Timing controller and driving method thereof

Abstract

The present application relates to a timing controller and a driving method thereof. A timing controller capable of operating in a low power mode during a touch sensor driving period according to one aspect of the present disclosure includes a receiver that receives a timing synchronization signal and video image data from an external source, a data processor that generates a gate control signal and a data control signal based on the timing synchronization signal and arranges the video image data as pixel data for a display panel, and a transmitter that operates in a normal mode during a display driving period to output the pixel data, the gate control signal, and the data control signal and operates in the low power mode for at least some of the touch sensor driving period.

Description

Technical Field

[0001] This disclosure relates to timing controllers and driving methods thereof, and more specifically, to timing controllers and driving methods thereof with reduced power consumption. Background Technology

[0002] With the advancement of the information age, the demand for display devices for displaying images has increased in various forms. As a result, various types of display devices have recently been used, such as non-self-emissive display devices including liquid crystal display (LCD) devices and plasma display panel (PDP) devices, and electroluminescent display devices including organic light-emitting display (OLED) devices and quantum dot light-emitting display (QLED) devices.

[0003] Recently, display devices have been developed as touch display devices, including touchscreens capable of recognizing user touches. Typically, such as... Figure 1A or Figure 1B As shown, a touch display device integrating a touch screen and a display panel can be driven by dividing a frame time period 1F into a display driving period (DP) DP1 to DPn for outputting input image data to the display panel and a touch sensor driving period (TP) TP1 to TPm for driving the touch sensor to detect touch information.

[0004] In time-division multiplexing touch display devices, the timing controller outputs digital image data to the data driving circuit during the display driving period. Furthermore, although the timing controller of a time-division multiplexing touch display device does not need to operate during the touch sensor driving period, it remains on and outputs dummy image data to the data driving circuit. Therefore, conventional touch display devices suffer from unnecessary power consumption. Summary of the Invention

[0005] Therefore, this disclosure aims to solve the above problems and provide a timing controller and driving method thereof that can operate in a low-power mode during the touch sensor driving period.

[0006] Furthermore, this disclosure aims to provide a timing controller and its driving method that can prevent data loss.

[0007] To achieve the above objectives, a timing controller according to one aspect of the present disclosure includes: a receiver that receives a timing synchronization signal and video image data; a data processor that generates a gating control signal and a data control signal based on the timing synchronization signal and arranges the video image data into pixel data for a display panel; and a transmitter that operates in a normal mode during a display driving period to output the pixel data, the gating control signal, and the data control signal, and operates in a low-power mode for at least a portion of a touch sensor driving period.

[0008] To achieve the above objectives, a timing controller according to another aspect of this disclosure includes: a clock generator that receives a reference clock signal and generates a first clock signal; a transmission link that synchronizes pixel data and data control signals with the first clock signal and outputs synchronized pixel data and synchronized data control signals; and a transmitter that is activated during a display driving period to output pixel data and data control signals to a data driver of the display panel, and is deactivated for at least some time during a touch sensor driving period.

[0009] To achieve the above objectives, a method for driving a timing controller according to another aspect of this disclosure includes: generating a first timing synchronization signal by a touch synchronization signal generator, the first timing synchronization signal dividing a frame time period into a display driving period and a touch sensor driving period; when a high-level first timing synchronization signal is generated, a transmitter operates in a normal mode to output pixel data, a strobe control signal, and a data control signal to a data driver of the display panel; and when a low-level first timing synchronization signal is generated, the transmitter operates in a low-power mode. Attached Figure Description

[0010] The accompanying drawings are included to provide a further understanding of this disclosure and are incorporated in and constitute a part of this application. The drawings illustrate embodiments of the disclosure and, together with the description, serve to explain the principles of the disclosure. In the drawings:

[0011] Figure 1A and Figure 1B This is a diagram illustrating the display driving period and touch sensor driving period within a frame during time-sharing operation of a typical touch display device;

[0012] Figure 2 This is a block diagram illustrating a touch display device according to one embodiment of the present disclosure;

[0013] Figure 3 This is a schematic block diagram illustrating the construction of a timing controller according to one embodiment of the present disclosure;

[0014] Figure 4 It is used to describe in Figure 3 The diagram shows the transmission and reception of signals between the clock generator, transmission link, transmitter, on / off controller, and touch synchronization signal generator.

[0015] Figure 5 This is a diagram illustrating an example of the waveform of the signal output from the timing controller;

[0016] Figure 6 This is another example of a waveform illustrating the signal output from the timing controller;

[0017] Figure 7 This is an example Figure 4 A diagram of another example of the transmitter shown;

[0018] Figure 8 This illustrates waveforms showing the sequential activation of multiple first data transmission units; and

[0019] Figure 9 This is a flowchart illustrating a driving method for a timing controller according to one embodiment of the present disclosure. Detailed Implementation

[0020] The present disclosure will now be described in detail with reference to exemplary embodiments thereof, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings to refer to the same or similar components.

[0021] The shapes, dimensions, scales, angles, and quantities shown in the accompanying drawings to describe embodiments of the present disclosure are merely examples, and therefore the present disclosure is not limited to the details shown. Similar reference numerals always refer to similar elements. In the following description, detailed descriptions of related known technologies will be omitted where they are determined to unnecessarily obscure the essential points of the present disclosure.

[0022] When using the terms "comprising," "having," and "including" as described in this specification, another component may be added unless "only" is used. Unless the opposite is mentioned, singular terms may include plural forms.

[0023] When describing temporal relationships, such as when time sequence is described as “after,” “following,” “next,” and “before,” discontinuous cases may be included unless “exactly” or “immediately following” is used.

[0024] It will be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this disclosure, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0025] The term “at least one” should be understood to include any and all combinations of one or more of the related listed items. For example, “at least one of the first, second and third items” means a combination of all items derived from two or more of the first, second and third items, as well as the first, second or third item.

[0026] Features of the various embodiments of this disclosure can be partially or wholly linked or combined with each other, and can be technically interoperable and driven in various ways. Embodiments of this disclosure can be implemented independently of each other, or they can be implemented together in a mutually dependent relationship.

[0027] In the following description, exemplary embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0028] Figure 2 This is a block diagram illustrating a touch display device according to one embodiment of the present disclosure.

[0029] According to one embodiment of the present disclosure, the touch display device 200 performs display functions and touch sensing functions, and can be implemented as a flat panel display device such as a liquid crystal display (LCD) device or an organic light-emitting diode (OLED) display device.

[0030] The touch display device 200 according to this disclosure may include a capacitive touchscreen to sense touch from a conductive object such as a finger or an active pen. The touchscreen may be implemented independently of a display panel used for display, or may be implemented as a touch sensor (or touch electrode) embedded in a pixel array of the display panel.

[0031] like Figure 2 As shown, the touch display device 200 according to this disclosure includes a host system 210, a display panel 205, and a display driving device for driving the display panel 205. The display panel 205 displays an image in a predetermined grayscale or receives touch from a finger or an active pen. In one example, the display panel 205 may be a display panel having an in-cell touch-type structure using a capacitance method. According to such an example, the display panel 205 may be an in-cell touch-type display panel using a self-capacitance method or a mutual capacitance method. Hereinafter, for the sake of convenience, it is assumed that the display panel 205 is described as an in-cell touch-type display panel using a self-capacitance method.

[0032] The display panel 205 operates in display mode and touch sensing mode. During the display driving period, the display panel 205 operates in display mode to display images, and during the touch sensor driving period, it operates in touch sensing mode to function as a touch panel for touch sensing.

[0033] In one example, it can be like... Figure 1A The display driving period (DP) set for a frame is shown, or within such a period of time. Figure 1B The diagram shows the operation of the display mode within each of the multiple display driver periods DP1 to DPn set for a single frame. Additionally, it can be performed as follows: Figure 1A The touch sensor driving time period TP set for a frame is shown, or in the context of... Figure 1BThe diagram illustrates the operation of a touch sensing mode within each of multiple touch sensor driving periods TP1 to TPm, set between multiple display driving periods DP1 to DPn, for a single frame. In this case, to achieve high resolution, for a single frame, the length of the display driving period DP can be set to be greater than the length of the touch sensor driving period TP, or the number of display driving periods DP1 to DPn can be set to be greater than the number of touch sensor driving periods TP1 to TPm.

[0034] The display panel 205 includes multiple data lines D1 to Dn, multiple gate lines G1 to Gm, multiple pixels P, multiple touch sensors TE, and multiple touch lines T1 to Tk. Each of the multiple data lines D1 to Dn receives a data signal in display mode. Each of the multiple gate lines G1 to Gm receives a gate signal in display mode. The multiple data lines D1 to Dn and the multiple gate lines G1 to Gm are configured to intersect each other on the substrate to define multiple pixel regions. Each of the multiple pixels P may include a thin-film transistor (not shown) connected to adjacent gate lines and data lines, a pixel electrode (not shown) connected to the thin-film transistor, and a storage capacitor (not shown) connected to the pixel electrode.

[0035] Each of the multiple touch sensors TE can be used as a touch electrode to sense the touch of a finger or active pen, or as a common electrode to generate an electric field together with pixel electrodes to drive the liquid crystal. That is, each of the multiple touch sensors TE can be used as a touch electrode in touch sensing mode and as a common electrode in display mode.

[0036] Since each of the multiple touch sensors TE functions as a self-capacitance touch sensor in touch sensing mode, each of the multiple touch sensors TE should have a size larger than the minimum contact size between the touch object and the display panel 205. Therefore, each of the multiple touch sensors TE can have a size corresponding to the size of one or more pixels P. In one example, the multiple touch sensors TE can be arranged at predetermined intervals along multiple horizontal lines and multiple vertical lines.

[0037] Each of the multiple touch lines T1 to Tk can be individually connected to one of the multiple touch sensors TE. Figure 1A The display driving time period DP shown is within or during a frame period. Figure 1B During the display driving periods DP1 to DPn, each of the multiple touch lines T1 to Tk can provide a common voltage Vcom to the corresponding touch sensor TE.

[0038] In the display driving device, data signals are provided to a plurality of pixels P included in the display panel 205 to display images through the display panel 205 during display driving periods DP1 to DPn (hereinafter referred to as DP), and touch is sensed by the touch sensor TE during touch sensor driving periods TP1 to TPm (hereinafter referred to as TP).

[0039] For this purpose, the display driver may include a data driver 212, a strobe driver 214, a timing controller 216, a touch driver 218, a touch controller 220, and a power supply 215.

[0040] The data driver 212 can receive pixel data PDATA and data control signal DCS from the timing controller 216 during the display driving period DP.

[0041] In one example, data driver 212 can receive clock embedded data signaling (CEDS) packets from timing controller 216 and obtain clock signals, data control signals DCS, and pixel data PDATA from the CEDS packets. In this case, the CEDS packets can represent packets with clocks embedded between multiple data lines.

[0042] In the following description, for the sake of convenience, it will be described that the data driver 212 receives a CEDS packet including pixel data PDATA and data control signal DCS from the timing controller 216, but this disclosure is not necessarily limited thereto. The data driver 212 may also receive each of the pixel data PDATA and data control signal DCS from the timing controller 216.

[0043] The data driver 212 can convert pixel data PDATA in digital form into analog positive / negative data signals according to the data control signal DCS, and provide the analog positive / negative data signals to the pixel P through multiple data lines D1 to Dn.

[0044] Therefore, such as Figure 2 As shown, data driver 212 may include multiple source driver integrated circuits (ICs) SDICs. In one example, the source driver ICs SDICs may be cascaded. The source driver ICs SDICs can be connected to timing controller 216 in a point-to-point manner via multiple wiring pairs and receive CEDS packets from timing controller 216.

[0045] The gating driver 214 can receive the gating control signal GCS from the timing controller 216 during the display driving period DP. The gating driver 214 can provide gating signals to the gating lines G1 to Gm according to the gating control signal GCS.

[0046] Specifically, during the display driving period DP, the gating driver 214, under the control of the timing controller 216, generates a gating signal (or scan signal) synchronized with the data signal, shifts the generated gating signal, and sequentially provides the shifted gating signal to the gating lines G1 to Gm. For this purpose, the gating driver 214 may include multiple gating driver ICs (not shown). During the display driving period DP, the gating driver ICs, under the control of the timing controller 216, sequentially provide the gating signal synchronized with the data signal to the gating lines G1 to Gm to select the data line to which the data signal is applied. The gating signal can oscillate between high gating voltage and low gating voltage.

[0047] The timing controller 216 can receive digital video data VDATA and timing synchronization signals TSS from the host system 210. The timing synchronization signals TSS may include a reference clock signal (e.g., a dot clock), a vertical synchronization signal, a horizontal synchronization signal, a data enable signal, etc. The vertical synchronization signal defines a frame time period. The horizontal synchronization signal defines a horizontal time period required to provide data signals to pixels P in a horizontal row of the display panel 205. The data enable signal defines a time period for inputting valid data. The dot clock is a signal that repeats at predetermined short intervals.

[0048] In order to control the operation timing of the data driver 212 and the gating driver 214, the timing controller 216 can generate a data control signal DCS to control the operation timing of the data driver 212 and a gating control signal GCS to control the operation timing of the gating driver 214 based on the timing synchronization signal TSS.

[0049] During the display driving period DP, the timing controller 216 can operate in normal mode while simultaneously outputting pixel data PDATA and data control signal DCS to the data driver 212 and gating control signal GCS to the gating driver 214. Furthermore, the timing controller 216 can operate in low-power mode for at least a portion of the touch sensor driving period TP. (See below for reference.) Figures 2 to 8 Describe the specific driving method of the timing controller 216.

[0050] The host system 210 can convert digital video data VDATA into a format suitable for display on the display panel 205. The host system 210 can send a timing synchronization signal TSS along with the digital video data VDATA to the timing controller 216. The host system 210 can function as one of a television system, set-top box, navigation system, digital video disc (DVD) player, Blu-ray player, electronic board, kiosk system, personal computer (PC), home theater system, and telephone system, and receive input images.

[0051] In addition, the host system 210 can receive touch input coordinates from the touch controller 220 and execute an application associated with the touch input coordinates.

[0052] The touch driver 218 can drive the touch sensor TE during the touch sensor driving period TP to obtain touch sensing data from the touch sensor TE. For this purpose, the touch driver 218 may include multiple readout ICs ROIC.

[0053] In one example, where the display panel 205 is implemented as a mutual capacitance type, the readout IC ROIC may include a driving circuit and a sensing circuit. The driving circuit generates a touch driving signal for driving the touch sensor TE and provides a touch driving signal to each touch sensor TE through each of the touch lines T1 to Tk. The sensing circuit senses the capacitance change of each touch sensor TE through each of the touch lines T1 to Tk and generates raw touch data.

[0054] In another example, where the display panel 205 is implemented as a self-capacitance type, the readout IC ROIC can provide a touch drive signal to each touch sensor TE and use a circuit to obtain a touch sensing signal from each touch sensor TE.

[0055] Furthermore, the readout IC ROIC can provide a common voltage to each touch sensor TE through each of the touch lines T1 to Tk during the display driving period DP. Therefore, the touch sensor TE can be used as a common electrode during the display driving period.

[0056] In addition, in the above example, the source driver IC SDIC and the readout IC ROIC have been implemented separately. In another example, the source driver IC SDIC and the readout IC ROIC can also be implemented as a type where the source driver IC SDIC and the readout IC ROIC are integrated into a single chip SRIC.

[0057] Touch controller 220 can receive touch sensing data from touch driver 218. Touch controller 220 can calculate the coordinates of the touch input position according to the touch coordinate calculation method, and output the coordinate information of the touch input position to host system 210. Touch controller 220 can be implemented as a microcontroller unit (MCU).

[0058] Power supply 215 can use power supplied from external host system 210 to generate the driving power required to drive display panel 205. Specifically, power supply 215 can use power supplied from host system 210 to generate power supply VCC required to drive timing controller 216, and supply power supply VCC to timing controller 216. In addition, power supply 215 can generate DC power supply VCCD, AC power supply VCCA, and common voltage VCOM required to drive display panel 205, and supply DC power supply VCCD, AC power supply VCCA, and common voltage VCOM to display panel 205.

[0059] Figure 3 This is a schematic block diagram illustrating the construction of a timing controller according to one embodiment of the present disclosure, and Figure 4 It is used to describe in Figure 3 The diagram shows the transmission and reception of signals between the clock generator, transmission link, transmitter, on / off controller, and touch synchronization signal generator. Figure 5 This is a diagram illustrating an example of the waveform of the signal output from the timing controller. Figure 6 This is another example of a waveform illustrating the signal output from a timing controller.

[0060] Reference Figures 3 to 6 The timing controller 216 includes a receiver 310, a data processor 320, a clock generator 330, a transmission link 340, a transmitter 350, an on / off controller 360, and a touch synchronization signal generator 370.

[0061] Receiver 310 receives digital video data VDATA and timing synchronization signal TSS from external host system 210. The timing synchronization signal TSS may include a reference clock signal, vertical synchronization signal, horizontal synchronization signal, data enable signal, point clock, etc.

[0062] The data processor 320 can use the timing synchronization signal TSS to generate the data control signal DCS that controls the operation timing of the data driver 212 and the gating control signal GCS that controls the operation timing of the gating driver 214.

[0063] Additionally, the data processor 320 can arrange digital video data VDATA to match the pixel structure generated in the display panel 205, thereby converting it into pixel data PDATA. As an example, the data processor 320 can use a predetermined conversion method to convert and arrange digital video data VDATA of three colors (red, green, and blue) into pixel data PDATA of four colors (white, red, green, and blue). Furthermore, the data processor 320 can also process the pixel data PDATA using various image processing methods such as image quality compensation, external compensation, and degradation compensation.

[0064] The data processor 320 can output pixel data PDATA, data control signal DCS, and gating control signal GCS to the transmission link 340.

[0065] Clock generator 330 can receive a reference clock signal to generate a first clock signal CLK. Clock generator 330 can provide the first clock signal CLK to transmission link 340 and transmitter 350.

[0066] Transmission link 340 can receive a first clock signal CLK from clock generator 330. Transmission link 340 can synchronize pixel data PDATA, data control signal DCS, and strobe control signal GCS with the first clock signal CLK. Transmission link 340 can transmit the synchronized pixel data PDATA, data control signal DCS, and strobe control signal GCS to transmitter 350. In this case, the pixel data PDATA transmitted to transmitter 350 can be parallel data with "j+1" bits (j is an integer greater than or equal to 1).

[0067] Transmitter 350 can receive pixel data PDATA, data control signal DCS, and strobe control signal GCS from transmission link 340, and send the data and control signals to data driver 212 or strobe driver 214. For this purpose, as follows... Figure 4 As shown, the transmitter 350 may include a first data transmission unit 420, a phase-locked loop (PLL) 430, and a second data transmission unit 440.

[0068] PLL 430 can receive the first clock signal CLK from clock generator 330 and generate a second clock signal. PLL 430 can provide the second clock signal to the first data transmission unit 420.

[0069] The first data transmission unit 420 can convert pixel data PDATA from parallel data to serial data, and output the converted serial pixel data PDATA and data control signal DCS to the data driver 212. In one example, the first data transmission unit 420 can output a CEDS packet including pixel data PDATA, data control signal DCS, and a second clock signal to the data driver 212. In this case, the CEDS packet can be generated by inserting the data control signal DCS and the second clock signal between multiple pixel data PDATA that have been converted to serial data.

[0070] The second data transmission unit 440 can output a gating control signal GCS to the gating driver 214.

[0071] In a timing controller 216 according to one embodiment of the present disclosure, a clock generator 330, a transmission link 340, and a transmitter 350 may operate in a normal mode or a low-power mode depending on the driving period.

[0072] According to one embodiment of this disclosure, the timing controller 216 can operate the clock generator 330, transmission link 340, and transmitter 350 in normal mode during the display driving period DP. The timing controller 216 can output pixel data PDATA, data control signal DCS, and strobe control signal GCS.

[0073] Furthermore, in a timing controller 216 according to one embodiment of this disclosure, at least one of the clock generator 330, transmission link 340, and transmitter 350 may operate in a low-power mode for a portion of the touch sensor driving period TP. In this case, the timing controller 216 may not output pixel data PDATA, data control signal DCS, and strobe control signal GCS.

[0074] More specifically, the touch synchronization signal generator 370 can generate a touch synchronization signal Tsync, which divides a frame 1F time period into a display driving period DP and a touch sensor driving period TP according to the timing of the vertical synchronization signal and the timing of the internal data enable signal. The touch synchronization signal Tsync can be a mode selection signal for operating the display panel 205 in display mode or touch sensing mode.

[0075] The touch synchronization signal generator 370 can divide each frame time of the display panel 205 into at least two sub-frames based on the vertical synchronization signal and the internal data enable signal, and generate a touch synchronization signal Tsync for each sub-frame to drive the display panel 205 in display mode or touch sensing mode.

[0076] The touch synchronization signal generator 370 can provide the generated touch synchronization signal Tsync to the on / off controller 360 and the touch controller 220.

[0077] exist Figure 3 and Figure 4 The illustration shows a timing controller 216 generating a touch synchronization signal Tsync, but this disclosure is not limited to this. The touch synchronization signal Tsync can also be generated in the touch controller 220.

[0078] The on / off controller 360 can control at least one of the clock generator 330, transmission link 340 and transmitter 350 to be activated or deactivated, or to receive or not receive power, based on the level of the touch synchronization signal Tsync.

[0079] In one example, the on / off controller 360 can control the transmitter 350 and the power supply 215 to connect or disconnect based on the level of the touch synchronization signal Tsync. When the touch synchronization signal Tsync is low, the on / off controller 360 can determine the operating mode of the timing controller 216 to low-power mode and control the transmitter 350 and the power supply 215 to connect.

[0080] Specifically, transmitter 350 may include a switch that connects and disconnects with power supply 215, which provides power VCC. On / off controller 360 can generate a transmission switch control signal Tx_CS based on the level of touch synchronization signal Tsync to control the switch of transmitter 350 to turn on and off. Transmission switch control signal Tx_CS may include a first transmission switch control signal that turns off the switch of transmitter 350 and a second transmission switch control signal that turns on the switch of transmitter 350.

[0081] When the touch synchronization signal Tsync is low, the on / off controller 360 can generate a first transmission switch control signal to turn on the switch of the transmitter 350, and transmit the first transmission switch control signal to the transmitter 350. The switch of the transmitter 350 can then be turned off according to the first transmission switch control signal, thereby blocking power supplied from the power supply 215. Therefore, in the timing controller 216, when the touch synchronization signal Tsync is low, the transmitter 350 can be turned off. Figure 5 As shown, the timing controller 216 may not output CEDS packets including pixel data PDATA, data control signal DCS, and strobe control signal GCS during the touch sensor driving period TP1 to TPm.

[0082] In addition, when the touch synchronization signal Tsync is high, the on / off controller 360 can determine the operating mode of the timing controller 216 as normal mode and control the transmitter 350 and the power supply 215 to connect.

[0083] Specifically, when the touch synchronization signal Tsync is high, the on / off controller 360 can generate a second transmission switch control signal to turn on the switch of the transmitter 350, and transmit the second transmission switch control signal to the transmitter 350. The transmitter 350 can then be turned on according to the second transmission switch control signal, allowing power to be supplied from the power supply 215. Therefore, in the timing controller 216, the transmitter 350 can be turned on when the touch synchronization signal Tsync is high. Figure 5 As shown, the timing controller 216 can output CEDS packets, including pixel data PDATA, data control signal DCS, and strobe control signal GCS, through the transmitter 350 during the display driving period DP1 to DPn.

[0084] It has been described that, according to an example, the on / off controller 360 controls only the transmitter 350 to turn on and off, but this disclosure is not necessarily limited to this.

[0085] In another example, the on / off controller 360 can control not only the transmitter 350 but also the transmission link 340 and the power supply 215 to connect or disconnect from each other. When the touch synchronization signal Tsync is low, the on / off controller 360 can determine the operating mode of the timing controller 216 to a low-power mode and control each of the transmission link 340 and the transmitter 350 to disconnect from the power supply 215.

[0086] Specifically, transmission link 340 may include a switch that is connected to or disconnected from power supply 215, which provides power supply VCC. On / off controller 360 can generate a transmission switch control signal Tx_CS to control the switching on and off of transmitter 350, and a link switch control signal (not shown) to control the switching on and off of transmission link 340, based on the level of touch synchronization signal Tsync. The link switch control signal may include a first link switch control signal for disconnecting the switch of transmission link 340 and a second link switch control signal for connecting the switch of transmission link 340.

[0087] When the touch synchronization signal Tsync is low, the on / off controller 360 can generate a first transmission switch control signal that disconnects the switch of the transmitter 350, and transmit the first transmission switch control signal to the transmitter 350. Additionally, when the touch synchronization signal Tsync is low, the on / off controller 360 can generate a first link switch control signal that disconnects the switch of the transmission link 340, and transmit the first link switch control signal to the transmission link 340.

[0088] The switches of transmission link 340 and transmitter 350 can be disconnected according to the switch control signal, so that they do not need to be powered by power supply 215.

[0089] Furthermore, when the touch synchronization signal Tsync is high, the on / off controller 360 can determine the operating mode of the timing controller 216 to normal mode and control each of the transmission link 340 and the transmitter 350 to connect to the power supply 215.

[0090] Specifically, when the touch synchronization signal Tsync is high, the on / off controller 360 can generate a second transmission switch control signal to turn on the switch of the transmitter 350, and transmit the second transmission switch control signal to the transmitter 350. When the touch synchronization signal Tsync is high, the on / off controller 360 can generate a second link switch control signal to turn on the switch of the transmission link 340, and transmit the second link switch control signal to the transmission link 340.

[0091] The switches of transmission link 340 and transmitter 350 are turned on according to the switch control signal, so that power can be supplied from power supply 215.

[0092] In another example, the on / off controller 360 can control not only the transmitter 350 but also the clock generator 330 and the power supply 215 to connect or disconnect from each other. When the touch synchronization signal Tsync is low, the on / off controller 360 can determine the operating mode of the timing controller 216 to a low-power mode and control each of the clock generator 330 and the transmitter 350 to disconnect from the power supply 215.

[0093] Specifically, the clock generator 330 may include an on / off switch for connection to the power supply 215 providing power supply VCC. The on / off controller 360 may generate a transmission switch control signal Tx_CS to control the switching on and off of the transmitter 350, and a clock switch control signal CLK_CS to control the switching on and off of the clock generator 330, based on the level of the touch synchronization signal Tsync. The clock switch control signal CLK_CS may include a first clock switch control signal for turning off the switch of the clock generator 330 and a second clock switch control signal for turning on the switch of the clock generator 330.

[0094] When the touch synchronization signal Tsync is low, the on / off controller 360 can generate a first transmission switch control signal that turns off the switch of the transmitter 350, and transmit the first transmission switch control signal to the transmitter 350. Additionally, when the touch synchronization signal Tsync is low, the on / off controller 360 can generate a first clock switch control signal that turns off the switch of the clock generator 330, and transmit the first clock switch control signal to the clock generator 330.

[0095] The switches of clock generator 330 and transmitter 350 are turned off according to the switch control signal, so that they do not need to be powered by power supply 215.

[0096] Furthermore, when the touch synchronization signal Tsync is high, the on / off controller 360 can determine the operating mode of the timing controller 216 to normal mode and control each of the clock generator 330 and transmitter 350 to connect to the power supply 215.

[0097] Specifically, when the touch synchronization signal Tsync is high, the on / off controller 360 can generate a second transmission switch control signal to turn on the switch of the transmitter 350, and transmit the second transmission switch control signal to the transmitter 350. When the touch synchronization signal Tsync is high, the on / off controller 360 can generate a second clock switch control signal to turn on the switch of the clock generator 330, and transmit the second clock switch control signal to the transmission link 340.

[0098] The switches of clock generator 330 and transmitter 350 can be turned on according to the switch control signal, so that they can be powered by power supply 215.

[0099] In a timing controller 216 according to one embodiment of the present disclosure, at least one of the clock generator 330, transmission link 340, and transmitter 350 can be turned off during the touch sensor driving period TP1 to TPm. Therefore, the timing controller 216 according to one embodiment of the present disclosure can block power supply to at least one of the clock generator 330, transmission link 340, and transmitter 350 during the touch sensor driving period TP1 to TPm to prevent unnecessary power consumption. Thus, the timing controller 216 according to one embodiment of the present disclosure can reduce power consumption.

[0100] Furthermore, it has been described that at least one of the clock generator 330, transmission link 340 and transmitter 350 is connected to or disconnected from the power supply 215 according to an example on / off controller 360, but this disclosure is not necessarily limited thereto.

[0101] According to another example, the on / off controller 360 can control at least one of the clock generator 330, transmission link 340 and transmitter 350 to be activated or deactivated based on the level of the touch synchronization signal Tsync.

[0102] When the touch synchronization signal Tsync is low, the on / off controller 360 can determine the operating mode of the timing controller 216 to low-power mode and deactivate at least one of the clock generator 330, transmission link 340, and transmitter 350 to change their state to standby. Furthermore, when the touch synchronization signal Tsync is high, the on / off controller 360 can determine the operating mode of the timing controller 216 to normal mode and can activate the deactivated components.

[0103] In a timing controller 216 according to another embodiment of the present disclosure, at least one of the clock generator 330, transmission link 340 and transmitter 350 is deactivated for at least some time during the touch sensor driving period TP1 to TPm, thereby preventing unnecessary power consumption.

[0104] In addition, Figure 5 In this embodiment, the timing controller 216 operates in normal mode during the display driving period DP1 to DPn, and in low-power mode during the touch sensor driving period TP1 to TPm. That is, this embodiment illustrates that the timing controller 216 repeatedly operates in normal mode and low-power mode, but this disclosure is not necessarily limited to this.

[0105] In another example, the timing controller 216 can operate in any of the following modes: normal mode, low-power mode, and stable mode. More specifically, the timing controller 216 can operate in normal mode during the display driving periods DP1 to DPn. The timing controller 216 can operate in low-power mode from the start time point to a first time point of each touch sensor driving period TP1 to TPm, and in stable mode from the time point after the first time point of each touch sensor driving period TP1 to TPm to the end time point.

[0106] As described above, when the touch sensor driving period TP1 to TPm begins, the timing controller 216 can disconnect at least one of the switches of the clock generator 330, the transmission link 340, and the transmitter 350 to prevent unnecessary power consumption. In this case, as Figure 6 As shown, when the touch sensor driving period TP1 to TPm begins, since the data driver 212 does not receive data from the timing controller 216, its level can be changed to a low level, so that the data driver 212 can enter the unlock state.

[0107] Furthermore, during the display drive periods DP1 to DPn, components that have been turned off in the clock generator 330, transmission link 340, and transmitter 350 are turned on again, and the timing controller 216 can send CEDS packets to the data driver 212. In this case, the timing controller 216 needs to ensure a stable period PLP before the start of the display drive periods DP1 to DPn to ensure stable data transmission and reception.

[0108] In the timing controller 216, when a component that has been turned off is turned on again, the component that generates the clock signal (e.g., clock generator 330 or PLL 430) generates the clock signal again. In this case, clock generator 330 or PLL 430 requires a predetermined time for the phase and frequency of the clock signal to be fixed so that the clock signal stabilizes.

[0109] Additionally, the data driver 212 can generate a clock signal again to receive data from the timing controller 216. In the data driver 212, the phase and frequency of the clock signal are fixed, allowing the clock signal to be stabilized, and its level becomes high, enabling the data driver 212 to enter a locked state.

[0110] As described above, a stable period PLP is required for stable data transmission and reception between the timing controller 216 and the data driver 212. Therefore, the timing controller 216 can operate in stable mode during the stable period PLP before the start of the display drive period DP1 to DPn.

[0111] In the following description, for the sake of convenience, it will be described that when the touch sensor driving period TP1 to TPm begins, the on / off controller 360 only turns on the transmitter 350, but this disclosure is not limited thereto. As described above, when the touch sensor driving period TP1 to TPm begins, the on / off controller 360 can turn on at least one of the clock generator 330, the transmission link 340, and the transmitter 350.

[0112] Specifically, the on / off controller 360 can generate a second transmission switch control signal to turn on the switch of the transmitter 350 at a time point after the first time point of each touch sensor driving period TP1 to TPm.

[0113] In one example, the on / off controller 360 can internally count the time from the start point of each touch sensor driving period TP1 to TPm, and when a preset time has elapsed, the on / off controller 360 can generate a second transmission switch control signal to turn on the transmitter 350. In this case, the preset time can be a shorter time than the duration of each touch sensor driving period TP1 to TPm.

[0114] Specifically, when the on / off controller 360 receives a low-level touch synchronization signal Tsync, the on / off controller 360 can generate a first transmission switch control signal that turns off the switch of the transmitter 350, and transmit the first transmission switch control signal to the transmitter 350. Therefore, in the timing controller 216, since no power is supplied to the transmitter 350, no data or control signals can be output. That is to say, the timing controller 216 can operate in a low-power mode.

[0115] Furthermore, when a preset time has elapsed since the on / off controller 360 received the low-level touch synchronization signal Tsync, the on / off controller 360 can generate a second transmission switch control signal to turn on the transmitter 350 and transmit the second transmission switch control signal to the transmitter 350. Therefore, in the timing controller 216, power can be supplied to the transmitter 350, and clock training data CTD can be output to the data driver 212 through the transmitter 350. In other words, the timing controller 216 can operate in a stable mode.

[0116] When the data driver 212 receives the clock training data CTD, it can begin clock training to stably receive data. Once the phase and frequency of the clock signal are fixed to stabilize the clock signal, the data driver 212 can enter a locked state.

[0117] In another example, the on / off controller 360 can receive an additional second touch synchronization signal Tsync2 from the touch synchronization signal generator 370.

[0118] Specifically, the touch synchronization signal generator 370 can generate a first touch synchronization signal Tsync1 and a second touch synchronization signal Tsync2. The first touch synchronization signal Tsync1 divides a frame 1F time period into a display driving period DP and a touch sensor driving period TP, while the second touch synchronization signal Tsync2 ensures a stable time during the touch sensor driving period TP before the start of the display driving period DP.

[0119] like Figure 6 As shown, when the on / off controller 360 receives a low-level first touch synchronization signal Tsync1 and a low-level second touch synchronization signal Tsync2 from the touch synchronization signal generator 370, the on / off controller 360 can generate a first transmission switch control signal that turns off the switch of the transmitter 350, and transmit the first transmission switch control signal to the transmitter 350. Therefore, in the timing controller 216, power can be supplied to the transmitter 350, and no data or control signals can be output. That is, the timing controller 216 can operate in a low-power mode.

[0120] Furthermore, when the on / off controller 360 receives a high-level second touch synchronization signal Tsync2 from the touch synchronization signal generator 370, the on / off controller 360 can generate a second transmission switch control signal to turn on the switch of the transmitter 350, and transmit the second transmission switch control signal to the transmitter 350. Therefore, in the timing controller 216, power can be supplied to the transmitter 350, and clock training data CTD can be output to the data driver 212 through the transmitter 350. That is to say, the timing controller 216 can operate in a stable mode.

[0121] When the data driver 212 receives the clock training data CTD, it can begin clock training to stably receive data. When the phase and frequency of the clock signal are fixed, making the clock signal stable, the data driver 212 can enter a locked state.

[0122] Additionally, when the on / off controller 360 receives a high-level first touch synchronization signal Tsync1 from the touch synchronization signal generator 370, the on / off controller 360 can transmit the high-level first touch synchronization signal Tsync1 to the transmitter 350. While the transmitter 350 is operating in normal mode, it can output CEDS packets to the data driver 212 and a gating control signal GCS to the gating driver 214 based on the high-level first touch synchronization signal Tsync1.

[0123] Since the timing controller 216 according to another embodiment of the present disclosure operates in a stable mode during the stable period PLP before the start of each display driving period DP1 to DPn, it is possible to prevent data loss transmitted to the data driver 212.

[0124] In addition, Figures 3 to 5 It has been described that during the touch sensor driving periods TP1 to TPm, all components of transmitter 350 are turned off and thus not powered, but this disclosure is not necessarily limited to this. In another example, on / off controller 360 may turn off only the first data transmission unit 420 of transmitter 350 for at least some time during each touch sensor driving period TP1 to TPm. Among the components of transmitter 350, the first data transmission unit 420 has the highest power consumption, so it may be turned off during the touch sensor driving periods TP1 to TPm. Furthermore, compared to the first data transmission unit 420, PLL 430 has relatively low power consumption and requires time to stabilize the clock signal generated when the first data transmission unit 420 is turned off and on again. Therefore, even during the touch sensor driving periods TP1 to TPm, PLL 430 can reduce or eliminate the stabilization period PLP by keeping it on.

[0125] In addition, Figure 3 and Figure 4 The example illustrates a first data transmission unit 420, but this disclosure is not necessarily limited to this. In another example, the first data transmission unit 420 may be configured as multiple first data transmission units 420. In this case, the timing controller 216 may sequentially activate multiple first data transmission units 420. This will be referred to... Figure 7 and Figure 8 Detailed description.

[0126] Figure 7 This is an example Figure 4 A diagram of another example of the transmitter is shown, and Figure 8 This is a waveform diagram illustrating the sequential activation of multiple first data transmission units.

[0127] Reference Figure 7 and Figure 8 The transmitter 350 may include a PLL 430 and a plurality of first data transmission units 420-1 and 420-2 to 420-n.

[0128] PLL 430 can receive a first clock signal CLK from clock generator 330 and generate a second clock signal. PLL 430 can provide the second clock signal to each of the plurality of first data transmission units 420-1 to 420-n.

[0129] Multiple first data transmission units 420-1 to 420-n can be connected in a point-to-point manner to multiple source driver ICs SDIC1 to SDICn included in the data driver 212, and transmit CEDS packets CEDS1 to CEDSn.

[0130] In one example, the touch synchronization signal generator 370 can generate a first touch synchronization signal Tsync1 and a second touch synchronization signal Tsync2. The first touch synchronization signal Tsync1 divides a frame 1F time period into a display driving period DP and a touch sensor driving period TP, while the second touch synchronization signal Tsync2 is used to ensure a stable time during the touch sensor driving period TP before the start of the display driving period DP.

[0131] When the on / off controller 360 receives a low-level first touch synchronization signal Tsync1 and a low-level second touch synchronization signal Tsync2 from the touch synchronization signal generator 370, the on / off controller 360 can generate a first clock switch control signal that turns off the switch of PLL 430 and a first transmission switch control signal that turns off the switch of each of the plurality of first data transmission units 420-1 to 420-n. The on / off controller 360 can simultaneously transmit the first clock switch control signal and the first transmission switch control signal to PLL 430 and each of the plurality of first data transmission units 420-1 to 420-n. Therefore, the switches of PLL 430 and each of the plurality of first data transmission units 420-1 to 420-n can be turned off simultaneously. In addition, in the transmitter 350, power can be withheld from PLL 430 and the plurality of first data transmission units 420-1 to 420-n, and CEDS packets CEDS1 to CEDSn can be withheld from the plurality of source driver ICs SDIC1 to SDICn.

[0132] Additionally, when the on / off controller 360 receives a high-level second touch synchronization signal Tsync2 from the touch synchronization signal generator 370, the on / off controller 360 can generate a second clock switch control signal PLL_ON that turns on the switch of PLL 430 and second transmission switch control signals EN1 to ENn that turn on the switches of multiple first data transmission units 420-1 to 420-n.

[0133] The on / off controller 360 can first transmit the second clock switch control signal PLL_ON to PLL 430 to stabilize the clock signal during the stable period of PLP. Then, the on / off controller 360 can sequentially transmit the second transmission switch control signals EN1 to ENn to multiple first data transmission units 420-1 to 420-n. Therefore, the multiple first data transmission units 420-1 to 420-n do not need to be enabled simultaneously, but can be enabled sequentially.

[0134] When the current increases rapidly, the power supply of power supply 215 may become unstable. In this case, the circuit characteristics receiving power from power supply 215 may deteriorate.

[0135] Since the timing controller 216 according to another embodiment of the present disclosure can sequentially turn on multiple first data transmission units 420-1 to 420-n, the peak current of the power supply 215 can be distributed. Therefore, the timing controller 216 according to another embodiment of the present disclosure can stably receive power from the power supply 215 to prevent degradation of the characteristics of the internal circuitry.

[0136] Figure 9This is a flowchart illustrating a driving method for a timing controller according to one embodiment of the present disclosure.

[0137] Reference Figure 9 First, the timing controller 216 generates a first touch synchronization signal Tsync1 at a first level (S901). In one example, the timing controller 216 may generate a high-level first touch synchronization signal Tsync1 during the display driving period DP.

[0138] exist Figure 9 The generation of the first touch synchronization signal Tsync1 by the timing controller 216 has already been described, but this disclosure is not necessarily limited thereto. In another example, the timing controller 216 may receive the first touch synchronization signal Tsync1 from the touch controller 220.

[0139] Then, the timing controller 216 operates in normal mode during the display drive period DP of one frame (S902). Specifically, while operating in normal mode during the display drive period DP, the timing controller 216 outputs pixel data PDATA, data control signal DCS, and strobe control signal GCS.

[0140] In one implementation, the timing controller 216 can output to the data driver 212 a CEDS packet in which the data control signal DCS and the clock signal are embedded between multiple pixel data PDATA.

[0141] Then, the timing controller 216 generates a first touch synchronization signal Tsync1 at a second level and a second touch synchronization signal Tsync2 at a second level (S903). In one embodiment, the timing controller 216 may generate a low-level first touch synchronization signal Tsync1 and a low-level second touch synchronization signal Tsync2 during the touch sensor driving period TP.

[0142] Then, the timing controller 216 operates in low-power mode for at least some of the touch sensor driving period TP within a frame period (S904). Specifically, when the first touch synchronization signal Tsync1 of the second level is generated, the timing controller 216 disconnects at least one of the clock generator 330, transmission link 340 and transmitter 350 from the power supply 215 while operating in low-power mode.

[0143] In one example, transmitter 350 may include a plurality of first data transmission units 420. When a first touch synchronization signal Tsync1 of the second level is generated, timing controller 216 may simultaneously disconnect each of the plurality of first data transmission units 420 from power supply 215.

[0144] Next, the timing controller 216 generates a second touch synchronization signal Tsync2 at a first level (S905). When a first time period shorter than the touch sensor driving period TP has elapsed, the timing controller 216 can generate the second touch synchronization signal Tsync2 at the first level.

[0145] Then, the timing controller 216 operates in stable mode during the stable period PLP (S906). Specifically, the timing controller 216 can turn on components in the clock generator 330, transmission link 340, and transmitter 350 that are turned off in low-power mode. In addition, the timing controller 216 can output clock training data CTD to the data driver 212 during the stable period PLP.

[0146] In one example, transmitter 350 may include a plurality of first data transmission units 420. Timing controller 216 may sequentially connect each of the plurality of first data transmission units 420 to power supply 215 during a stable period PLP.

[0147] For example, when the touch sensor driving period TP begins and a first time period shorter than the duration of the touch sensor driving period TP has elapsed, the timing controller 216 can connect one first data transmission unit 420 to the power supply 215. When the touch sensor driving period TP begins and a second time period shorter than the duration of the touch sensor driving period TP but longer than the first time period has elapsed, the timing controller 216 can connect another first data transmission unit 420 to the power supply 215. When the touch sensor driving period TP begins and a third time period shorter than the duration of the touch sensor driving period TP but longer than the second time period has elapsed, the timing controller 216 can connect yet another first data transmission unit 420 to the power supply 215.

[0148] Then, the timing controller 216 can repeat operations S901 to S906.

[0149] According to this disclosure, the timing controller can operate in a low-power mode during the touch sensor driving period. Therefore, this disclosure can prevent the timing controller from unnecessarily consuming power during the touch sensor driving period.

[0150] Furthermore, according to this disclosure, the timing controller can operate in a stable mode during a stable period before the start of the display driving period. Therefore, this disclosure can prevent data loss transmitted from the timing controller to the data driver.

[0151] Furthermore, since this disclosure sequentially activates multiple first data transmission units, it can distribute the peak current of the power supply. Therefore, in this disclosure, the timing controller can stably receive power from the power supply and prevent the characteristics of the internal circuitry from deteriorating.

Claims

1. A timing controller, the timing controller comprising: A receiver that receives timing synchronization signals and digital video data; A data processor that generates gating control signals and data control signals based on the timing synchronization signal, and converts the digital video data into pixel data; as well as The transmitter operates in a normal mode during the display driving period to output the pixel data, the strobe control signal, and the data control signal; operates in a low-power mode from the beginning of the touch sensor driving period until a certain point in time, in which the transmitter is disconnected from the power supply; and operates in a stable mode from that point in time until the end of the touch sensor driving period, in which the transmitter is connected to the power supply.

2. The timing controller according to claim 1, further comprising an on / off controller, the on / off controller controlling the connection between the transmitter and the power supply according to an operating mode.

3. The timing controller according to claim 2, wherein, The on / off controller: When the operating mode is the normal mode, the transmitter is connected to the power supply.

4. The timing controller according to claim 2, wherein, The transmitter includes: A phase-locked loop (PLL) receives a first clock signal and generates a second clock signal; and A data transmission unit that, in response to the second clock signal, converts parallel data into serial data and outputs the serial data. When the operating mode is the low-power mode, the on / off controller controls at least one of the data transmission unit and the phase-locked loop to disconnect from the power supply.

5. The timing controller according to claim 1, wherein, The transmitter outputs a clock embedded data signaling (CEDS) packet that includes the pixel data, the data control signal, and the clock signal.

6. The timing controller according to claim 1, further comprising: A clock generator that receives a reference clock signal and generates a first clock signal; A transmission link that synchronizes the pixel data and the data control signal with the first clock signal, and outputs the synchronized pixel data and the synchronized data control signal to the transmitter; as well as An on / off controller that controls each of the transmission link and the transmitter to disconnect from the power supply when the operating mode is the low-power mode, and controls each of the transmission link and the transmitter to connect to the power supply when the operating mode is the normal mode.

7. A timing controller, the timing controller comprising: A clock generator that receives a reference clock signal and generates a first clock signal; A transmission link that synchronizes pixel data and data control signals with the first clock signal and outputs synchronized pixel data and synchronized data control signals; A transmitter that is activated during the display driving period to output the pixel data and the data control signal to the data driver of the display panel, and is deactivated for at least some time during the touch sensor driving period; A touch synchronization signal generator generates the touch synchronization signal to divide a frame time period into the display driving period period and the touch sensor driving period period; as well as An on / off controller that controls the transmitter to be activated or connected to a power source based on the level of the touch synchronization signal. Wherein, the on / off controller: When the touch synchronization signal is low, the transmitter is disconnected from the power supply; and After a first period of time shorter than the time of the touch sensor driving period, the transmitter is controlled to connect to the power supply.

8. The timing controller according to claim 7, in, The on / off controller controls at least one of the clock generator, the transmission link, and the transmitter to be activated or connected to the power supply based on the level of the touch synchronization signal.

9. The timing controller according to claim 8, wherein, The on / off controller: When the touch synchronization signal is low, at least one of the clock generator, the transmission link, and the transmitter is disconnected from the power supply; and When the touch synchronization signal is high, control each of the clock generator, the transmission link, and the transmitter to connect to the power supply.

10. The timing controller according to claim 8, wherein, The touch synchronization signal includes: A first touch synchronization signal, wherein the first touch synchronization signal is used to divide the time into the display driving period and the touch sensor driving period; and A second touch synchronization signal is used to ensure a stable time during the touch sensor driving period prior to the start of the display driving period.

11. The timing controller according to claim 10, wherein, The on / off controller: When the first touch synchronization signal is a low-level signal, at least one of the clock generator, the transmission link, and the transmitter is disconnected from the power supply; and When the second touch synchronization signal is a high-level signal, control each of the clock generator, the transmission link, and the transmitter to connect to the power supply.

12. The timing controller according to claim 8, wherein, The transmitter includes: A phase-locked loop (PLL) receives the first clock signal and generates a second clock signal; and Multiple data transmission units, which, in response to the second clock signal, convert parallel data into serial data and output the serial data. Specifically, when the touch synchronization signal is a low-level signal, the on / off controller controls each of the plurality of data transmission units to simultaneously disconnect from the power supply; after a first time period shorter than the touch sensor driving period, it controls one data transmission unit to connect to the power supply; and after a second time period shorter than the touch sensor driving period period but longer than the first time period, it controls another data transmission unit to connect to the power supply.

13. A method for driving a timing controller, the method comprising the following steps: A first timing synchronization signal is generated by a touch synchronization signal generator, which divides a frame time period into a display driving period period and a touch sensor driving period period. When a high-level first timing synchronization signal is generated, the transmitter operates in normal mode to output pixel data, strobe control signals and data control signals to the data driver of the display panel. When a low-level first timing synchronization signal is generated, the transmitter operates in a low-power mode in which the transmitter is disconnected from the power supply. A second timing synchronization signal is generated by the touch synchronization signal generator to ensure a stable time during the touch sensor driving period prior to the start of the display driving period; as well as When a high-level second timing synchronization signal is generated, the transmitter operates in a stable mode connected to the power supply to output clock training data.

14. The method of claim 13, wherein when operating in the low-power mode: The transmitter is deactivated; or The transmitter is disconnected from the power source.

15. The method according to claim 13, wherein, The transmitter includes multiple data transmission units, and When operating in the stable mode, the plurality of data transmission units are activated sequentially, or the plurality of data transmission units are connected to the power supply sequentially.

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