KR20160016548A - Semiconductor device and method for operating the same - Google Patents

Abstract

A semiconductor device and a method of operating the same are provided. A semiconductor device includes a touch screen panel including a plurality of hover sensors for performing self capacitance sensing; A TX driver for providing a plurality of driving signals to the touch screen panel; An RX sensing unit sensing a hover input from the touch screen panel; And an encoding unit encoding the plurality of drive signals provided from the TX driver and providing the encoded plurality of drive signals to the touch screen panel.

Description

Technical Field [0001] The present invention relates to a semiconductor device and a method of operating the same,

The present invention relates to a semiconductor device and a method of operating the same.

And may receive a touch input or a spatial input from a touch screen panel to control the electronic device as the user intends. Especially, at least a part of the body of the user or the space input generated by the movement of the object in the space is sensed by a signal smaller than the touch input, so that it is particularly required to improve the accuracy in sensing the space input do.

Open Publication No. 2013-0109212 discloses a touch panel system and an electronic apparatus.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a semiconductor device for improving the sensing accuracy of a space input to a touch screen panel or a hover input and miniaturizing a touch screen panel driving circuit.

According to another aspect of the present invention, there is provided a method of operating a semiconductor device for improving a sensing accuracy of a space input or a hover input to a touch screen panel and miniaturizing a touch screen panel driving circuit.

The technical problems of the present invention are not limited to the above-mentioned technical problems, and other technical problems which are not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a semiconductor device including: a touch screen panel including a plurality of hover sensors for performing self capacitance sensing; A TX driver for providing a plurality of driving signals to the touch screen panel; An RX sensing unit sensing a hover input from the touch screen panel; And an encoding unit encoding the plurality of drive signals provided from the TX driver and providing the encoded plurality of drive signals to the touch screen panel.

Wherein the touch screen panel includes a first line extending in a first direction and a second line extending in a second direction so as to intersect the first line and the TX driver is coupled to the touch screen panel via the first line, And the RX sensing unit may sense the hover input from the hover sensor through the first line.

The semiconductor device may further include a switch array that receives the plurality of drive signals from the TX driver and distributes the plurality of drive signals to a part of the lines of the first line.

Wherein the plurality of drive signals include a first drive signal and a second drive signal, and the encoding unit generates the first drive signal and the second drive signal so that the signs of the amplitude values of the first drive signal and the second drive signal are different from each other, 2 < / RTI > drive signal.

Wherein the plurality of drive signals include a first drive signal and a second drive signal and the encoding unit is configured to generate the first drive signal and the second drive signal in such a manner that the first drive signal and the second drive signal have different phases, Can be encoded.

The encoding unit may encode the first driving signal and the second driving signal such that the phases of the first driving signal and the second driving signal are opposite to each other.

The encoding unit may encode the first driving signal and the second driving signal such that the voltage level of the second driving signal is the lowest voltage level when the voltage level of the first driving signal is the highest voltage level.

And a plurality of switches for encoding the first driving signal and the second driving signal between the TX driver and the RX sensing unit.

Wherein the encoding unit encodes the plurality of drive signals in a first method at a first time point and encodes the plurality of drive signals in a second method different from the first method at a second point in time after the first point in time can do.

Wherein the encoding unit encodes the first driving signal among the plurality of driving signals so that the amplitude of the first driving signal is a positive value at the first time point according to the first method, And the amplitude of the first driving signal may be a negative value.

Wherein the encoding unit encodes the first driving signal among the plurality of driving signals so that the phase of the first driving signal becomes a first phase at the first point in time according to the first method, And may encode the first driving signal so that the phase of the first driving signal is a second phase different from the first phase.

The first phase and the second phase may be opposite to each other.

The voltage level of the first driving signal may be the highest voltage level at the first time point and the voltage level of the first driving signal may be the lowest voltage level at the second time point.

The TX driver, the RX sensing unit, and the encoding unit may be integrated into a single read-out integrated circuit (ROIC).

According to another aspect of the present invention, there is provided a semiconductor device including: a touch screen panel including a plurality of hover sensors for performing self capacitance sensing; A TX driver for providing a single driving signal to the touch screen panel; An RX sensing unit sensing a hover input from the touch screen panel; And a decoder for decoding a sensing signal for the hover input sensed using a single driving signal into a plurality of sensing signals and providing the decoded sensing signals to the RX sensing unit.

The plurality of sensing signals may include a first sensing signal and a second sensing signal, and the phase of the first sensing signal may be different from the phase of the second sensing signal.

The first phase and the second phase may be opposite to each other.

The semiconductor device may further include a plurality of switches for decoding the plurality of sensing signals between the TX driver and the RX sensing unit.

According to another aspect of the present invention, there is provided a method of operating a semiconductor device including generating a first driving signal and a second driving signal for driving a touch screen panel including a plurality of hover sensors, A first code is assigned to the first driving signal by performing a first encoding on the first driving signal, a second code is applied to the second driving signal, and a second code different from the first code is given to the second driving signal And providing a touch screen panel with a first drive signal to which a first code is assigned and a second drive signal to which a second code is assigned.

Wherein applying the first code to the first drive signal includes making the amplitude of the first drive signal a positive value and applying the second code to the second drive signal comprises: Such that the amplitude of the signal is negative.

Wherein applying the first code to the first drive signal includes making the phase of the first drive signal a first phase and applying the second code to the second drive signal comprises: And to cause the phase of the signal to be a second phase different from the first phase.

The first phase and the second phase may be opposite to each other.

Wherein applying the first code to the first drive signal comprises causing the voltage level of the first drive signal to be at a maximum voltage level, and applying the second code to the second drive signal includes applying the second code to the second Such that the voltage level of the drive signal is at the minimum voltage level.

The method of operating the semiconductor device may further include sensing the hover input sensed by the hover sensor using the first drive signal and the second drive signal.

According to another aspect of the present invention, there is provided a method of operating a semiconductor device including generating a first driving signal and a second driving signal for driving a touch screen panel including a plurality of hover sensors, A first code and a second code are applied to a first driving signal and a second driving signal, respectively, and a first sensing signal is applied to a hover input from a touch screen panel using a first driving signal and a second driving signal, A second code and a third code are respectively applied to the first drive signal and the second drive signal at a second point in time after the first point of time and the hori- zontal input from the touch screen panel is performed using the first drive signal and the second drive signal, Lt; / RTI >

And the first code and the second code are given to the first drive signal and the second drive signal, respectively, the first code and the second code are generated so that the signs of the amplitude values of the first drive signal and the second drive signal are different from each other, 2 codes, respectively.

The first code and the second code are given to the first drive signal and the second drive signal, respectively, and the first code and the second code are set so that the phases of the first drive signal and the second drive signal are different from each other. Respectively.

The first phase and the second phase may be opposite to each other.

The first code and the second code are provided to the first drive signal and the second drive signal, respectively. The first code and the second code are generated so that the voltage levels of the first drive signal and the second drive signal are different from each other. Respectively.

The voltage level of the first driving signal may be a maximum voltage level, and the voltage level of the second driving signal may be a minimum voltage level.

The details of other embodiments are included in the detailed description and drawings.

1 is a schematic view illustrating a touch screen panel according to an embodiment of the present invention.
2 is a schematic view for explaining a semiconductor device according to an embodiment of the present invention.
3 is a schematic view for explaining the operation of the semiconductor device according to an embodiment of the present invention.
4 is a schematic diagram for explaining a circuit for driving a semiconductor device according to an embodiment of the present invention.
5 is a schematic diagram for explaining encoding a driving signal according to an embodiment of the present invention.
6 is a time flow diagram illustrating the operation of the semiconductor device according to an embodiment of the present invention.
7 is a schematic diagram for explaining hover sensing according to an embodiment of the present invention.
8 is a schematic view for explaining a semiconductor device according to another embodiment of the present invention.
9 is a schematic view for explaining a circuit for driving a semiconductor device according to another embodiment of the present invention.
10 to 12 are exemplary semiconductor systems to which the semiconductor device according to the embodiments of the present invention can be applied.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. The relative sizes of layers and regions in the figures may be exaggerated for clarity of illustration. Like reference numerals refer to like elements throughout the specification.

One element is referred to as being "connected to " or" coupled to "another element, either directly connected or coupled to another element, One case. On the other hand, when one element is referred to as being "directly connected to" or "directly coupled to " another element, it does not intervene another element in the middle. Like reference numerals refer to like elements throughout the specification. "And / or" include each and every combination of one or more of the mentioned items.

It is to be understood that when an element or layer is referred to as being "on" or " on "of another element or layer, All included. On the other hand, a device being referred to as "directly on" or "directly above " indicates that no other device or layer is interposed in between.

Although the first, second, etc. are used to describe various elements, components and / or sections, it is needless to say that these elements, components and / or sections are not limited by these terms. These terms are only used to distinguish one element, element or section from another element, element or section. Therefore, it goes without saying that the first element, the first element or the first section mentioned below may be the second element, the second element or the second section within the technical spirit of the present invention.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

1 is a schematic view illustrating a touch screen panel according to an embodiment of the present invention.

1, a touch screen panel 10 according to an embodiment of the present invention includes a first line extending in a first direction, e.g., a horizontal line, and a second line extending in a second direction to cross the first line. For example, a vertical line. On the other hand, the touch screen panel 10 includes a plurality of hover sensors for performing self capacitance sensing, which are formed by the first line and the second line. Here, the hover sensor is an element for sensing a space input (i.e., a hover input) generated by movement of a user's body or object in a space on the touch screen panel 10 without touching the touch screen panel 10. [

The lines arranged adjacent to each other along the first direction of the touch screen panel 10 may operate as TX lines to which driving signals of the touch screen panel 10 are applied or as RX lines that receive charges from the hover sensors . For example, the TX driving signal TX1 and the RX sensing signal RX1 may be applied to the first line extending in the horizontal direction in FIG. 1, and the TX driving signal TX2 may be applied to the first line immediately below. And the RX sensing signal RX2 may be applied. That is, the touch screen panel 100 may apply a TX drive signal to at least a portion of the first line and read the RX sensing signal through the at least a portion of the line.

In some embodiments of the present invention, the touch screen panel 10 may be, but is not limited to, an electrostatic touch screen.

Meanwhile, in some embodiments of the present invention, the touch screen panel 10 may be an attachment type, a cover window integral type or a display integrated type. For example, the touch screen panel 10 may include a lower substrate including a pixel array and an upper substrate such as a glass substrate, and the touch screen panel 10 may include a lower substrate of the display panel, Can be disposed between the substrates. Alternatively, for example, in the case of the cover window integral type, the touch screen panel 10 may be formed by patterning the transparent electrode deposited on the cover window. Alternatively, for example, in the case of a display-integrated type, the touch screen panel 10 may be formed by patterning a transparent electrode on the display itself.

 2 is a schematic view for explaining a semiconductor device according to an embodiment of the present invention.

2, a semiconductor device according to an embodiment of the present invention includes a touch screen panel 10, a TX driver 30, an RX sensing unit 40, and an encoding unit 50. Referring to FIG. In some embodiments of the present invention, the semiconductor device may further include a switch array 20.

The TX driver 30 provides one or more driving signals to the touch screen panel 10. 1, the TX driver 30 drives one or more driving signals to the touch screen panel 10 through the first line extending in the horizontal direction in the touch screen panel 10, or a part of the first line .

The RX sensing unit 40 senses the hover input from the touch screen panel 10. Referring also to FIG. 1, the RX sensing unit 40 may sense the hover input from the hover sensor through a first line extending horizontally in the touch screen panel 10, or a part of the first line.

The encoding unit 50 encodes one or more driving signals provided from the TX driving unit 30. [ The encoding unit 50 also provides the encoded one or more drive signals to the touch screen panel 10. The details of the encoding unit 50 encoding one or more drive signals will be described later in detail.

The switch array 20 may receive one or more drive signals from the TX driver 30 and may distribute one or more drive signals to some of the first lines. In particular, the switch array 20 may include a plurality of multiplexers for distributing one or more drive signals to the first line.

In some embodiments of the present invention, the TX driver 30, the RX sensing unit 40, and the encoding unit 50 may be integrated into a single read-out integrated circuit (ROIC).

3 is a schematic view for explaining the operation of the semiconductor device according to an embodiment of the present invention.

3, hovering capacitances CH1 and CH2 are formed between the user's body, such as a finger or an object, and the touch screen panel 10 in the self-capacitance sensing. On the other hand, parasitic capacitances CP1 and CP2 may exist in the lines of the touch screen panel 10 where hover sensing is performed. Here, the hovering capacitance is formed through air having a low dielectric constant so that its capacity is very low, and the hover sensing is performed on a sensing signal having a small variation width.

The first driving signal TX1 and the second driving signal TX2 generated by the first driving signal generating unit 100 and the second driving signal generating unit 200 may be supplied to the touch screen panel 10, and the RX sensing unit 110 receives the sensing signal acquired by the hover sensor. On the other hand, the offset calibration block 120 performs the hover sensing and adjusts the offset of the driving signal for the next hover sensing.

FIG. 4 is a schematic diagram for explaining a circuit for driving a semiconductor device according to an embodiment of the present invention, and FIG. 5 is a schematic diagram for explaining encoding of a driving signal according to an embodiment of the present invention.

4, a semiconductor device according to an embodiment of the present invention includes a TX driver 30 and an RX sensing unit 40 for encoding first through fourth driving signals TX1, TX2, TX3, TX4, And a plurality of switches. Specifically, the switches S11, S12, S13, and S14 are provided at one ends of the first to fourth drive signal generators 100, 102, 104, and 106 to which the drive signals are supplied. The switches S21, S22, S23, and S24 are provided between the lines of the touch screen panel 10 and the RX sensing unit 40 where the hover sensor is formed.

Referring to FIG. 5, the encoding unit 50 converts the first to fourth drive signals TX1, TX2, TX3, and TX4 using the switches S11, S12, S13, S14, S21, S22, S23, ≪ / RTI > Specifically, the encoding unit 50 converts the first to fourth drive signals TX1, TX2, TX3, and TX4 into ('1', '1', '1', '0' The first to fourth drive signals TX1, TX2, TX3 and TX4 are set to (1 ', 1', 0 ', 1') at the time point T2, TX2, TX3, and TX4 to the first to fourth driving signals TX1, TX2, TX3, and TX4 to (1 ', 0', '1' TX3, TX4) can be encoded into ('0', '1', '1', '1').

Here, the encoding of the driving signal may mean setting the amplitude value or phase of the driving signal of at least one of the plurality of driving signals, for example, the first to fourth driving signals TX1, TX2, TX3 and TX4, have. Specifically, in some embodiments of the present invention, the encoding unit 50 generates the first to third drive signals TX1, TX2, TX3 among the first to fourth drive signals TX1, TX2, TX3, TX4, TX2, TX3, TX4 so that the amplitude value of the fourth drive signal TX4 becomes a negative value and only the amplitude value of the fourth drive signal TX4 is a negative value.

Meanwhile, in some embodiments of the present invention, among the first to fourth driving signals TX1, TX2, TX3, and TX4, the encoding unit 50 outputs the fourth driving signal TX4, The first to fourth driving signals TX1, TX2, TX3 and TX4 may be encoded so as to be different from the phases of the driving signals TX1, TX2 and TX3. For example, the encoding unit 50 may be configured so that the phase of the fourth drive signal TX4 is opposite to the phase of the first to third drive signals TX1, TX2, and TX3, that is, To fourth driving signals TX1, TX2, TX3, TX4.

Meanwhile, the encoding unit 50 has the highest voltage level of the first to third drive signals TX1, TX2, and TX3 among the first to fourth drive signals TX1, TX2, TX3, and TX4, It is possible to encode the first to fourth driving signals TX1, TX2, TX3 and TX4 so that only the voltage level of the fourth driving signal TX4 becomes the lowest voltage level.

5, the encoding unit 50 converts the first to fourth drive signals TX1, TX2, TX3, and TX4 to different methods at respective timings T1, T2, T3, and T4 ≪ / RTI > Specifically, after the fourth driving signal TX4 is encoded to '0' at the first time point T1, the fourth driving signal TX4 is encoded to '1' at the subsequent second time point T2 .

Accordingly, the amplitude value of the fourth driving signal TX4 becomes negative at the first time point T1 and the amplitude value of the fourth driving signal TX4 becomes positive at the second time point T2. On the other hand, the phase of the fourth driving signal TX4 at the first time point T1 may be different from the phase of the fourth driving signal TX4 at the second time point T2. On the other hand, at the first time point T1, the voltage level of the fourth drive signal TX4 becomes the highest voltage level, and at the second time point T2, the voltage level of the fourth drive signal TX4 becomes the lowest voltage level .

 6 is a time flow diagram illustrating the operation of the semiconductor device according to an embodiment of the present invention.

Referring to FIG. 6, the first to fourth driving signal generators 100, 102, 104 and 106 include first to fourth driving signals (hereinafter referred to as " first to fourth driving signals ") for driving the touch screen panel 10 including a plurality of hover sensors TX1, TX2, TX3, TX4).

Specifically, the encoding unit 50 may perform a first encoding on the first drive signal TX1 to give a first code (i.e., '+') to the first drive signal TX1. Meanwhile, the encoding unit 50 may perform a fourth encoding on the fourth drive signal TX4 to give a fourth code (i.e., '-') to the fourth drive signal TX4. The first through fourth drive signals TX1, TX2, TX3 and TX4 encoded respectively drive the hover sensors of the touch screen panel 10 in the driving period D1. Then, in the sensing period S1, the RX sensing unit 40 performs sensing and acquires a result Q1. At the same time, in the sensing period S1, the offset calibration block 120 adjusts the offset of the driving signal for subsequent hover sensing.

Next, the encoding unit 50 gives a '+' code to the first, second and fourth driving signals TX1, TX2 and TX4, and a '-' code to the third driving signal TX3 can do. The first through fourth driving signals TX1, TX2, TX3 and TX4 thus encoded respectively drive the hover sensors of the touch screen panel 10 in the driving period D2. Then, in the sensing period S2, the RX sensing unit 40 performs sensing and acquires the result Q2.

As noted above, the '+' code and the '-' code may relate to the amplitude value, phase or voltage level, etc. of the drive signal. For example, the voltage level of the first driving signal TX1 to which the '+' code is applied may be the highest voltage level VDD, and the voltage level of the fourth driving signal TX4 to which the '-' May be the lowest voltage level (VSS). This voltage level can be adjusted to the voltage level (VCM) by the offset calibration block in the sensing period (S1, S2, S3, S4).

In FIG. 6, this process can be repeated to obtain the results (Q1, Q2, Q3, Q4).

7 is a schematic diagram for explaining hover sensing according to an embodiment of the present invention.

Referring to FIG. 7, the relationship between the results (Q1, Q2, Q3, Q4) obtained in FIG. 6 and the hovering capacitances (CH1, CH2, CH3, CH4) formed between the finger or object and the touch screen panel 10 Able to know. Specifically, the first to fourth driving signals TX1, TX2, TX3 and TX4 are ('+', '+', ' Encoded as '(', '-', '+'), ('+', '-', '+', '+' Since the hover sensing is performed four times and each result (Q1, Q2, Q3, Q4) is thus obtained, a value four times the hovering capacitance CH1 can correspond to Q1 + Q2 + Q3 - Q4 , And the value that is four times the hovering capacitance (CH2) may correspond to Q1 + Q2 - Q3 + Q4. Similarly, a value that is four times the hovering capacitance CH3 may correspond to Q1 - Q2 + Q3 + Q4, and a value that is four times the hovering capacitance CH4 may correspond to - Q1 + Q2 + Q3 + Q4 .

According to various embodiments of the present invention, it is possible to reduce the calibration capacitance and at the same time to produce an advantageous effect of increasing the resolution of the hover sensing by about four times. In addition, the sensing accuracy in the self capacitance sensing can be improved and the size of the touch screen channel driving circuit can be reduced.

8 is a schematic view for explaining a semiconductor device according to another embodiment of the present invention.

Referring to FIG. 8, a semiconductor device according to another embodiment of the present invention includes a touch screen panel 10, a TX driver 30, an RX sensing unit 40, and a decoding unit 60. In some embodiments of the present invention, the semiconductor device may further include a switch array 20.

The difference from the embodiment of FIG. 2 is that the TX driver 30 provides a single driving signal to the touch screen panel 10. The present embodiment differs from the embodiment shown in FIG. 2 in that the semiconductor device according to the present embodiment includes a decoding section 60.

The decoding unit 60 decodes the sensed hover input sensing signal into a plurality of sensed signals by using a single driving signal generated from the TX driver 30. The decoding unit 60 may also provide a plurality of sensing signals to the RX sensing unit 40. In some embodiments of the invention, the phase of at least one of the plurality of sensing signals may be different or opposite from the other of the plurality of sensing signals.

9 is a schematic view for explaining a circuit for driving a semiconductor device according to another embodiment of the present invention.

9, a semiconductor device according to another embodiment of the present invention includes a plurality of switches S31 to S38 for decoding a plurality of sensing signals between a TX driver 30 and an RX sensing unit 40 . That is, the decoding unit 60 can decode a plurality of sensing signals using the switches S31 to S38.

In some embodiments of the present invention, all or a portion of the components of the semiconductor device according to various embodiments of the present invention described so far can be implemented as one or more touch chips. For example, the touch chip, together with the TX driver 30 and the RX sensing unit 40, encodes one or more driving signals provided from the TX driver 30 and transmits the encoded one or more driving signals to the touch screen panel 10, And an encoding unit 50 for providing the encoded data to one chip.

Further, in some embodiments of the present invention, the touch chip may be implemented as one integrated chip together with a DDI (Display Driver IC). Specifically, the integrated chip includes a first area and a second area, wherein a semiconductor device for driving the touch screen panel 10 is implemented in accordance with various embodiments of the present invention, The DDI driving the display may be implemented in the second area electrically connected to the display area. In particular, in the case of a display-integrated touch screen panel, the area of the integrated chip can be reduced by implementing both the functions of the touch chip and the functions of the DDI.

10 to 12 are exemplary semiconductor systems to which a semiconductor device according to embodiments of the present invention and an operation method thereof can be applied.

Fig. 10 shows a tablet PC 1200, Fig. 11 shows a notebook 1300, and Fig. 12 shows a smartphone 1400. Fig. The semiconductor device and the operation method of the semiconductor device according to the embodiments of the present invention can be used for such a tablet PC 1200, notebook computer 1300, smart phone 1400 and the like.

It will also be apparent to those of ordinary skill in the art that the semiconductor device and the method of operation of the semiconductor device according to some embodiments of the present invention may be applied to other integrated circuit devices not illustrated. That is, the tablet PC 1200, the notebook PC 1300, and the smartphone 1400 are only examples of the semiconductor device and the semiconductor device according to the present embodiment, but the present invention is not limited thereto. In some embodiments of the invention, the semiconductor system may be a computer, an Ultra Mobile PC (UMPC), a workstation, a netbook, a Personal Digital Assistant (PDA), a portable computer, a wireless phone, A mobile phone, an e-book, a portable multimedia player (PMP), a portable game machine, a navigation device, a black box, a digital camera, A digital audio recorder, a digital audio recorder, a digital picture recorder, a digital picture player, a digital video recorder, ), A digital video player, or the like.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is to be understood that the 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.

10: touch screen panel 20: switch array
30: TX driver 40, 110: RX sensing unit
50: encoding section 60: decoding section
100, 102, 104, and 106:
120: Offset calibration block

Claims (20)

A touch screen panel including a plurality of hover sensors for performing self capacitance sensing;
A TX driver for providing a plurality of driving signals to the touch screen panel;
An RX sensing unit sensing a hover input from the touch screen panel; And
And an encoding unit that encodes the plurality of drive signals provided from the TX driver and provides the encoded plurality of drive signals to the touch screen panel. The method according to claim 1,
Wherein the touch screen panel includes a first line extending in a first direction and a second line extending in a second direction to intersect the first line,
Wherein the TX driver provides the plurality of driving signals to the touch screen panel through the first line,
And the RX sensing unit senses the hover input from the hover sensor via the first line. 3. The method of claim 2,
And a switch array which receives the plurality of drive signals from the TX driver and distributes the plurality of drive signals to a part of the lines of the first line. The method according to claim 1,
Wherein the plurality of drive signals include a first drive signal and a second drive signal,
Wherein the encoding unit encodes the first drive signal and the second drive signal such that signs of the amplitude values of the first drive signal and the second drive signal are different from each other. The method according to claim 1,
Wherein the plurality of drive signals include a first drive signal and a second drive signal,
Wherein the encoding unit encodes the first driving signal and the second driving signal so that the first driving signal and the second driving signal have different phases. 6. The method of claim 5,
Wherein the encoding unit encodes the first drive signal and the second drive signal such that the phase of the first drive signal is opposite to that of the second drive signal. 6. The method of claim 5,
Wherein the encoding unit encodes the first drive signal and the second drive signal such that the voltage level of the second drive signal is the lowest voltage level when the voltage level of the first drive signal is the highest voltage level. 6. The method of claim 5,
And a plurality of switches for encoding the first drive signal and the second drive signal between the TX driver and the RX sensing unit. The method according to claim 1,
The encoding unit may include:
At a first point in time, encoding the plurality of drive signals in a first method,
And encodes the plurality of drive signals in a second method different from the first method at a second point in time after the first point in time. 10. The method of claim 9,
The encoding unit may include:
At the first point in time, encoding the first drive signal among the plurality of drive signals so that the amplitude of the first drive signal is a positive value,
And at the second time point, the amplitude of the first drive signal is a negative value according to the second method. 10. The method of claim 9,
The encoding unit may include:
At the first time point, encoding the first driving signal among the plurality of driving signals to be in a first phase according to the first method,
And at the second time point, the phase of the first driving signal is a second phase different from the first phase according to the second method. 12. The method of claim 11,
Wherein the first phase and the second phase are opposite to each other. 12. The method of claim 11,
The voltage level of the first driving signal becomes the highest voltage level at the first time point,
And the voltage level of the first driving signal is the lowest voltage level at the second time point. The method according to claim 1,
Wherein the TX driver, the RX sensing unit, and the encoding unit are integrated into a single read-out integrated circuit (ROIC). A touch screen panel including a plurality of hover sensors for performing self capacitance sensing;
A TX driver for providing a single driving signal to the touch screen panel;
An RX sensing unit sensing a hover input from the touch screen panel; And
And a decoder for decoding the sensing signal for the hover input sensed using the single driving signal into a plurality of sensing signals and providing the decoded sensing signals to the RX sensing unit. 16. The method of claim 15,
Wherein the plurality of sensing signals include a first sensing signal and a second sensing signal,
Wherein the phase of the first sensing signal is different from the phase of the second sensing signal. 17. The method of claim 16,
Wherein the first phase and the second phase are opposite to each other. 16. The method of claim 15,
And a plurality of switches for decoding the plurality of sensing signals between the TX driver and the RX sensing unit. Generating a first driving signal and a second driving signal for driving a touch screen panel including a plurality of hover sensors,
Performing a first encoding on the first drive signal to give a first code to the first drive signal,
Performing a second encoding on the second drive signal to give a second code different from the first code to the second drive signal,
And providing the touch panel with the first drive signal to which the first code is assigned and the second drive signal to which the second code is assigned. Generating a first driving signal and a second driving signal for driving a touch screen panel including a plurality of hover sensors,
A first code and a second code are respectively given to the first drive signal and the second drive signal at a first point in time,
Sensing the hover input from the touch screen panel using the first drive signal and the second drive signal,
The second code and the third code are respectively given to the first drive signal and the second drive signal at a second point in time after the first point,
And sensing a second input of the hover input from the touch screen panel using the first drive signal and the second drive signal.

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