KR20180134089A - Touch screen having MUX and sensor switch - Google Patents

Abstract

The present invention relates to a touch screen having a mux and a sensor switch. A touch screen according to an embodiment of the present invention includes touch sensors arranged in a matrix of a plurality of rows and columns; A plurality of sensor switches connected to the touch sensors; A plurality of muxes connected to the sensor switches; And a touch driver IC for detecting a touch based on a touch capacitance generated by the touch sensors, wherein one or more columns are classified into respective groups, and each group is classified into two or more blocks , The touch driver IC may perform the touch detection scan operation on each block basis by controlling the sensor switches and the mips.

Description

[0001] The present invention relates to a touch screen having a mux and a sensor switch,

The present invention relates to a touch screen capable of detecting a touched position, for example, by a user's finger or an electronic pen.

Generally, the touch screen is used for a mobile device such as a smart phone, a personal digital assistant (PDA), and a portable multimedia player (PMP) as well as a navigation device, a netbook, a notebook, a tablet PC, a digital information device (DID) Protocol TV) and the like.

The touch screen may be added to various types of displays such as an LCD (Liquid Crystal Display), a PDP (Plasma Display Panel), and an OLED (Organic Light Emitting Diode), or integrated into the display.

The display to which the touch screen is applied may be variously classified into an add-on type display, a touch screen on-cell type display, and a touch screen built-in type display .

The touch screen may be applied to various types of touch methods such as a resistance film type, a capacitive type, an electromagnetic induction type, an infrared type, or an ultrasonic type.

The touch screen to which the capacitive method is applied is a touch screen in which a touch input tool such as a finger or an electronic pen touches or approaches a touch sensor arranged on the touch screen, The touch position and the touch position can be detected based on the voltage change due to the touch capacitance (Ct: touch capacitance) generated in the sensor.

1 is a diagram illustrating a configuration of a touch screen having a mux.

Referring to FIG. 1, the touch screen 100 may include a plurality of touch sensors 110, a plurality of sensor signal lines 120, a plurality of muxes 130, and a touch driver IC 140 .

For example, the touch sensor 110 may be arranged in a matrix of a plurality of rows and columns, and the sensor signal line 120 may be connected to the touch sensor 110 And can be independently connected to each other.

The sensor signal line 120 transmits the touch capacitance Ct generated by the touch sensor 110 to the touch driver IC 140 through the mux 130, , And one side (e.g., the right side) of the touch sensor belonging to each column.

The plurality of muxes 130 may be disposed outside the touch driver IC 140. For example, the touch driver IC 140 is disposed on a flexible circuit board such as a COF (Chip On Film) or an FPC (Flexible Printed Circuit), and the plurality of muxes 130 are connected to the flexible circuit board May be placed on a separate touch screen panel (TSP).

The plurality of muxes 130 are connected to sensor signal lines of a touch sensor belonging to each column and select any one of the sensor signal lines to connect to the touch driver IC 140 .

For example, as shown in FIG. 1, a first Mux 1 is connected to touch sensors of first to fourth rows (Row 1 to Row 4) belonging to a first column (Col 1) And may be connected to the touch driver IC 140 by selecting any one of them.

The touch driver IC 140 drives the touch sensors and receives a touch capacitance Ct generated in the touch sensors through the sensor signal line 120 and the mux 130 to determine whether the touch sensor is touch- The touch position can be detected.

By disposing the plurality of muxes 130 on the touch screen panel TSP, the number of input ports of the touch driver IC 140 can be effectively reduced. 1, when the number of the touch sensors 110 is 32 and the number of the muxes 130 is 8, the number of input ports of the touch driver IC 140 is the same as that of the mux 130).

A more detailed description related to the touch screen having a mux as described above has already been described in detail in Korean Patent Application No. 10-2016-0113596 filed by the present applicant and will not be described below.

Embodiments of the present invention may include, for example, a mux and a sensor switch capable of effectively reducing the number of muxes and the number of input ports of each mux in a touch screen having a plurality of muxes One touch screen can be provided.

Embodiments of the present invention can improve the performance of touch detection, for example, and can reduce the number of control signal lines for controlling the mux and the sensor switch, Screen can be provided.

A touch screen having a mux and a sensor switch according to an embodiment of the present invention includes touch sensors arranged in a matrix of a plurality of rows and columns; A plurality of sensor switches connected to the touch sensors; A plurality of muxes connected to the sensor switches; And a touch driver IC for detecting a touch based on a touch capacitance generated by the touch sensors, wherein one or more columns are classified into respective groups, and each group is classified into two or more blocks , The touch driver IC may perform the touch detection scan operation on each block basis by controlling the sensor switches and the mips.

The number of groups corresponds to the number of the muxes, and the number of blocks in each group may correspond to the number of input ports of each mux.

The sensor switches and the mugs may be disposed outside the touch driver IC. The sensor switches and the mugs may be disposed on a touch screen panel on which the touch sensors are arranged.

The sensor switch can switch the touch sensor connected to the sensor switch to one of the sensing pads of the touch detection and the non-touch sensing pads.

Wherein the sensor switch includes a first port for connecting the touch sensor connected to the sensor switch to the mux, a second port for connecting to the driving voltage, and a third port for connecting to the ground, . The second port may be deleted in the sensor switch, or may be provided in two or more.

The touch drive IC may perform a touch detection scan operation for each block by interlocking a switch control signal for controlling the sensor switches and a mux control signal for controlling the mips.

The mux control signal is applied to each of the muxes in the same manner, and the switch control signal can be applied to each block in the same way. The touch driver IC may apply different switch control signals to the sensor switches in each block while performing the touch detection scan operation for each block.

Wherein the touch driver IC sequentially connects the sensor switches in the nth block so that the touch sensors of the nth block in the group are connected to the nth port of the mux in the column direction when the nth port of the mux is selected, Can be changed.

A touch screen having a mux and a sensor switch according to an embodiment of the present invention includes touch sensors arranged in a matrix of a plurality of rows and columns; A plurality of sensor switches connected to the touch sensors; A plurality of muxes connected to the sensor switches; And a touch driver IC for detecting a touch based on a touch capacitance generated by the touch sensors, wherein two neighboring columns are classified into respective groups, and each group is classified into four blocks Wherein the touch driver IC performs a touch detection scan operation in a row direction and controls the sensor switches and the mips to sequentially perform touch detection scan operations for the odd column and the even column in each block unit Can be performed.

The sensor switch may include a first port for connecting the touch sensor connected to the sensor switch to the mux, a second port for connecting to the driving voltage, and a third port for connecting to the ground .

The touch drive IC may perform a touch detection scan operation for each block by interlocking a switch control signal for controlling the sensor switches and a mux control signal for controlling the mips.

Wherein the touch driver IC sequentially connects the sensor switches in the nth block so that the touch sensors of the nth block in the group are connected to the nth port of the mux in the column direction when the nth port of the mux is selected, Can be changed.

According to the embodiment of the present invention, for example, in the touch screen having a plurality of muxes, the number of muxes and the number of input ports of each mux can be effectively reduced.

In addition, according to the embodiment of the present invention, for example, the performance of touch detection can be improved and the number of control signal lines for controlling the mux and the sensor switch can be effectively reduced.

1 is a diagram illustrating a configuration of a touch screen having a mux.
2 is a diagram illustrating a configuration of a touch screen having a mux and a sensor switch according to an embodiment of the present invention.
3 is a diagram illustrating a configuration within a first group classified according to an embodiment of the present invention.
4 is a diagram illustrating a configuration of a first multiplex according to an embodiment of the present invention.
5 is a diagram illustrating a configuration of sensor switches in a first block classified according to an embodiment of the present invention.
6 is a diagram illustrating a change in the operation state of the touch sensors of the first column according to the embodiment of the present invention.
7 is a diagram illustrating a scan process for touch detection according to an embodiment of the present invention.

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

An embodiment of the present invention relates to a touch screen having a mux and a sensor switch. For example, in a touch screen in which a plurality of muxes are arranged outside a touch drive IC (TDI), the number of muxes, The number of input ports of the mux can be efficiently reduced and the performance of the touch detection can be improved and the number of control signal lines for controlling the mux and the sensor switch can be effectively reduced.

2 is a diagram illustrating a configuration of a touch screen having a mux and a sensor switch according to an embodiment of the present invention.

2, the touch screen 200 includes a plurality of touch sensors 210, a plurality of sensor signal lines (not shown), a plurality of muxes 230, (not shown), a touch switch IC (TDI) 240, and the like.

The touch sensor 210 may be, for example, arranged in a matrix of a plurality of rows and columns and may have a unique shape in which a rectangle, a rhombus, or a plurality of rhombs are connected.

The touch sensor 210 may be formed of, for example, a conductive transparent material (e.g., ITO (indium tin oxide)) or a conductive opaque material (e.g., metal) And the like.

The sensor signal line may be independently connected to the touch sensor 210 and the touch capacitance 210 generated by the touch sensor 210 may be connected to the touch sensor 210 through the sensor switch and the mux 230, To the drive IC (240).

The sensor signal line may be, for example, a conductive transparent material (e.g., ITO) or may be formed of a conductive opaque material (e.g., metal) and may be formed of any other material, such as a sensor trace or a link line. The name can be variously called.

The plurality of muxes 230 may be disposed outside the touch driver IC 240. For example, the touch driver IC 240 is disposed on a flexible circuit board such as a COF (Chip On Film) or an FPC (Flexible Printed Circuit), and the plurality of muxes 230 are connected to the flexible circuit board May be disposed on a separate touch screen panel (TSP) or on a display to which the touch screen is applied.

The touch drive IC 240 controls the switching operation of the MUX 230 and the sensor switch in conjunction with each other and drives the touch sensors 210 and generates a touch capacitance (Ct) through the mux 230 and the sensor switch to detect whether or not the touch is made and the touch position, and may be variously called any other names such as a touch IC.

The touch driver IC 240 may be integrated with a display drive IC (DDI) included in various types of displays, such as an LCD or an OLED, integrated with the DDI, (Touch Display Drive IC), and can be interfaced with a CPU or an MCU included in various types of electronic devices such as a smart phone or an inspection device.

2, the touch driver IC 240 includes a driver 241 for touch driving, a touch detection unit 242 for touch detection, a signal processing unit 243 for touch signal processing, A memory unit 244 for storing touch data, a power supply unit 245 for supplying power, a controller 246 for touch driving and detection control, a timing control unit 247 for touch timing control, A voltage generation unit 248, and a communication unit 249 for external communication.

The controller 246 may include at least one of the touch detection unit 242, the signal processing unit 243 and the timing control unit 247 and may control at least one of the components, , And can perform an interface with an external component through the communication unit (249). The memory unit 244 may be, for example, a line memory or a frame memory.

According to an embodiment of the present invention, the plurality of muxes 230 may be disposed on a touch screen panel TSP or on a display to which the touch screen is applied. For example, The number of input ports of the touch driver IC can be reduced while reducing the number of muxes.

Hereinafter, for convenience of explanation, the touch sensors are arranged in a matrix form of first to fourth rows (Row 1 to Row 4) and first to eighth columns (col 1 to 8) Will be described in detail with reference to embodiments of the present invention.

2, among the 32 touch sensors arranged in four rows and eight columns, the touch sensors of the first and second columns Col1 and Col2 are arranged in the first group ( The touch sensors of the third and fourth columns Col3 and Col4 are classified into the second group Group2 and the touch sensors of the fifth and sixth columns Col5 and Col6 are classified into the third And the touch sensors of the seventh and eighth columns Col7 and Col8 may be classified into the fourth group (Group 4).

Here, one group can correspond to one mux. For example, if two columns are divided into one group out of a total of eight columns, the number of muxes becomes four. For example, if four columns among eight columns are classified into one group, The number of muxes can be two. The number of columns classified into each group may be arbitrarily changed according to, for example, various touch detection methods.

In the embodiment of the present invention, for example, a scan operation is performed in a row direction for touch detection, and an odd field (or an odd column) and an even field (or an odd column) are discriminated A touch detection method for sequentially scanning an object to be scanned will be described in detail.

The touch sensors in each group may be classified into a plurality of blocks. For example, as shown in FIG. 2, among the eight touch sensors in the first group (Group 1), the first and second touch sensors T11 and T21 of the first column correspond to the first block (Block 1) And the third and fourth touch sensors T21 and T41 of the first column are classified into a second block Block2 and the first and second touch sensors T21 and T22 of the second column are classified into a first block, The third and fourth touch sensors T32 and T42 of the second column may be classified into a fourth block Block4.

Here, the number of blocks in each group may correspond to the number of input ports of each mux. For example, if the first group is classified into four blocks, the number of input ports of the first mux is four. For example, if the first group is classified into two blocks, the input ports of the first mux The number may be two. The number of blocks in each group can be arbitrarily changed according to various touch detection methods, for example.

3 is a diagram illustrating a configuration within a first group classified according to an embodiment of the present invention.

According to the embodiment of the present invention, each group can be classified into the same number of blocks, and each block can include the same number of touch sensors and sensor switches.

Referring to FIG. 3, the first group (Group 1) can be classified into first to fourth blocks (Block 1 to 4), and the first to fourth blocks (Block 1 to 4) Touch sensors and two sensor switches SW1 and SW2.

The sensor switch SW is turned on when the touch sensor connected to the sensor switch becomes an operating state of a sensing pad for generating a touch capacitance Ct for touch detection, A non-sensing pad which does not generate the capacitance Ct can be operated.

Here, the sensor switch SW may be variously referred to as any other name such as, for example, a state conversion switch.

The first switch control signal S_CTL1 and the second switch control signal S_CTL2 are simultaneously applied to the first through fourth blocks Block1 through Block 4, The two sensor switches SW2 can cause the first touch sensor and the second touch sensor in the block to be in different operating states.

For example, each of the first touch sensors T11, T31, T12, and T32 included in the first to fourth blocks (blocks 1 to 4) is in an operating state of a sensing pad, Each of the second touch sensors T21, T42, T22, and T42 included in the first to fourth blocks may be an operating state of a non-sensing pad.

The first muxes 230 belonging to the first group may be provided with input ports corresponding to the number of blocks belonging to the first group. For example, the first mux 230 may include four input ports I1 through I4 and one output port O1, and the first and second switch control signals S_CTL1 and S_CTL2 may be provided. The mux control signal M_CTL can be applied.

For example, the mux control signal M_CTL may include one of the four touch sensors operating as sensing pads in the first through fourth blocks (blocks 1 through 4) And may be interlocked with the first and second switch control signals S_CTL1 and S_CTL2.

Here, the mux and the sensor switch may be disposed outside the touch driver IC, as described above. For example, on a touch screen panel, or on a display to which the touch screen is applied.

4 is a diagram illustrating a configuration of a first multiplex according to an embodiment of the present invention.

According to an embodiment of the present invention, one mux may include a plurality of input ports and one output port, and a mux control signal applied to the mux may be interlocked with the switch control signals.

4, the first mux 230 may include four input ports I1 through I4 and one output port O1. The first and second switch control signals S_CTL1, The mux control signal M_CTL interlocked with the S_CTL2 may be applied.

For example, the first mux 230 selects the first input port I1, selects the first touch sensor T11 operating as a sensing pad in the first block Block1, And selects the second input port I2 to select the first touch sensor T31 that operates as a sensing pad in the second block Block2 and then selects the third input port I3, The first touch sensor T12 that operates as a sensing pad in the third block Block3 is selected and then the fourth input port I4 is selected to select the first touch sensor T12 as the sensing pad in the fourth block, 1 touch sensor (T32) can be selected.

That is, the first mux 230 is sequentially switched by the mux control signal M_CTL interlocked with the first and second switch control signals, so that the first, second, 1 touch sensors T11, T31, T12, and T32 can be sequentially selected.

Thereafter, the first mux 230 selects the first input port I1, selects the second touch sensor T21 operating as a sensing pad in the first block, A second touch sensor T41 that operates as a sensing pad in the second block is selected and then a third input port I3 is selected to select the second touch sensor T41 in the third block, A second touch sensor T22 that operates as a sensing pad in the fourth block can be selected by selecting the second touch sensor T22 that operates as a sensing pad and then selecting the fourth input port I4.

That is, the first mux 230 is sequentially switched by the mux control signal M_CTL interlocked with the first and second switch control signals, so that the first, second, 2 touch sensors T21, T41, T22, and T42 can be sequentially selected. Thus, the touch detection scan operation can be performed on a block-by-block basis.

5 is a diagram illustrating a configuration of sensor switches in a first block classified according to an embodiment of the present invention.

According to the embodiment of the present invention, the same number of touch sensors and sensor switches may be included in one block. For example, the first block (Block1) may include first and second touch sensors T11 and T21 and first and second sensor switches SW1 and SW2.

The sensor switch may include at least one state change port to allow the touch sensor connected to the sensor switch to be in an operating state of a sensing pad or an operating state of a non-sensing pad .

5, the first sensor switch SW1 and the second sensor switch SW2 may be provided with first to third ports S, D and G, respectively, The second port D may be a driving voltage Vdrv port for connecting the touch sensor to the driving voltage, The third port G may be a ground (GND) port for connecting the touch sensor and the ground.

Here, the driving voltage may be a DC voltage alternating between a high level and a low level, and may be a touch driving voltage supplied by the voltage generator 248, which has been described above with reference to FIG.

The second port D existing between the first port S and the third port G may be deleted or may be expanded to two or more ports D1 and D2.

For example, the touch sensors connected to the first port (S1) and vertically adjacent to each other in the same column on the basis of the touch sensor operating as a sensing pad are connected to the second port (D) In the case of operating as the sensing pads, an inter-line capacitance is generated between the sensor signal line of the sensing pad and the sensor signal lines of the non-sensing pads, and the sensitivity of the touch detection can be improved by using the inter-line capacitance .

Here, the specific technical content for improving the sensitivity of the touch detection using the line-to-line capacitance is described in detail in Korean Patent No. 10-1602842 of the present applicant, and will not be described below.

5, the first sensor switch SW1 is provided with three different switch control signals S_CTL1-1 and S_CTL1-S11 for operating the touch sensor T11 connected to the first sensor switch as a sensing pad, 2, S_CTL1-3) may be applied.

For example, the first port S of the first sensor switch SW1 is turned on by the S_CTL1-1 signal and the remaining second port D and the third port G are turned on by the S_CTL1-2 signal And the touch sensor T11 connected to the first sensor switch is turned off by the S_CTL1-3 signal, so that the sensing pad can be in an operating state.

Meanwhile, the second sensor switch SW2 is provided with three switch control signals S_CTL2-1, S_CTL2-1, and S_CTL2-2 so that the touch sensor T21 connected to the second sensor switch is a non- S_CT21-2, S_CTL2-3) may be applied.

For example, the second port D of the second sensor switch SW2 is turned on by the S_CTL2-2 signal, and the remaining first port S and the third port G are turned on by the S_CTL2-1 signal And the touch sensor T21 connected to the second sensor switch is turned off by the S_CTL2-3 signal to be in an operating state in which the driving voltage is applied while being a non-sensing pad.

6 is a diagram illustrating a change in the operation state of the touch sensors of the first column according to the embodiment of the present invention.

As shown in FIG. 6, for convenience of explanation of the embodiment of the present invention, 14 touch sensors are included in the first column Col1, and the first column Col1 corresponds to the first block Col1 Block 1) and the second block (Block 2).

As described above, since the same number of touch sensors and sensor switches are included in each block, the first block and the second block each include seven touch sensors and seven sensor switches.

First to seventh switch control signals for controlling the seven sensor switches are applied to the first block and the second block, and the first to seventh switch control signals are applied to the first block and the second block, From the first touch sensor to the seventh touch sensor in the second block, the sensing pad can be in an operating state sequentially.

Other touch sensors adjacent to each other in the vertical direction on the same column with respect to the sensing pad can be applied as a non-sensing pad while driving voltages can be applied to the other touch sensors, and the ground can be connected to the remaining touch sensors as a non-sensing pad.

Referring to FIG. 6, at the operation time t1, the first touch sensors of the first block and the second block are each a sensing pad SP, and the second, third, 6 and 7 are touch sensing pads (NP-V) to which a driving voltage is applied, respectively, and the fourth and fifth touch sensors of the first block and the second block are connected to ground Pad (NP-G).

Then, at the operation time t2, the second touch sensors of the first block and the second block become the sensing pads SP, respectively, and the first, third, fourth, and seventh Each of the touch sensors is a non-sensing pad (NP-V) to which a driving voltage is applied, and the fifth and sixth touch sensors of the first block and the second block are connected to a ground (NP- G).

Then, at the operation time t3, the third touch sensors of the first block and the second block are each a sensing pad SP, and the first, second, fourth, fifth Each of the touch sensors is a non-sensing pad (NP-V) to which a driving voltage is applied, and the fifth and sixth touch sensors in the first block and the second block are NP- G).

6, the sensing pad SP and the non-sensing pads NP-V and NP-G may be sequentially changed in each block at each of the operation times t4 to t7 . Here, since the first block and the second block belong to the first group corresponding to the first mux as described above, the sensing pads sequentially changed in the first block are connected to the first port of the first mux And the sensing pads sequentially changed in the second block are sequentially output through the first port of the first mux.

This results in sequentially scanning the fourteen touch sensors belonging to the first column. In each block, the number of the non-sensing pads NP-V, which are present between the sensing pad SP and the non-sensing pad NP-G connected to the ground, For example, two, zero, one, or three or more, as shown in the operation time t4 in FIG.

7 is a diagram illustrating a scan process for touch detection according to an embodiment of the present invention.

For convenience of explanation of the embodiment of the present invention, as shown in Fig. 7, six touch sensors are included in each column, neighboring two columns are classified into one group, and 6 An example in which three vertical touch sensors among the plurality of touch sensors are classified into respective blocks will be described.

Referring to FIG. 7, a scan operation is performed in a row direction for touch detection, and an odd field (or an odd column) and an even field (or an excellent column) are sequentially scanned In the touch detection method, when the operation time T1 for performing the first block scan operation (Block1-Scan) is reached, the touch sensors belonging to the first block in each group sequentially become the sensing pads.

Thereafter, when the operation time T2 for performing the second block scan operation (Block2-Scan) is reached, the touch sensors belonging to the second block in each group sequentially become the sensing pads, and then the third block scan operation (Block3- The touch sensors belonging to the third block in each group become sequentially the sensing pads.

Thereafter, when the operation time T4 for performing the fourth block scan operation (Block4-Scan) is reached, the touch sensors belonging to the fourth block in each group sequentially become the sensing pads.

Accordingly, the scan operation of the odd field, which sequentially performs the scan operations for the first block and the second block, is performed, and then the scan operation for the odd field is performed sequentially for the third block and the fourth block. The scanning result of the odd field and the field is summed up to obtain the scan result of touch detection for one frame.

The embodiments of the present invention described in detail above may be implemented individually or in combination with each other. The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications and variations are possible without departing from the technical spirit of the present invention. Which will be apparent to those skilled in the art to which the present invention pertains.

200: touch screen 210: touch sensor
230: MUX 240: Touch-Driven IC
SW1, SW2: Sensor switch

Claims (15)

Touch sensors arranged in a matrix of a plurality of rows and columns;
A plurality of sensor switches connected to the touch sensors;
A plurality of muxes connected to the sensor switches; And
And a touch drive IC for detecting a touch based on a touch capacitance generated by the touch sensors,
One or more columns are grouped into groups, each group being grouped into two or more blocks,
Wherein the touch driver IC controls the sensor switches and the muxes to perform a touch detection scan operation in each block unit.
The method according to claim 1,
Wherein the number of the groups corresponds to the number of the muxes,
Wherein the number of blocks in each group corresponds to the number of input ports of each of the muxes.
The method according to claim 1,
Wherein the sensor switches and the mugs are disposed outside the touch driver IC.
The method according to claim 1,
Wherein the sensor switches and the mugs are disposed on a touch screen panel on which the touch sensors are arranged.
The method according to claim 1,
Wherein the sensor switch switches the touch sensor connected to the sensor switch to one of a sensing pad for touch detection and a non-touch sensing nansing pad. screen.
The method according to claim 1,
Wherein the sensor switch includes a first port for connecting the touch sensor connected to the sensor switch to the mux, a second port for connecting to the driving voltage, and a third port for connecting to the ground, And a touch screen having a mux and a sensor switch.
The method according to claim 6,
Wherein the second port is deleted or provided in the sensor switch.
The method according to claim 1,
Wherein the touch driver IC interlocks a switch control signal for controlling the sensor switches and a mux control signal for controlling the muxes to perform a touch detection scan operation for each block. Touch screen with switch.
9. The method of claim 8,
The mux control signal is applied to each mux equally,
Wherein the switch control signal is applied to each block in the same manner.
9. The method of claim 8,
Wherein the touch driver IC applies different switch control signals to the sensor switches in each block while performing a touch detection scan operation for each block unit. .
9. The method of claim 8,
Wherein the touch driver IC sequentially connects the sensor switches in the nth block so that the touch sensors of the nth block in the group are connected to the nth port of the mux in the column direction when the nth port of the mux is selected, Wherein the touch screen includes a switch and a sensor switch.
Touch sensors arranged in a matrix of a plurality of rows and columns;
A plurality of sensor switches connected to the touch sensors;
A plurality of muxes connected to the sensor switches; And
And a touch drive IC for detecting a touch based on a touch capacitance generated by the touch sensors,
Two neighboring columns are classified into respective groups, and each of the groups is classified into four blocks,
The touch driver IC performs a touch detection scan operation in a row direction and controls the sensor switches and the muxes to sequentially perform a touch detection scan operation for an odd column and a superior column in each block unit Wherein the touch screen has a mux and a sensor switch.
13. The method of claim 12,
The sensor switch has a first port for connecting the touch sensor connected to the sensor switch to the mux, a second port for connecting to the driving voltage, and a third port for connecting to the ground A touch screen having a mux and a sensor switch.
13. The method of claim 12,
Wherein the touch driver IC interlocks a switch control signal for controlling the sensor switches and a mux control signal for controlling the muxes to perform a touch detection scan operation for each block. Touch screen with switch.
15. The method of claim 14,
Wherein the touch driver IC sequentially connects the sensor switches in the nth block so that the touch sensors of the nth block in the group are connected to the nth port of the mux in the column direction when the nth port of the mux is selected, Wherein the touch screen includes a switch and a sensor switch.

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