KR20150064416A - Touch screen device and touch screen display device using the same - Google Patents

Abstract

A touch screen integrated display device according to an aspect of the present invention includes: a touch screen panel including a plurality of first electrodes arranged in parallel in a first direction and a plurality of second electrodes arranged in parallel in a second direction; The method of claim 1, further comprising the steps of: applying a touch drive pulse to each of the plurality of first electrodes in response to a control signal; sensing a touch signal from each of the plurality of second electrodes to detect touch; A touch circuit unit for applying the touch driving pulse to one electrode of the plurality of electrodes and receiving the sensing signal from one of at least two adjacent ones of the plurality of second electrodes to sense whether or not the touch is generated; And a touch unit adjusting unit for switching connections between the at least two electrodes among the plurality of first electrodes according to the control signal and for switching connections between the at least two electrodes among the plurality of second electrodes Lt; / RTI >

Description

TECHNICAL FIELD [0001] The present invention relates to a touch screen device and a touch screen display device using the touch screen device.

The present invention relates to a touch screen panel, and more particularly, to a touch screen device and a touch screen display device using the touch screen device.

The touch screen may include a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), an electroluminescent display (ELD) Such as an electrophoretic display (EPD), and is an input device for the user to input information by directly touching the screen with a finger or a pen while viewing the display device.

In recent years, such a touch screen has been divided into a plurality of touch driving areas and a plurality of touch sensing areas, so that mutual capacitance is generated between the touch driving area and the touch sensing area, so that the amount of mutual capacitance change It is common to recognize whether the touch is measured or not.

On the other hand, when the touch is recognized by the reciprocal capacitance method, when the touch area is small, the change of the capacitance due to the touch is too small to recognize the touch.

Specifically, since the area of the pen touch input when the pen touch is input is much smaller than the area of the finger touch on which the average is inputted, it is difficult to recognize the touch of the pen, and a separate pen touch input device must be attached for recognition of the pen touch .

In addition, since a touch screen is mainly used for a mobile device such as a mobile device and a tablet device, a need for power consumption reduction is emphasized, so that a power consumption is increased due to a general touch driving method even in an idle state have.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a touch screen integrated display capable of variably adjusting the size of a touch unit.

According to an aspect of the present invention, there is provided a touch screen device including a touch screen including a plurality of first electrodes arranged in parallel in a first direction and a plurality of second electrodes arranged in parallel in a second direction, panel; The method of claim 1, further comprising the steps of: applying a touch drive pulse to each of the plurality of first electrodes in response to a control signal; sensing a touch signal from each of the plurality of second electrodes to detect touch; A touch circuit unit for applying the touch driving pulse to one electrode of the plurality of electrodes and receiving the sensing signal from one of at least two adjacent ones of the plurality of second electrodes to sense whether or not the touch is generated; And a touch unit adjusting unit for switching connections between the at least two electrodes among the plurality of first electrodes according to the control signal and for switching connections between the at least two electrodes among the plurality of second electrodes do.

According to the embodiments of the present invention, not only the finger touch recognition but also the pen touch recognition is possible in one touch screen device without the addition of a separate pen touch input device by variably adjusting the touch unit, The power consumption can be reduced by distinguishing the touch driving in the idle state.

FIGS. 1 to 3 schematically illustrate examples of configurations of a touch screen device according to embodiments of the present invention; FIG.
FIGS. 4 to 6 are schematic views illustrating examples of a configuration of a touch screen display device according to embodiments of the present invention; FIG.
7 and 8 are timing charts showing examples of a method of driving a touch screen display device according to embodiments of the present invention; And
9 is a view showing an example of connection states of electrodes according to the touch driving mode shown in FIGS. 7 and 8. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 are views schematically showing examples of the configuration of a touch screen device according to embodiments of the present invention.

1 and 3, the touch screen device 10 includes a touch screen panel 100, a touch circuit unit 200, a touch unit adjustment unit 300, and a control unit 400.

First, the touch screen panel 100 includes a plurality of first electrodes 110 and a plurality of second electrodes 120. The plurality of first electrodes 112 are arranged in parallel in the first direction, And the second electrodes 114 are arranged in parallel in the second direction.

For example, as shown in FIGS. 1 and 2, each of the plurality of first electrodes 110 is arranged in parallel in the y-axis direction, and is positioned in parallel with the x-axis direction as shown in FIG. 3, As shown in FIGS. 1 and 2, each of the plurality of second electrodes 120 may be disposed in parallel in the x-axis direction, and may be positioned in the y-axis direction as shown in FIG. The plurality of first electrodes may be a touch driving (TX) electrode to which a plurality of driving pulses are applied, and the plurality of second electrodes may be a touch sensing (RX) electrode generating a sensing signal.

Next, the touch circuit unit 200 applies a touch driving pulse to each of the plurality of first electrodes 110 according to a control signal, receives a sensing signal from each of the plurality of second electrodes 120, (Hereinafter referred to as " first mode ") or one of at least two adjacent ones of the plurality of first electrodes, and applies a touch drive pulse to one of at least two adjacent ones of the plurality of second electrodes (Hereinafter referred to as " second mode ").

To this end, the touch circuit unit 200 includes a driving unit 210 and a sensing unit 220.

For example, as shown in FIGS. 1 to 3, the driving unit 210 and the sensing unit 220 operate according to a control signal of the control unit 400, The touch panel is operated in the first mode when the touch input is present or when the touch ID is present, and in the second mode when the touch input type of the previous frame is the finger touch or the touch ID is not present.

In addition, when the driving unit and the sensing unit of FIGS. 1 and 3 operate in the second mode, a touch driving pulse is applied to one of two adjacent ones of the plurality of first electrodes, A sensing signal can be received from one of the electrodes to detect whether or not the touch is detected. When the driving unit and the sensing unit of FIG. 2 operate in the second mode, the touch driving pulse is applied to one of the three adjacent electrodes among the plurality of first electrodes, and one of the three adjacent electrodes among the plurality of second electrodes A touch signal can be sensed from the electrode of the touch panel.

In the meantime, the embodiments of the present invention are explained by using two neighboring electrodes or three neighboring electrodes as a unit for convenience of explanation, but the embodiments of the present invention are not limited thereto and may be four or more neighboring electrodes.

In other words, the touch screen device according to embodiments of the present invention is capable of adjusting the number of touch electrodes to which a touch driving pulse is applied and the number of touch electrodes to output a sensing signal for each touch driving mode.

Next, the touch-unit adjusting unit 300 switches connection of at least two of the plurality of first electrodes 110 according to a control signal, and connects at least two electrodes of the plurality of second electrodes 120 to each other Lt; / RTI >

To this end, the touch unit adjusting unit 300 may include a plurality of first switches 310 connecting a plurality of first electrodes and a plurality of second switches 320 connecting a plurality of second electrodes. On the other hand, the plurality of first switches and the plurality of second switches may be a thin film transistor (TFT) which operates in accordance with a control signal applied to the gate electrode. For example, the plurality of first and second switches may be NMOS, and a high level voltage needs to be applied to the gate electrode of the NMOS to turn on each of the switches. Conversely, the plurality of first and second switches may be PMOS, and a low level voltage needs to be applied to the gate electrode of the PMOS in order to turn on each of the switches.

The touch unit adjustment unit 300 includes (p-1) first switches for each of the plurality of first electrodes p (where p is an integer equal to or greater than two), and the first switch includes the p And can be connected between the electrodes. In addition, the touch unit adjusting unit may include (q-1) second switches for every q of the plurality of second electrodes (q is an integer of 2 or more), and the second switch may include Respectively.

For example, the first switch and the second switch shown in FIGS. 1 and 3 are connected to one switch for each of two adjacent electrodes, and the first switch and the second switch shown in FIG. It can be seen that two switches are connected per electrode.

Further, the touch-unit adjusting unit 300 may be located within the touch-screen panel or within the touch-sensitive circuitry.

For example, as shown in FIGS. 1 and 2, the touch-unit adjusting unit 300 is located within the touch-screen panel 100 to control the connection of the plurality of first electrodes and the plurality of second electrodes, As shown in FIG. 3, the touch unit can be adjusted by controlling the connection of the plurality of first electrodes and the plurality of second electrodes in the touch circuit unit 200.

In the meantime, the embodiments of the present invention are described for adjusting the touch units in units of adjacent two electrodes or three adjacent electrodes for convenience of explanation. However, the present invention is not limited to this, The unit can be adjusted.

In other words, the touch screen device according to the embodiments of the present invention can adjust the touch unit by controlling connection of each of the plurality of first electrodes and the plurality of second electrodes.

Next, the control unit 400 determines whether the type of touch is a pen touch or a finger touch for each frame, generates a control signal according to the type of touch and applies the control signal to the touch circuit unit 200 and the touch unit adjustment unit 300 Or whether or not touch IDs are generated for each frame, and generates control signals corresponding to the presence or absence of the touch IDs, and applies the control signals to the touch circuit unit 200 and the touch unit adjustment unit 300.

For example, the control unit 400 receives the raw data from the touch circuit unit 200, determines the type of touch, and outputs a control signal according to the determination result to the touch circuit unit 200 and the touch- (300).

Specifically, first, when a control signal corresponding to a touch type is applied to the touch circuit unit 200 and the touch unit adjustment unit 300, the touch circuit unit 200 operates in the first mode described above, (300) cuts off connection of each of at least two electrodes among a plurality of first electrodes, and can cut off connection of at least two electrodes among a plurality of second electrodes.

On the other hand, when a control signal corresponding to a finger type is applied to the touch circuit unit 200 and the touch unit adjustment unit 300, the touch circuit unit 200 operates in the second mode described above, At least two electrodes of the plurality of first electrodes are connected to each other, and at least two electrodes of the plurality of second electrodes are connected to each other.

For example, the control unit 400 receives raw data from the touch circuit unit 200, determines a normal state or an idle state according to the presence or absence of a touch ID, It is possible to apply a signal (Control) to the touch circuit unit 200 and the touch unit adjusting unit 300.

Specifically, if the touch ID is a control signal corresponding to a normal state in which the touch ID is present, the touch circuit unit 200 operates in the first mode described above, and the touch unit adjusting unit 300 receives at least one of the plurality of first electrodes The connection between the two electrodes is cut off, and at least two electrodes among the plurality of second electrodes are disconnected from each other.

On the other hand, when a control signal corresponding to the idle state corresponding to the absence of the touch ID is applied to the touch circuit unit 200 and the touch unit adjustment unit 300, the touch circuit unit 200 operates in the second mode described above , The touch-unit adjusting unit 300 may connect the first electrode and the second electrode to each other by connecting at least two electrodes among the plurality of first electrodes.

The touch circuit unit 200 and the control unit 400 according to embodiments of the present invention may be located within one touch IC and only the touch circuit unit 200 is included in the touch IC. Can be located outside the IC. In addition, the controller 400 may correspond to a micro control unit (MCU).

Therefore, when the touch input of the previous frame is the pen touch or the normal state, the touch screen device according to the embodiments of the present invention cuts the connections of the plurality of first electrodes and the plurality of second electrodes, And when the touch input of the previous frame is in a finger touch or idle state, the touch can be detected by connecting a plurality of first electrodes and a plurality of second electrodes by a predetermined number of units and adjusting the touch unit to a large extent .

Meanwhile, the above-described touch screen device 10 of the present invention can be combined with various types of display panels to constitute a touch screen display device.

Hereinafter, a touch screen display device according to embodiments of the present invention will be described with reference to the drawings.

4 to 6 are views schematically illustrating examples of the configuration of a touch screen display device according to embodiments of the present invention.

The display panel 20 shown in FIGS. 4 to 6 is a liquid crystal display device, and the present invention is not limited thereto. For example, a field emission display device, a plasma display panel, an electroluminescent display device, Electrophoretic display devices, and the like. In addition, a description of the general configuration of the liquid crystal display device will be omitted.

4, the touch screen display device 1 according to embodiments of the present invention includes a touch screen panel 100 of the touch screen device 10 on the upper polarizer POL1 of the display panel 20, Or the touch screen panel 100 of the touch screen device 10 is positioned between the upper polarizer POL1 and the upper substrate GLS1 of the display panel 20 as shown in Fig. The touch screen panel 100 of the touch screen device 10 may be embedded in the display panel 20, as shown in FIG. Here, "GLS2" denotes a lower substrate and "POL2" denotes a lower polarizer plate.

At least one of the plurality of first electrodes and the plurality of second electrodes included in the touch screen panel 100 shown in FIG. 6 may function as a touch electrode and a common electrode.

For example, when the plurality of first electrodes function as a common electrode and a touch electrode, the plurality of second electrodes perform only the function of the touch electrode, or the plurality of second electrodes perform the functions of the common electrode and the touch electrode The plurality of first electrodes can perform only the function of the touch electrode. In addition, both of the plurality of first electrodes and the plurality of second electrodes can perform the functions of the common electrode and the touch electrode.

Hereinafter, a method of driving a touch screen display according to embodiments of the present invention will be described with reference to the drawings.

FIGS. 7 and 8 are timing diagrams illustrating examples of a method of driving a touch screen display device according to embodiments of the present invention. FIG. 9 is a diagram illustrating an example of connection states of electrodes according to the touch driving modes shown in FIGS. Fig.

7 corresponds to the timing chart of the touch screen display apparatus shown in Figs. 4 and 5, and the timing chart shown in Fig. 8 corresponds to the timing chart of the touch screen display apparatus shown in Fig. 6 .

The touch screen display device according to the timing diagram shown in FIG. 7 detects whether or not the touch panel is touched every frame separately from the driving of the display panel, and the touch driving method of the next frame can be determined according to the touch type or touch state of the previous frame.

For example, when it is determined that the touch input of the previous frame is the pen touch or the normal state, the control unit outputs a low level control signal as shown in FIG. 7, The pulses can be sequentially applied. Accordingly, as shown in FIG. 9, the connection of the plurality of first electrodes TX and the plurality of second electrodes RX may be cut off. In addition, when it is determined that the touch input of the previous frame is a finger touch or an idle state, the control unit outputs a control signal of a high level, as shown in FIG. 7, The touch driving pulse may be sequentially applied. Accordingly, as shown in FIG. 9, it can be seen that a plurality of first electrodes TX and a plurality of second electrodes RX are connected for each of the two electrodes, resulting in enlargement of the size of the touch unit.

The touch screen display device according to the timing diagram shown in FIG. 8 has a touch panel built in the display panel, so that the display driving and the touch driving can be time-divided every frame, and according to the touch type or touch state of the previous frame, Of course, is determined.

For example, if it is determined that the touch input of the previous frame is the pen touch or the normal state, as shown in FIG. 8, the control unit outputs a low level control signal after the display driving period, TX) may be successively applied. Accordingly, as shown in FIG. 9, the connection of the plurality of first electrodes TX and the plurality of second electrodes RX may be cut off. If it is determined that the touch input of the previous frame is a finger touch or an idle state, as shown in FIG. 8, the control unit outputs a control signal of a high level after the display driving period, The same touch drive pulse can be sequentially applied according to the connection. Accordingly, as shown in FIG. 9, it can be seen that a plurality of first electrodes TX and a plurality of second electrodes RX are connected for each of the two electrodes, resulting in enlargement of the size of the touch unit.

In other words, when the touch input of the previous frame is a pen touch, the size of the touch unit may be adjusted to be small enough to detect the touch of the pen, or the size of the touch unit may be adjusted so that the touch is generally sensed when it is in the normal state. On the contrary, when the touch input of the previous frame is a finger touch, the size of the touch unit is adjusted to be large enough to suit the finger touch detection, the number of touch drive pulses applied to reduce power consumption in the idle state is reduced, Can be adjusted.

Accordingly, the touch screen display device according to the embodiments of the present invention can adjust the size of the touch unit variably so that not only the finger touch recognition but also the pen touch recognition can be performed in one touch screen device without the addition of a separate pen touch input device , The power consumption can be reduced by distinguishing the touch operation in the normal state and the idle state.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: touch screen panel 200: touch circuit part
300: touch unit adjustment unit 400:

Claims (13)

A touch screen panel including a plurality of first electrodes arranged in parallel in a first direction and a plurality of second electrodes arranged in parallel in a second direction;
The method of claim 1, further comprising the steps of: applying a touch drive pulse to each of the plurality of first electrodes in response to a control signal; sensing a touch signal from each of the plurality of second electrodes to detect touch; A touch circuit unit for applying the touch driving pulse to one electrode of the plurality of electrodes and receiving the sensing signal from one of at least two adjacent ones of the plurality of second electrodes to sense whether or not the touch is generated; And
And a touch unit adjusting unit for switching connections between the at least two electrodes among the plurality of first electrodes according to the control signal and for switching connections between the at least two electrodes among the plurality of second electrodes A touch screen device comprising a touch screen panel. The method according to claim 1,
Wherein the touch unit adjustment unit comprises:
(P-1) first switches for each of the p electrodes (p is an integer equal to or greater than 2) of the plurality of first electrodes, and the first switch is connected to each of the p electrodes among the plurality of first electrodes And,
(Q-1) second switches for every q of the plurality of second electrodes (q is an integer equal to or greater than 2), and the second switch is connected to each of the q electrodes among the plurality of second electrodes Wherein the touch screen device is a touch screen device. The method according to claim 1,
Wherein the touch unit adjustment unit comprises:
Wherein the touch screen panel is located within or within the touch screen panel. The method according to claim 1,
Further comprising a controller for determining whether the touch is a pen touch or a finger touch for each frame,
Wherein the controller generates a control signal according to the kind of the touch and applies the control signal to the touch circuit unit and the touch unit controller. 5. The method of claim 4,
When the control signal is a signal corresponding to the pen touch,
Wherein the touch circuit unit applies the touch driving pulse to each of the plurality of first electrodes, receives the sensing signal from each of the plurality of second electrodes to sense whether or not the touch is performed,
Wherein the touch unit adjusting unit cuts off the connection of the at least two electrodes among the plurality of first electrodes and interrupts the connection of the at least two electrodes among the plurality of second electrodes. 5. The method of claim 4,
When the control signal is a signal corresponding to the finger touch,
Wherein the touch circuit unit applies the touch driving pulse to one electrode of at least two adjacent ones of the plurality of first electrodes and applies the touch signal to one electrode of at least two adjacent ones of the plurality of second electrodes And detects whether or not the touch is received,
Wherein the touch unit adjustment unit connects the at least two electrodes among the plurality of first electrodes and connects the at least two electrodes among the plurality of second electrodes. The method according to claim 1,
Further comprising a controller for determining whether or not a touch ID corresponding to the touch is detected for each frame,
Wherein the control unit generates a control signal according to the presence or absence of the touch ID and applies the control signal to the touch circuit unit and the touch unit adjustment unit. 8. The method of claim 7,
If the control signal is a signal corresponding to a touch ID,
Wherein the touch circuit unit applies the touch driving pulse to each of the plurality of first electrodes, receives the sensing signal from each of the plurality of second electrodes to sense whether or not the touch is performed,
Wherein the touch unit adjusting unit cuts off the connection of the at least two electrodes among the plurality of first electrodes and interrupts the connection of the at least two electrodes among the plurality of second electrodes. 8. The method of claim 7,
When the control signal is a signal corresponding to the absence of the touch ID,
Wherein the touch circuit unit applies the touch driving pulse to one electrode of at least two adjacent ones of the plurality of first electrodes and applies the touch signal to one electrode of at least two adjacent ones of the plurality of second electrodes And detects whether or not the touch is received,
Wherein the touch unit adjustment unit connects the at least two electrodes among the plurality of first electrodes and connects the at least two electrodes among the plurality of second electrodes. The method according to claim 1,
The touch circuit unit is located inside the touch IC,
A driver for applying the touch driving pulse to each of the plurality of first electrodes in accordance with the control signal or applying the touch driving pulse to one electrode of at least two adjacent ones of the plurality of first electrodes; And
Receiving the sensing signal from each of the plurality of second electrodes according to the control signal to sense the touch or receiving the sensing signal from one of the at least two adjacent electrodes among the plurality of second electrodes, And a sensing unit for sensing whether or not the user touches the touch screen. 8. The method according to claim 4 or 7,
Wherein the touch circuit unit and the control unit are located inside a single touch IC. The touch screen device according to any one of claims 1 to 10, And
And a display panel positioned on the touch screen panel of the touch screen device. The touch screen device according to any one of claims 1 to 10, And
And a display panel including the touch screen panel of the touch screen device,
Wherein at least one of the plurality of first electrodes and the plurality of second electrodes performs a function of a touch electrode and a function of a common electrode.

Images