KR20190070178A - Touch display device, touch system, touch circuit, and pen sensing method - Google Patents

Abstract

Embodiments of the present invention relate to a touch display device, touch system, touch circuit, pen, and pen sensing method and, more specifically, to a touch display device for allowing an uplink signal corresponding to a control signal for pen touch sensing to be stably transmitted from a touch display device to a pen, touch system, touch circuit, pen, and pen sensing method. Accordingly, the pen touch may be more quickly and accurately sensed.

Description

TOUCH DISPLAY APPARATUS, TOUCH SYSTEM, TOUCH CIRCUIT, AND PEN SENSING METHOD [0002]

The present invention relates to a touch display device, a touch system, a touch circuit, a pen and a pen sensing method.

BACKGROUND ART [0002] As an information society develops, a demand for a touch display device for displaying an image has increased in various forms. Recently, various display devices such as a liquid crystal display device, a plasma display device, and an organic light emitting display device have been utilized.

Such a display device provides a touch-based input method that allows a user to easily input information or commands intuitively and conveniently without using a conventional input method such as a button, a keyboard, and a mouse.

In order to provide such a touch-based input method, it is necessary to grasp the presence or absence of a user's touch and accurately detect touch coordinates.

In addition to fingers, pen touch technology has also been developed in response to increased demand for sophisticated pen touch input. Among the pen touch technology, there is a technique of sensing the pen while the display device and the pen transmit signals.

In such a pen touch technology, since the driving operation between the display device and the pen is complicated and the interlocking operation between the display device and the pen is required, there are a lot of cases in which the operation is problematic.

In view of the foregoing, it is an object of embodiments of the present invention to provide a touch display device, a touch system, a touch circuit, a pen, and a pen sensing method that allow the interlocking operation between the touch display device and the pen to be normally performed.

It is another object of embodiments of the present invention to provide a touch display device, a touch system, a touch circuit, a pen and a pen sensor (hereinafter, referred to as " touch sensor ") that allows a control signal Method.

It is another object of embodiments of the present invention to provide a touch display device, a touch system, a touch circuit, a pen, and a pen sensing method capable of performing pen touch sensing more quickly and accurately.

It is still another object of embodiments of the present invention to provide a touch display device, a touch system, a touch circuit, a pen and a pen sensing method that allow an uplink signal to be reliably transmitted from a touch display device to a pen even in a situation where noise occurs I have to.

It is still another object of embodiments of the present invention to provide a touch display device, a touch system, a touch circuit, a pen, and a pen sensing method which enable a pen to be searched more accurately and quickly.

It is still another object of embodiments of the present invention to provide a touch display device, a touch system, a touch circuit, a pen, and a pen sensing method that enable more precise and quick retrieval of a searched pen position or various information.

In one aspect, embodiments of the present invention provide a touch display device including a panel including a plurality of touch electrodes and a touch circuit for supplying uplink signals to at least one of the plurality of touch electrodes included in the panel .

The uplink signal may be transmitted to the pen through one or more of the plurality of touch electrodes included in the panel.

When the downlink signal is not output from the pen to the panel within a predetermined time after the uplink signal is supplied to at least one of the plurality of touch electrodes, the touch circuit outputs the uplink signal to at least one of the plurality of touch electrodes included in the panel As shown in FIG.

The interval between the supply period in which the uplink signal is first supplied to at least one of the plurality of touch electrodes included in the panel in the start period of the first display frame period and the start period of the second display frame period after the first display frame period Intervals may be different from each other until the supply period in which the uplink signal is first supplied to at least one of the plurality of touch electrodes included in the panel.

The number of times the uplink signal is supplied to at least one of the plurality of touch electrodes included in the panel within the first display frame period and the number of times the uplink signal is included in the panel within the second display frame period after the first display frame period The number of times of supply to one or more of the plurality of touch electrodes may be different from each other.

The uplink signal re-supplied to at least one of the plurality of touch electrodes included in the panel may have a signal state different from the uplink signal supplied to at least one of the plurality of touch electrodes included in the panel before re-supply.

The touch circuit counts the number of times that the uplink signal is re-supplied to at least one of the plurality of touch electrodes included in the panel, and when the counted number reaches the preset number of re-supply limit, have.

According to another aspect of the present invention, there is provided a method of driving a touch panel, comprising: supplying an uplink signal to at least one of a plurality of touch electrodes included in a panel; supplying an uplink signal to at least one of the plurality of touch electrodes included in the panel; Receiving a downlink signal output from the pen through at least one of a plurality of touch electrodes included in the panel, and sensing the pen based on the downlink signal.

When the downlink signal is not output from the pen to the panel within a predetermined time after the uplink signal is supplied to at least one of the plurality of touch electrodes included in the panel, The method further comprising the step of supplying again to at least one of the touch electrodes.

The steps described above can be performed when the pen is searched and then operated in the pen mode to sense the position or data of the pen.

The pen sensing method is a method in which, when the pen is operated in a pen search mode for searching for a pen before being searched, an uplink signal is transmitted to at least one of a plurality of touch electrodes included in a panel after a first time at a start time of a first display frame period A step of supplying a signal and determining whether or not a downlink signal is received through the panel, changing a pen search mode to a pen mode when a downlink signal is received through at least one of a plurality of touch electrodes included in the panel And supplying the uplink signal to one or more of the plurality of touch electrodes included in the panel after a second time from the start time point of the second display frame period after the first display frame period if the downlink signal is not received through the panel .

If the number of times that the downlink signal is determined to have not been received through the panel is less than or equal to a preset threshold number, the second time is kept equal to the first time, and the number of times that the downlink signal If the preset threshold number of times is exceeded, the second time may be changed from the first time.

According to another aspect of the present invention, there is provided a display device including: a signal supply unit for supplying an uplink signal to at least one of a plurality of touch electrodes included in a panel; and a signal supply unit for supplying the uplink signal to at least one of the plurality of touch electrodes And a sensing data output unit for outputting the pen sensing data based on the downlink signal when the downlink signal output from the pen is received through one or more of the plurality of touch electrodes included in the panel have.

If the downlink signal is not output from the pen to the panel within a predetermined time after the uplink signal is supplied to at least one of the plurality of touch electrodes included in the panel, And can be retransmitted to one or more of the electrodes.

According to another aspect of the present invention, there is provided a touch display device including a touch panel including a touch panel including a plurality of touch electrodes and a touch circuit for supplying uplink signals to at least one of the plurality of touch electrodes, The present invention can provide a touch system including a pen to which an uplink signal is transmitted from at least one of a plurality of touch electrodes included in a panel.

When the downlink signal is not output from the pen to the panel within a predetermined time after the uplink signal is supplied to at least one of the plurality of touch electrodes included in the panel, the touch circuit outputs the uplink signal to a plurality of touches And can be fed back to one or more of the electrodes.

In another aspect, embodiments of the present invention provide a touch display device including a panel including a plurality of touch electrodes and a touch circuit supplying an uplink signal to at least one of the plurality of touch electrodes included in the panel can do.

The uplink signal may be transmitted to the pen through one or more of the plurality of touch electrodes included in the panel.

The touch circuit can supply the uplink signal to the panel at each of the first point of view, the second point of view, and the third point of view.

The interval between the first and second points may be different from the interval between the second point and the third point.

The interval between the first and second points of time may be shorter than the interval between the second point and the third point of time.

Between the first point and the second point of time, the downlink signal is output from the pen to the panel, and after the second point or the third point, the downlink signal is outputted from the pen to the panel.

In yet another aspect, embodiments of the present invention may provide a pen that interacts with a touch display device, wherein the pen includes one or more pen tips in contact with or proximate to the panel of the touch display device, A receiving unit that receives the uplink signal supplied to at least one of the touch electrodes through one or more pen tips, and a transmitting unit that outputs the downlink signal to the panel through one or more pen tips in response to the uplink signal .

The receiving section of the pen can re-receive the uplink signal at a timing earlier than a predetermined timing when the uplink signal is not recognized.

As described above, according to the embodiments of the present invention described above, it is possible to provide a touch display device, a touch system, a touch circuit, a pen, and a pen sensing method that enable the interlocking operation between the touch display device and the pen to be normally performed.

According to the embodiments of the present invention, a touch display device, a touch system, a touch circuit, a pen, and a pen sensing method (hereinafter, referred to as " Can be provided.

According to the embodiments of the present invention, it is possible to provide a touch display device, a touch system, a touch circuit, a pen, and a pen sensing method that can perform pen touch sensing more quickly and accurately.

According to the embodiments of the present invention, it is possible to provide a touch display device, a touch system, a touch circuit, a pen, and a pen sensing method that allow an uplink signal to be reliably transmitted from a touch display device to a pen even in a situation where noise occurs have.

According to the embodiments of the present invention, it is possible to provide a touch display device, a touch system, a touch circuit, a pen, and a pen sensing method which enable a pen to be searched more accurately and quickly.

According to the embodiments of the present invention, it is possible to provide a touch display device, a touch system, a touch circuit, a pen, and a pen sensing method that enable more accurate and quick retrieval of the searched pen position or various information.

1 is a diagram illustrating a touch system according to embodiments of the present invention.
2 is a view illustrating a display part in a touch display device according to embodiments of the present invention.
FIG. 3 is a diagram illustrating a touch sensing part for mutual-capacitance-based touch sensing in the touch display device according to the embodiments of the present invention.
FIG. 4 is a diagram illustrating a touch sensing part for self-capacitance-based touch sensing in the touch display device according to the embodiments of the present invention.
5 is a view illustrating an example of a touch display device according to embodiments of the present invention.
Fig. 6 is an exemplary diagram showing the timings of the display driving period and the touch driving period in the touch display device according to the embodiments.
FIG. 7 is an exemplary diagram showing display driving periods and touch driving periods in which one frame time is time-divided in the touch display device according to the embodiments of the present invention.
8 is a diagram illustrating a touch driving timing independent of a display driving timing in a touch display apparatus according to embodiments of the present invention.
9 is a diagram illustrating a driving operation between the touch display device and the pen according to the embodiments of the present invention.
10 is a diagram illustrating a state transition for an operation mode of a pen sensing method according to embodiments of the present invention.
11 is a driving timing diagram for the pen mode in the touch system according to the embodiments of the present invention.
12 is a driving timing diagram for the pen mode when noise occurs in the touch system according to the embodiments of the present invention.
13 is a diagram illustrating a first noise avoidance algorithm of the touch system according to embodiments of the present invention.
Figs. 14 and 15 are drive timing diagrams for the pen mode when applying the first noise avoidance algorithm in the touch system according to the embodiments of the present invention. Fig.
16 is a driving timing diagram for the pen search mode when noise occurs in the touch system according to the embodiments of the present invention.
17 is a driving timing chart for a pen search mode when noise is generated and a second noise avoiding algorithm is applied in the touch system according to the embodiments of the present invention.
18 is a flowchart of a second noise avoidance algorithm of the touch system according to embodiments of the present invention.
19 and 20 are diagrams showing the relationship between the waveform of the noise and the beacon in the touch system according to the embodiments of the present invention.
21 is a flowchart of a pen sensing method according to embodiments of the present invention.
Figure 22 is a flow diagram of the pen mode operating steps in accordance with embodiments of the present invention.
23 is a flow chart of the pen search mode operating steps according to embodiments of the present invention.
24 is a block diagram of a touch circuit according to embodiments of the present invention.
Figure 25 is a more detailed view of a touch circuit according to embodiments of the present invention.
26 is a view of a pen according to embodiments of the present invention.

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

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

1 is a diagram illustrating a touch system according to embodiments of the present invention.

The touch system according to embodiments of the present invention may include a touch display device 10 and a pen 20 interlocked with the touch display device 10.

The touch display device 10 according to embodiments of the present invention not only provides a video display function for displaying an image but also can provide a touch sensing function by a finger and the pen 20 or the like.

The 'pen 20' includes an active pen, which is a touch tool having a signal transmission / reception function or capable of interlocking with the touch display device 10 or having its own power, a signal transmission / A passive pen which is a touch tool without a power source, and the like.

Here, the touch tool refers to not only a finger but also any object that can touch the screen in place of the finger, and may be referred to as a touch object or a touch pointer.

In the following, the fingers are considered to represent passive touch tools such as passive pens and the pen 20 can be considered to represent active touch tools such as active pens. Here, the pen 20 may be referred to as a stylus, a stylus pen, or an active stylus pen.

The touch display device 10 according to embodiments of the present invention may be, for example, a television (TV), a monitor, or a mobile device such as a tablet or a smart phone.

The touch display device 10 according to embodiments of the present invention may be, for example, a television (TV), a monitor, or a mobile device such as a tablet or a smart phone.

The touch display device 10 according to embodiments of the present invention may include a display part for providing a video display function and a touch sensing part for touch sensing.

Hereinafter, a structure of a display part and a touch sensing part of the touch display device 10 will be briefly described with reference to FIGS. 2 to 5. FIG.

2 is a view illustrating a display part in the touch display device 10 according to the embodiments of the present invention. 3 and 4 are views showing two types of touch sensing parts in the touch display device 10 according to the embodiments of the present invention. 5 is a view illustrating an example of the implementation of the touch display device 10 according to the embodiments of the present invention.

2, a display part of the touch display device 10 according to embodiments of the present invention includes a display panel 110, a data driving circuit 120, a gate driving circuit 130, (140), and the like.

The display panel 110 includes a plurality of data lines DL and a plurality of gate lines GL disposed therein and a plurality of data lines DL and a plurality of gate lines GL defined by the plurality of data lines DL and the plurality of gate lines GL. And subpixels SP are arranged.

The data driving circuit 120 supplies a data voltage to a plurality of data lines DL to drive a plurality of data lines DL.

The gate driving circuit 130 sequentially supplies the scan signals to the plurality of gate lines GL to drive the plurality of gate lines GL.

The display controller 140 supplies various control signals DCS and GCS to the data driving circuit 120 and the gate driving circuit 130 to control the operations of the data driving circuit 120 and the gate driving circuit 130 .

The display controller 140 starts scanning in accordance with the timing implemented in each display frame, switches input image data inputted from the outside according to the data signal format used by the data driving circuit 120, (Data), and controls the data driving at a suitable time according to the scan.

The display controller 140 may be a timing controller used in a conventional display technology or a control device including a timing controller to perform other control functions.

The display controller 140 may be implemented as a separate component from the data driving circuit 120, or may be implemented as an integrated circuit together with the data driving circuit 120.

Meanwhile, the data driving circuit 120 may be implemented by including at least one source driver integrated circuit.

Each source driver integrated circuit may include a shift register, a latch circuit, a digital to analog converter (DAC), an output buffer, and the like.

Each source driver integrated circuit may further include an analog to digital converter, as the case may be.

The gate driving circuit 130 may be implemented by including at least one gate driver integrated circuit.

Each gate driver integrated circuit may include a shift register, a level shifter, and the like.

The data driving circuit 120 may be located only on one side (e.g., on the upper side or the lower side) of the display panel 110 or on both sides of the display panel 110 : Upper side and lower side).

The gate driving circuit 130 may be located only on one side (e.g., the left side or the right side) of the display panel 110 and on both sides of the display panel 110 depending on the driving method, For example, left and right).

Meanwhile, the display panel 110 may be various types of display panels such as a liquid crystal display panel, an organic light emitting display panel, and a plasma display panel.

The touch display device 10 can sense a touch input by a finger and / or the pen 20 through a capacitance-based touch sensing technique.

3 and 4, the touch display device 10 may include a touch panel TSP having touch electrodes TE and a touch circuit 300 for driving the touch panel TSP. .

The touch display device 10 may provide a mutual-capacitance-based touch sensing function for sensing a touch input by measuring a capacitance formed between two touch electrodes Tx_TE and Rx_TE or a change thereof, It is possible to provide a self-capacitance-based touch sensing function for sensing a touch input by measuring a capacitance or a change thereof formed for each electrode TE.

Referring to FIG. 3, in order to perform mutual capacitance-based touch sensing, first touch electrode lines (T1 to T5, also referred to as touch driving lines) to which a touch driving signal is applied and a touch sensing signal The second touch electrode lines (R1 to R6, also referred to as touch sensing lines) to be sensed are arranged in an intersecting manner.

Each of the first touch electrode lines T1 to T5 may be a bar type electrode extending in the horizontal direction and each of the second touch electrode lines R1 to R6 may be a vertical And may be a bar-shaped electrode.

3, each of the first touch electrode lines T1 to T5 is formed by electrically connecting first touch electrodes Tx_TE (also referred to as touch driving electrodes) arranged in the same row. . Each of the second touch electrode lines R1 to R6 may be formed by electrically connecting second touch electrodes Rx_TE (also referred to as touch sensing electrodes) arranged in the same column.

Each of the first touch electrode lines T1 to T5 may be electrically connected to the touch circuit 300 through one or more signal lines SL. Each of the second touch electrode lines R1 to R6 may be electrically connected to the touch circuit 300 through one or more signal lines SL.

Referring to FIG. 4, a plurality of touch electrodes TE may be disposed on the touch panel TSP for self-capacitance-based touch sensing.

Each of the plurality of touch electrodes TE may receive a touch driving signal and sense a touch sensing signal.

Each of the plurality of touch electrodes TE may be electrically connected to the touch circuit 300 through one or more signal lines SL.

Hereinafter, for convenience of explanation, it is assumed that the touch display device 10 provides a self-capacitance based touch sensing method and the touch panel (TSP) is designed as shown in FIG. 4 for self-capacitance based touch sensing .

The shape of one touch electrode TE shown in Figs. 3 and 4 can be variously designed only by way of example.

In addition, the size of a region where one touch electrode TE is formed may correspond to a size of a region where one subpixel is formed.

Alternatively, the size of the area where one touch electrode TE is formed may be larger than the size of the area where one sub pixel is formed. In this case, one touch electrode TE may be overlapped with two or more data lines and two or more gate lines.

For example, the size of a region where one touch electrode TE is formed may correspond to a size of several to several tens of sub-pixel regions.

The touch panel TSP may be an external type (also referred to as an add-on type) manufactured separately from the display panel 110 and coupled to the display panel 110, (Also referred to as an in-cell type or an on-cell type).

5, the touch circuit 300 includes at least one touch IC (not shown) for supplying a touch driving signal to the touch panel TSP and detecting (receiving) the touch sensing signal from the touch panel TSP And a touch controller (TCR) for detecting the presence / absence and / or position of the touch input using the touch sensing signal detection result of the touch IC (TIC).

The one or more touch ICs (TIC) included in the touch circuit 300 may be implemented as discrete components or as a single component.

One or more touch ICs (TICs) included in the touch circuitry 300 may be integrated into one or more integrated integrated circuits (SRIC) together with one or more source driver integrated circuits (SDIC) .

That is, the touch display device 10 may include one or more integrated integrated circuits (SRIC), each integrated integrated circuit (SRIC) including a touch IC (TIC) and a source driver integrated circuit (SDIC).

As described above, the integrated implementation of the touch IC (TIC) for touch driving and the source driver integrated circuit (SDIC) for data driving is a built-in type in which the touch panel TSP is embedded in the display panel 110, TE and the signal lines SL connected to the data lines DL are arranged in parallel with the data lines DL, it is possible to effectively perform the touch driving and the data driving.

Meanwhile, when the touch panel TSP is embedded in the display panel 110, the touch electrode TE can be variously formed.

In the case where the touch display device 100 is implemented as a liquid crystal display device or the like, the touch electrode TE may be formed by, for example, applying a touch driving signal or detecting a touch sensing signal during a touch driving period for touch sensing, And may be blocked common electrodes to which a common voltage is applied during the display driving period for display.

In this case, during the display driving period, the touch electrodes TE are electrically connected to each other within the touch circuit 300, and common voltages can be commonly applied.

A part or the whole of the touch electrodes TE is selected in the touch circuit 300 and the selected one or more touch electrodes TE are touched from the touch IC TIC of the touch circuit 300 A driving signal may be applied, or a touch sensing signal may be detected by the touch IC (TIC) of the touch circuit 300. [

In addition, each touch electrode TE may have a plurality of slits (also referred to as a hole) to form an electric field with the pixel electrodes in a plurality of overlapping sub-pixels.

When the touch display device 10 is implemented as an organic light emitting display device, the plurality of touch electrodes TE and the plurality of signal lines SL are disposed on the front surface of the display panel 110, On a common electrode (e.g., a cathode electrode) that is formed on the substrate.

The common electrode disposed on the entire surface of the display panel 110 may be formed of an anode electrode (corresponding to a pixel electrode) of an organic light emitting diode (OLED) in each subpixel SP and a cathode electrode Cathode electrode, and the common voltage may be the cathode voltage.

In this case, each of the plurality of touch electrodes TE may be in the form of a tubular electrode without an open region. At this time, each of the plurality of touch electrodes TE may be a transparent electrode for light emission in the sub-pixels SP.

Alternatively, each of the plurality of touch electrodes TE may be a mesh-type electrode having a plurality of open regions. At this time, in each of the plurality of touch electrodes TE, each open region may correspond to a light emitting region (e.g., a region where a part of the anode electrode is located) of the subpixel SP.

On the other hand, when the panel driving signal is supplied to the touch electrodes TE and the signal lines SL during the touch driving period (touch sensing period), the touch electrodes TE and the signal lines The same or corresponding signal as the panel driving signal may be applied to other electrodes and signals other than the panel driving signal SL. Here, the panel driving signal may be a touch driving signal for sensing the touch input by the finger and / or the pen 20 or for recognizing the pen information of the pen 20. [

For example, during the touch driving period, a panel driving signal or a corresponding signal may be applied to all the data lines or a part of the data lines.

As another example, during the touch driving period, a panel driving signal or a corresponding signal may be applied to all the gate lines or a part of the gate lines.

As another example, during the touch driving period, a panel driving signal or a corresponding signal may be applied to all the touch electrodes TE.

In the embodiments, the panel driving signal may refer to all signals applied to the display panel 110 including the touch panel TSP, the display panel 110, or the touch panel TSP.

On the other hand, in relation to the implementation and placement of the integrated circuit, for example, in the touch display device 10, an integrated integrated circuit (SRIC) is mounted on a film, both ends of which are connected to the touch panel TSP and the printed circuit board .

As described above, the integrated on-chip integrated circuit (SRIC) of the COF (Chip On Film) type includes a touch controller (TCR) electrically connected to the touch panel (TSP) As shown in FIG.

The integrated integrated circuit (SRIC) may be implemented as a chip on glass (COG) type arranged on a touch panel (TSP).

Meanwhile, the at least one touch IC (TIC) and the touch controller (TCR) of the touch circuit 300 may be integrated into one component.

6 is an exemplary diagram showing the timings of the display driving period DP and the touch driving period TP of the touch display device 10 according to the embodiments of the present invention. FIG. 7 is a block diagram of a touch display device 10 according to an embodiment of the present invention. In FIG. 7, 16 display driving periods DP1 through DP16 and 16 touch driving periods TP1 through TP16, Fig.

Referring to FIG. 6, the touch display device 10 according to the exemplary embodiment of the present invention performs a display drive for displaying an image during a predetermined display driving period DP, / RTI > and / or the touch input by the pen (20).

The display driving period (DP) and the touch driving period (TP) may be the same or overlapped with each other in time, or may be a temporally separated period.

If the display driving period DP and the touch driving period TP are the same in time, the display driving and the touch driving can be performed at the same time.

In the following description, the display driving period DP and the touch driving period TP are separated in terms of time. In this case, the display drive period DP and the touch drive period TP can be alternated.

As described above, when the display driving period DP and the touch driving period TP are alternately and temporally separated, the touch driving period TP may be a blank period during which display driving is not performed.

The touch display apparatus 10 generates a synchronization signal Tsync swinging at a high level and a low level to identify or control the display driving period DP and the touch driving period TP through the synchronization signal Tsync. That is, the synchronization signal Tsync is a drive timing control signal that defines the touch drive period TP.

For example, the high level interval (or low level interval) of the synchronization signal Tsync may correspond to the display driving period DP, and the low level interval (or the high level interval) of the synchronization signal Tsync may correspond to the touch driving May correspond to the period TP.

Meanwhile, with respect to a method of allocating the display driving period DP and the touch driving period TP within one display frame period, for example, one display frame period is divided into one display driving period DP and one touch driving period The display driving is progressed during one display driving period DP and the touch input by the finger and / or pen 20 during one touch driving period TP corresponding to the blank period, The touch operation may be performed to sense the touch.

As another example, one display frame period is time-divided into two or more display driving periods (DP) and two or more touch driving periods (TP). The display drive for one display frame may proceed during two or more display drive periods DP within one display frame period. During the two or more touch driving periods (TP) corresponding to the blank period within one display frame period, touch driving for sensing the touch input by the finger and / or the pen 20 all at once or twice or more is performed Or a touch operation may be performed to abnormally sense the touch input by the finger and / or the pen 20 in a part of the screen.

On the other hand, when one display frame period is time-divided into two or more display driving periods (DP) and two or more touch driving periods (TP), two or more blank periods Each is referred to as "LHB (Long Horizontal Blank)".

Here, the touch driving performed during two or more LHBs in one display frame period is referred to as "LHB driving ".

Referring to FIG. 7, one display frame period may be divided into 16 display driving periods DP1 through DP16 and 16 touch driving periods TP1 through TP16.

In this case, the 16 touch operation periods TP1 to TP16 may correspond to 16 LHBs (LHB # 1 to LHB # 16).

8 is a diagram showing a touch driving timing independent of the display driving timing in the touch display device 10 according to the embodiments of the present invention.

6 and 7, the touch display device 10 according to the embodiments of the present invention divides one display frame period into one or more display driving periods and one or more touch driving periods, and performs display driving and touch driving Can be alternated.

Alternatively, referring to FIG. 8, the touch display device 10 according to the embodiments of the present invention can perform touch driving independently of the display driving period. In this case, the display driving and the touch driving may be performed at different time zones, but the display driving and the touch driving may be simultaneously performed.

Therefore, although the synchronization signal Tsync of FIGS. 6 and 7 serves to distinguish the display driving period from the touch driving period, the synchronization signal Tsync of FIG. 8 can distinguish only the touch driving period.

Referring to FIG. 8, n touch driving periods (L1 to Ln, n is a natural number) may be one touch frame period. Here, the touch frame period may mean a period in which the touch by the finger and / pen 20 can be sensed once in the entire screen area.

The synchronization signal Tsync in FIG. 8 is exemplified as a high-level section being the touch driving period (L1 to Ln, n is a natural number).

The display driving may proceed in the low level period of the synchronization signal Tsync of FIG. In this case, the display driving and the touch driving of FIGS. 6 and 7 correspond to the method of time-divisionally proceeding.

Hereinafter, the synchronization signal Tsync of FIG. 8 will be described as an example.

In the following description, the display driving may be continuously performed irrespective of the touch driving periods L1 to Ln indicated by the synchronizing signal Tsync in FIG. 8, or may be performed in a low level interval of the synchronizing signal Tsync in FIG. 8 It may proceed. That is, the display driving and the touch driving may be performed simultaneously or may be time-divided.

In addition, in the touch driving periods (L1 to Ln), touch driving for sensing a touch by a finger may proceed or touch driving for sensing a touch by the pen (20) may proceed.

In addition, the touch panel TSP may be embedded in the display panel 110 or may exist outside the display panel 110. Hereinafter, for the sake of convenience of explanation, it is described that the touch panel TSP is embedded in the display panel 110, and the display panel 110 is also simply referred to as the panel 110. [

9 is a diagram showing a driving operation between the touch display device 10 and the pen 20 according to the embodiments of the present invention.

The touch display apparatus 10 displays various information for controlling the operation of the pen 20 or an uplink signal including various information necessary for driving the pen 20 To the pen (20).

More specifically, the touch circuit 300 of the touch display apparatus 100 transmits various kinds of information for controlling the driving of the pen 20 or an uplink signal including various information necessary for driving the pen 20, To at least one of the plurality of touch electrodes (TE) included in the panel (110).

Accordingly, the pen 20 adjacent to the panel 110 can receive the uplink signal through the pen tip. That is, the pen 20 may receive the uplink signal through at least one of the plurality of touch electrodes TE included in the panel 110. [

The pen 20 outputs a downlink signal indicating a position, a tilt (pen tilt), or various kinds of additional information or the like with respect to the pen 20 in response to the uplink signal transmitted from the touch display device 10 do.

The downlink signal output from the pen 20 may be applied to the touch electrode TE of the panel 110. [

The touch circuit 300 of the touch display device 10 receives the downlink signal output from the pen 20 via the touch electrode TE and outputs the position of the pen 20, And various additional information.

Here, the uplink signal may include, for example, a beacon or a ping signal.

The beacon is a control signal for controlling the operation of the pen 20 or informing the pen 20 of necessary information by the touch display device 10, and may include various information necessary for driving the pen.

For example, the beacon may include panel information (e.g., panel status information, panel identification information, panel type information such as an in-cell type and the like), panel drive mode information (e.g., mode identification information such as a pen search mode, One of the characteristics information of the downlink signal (e.g., frequency, number of pulses, etc.), driving timing related information, multiplexer driving information, power mode information (e.g., LHB information that is not driven by the panel and pen for power consumption reduction) And may further include information for driving synchronization between the display panel 110 and the pen 20.

The ping signal may be a control signal for synchronization of the downlink signal.

The additional information that may be included in the downlink signal may include at least one of a pressure, pen ID, button information, battery information, information for information error check and correction, and the like.

10 is a diagram illustrating a state transition for an operation mode of a pen sensing method according to embodiments of the present invention.

10, the operation mode of the pen sensing method according to embodiments of the present invention includes a pen search mode (Pen Search Mode) for searching for the pen 20 contacting or adjacent to the panel 110, A pen mode for obtaining information on the position of the pen 20 and information on the pen 20 through signal transmission between the panel 110 and the pen 20 after the pen 20 is searched .

11 is a driving timing diagram for the pen mode in the touch system according to the embodiments of the present invention.

11 shows a downlink signal output from the pen 20 and various signals (including an uplink signal) applied to the panel 110 in accordance with a predetermined drive timing in the pen mode operation.

In the example of Fig. 11, the first display frame period may correspond to the first pen touch frame period. And the second display frame period may correspond to the second pen touch frame period.

Each of the first pen touch frame period and the second pen touch frame period may include sixteen touch driving periods (L1 to L16). Here, the pen touch frame period is a period during which both the finger and the pen can be sensed, and may be referred to as a touch frame period.

In each of the first pen touch frame period and the second pen touch frame period, a beacon, which is one of the uplink signals, may be transmitted from the panel 110 to the pen 20 at least once.

The beacon can be transmitted in any touch driving period among the sixteen touch driving periods (L1 to L16) included in the first pen touch frame period and the second pen touch frame period.

For example, in the first touch-driving period (L1) out of the 16 touch-driving periods (L1 to L16) included in each of the first pen touch frame period and the second pen touch frame period, (20).

In another example, the first touch driving period L1 and the ninth touch driving period L9 among the sixteen touch driving periods L1 to L16 included in the first pen touch frame period and the second pen touch frame period, respectively, A beacon may be transmitted from the panel 110 to the pen 20.

On the other hand, a beacon can be transmitted only in one pen touch frame period of the first pen touch frame period and the second pen touch frame period.

When the beacon is transmitted from the panel 110 to the pen 20, the pen 20 can output a downlink signal in a predetermined touch driving period according to a predetermined protocol in response to a beacon.

The downlink signal output from the pen 20 may be a downlink signal that allows the touch display device 10 to sense the position of the pen 20, The downlink signal may be a downlink signal that allows data to be sensed. Here, the data may include various information of the pen 20, such as a pressure, pen ID, button information, battery information, information for information error check and correction, and the like.

The downlink signal output from the pen 20 may be applied to one or more of the plurality of touch electrodes TE included in the panel 110.

Meanwhile, the sixteen touch driving periods (L1 to L16) included in the first pen touch frame period and / or the second pen touch frame period include at least one touch driving period (E.g., L2 to L3, L5 to L7, L9 to L11, L13 to L15).

The pen 20 can output the corresponding downlink signal in accordance with the touch driving period (for example, L2 to L3, L5 to L7, L9 to L11, and L13 to L15) allocated for pen sensing.

When the downlink signal outputted from the pen 20 is a downlink signal for sensing the position of the pen 20, the downlink signal may be a signal consisting of pulses periodically swinging, When the downlink signal is a downlink signal for sensing data of the pen 20, the downlink signal may be a signal made up of aperiodic pulses representing the corresponding data.

The sixteen touch driving periods (L1 to L16) included in the first pen touch frame period and / or the second pen touch frame period include one or more touch driving periods (for example, L4, L8, L12, L16).

As described above, when the downlink signal is output from the pen 20 according to the pen sensing timing defined in the protocol, the touch circuit 300 receives the downlink signal through the panel 110, A pen sensing process can be performed based on the signal.

Here, the pen sensing process may include at least one of a process of sensing the position of the pen 20 and a process of sensing data (Data) of the pen 20.

In accordance with the finger sensing timing defined in the protocol, the touch circuit 300 supplies a touch driving signal to at least one touch electrode TE of the panel 110, receives a sensing signal from the panel 110, A finger sensing process for sensing a touch by a finger can be performed.

12 is a driving timing diagram for the pen mode when noise occurs in the touch system according to the embodiments of the present invention.

The drive timing and the pen mode operation in Fig. 12 are the same as the drive timing in Fig. 11 and the pen mode operation.

Meanwhile, referring to FIG. 12, when noise occurs in the touch driving period (L1) during which the beacon is transmitted during the first pen touch frame period, beacons may be distorted or damaged due to noise.

Here, the noise means all the influence that the pen 20 distorts the beacon. Noise can be generated inside or outside one or more of the panel 110, the pen 20 and the touch IC (TIC). In addition to this, noise can be caused by various causes at various locations. In addition, the noise may be generated at random or constant.

As such, if the beacon is distorted or damaged by noise, the possibility that the pen 20 will not correctly recognize the beacon increases. Thus, if the pen 20 fails to recognize the beacon, the pen 20 can not generate the downlink signal.

Therefore, when there is one touch-driving period (L1) in which the beacon is transmitted within the first pen touch frame period, the touch IC (TIC) of the touch circuit 300 of the touch display device 10 receives the touch- The user can not receive the downlink signal, and the pen 20 can not be sensed during the first touch frame.

In this case, the touch IC (TIC) generates the beacon again during the second pen touch frame period, and pen sensing can be performed only when the downlink signal is normally received.

In the worst case, when the noise generation period and the beacon transmission period coincide, the pen sensing may not be done forever.

Although the beacon is distorted or damaged by noise, the beacon may be any kind of uplink signal transmitted from the touch display device 10 to the pen 20 in addition to the beacon.

FIG. 13 is a diagram illustrating a first noise avoidance algorithm of the touch system according to the embodiments of the present invention. FIG. 14 and FIG. 15 are diagrams illustrating a case where, in the touch system according to the embodiments of the present invention, , And a driving timing chart for the pen mode.

13, the touch system according to embodiments of the present invention can provide a first noise avoidance algorithm for preventing an uplink signal, such as a beacon, from being distorted or damaged by noise during a pen mode operation .

The first noise avoidance algorithm determines whether the uplink signal such as a beacon is correctly recognized in the pen 20 when the touch circuit 300 operates in the pen mode. If it is determined that the pen 20 fails to recognize the signal, And transmits the uplink signal to the pen 20 more stably by retransmitting the uplink signal such as a beacon.

If the downlink signal is not received within a predetermined time after the touch IC (TIC) supplies the uplink signal to the panel 110, the touch controller (TCR) or the touch IC (TIC) It can be judged as failed.

When the downlink signal is not output from the pen 20 to the panel 110 within a predetermined time (for example, 3L, 4L, etc.) after supplying the uplink signal to the panel 110, Resetting the pen protocol associated with the touch, and supplying the uplink signal to the panel 110 again.

That is, if the touch IC TIC does not receive the downlink signal within a predetermined time (for example, 3L, 4L, etc.) after supplying the uplink signal to the panel 110, (20). ≪ / RTI >

14, after the touch IC (TIC) supplies the uplink signal to the panel 110 in the L1 section overlapping with the first display frame period and does not receive the downlink signal until the L3 section , The pen protocol related to the pen touch may be reset and the uplink signal may be supplied to the panel 110 again in the period L4.

If no noise is generated when the touch IC TIC re-supplies the uplink signal to the panel 110 in the section L4, the pen 20 can recognize the uplink signal supplied to the panel 110 normally, The downlink signal can be normally generated.

Therefore, the first pen touch frame period starts from the L4 section.

In the example of FIG. 14, after the touch circuit 300 supplies the uplink signal to the panel 110 in the L1 section, it determines whether to receive the downlink signal, determines whether to re-supply the uplink signal, The retransmission time required until the uplink signal is re-supplied to the panel 110 is set as a preset value and the difference between the supply period L1 of the uplink signal and the re-supply period L4 ).

This retransmission time can be set to various values (e.g., 2L, 3L, 4L, 5L, etc.). The example of Fig. 15 is a case where the retransmission time is set to 4L.

On the other hand, the touch IC (TIC) can generate the reset signal RST in order to reset the pen protocol related to the pen touch.

Depending on the reset of the pen protocol, all of the driving procedures defined by the pen protocol can be initialized and resumed.

That is, when the pen protocol is reset, the pen touch frame is restarted.

Thus, according to the first noise avoidance algorithm, by resetting the pen protocol, the pen touch frame period may not coincide with the display frame period. In addition, the length of the pen touch frame period can also be varied.

The first noise avoidance algorithm described above can be used to determine that the pen 20 fails to recognize the uplink signal and retransmit the uplink signal so that the noise generation period is avoided and the uplink signal is transmitted to the pen 20 in a stable . ≪ / RTI > Accordingly, the pen 20 can normally recognize the uplink signal.

According to the above-described first noise avoidance algorithm, the display frame period and the pen touch frame period can be unsynchronized.

Therefore, in the interval from the start period of the first display frame period to the supply period of supplying the uplink signal to the panel 110 for the first time and the start period of the second display frame period after the first display frame period, May be different from each other to the supply period in which the panel 110 is first supplied.

14, the interval from the start time (L1) of the first display frame period to the supply period (L1) where the uplink signal is first supplied to the panel (110) The intervals from the start period L1 of the two display frame periods to the supply period L4 of supplying the first uplink signals to the panel 110 may be different from each other.

15, the interval from the start point (L1) of the first display frame period to the supply period (L1) during which the uplink signal is first supplied to the panel (110) The intervals from the start period L1 of the two display frame periods to the supply period L5 when the uplink signals are first supplied to the panel 110 may be different from each other.

According to the above description, the pen touch frame period is not synchronized with the display frame period, so that the touch driving can be performed simultaneously with the display drive or in a time-sharing manner. That is, the touch driving can be performed independently of the display driving.

The number of times that the uplink signal is supplied to the panel 110 in the first display frame period and the number of times that the uplink signal is supplied to the panel 110 according to whether or not the first noise avoiding algorithm described above is performed, And the number of times the uplink signal is supplied to the panel 110 within the second display frame period after the first display frame period may be different from each other.

For example, assuming that noise does not occur during the first display frame period and noise occurs during the second display frame period, the number of times the uplink signal is supplied to the panel 110 within the first display frame period is And the number of times the uplink signal is supplied to the panel 110 within the second display frame period.

As described above, the number of times the uplink signal is supplied to the panel 110 during each display frame period may be the same or different depending on whether the uplink signal is retransmitted or not according to the presence or absence of noise.

According to the first noise avoidance algorithm described above, the uplink signal re-supplied to the panel 110 may have a signal state different from the uplink signal supplied to the panel 110 before re-supply.

For example, an uplink signal re-supplied to one or more of the plurality of touch electrodes TE included in the panel 110 may be transmitted to the plurality of And may have a signal state different from that of the uplink signal supplied to at least one of the touch electrodes TE.

For example, an uplink signal re-supplied to one or more of the plurality of touch electrodes TE included in the panel 110 may be transmitted between the panel 110 and the pen 20, And a plurality of touch electrodes (TE) included in the plurality of touch electrodes (TE).

For example, an uplink signal re-supplied to one or more of the plurality of touch electrodes TE included in the panel 110 may be included in the panel 110 before the re- And may have a signal state different from that of the uplink signal supplied to at least one of the plurality of touch electrodes TE.

That is, although the uplink signal supplied to the panel 110 before re-supply has a damaged or distorted signal state due to noise, the noise is avoided by the first noise avoidance algorithm, The uplink signal may have a signal state that is not corrupted or distorted by noise.

On the other hand, the downlink failure situation in which the touch circuit 300 does not receive the downlink signal occurs when the uplink signal such as a beacon is damaged or distorted due to noise and the pen 20 fails to recognize the uplink signal, Or may be a normal situation in which the pen 20 is moved away from the panel 110 and the pen 20 to be sensed is missing.

That is, the downlink failure situation may be an abnormal situation or a normal situation.

Nevertheless, it is unnecessary for the touch circuit 300 to retransmit the uplink signal for each downlink failure situation.

13, the touch circuit 300 counts a downlink failure count (DFS) corresponding to the number of times the uplink signal is re-supplied to the panel 110, When the number of times of re-supply (i.e., the counted downlink failure count value DFS) becomes the predetermined re-supply limiting count TH1, the pen 20 disappears and the downlink failure situation It is recognized that the link signal is not received and it is possible to interrupt the re-supply of the uplink signal.

According to the above description, the touch circuit 300 is configured such that the downlink failure situation (downlink signal non-reception state) is changed into an abnormal state in which the downlink signal is not received due to distortion or damage of the uplink signal due to noise, It is possible to distinguish the normal situation in which the pen 20 is not received and the downlink signal is not received, thereby preventing frequent retransmission of unnecessary and excessive uplink signals.

16 is a driving timing diagram for the pen search mode when noise occurs in the touch system according to the embodiments of the present invention.

Referring to FIG. 16, when operating in the pen search mode, an uplink signal such as a beacon may be supplied to the panel 110 in a predetermined touch driving period (L1, L9) within the first and second display frame periods.

Here, the number or location of the touch driving period in which the uplink signal such as a beacon is supplied to the panel 110 may be variously changed.

16, when the touch circuit 300 operates in the pen search mode, the touch circuit 300 performs a touch operation except for the touch driving periods L1 and L9 in which an uplink signal such as a beacon is supplied to the panel 110 During the driving periods L2 to L8 and L10 to L16, a driving signal for finger sensing is applied to the panel 110 by the touch electrodes TE to sense the touch by the fingers . As described above, the operation of sensing the touch by the finger with respect to the entire screen area is referred to as finger full scan.

When the touch circuit 300 operates in the pen search mode, the touch operation is performed in the touch driving periods (L2 to L8, L10) except for the touch driving periods (L1, L9) in which the uplink signals such as beacons are supplied to the panel To L16, when a downlink signal is generated in the pen 20, it is recognized through the touch electrode TE that the pen 20 is present.

Referring to FIG. 16, when operating in the pen search mode, noise may occur during the touch driving periods L1 and L9 during which the uplink signals such as beacons are supplied to the panel 110 in the first and second display frame periods have.

Even in this case, the uplink signal such as a beacon is distorted or damaged by noise, so that the pen 20 can not normally recognize the uplink signal such as a beacon and can not generate the downlink signal.

Therefore, even though the pen 20 exists, the touch circuit 300 does not recognize the existence of the pen. As a result, the user can not perform the input processing using the pen 20.

This situation can be further exacerbated when the period in which the uplink signal such as a beacon is transmitted is equal to the noise occurrence period.

Thus, the present embodiments can provide a second noise avoidance algorithm that allows an uplink signal such as a beacon to be stably transmitted to the pen 20 while avoiding noise in the pen search mode.

17 is a driving timing chart for the pen search mode when noise is generated and applied to the second noise avoiding algorithm in the touch system according to the embodiments of the present invention, Figure 2 is a flow chart of a second noise avoidance algorithm of the system.

The second noise avoidance algorithm is a method in which when the pen 20 is not searched for a predetermined time after the touch circuit 300 supplies the uplink signal such as a beacon to the panel 110 in the pen search mode, Is an algorithm for avoiding noise by changing the beacon generation timing by assuming that the beacon recognition failure of the pen 20 due to noise is failed.

17, in the pen search mode, when the pen 20 is not searched for a predetermined time, the touch circuit 300 assumes that this case is a beacon recognition failure of the pen 20 by noise, The period during which the beacon is supplied to the panel 110 can be shifted to the periods L2 and L10 in the periods L1 and L9.

In this case, a beacon is generated between the touch driving period in which the finger pull scan is performed (L1 to L3 to L9 and L11 to L16 overlapping with L2 to L8, L10 to L16 and the second display frame period overlapping with the first display frame period) The touch driving periods L1, L9, L2 and L10 supplied to the panel 110 can be positioned.

Referring to FIG. 18, the touch display apparatus 10 starts the pen search mode (S1810) and performs full scan sensing (S1820).

The touch display apparatus 10 determines whether the pen 20 is present according to the execution of the full scan sensing (S1830).

If it is determined that the pen 20 is present, the touch display device 10 changes the pen search mode to the pen mode and ends the pen search mode (S1840, S1850).

On the other hand, the touch display device 10 can know the position of the pen 20 when the pen search mode is operated. Therefore, in the pen mode operation, only a certain region can be locally sensed based on the position of the pen 20 that is recognized.

If the touch display device 10 does not determine that the pen 20 is present, the touch display device 10 increases the count value No_Pen_Count which means that there is no pen (S1860).

The touch display device 10 determines whether the count value exceeds the threshold value NTH (S1870).

If the count value does not exceed the threshold value (NTH) as a result of the determination, the touch display device 10 performs the process from step S1820 again.

If the count value exceeds the threshold value NTH, the touch display apparatus 10 shifts the beacon interval to the right (S1880) and resets the count value (S1890).

The noise avoiding algorithm including the first noise avoiding algorithm and the second noise avoiding algorithm described above has a common point in which the timing at which the uplink signals such as beacons are supplied to the panel 110 is changed.

Hereinafter, the noise avoidance algorithm according to embodiments of the present invention will be briefly described again.

The touch display device 10 according to the embodiments of the present invention includes a panel 110 in which the pen 20 contacts or approaches and a touch circuit 300 that supplies an uplink signal to the panel 110 .

The uplink signal may be transmitted to the pen 20 through the panel 110.

The touch circuit 300 may supply the uplink signal to the panel 110 at each of the first time point (first time period), the second time point (second time period), and the third time point (third time period).

The interval between the first and second points may be different from the interval between the second point and the third point.

14, which is an example of the first noise avoidance algorithm, the L1 and L4 periods overlapping with the first display frame period are the first and second points of time when the uplink signal is supplied to the panel 110, And the L4 period overlapping with the period is the third time point when the uplink signal is supplied to the panel 110. [

According to this, the interval between the first and second time points is 3L (L1 to L4), and the interval between the second and third time points is 16L (L4 to L4), and the two intervals are different from each other.

The interval (e.g., 3L) between the first and second time points may be shorter than the interval between the second and third time points (e.g., 16L).

17, which is an example of the second noise avoidance algorithm, the L1 and L9 periods overlapping with the first display frame period are the first and second points of time when the uplink signal is supplied to the panel 110, And the L2 period overlapped with the period is the third time point when the uplink signal is supplied to the panel 110. [

According to this, the interval between the first and second time points is 8L (L1 to L9), and the interval between the second and third time points is 9L (L9 to the next L2), and the two intervals are different from each other.

The interval (e.g., 8L) between the first and second time points may be shorter than the interval between the second and third time points (e.g., 9L).

Therefore, according to the two noise avoidance algorithms according to the embodiments of the present invention, an uplink signal such as a beacon can be stably transmitted to the pen 20 without the influence of noise.

According to the two noise avoidance algorithms according to the embodiments of the present invention, an uplink signal such as a beacon is transmitted from the pen 20 to the panel 110 between the first point of time and the second point of time when the signal is supplied to the panel 110 The downlink signal may not be output.

A downlink signal may be output from the pen 20 to the panel 110 at a second point of time or a third point of time when an uplink signal such as a beacon is supplied to the panel 110.

This means that an uplink signal such as a beacon is correctly transmitted to the pen 20 after being supplied to the panel 110 at the second or third time point.

19 and 20 are diagrams showing the relationship between the waveform of the noise and the beacon in the touch system according to the embodiments of the present invention.

For example, noise can swing up and down at high frequencies (eg, 200Khz) and the magnitude of the amplitude can change. The amplitude of the noise can be repeatedly turned on and off at a frequency relatively lower than the swing frequency (eg, 200 KHz) (eg, 1 KHz).

As shown in Fig. 19, in the case where the beacon overlaps with the section where the amplitude of the noise is small, the pen 20 can recognize the beacon normally and generate the downlink signal despite the noise occurrence .

As shown in FIG. 20, when a beacon is overlapped with a section having a large amplitude of noise, the beacon is affected by noise, and the pen 20 does not recognize the beacon and generates a downlink signal I can not.

Hereinafter, the pen sensing method according to the embodiments of the present invention described above will be described again.

21 is a flowchart of a pen sensing method according to embodiments of the present invention.

Referring to FIG. 21, a pen sensing method according to embodiments of the present invention includes a step S2110 of operating in a pen search mode for contacting a pen 110 or searching for an adjacent pen 20, (S2120) operating in a pen mode for sensing the position or data of the searched pen 20 through signal transmission between the panel 110 and the pen 20 after the searched screen 20 is searched.

22 is a flowchart of a pen mode operation step (S2120) according to embodiments of the present invention.

22, in the method of sensing the pen 20 of the touch display device 10 according to the embodiments of the present invention, the step S2120 of operating in the pen mode is performed when the touch display device 10 is operated on the panel 110 A step S2210 of supplying an uplink signal to at least one of the plurality of touch electrodes TE included in the panel 110 and a step S2210 of supplying the uplink signal to at least one of the plurality of touch electrodes (S2220) of receiving a downlink signal output from the pen (20) through at least one of a plurality of touch electrodes (TE) included in the panel (110) And the step (S2230) of the device 10 sensing the pen 20 based on the downlink signal.

22, in the method of sensing the pen 20 of the touch display device 10 according to the embodiments of the present invention, the step S2120 of operating in the pen mode is performed when the touch display device 10 is moved upward If the downlink signal is not output from the pen 20 to the panel 110 within a predetermined time after the link signal is supplied to the panel 110, step S2240 of supplying the uplink signal to the panel 110 again .

23 is a flowchart of a pen search mode operation step (S2110) according to embodiments of the present invention.

Referring to FIG. 23, the pen search mode operation step S2110 according to the embodiments of the present invention includes supplying the uplink signal to the panel 110 after a first time at the start time of the first display frame period, A step S2310 of determining whether a downlink signal is received through the panel 110, a step S2320 of changing a pen search mode to a pen mode when a downlink signal is received through the panel 110, (S230) of supplying the uplink signal to the panel 110 after a second time from the start time of the second display frame period after the first display frame period when the downlink signal is not received through the first display frame period .

As described above, it is possible to increase the searchability of the pen in the pen search mode.

If the number of times (No_Pen_Count) that the downlink signal is determined to have not been received through the panel 110 is less than or equal to a preset threshold number NTH, the second time is kept equal to the first time.

If the number (No_Pen_Count) of determining that the downlink signal has not been received through the panel 110 has exceeded the predetermined threshold number NTH, i.e., the pen 20 is not searched for a predetermined time, The beacon recognition failure of the pen 20 due to the noise is considered, and the second time may be changed from the first time (see FIG. 17).

24 is a block diagram of a touch circuit 300 according to embodiments of the present invention.

24, a touch circuit 300 according to embodiments of the present invention includes a signal supply unit 2410 for supplying an uplink signal to at least one of a plurality of touch electrodes TE included in a panel 110, And a downlink signal output from the pen 20 after the uplink signal is supplied to the panel 110 is received through one or more of the plurality of touch electrodes TE included in the panel 110, And a sensing data output unit 2420 for outputting sensing data of the pen 20 based on the sensed data.

When the downlink signal is not output from the pen 20 to the panel 110 within a predetermined time after the uplink signal is supplied to the panel 110, the signal supplying unit 2410 supplies the uplink signal to the panel 110 Can be re-transmitted.

When the touch circuit 300 described above is used, it is determined that the pen 20 fails to recognize the uplink signal, and the uplink signal is retransmitted, thereby avoiding the noise generation period and transmitting the uplink signal to the pen 20 It can be transmitted reliably. Accordingly, the pen 20 can normally recognize the uplink signal.

25 is a diagram showing the touch circuit 300 according to the embodiments of the present invention in more detail.

Referring to FIG. 25, a touch IC (TIC) according to embodiments of the present invention includes a first multiplexer circuit MUX1, a sensing unit block SUB including a plurality of sensing units SU, (MUX2), an analog-to-digital converter (ADC), and the like.

The first multiplexer circuit MUX1 may comprise one or more multiplexers. The second multiplexer circuit MUX2 may comprise one or more multiplexers.

Each sensing unit SU may include a pre-amplifier (Pre-AMP), an integrator (INTG) and a sample and hold circuit (SHA).

The preamplifier (Pre-AMP) may be electrically connected to one or more touch electrodes TE by a first multiplexer circuit MUX1.

The pre-amplifier (Pre-AMP) may supply the touch driving signal to one or more touch electrodes TE connected by the first multiplexer circuit MUX1.

The preamplifier (Pre-AMP) can receive a sensing signal from one touch electrode (TE) to be sensed in one or two or more touch electrodes (TE) connectable by the first multiplexer circuit (MUX1). Here, the sensing signal may be a sensing signal for sensing a touch by a finger or a downlink signal output from the pen 20. [

The integrator (INTG) integrates the signal output from the preamplifier (Pre-AMP). The integrator INTG can be integrated into the preamplifier (Pre-AMP).

The analog-to-digital converter (ADC) can output sensing data obtained by converting the integral value output to the integrator (INTG) to a digital value toward the touch controller (TCR).

Here, the sensing data may be touch sensing data for finger touch sensing or pen sensing data for pen touch sensing.

Figure 26 is a view of a pen 20 in accordance with embodiments of the present invention.

26, the pen 20 interlocked with the touch display device 10 is connected to the pen tip of the touch display device 10, including one or more pen tips, (Uplink signal) applied to the panel 110 via the pen tip portion 2610 and outputs a downlink signal (position or tilt sensing) in response to a panel driving signal (uplink signal) A pen signal for transmitting data such as additional information, etc.) through one or more pen tips 2610, and the like.

The pen 20 also includes a battery 2630 and other peripheral devices 2640 such as a button, a communication module (e.g., Bluetooth), a display device and the like, Case 2650, and the like.

The processing section 2620 includes a pressure section 2621 for sensing the pressure (pressure) applied to the pen tip section 2610 and a receiving section 2623 for receiving the uplink signal applied to the panel 110 via one or more pen tips A transmission unit 2622 for outputting the downlink signal to the panel 110 through one or more pen tips in response to the uplink signal, a control unit 2624 for controlling the pen driving operation as a whole, and the like .

The pressure portion 2621 may be composed of, for example, a pressure sensor (e.g., MEMS) and an amplifier (Amp).

The receiving unit 2623 can sense the frequency of the electric field (i.e., the uplink signal) received from the pen tip unit 2610.

For example, the uplink signal may include a beacon, a ping signal, and the like.

The transmitting unit 2622 can output the downlink signal to the panel 110 in response to the uplink signal.

The control unit 2624 receives a signal from the receiving unit 2623 and determines the panel ID of the panel 110 and generates a communication protocol corresponding to the received signal. The controlling unit 2624 controls the timing of the transmitting unit 2622, It can receive information about it, make information about it, and control other button signals.

The control unit 2624 may be implemented as a micro control unit (MCU) 2930.

The processing unit 2620 includes a switch for performing a switching operation with the pen tip unit 2610, a frequency sensor for sensing the frequency of an electric field (panel driving signal) received through the panel 110, A pulse generator, and the like.

The control unit 2624 can select a protocol according to the beacon and control the pulse generation timing in the pulse generator according to the beacon or the ping signal.

On the other hand, in the pen 20, the pen tip portion 2610 is a portion that receives or transmits an electric field, and may include one or two or more pen tips.

If the pen tip portion 2610 includes more than one pen tip, the two or more pen tips may be spaced apart by a certain distance.

One of the two or more pen tips may be a contact pen tip in contact with the panel 110 and the remainder may be located away from the periphery of the contact pen tip as a non-contact pen tip.

A value for the distance of two or more pen tips may be included in the additional information and output as a pen signal.

The distance of the two or more pen tips is used to calculate the tilt of the pen. Therefore, it is possible to calculate the pen tilt by deliberately designing the distance between two or more pen tips.

The downlink signal output from the pen 20 according to the embodiments of the present invention is a signal defined by a protocol between the panel 110 and the pen 20 so as to enable multipen sensing, And can have the unique information of the pen 20.

The uplink signal received by the pen 20 according to the embodiments of the present invention may include a beacon including available unique information.

The uplink signal received by the pen 20 according to embodiments of the present invention may include a spread spectrum code signal.

The downlink signal output by the pen 20 according to the embodiments of the present invention may include a signal having a unique code corresponding to the unique information of the pen 20. [

The downlink signal output by the pen 20 according to the embodiments of the present invention may include a signal having a unique frequency corresponding to the unique information of the pen 20. [

If the uplink signal is not received at a predetermined timing, or if the uplink signal is not received at a predetermined timing, It is possible to re-receive the uplink signal at a timing earlier than a predetermined timing.

Using the pen 20 described above allows the touch display device 10 to accurately sense the pen 20 by stably receiving the upper link signal and recognizing it normally and transmitting the downlink signal based thereon .

According to the embodiments of the present invention described above, the touch display device 10, the touch system, the touch circuit 300, the pen 20, and the pen sensor 20, which allow the interlocking operation between the touch display device and the pen to be normally performed, Method can be provided.

According to embodiments of the present invention, the touch display device 10, the touch system, the touch circuit 300, and the like, which allow a control signal (hereinafter referred to as an uplink signal) for pen touch sensing to be stably transmitted from the touch display device to the pen, A pen 20, and a pen sensing method.

According to the embodiments of the present invention, it is possible to provide a touch display device 10, a touch system, a touch circuit 300, a pen 20, and a pen sensing method that can perform pen touch sensing more quickly and accurately.

According to the embodiments of the present invention, the touch display device 10, the touch system, the touch circuit 300, and the pen 20 (see FIG. 1), which allow the uplink signal to be stably transmitted from the touch display device to the pen even in the presence of noise, ) And a pen sensing method.

According to the embodiments of the present invention, it is possible to provide a touch display device 10, a touch system, a touch circuit 300, a pen 20, and a pen sensing method which enable a pen to be searched more accurately and quickly .

According to the embodiments of the present invention, the touch display device 10, the touch system, the touch circuit 300, the pen 20, and the pen sensor 20, which enable a more precise and quick search of the searched pen position or various information, Method can be provided.

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

10: Touch display device
20: Pen
110: Display panel
120: Data driving circuit
130: Gate driving circuit
140: Display controller
300: touch circuit

Claims (14)

A panel including a plurality of touch electrodes; And
And a touch circuit for supplying an uplink signal to at least one of the plurality of touch electrodes,
Wherein the uplink signal is transmitted to the pen through at least one of the plurality of touch electrodes,
The touch circuit includes:
If the downlink signal is not output from the pen to the panel within a predetermined time after the uplink signal is supplied to at least one of the plurality of touch electrodes,
And supplies the uplink signal to at least one of the plurality of touch electrodes.
The method according to claim 1,
The interval between the supply period in which the uplink signal is first supplied to at least one of the plurality of touch electrodes included in the panel in the start period of the first display frame period,
Wherein the interval between the uplink signal and the supply period in which the uplink signal is first supplied to at least one of the plurality of touch electrodes included in the panel in the start period of the second display frame period after the first display frame period Device.
The method according to claim 1,
The number of times that the uplink signal is supplied to at least one of the plurality of touch electrodes included in the panel within the first display frame period,
Wherein the number of times that the uplink signal is supplied to at least one of the plurality of touch electrodes included in the panel is different within a second display frame period after the first display frame period.
The method according to claim 1,
Wherein the uplink signal, which is supplied to at least one of the plurality of touch electrodes included in the panel,
And a signal state different from the uplink signal supplied to at least one of the plurality of touch electrodes included in the panel prior to re-supply.
The method according to claim 1,
The touch circuit includes:
Counting the number of times that the uplink signal is re-supplied to at least one of the plurality of touch electrodes included in the panel,
And stops the re-supply of the uplink signal when the counted number reaches a preset re-supply limit count.
A pen sensing method of a touch display device,
Supplying an uplink signal to at least one of a plurality of touch electrodes included in a panel;
Receiving a downlink signal output from the pen through at least one of the plurality of touch electrodes after supplying the uplink signal to at least one of the plurality of touch electrodes; And
Sensing the pen based on the downlink signal,
When the downlink signal is not output from the pen to the panel within a predetermined time after the uplink signal is supplied to at least one of the plurality of touch electrodes, the uplink signal is supplied again to at least one of the plurality of touch electrodes ≪ / RTI >
The method according to claim 6,
Wherein the steps are performed when operating the pen mode to sense the position or data of the pen after the pen is retrieved,
When the pen is operated in a pen search mode for searching the pen before the pen is searched,
Supplying the uplink signal to at least one of the plurality of touch electrodes after a first time at a start time of a first display frame period and determining whether a downlink signal is received through the panel;
Changing the pen search mode to the pen mode when a downlink signal is received through the panel; And
When the downlink signal is not received through the panel, the uplink signal is supplied to one or more of the plurality of touch electrodes after a second time from a start time point of a second display frame period after the first display frame period ≪ / RTI >
8. The method of claim 7,
If the number of times that the downlink signal is determined to have not been received through the panel is less than a predetermined threshold number, the second time is kept equal to the first time,
Wherein the second time is different from the first time when the number of times that the downlink signal is determined to have not been received through the panel exceeds a predetermined threshold number.
A signal supply unit for supplying an uplink signal to at least one of the plurality of touch electrodes included in the panel; And
When the downlink signal output from the pen is received through at least one of the plurality of touch electrodes after the uplink signal is supplied to at least one of the plurality of touch electrodes, the pen sensing data is output based on the downlink signal And a sensing data output unit
Wherein the signal supply unit comprises:
When the downlink signal is not output from the pen to the panel within a predetermined time after the uplink signal is supplied to at least one of the plurality of touch electrodes, the uplink signal is retransmitted to at least one of the plurality of touch electrodes Touch circuit.
In a touch system,
A touch panel including a panel including a plurality of touch electrodes and a touch circuit supplying an uplink signal to at least one of the plurality of touch electrodes; And
And a pen for transmitting the uplink signal from at least one of the plurality of touch electrodes,
The touch circuit includes:
When the downlink signal is not output from the pen to the panel within a predetermined time after the uplink signal is supplied to at least one of the plurality of touch electrodes, the uplink signal is supplied again to at least one of the plurality of touch electrodes Touch system.
A panel including a plurality of touch electrodes; And
And a touch circuit for supplying an uplink signal to at least one of the plurality of touch electrodes,
Wherein the uplink signal is transmitted to the pen through at least one of the plurality of touch electrodes,
The touch circuit includes:
Supplying the uplink signal to at least one of the plurality of touch electrodes at each of a first time point, a second time point and a third time point,
Wherein the interval between the first viewpoint and the second viewpoint is different from the interval between the second viewpoint and the third viewpoint.
12. The method of claim 11,
And the interval between the first viewpoint and the second viewpoint is shorter than the interval between the second viewpoint and the third viewpoint.
12. The method of claim 11,
The downlink signal is not output from the pen to the panel between the first viewpoint and the second viewpoint,
And the downlink signal is output from the pen to the panel after the second point of time or after the third point of time.
A pen for interlocking with a touch display device,
At least one pen tip in contact with or in proximity to the panel of the touch display device;
A receiving unit for receiving an uplink signal supplied to at least one of the plurality of touch electrodes included in the panel through the at least one pen tip; And
And a transmitter for outputting a downlink signal to the panel through the at least one pen tip in response to the uplink signal,
Wherein the receiving unit re-receives the uplink signal at a timing earlier than a predetermined timing when the uplink signal is not recognized.

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