Active pen sensing device, sensing driving method and display device

Abstract

The invention relates to an active pen sensing device, a sensing driving method and a display device. The active pen sensing device includes: a plurality of divided blocks divided into a matrix in a first direction and a second direction crossing the first direction, each divided block including a plurality of sensing units; a plurality of first sensing lines connected to the plurality of sensing units of each of the plurality of division blocks in a first direction; a plurality of second sensing lines connected to the plurality of sensing units of each of the plurality of division blocks in a second direction; and a sensing driving device connected to the plurality of first sensing lines and the plurality of second sensing lines to drive the plurality of divided blocks. The sensing driving device detects whether an active pen exists by enabling a plurality of first sensing lines, and detects coordinates of the active pen by enabling a plurality of first sensing lines and a plurality of second sensing lines when the active pen is detected. Local sensing is performed by enabling a first sensing line and a second sensing line connected to a specific partition block and a first adjacent partition block in which the active pen is located when coordinates of the active pen are detected.

Description

Technical Field

[0001] Embodiments relate to an active pen sensing device, a sensing driving method, and a display device. Background Art

[0002] Recently, display devices with an object sensing function that can recognize the touch of an object or the proximity of an object have been widely used. These display devices have various sizes, such as small electronic devices (e.g., smart phones) or large electronic devices (e.g., TVs, kiosks, or electronic whiteboards).

[0003] The display device includes a plurality of sensing units disposed on a panel. The display device displays an image on the panel and performs object sensing using the plurality of sensing units.

[0004] In addition, in various display devices, a stylus pen as an object is used as an input device. The stylus pen has the advantage of allowing more detailed input than a finger. The stylus pen is divided into a passive type stylus pen (hereinafter referred to as a passive pen) and an active type stylus pen (hereinafter referred to as an active pen). The passive pen has the disadvantage of being difficult to detect the touch position because the capacitance hardly changes at the contact point with the panel. On the other hand, since the active pen outputs its own drive signal to the contact point with the panel, it has the advantage of being easier to detect the touch position than the passive pen, and its use is increasing.

[0005] In addition, the panel requires higher and higher resolution and higher and higher driving frequency. Generally, each active pen sensing section always uses at least two sections to recognize the touch of the active pen or the approach of the active pen. That is, the driving signal is provided on the panel during the first section, and the sensing signal is received from the panel during the second section. Therefore, in order to meet the requirements of the panel, the entire section of the first section and the second section needs to be reduced.

[0006] In addition, in order to identify the touch of the active pen or the approach of the active pen, all the sensing lines provided on the panel must be enabled at all times. Here, enabling means providing an electrical signal to the corresponding sensing line. That is, for each active pen sensing section, a driving signal is provided to a plurality of first sensing lines on the panel, and a sensing signal is received from a plurality of second sensing lines on the panel. Therefore, there is a problem of increased power consumption because all sensing lines are always enabled. In particular, even if the active pen is recognized, all the sensing lines on the panel are activated, rather than locally sensing the area where the active pen is located, resulting in further increased power consumption. Summary of the invention

[0007] Embodiments are directed to solving the above-referenced and other problems.

[0008] Another object of an embodiment is to provide an active pen sensing device, a sensing driving method, and a display device that can reduce sensing time.

[0009] Another object of an embodiment is to provide an active pen sensing device, a sensing driving method, and a display device that can reduce power consumption.

[0010] Technical problems of the embodiments are not limited to those described in this item, and include technical problems that can be understood through the description of the present invention.

[0011] According to a first aspect of the embodiment, in order to achieve the above or other purposes, an active pen sensing device includes: a plurality of divided blocks divided into a matrix along a first direction and a second direction intersecting the first direction, each divided block including a plurality of sensing units; a plurality of first sensing lines connected to the plurality of sensing units of each of the plurality of divided blocks along the first direction; a plurality of second sensing lines connected to the plurality of sensing units of each of the plurality of divided blocks along the second direction; and a sensing driving device connected to the plurality of first sensing lines and the plurality of second sensing lines to drive the plurality of divided blocks, wherein the sensing driving device is configured to: detect whether an active pen exists by enabling the plurality of first sensing lines, detect the coordinates of the active pen by enabling the plurality of first sensing lines and the plurality of second sensing lines when the active pen is detected, and perform local sensing by enabling the first sensing lines and the second sensing lines connected to a specific divided block where the active pen is located and a first adjacent divided block when the coordinates of the active pen are detected.

[0012] The second active pen sensing section may include a first section and a second section, and when the active pen is detected, the sensing driving device may provide a driving signal to a plurality of first sensing lines during the first section and receive a second sensing signal through a plurality of second sensing lines during the second section.

[0013] When the coordinates of the active pen are detected, the sensing driving device may determine a first adjacent division block based on a current position of the active pen from a center point of a specific division block.

[0014] According to a second aspect of the embodiment, in order to achieve the above or other purposes, a sensing driving method in an active pen sensing device is proposed, the active pen sensing device comprising: a plurality of divided blocks divided into a matrix along a first direction and a second direction intersecting the first direction, each divided block comprising a plurality of sensing units; a plurality of first sensing lines connected to the plurality of sensing units of each of the plurality of divided blocks along the first direction; a plurality of second sensing lines connected to the plurality of sensing units of each of the plurality of divided blocks along the second direction; and a sensing driving device connected to the plurality of first sensing lines and the plurality of second sensing lines to drive the plurality of divided blocks, the sensing driving method comprising the following steps: detecting whether an active pen exists by enabling the plurality of first sensing lines; detecting the coordinates of the active pen by enabling the plurality of first sensing lines and the plurality of second sensing lines when the active pen is detected; and performing local sensing by enabling the first sensing lines and the second sensing lines connected to a specific divided block where the active pen is located and a first adjacent divided block when the coordinates of the active pen are detected.

[0015] The second active pen sensing section may include a first section and a second section, and when an active pen is detected, detection of coordinates of the active pen may include providing a driving signal to a plurality of first sensing lines during the first section and receiving a second sensing signal through a plurality of second sensing lines during the second section.

[0016] The performing of the local sensing may include determining a first adjacent divided block based on a current position of the active pen from a center point of a specific divided block when the coordinates of the active pen are detected.

[0017] According to a third aspect of the embodiments, a display device includes an active pen sensing device.

[0018] Effects of the active pen sensing device, the sensing driving method, and the display device according to the embodiments are described as follows.

[0019] According to at least one embodiment, the sensing section ( Figure 3 Compared with T in FIG, the section for detecting the presence of an active pen and local sensing can be significantly shortened. Therefore, the requirements for high-resolution display and even higher driving frequency can be met.

[0020] According to at least one embodiment, there is an advantage in that power consumption can be significantly reduced because local sensing is performed on a specific divided block where the active pen is located among a plurality of divided blocks and adjacent divided blocks.

[0021] According to at least one embodiment, during local sensing of a specific divided block and an adjacent divided block, a sensing signal may be received not only through the second sensing line but also through the first sensing signal connected to the specific divided block and the adjacent divided block. Therefore, more precise and accurate local sensing may be performed based on the third sensing signal received from the first sensing line and the fourth sensing signal received from the second sensing line, thereby preventing errors due to sensing detection in advance.

[0022] According to at least one embodiment, as the active pen moves, a new specific division block and a new adjacent division block may be determined, and a previous specific division block and a previous adjacent division block may be excluded. Therefore, by performing local sensing on a small number of division blocks consisting of the new specific division block and the adjacent division block, power consumption may be significantly reduced. In addition, local sensing and subsequent operations of local sensing may be performed quickly so that the sensing processing speed may be shortened.

[0023] The additional applicable scope of the embodiment will become apparent from the following detailed description. However, since those skilled in the art can clearly understand various changes and modifications within the spirit and scope of the embodiment, the detailed description and specific embodiments such as the preferred embodiment should be understood to be given as examples only. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a configuration diagram of a display device according to an embodiment.

[0025] Figure 2 yes Figure 1 Configuration diagram of the sensing drive device.

[0026] Figure 3 Shown is the sensing time of an active pen according to the prior art.

[0027] Figure 4 An active pen sensing device according to an embodiment is shown.

[0028] Figure 5 yes Figure 4 Detailed configuration diagram of multiple divided blocks, multiple first sensing lines and multiple second sensing lines.

[0029] Figure 6 yes Figure 4 Detailed configuration diagram of the sensing drive device.

[0030] Figure 7 Shown is the sensing time of the active pen according to the embodiment.

[0031] Figure 8 Describes the operation of detecting the presence of an active pen.

[0032] Fig. 9 The operation of detecting the coordinates of the active pen will be described.

[0033] Fig.10 A local sensing operation for an active pen is described.

[0034] Fig.11 A method for determining neighboring partitions around a specific partition where an active pen is located is described.

[0035] Fig. 12A A neighboring partition block at a first position of the active pen is shown.

[0036] Fig. 12B Shown are adjacent divided blocks that are newly determined when the active pen moves from a first position to a second position.

[0037] Fig.13 (a) in FIG. 1 shows tracking of an active pen by sensing time of an active pen according to the prior art.

[0038] Fig.13 (b) in FIG. 1 shows tracking of the active pen by sensing time of the active pen according to an embodiment. DETAILED DESCRIPTION

[0039] Hereinafter, the embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings, but regardless of the reference numbers, the same or similar elements will be given the same reference numbers, and their redundant descriptions will be omitted. The suffixes "module" and "unit" of the elements used in the following description are given or interchangeably used in consideration of ease of writing the specification, and do not have different meanings or functions from each other. In addition, the accompanying drawings are for ease of understanding the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the accompanying drawings. In addition, when an element such as a layer, a region or a substrate is referred to as being "on" another element, this means that it can be directly on another element or there are other intermediate elements between them.

[0040] Figure 1 is a configuration diagram of a display device according to an embodiment. Figure 1 , the display device 100 according to the embodiment may include a panel 110, a data driving device 120, a gate driving device 130, a sensing driving device 140, and the like.

[0041] In an implementation, the panel 110 may include a liquid crystal display panel, an organic light emitting display panel, etc., but is not limited thereto.

[0042] The panel 110 may include a plurality of gate lines GL, a plurality of data lines DL, and a plurality of pixels P. The plurality of gate lines GL may be connected to a gate driving device 130. The plurality of data lines DL may be connected to a data driving device 120. The plurality of pixels P may be connected to the plurality of gate lines GL and the plurality of data lines DL. The pixel P may include a plurality of sub-pixels. For example, the pixel P may include a first sub-pixel emitting red light, a second sub-pixel emitting green light, a third sub-pixel emitting blue light, and the like.

[0043] In addition, the panel 110 may include a plurality of sensing units SS. In an embodiment, the sensing unit SS may be implemented in an embedded method, an external method, an additional method, etc. For example, when a plurality of pixels P are defined between a lower substrate and an upper substrate, in the embedded method, the sensing unit SS is disposed inside or around the pixel P, and in the external method, the sensing unit SS may be disposed on the upper substrate. In addition, in the additional method, the sensing unit SS may be above the upper substrate and spaced apart from the upper substrate. In the embedded method, the display panel and the sensing panel may be implemented integrally. In the external method or the additional method, the display panel and the sensing panel may be separated independently.

[0044] The sensing unit SS may include a sensing electrode. The sensing electrode may include a first sensing electrode and a second sensing electrode, but is not limited thereto. A predetermined capacitance may be formed between the first sensing electrode and the second sensing electrode. A driving signal may be provided to the first sensing electrode, and a sensing signal may be output from the second sensing electrode. When an object touches the sensing unit SS or an object approaches the sensing unit SS, the capacitance between the first sensing electrode and the second sensing electrode changes, and the changed capacitance may be output as a sensing signal. The object may include a hand, a finger 20, an active pen 10, etc. Object sensing may be performed by providing only one sensing electrode (without being divided into a first sensing electrode and a second sensing electrode).

[0045] The display panel and the sensing panel may share some components with each other. As an example, the display panel and the sensing panel may share an upper substrate.

[0046] As another example, a sensing electrode constituting a sensing unit SS in a sensing panel and a common electrode constituting a pixel P in a display panel may be shared with each other.

[0047] As another example, a sensing electrode constituting a sensing unit SS in a sensing panel and a common electrode constituting a pixel P in a display panel may be independently provided without being shared with each other.

[0048] In addition, the data driving device 120 may supply data signals to the data lines DL to display image signals to the respective pixels P of the panel 110 .

[0049] The gate driving device 130 may sequentially provide scan signals to the plurality of gate lines GL to turn on or off transistors in the respective pixels P.

[0050] The gate driving device 130 may be located only on one side of the panel 110 as shown in this figure, or may be divided into two and located on both sides of the panel 110 according to a driving method.

[0051] The sensing driver 140 may supply a driving signal to all or part of the plurality of sensing units SS connected to the plurality of sensing lines SL. Although not shown, the sensing line SL may include a first sensing line and a second sensing line. For example, the first sensing line may be connected to a first sensing electrode of the sensing unit SS, and the second sensing line may be connected to a second sensing electrode of the sensing unit SS. The first sensing line may provide a driving signal generated by the sensing driver 140 to the first sensing electrode of the sensing unit SS. The second sensing line may provide a sensing signal output from the second sensing electrode of the sensing unit SS to the sensing driver 140. The first sensing line may be referred to as a transmitting sensing line, and the second sensing line may be referred to as a receiving sensing line. Object sensing may be performed by providing only one sensing line without being divided into a first sensing line and a second sensing line.

[0052] As an example, the sensing driver 140 may be configured separately from the data driver 120 and the gate driver 130. For example, the data driver 120, the gate driver 130, and the sensing driver 140 may each be configured as a separate integrated circuit. As another example, depending on the implementation method, the sensing driver 140 may be included in the data driver 120 or the gate driver 130. As another example, the data driver 120, the gate driver 130, and the sensing driver 140 may be configured as one integrated circuit.

[0053] The sensing driving device 140 is not limited in terms of implementation and design methods, and may be a different configuration itself, or may be disposed inside or outside another configuration, as long as the functions performed in the implementation are the same or similar.

[0054] Although one sensing driving device 140 is provided in the drawing, two or more sensing driving devices 140 may be provided.

[0055] In addition, the display device 100 may adopt a capacitive type object sensing method that recognizes a touch or approach of an object by detecting a change in capacitance through the sensing unit SS.

[0056] As an example, the capacitance type object sensing method may be divided into a mutual capacitance type object sensing method and a self capacitance type object sensing method.

[0057] The display device 100 may adopt one of the above two types of capacitive object sensing methods (ie, mutual capacitance object sensing method and self capacitance object sensing method). Hereinafter, for convenience of explanation, the embodiment will be described assuming that the mutual capacitance object sensing method is adopted.

[0058] The sensing driving device 140 may drive the panel 110 to recognize a touch of the finger 20 or the active pen 10 or an approach of the finger 20 or the active pen 10 .

[0059] Reference Figure 2 , the sensing driving device 140 may include a driving circuit 141 and a sensing circuit 142. The driving circuit 141 and / or the sensing circuit 142 may be configured as an integrated circuit. The driving circuit 141 and the sensing circuit 142 may be integrated into one integrated circuit or integrated into separate integrated circuits.

[0060] The driving circuit 141 may provide a driving signal STX to the sensing units SS on the panel 110. For example, the driving circuit 141 may supply the driving signal STX to one or more sensing units SS connected to each of a plurality of first sensing lines on the panel 110, but is not limited thereto.

[0061] The drive signal STX may be a voltage signal or a current signal. The drive signal STX may have a pulse waveform. The pulse waveform may be of various types, such as a standing wave or a square wave. Hereinafter, for convenience of explanation, it will be assumed that a drive signal STX having a square wave is used to describe the embodiment.

[0062] The driving signal STX may be an uplink signal and may be a signal for synchronizing the active pen 10. The uplink signal may include panel information of the panel 110, a protocol version, a synchronization signal, and the like. For example, the uplink signal may be provided as the driving signal STX to the sensing unit SS on the panel 110. When the active pen 10 approaches the panel 110, the active pen 10 may receive the uplink signal from the sensing unit SS. The active pen 10 may be synchronized based on the uplink signal and then send a downlink signal to the sensing unit SS. The downlink signal may be provided from the sensing unit SS to the sensing circuit 142 so that the active pen 10 may be identified.

[0063] In addition, the driving signal STX can be used to identify the touch of the finger 20 or the active pen or the approach of the finger 20 or the active pen. That is, the driving signal STX can be provided to the sensing unit SS, and the sensing signal can be provided from the sensing unit SS to the sensing circuit 142, so that the touch of the finger 20 or the active pen or the approach of the finger 20 or the active pen can be identified.

[0064] Although not shown, one frame includes a sensing section for sensing the finger 20 (hereinafter referred to as a finger sensing section) and a sensing section for sensing the active pen 10 (hereinafter referred to as an active pen sensing section), but is not limited thereto.

[0065] In addition, the sensing circuit 142 may receive a sensing signal SRX corresponding to the driving signal STX including an uplink signal, etc. from one or more sensing units SS connected to each of the plurality of second sensing lines on the panel 110. The sensing circuit 142 may sense or detect a touch or approach of an object such as a finger 20 or an active pen 10 to the panel 110 based on the sensing signal SRX.

[0066] The sensing circuit 142 may generate sensing data T_DATA according to the sensing signal SRX.

[0067] The sensing data T_DATA may include a sensing value generated by demodulating the sensing signal SRX. For example, the sensing value may be a time-integrated value of a current or voltage of the sensing signal SRX. The sensing value may be used to determine whether an object exists on the panel 110 or to generate object coordinates. For example, when the sensing value is greater than or less than a reference value, it may be determined that a touch of an object has occurred or it may be determined that an object is approaching.

[0068] In addition, the sensing driving device 140 may include a signal synchronization circuit 143. The signal synchronization circuit 143 may use a partial section of the downlink signal to synchronize the receiving timing of the active pen 10 to the sending timing.

[0069] Although not shown, the sensing driving device 140 may include a signal generator. The signal generator may generate a driving signal STX supplied to the sensing unit SS on the panel 110.

[0070] Although not shown, the sensing driving device 140 may include a controller such as a microcontroller unit (MCU) and a memory.

[0071] The signal synchronization circuit 143, the driving circuit 141, and the sensing circuit 142 may be referred to as a signal synchronization unit, a driving unit, and a sensing unit, respectively. The signal synchronization circuit 143, the driving circuit 141, and the sensing circuit 142 may be configured as separate integrated circuits, or may be configured as a single integrated circuit. The signal synchronization circuit 143, the driving circuit 141, the sensing circuit 142, etc. may be disposed inside the sensing driving device 140, but may be disposed inside the data driving device 120 or the strobe driving device 130.

[0072] In addition, if Figure 3As shown, according to the prior art, the active pen sensing section T for sensing the active pen 10 is divided into a first section t1 and a second section t2. The active pen sensing section T is a time section corresponding to one frame. In this case, during the first section t1, a driving signal STX is provided to a plurality of sensing units SS through a plurality of first sensing lines Tx_1 to Tx_N on the panel 110. During the second section t2, a sensing signal SRX is received from the plurality of sensing units SS through a plurality of second sensing lines Rx_1 to Rx_M.

[0073] Recently, the panel 110 is required to have a higher resolution and a higher driving frequency. Therefore, in order to meet the requirements of the panel 110, the active pen sensing section T used in the prior art must be further shortened.

[0074] In addition, in order to detect the presence of the active pen 10, detect the coordinates of the active pen 10, and operate the active pen 10, etc. as described above, the plurality of first sensing lines and the plurality of second sensing lines on the panel 110 are always enabled as a cycle according to the active pen sensing section T composed of the first section t1 and the second section t2. That is, the plurality of first sensing lines and the plurality of second sensing lines are always provided with electrical signals, thereby increasing power consumption. In particular, even when the position of the active pen 10 is confirmed by detecting the coordinates of the active pen 10, the plurality of first sensing lines and the plurality of second sensing lines on the entire area of ​​the panel 110 are still enabled, so that the power consumption is further increased.

[0075] The embodiments described below are intended to solve the above problems. Figures 4 to 13 In the following description, the reference numerals omitted in the corresponding figures may be used from the previous figures ( Figures 1 to 3 ).

[0076] Figure 4 An active pen sensing device according to an embodiment is shown.

[0077] Reference Figure 4 , the active pen sensing device 200 according to the embodiment may include a plurality of divided blocks 201 to 220, a sensing driving device 270, etc. The sensing driving device 270 may be Figure 1 and Figure 2 The sensing driving device 140 is shown, but is not limited thereto. The division blocks 201 to 220 may be referred to as division groups. In addition, the division blocks 201 to 220 may also be referred to as blocks. In the following description, blocks, division blocks 201 to 220 and division groups may be used interchangeably.

[0078] As an example, a plurality of division blocks 201 to 220 may be located on the panel 110. The panel 110 may include a display panel and a sensing panel. When the sensing panel is integrated with the display panel, that is, in the case of an embedded method, the plurality of division blocks 201 to 220 may be located in the display panel. When the sensing panel is provided separately from the display panel, that is, when the sensing panel is an external method or an attached method, the plurality of division blocks 201 to 220 may be located on the sensing panel.

[0079] As another example, the plurality of partition blocks 201 to 220 may be located on a component other than the panel 110. The component may be an electronic device or a circuit board that performs a predetermined operation using a data signal. In this case, the plurality of partition blocks 201 to 220 may be located on a sensing panel, and the corresponding sensing panel may be mounted on the component.

[0080] Furthermore, the plurality of divided blocks 201 to 220 may be divided into a matrix.

[0081] The plurality of divided blocks 201 to 220 may be divided along a first direction (ie, a Y direction). N divided blocks may be divided along the first direction. For example, five divided blocks may be divided along the first direction.

[0082] The plurality of divided blocks 201 to 220 may be divided along the second direction (ie, the X direction). The M divided blocks may be divided along the second direction. For example, the M divided blocks may be divided into four divided blocks along the second direction.

[0083] For convenience, the drawings show five division blocks divided along the first direction and four division blocks divided along the second direction, but more division blocks may be divided in each of the first direction and the second direction.

[0084] In addition, the sensing driving device 270 may drive the plurality of divided blocks 201 to 220. The sensing driving device 270 may drive the plurality of divided blocks 201 to 220 at the same time, but is not limited thereto.

[0085] The sensing driving device 270 may drive the plurality of divided blocks 201 to 220 to detect whether the active pen 10 exists, detect the coordinates of the active pen 10, and perform local sensing for the active pen 10. Detecting whether the active pen 10 exists, detecting the coordinates of the active pen 10, local sensing of the active pen 10, etc. may be performed in different active pen sensing sections ( Figure 7 Here, the active pen sensing sections T1, T2, and T3 may each correspond to one frame, a specific section within one frame, or one section among a plurality of sections of one frame, but is not limited thereto.

[0086] For example, the sensing driving device 270 may receive the first sensing signal SRX1 from the plurality of division blocks 201 to 220 and detect whether the active pen 10 exists.

[0087] For example, the sensing driving device 270 may provide a driving signal STX to the plurality of division blocks 201 to 220 and receive a second sensing signal SRX2 from the plurality of division blocks 201 to 220 to detect the coordinates of the active pen 10. Detecting the coordinates of the active pen 10 may be performed after detecting whether the active pen 10 exists, but is not limited thereto.

[0088] For example, the sensing driving device 270 may receive the third sensing signal SRX3 and the fourth sensing signal SRX4 from the specific divided block and the adjacent divided block where the active pen 10 is located to perform local sensing. The local sensing may be performed after detecting the coordinates of the active pen 10, but is not limited thereto. The local sensing may be performed on the specific divided block and the adjacent divided block after determining the specific divided block and the adjacent divided block where the active pen 10 is located based on the coordinates of the active pen 10.

[0089] In addition, synchronization with the active pen 10 may be performed before detecting whether the active pen 10 exists, but is not limited thereto. That is, the uplink signal may be provided to the plurality of partition blocks 201 to 220 as the driving signal STX. When the active pen 10 approaches a specific partition block among the plurality of partition blocks 201 to 220, the corresponding active pen 10 may receive the uplink signal and be synchronized. When the synchronized active pen 10 sends a downlink signal, the synchronization completion may be confirmed based on the sensing signal received from the specific partition block.

[0090] Figure 5 yes Figure 4 Detailed configuration diagram of multiple divided blocks, multiple first sensing lines and multiple second sensing lines.

[0091] Reference Figure 5 , the plurality of divided blocks 201 to 220 may each include a plurality of sensing units SS. In each of the plurality of divided blocks 201 to 220, the plurality of sensing units SS may be arranged in a matrix, but is not limited thereto. The number of sensing units SS included in each of the plurality of divided blocks 201 to 220 may be the same, but is not limited thereto.

[0092] In the drawings, each of the plurality of divided blocks 201 to 220 is illustrated as including five sensing cells SS arranged along the first direction and five sensing cells SS arranged along the second direction However, fewer or more sensing cells SS may be included.

[0093] As described above, each of the plurality of sensing units SS may include a first sensing electrode and a second sensing electrode. In an embodiment, a drive signal STX may be provided to the first sensing electrode, or a first sensing signal SRX1 or a third sensing signal SRX3 may be received from the first sensing electrode. In an embodiment, a second sensing signal SRX2 or a fourth sensing signal SRX4 may be received from the second sensing electrode. For example, the first sensing signal SRX1 may be used to detect whether the active pen 10 is present. For example, the drive signal STX and the second sensing signal SRX2 may be used to detect the coordinates of the active pen 10. For example, the third sensing signal SRX3 and / or the fourth sensing signal SRX4 may be used to perform local sensing on a specific partition block and an adjacent partition block where the active pen 10 is located.

[0094] According to an embodiment, the active pen sensing device 200 may include a plurality of first sensing lines 221 to 240 and a plurality of second sensing lines 241 to 265 .

[0095] The plurality of first sensing lines 221 to 240 may be arranged along the first direction. The plurality of first sensing lines 221 to 240 may be arranged along the first direction and connected to the plurality of sensing units SS of each of the plurality of divided blocks 201 to 220. The plurality of first sensing lines 221 to 240 may be connected to the first sensing electrode of each of the plurality of sensing units SS, but is not limited thereto.

[0096] The plurality of second sensing lines 241 to 265 may be arranged along the second direction. The plurality of second sensing lines 241 to 265 may be arranged along the second direction and connected to the plurality of sensing units SS of each of the plurality of divided blocks 201 to 220. The plurality of second sensing lines 241 to 265 may be connected to the second sensing electrode of each of the plurality of sensing units SS, but is not limited thereto.

[0097] In addition, if Figure 4 and Figure 5 As shown, the plurality of first sensing lines 221 to 240 may be connected to the sensing driver 270. The plurality of second sensing lines 241 to 265 may be connected to the sensing driver 270. Therefore, an electrical signal may be provided from the sensing driver 270 to the sensing unit SS of each of the plurality of divided blocks 201 to 220 or from the sensing unit SS of each of the plurality of divided blocks 201 to 220 to the sensing driver 270 through the plurality of first sensing lines 221 to 240 and the plurality of second sensing lines 241 to 265.

[0098] Supplying an electrical signal to the plurality of first sensing lines 221 to 240 may mean that the plurality of first sensing lines 221 to 240 are enabled. Not supplying an electrical signal to the plurality of first sensing lines 221 to 240 may mean that the plurality of first sensing lines 221 to 240 are disabled.

[0099] Supplying an electrical signal to the plurality of second sensing lines 241 to 265 may mean that the plurality of second sensing lines 241 to 265 are enabled. Not supplying an electrical signal to the plurality of second sensing lines 241 to 265 may mean that the plurality of second sensing lines 241 to 265 are disabled.

[0100] As an example, the driving signal STX may be provided from the sensing driver 270 to the sensing unit SS of each of the plurality of divided blocks 201 to 220 through the plurality of first sensing lines 221 to 240. As another example, the first sensing signal SRX1 or the third sensing signal SRX3 may be provided to the sensing driver 270. For example, the first sensing signal SRX1 or the third sensing signal SRX3 may be provided to the sensing driver 270 from the first sensing electrode of each sensing unit SS. As another example, the second sensing signal SRX2 or the fourth sensing signal SRX4 may be provided to the sensing driver 270 from the sensing unit SS of each of the plurality of divided blocks 201 to 220. For example, the second sensing signal SRX2 or the fourth sensing signal SRX4 may be provided to the sensing driver 270 from the second sensing electrode of each sensing unit SS.

[0101] Figure 6 yes Figure 4 Detailed configuration diagram of the sensing drive device.

[0102] Reference Figure 6 , the sensing driving device 270 may include a first multiplexer 271, a second multiplexer 272, and a sensing controller 273. The sensing driving device 270 may include a signal generator 274 and a sensing circuit 275. The sensing driving device 270 may include more components than these.

[0103] The signal generator 274 may generate a driving signal STX and provide the driving signal STX to the first multiplexer 271. The sensing circuit 275 may receive a sensing signal (ie, first to fourth sensing signals SRX1 to SRX4) from each of the plurality of first sensing lines 221 to 240 or the plurality of second sensing lines 241 to 265 via the first multiplexer 271 or the second multiplexer 272.

[0104] The first multiplexer 271 may be connected to the signal generator 274, the sensing circuit 275, and the plurality of first sensing lines 221 to 240. The first multiplexer 271 is connected to the signal generator 274 and the sensing circuit 275, and may be connected to the plurality of first sensing lines 221 to 240. The first multiplexer 271 may selectively connect the signal generator 274 and the sensing circuit 275. For example, when the first multiplexer 271 is selected to be connected to the signal generator 274, the driving signal STX of the signal generator 274 may be provided to the plurality of first sensing lines 221 to 240 through the first multiplexer 271. For example, when the first multiplexer 271 is selected to be connected to the sensing circuit 275, the first sensing signal SRX1 or the third sensing signal SRX3 of each of the plurality of first sensing lines 221 to 240 may be provided to the sensing circuit 275 via the first multiplexer 271.

[0105] The second multiplexer 272 may be connected to the sensing circuit 275 and the plurality of second sensing lines 241 to 265. The second multiplexer 272 may be connected to the sensing circuit 275, and may be connected to the plurality of second sensing lines 241 to 265. The second sensing signal SRX2 or the fourth sensing signal SRX4 of each of the plurality of second sensing lines 241 to 265 may be provided to the sensing circuit 275 via the second multiplexer 272.

[0106] As an example, the sensing circuit 275 may detect whether the active pen 10 exists based on the first sensing signal SRX1. In addition, the sensing circuit 275 may obtain an X-axis coordinate value among coordinates of the active pen 10 based on the first sensing signal SRX1.

[0107] As another example, the sensing circuit 275 may detect the coordinates of the active pen 10 based on the second sensing signal SRX2. For example, the sensing circuit 275 may detect the XY coordinates of the active pen 10 using the X-axis coordinate value and the Y-axis coordinate value, and obtain the current position information of the active pen 10 based on the XY coordinates of the active pen 10. At this time, the current position of the active pen 10 may be located at a specific sensing cell SS among the plurality of sensing cells SS of a specific divided block among the plurality of divided blocks 201 to 220.

[0108] In addition, information (e.g., center coordinate information) about the center point of each of the plurality of divided blocks 201 to 220 may be obtained in advance and stored in the storage unit. In this case, the sensing circuit 275 may obtain information about how far the active pen 10 is from the center of a specific divided block, the moving direction of the active pen 10, etc. based on the current position information of the active pen 10 and the center coordinate information of the specific divided block where the active pen 10 is located.

[0109] Furthermore, the first to fourth sensing signals SRX1 to SRX4 received by the sensing circuit 275 may be provided to a signal processing device or another arithmetic processing device to perform the functions of the sensing circuit 275 described above.

[0110] In addition, the sensing controller 273 may control the first multiplexer 271 and the second multiplexer 272. The sensing controller 273 may generate a first sensing control signal SCS1, a second sensing control signal SCS2, a third sensing control signal SCS3, etc. The first sensing control signal SCS1 may be a control signal for detecting whether the active pen 10 exists. The first multiplexer 271 may be controlled by the first sensing control signal SCS1. The second sensing control signal SCS2 may be a control signal for detecting the coordinates of the active pen 10. The first multiplexer 271 and the second multiplexer 272 may be controlled by the second sensing control signal SCS2. The third sensing control signal SCS3 may be a control signal for performing local sensing on a specific divided block and an adjacent divided block where the active pen 10 is located. The first multiplexer 271 and the second multiplexer 272 may be controlled by the third sensing control signal SCS3.

[0111] Below, refer to Figures 7 to 11 , a sensing driving method according to an embodiment will be described in detail.

[0112] although Figure 7 Only three active pen sensing segments T1, T2, and T3 are shown in the figure, but one or more of the three active pen sensing segments T1, T2, and T3 may be repeated one or more times. As an example, the three active pen sensing segments T1, T2, and T3 may each be equal to one frame. As another example, each of the three active pen sensing segments T1, T2, and T3 may be equal to a partial segment of a frame. As another example, the three active pen sensing segments T1, T2, and T3 may each be one segment or two segments among the multiple segments constituting one frame. In the accompanying drawings, the three active pen sensing segments (T1, T2, and T3) are shown as being in contact with each other, but they may be spaced apart in time.

[0113] The first active pen sensing section T1 and the third active pen sensing section T3 are divided into first sections t11 and t31 and second sections t12 and t32. This corresponds to Figure 3 In the prior art active pen sensing section T shown, the second section t12 of the first active pen sensing section T1 and the second section t32 of the third active pen sensing section T3 can be omitted. Therefore, the first active pen sensing section T1 or the third active pen sensing section T3 is only the first section t11 and t31, which can be reduced by half or more than the second active pen sensing section T2.

[0114] like Figure 7As shown, the presence of the active pen 10 may be detected based on the first sensing signal SRX1 during the first section t11 of the first active pen sensing section T1. The first section t11 of the first active pen sensing section T1 may be repeated until the presence of the active pen 10 is detected, but is not limited thereto.

[0115] When the presence or absence of the active pen 10 is detected, the coordinates of the active pen 10 may be detected during the first section t21 and the second section t22 of the second active pen sensing section T2. ​​For example, the driving signal STX may be provided to the plurality of divided blocks 201 to 220 during the first section t21 of the second active pen sensing section T2, and the second sensing signal SRX2 may be received from the plurality of divided blocks 201 to 220 during the second section t22 of the second active pen sensing section T2, so that the coordinates of the active pen 10 may be detected. When the coordinates of the active pen 10 are detected based on the second sensing signal SRX2 received once, the second active pen sensing section T2 does not need to be repeated. If the coordinates of the active pen 10 are not detected based on the second sensing signal SRX2 received once, the second active pen sensing section T2 may be repeated until the coordinates of the active pen 10 are detected.

[0116] When it is detected whether the active pen 10 is present, a specific divided block and an adjacent divided block where the active pen 10 is located may be determined. Thereafter, local sensing may be performed on the specific divided block and the adjacent divided block during the first section t31 of the third active pen sensing section T3. Therefore, local sensing may be performed by repeating the first section t31 of the third active pen sensing section T3. Local sensing may be a sensing method of obtaining an input signal of the active pen 10 by narrowing the sensing range to a local area where the active pen 10 is located among the entire area. By performing local sensing with a narrow sensing range in this way, a delay in the sensing processing speed caused by performing a sensing operation on the entire area to obtain an input signal of the active pen 10 may be prevented, and power consumption may be reduced by enabling only the first sensing line and the second sensing line corresponding to the local area.

[0117] [Detection of the Presence of Active Pen 10]

[0118] Reference Figure 7 and Figure 8, the sensing controller 273 may provide the first sensing control signal SCS1 to the first multiplexer 271 during the first section t11 of the first active pen sensing section T1. At this time, since the control signal is not provided to the second multiplexer 272, the second multiplexer 272 may not operate. The first multiplexer 271 may select the sensing circuit 275 from the sensing circuit 275 and the signal generator 274 according to the first sensing control signal SCS1, so that the sensing circuit 275 can be connected to the plurality of first sensing lines 221 to 240 through the first multiplexer 271. Therefore, the plurality of first sensing lines 221 to 240 may be enabled to provide an electrical signal. The active pen 10 may periodically transmit an electrical signal. Therefore, the electrical signal provided from the active pen 10 may be obtained as the first sensing signal SRX1 through the plurality of first sensing lines 221 to 240. The first sensing signal SRX may be larger in an area where the active pen 10 is close than in another area where the active pen 10 is not provided. The first sensing signal SRX1 sensed from each of the plurality of sensing units SS of each of the plurality of divided blocks 201 to 220 may be provided to the sensing circuit 275 via the plurality of first sensing lines 221 to 240 and the first multiplexer 271. The sensing circuit 275 may detect whether the active pen 10 exists based on the first sensing signal SRX1. That is, when the magnitude of the first sensing signal SRX is greater than a set value, it may be recognized that the active pen 10 exists at a close distance. The sensing circuit 275 may obtain an X-axis coordinate value among the coordinates of the active pen 10 based on the first sensing signal SRX1.

[0119] [Detection of Coordinates of Active Pen 10]

[0120] Reference Figure 7 and Fig. 9 , the sensing controller 273 may provide the second sensing control signal SCS2 to the first multiplexer 271 during the first section t21 of the second active pen sensing section T2. ​​The first multiplexer 271 may select the signal generator 274 from the sensing circuit 275 and the signal generator 274 according to the second sensing control signal SCS2, so that the signal generator 274 may be connected to the plurality of first sensing lines 221 to 240 through the first multiplexer 271. Therefore, the plurality of first sensing lines 221 to 240 may be enabled to provide electrical signals. The driving signal STX generated by the signal generator 274 may be provided to the plurality of sensing units SS of each of the plurality of divided blocks 201 to 220 through the first multiplexer 271 and the plurality of first sensing lines 221 to 240.

[0121] The sensing controller 273 may provide the second multiplexer 272 with a second sensing control signal SCS2 during the second section t22 of the second active pen sensing section T2. ​​The second multiplexer 272 may connect the sensing circuit 275 to the plurality of second sensing lines 241 to 265 according to the second sensing control signal SCS2. Therefore, the plurality of second sensing lines 241 to 265 may be enabled to provide electrical signals. The second sensing signal SRX2 generated from each of the plurality of sensing units SS of each of the plurality of divided blocks 201 to 220 may be provided to the sensing circuit 275 via the plurality of second sensing lines 241 to 265 and the second multiplexer 272. The sensing circuit 275 may detect the coordinates of the active pen 10 based on the second sensing signal SRX2. The Y-axis coordinate value may be obtained from the coordinates of the active pen 10 based on the second sensing signal SRX2. Therefore, the XY coordinates of the active pen 10 may be detected using the X-axis coordinate value and the Y-axis coordinate value, and the coordinate information of the active pen 10 may be stored in a storage unit or the like.

[0122] [Local Sensing]

[0123] Before performing local sensing, a specific divided block and neighboring divided blocks where the active pen 10 is located may be determined.

[0124] like Fig.11 As shown, the sensing circuit 275 (or the sensing controller 273 ) may detect a current position 320 of the active pen 10 based on coordinate information of the active pen 10 .

[0125] Based on the current position 320 of the active pen 10, the sensing controller 273 may determine the division block where the active pen 10 is located as the specific division block 211. In addition, the sensing controller 273 may determine the neighboring division blocks 210, 214, and 215 around the specific division block 211 based on the center point coordinate information set in the specific division block 211. For example, the sensing controller 273 may determine the neighboring division blocks 210, 214, and 215 based on the direction between the center point 310 of the specific division block 211 and the current position 320 of the active pen 10.

[0126] like Fig.11 As shown, when the active pen 10 is located in the southwest direction of the center point 310 of a specific divided block 211, the left divided block 210, the southwest divided block 214 and the lower divided block 215 of the specific divided block 211 can be determined as adjacent divided blocks 210, 214 and 215.

[0127] Reference Figure 7 and Fig.10, after determining the specific divided block 211 where the active pen 10 is located and the adjacent divided blocks 210 , 214 , and 215 , the sensing controller 273 may provide the third sensing control signal SCS3 to the first multiplexer 271 and the second multiplexer 272 during the first section t31 of the third active pen sensing section T3 .

[0128] The first multiplexer 271 may select the sensing circuit 275 among the sensing circuits 275 and the signal generator 274 according to the third sensing control signal SCS3 so that the sensing circuit 275 may be connected to the plurality of first sensing lines 221 to 240. Specifically, the first multiplexer 271 may connect the sensing circuit 275 to the first sensing lines 226 to 235 connected to the specific division block 211 and the adjacent division blocks 210, 214, and 215 among the plurality of first sensing lines 221 to 240. Therefore, the first sensing lines 226 to 235 connected to the specific division block 211 and the adjacent division blocks 210, 214, and 215 may be enabled to provide electrical signals, and the remaining first sensing lines 221 to 225 and 236 to 240 may be disabled.

[0129] At the same time, the second multiplexer 272 may connect the sensing circuit 275 to the plurality of second sensing lines 241 to 265 according to the third sensing control signal SCS3. Specifically, the second multiplexer 272 may connect the sensing circuit 275 to the second sensing lines 251 to 260 connected to the specific division block 211 and the adjacent division blocks 210, 214, and 215 among the plurality of second sensing lines 241 to 265. Therefore, the second sensing lines 251 to 260 connected to the specific division block 211 and the adjacent division blocks 210, 214, and 215 are enabled to provide electrical signals, and the remaining second sensing lines 246 to 250 and 261 to 265 may be disabled.

[0130] The third sensing signal SRX3 generated from each of the plurality of sensing units SS of each of the plurality of division blocks 201 to 220 may be provided to the sensing circuit 275 via the first sensing lines 226 to 235 connected to the specific division block 211 and the adjacent division blocks 210, 214, and 215 and the first multiplexer 271. The fourth sensing signal SRX4 generated from each of the plurality of sensing units SS of each of the plurality of division blocks 201 to 220 may be provided to the sensing circuit 275 via the second sensing lines 251 to 260 connected to the specific division block 211 and the adjacent division blocks 210, 214, and 215 and the second multiplexer 272. As described above, the electrical signal periodically provided from the active pen 10 is obtained as the third sensing signal SRX3 through the first sensing lines 226 to 235, and may be obtained as the fourth sensing signal SRX4 through the second sensing lines 251 to 260. The third sensing signal SRX3 and the fourth sensing signal SRX4 are simultaneously generated from each of the plurality of sensing units SS through the first sensing lines 226 to 235 and the second sensing lines 251 to 260. The third sensing signal SRX3 may be generated from the first sensing electrode of each of the plurality of sensing units SS, and at the same time, the fourth sensing signal SRX4 may be generated from the second sensing electrode of each of the plurality of sensing units SS. At this time, the third sensing signal SRX3 and the fourth sensing signal SRX4 may be different, but are not limited thereto. The third sensing signal SRX3 and the fourth sensing signal SRX4 may be simultaneously provided to the sensing circuit 275, but are not limited thereto.

[0131] The sensing circuit 275 may perform local sensing on the specific divided block 211 and the adjacent divided blocks 210, 214, and 215 based on the third sensing signal SRX3 and the fourth sensing signal SRX4. As local sensing, the movement of the active pen 10 located on the specific divided block 211 to one of the adjacent divided blocks 210, 214, and 215 or to another divided block may be tracked. As local sensing, the pressure intensity applied by the active pen 10 located on the specific divided block 211 or the shape drawn on the contact surface may be tracked. In addition, for various inputs or functions of the active pen 10, local sensing may be performed on the specific divided block 211 or the adjacent divided blocks 210, 214, and 215.

[0132] According to the embodiment, the section for detecting the presence of the active pen 10 and local sensing is different from the prior art ( Figure 3 ) can be significantly shortened compared to the active pen sensing section T in the prior art ( Figure 3 ), a driving signal STX may be provided through a plurality of first sensing lines Tx_1 to Tx_N during a first section t1 of the active pen sensing section T, and a sensing signal SRX may be received through a plurality of second sensing lines Rx_1 to Rx_M during a second section t2. Figure 3), the active pen sensing section T is always used to detect whether the active pen exists and to detect the coordinates of the active pen. On the other hand, according to the embodiment ( Figure 6 ), since only half of the first active pen sensing section T3 is used to detect whether the active pen 10 exists, it is different from the prior art ( Figure 3 ) can be reduced by half or more. In addition, even during local sensing, compared with the prior art ( Figure 3 ) can also reduce the time by half or more. Figure 3 ) does not disclose local sensing, and since the embodiment recognizes the operation of the active pen 10 through a local area through local sensing, it is different from the prior art ( Figure 3 ), the power consumption can be significantly reduced.

[0133] Therefore, embodiments can meet the requirements of high-resolution display and even higher driving frequency.

[0134] According to an embodiment, since local sensing is performed on a specific division block 211 and neighboring division blocks 210 , 214 , and 215 where the active pen 10 is located among a plurality of division blocks 201 to 220 , power consumption may be significantly reduced.

[0135] According to an embodiment, when local sensing is performed for a specific divided block 211 and adjacent divided blocks 210, 214, and 215, sensing signals may be received not only through the second sensing lines 241 to 265 but also through the first sensing lines 221 to 240 connected to the specific divided block 211 and the adjacent divided blocks 210, 214, and 215. Therefore, more precise and accurate local sensing may be performed by using the third sensing signal SRX3 received from the first sensing lines 221 to 240 and the fourth sensing signal SRX4 received from the second sensing lines 241 to 265, so that errors due to sensing detection may be prevented in advance.

[0136] Furthermore, as the active pen 10 moves, a new specific division block 211 and neighboring division blocks 210 , 214 , and 215 may be determined.

[0137] Fig. 12A A proximate partitioned block of the active pen at a first position is shown. Fig. 12B Shown are adjacent divided blocks that are newly determined when the active pen moves from a first position to a second position.

[0138] like Fig. 12A As shown, the current active pen 10 may be located on a specific divided block 214. Since the active pen 10 is located northeast of the center point of the specific divided block 214, the upper divided block 210 based on the specific divided block 214, the divided block 211 in the northeast direction, and the right divided block 215 may be determined as adjacent divided blocks 210, 214, and 215.

[0139] like Fig. 12B As shown, the active pen 10 may move from the first position 330 of the previous specific divided block 214 to the second position 340 of the current specific divided block 211. That is, the active pen 10 may move in the northeast direction. In this case, the divided block 211 in the northeast direction may be determined as a new specific divided block. Since the active pen 10 is located in the new specific divided block 211, the upper divided block 207, the divided block 208 in the northeast direction, and the right divided block 212 of the new specific divided block 211 may be determined as a new divided block. While determining the new adjacent divided blocks 207, 208, and 212, the existing specific divided block 214 and the existing adjacent divided blocks 210 and 215 may be excluded from the divided blocks to perform local sensing, but is not limited thereto. The existing divided blocks 210 and 215 may be located on the opposite side of the new adjacent divided blocks 207, 208, and 212 based on the new specific divided block 211.

[0140] According to an embodiment, as the active pen 10 moves, a new specific division block and a new adjacent division block may be determined, and a previous specific division block and a previous adjacent division block may be excluded. Therefore, by performing local sensing on a small number of division blocks consisting of a specific division block and an adjacent division block, power consumption can be significantly reduced. In addition, local sensing and subsequent operations of local sensing can be performed quickly, so that the sensing processing speed can be shortened.

[0141] According to an embodiment, the tracking performance of the active pen 10 may be enhanced.

[0142] Fig.13 (a) in FIG. 1 shows tracking of an active pen through sensing time of an active pen according to the prior art. Fig.13 (b) in FIG. 1 shows tracking of the active pen by sensing time of the active pen according to an embodiment.

[0143] like Figure 3 and Fig.13 As shown in (a) of FIG. 1 , according to the prior art, the active pen sensing section ( Figure 3 The active pen 10 is provided with a driving signal STX to the sensing unit SS during a first section t1 of the active pen sensing section T and receives a sensing signal SRX from the sensing unit SS during a second section t2 of the active pen sensing section T to track the movement of the active pen 10. Therefore, in order to track the movement of the active pen 10, since the entire time of the first section t1 and the second section t2 of the active pen sensing section T is spent, the movement tracking of the active pen 10 is not smoothly performed.

[0144] However, if Figure 7 and Fig.13 As shown in (b) of FIG. 1 , according to an embodiment, the time spent on tracking the movement of the active pen 10 may be the time spent on tracking the movement of the active pen 10 in the prior art ( Fig.13One or less of the first segment t1 and the second segment t2 in (a)).

[0145] For example, in the active pen sensing section ( Figure 7 During the first section t31 of T3 in FIG. 1 , the sensing unit SS simultaneously provides the third sensing signal SRX3 and the fourth sensing signal SRX4, thereby Fig.13 Compared with (a) in FIG. 1 , the time can be significantly reduced. Therefore, the movement tracking of the active pen 10 can be smoothly performed. In particular, the coordinates of the active pen 10 can be more precisely and accurately detected based on the third sensing signal SRX3 and the fourth sensing signal SRX4, so that the performance of the movement tracking of the active pen 10 can be improved.

[0146] Furthermore, although not shown, when the active pen 10 deviates from above a specific divided block by more than a predetermined distance while performing partial sensing, the sensing driving device 270, that is, the sensing controller 273 (or the sensing unit 275) may stop performing partial sensing, and enable the plurality of first sensing lines 221 to 240 to detect whether the active pen 10 exists. In other words, when the active pen 10 deviates from above a specific divided block by more than a predetermined distance while performing partial sensing, the sensing driving device 270 may perform an operation to stop performing partial sensing, and detect again whether the active pen 10 exists or its coordinates.

[0147] The above detailed description should not be interpreted as limiting in all aspects, but should be regarded as illustrative. The scope of the embodiments should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the embodiments are included in the scope of the embodiments.

Claims

1. An active pen sensing device, the active pen sensing device comprising: a plurality of divided blocks, wherein the plurality of divided blocks are divided into a matrix along a first direction and a second direction intersecting the first direction, and each divided block includes a plurality of sensing units; a plurality of first sensing lines connected to the plurality of sensing units of each of the plurality of divided blocks along the first direction; a plurality of second sensing lines connected to the plurality of sensing units of each of the plurality of divided blocks along the second direction; as well as a sensing driving device connected to the plurality of first sensing lines and the plurality of second sensing lines to drive the plurality of divided blocks, Wherein, the sensing driving device is configured as follows: detecting the presence of an active pen by enabling the plurality of first sensing lines, When the active pen is detected, the coordinates of the active pen are detected by enabling the plurality of first sensing lines and the plurality of second sensing lines, and When the coordinates of the active pen are detected, local sensing is performed by enabling the first sensing line and the second sensing line connected to a specific division block where the active pen is located and a first adjacent division block.

2. The active pen sensing device according to claim 1, wherein: The sensing driving device is configured as follows: receiving a first sensing signal through the plurality of first sensing lines during one section of the first active pen sensing section to detect whether the active pen exists, wherein the second active pen sensing section includes the first section and the second section, and When the active pen is detected, the sensing driving device is configured to: Driving signals are provided to the plurality of first sensing lines during the first section and second sensing signals are received through the plurality of second sensing lines during the second section.

3. The active pen sensing device according to claim 1, wherein: When the coordinates of the active pen are detected, the sensing driving device is configured to: determining the first adjacent divided block based on the current position of the active pen from the center point of the specific divided block, and The third sensing signal and the fourth sensing signal are simultaneously received through the plurality of first sensing lines and the plurality of second sensing lines respectively connected to the specific division block and the determined first adjacent division block during one section of the third active pen sensing section.

4. The active pen sensing device according to claim 1, wherein: The sensing driving device comprises: a first multiplexer connected to the plurality of first sensing lines; a second multiplexer connected to the plurality of second sensing lines; and A sensing controller is configured to control the first multiplexer and the second multiplexer.

5. The active pen sensing device according to claim 1, wherein: When the active pen moves in a specific direction while performing the local sensing, the sensing driving device is configured to: determining a second adjacent divided block among adjacent divided blocks located around the specific divided block and the first adjacent divided block based on a moving direction of the active pen from a current position of the active pen, and The first adjacent division block located at an opposite side of the second adjacent division block is excluded based on the specific division block.

6. A sensing driving method in an active pen sensing device, the active pen sensing device comprising: a plurality of divided blocks, wherein the plurality of divided blocks are divided into a matrix along a first direction and a second direction intersecting the first direction, and each divided block includes a plurality of sensing units; a plurality of first sensing lines connected to the plurality of sensing units of each of the plurality of divided blocks along the first direction; a plurality of second sensing lines connected to the plurality of sensing units of each of the plurality of divided blocks along the second direction; and a sensing driving device connected to the plurality of first sensing lines and the plurality of second sensing lines to drive the plurality of divided blocks, the sensing driving method comprising the following steps: detecting the presence of an active pen by enabling the plurality of first sensing lines; When the active pen is detected, detecting coordinates of the active pen by enabling the plurality of first sensing lines and the plurality of second sensing lines; and When the coordinates of the active pen are detected, local sensing is performed by enabling the first sensing line and the second sensing line connected to a specific division block where the active pen is located and a first adjacent division block.

7. The sensing driving method according to claim 6, wherein: The step of detecting whether the active pen exists comprises the following steps: receiving a first sensing signal through the plurality of first sensing lines during one section of the first active pen sensing section to detect whether the active pen exists, The second active pen sensing section includes a first section and a second section, and The step of detecting the coordinates of the active pen comprises the following steps: When the active pen is detected, driving signals are provided to the plurality of first sensing lines during the first section and second sensing signals are received through the plurality of second sensing lines during the second section.

8. The sensing driving method according to claim 6, wherein: The step of performing the local sensing comprises the following steps: When the coordinates of the active pen are detected, determining the first adjacent divided block based on a current position of the active pen from a center point of the specific divided block; and The third sensing signal and the fourth sensing signal are simultaneously received through the plurality of first sensing lines and the plurality of second sensing lines respectively connected to the specific division block and the determined first adjacent division block during one section of the third active pen sensing section.

9. The sensing driving method according to claim 6, further comprising the following steps: When the active pen moves in a specific direction while performing the partial sensing, a second adjacent divided block among adjacent divided blocks located around the specific divided block and the first adjacent divided block is determined based on a moving direction of the active pen from a current position of the active pen.

10. A display device, comprising: panel; as well as an active pen sensing device configured to detect a touch or proximity of an active pen to the panel, Wherein, the active pen sensing device comprises: a plurality of divided blocks, wherein the plurality of divided blocks are divided into a matrix along a first direction and a second direction intersecting the first direction, and each divided block includes a plurality of sensing units; a plurality of first sensing lines connected to the plurality of sensing units of each of the plurality of divided blocks along the first direction; a plurality of second sensing lines connected to the plurality of sensing units of each of the plurality of divided blocks along the second direction; and a sensing driving device connected to the plurality of first sensing lines and the plurality of second sensing lines to drive the plurality of divided blocks, Wherein, the sensing driving device is configured as follows: detecting whether the active pen exists by enabling the plurality of first sensing lines, When the active pen is detected, the coordinates of the active pen are detected by enabling the plurality of first sensing lines and the plurality of second sensing lines, and When the coordinates of the active pen are detected, local sensing is performed by enabling the first sensing line and the second sensing line connected to a specific division block where the active pen is located and a first adjacent division block.

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