Input sensing device and display device including the same

Abstract

The invention relates to an input sensing device and a display device including the same. The input sensing device may include: a driving electrode and a sensing electrode; an analog front end that processes the sensing signal supplied from the sensing electrode and outputs a demodulated signal; a multiplexer connected to the analog front end and selecting one of the demodulation signals; and an analog-to-digital converter that converts the output signal in analog form provided from the multiplexer into a sensing value in digital form. According to the operating mode, sampling rates of the analog-to-digital converters may be different from each other.

Description

Technical Field

[0001] The present invention relates to an input sensing device. More specifically, the present invention relates to an input sensing device with low power consumption and a display device including the same. Background Art

[0002] The display device may include an input sensing device for sensing a user's input such as a touch. The input sensing device may include a sensing area for sensing the user's input and a non-sensing area configured with an input sensing circuit that generates a drive signal for sensing the user's input and receives a sensing signal. The input sensing circuit may include an analog front end for receiving a sensing signal, an analog-to-digital converter for converting an analog sensing signal into a digital sensing value, and the like.

[0003] When there are as many analog front ends and analog-to-digital converters as the number of sensing signals, there may be a limit to reducing the area of ​​the input sensing circuit. In addition, when the sampling rate and resolution of the analog-to-digital converter are the same in the operating mode, the power consumption of the input sensing circuit may be increased unnecessarily. Summary of the invention

[0004] An object of the present invention is to provide an input sensing device with low power consumption.

[0005] An object of the present invention is to provide a display device with low power consumption.

[0006] However, the purpose of the present invention is not limited to such a purpose, and various extensions can be made within the scope not departing from the concept and field of the present invention.

[0007] In order to achieve the above-mentioned one object of the present invention, the input sensing device according to the embodiment may include: a driving electrode and a sensing electrode; an analog front end that processes the sensing signal provided from the sensing electrode and outputs a demodulated signal; a multiplexer that is connected to the analog front end and selects one of the demodulated signals; and an analog-to-digital converter that converts the analog output signal provided by the multiplexer into a digital sensing value. The sampling rates of the analog-to-digital converter may be different from each other according to the working mode.

[0008] In one embodiment, the working mode may include a normal mode and a standby mode. The second sampling rate of the analog-to-digital converter in the standby mode may be lower than the first sampling rate of the analog-to-digital converter in the normal mode.

[0009] In one embodiment, the working mode may further include a low power mode. In the low power mode, the third sampling rate of the analog-to-digital converter may be lower than the second sampling rate.

[0010] In one embodiment, the working mode may further include a high-speed mode. In the high-speed mode, the fourth sampling rate of the analog-to-digital converter may be higher than the first sampling rate.

[0011] In one embodiment, the resolutions of the analog-to-digital converters may be different from each other according to the operation mode.

[0012] In one embodiment, the working mode may include a normal mode and a standby mode. The second resolution of the analog-to-digital converter in the standby mode may be lower than the first resolution of the analog-to-digital converter in the normal mode.

[0013] In one embodiment, the working mode may further include a low power mode. In the low power mode, the third resolution of the analog-to-digital converter may be lower than the second resolution.

[0014] In one embodiment, the working mode may further include a high-speed mode. In the high-speed mode, the fourth resolution of the analog-to-digital converter may be higher than the first resolution.

[0015] In one embodiment, the multiplexer may be connected to the analog front end in a 1:k ratio (k is a natural number greater than 1).

[0016] In one embodiment, each of the analog front ends may include: a charge amplifier for amplifying a corresponding sensing signal in the sensing signals and outputting an amplified signal; and a demodulator for demodulating the amplified signal and outputting a corresponding demodulated signal in the demodulated signals.

[0017] In one embodiment, the demodulator may include: a bandpass filter, which selects a specific frequency band of the amplified signal and outputs a filtered signal; a mixer, which changes the frequency of the filtered signal and outputs a frequency conversion signal; and a low-pass filter, which filters the noise of the frequency conversion signal and outputs the demodulated signal.

[0018] In one embodiment, the input sensing device may further include: a driving signal generating unit for providing a driving signal to the driving electrode; and a signal processing unit for sensing an external input based on the sensing value.

[0019] In order to achieve the above-mentioned one object of the present invention, the input sensing device according to the embodiment may include: driving electrodes and sensing electrodes; an analog front end that processes sensing signals provided from the sensing electrodes and outputs demodulated signals; a multiplexer that is connected to the analog front end and selects one of the demodulated signals; and an analog-to-digital converter that converts the analog output signal provided by the multiplexer into a digital sensing value. The analog-to-digital converter may have different resolutions depending on the operating mode.

[0020] In one embodiment, the working mode may include a normal mode and a standby mode. The second resolution of the analog-to-digital converter in the standby mode may be lower than the first resolution of the analog-to-digital converter in the normal mode.

[0021] In one embodiment, the working mode may further include a low power mode. In the low power mode, the third resolution of the analog-to-digital converter may be lower than the second resolution.

[0022] In one embodiment, the working mode may further include a high-speed mode. In the high-speed mode, the fourth resolution of the analog-to-digital converter may be higher than the first resolution.

[0023] In one embodiment, the multiplexer may be connected to the analog front end in a 1:k ratio (k is a natural number greater than 1).

[0024] In order to achieve the aforementioned one object of the present invention, the display device according to the embodiment may include: a display panel for displaying an image; a driving electrode and a sensing electrode arranged on the display panel; an analog front end for processing a sensing signal provided from the sensing electrode and outputting a demodulated signal; a multiplexer connected to the analog front end and selecting one of the demodulated signals; and an analog-to-digital converter for converting an analog output signal provided from the multiplexer into a sensing value in a digital form. The sampling rates of the analog-to-digital converters may be different from each other depending on the operation mode.

[0025] In one embodiment, the resolutions of the analog-to-digital converters are different from each other according to the operation mode.

[0026] In one embodiment, the multiplexer is connected to the analog front end in a 1:k ratio (k is a natural number greater than 1).

[0027] In the input sensing device and the display device according to the embodiment of the present invention, a plurality of analog front ends are connected to one analog-to-digital converter according to a multiplexer, and the area of ​​the input sensing circuit included in the input sensing device can be reduced. In addition, as the sampling rate and / or resolution of the analog-to-digital converter are different from each other according to the operation mode, the power consumption of the input sensing device can be reduced.

[0028] However, the effects of the present invention are not limited to the aforementioned effects, and can be variously extended within the scope not departing from the concept and field of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 FIG. 1 is a diagram showing an input sensing device according to an embodiment of the present invention.

[0030] Figure 2 It is shown that the Figure 1 A block diagram of a sensing signal receiving unit in an input sensing device.

[0031] Figure 3 is a block diagram illustrating an analog front end according to an embodiment of the present invention.

[0032] Figure 4 A diagram for explaining signal conversion by an analog-to-digital converter.

[0033] Figure 5 A diagram for explaining the sampling rate and resolution of the analog-to-digital converter according to the operation mode.

[0034] Figure 6 is a diagram showing a display device according to an embodiment of the present invention.

[0035] Figure 7 is a cross-sectional view schematically showing a display device according to an embodiment of the present invention.

[0036] Figure 8 is a block diagram showing a display panel and a display driving unit according to an embodiment of the present invention.

[0037] Fig. 9 is a block diagram showing an electronic device according to an embodiment of the present invention.

[0038] (Explanation of Reference Numerals)

[0039] ADC: Analog-to-Digital Converter

[0040] AFE: Analog Front End

[0041] BPF: Band Pass Filter

[0042] CA: Charge Amplifier

[0043] DD: Display Device

[0044] DMD: Demodulator

[0045] DP: Display Panel

[0046] DSP: Signal Processing Unit

[0047] IE1: Driving Electrode

[0048] IE2: Sensing Electrode

[0049] ISD: Input Sensing Device

[0050] LPF: Low Pass Filter

[0051] MUX: Multiplexer

[0052] MX: Mixer

[0053] TXD: drive signal generation unit DETAILED DESCRIPTION

[0054] Hereinafter, an input sensing device and a display device according to an embodiment of the present invention will be described in more detail with reference to the accompanying drawings. The same or similar reference numerals are used for the same components in the accompanying drawings.

[0055] Figure 1 FIG. 4 is a diagram showing an input sensing device ISD according to an embodiment of the present invention.

[0056] Reference Figure 1 The input sensing device ISD may include an input sensing unit ISU and an input sensing circuit IS-C.

[0057] The input sensing unit ISU (or input sensing layer, input sensing panel) may include driving electrodes IE1-1, IE1-2, IE1-3, IE1-4, IE1-5, ... (or first sensing electrodes, transmitting electrodes), sensing electrodes IE2-1, IE2-2, IE2-3, IE2-4, ... (or second sensing electrodes, receiving electrodes), driving signal lines SL1-1, SL1-2, SL1-3, SL1-4, SL1-5, ... (or first signal lines, transmitting signal lines) and sensing signal lines SL2-1, SL2-2, SL2-3SL2-4, ... (or second signal lines, receiving signal lines).

[0058] The driving electrodes IE1-1, IE1-2, IE1-3, IE1-4, IE1-5, ... may extend in the second direction DR2 and may be spaced apart from each other along the first direction DR1. The sensing electrodes IE2-1, IE2-2, IE2-3, IE2-4, ... may extend in the first direction DR1 and may be spaced apart from each other along the second direction DR2.

[0059] The driving signal lines SL1-1, SL1-2, SL1-3, SL1-4, SL1-5, ... may be respectively connected to the driving electrodes IE1-1, IE1-2, IE1-3, IE1-4, IE1-5, ... For example, the first driving signal line SL1-1 may be connected to the first driving electrode IE1-1, and the second driving signal line SL1-2 may be connected to the second driving electrode IE1-2.

[0060] The sensing signal lines SL2-1, SL2-2, SL2-3, SL2-4, ... may be respectively connected to the sensing electrodes IE2-1, IE2-2, IE2-3, IE2-4, ... For example, the first sensing signal line SL2-1 may be connected to the first sensing electrode IE2-1, and the second sensing signal line SL2-2 may be connected to the second sensing electrode IE2-2.

[0061] The input sensing circuit IS-C may include a driving signal generating part TXD, a sensing signal receiving part RXD, and a signal processing part DSP.

[0062] The driving signal generating unit TXD may generate a driving signal TX, and may provide the driving signal TX to the driving electrodes IE1-1, IE1-2, IE1-3, IE1-4, IE1-5, ... Each of the driving signals TX may have an AC voltage such as a sine wave or a square wave. In one embodiment, the driving signals TX may have the same waveform and phase. The driving signals TX may be provided to the driving electrodes IE1-1, IE1-2, IE1-3, IE1-4, IE1-5, ... substantially simultaneously or sequentially.

[0063] According to the driving signal TX provided to the driving electrodes IE1-1, IE1-2, IE1-3, IE1-4, IE1-5, ..., sensing capacitances may be formed between the driving electrodes IE1-1, IE1-2, IE1-3, IE1-4, IE1-5, ... and the sensing electrodes IE2-1, IE2-2, IE2-3, IE2-4, .... For example, a 1-1st sensing capacitance C11 may be formed between the first driving electrode IE1-1 and the first sensing electrode IE2-1, and a 1-2nd sensing capacitance C12 may be formed between the first driving electrode IE1-1 and the second sensing electrode IE2-2.

[0064] In the case of a touch event occurring in a specific area of ​​the input sensing unit ISU, the sensing capacitance between the driving electrode and the sensing electrode located in the specific area may change. For example, in the case of a touch event occurring in the area where the first driving electrode IE1-1 and the first sensing electrode IE2-1 intersect, the size of the 1-1st sensing capacitance C11 between the first driving electrode IE1-1 and the first sensing electrode IE2-1 may change, and the size of the 1-2nd sensing capacitance C12 between the first driving electrode IE1-1 and the second sensing electrode IE2-2 adjacent to the first sensing electrode IE2-1 may not change. Thus, the first sensing signal output from the first sensing signal line SL2-1 may change, the second sensing signal output from the second sensing signal line SL2-2 may not change, and the position where the touch occurs may be detected based on the changed first sensing signal.

[0065] The sensing signal receiving unit RXD may receive sensing signals corresponding to the driving signal TX from the sensing electrodes IE2 - 1 , IE2 - 2 , IE2 - 3 , IE2 - 4 , ... The sensing signal receiving unit RXD may process and convert the sensing signals in analog form and output sensing values ​​in digital form.

[0066] Alternatively, the signal processing unit DSP receives the sensing value from the sensing signal receiving unit RXD, and determines whether a touch occurs or calculates a position where a touch occurs based on the sensing value.

[0067] Figure 2 It is shown that the Figure 1 1 is a block diagram of a sensing signal receiving part RXD in an input sensing device ISD.

[0068] Reference Figure 1 and Figure 2 The sensing signal receiving unit RXD may include analog front ends AFE1, AFE2, ..., AFEn-1, AFEn (n is a natural number greater than 2), multiplexers MUX1, ..., MUXm (m is a natural number greater than 1 and less than n), and analog-to-digital converters ADC1, ..., ADCm.

[0069] The analog front ends AFE1, AFE2, ..., AFEn-1, AFEn can be respectively connected to the sensing signal lines SL2-1, SL2-2, SL2-3, SL2-4, ... The analog front ends AFE1, AFE2, ..., AFEn-1, AFEn can process the sensing signals RX1, RX2, ..., RXn-1, RXn provided from the sensing electrodes IE2-1, IE2-2, IE2-3, IE2-4, ... and output demodulated signals DS1, DS2, ..., DSn-1, DSn.

[0070] Multiplexers MUX1, ..., MUXm can be connected to analog front ends AFE1, AFE2, ..., AFEn-1, AFEn. Multiplexers MUX1, ..., MUXm can be connected to analog front ends AFE1, AFE2, ..., AFEn-1, AFEn in 1:k (k is a natural number greater than 1). For example, the first multiplexer MUX1 can be connected to at least the first analog front end AFE1 and the second analog front end AFE2, and the mth multiplexer MUXm can be connected to at least the n-1th analog front end AFEn-1 and the nth analog front end AFEn. Thus, the number of multiplexers MUX1, ..., MUXm can be less than the number of analog front ends AFE1, AFE2, ..., AFEn-1, AFEn.

[0071] Each of the multiplexers MUX1, ..., MUXm can select one of the demodulated signals provided from the analog front end connected thereto. For example, the first multiplexer MUX1 can select one from the first demodulated signal DS1, the second demodulated signal DS2, etc., and the mth multiplexer MUXm can select one from the nth demodulated signal DSn, the n-1th demodulated signal DSn-1, etc. In one embodiment, each of the multiplexers MUX1, ..., MUXm can sequentially select the demodulated signals provided from the analog front end connected thereto in a time-division manner.

[0072] The analog-to-digital converters ADC1, ..., ADCm can be connected to the multiplexers MUX1, ..., MUXm, respectively. For example, the first analog-to-digital converter ADC1 can be connected to the first multiplexer MUX1, and the mth analog-to-digital converter ADCm can be connected to the mth multiplexer MUXm. Thus, the number of analog-to-digital converters ADC1, ..., ADCm can be less than the number of analog front ends AFE1, AFE2, ..., AFEn-1, AFEn. Therefore, the area of ​​the input sensing circuit IS-C can be reduced, and the power consumption of the input sensing circuit IS-C can be reduced.

[0073] The analog-to-digital converters ADC1, ..., ADCm can convert the analog output signals OS1, ..., OSm provided from the multiplexers MUX1, ..., MUXm into digital sensing values ​​(SV1, ..., SVm). For example, the first analog-to-digital converter ADC1 can convert the analog first output signal OS1 into the digital first sensing value SV1, and the m-th analog-to-digital converter ADCm can convert the analog m-th output signal OSm into the digital m-th sensing value SVm.

[0074] Figure 3 is a block diagram showing an analog front end AFE according to an embodiment of the present invention. Figure 3 The analog front end AFE can correspond to Figure 2 Any one of the analog front ends AFE1, AFE2, …, AFEn-1, AFEn.

[0075] Reference Figure 3 The analog front end AFE may include a charge amplifier CA and a demodulator DMD.

[0076] The charge amplifier CA may receive the sensing signal RX, and may amplify the sensing signal RX to output an amplified signal CA_OUT. The sensing signal RX may correspond to Figure 2 Any one of the sensing signals RX1, RX2, ..., RXn-1, RXn.

[0077] The demodulator DMD can demodulate the amplified signal CA_OUT and output a demodulated signal DS. The demodulator DMD can restore or extract only a signal corresponding to the driving signal TX from the sensing signal RX. The demodulated signal DS can correspond to Figure 2 In one embodiment, the demodulator DMD may include a band pass filter BPF, a mixer MX and a low pass filter LPF.

[0078] The bandpass filter BPF may selectively amplify a specific frequency band of the signal CA_OUT and output a filtered signal BPF_OUT. The bandpass filter BPF may have a first transfer function corresponding to a frequency band of the sensing signal RX and may amplify only signals within the frequency band of the sensing signal RX.

[0079] The mixer MX can change the frequency of the filtered signal BPF_OUT and output a frequency conversion signal MX_OUT. The mixer MX can convert a signal in a relatively high frequency band (i.e., a signal in the frequency band corresponding to the bandpass filter BPF) into a frequency conversion signal MX_OUT in a low frequency band. In addition, the mixer MX can convert noise in a relatively low frequency band into high frequency noise in a high frequency band.

[0080] The low pass filter LPF can filter the noise distributed in the high frequency band of the frequency conversion signal MX_OUT and output the demodulation signal DS. The low pass filter LPF can have a second transfer function corresponding to the frequency band of the frequency conversion signal MX_OUT and can amplify only the frequency conversion signal MX_OUT in the low frequency band and output the demodulation signal DS.

[0081] Figure 4 A diagram for explaining signal conversion by an analog-to-digital converter.

[0082] Reference Figure 4 The analog-to-digital converter samples and quantizes the analog output signal OS and converts it into a digital sensing value.

[0083] The analog-to-digital converter can sample the output signal OS at a certain time interval (sampling period TS). The sampling rate of the analog-to-digital converter can be the reciprocal of the sampling period TS. The more the sampling rate of the analog-to-digital converter increases, the more the processing speed of the analog-to-digital converter can be increased. The more the sampling rate of the analog-to-digital converter decreases, the more the power consumption of the analog-to-digital converter can be reduced.

[0084] The analog-to-digital converter can quantize the sampled output signal OS at a certain quantization interval WQ to generate a sensing value. The resolution RS (or resolution) of the analog-to-digital converter can be inversely proportional to the quantization interval WQ. For example, when the resolution RS of the analog-to-digital converter is n bits, the sampled output signal OS can be converted into a quantization interval WQ with 2 n The higher the resolution RS of the analog-to-digital converter is, the lower the quantization error of the sensed value is, so that the output signal OS can be more accurately converted into the sensed value. The lower the resolution RS of the analog-to-digital converter is, the lower the power consumption of the analog-to-digital converter can be.

[0085] Figure 5 A diagram for explaining the sampling rate and resolution of the analog-to-digital converter according to the operation mode.

[0086] Reference Figure 5 According to the working modes MD1, MD2, MD3, MD4, the sampling rates SR1, SR2, SR3, SR4 and / or the resolutions RS1, RS2, RS3, RS4 of the analog-to-digital converters may be different from each other.

[0087] In one embodiment, the operating modes MD1, MD2, MD3, and MD4 may include a normal mode MD1, a standby mode MD2, a low power mode MD3, and a high speed mode MD4. Figure 1The input sensing device ISD may be switched from the general mode MD1 to the standby mode MD2 when no input such as a user's touch occurs during a certain period of time. The low power mode MD3 may be a mode for minimizing the power consumption of the input sensing device ISD. The high speed mode MD4 may be a mode for quickly and accurately processing the user's input when the electronic device including the input sensing device ISD implements a game application or the like.

[0088] The second sampling rate SR2 of the analog-to-digital converter in the standby mode MD2 may be lower than the first sampling rate SR1 of the analog-to-digital converter in the general mode MD1. In one embodiment, the first sampling rate SR1 may be about 2 MHz and the second sampling rate SR2 may be about 1 MHz. The second resolution RS2 of the analog-to-digital converter in the standby mode MD2 may be lower than the first resolution RS1 of the analog-to-digital converter in the general mode MD1. In one embodiment, the first resolution RS1 may be 12 bits and the second resolution RS2 may be smaller than 12 bits. Thus, in the standby mode MD2, the power consumption of the analog-to-digital converter may be reduced.

[0089] In low power mode MD3, the third sampling rate SR3 of the analog-to-digital converter may be lower than the second sampling rate SR2. In one embodiment, the third sampling rate SR3 may be about 0.5 MHz to about 1.0 MHz. In low power mode MD3, the third resolution RS3 of the analog-to-digital converter may be lower than the second resolution RS2. In one embodiment, the third resolution RS3 may be smaller than about 12 bits. Thus, in low power mode MD3, the power consumption of the analog-to-digital converter may be further reduced.

[0090] In high-speed mode MD4, the fourth sampling rate SR4 of the analog-to-digital converter may be higher than the first sampling rate SR1. In one embodiment, the fourth sampling rate SR4 may be about 4 MHz. In high-speed mode MD4, the fourth resolution RS4 of the analog-to-digital converter may be higher than the first resolution RS1. In one embodiment, the fourth resolution RS4 may be larger than 12 bits and smaller than or the same as 16 bits. Thus, in high-speed mode MD4, the processing speed for the user's input and the accuracy of the sensed value may be increased.

[0091] Figure 6 is a diagram showing a display device DD according to an embodiment of the present invention.

[0092] Reference Figure 6 The display device DD may include a panel PNL and a driving circuit portion DV. The driving circuit portion DV may drive the panel PNL.

[0093] The panel PNL may include a display panel DP and an input sensing unit ISU. The display panel DP may display an image. The input sensing unit ISU may sense an input such as a user's touch. The input sensing unit ISU may correspond to Figure 1 Input sensing unit ISU.

[0094] The driving circuit portion DV may include a display driving portion DDV and an input sensing circuit IS-C (or a sensing driving portion). The display driving portion DDV may drive the display panel DP. The input sensing circuit IS-C may drive the input sensing unit ISU. The input sensing circuit IS-C may correspond to Figure 1 The input sensing circuit IS-C.

[0095] In one embodiment, the display panel DP and the input sensing unit ISU may be combined after being manufactured separately from each other. In one embodiment, the display panel DP and the input sensing unit ISU may be manufactured as one body. For example, the input sensing unit ISU may be directly formed on the display panel DP.

[0096] The display panel DP may include a display substrate DSUB, scan lines SL, data lines DL, and pixels PXL.

[0097] The display substrate DSUB may include a display area DA and a non-display area NDA. An image may be displayed in the display area DA, and the non-display area NDA may be adjacent to the display area DA. In one embodiment, the display area DA may be configured in the central area of ​​the display substrate DSUB, and the non-display area NDA may be disposed in the edge area of ​​the display substrate DSUB in a manner of surrounding the display area DA.

[0098] The display substrate DSUB may be a rigid substrate or a flexible substrate. For example, the display substrate DSUB may be a rigid substrate including glass or tempered glass, or a flexible substrate including a film of plastic or metal material.

[0099] The scan lines SL, the data lines DL, and the pixels PXL may be arranged in the display area DA. The scan lines SL may extend in the second direction DR2 and may be arranged to be spaced apart from each other along the first direction DR1. The data lines DL may extend in the first direction DR1 and may be spaced apart from each other along the second direction DR2. The pixels PXL may be connected to the scan lines SL and the data lines DL. The pixels PXL may emit light corresponding to the data signals provided from the data lines DL by being selected by the scan signals provided from the scan lines SL. Thus, an image corresponding to the data signals may be displayed in the display area DA.

[0100] The input sensing unit ISU may include a base layer BSL, a driving electrode IE1 , and a sensing electrode IE2 .

[0101] The base layer BSL may include a sensing area SA and a non-sensing area NSA. The sensing area SA may sense the user's input, and the non-sensing area NSA may be adjacent to the sensing area SA. In one embodiment, the sensing area SA may overlap with the display area DA, and the non-sensing area NSA may overlap with the non-display area NDA. In this case, when the user's input is provided to the display area DA, the touch input may be detected by the input sensing unit ISU.

[0102] The driving electrodes IE1 and the sensing electrodes IE2 may be disposed in the sensing area SA on the base layer BSL. In one embodiment, each of the driving electrodes IE1 may have a driving chip and a driving bridge alternately connected along the second direction DR2. Figure 6 The driving chip is shown to have a diamond shape, but the driving chip may have a circular, quadrilateral, triangular, grid shape, etc. In one embodiment, each of the sensing electrodes IE2 may have a form in which sensing chips and sensing bridges are alternately connected along the first direction DR1. Figure 6 The sensing chip is shown to have a diamond shape, but the sensing chip may have a circular, quadrilateral, triangular, grid shape, or the like.

[0103] Figure 7 FIG. 1 is a cross-sectional view schematically showing a display device DD according to an embodiment of the present invention.

[0104] Reference Figure 7 , an input sensing unit ISU may be configured on the display panel DP, and a window WD may be configured on the input sensing unit ISU (or the panel PNL).

[0105] In one embodiment, the display panel DP may be a self-luminous display panel. For example, the display panel DP may be an organic light-emitting display panel, an inorganic light-emitting display panel, a quantum-dot / well light-emitting display panel, etc. In one embodiment, the display panel DP may be a non-self-luminous display panel. For example, the display panel DP may be a liquid crystal display panel, etc. In the case where the display panel DP is a non-self-luminous display panel, the display device DD may further include a light source such as a backlight unit.

[0106] The input sensing unit ISU may obtain information about the user's input. In one embodiment, the input sensing unit ISU may sense the user's input using a capacitive sensing method. For example, the input sensing unit ISU may sense the user's input using a mutual capacitive method or a self-capacitive method.

[0107] The window WD may protect the panel PNL and may transmit light. The window WD may have a multi-layer structure selected from a glass substrate, a plastic film, a plastic substrate, etc. The window WD may include a rigid or flexible substance.

[0108] Although not in Figure 7 As shown, the display device DD may further include a window WD and a polarizing plate disposed between the input sensing units ISU, etc. The polarizing plate may prevent reflection of external light passing through the window WD.

[0109] Figure 8 is a block diagram showing a display panel DP and a display driving part DDV according to an embodiment of the present invention.

[0110] Reference Figure 8 The display driving unit DDV may include a timing control unit 11 and a data driving unit 12 , and the display panel DP may include a scanning driving unit 13 and a pixel array 14 .

[0111] The timing control unit 11 may receive input image data and input control signals from an external device (eg, a processor). The input control signals may include a vertical synchronization signal, a horizontal synchronization signal, a data enable signal, and the like.

[0112] The data driving part 12 may generate a data signal based on the output image data and the data control signal provided from the timing control part 11. The data driving part 12 may output the data signal to the data lines DL1, DL2, DL3, DL4, . . .

[0113] The scan driver 13 may generate a scan signal based on a scan start signal and a scan clock signal provided from the timing controller 11. The scan driver 13 may sequentially output the scan signal to the scan lines SL1, SL2, ... The scan driver 13 may include a scan stage formed in the form of a shift register.

[0114] The pixel array 14 may include pixels PXL. The pixel PXL may include a first pixel emitting light of a first hue, a second pixel emitting light of a second hue, and a third pixel emitting light of a third hue. The first hue, the second hue, and the third hue may be different hues from each other. In one embodiment, the first hue, the second hue, and the third hue may be red, green, and blue, respectively. In one embodiment, the first hue, the second hue, and the third hue may be magenta, cyan, and yellow, respectively.

[0115] Fig. 9 is a block diagram showing an electronic device 1000 according to an embodiment of the present invention.

[0116] Reference Fig. 9 , the electronic device 1000 may include a processor 1010, a memory device 1020, a storage device 1030, an input / output device 1040, a power supply 1050, and a display device 1060. The display device 1060 may correspond to Figures 6 to 8 The electronic device 1000 may further include various ports that can communicate with a graphics card, a sound card, a memory card, a USB device, etc. or can communicate with other systems.

[0117] The processor 1010 can perform specific calculations or tasks. In one embodiment, the processor 1010 can be a microprocessor, a central processing unit (CPU), etc. The processor 1010 can be connected to other components through an address bus, a control bus, a data bus, etc. In one embodiment, the processor 1010 can also be connected to an expansion bus such as a peripheral component interconnect (PCI) bus. In one embodiment, the processor 1010 can provide input image data and input control signals to the display device 1060.

[0118] The memory device 1020 can store data required for the operation of the electronic device 1000 . For example, the memory device 1020 may include a non-volatile memory device such as an erasable programmable read-only memory (EPROM) device, an electrically erasable programmable read-only memory (EEPROM) device, a flash memory device, a phase change random access memory (PRAM) device, a resistance random access memory (RRAM) device, a nano floating gate memory (NFGM) device, a polymer random access memory (PoRAM) device, a magnetic random access memory (MRAM) device, a ferroelectric random access memory (FRAM) device, and / or a volatile memory device such as a dynamic random access memory (DRAM) device, a static random access memory (SRAM) device, and a mobile DRAM device.

[0119] The storage device 1030 may include a solid state drive (SSD), a hard disk drive (HDD), a CD-ROM, etc. The input and output device 1040 may include input components such as a keyboard, a numeric keypad, a touch pad, a touch screen, a mouse, and output components such as a speaker and a printer. The power supply 1050 may supply the required power for the operation of the electronic device 1000. The display device 1060 may be connected to other components through the bus or other communication links.

[0120] The display device according to an embodiment of the present invention can be applied to display devices included in computers, notebooks, mobile phones, smart phones, smart tablets, smart watches, personal multimedia players (PMPs), personal digital assistants (PDAs), MP3 players, etc.

[0121] The input sensing device and the display device according to the present invention are described above with reference to the accompanying drawings, but the aforementioned embodiments are illustrative only, and a person having ordinary knowledge in the technical field can make modifications and changes without departing from the scope of the technical concept of the present invention described in the attached claims.

Claims

1. An input sensing device, wherein: include: driving electrodes and sensing electrodes; An analog front end, processing a sensing signal provided by the sensing electrode and outputting a demodulated signal; a multiplexer connected to the analog front end and selecting one of the demodulated signals; as well as an analog-to-digital converter, converting the output signal in analog form provided from the multiplexer into a sensed value in digital form, Depending on the operating mode, the sampling rates of the analog-digital converters differ from one another.

2. The input sensing device according to claim 1, wherein: The working modes include a normal mode and a standby mode. A second sampling rate of the analog-to-digital converter in the standby mode is lower than a first sampling rate of the analog-to-digital converter in the normal mode.

3. The input sensing device according to claim 2, wherein: The operating modes also include a low power mode, In the low power mode, a third sampling rate of the analog-to-digital converter is lower than the second sampling rate.

4. The input sensing device according to claim 3, wherein: The working mode also includes a high-speed mode, In the high speed mode, a fourth sampling rate of the analog-to-digital converter is higher than the first sampling rate.

5. The input sensing device according to claim 1, wherein: Depending on the operating mode, the resolutions of the analog-digital converters differ from each other.

6. The input sensing device according to claim 5, wherein: The working modes include a normal mode and a standby mode. A second resolution of the analog-to-digital converter in the standby mode is lower than a first resolution of the analog-to-digital converter in the general mode.

7. The input sensing device according to claim 6, wherein: The operating modes also include a low power mode, In the low power mode, a third resolution of the analog-to-digital converter is lower than the second resolution.

8. The input sensing device according to claim 7, wherein: The working mode also includes a high-speed mode, In the high speed mode, a fourth resolution of the analog-to-digital converter is higher than the first resolution.

9. The input sensing device according to claim 1, wherein: The multiplexer is connected to the analog front end in a 1:k ratio, where k is a natural number greater than 1.

10. The input sensing device according to claim 1, wherein: Each of the analog front ends comprises: a charge amplifier, amplifying a corresponding sensing signal among the sensing signals and outputting an amplified signal; and A demodulator demodulates the amplified signal and outputs a corresponding demodulated signal among the demodulated signals.

11. The input sensing device according to claim 10, wherein: The demodulator comprises: a bandpass filter that selects a specific frequency band of the amplified signal and outputs a filtered signal; a mixer that changes the frequency of the filtered signal to output a frequency converted signal; and A low-pass filter filters the noise of the frequency conversion signal and outputs the demodulated signal.

12. The input sensing device according to claim 1, wherein: The input sensing device further comprises: a driving signal generating unit for providing a driving signal to the driving electrode; and The signal processing unit senses an external input based on the sensing value.

13. An input sensing device, wherein: include: driving electrodes and sensing electrodes; An analog front end, processing a sensing signal provided by the sensing electrode and outputting a demodulated signal; a multiplexer connected to the analog front end and selecting one of the demodulated signals; as well as an analog-to-digital converter, converting the output signal in analog form provided from the multiplexer into a sensed value in digital form, Depending on the operating mode, the resolutions of the analog-digital converters differ from one another.

14. The input sensing device according to claim 13, wherein: The working modes include a normal mode and a standby mode. A second resolution of the analog-to-digital converter in the standby mode is lower than a first resolution of the analog-to-digital converter in the general mode.

15. The input sensing device according to claim 14, wherein: The operating modes also include a low power mode, In the low power mode, a third resolution of the analog-to-digital converter is lower than the second resolution.

16. The input sensing device according to claim 15, wherein: The working mode also includes a high-speed mode, In the high speed mode, a fourth resolution of the analog-to-digital converter is higher than the first resolution.

17. The input sensing device according to claim 13, wherein: The multiplexer is connected to the analog front end in a 1:k ratio, where k is a natural number greater than 1.

18. A display device, wherein: include: A display panel for displaying images; The driving electrodes and the sensing electrodes are arranged on the display panel; An analog front end, processing a sensing signal provided by the sensing electrode and outputting a demodulated signal; a multiplexer connected to the analog front end and selecting one of the demodulated signals; as well as an analog-to-digital converter, converting the output signal in analog form provided from the multiplexer into a sensed value in digital form, Depending on the operating mode, the sampling rates of the analog-digital converters differ from one another.

19. The display device according to claim 18, wherein: Depending on the operating mode, the resolutions of the analog-digital converters differ from each other.

20. The display device according to claim 18, wherein: The multiplexer is connected to the analog front end in a 1:k ratio, where k is a natural number greater than 1.

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