality of first electrodes and at least one second electrode driven as a force sensor during a driving period for sensing a touch force applied to an upper portion of the display panel,
Wherein the plurality of first electrodes are embedded in the display panel,
Wherein the second electrode is included in the frame structure. The method according to claim 1,
The frame structure includes:
A first mid-frame including the second electrode; And
And a second mid-frame including a main board on which a micro control unit for generating a first electrode driving signal is mounted. 3. The method of claim 2,
The first mid-
An elastic plate positioned under the display module;
A conductive plate positioned under the elastic plate; And
And an outer frame located at an outer periphery of the elastic plate and the conductive plate,
And the conductive plate corresponds to the second electrode to which the second electrode driving signal is applied. The method of claim 3,
And a first flexible printed circuit electrically connected to the display panel,
Wherein the main board is provided with a connector for electrical connection with the first flexible printed circuit,
Wherein the first electrode driving signal generated in the micro control unit mounted on the main board,
And the first flexible printed circuit is connected to the main board via the connector, and is input to the display panel. 5. The method of claim 4,
Further comprising a signal converter for converting the first electrode driving signal transferred to the first flexible printed circuit into the second electrode driving signal and outputting the second electrode driving signal,
Wherein the second electrode driving signal output from the signal converter includes:
Wherein the conductive plate of the first midframe is applied to the conductive plate of the first midframe. 6. The method of claim 5,
Further comprising a connection line for electrically connecting the first flexible printed circuit and the conductive plate,
Wherein the signal converter is located in the first flexible printed circuit,
Wherein the connection line transfers the second electrode driving signal converted from the first electrode driving signal to the conductive plate by the signal converter. 5. The method of claim 4,
And a signal converter converting the first electrode driving signal into the second electrode driving signal and outputting the second electrode driving signal,
Wherein the first electrode driving signal generated in the micro control unit mounted on the main board,
The first flexible printed circuit is connected to the main board via the connector and is also transmitted to the signal converter,
The first electrode driving signal transmitted to the signal converter is converted into the second electrode driving signal by the signal converter,
Wherein the second electrode driving signal output from the signal converter includes:
Wherein the conductive plate of the first midframe is applied to the conductive plate of the first midframe. 8. The method of claim 7,
Further comprising a connection line for electrically connecting the main board and the conductive plate,
Wherein the signal converter is located on the main board,
Wherein the connection line transfers the second electrode driving signal converted from the first electrode driving signal to the conductive plate by the signal converter. The method according to claim 1,
The first and second electrode driving signals and the second electrode driving signals, which are applied to the first electrode and the second electrode during the driving period,
Wherein the signal is a pulse-shaped signal or a signal having a DC voltage. 10. The method of claim 9,
When both the first electrode driving signal and the second electrode driving signal are pulse-shaped signals,
Wherein the second electrode driving signal and the first electrode driving signal are in a positive phase relationship or an inverse phase relation. 11. The method of claim 10,
When the second electrode driving signal and the first electrode driving signal have a positive phase relationship,
Wherein the second electrode driving signal has a greater signal intensity than the first electrode driving signal. The method according to claim 1,
Wherein at least a gap capable of changing the size according to the touch force is present between the plurality of first electrodes and the second electrode. A frame structure located under a display module including a display panel,
An elastic plate positioned under the display module;
A conductive plate positioned under the elastic plate; And
And an outer frame located at an outer periphery of the elastic plate and the conductive plate,
The conductive plate may include:
Wherein a driving signal is applied during a driving period for sensing a touch force applied to an upper portion of the display panel. In a touch display device,
A display panel in which a plurality of data lines and a plurality of gate lines are arranged; And
And a flexible printed circuit electrically connected to the display panel,
Further comprising: a plurality of first electrodes embedded in the display panel; and at least one second electrode located outside the display panel,
During a driving period for sensing a touch force applied to an upper portion of the display panel,
The first electrode driving signal is applied to at least one of the plurality of first electrodes built in the display panel through the flexible printed circuit,
And the second electrode driving signal is applied to the second electrode in the flexible printed circuit.

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