KR20200077807A - Touch Sensor Module and Touch Display Device having the same - Google Patents

Abstract

Provided are a touch sensor module capable of preventing damage to a pad part when external force is applied to a panel by having a protective pattern that protects the pad part inside the touch sensor module disposed in an outer area of a rear surface of a display panel and a touch display device including the same. The touch sensor module comprises a first printed circuit substrate, a second printed circuit substrate, a plurality of pad parts, and a protective pattern.

Description

Touch sensor module and touch display device including the same

The present invention relates to a touch sensor module and a touch display device including the same, and relates to a touch sensor module capable of sensing a user's touch and a touch display device including the same.

As the information society develops, the demand for display devices for displaying images is increasing in various forms, and various types of display devices such as liquid crystal display devices, plasma display devices, and organic light emitting display devices are being utilized.

In addition, among display devices, mobile devices such as smart phones and tablets, and medium and large devices such as smart televisions provide touch-type input processing according to user convenience and device characteristics.

A touch display device capable of such touch input processing has been developed to sense a user's touch and provide various functions through this, and user needs are also diversified.

However, since the touch sensor module receiving the touch signal is vulnerable to shock, a problem has been pointed out for damage such as disconnection of some elements in the touch sensor module.

The present invention is to solve such a problem, and more particularly, to provide a touch sensor module and a touch display device including the same, which can prevent the touch sensor module from being damaged by external force in the display device. have.

In order to solve this problem, the present invention is provided with a protective pattern to protect the pad portion inside the touch sensor module disposed in the outer area on the rear side of the display panel to prevent the pad portion from being damaged while external force is applied to the panel. Provided is a sensor module and a touch display device including the same.

According to the touch sensor module of the present invention and a touch display device including the same,

First, it is possible to maintain the bonding state of the pad portion soldered between the first printed circuit board and the second printed circuit board more firmly,

Second, even if an external force is applied to the touch sensor module, the protection pattern disposed in the outer area of the pad portion absorbs shock to prevent the pad portion from being damaged,

Third, since an external structure of the touch sensor module does not require a structure such as a shield case protecting them separately, assembly time can be shortened and costs can be reduced.

Fourth, since it is possible to prevent damage to the touch sensor module, there is an effect of providing the sensing of the coordinates by the user's touch and the sensing of the touch force pressing the screen when touched semi-permanently.

1 is a perspective view illustrating a state in which a touch sensor module is separated on a rear surface of a touch display device according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a cross section of the touch sensor module shown in FIG. 1.
FIG. 3 is a perspective view showing a mesh portion of the touch sensor module shown in FIG. 1.
4 is a perspective view showing a mesh portion of a touch sensor module according to a second embodiment of the present invention.
5 to 7 are reference diagrams showing a state in which a protection pattern is arranged in a pattern of various shapes inside the touch sensor module of the present invention.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described to be easily carried out by those of ordinary skill in the art. It should be noted that, in the accompanying drawings, the same reference numbers are used when designating the same configuration in other drawings. In addition, in the description of the present invention, when it is determined that a detailed description of a related known function or known configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, certain features shown in the drawings are enlarged or reduced or simplified for ease of description, and the drawings and their components are not necessarily drawn to scale. However, those skilled in the art will readily understand these details.

1 is a perspective view showing a state in which a touch sensor module is separated on a rear surface of a touch display device according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view showing one cross section of the touch sensor module shown in FIG. 1.

1 and 2, the touch display device 10 provided with the touch sensor module 100 according to the first embodiment of the present invention has the touch sensor module 100 disposed on the rear surface of the display panel 20. do.

At this time, the touch display device may operate in a display mode for realizing an image or a touch mode for sensing a user's touch.

First, in the display mode, the display panel 20 displays an image through a pixel array in which sub-pixels are arranged in a matrix form. The basic pixel may be composed of at least three sub-pixels capable of expressing white by color mixing among white (W), red (R), green (G), and blue (B) sub-pixels. For example, the basic pixel is an R/G/B combination subpixel, a W/R/G combination subpixel, a B/W/R combination subpixel, and a G/B/W combination subpixel. Or W/R/G/B combination sub-pixels.

In addition, a power supply unit is provided to generate and output various driving voltages required by the timing controller, the gate driver, the data driver, the display panel 20, and the like, using the input voltage. For example, the power supply unit includes a driving voltage of a digital circuit supplied to a data driver and a timing controller, a driving voltage of an analog circuit supplied to a data driver, and a gate-on voltage (gate high voltage) and a gate-off voltage used in the gate driver. (Gate low voltage) and the like are generated and supplied. The power supply unit generates a plurality of driving voltages (EVDD, EVSS) and reference voltages required for driving the display panel 20 and supplies them to the display panel 20 through a data driver.

The timing controller receives image data and basic timing control signals from an external system. The system may be any one of a system of a portable terminal such as a computer, a TV system, a set top box, a tablet or a mobile phone. The basic timing control signals may include a dot clock, a data enable signal, a vertical synchronization signal, and a horizontal synchronization signal.

The timing controller uses the basic timing control signals received from the outside and timing setting information (start timing, pulse width, etc.) stored in the internal registers to control the data driver signals and gate drivers, respectively, and gate control data. Generate and supply signals.

In addition, when operating in a touch mode, a touch position sensing function is provided to sense whether a touch has occurred and a touch position on a touch generated by a pointer such as a user's finger, a body part, or a pen. 20) It provides a touch force sensing function that senses a touch force corresponding to a force (pressure) applied to it. The touch referred to herein refers to an action of a user touching the display panel 20 with a pointer.

Such a touch may be divided into a soft touch that touches with a force below a certain level, and a force touch that touches with a force above a certain level depending on the force pressing the display panel 20. The touch location according to the soft touch or the force touch refers to the location of the point where the user touches the display panel 20 and is also referred to as touch coordinates.

The pointer that touches the display panel 20 may be a body pointer such as a finger and a conductor pointer such as a pen having a contact portion as a conductor, or a non-conductor pointer such as a pen having a contact portion as a non-conductor. However, the pointer capable of sensing the touch position should be applied as a conductor pointer, and both the conductor and the non-conductive pointer can be applied to the pointer sensing the touch force.

When the touch operation is sensed, a touch signal is transmitted to the touch sensor module 100, and the touch sensor module 100 receives the touch signal and the force touch signal to perform control according to the touch operation.

As shown in FIG. 2, the touch sensor module 100 includes a first printed circuit board 110 and a second printed circuit board 120, and a pad unit 130 and a pad unit 130 electrically connected to each other between them. ) Includes a protection pattern 140 that protects the outer region. At this time, the touch sensor module 100 according to an embodiment of the present invention is a touch flexible printed circuit (hereinafter referred to as a touch FPC; flexible printed circuit) where the first printed circuit board 110 receives a touch signal, and the second printed circuit board ( 120) This is a Force Touch flexible printed circuit (hereafter Force Touch FPC) that receives a Force Touch signal. Of course, the first printed circuit board and the second printed circuit board may be applied to other circuit boards having a pad portion to be soldered therein and a protective pattern for protecting the periphery of the pad portion.

Referring to FIG. 2, the touch sensor module 100 has a pad pattern 130 between the first printed circuit board 110 and the second printed circuit board 120 and a protection pattern at the same height as the pad unit 130. 140 is provided.

The pad unit 130 includes a first solder 133 pad 131 provided on a rear surface of the first printed circuit board 110 and a second solder 144 provided on an upper surface of the second printed circuit board 120. It includes a pad 132 and a first solder 133 connecting the first solder 133 pad 131 and the second solder 144 pad 132. That is, the first solder 133 pad 131 and the second solder 144 pad 132 are integrally combined while the second solder 144 melts at a relatively low melting point and solidifies, and also electrically The connection is made.

At this time, the protection pattern 140 also includes a third solder pad 141, a fourth solder pad 142, and a mesh portion 150 provided between the third solder pad 141 and the fourth solder pad 142. And, while the second solder 144 is supplied between the third solder pad 141 and the fourth solder pad 142, the third solder pad 141 and the fourth solder pad 142 and the mesh portion 150 It is integrally combined. Accordingly, since the protection pattern 140 is also soldered at the same time as the pad portion 130 is soldered, the protection pattern 140 for protecting the pad portion 130 may be added without a separate additional process.

Here, the protection pattern 140 is disposed between the first printed circuit board 110 and the second printed circuit board 120 in a relatively outer area than the pad 130, and the touch display device 10 also includes a pad ( It is preferable to be disposed in the outer region rather than 130). Due to this, the protection pattern 140 primarily absorbs or blocks the external force from being transmitted from the outside of the touch display device 10 or the touch sensor module 100, thereby preventing the pad 130 from being damaged or damaged. It provides an effect.

FIG. 3 is a perspective view showing a mesh portion of the touch sensor module shown in FIG. 1.

Referring to FIG. 3, the mesh unit 150 includes a first frame 150a, a second frame 150b, and a connection frame 150c connecting them.

The first frame 150a is disposed along the periphery of the pad portion 130 in an area adjacent to the pad portion (see FIG. 1, 130 ). The second frame 150b is spaced apart from the first frame 150a by a predetermined distance and is arranged side by side. At this time, the connection frame 150c connects the first frame 150a and the second frame 150b, but is connected to have a set pattern.

Here, the set pattern of the connection frame 150c may be a honeycomb pattern connecting the honeycomb-shaped through holes 150d as shown in FIG. 3. Since the mesh part 150 of the honeycomb pattern is formed in a sheet shape, a hexagonal-shaped through hole is formed and is applied as a structure for absorbing shock because the incompressive strength is extremely high. In addition, by adjusting the interval between each through hole 150d of the connection frame 150c or the thickness or width of the first frame 150a and the second frame 150b, the mesh portion 150 adjusts the degree of stress corresponding to the external force. You can. Also, although not shown in the drawings, the thickness or width of the second frame 150b that is disposed outside the first frame 150a may be larger. Of course, in addition to the honeycomb pattern, it may be applied as a straight line pattern connecting the first frame to the second frame in a straight line, a diagonal pattern connecting the X-shape, or a circular pattern in which the appearance is deformed according to the impact.

The mesh portion 150 is made of a metal material that can be etched. More preferably, it is applied to stainless steel or phosphor bronze material to promote rigidity and heat resistance.

In addition, since the mesh portion 150 can block the transmission of an impact from the outside in the vicinity of the pad portion 130, the first printed circuit board 110 and the second printed circuit board 120 are prevented from being separated from the impact. There is an advantage that does not require the process of installing a separate structure.

4 is a perspective view showing a mesh portion of a touch sensor module according to a second embodiment of the present invention.

Referring to FIG. 4, a plurality of mesh parts 250 of the touch sensor module 200 according to the second embodiment of the present invention may be provided side by side on the outer side of the pad part 130.

When a plurality of mesh portions 250 are provided, the first frame 250a and the second frame 250b are increased to a plurality, respectively, in response to the one mesh portion 251 being soldered to prevent the transmission of external force, and corresponding to this Therefore, since the connection frame 250c and the through hole 250d are disposed, more shock absorbing layers are provided in the outer direction of the pad portion 130, thereby providing a more robust protection to the pad portion 130.

5 to 7 are reference diagrams showing a state in which a protection pattern is arranged in a pattern of various shapes inside the touch sensor module of the present invention.

The protection pattern 140 disposed inside the touch sensor module 100 of the present invention has a cross-section of "C", "I", "between the first printed circuit board 110 and the second printed circuit board 120. L", "W", "Z", "d" any one of the patterns may be provided to be connected to each other, or may be provided so that each pattern is at least partially spaced from each other.

First, referring to FIG. 5, the protection pattern 140a is arranged in a zigzag direction in a pattern of an approximately “d” shape in the outer region around the pad portion 130.

The mesh pattern 151 is disposed vertically or horizontally between the pad portion 130 and the external force, and the attachment area is wide. Therefore, the horizontal mesh portion 151 primarily absorbs external force or prevents the transmission of external force through deformation, and the vertical mesh portion 152 supports the horizontal mesh portion 151 to be structurally robust. Structure can be provided.

6, the protection pattern 140b is disposed to wrap around the pad portion 130 in an approximately “c” shape pattern. In addition, as a modification example of FIG. 6, a curved pattern having a “C” shape or a plurality of “I” shape patterns may be implemented to be arranged at right angles to each other.

Since the “C”-shaped pattern or “C”-shaped pattern is arranged to surround the pad portion 130, transmission of external force can be blocked regardless of the direction in which the external force is applied.

In FIG. 7, a plurality of protection patterns 140c are arranged in parallel with each other in an approximately “I”-shaped pattern in an outer region around the pad unit 130. In addition, although not shown in FIG. 7, the protection pattern adjacent to the pad portion 130 disposed at the vertex portion or the outermost area of the touch sensor module 100 that may be relatively vulnerable to external force may be disposed to have a denser density. Can. By controlling the size or density of the protection pattern 140c in this way, the pad 130 may be relatively protected from external force.

According to the touch sensor module of the present invention and a touch display device including the same, it is possible to maintain the bonding state of the pad portion soldered between the first printed circuit board and the second printed circuit board more firmly, and external force is applied to the touch sensor module. Even if the protective pattern disposed on the outer area of the pad portion absorbs shock, the pad portion can be prevented from being damaged, and the assembly time is shortened because a structure such as a shield case protecting them separately on the outer surface of the touch sensor module is not required. Since it is possible to reduce the cost and prevent damage to the touch sensor module, it is possible to provide the sensing of the coordinates by the user's touch and the sensing of the touch force pressing the screen when touched semi-permanently.

In the above, in order to illustrate the technical spirit of the present invention, a specific embodiment has been described with reference to the drawings, but the present invention is not limited to the same configuration and effect as the specific embodiment as described above, and various modified examples are the scope of the present invention. It can be carried out within the limits that do not deviate. Therefore, such a modified example should be regarded as belonging to the scope of the present invention, and the true technical protection scope of the present invention should be determined by the technical spirit of the following claims.

10: display device
20: display panel
100, 200: Touch sensor module
110: first printed circuit board
120: second printed circuit board
130: pad portion
140: protection pattern
150, 250: mesh part

Claims (13)

A first printed circuit board;
A second printed circuit board spaced apart from the first printed circuit board;
A plurality of pad parts connecting the first printed circuit board and the second printed circuit board to be electrically connected;
A protection pattern provided between the first printed circuit board and the second printed circuit board to protect the pad portion from impact;
Touch sensor module comprising a. The method according to claim 1,
The pad portion,
A first solder pad provided on the rear surface of the first printed circuit board,
A second solder pad provided on an upper surface of the second printed circuit board so as to face the first solder pad;
A touch sensor module including a first solder connecting the first solder pad and the second solder pad. The method according to claim 2,
The protection pattern,
A third solder pad provided on the rear surface of the first printed circuit board,
A fourth solder pad provided on an upper surface of the second printed circuit board so as to face the third solder pad,
A touch sensor module including a mesh portion provided between the third solder pad and the fourth solder pad. The method according to claim 3,
The protection pattern,
A touch sensor module made of the same height as the pad portion and disposed in an outer region of the pad portion. The method according to claim 3,
The protection pattern,
A touch sensor module including a second solder provided between the third solder pad and the fourth solder pad. The method according to claim 5,
The protection pattern is a touch sensor module in which the third solder pad, the fourth solder pad, and the mesh portion are integrally coupled by the second solder. The method according to claim 6,
The mesh portion,
A first frame disposed adjacently along an outer region of the pad portion,
A second frame spaced apart from the first frame,
It includes a plurality of connection frames connecting the first frame and the second frame in a set pattern,
A touch sensor module in which a plurality of through holes are formed to communicate with the third solder pad and the fourth solder pad between the connection frames. The method according to claim 7,
The connection frame,
A touch sensor module in which the setting pattern is formed in a honeycomb pattern centering on the through hole. The method according to claim 7,
The protection pattern,
A touch sensor module in which a plurality of mesh portions are arranged side by side between the third solder pad and the fourth solder pad. The method according to claim 3,
The protection pattern,
Between the first printed circuit board and the second printed circuit board, one cross-section of "C", "I", "L", "W", "Z", or "d" characters so that any one pattern is connected to each other Or a touch sensor module that is partially spaced apart. Display panel;
A first printed circuit board for sensing a touch generated on the display panel; a second printed circuit board for being spaced apart from the first printed circuit board and sensing touch force by a force applied to the display panel; A plurality of pad portions for connecting the first printed circuit board and the second printed circuit board to be electrically connected, and a protection pattern provided between the first printed circuit board and the second printed circuit board to protect the pad from impact Touch sensor module;
Touch display device comprising a. The method according to claim 11,
The protection pattern,
A third solder pad provided on the rear surface of the first printed circuit board,
A fourth solder pad provided on an upper surface of the second printed circuit board so as to face the third solder pad,
And a mesh portion provided between the third solder pad and the fourth solder pad. The method according to claim 12,
The mesh portion,
A first frame disposed adjacently along an outer region of the pad portion,
A second frame spaced apart from the first frame,
It includes a plurality of connection frames connecting the first frame and the second frame in a set pattern,
A plurality of through holes are formed between the connection frames to communicate with the third solder pad and the fourth solder pad, and the touch display device is coupled by the second solder.

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